backend-infra-engineer: Pre-0.2.2 2024 Q3 snapshot

.github/workflows/cmake.yml

@@ -0,0 +1,53 @@
+name: CMake
+
+on:
+  push:
+    paths:
+      - 'src/**'
+      - 'test/**'
+    branches: [ "master" ]
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'test/**'
+    branches: [ "master" ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Debug
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    
+    - name: Install Video Libs
+      run: sudo apt install libglew-dev 
+      
+    - name: Install Audio Libs
+      run: sudo apt install libwavpack-dev
+
+    - name: Install Abseil-cpp
+      run: sudo apt install libabsl-dev
+
+    - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+    - name: Build
+      # Build your program with the given configuration
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      # Execute tests defined by the CMake configuration.  
+      # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
+      run: ${{github.workspace}}/build/bin/yaze_test

.github/workflows/doxy.yml

@@ -0,0 +1,45 @@
+name: Doxygen Action
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ master ]
+
+
+  
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    # Delete the html directory if it exists
+    - name: Delete html directory
+      run: rm -rf html
+
+    # Installs graphviz for DOT graphs
+    - name: Install graphviz
+      run: sudo apt-get install graphviz
+        
+    - name: Doxygen Action
+      uses: mattnotmitt/doxygen-action@v1.1.0
+      with:
+        # Path to Doxyfile
+        doxyfile-path: "./Doxyfile" # default is ./Doxyfile
+        # Working directory
+        working-directory: "." # default is .
+    
+    - name: Deploy
+      uses: peaceiris/actions-gh-pages@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        # Default Doxyfile build documentation to html directory. 
+        # Change the directory if changes in Doxyfile
+        publish_dir: ./html

.gitignore

@@ -0,0 +1,19 @@
+build/
+.cache/
+.vscode/
+src/lib/SDL2
+src/lib/cmake
+src/lib/GL
+src/lib/abseil-cpp
+src/lib/libGLEW.2.2.0.dylib
+src/lib/libGLEW.2.2.dylib
+src/lib/libGLEW.a
+src/lib/libGLEW.dylib
+src/lib/libSDL2_test.a
+src/lib/libSDL2-2.0.0.dylib
+src/lib/libSDL2.a
+src/lib/libSDL2.dylib
+src/lib/libSDL2main.a
+checks.json
+assets/lib/libasar.dll
+cmake/yaze.plist.in

.gitmodules

@@ -1,3 +1,24 @@
-[submodule "src/Library/imgui"]
+[submodule "src/lib/imgui"]
-	path = src/Library/imgui
+	path = src/lib/imgui
 	url = https://github.com/ocornut/imgui.git
+[submodule "src/lib/ImGuiFileDialog"]
+	path = src/lib/ImGuiFileDialog
+	url = https://github.com/aiekick/ImGuiFileDialog.git
+[submodule "src/lib/ImGuiColorTextEdit"]
+	path = src/lib/ImGuiColorTextEdit
+	url = https://github.com/BalazsJako/ImGuiColorTextEdit.git
+[submodule "assets/asm/alttp-hacker-workspace"]
+	path = assets/asm/alttp-hacker-workspace
+	url = https://github.com/scawful/alttp-hacker-workspace.git
+[submodule "src/lib/abseil-cpp"]
+	path = src/lib/abseil-cpp
+	url = https://github.com/abseil/abseil-cpp.git
+[submodule "src/lib/SDL"]
+	path = src/lib/SDL
+	url = https://github.com/libsdl-org/SDL.git
+[submodule "src/lib/asar"]
+	path = src/lib/asar
+	url = https://github.com/RPGHacker/asar.git
+[submodule "src/lib/imgui_test_engine"]
+	path = src/lib/imgui_test_engine
+	url = https://github.com/ocornut/imgui_test_engine.git

CMakeLists.txt

@@ -0,0 +1,34 @@
+# CMake Specifications 
+cmake_minimum_required(VERSION 3.10)
+
+# Yet Another Zelda3 Editor
+# by scawful
+project(yaze VERSION 0.10)
+
+# C++ Standard Specifications 
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
+set(BUILD_SHARED_LIBS OFF)
+set(CMAKE_FIND_FRAMEWORK LAST) 
+
+# Abseil Standard Specifications
+include(cmake/absl.cmake)
+
+# Video Libraries 
+find_package(PNG REQUIRED)
+include(cmake/sdl2.cmake)
+
+# Asar 
+add_subdirectory(src/lib/asar/src)
+include(cmake/asar.cmake)
+
+# ImGui
+include(cmake/imgui.cmake)
+
+# Project Files
+add_subdirectory(src)

LICENSE

@@ -0,0 +1,15 @@
+Copyright (C) 2022 Justin Scofield
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+

README.md

@@ -0,0 +1,53 @@
+# Yet Another Zelda3 Editor
+
+- Platform: Windows, macOS, GNU/Linux
+- Dependencies: SDL2, ImGui
+
+## Description
+
+General purpose editor for The Legend of Zelda: A Link to the Past for the Super Nintendo.
+
+Takes heavy inspiration from ALTTP community efforts such as [Hyrule Magic](https://www.romhacking.net/utilities/200/) and [ZScream](https://github.com/Zarby89/ZScreamDungeon)
+
+Building and installation
+-------------------------
+[CMake](http://www.cmake.org "CMake") is required to build yaze 
+
+1. Clone the repository
+
+```
+  git clone --recurse-submodules https://github.com/scawful/yaze.git 
+```
+
+2. Create the build directory and configuration
+
+```
+  cmake -S . -B build
+```
+
+3. Build and run.
+
+```
+  cmake --build build
+```
+
+## Documentation
+
+- For users, please refer to [getting_started.md](docs/getting-started.md) for instructions on how to use yaze.
+- For developers, please refer to the [documentation](https://scawful.github.io/yaze/index.html) for information on the project's infrastructure.
+
+License
+--------
+YAZE is distributed under the [GNU GPLv3](https://www.gnu.org/licenses/gpl-3.0.txt) license.
+
+SDL2, ImGui and Abseil are subject to respective licenses.
+
+Screenshots
+--------
+![image](https://github.com/scawful/yaze/assets/47263509/8b62b142-1de4-4ca4-8c49-d50c08ba4c8e)
+
+![image](https://github.com/scawful/yaze/assets/47263509/d8f0039d-d2e4-47d7-b420-554b20ac626f)
+
+![image](https://github.com/scawful/yaze/assets/47263509/34b36666-cbea-420b-af90-626099470ae4)
+
+

assets/asm/mosaic_change.asm

@@ -0,0 +1,32 @@
+
+org <HOOK>
+  JML AreaCheck
+
+org <EXPANDED_SPACE>
+
+AreaCheck:
+  PHB : PHK : PLB
+
+  TAX
+  LDA .pool, X
+
+  BEQ .noMosaic1
+      PLB
+      JML $02AAE5
+
+  .noMosaic1
+
+  LDX $8A
+  LDA .pool, X
+
+  BEQ .noMosaic2
+      PLB
+      JML $02AAE5
+
+  .noMosaic2
+
+  PLB
+  JML $02AAF4
+
+  NOP
+  .pool

assets/asm/template_song.asm

@@ -0,0 +1,160 @@
+; 
+; Credit to Zarby89 
+; 
+lorom
+
+!End = $00
+!Rest = $C9
+!Tie = $C8
+
+macro SetChannelVolume(v)
+db $ED, <v>
+endmacro
+
+macro SetMasterVolume(v)
+db $E5, <v>
+endmacro
+
+macro SetTempo(v)
+db $E7, <v>
+endmacro
+
+macro SetInstrument(v)
+db $E0, <v>
+endmacro
+
+macro CallSubroutine(addr, repeat)
+db $EF
+dw <addr>
+db <repeat>
+endmacro
+
+;1/4 = $48
+;1/4 double = $6C
+;1/4 triplet = $30
+;1/8 = $24
+;1/8 double = $36
+;1/8 triplet = $18
+;1/16 = $12
+;1/16 double = $1B
+;1/32 = $09
+; To make a whole note you tie 4 1/4 so something like
+;%SetDuration(48)
+;db !C4, !Tie, !Tie, !Tie ; will play a whole note (1/1)
+;db !C4, !Tie ; will play a half note (1/2)
+
+macro SetDuration(v)
+db <v>, $7F
+endmacro
+
+
+!C1 = $80
+!C1s = $81
+!D1 = $82
+!D1s = $83
+!E1 = $84
+!F1 = $85
+!F1s = $86
+!G1 = $87
+!G1s = $88
+!A1 = $89
+!A1s = $8A
+!B1 = $8B
+
+
+!C2 = $8C
+!C2s = $8D
+!D2 = $8E
+!D2s = $8F
+!E2 = $90
+!F2 = $91
+!F2s = $92
+!G2 = $93
+!G2s = $94
+!A2 = $95
+!A2s = $96
+!B2 = $97
+
+
+!C3 = $98
+!C3s = $99
+!D3 = $9A
+!D3s = $9B
+!E3 = $9C
+!F3 = $9D
+!F3s = $9E
+!G3 = $9F
+!G3s = $A0
+!A3 = $A1
+!A3s = $A2
+!B3 = $A3
+
+!C4 = $A4
+!C4s = $A5
+!D4 = $A6
+!D4s = $A7
+!E4 = $A8
+!F4 = $A9
+!F4s = $AA
+!G4 = $AB
+!G4s = $AC
+!A4 = $AD
+!A4s = $AE
+!B4 = $AF
+
+!C5 = $B0
+!C5s = $B1
+!D5 = $B2
+!D5s = $B3
+!E5 = $B4
+!F5 = $B5
+!F5s = $B6
+!G5 = $B7
+!G5s = $B8
+!A5 = $B9
+!A5s = $BA
+!B5 = $BB
+
+!C6 = $BC
+!C6s = $BD
+!D6 = $BE
+!D6s = $BF
+!E6 = $C0
+!F6 = $C1
+!F6s = $C2
+!G6 = $C3
+!G6s = $C4
+!A6 = $C5
+!A6s = $C6
+!B6 = $C7
+
+org $1A9FF8 ; Hyrule Castle (Song Header information)
+Sections: 
+!ARAMAddr = $D0FF
+!StartingAddr = Sections
+dw !ARAMAddr+$0A
+dw !ARAMAddr+$0A
+dw $00FF
+dw !ARAMAddr
+dw $0000
+
+Channels: 
+!ARAMC = !ARAMAddr-Sections
+dw Channel0+!ARAMC
+dw $0000
+dw $0000
+dw $0000
+dw $0000
+dw $0000
+dw $0000
+dw $0000
+
+
+Channel0:
+SetMasterVolume($80)
+SetTempo($40)
+SetInstrument($17)
+
+db !Rest, !Rest, !Rest
+
+db !End

assets/layouts/overworld.zeml

@@ -0,0 +1,25 @@
+BeginTabBar title="##OwEditorTabBar" {
+  BeginTabItem title="Map Editor" {
+    Function id="owToolset",
+
+    Table id="##owEditTable" count="2" flags="Resizable|Reorderable|Hideable|BordersOuter|BordersV" {
+      TableSetupColumn title="Canvas" flags="WidthStretch",
+      TableSetupColumn title="Tile Selector" flags="WidthFixed" width="256",
+      TableHeadersRow
+      TableNextRow,
+      TableNextColumn,
+      Function id="OverworldCanvas",
+      TableNextColumn,
+      Function id="OverworldTileSelector",
+    }
+  }
+  BeginTabItem title="Tile16 Editor" {
+    Function id="OwTile16Editor"
+  }
+  BeginTabItem title "Graphics Group Editor" {
+    Function id="OwGfxGroupEditor"
+  }
+  BeginTabItem title="Usage Statistics" {
+    Function id="OwUsageStats"
+  }
+}

cmake/absl.cmake

@@ -0,0 +1,20 @@
+find_package(absl)
+set(ABSL_PROPAGATE_CXX_STD ON)
+set(ABSL_CXX_STANDARD 17)
+set(ABSL_USE_GOOGLETEST_HEAD ON)
+set(ABSL_ENABLE_INSTALL ON)
+set(
+  ABSL_TARGETS   
+  absl::strings
+  absl::flags
+  absl::status
+  absl::statusor
+  absl::examine_stack
+  absl::stacktrace
+  absl::base
+  absl::config
+  absl::core_headers
+  absl::raw_logging_internal
+  absl::failure_signal_handler
+  absl::flat_hash_map
+)

cmake/asar.cmake

@@ -0,0 +1,33 @@
+get_target_property(ASAR_INCLUDE_DIR asar-static INCLUDE_DIRECTORIES)
+target_include_directories(asar-static PRIVATE ${ASAR_INCLUDE_DIR})
+set(ASAR_GEN_EXE OFF)
+set(ASAR_GEN_DLL ON)
+set(ASAR_GEN_LIB ON)
+set(ASAR_GEN_EXE_TEST OFF)
+set(ASAR_GEN_DLL_TEST OFF)
+
+set(ASAR_STATIC_SRC
+  "../src/lib/asar/src/asar/interface-lib.cpp"
+  "../src/lib/asar/src/asar/addr2line.cpp"
+  "../src/lib/asar/src/asar/arch-65816.cpp"
+  "../src/lib/asar/src/asar/arch-spc700.cpp"
+  "../src/lib/asar/src/asar/arch-superfx.cpp"
+  "../src/lib/asar/src/asar/assembleblock.cpp"
+  "../src/lib/asar/src/asar/crc32.cpp"
+  "../src/lib/asar/src/asar/libcon.cpp"
+  "../src/lib/asar/src/asar/libsmw.cpp"
+  "../src/lib/asar/src/asar/libstr.cpp"
+  "../src/lib/asar/src/asar/macro.cpp"
+  "../src/lib/asar/src/asar/main.cpp"
+  "../src/lib/asar/src/asar/asar_math.cpp"
+  "../src/lib/asar/src/asar/virtualfile.cpp"
+  "../src/lib/asar/src/asar/warnings.cpp"
+  "../src/lib/asar/src/asar/errors.cpp"
+  "../src/lib/asar/src/asar/platform/file-helpers.cpp"
+)
+
+if(WIN32 OR MINGW)
+  list(APPEND ASAR_STATIC_SRC "../src/lib/asar/src/asar/platform/windows/file-helpers-win32.cpp")
+else()
+  list(APPEND ASAR_STATIC_SRC "../src/lib/asar/src/asar/platform/linux/file-helpers-linux.cpp")
+endif()

cmake/imgui.cmake

@@ -0,0 +1,43 @@
+# gui libraries ---------------------------------------------------------------
+set(IMGUI_PATH  ${CMAKE_SOURCE_DIR}/src/lib/imgui)
+file(GLOB IMGUI_SOURCES ${IMGUI_PATH}/*.cpp)
+add_library("ImGui" STATIC ${IMGUI_SOURCES})
+target_include_directories("ImGui" PUBLIC ${IMGUI_PATH})
+target_include_directories(ImGui PUBLIC ${SDL2_INCLUDE_DIR})
+target_compile_definitions(ImGui PUBLIC 
+  IMGUI_IMPL_OPENGL_LOADER_CUSTOM=<SDL2/SDL_opengl.h>  GL_GLEXT_PROTOTYPES=1)
+
+set(IMGUI_FILE_DLG_PATH ${CMAKE_SOURCE_DIR}/src/lib/ImGuiFileDialog)
+file(GLOB IMGUI_FILE_DLG_SOURCES ${IMGUI_FILE_DLG_PATH}/*.cpp)
+add_library("ImGuiFileDialog" STATIC ${IMGUI_FILE_DLG_SOURCES})
+target_include_directories(ImGuiFileDialog PUBLIC ${IMGUI_PATH})
+target_compile_definitions(ImGuiFileDialog PUBLIC 
+  IMGUI_IMPL_OPENGL_LOADER_CUSTOM=<SDL2/SDL_opengl.h>  GL_GLEXT_PROTOTYPES=1)
+
+set(IMGUI_COLOR_TEXT_EDIT_PATH ${CMAKE_SOURCE_DIR}/src/lib/ImGuiColorTextEdit)
+file(GLOB IMGUI_COLOR_TEXT_EDIT_SOURCES ${IMGUI_COLOR_TEXT_EDIT_PATH}/*.cpp)
+add_library("ImGuiColorTextEdit" STATIC ${IMGUI_COLOR_TEXT_EDIT_SOURCES})
+target_include_directories(ImGuiColorTextEdit PUBLIC ${IMGUI_PATH})
+target_compile_definitions(ImGuiColorTextEdit PUBLIC 
+  IMGUI_IMPL_OPENGL_LOADER_CUSTOM=<SDL2/SDL_opengl.h>  GL_GLEXT_PROTOTYPES=1)
+
+set(IMGUI_TEST_ENGINE_PATH ${CMAKE_SOURCE_DIR}/src/lib/imgui_test_engine/imgui_test_engine)
+file(GLOB IMGUI_TEST_ENGINE_SOURCES ${IMGUI_TEST_ENGINE_PATH}/*.cpp)
+add_library("ImGuiTestEngine" STATIC ${IMGUI_TEST_ENGINE_SOURCES})
+target_include_directories(ImGuiTestEngine PUBLIC ${IMGUI_PATH})
+target_link_libraries(ImGuiTestEngine PUBLIC ImGui)
+target_compile_definitions(ImGuiTestEngine PUBLIC 
+  IMGUI_IMPL_OPENGL_LOADER_CUSTOM=<SDL2/SDL_opengl.h>  GL_GLEXT_PROTOTYPES=1)
+
+set(
+  IMGUI_SRC
+  ${IMGUI_PATH}/imgui.cpp 
+  ${IMGUI_PATH}/imgui_demo.cpp
+  ${IMGUI_PATH}/imgui_draw.cpp 
+  ${IMGUI_PATH}/imgui_widgets.cpp
+  ${IMGUI_PATH}/backends/imgui_impl_sdl2.cpp
+  ${IMGUI_PATH}/backends/imgui_impl_sdlrenderer2.cpp 
+  ${IMGUI_PATH}/misc/cpp/imgui_stdlib.cpp
+  ${IMGUI_FILE_DLG_PATH}/ImGuiFileDialog.cpp
+  ${IMGUI_COLOR_TEXT_EDIT_PATH}/TextEditor.cpp
+)

cmake/sdl2.cmake

@@ -0,0 +1,6 @@
+# SDL2
+if (UNIX)
+  add_subdirectory(src/lib/SDL)
+else()
+  find_package(SDL2)
+endif()

docs/build-instructions.md

@@ -0,0 +1,27 @@
+# Build Instructions
+
+## Windows
+
+For VSCode users, use the following CMake extensions with MinGW-w64
+
+https://marketplace.visualstudio.com/items?itemName=twxs.cmake
+https://marketplace.visualstudio.com/items?itemName=ms-vscode.cmake-tools
+
+https://www.msys2.org/
+
+Add to environment variables `C:\msys64\mingw64\bin`
+
+Install the following packages using `pacman -S <package-name>`
+
+`mingw-w64-x86_64-gcc`
+`mingw-w64-x86_64-gcc-libs`
+`mingw-w64-x86_64-cmake`
+`mingw-w64-x86_64-glew`
+`mingw-w64-x86_64-lib-png`
+
+# macOS
+
+- Clang 15.0.1 x86_64-apple-darrwin22.5.0
+- SDL2 Source v2.26.5
+- Removed snes_spc
+- Removed asar_static

docs/compression.md

@@ -0,0 +1,66 @@
+# LC_LZ2 Compression
+
+The compression algorithm has multiple implementations with varying levels of quality, based primarily on the implementations made in skarsnik/sneshacking, Zarby89/ZScreamDungeon and ZCompress with optimizations made for C++.
+
+Currently, the Compress and Uncompress methods from Hyrule Magic are used and all other compression methods are considered deprecated.
+
+## Key Definitions
+
+### Constants and Macros:
+- `BUILD_HEADER(command, length)`: Macro to build a header from a command and a length.
+- Command Constants: Constants to represent different commands like `kCommandDirectCopy`, `kCommandByteFill`, etc.
+- Length and Mode Constants: Such as `kMaxLengthNormalHeader`, `kNintendoMode1`, etc.
+
+### Data Structures:
+
+#### 1. CompressionCommand:
+   - **arguments**: 2D array representing the command arguments for each possible command.
+   - **cmd_size**: Array storing the size of each possible command.
+   - **data_size**: Array storing the size of the data processed by each possible command.
+
+#### 2. CompressionPiece:
+   - **command**: Represents the compression command.
+   - **length**: Length of the compressed data piece.
+   - **argument_length**: Length of the argument.
+   - **argument**: Argument as a string.
+   - **next**: Pointer to the next compression piece.
+
+#### 3. CompressionContext (for Compression V3):
+   - Contains vectors to store raw and compressed data, compression pieces, and compression string.
+   - Various counters and flags for compression control.
+   - Current compression command details.
+
+## Compression Functions
+
+### Version 1:
+- **Byte Repeat**: `CheckByteRepeat`
+- **Word Repeat**: `CheckWordRepeat`
+- **Increasing Byte**: `CheckIncByte`
+- **Intra Copy**: `CheckIntraCopy`
+- **Validation and Alternatives**: `ValidateForByteGain` & `CompressionCommandAlternative`
+
+### Version 2:
+- **Byte Repeat**: `CheckByteRepeatV2`
+- **Word Repeat**: `CheckWordRepeatV2`
+- **Increasing Byte**: `CheckIncByteV2`
+- **Intra Copy**: `CheckIntraCopyV2`
+- **Validation and Alternatives**: `ValidateForByteGainV2` & `CompressionCommandAlternativeV2`
+
+### Version 3:
+Using `CompressionContext` to handle compression.
+- **Initialization**: `InitializeCompression`
+- **Command Checks**: Such as `CheckByteRepeatV3`
+- **Determining Best Compression**: `DetermineBestCompression`
+- **Handling Direct Copy**: `HandleDirectCopy`
+- **Adding Compression to Chain**: `AddCompressionToChain`
+
+## Decompression Functions:
+- `SetBuffer`: Prepares a buffer from data.
+- `memfill`: Fills memory.
+- **Decompression**: Such as `DecompressV2`, `DecompressGraphics`, and `DecompressOverworld`.
+
+## Utility Functions:
+- **Printing**: Such as `PrintCompressionPiece` and `PrintCompressionChain`.
+- **Compression String Creation**: `CreateCompressionString`
+- **Compression Result Validation**: Such as `ValidateCompressionResult` and its V3 variant.
+- **Compression Piece Manipulation**: Like `SplitCompressionPiece` and its V3 variant.

docs/getting-started.md

@@ -0,0 +1,23 @@
+# Getting Started with YAZE
+
+This software allows you to modify the classic SNES game "The Legend of Zelda: A Link to the Past" by editing its ROM file. With this editor, you can change various aspects of the game, such as the maps, sprites, items, and more.
+
+Please note that this project is currently a work in progress, and some features may not be fully implemented or may be subject to change.
+
+## Prerequisites
+Before you start using YAZE, make sure you have the following:
+
+- A copy of "The Legend of Zelda: A Link to the Past" ROM file (US or JP)
+- Basic knowledge of hexadecimal and binary data
+
+## Usage
+To use the Link to the Past ROM Editor, follow these steps:
+
+Open the ROM file using the "File" menu.
+
+...
+
+Save your changes using the "File" menu.
+Backup files are enabled by default. Each save will produce a timestamped copy of your ROM before you last saved.
+
+That's it! With these instructions, you should be able to get started with using YAZE. Happy editing!

docs/infrastructure.md

@@ -0,0 +1,140 @@
+# YAZE Infrastructure Overview
+
+For developers to reference.
+
+## Directory Structure
+
+- **.github/workflows**: Contains `yaze_test` workflow config.
+- **assets**: Hosts assets like fonts.
+- **cmake**: Contains CMake configurations.
+- **docs**: Contains documentation for users and developers.
+  - [Getting Started](./getting-started.md)
+  - [LC_LZ2 Compression](./compression.md)
+- **src**: Contains source files. 
+  - **app**: Contains the GUI editor `yaze`
+  - **cli**: Contains the command line interface `z3ed`
+  - **lib**: Contains git submodule dependencies.
+    - Abseil-cpp
+    - Asar
+    - ImGui
+      - ImGuiFileDialog
+      - ImGuiColorTextEdit
+      - imgui_memory_editor
+    - SDL2
+- **test**: Contains testing interface `yaze_test`
+
+### Flow of Control
+
+- [app/yaze.cc](../src/app/yaze.cc) 
+  - Initializes `absl::FailureSignalHandler` for stack tracing.
+  - Runs the `core::Controller` loop.
+- [app/core/controller.cc](../src/app/core/controller.cc)
+  - Initializes SDLRenderer and SDLWindow
+  - Initializes ImGui, fonts, themes, and clipboard.
+  - Handles user input from keyboard and mouse.
+  - Updates `editor::MasterEditor`
+  - Renders the output to the screen.
+  - Handles the teardown of SDL and ImGui resources.
+- [app/editor/master_editor.cc](../src/app/editor/master_editor.cc)
+  - Handles the main menu bar.
+    - File
+      - Open - [app::ROM::LoadFromFile](../src/app/rom.cc#l=90)
+      - Save - [app::ROM::SaveToFile](../src/app/rom.cc#l=301)
+    - Edit
+    - View
+      - Emulator
+      - HEX Editor
+      - ASM Editor
+      - Palette Editor
+      - Memory Viewer
+      - ImGui Demo
+      - GUI Tools
+        - Runtime Metrics
+        - Style Editor
+    - Help
+  - Handles `absl::Status` errors as popups delivered to the user.
+  - Update all the editors in a tab view.
+    - [app/editor/assembly_editor.cc](../src/app/editor/assembly_editor.cc)
+    - [app/editor/dungeon_editor.cc](../src/app/editor/dungeon_editor.cc)
+    - [app/editor/graphics_editor.cc](../src/app/editor/graphics_editor.cc)
+    - [app/editor/music_editor.cc](../src/app/editor/music_editor.cc)
+    - [app/editor/overworld_editor.cc](../src/app/editor/overworld_editor.cc)
+    - [app/editor/screen_editor.cc](../src/app/editor/screen_editor.cc)
+    - [app/editor/sprite_editor.cc](../src/app/editor/sprite_editor.cc)
+
+## ROM
+- [app/rom.cc](../src/app/rom.cc)
+- [app/rom.h](../src/app/rom.h)
+---
+
+This `ROM` class provides methods to manipulate and access data from a ROM.
+
+- **Key Methods**:
+  - `Load2BppGraphics()`: Loads 2BPP graphics data from specified sheets.
+  - `LoadAllGraphicsData()`: Loads all graphics data, both compressed and uncompressed, converting where necessary.
+  - `LoadFromFile(const absl::string_view& filename, bool z3_load)`: Loads ROM data from a file. It also handles headers and Zelda 3 specific data if requested.
+  - `LoadFromPointer(uchar* data, size_t length)`: Loads ROM data from a provided pointer.
+  - `LoadFromBytes(const Bytes& data)`: Loads ROM data from bytes.
+  - `LoadAllPalettes()`: Loads all color palettes used in the ROM. This includes palettes for various elements like sprites, shields, swords, etc.
+  - `UpdatePaletteColor(...)`: Updates a specific color within a named palette group.
+
+- **Internal Data Structures**:
+  - `rom_data_`: A container that holds the ROM data.
+  - `graphics_bin_`: Holds the graphics data.
+  - `palette_groups_`: A map containing various palette groups, each having its own set of color palettes.
+
+- **Special Notes**:
+  - The class interacts with various external functionalities, such as decompression algorithms (`gfx::DecompressV2`) and color conversion (`gfx::SnesTo8bppSheet`).
+  - Headers in the ROM data, if present, are identified and removed.
+  - Specific Zelda 3 data can be loaded if specified.
+  - Palettes are categorized into multiple groups (e.g., `ow_main`, `ow_aux`, `hud`, etc.) and loaded accordingly.
+
+## Bitmap
+
+- [app/gfx/bitmap.cc](../src/app/gfx/bitmap.cc)
+- [app/gfx/bitmap.h](../src/app/gfx/bitmap.cc)
+---
+
+This class is responsible for creating, managing, and manipulating bitmap data, which can be displayed on the screen using the ImGui library.
+
+### Key Attributes:
+
+1. **Width, Height, Depth, and Data Size**: These represent the dimensions and data size of the bitmap. 
+2. **Pixel Data**: Points to the raw data of the bitmap.
+3. **Texture and Surface**: Use SDL to manage the graphical representation of the bitmap data. Both these attributes have custom deleters, ensuring proper resource management.
+
+### Main Functions:
+
+1. **Constructors**: Multiple constructors allow for different ways to create a Bitmap instance, like specifying width, height, depth, and data.
+2. **Create**: This set of overloaded functions provides ways to create a bitmap from different data sources.
+3. **CreateFromSurface**: Allows for the creation of a bitmap from an SDL_Surface.
+4. **Apply**: Changes the bitmap's data to a new set of Bytes.
+5. **Texture Operations**:
+   - **CreateTexture**: Creates an SDL_Texture from the bitmap's data for rendering.
+   - **UpdateTexture**: Updates the SDL_Texture with the latest bitmap data.
+6. **SaveSurfaceToFile**: Saves the SDL_Surface to a file.
+7. **SetSurface**: Assigns a new SDL_Surface to the bitmap.
+8. **Palette Functions**:
+   - **ApplyPalette (Overloaded)**: This allows for the application of a SNESPalette or a standard SDL_Color palette to the bitmap.
+9. **WriteToPixel**: Directly writes a value to a specified position in the pixel data.
+
+## Z3ED cli
+
+| Command | Arg | Params | Status |
+|---------|-----|--------|--------|
+| Apply BPS Patch | -a | rom_file bps_file | In progress |
+| Create BPS Patch | -c | bps_file src_file modified_file | Not started |
+| Open ROM | -o | rom_file | Complete |
+| Backup ROM | -b | rom_file [new_file] | In progress |
+| Expand ROM | -x | rom_file file_size | Not started |
+| Transfer Tile16 | -t | src_rom dest_rom tile32_id_list(csv) | Complete |
+| Export Graphics | -e | rom_file bin_file | In progress |
+| Import Graphics | -i | bin_file rom_file | Not started |
+| SNES to PC Address | -s | address | Complete |
+| PC to SNES Address | -p | address | Complete |
+
+
+## Further Development Ideas
+- Extend `zelda3` namespace with additional functionalities.
+- Optimize program performance.
+- Introduce new features in the GUI editor.

src/CMakeLists.txt

@@ -0,0 +1,112 @@
+set(
+  YAZE_APP_CORE_SRC
+  app/core/common.cc
+  app/core/controller.cc
+  app/core/labeling.cc
+  app/emu/emulator.cc
+)
+
+set(
+  YAZE_APP_GFX_SRC
+  app/gfx/bitmap.cc
+  app/gfx/compression.cc
+  app/gfx/scad_format.cc
+  app/gfx/snes_palette.cc
+  app/gfx/snes_tile.cc
+  app/gfx/snes_color.cc
+  app/gfx/tilesheet.cc
+)
+
+set(
+  YAZE_GUI_SRC
+  app/gui/asset_browser.cc
+  app/gui/canvas.cc
+  app/gui/input.cc
+  app/gui/style.cc
+  app/gui/color.cc
+  app/gui/zeml.cc
+)
+
+set(
+  YAZE_APP_EMU_SRC
+  app/emu/audio/apu.cc
+  app/emu/audio/spc700.cc
+  app/emu/audio/dsp.cc
+  app/emu/audio/internal/addressing.cc
+  app/emu/audio/internal/instructions.cc
+  app/emu/cpu/internal/addressing.cc
+  app/emu/cpu/internal/instructions.cc
+  app/emu/cpu/cpu.cc
+  app/emu/video/ppu.cc
+  app/emu/memory/dma.cc
+  app/emu/memory/memory.cc
+  app/emu/snes.cc
+)
+
+set(SDL_TARGETS SDL2::SDL2)
+
+if(WIN32 OR MINGW)
+    list(PREPEND SDL_TARGETS SDL2::SDL2main ws2_32)
+    add_definitions(-DSDL_MAIN_HANDLED)
+endif()
+
+if (WIN32 OR MINGW OR UNIX AND NOT APPLE)
+  list(APPEND YAZE_APP_CORE_SRC
+    app/core/platform/font_loader.cc
+    app/core/platform/clipboard.cc
+  )
+endif()
+
+if(APPLE)
+    list(APPEND YAZE_APP_CORE_SRC 
+      app/core/platform/file_dialog.mm
+      app/core/platform/app_delegate.mm
+      app/core/platform/font_loader.mm
+      app/core/platform/clipboard.mm
+      app/core/platform/file_path.mm
+    )
+
+    find_library(COCOA_LIBRARY Cocoa)
+    if(NOT COCOA_LIBRARY)
+        message(FATAL_ERROR "Cocoa not found")
+    endif()
+    set(CMAKE_EXE_LINKER_FLAGS "-framework ServiceManagement -framework Foundation -framework Cocoa")
+endif()
+
+include(app/CMakeLists.txt)
+# include(cli/CMakeLists.txt) Excluded for now, macOS include breaks action build
+
+if (UNIX)
+  target_compile_definitions(yaze PRIVATE "linux")
+  target_compile_definitions(yaze PRIVATE "stricmp=strcasecmp")
+endif()
+
+if(MACOS)         
+  set(MACOSX_BUNDLE_ICON_FILE ${CMAKE_SOURCE_DIR}/yaze.ico)
+  set_target_properties(yaze 
+      PROPERTIES
+      BUNDLE True
+      ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+      LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+      MACOSX_BUNDLE_INFO_PLIST ${CMAKE_SOURCE_DIR}/cmake/yaze.plist.in
+  )
+elseif(UNIX)
+  set_target_properties(yaze 
+    PROPERTIES
+    BUNDLE True
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+  )
+else()
+set_target_properties(yaze
+    PROPERTIES
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+    LINK_FLAGS "${CMAKE_CURRENT_SOURCE_DIR}/yaze.res"
+)
+endif()
+
+add_subdirectory(test)

src/app/CMakeLists.txt

@@ -0,0 +1,40 @@
+include(app/editor/CMakeLists.txt)
+include(app/zelda3/CMakeLists.txt)
+
+add_executable(
+  yaze
+  app/yaze.cc
+  app/rom.cc
+  ${YAZE_APP_EMU_SRC}
+  ${YAZE_APP_CORE_SRC}
+  ${YAZE_APP_EDITOR_SRC}
+  ${YAZE_APP_GFX_SRC}
+  ${YAZE_APP_ZELDA3_SRC}
+  ${YAZE_GUI_SRC}
+  ${IMGUI_SRC}
+  ${IMGUI_TEST_ENGINE_SOURCES}
+)
+
+target_include_directories(
+  yaze PUBLIC
+  lib/
+  app/
+  ${CMAKE_SOURCE_DIR}/src/
+  ${CMAKE_SOURCE_DIR}/src/lib/imgui_test_engine
+  ${PNG_INCLUDE_DIRS}
+  ${SDL2_INCLUDE_DIR}
+)
+
+target_link_libraries(
+  yaze PUBLIC
+  ${ABSL_TARGETS}
+  ${SDL_TARGETS}
+  ${PNG_LIBRARIES}
+  ${CMAKE_DL_LIBS}
+  ImGuiTestEngine
+  ImGui
+)
+
+if (APPLE)
+  target_link_libraries(yaze PUBLIC ${COCOA_LIBRARY})
+endif()

src/app/core/common.cc

@@ -0,0 +1,187 @@
+#include "common.h"
+
+#include "imgui/imgui.h"
+
+#include <chrono>
+#include <cstdint>
+#include <functional>
+#include <memory>
+#include <stack>
+#include <string>
+
+#include "absl/strings/str_format.h"
+
+namespace yaze {
+namespace app {
+namespace core {
+
+std::shared_ptr<ExperimentFlags::Flags> ExperimentFlags::flags_;
+
+std::string UppercaseHexByte(uint8_t byte, bool leading) {
+  if (leading) {
+    std::string result = absl::StrFormat("0x%02X", byte);
+    return result;
+  }
+  std::string result = absl::StrFormat("%02X", byte);
+  return result;
+}
+std::string UppercaseHexWord(uint16_t word) {
+  std::string result = absl::StrFormat("0x%04X", word);
+  return result;
+}
+std::string UppercaseHexLong(uint32_t dword) {
+  std::string result = absl::StrFormat("0x%06X", dword);
+  return result;
+}
+
+uint32_t SnesToPc(uint32_t addr) {
+  if (addr >= 0x808000) {
+    addr -= 0x808000;
+  }
+  uint32_t temp = (addr & 0x7FFF) + ((addr / 2) & 0xFF8000);
+  return (temp + 0x0);
+}
+
+uint32_t PcToSnes(uint32_t addr) {
+  uint8_t *b = reinterpret_cast<uint8_t *>(&addr);
+  b[2] = static_cast<uint8_t>(b[2] * 2);
+
+  if (b[1] >= 0x80) {
+    b[2] += 1;
+  } else {
+    b[1] += 0x80;
+  }
+
+  return addr;
+}
+
+uint32_t MapBankToWordAddress(uint8_t bank, uint16_t addr) {
+  uint32_t result = 0;
+  result = (bank << 16) | addr;
+  return result;
+}
+
+int AddressFromBytes(uint8_t addr1, uint8_t addr2, uint8_t addr3) {
+  return (addr1 << 16) | (addr2 << 8) | addr3;
+}
+
+// hextodec has been imported from SNESDisasm to parse hex numbers
+int HexToDec(char *input, int length) {
+  int result = 0;
+  int value;
+  int ceiling = length - 1;
+  int power16 = 16;
+
+  int j = ceiling;
+
+  for (; j >= 0; j--) {
+    if (input[j] >= 'A' && input[j] <= 'F') {
+      value = input[j] - 'F';
+      value += 15;
+    } else {
+      value = input[j] - '9';
+      value += 9;
+    }
+
+    if (j == ceiling) {
+      result += value;
+      continue;
+    }
+
+    result += (value * power16);
+    power16 *= 16;
+  }
+
+  return result;
+}
+
+bool StringReplace(std::string &str, const std::string &from,
+                   const std::string &to) {
+  size_t start = str.find(from);
+  if (start == std::string::npos) return false;
+
+  str.replace(start, from.length(), to);
+  return true;
+}
+
+void stle(uint8_t *const p_arr, size_t const p_index, unsigned const p_val) {
+  uint8_t v = (p_val >> (8 * p_index)) & 0xff;
+
+  p_arr[p_index] = v;
+}
+
+void stle0(uint8_t *const p_arr, unsigned const p_val) {
+  stle(p_arr, 0, p_val);
+}
+
+void stle1(uint8_t *const p_arr, unsigned const p_val) {
+  stle(p_arr, 1, p_val);
+}
+
+void stle2(uint8_t *const p_arr, unsigned const p_val) {
+  stle(p_arr, 2, p_val);
+}
+
+void stle3(uint8_t *const p_arr, unsigned const p_val) {
+  stle(p_arr, 3, p_val);
+}
+void stle16b(uint8_t *const p_arr, uint16_t const p_val) {
+  stle0(p_arr, p_val);
+  stle1(p_arr, p_val);
+}
+// "Store little endian 16-bit value using a byte pointer, offset by an
+// index before dereferencing"
+void stle16b_i(uint8_t *const p_arr, size_t const p_index,
+               uint16_t const p_val) {
+  stle16b(p_arr + (p_index * 2), p_val);
+}
+// "load little endian value at the given byte offset and shift to get its
+// value relative to the base offset (powers of 256, essentially)"
+unsigned ldle(uint8_t const *const p_arr, unsigned const p_index) {
+  uint32_t v = p_arr[p_index];
+
+  v <<= (8 * p_index);
+
+  return v;
+}
+
+// Helper function to get the first byte in a little endian number
+uint32_t ldle0(uint8_t const *const p_arr) { return ldle(p_arr, 0); }
+
+// Helper function to get the second byte in a little endian number
+uint32_t ldle1(uint8_t const *const p_arr) { return ldle(p_arr, 1); }
+
+// Helper function to get the third byte in a little endian number
+uint32_t ldle2(uint8_t const *const p_arr) { return ldle(p_arr, 2); }
+
+// Helper function to get the third byte in a little endian number
+uint32_t ldle3(uint8_t const *const p_arr) { return ldle(p_arr, 3); }
+// Load little endian halfword (16-bit) dereferenced from
+uint16_t ldle16b(uint8_t const *const p_arr) {
+  uint16_t v = 0;
+
+  v |= (ldle0(p_arr) | ldle1(p_arr));
+
+  return v;
+}
+// Load little endian halfword (16-bit) dereferenced from an arrays of bytes.
+// This version provides an index that will be multiplied by 2 and added to the
+// base address.
+uint16_t ldle16b_i(uint8_t const *const p_arr, size_t const p_index) {
+  return ldle16b(p_arr + (2 * p_index));
+}
+
+// Initialize the static member
+std::stack<ImGuiID> ImGuiIdIssuer::idStack;
+
+uint32_t Get24LocalFromPC(uint8_t *data, int addr, bool pc) {
+  uint32_t ret = (PcToSnes(addr) & 0xFF0000) | (data[addr + 1] << 8) | data[addr];
+  if (pc) {
+    return SnesToPc(ret);
+  }
+  return ret;
+}
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze

src/app/core/common.h

@@ -0,0 +1,234 @@
+#ifndef YAZE_CORE_COMMON_H
+#define YAZE_CORE_COMMON_H
+
+#include "imgui/imgui.h"
+
+#include <chrono>
+#include <cstdint>
+#include <fstream>
+#include <functional>
+#include <iostream>
+#include <memory>
+#include <stack>
+#include <string>
+
+namespace yaze {
+namespace app {
+
+/**
+ * @namespace yaze::app::core
+ * @brief Core application logic and utilities.
+ */
+namespace core {
+
+/**
+ * @class ExperimentFlags
+ * @brief A class to manage experimental feature flags.
+ */
+class ExperimentFlags {
+ public:
+  struct Flags {
+    // Bitmap manager abstraction to manage graphics bin of Rom.
+    bool kUseBitmapManager = true;
+
+    // Log instructions to the GUI debugger.
+    bool kLogInstructions = true;
+
+    // Flag to enable ImGui input config flags. Currently is
+    // handled manually by controller class but should be
+    // ported away from that eventually.
+    bool kUseNewImGuiInput = false;
+
+    // Flag to enable the saving of all palettes to the Rom.
+    bool kSaveAllPalettes = false;
+
+    // Flag to enable the saving of gfx groups to the rom.
+    bool kSaveGfxGroups = false;
+
+    // Flag to enable the change queue, which could have any anonymous
+    // save routine for the Rom. In practice, just the overworld tilemap
+    // and tile32 save.
+    bool kSaveWithChangeQueue = false;
+
+    // Attempt to run the dungeon room draw routine when opening a room.
+    bool kDrawDungeonRoomGraphics = true;
+
+    // Use the new platform specific file dialog wrappers.
+    bool kNewFileDialogWrapper = true;
+
+    // Platform specific loading of fonts from the system. Currently
+    // only supports macOS.
+    bool kLoadSystemFonts = true;
+
+    // Uses texture streaming from SDL for my dynamic updates.
+    bool kLoadTexturesAsStreaming = true;
+
+    // Save dungeon map edits to the Rom.
+    bool kSaveDungeonMaps = false;
+
+    // Log to the console.
+    bool kLogToConsole = false;
+
+    // Load audio device for emulator
+    bool kLoadAudioDevice = false;
+
+    // Overworld flags
+    struct Overworld {
+      // Load and render overworld sprites to the screen. Unstable.
+      bool kDrawOverworldSprites = false;
+
+      // Save overworld map edits to the Rom.
+      bool kSaveOverworldMaps = true;
+
+      // Save overworld entrances to the Rom.
+      bool kSaveOverworldEntrances = true;
+
+      // Save overworld exits to the Rom.
+      bool kSaveOverworldExits = true;
+
+      // Save overworld items to the Rom.
+      bool kSaveOverworldItems = true;
+
+      // Save overworld properties to the Rom.
+      bool kSaveOverworldProperties = true;
+    } overworld;
+  };
+
+  ExperimentFlags() = default;
+  virtual ~ExperimentFlags() = default;
+  auto flags() const {
+    if (!flags_) {
+      flags_ = std::make_shared<Flags>();
+    }
+    Flags *flags = flags_.get();
+    return flags;
+  }
+  Flags *mutable_flags() {
+    if (!flags_) {
+      flags_ = std::make_shared<Flags>();
+    }
+    return flags_.get();
+  }
+
+ private:
+  static std::shared_ptr<Flags> flags_;
+};
+
+/**
+ * @class NotifyValue
+ * @brief A class to manage a value that can be modified and notify when it
+ * changes.
+ */
+template <typename T>
+class NotifyValue {
+ public:
+  NotifyValue() : value_(), modified_(false), temp_value_() {}
+  NotifyValue(const T &value)
+      : value_(value), modified_(false), temp_value_() {}
+
+  void set(const T &value) {
+    value_ = value;
+    modified_ = true;
+  }
+
+  const T &get() {
+    modified_ = false;
+    return value_;
+  }
+
+  T &mutable_get() {
+    modified_ = false;
+    temp_value_ = value_;
+    return temp_value_;
+  }
+
+  void apply_changes() {
+    if (temp_value_ != value_) {
+      value_ = temp_value_;
+      modified_ = true;
+    }
+  }
+
+  void operator=(const T &value) { set(value); }
+  operator T() { return get(); }
+
+  bool modified() const { return modified_; }
+
+ private:
+  T value_;
+  bool modified_;
+  T temp_value_;
+};
+
+class ImGuiIdIssuer {
+ private:
+  static std::stack<ImGuiID> idStack;
+
+ public:
+  // Generate and push a new ID onto the stack
+  static ImGuiID GetNewID() {
+    static int counter = 1;  // Start from 1 to ensure uniqueness
+    ImGuiID child_id = ImGui::GetID((void *)(intptr_t)counter++);
+    idStack.push(child_id);
+    return child_id;
+  }
+
+  // Pop all IDs from the stack (can be called explicitly or upon program exit)
+  static void Cleanup() {
+    while (!idStack.empty()) {
+      idStack.pop();
+    }
+  }
+};
+
+class Logger {
+ public:
+  static void log(std::string message) {
+    static std::ofstream fout("log.txt", std::ios::out | std::ios::app);
+    fout << message << std::endl;
+  }
+
+  // log to console
+  static void logc(std::string message) { logs.emplace_back(message); }
+
+  static std::vector<std::string> logs;
+};
+
+std::string UppercaseHexByte(uint8_t byte, bool leading = false);
+std::string UppercaseHexWord(uint16_t word);
+std::string UppercaseHexLong(uint32_t dword);
+
+uint32_t SnesToPc(uint32_t addr);
+uint32_t PcToSnes(uint32_t addr);
+
+uint32_t MapBankToWordAddress(uint8_t bank, uint16_t addr);
+
+int AddressFromBytes(uint8_t addr1, uint8_t addr2, uint8_t addr3);
+int HexToDec(char *input, int length);
+
+bool StringReplace(std::string &str, const std::string &from,
+                   const std::string &to);
+
+void stle16b_i(uint8_t *const p_arr, size_t const p_index,
+               uint16_t const p_val);
+uint16_t ldle16b_i(uint8_t const *const p_arr, size_t const p_index);
+
+uint16_t ldle16b(uint8_t const *const p_arr);
+
+void stle16b(uint8_t *const p_arr, uint16_t const p_val);
+
+struct FolderItem {
+  std::string name;
+  std::vector<FolderItem> subfolders;
+  std::vector<std::string> files;
+};
+
+typedef struct FolderItem FolderItem;
+
+uint32_t Get24LocalFromPC(uint8_t *data, int addr, bool pc = true);
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/core/constants.h

@@ -0,0 +1,852 @@
+#ifndef YAZE_APP_CORE_CONSTANTS_H
+#define YAZE_APP_CORE_CONSTANTS_H
+
+#include <vector>
+
+#include "absl/strings/string_view.h"
+
+#define TAB_BAR(w) if (ImGui::BeginTabBar(w)) {
+#define END_TAB_BAR() \
+  ImGui::EndTabBar(); \
+  }
+
+#define TAB_ITEM(w) if (ImGui::BeginTabItem(w)) {
+#define END_TAB_ITEM() \
+  ImGui::EndTabItem(); \
+  }
+
+#define MENU_ITEM(w) if (ImGui::MenuItem(w))
+#define MENU_ITEM2(w, v) if (ImGui::MenuItem(w, v))
+
+#define BUTTON_COLUMN(w)    \
+  ImGui::TableNextColumn(); \
+  ImGui::Button(w);
+
+#define TEXT_COLUMN(w)      \
+  ImGui::TableNextColumn(); \
+  ImGui::Text(w);
+
+#define BEGIN_TABLE(l, n, f) if (ImGui::BeginTable(l, n, f, ImVec2(0, 0))) {
+#define SETUP_COLUMN(l) ImGui::TableSetupColumn(l);
+
+#define TABLE_HEADERS()     \
+  ImGui::TableHeadersRow(); \
+  ImGui::TableNextRow();
+
+#define NEXT_COLUMN() ImGui::TableNextColumn();
+
+#define END_TABLE()  \
+  ImGui::EndTable(); \
+  }
+
+#define HOVER_HINT(string) \
+  if (ImGui::IsItemHovered()) ImGui::SetTooltip(string);
+
+#define PRINT_IF_ERROR(expression)                \
+  {                                               \
+    auto error = expression;                      \
+    if (!error.ok()) {                            \
+      std::cout << error.ToString() << std::endl; \
+    }                                             \
+  }
+
+#define EXIT_IF_ERROR(expression)                 \
+  {                                               \
+    auto error = expression;                      \
+    if (!error.ok()) {                            \
+      std::cout << error.ToString() << std::endl; \
+      return EXIT_FAILURE;                        \
+    }                                             \
+  }
+
+#define RETURN_VOID_IF_ERROR(expression)          \
+  {                                               \
+    auto error = expression;                      \
+    if (!error.ok()) {                            \
+      std::cout << error.ToString() << std::endl; \
+      return;                                     \
+    }                                             \
+  }
+
+#define RETURN_IF_ERROR(expression) \
+  {                                 \
+    auto error = expression;        \
+    if (!error.ok()) {              \
+      return error;                 \
+    }                               \
+  }
+
+#define ASSIGN_OR_RETURN(type_variable_name, expression)         \
+  ASSIGN_OR_RETURN_IMPL(APPEND_NUMBER(error_or_value, __LINE__), \
+                        type_variable_name, expression)
+
+#define ASSIGN_OR_RETURN_IMPL(error_or_value, type_variable_name, expression) \
+  auto error_or_value = expression;                                           \
+  if (!error_or_value.ok()) {                                                 \
+    return error_or_value.status();                                           \
+  }                                                                           \
+  type_variable_name = std::move(*error_or_value);
+
+#define ASSIGN_OR_LOG_ERROR(type_variable_name, expression)         \
+  ASSIGN_OR_LOG_ERROR_IMPL(APPEND_NUMBER(error_or_value, __LINE__), \
+                           type_variable_name, expression)
+
+#define ASSIGN_OR_LOG_ERROR_IMPL(error_or_value, type_variable_name, \
+                                 expression)                         \
+  auto error_or_value = expression;                                  \
+  if (!error_or_value.ok()) {                                        \
+    std::cout << error_or_value.status().ToString() << std::endl;    \
+  }                                                                  \
+  type_variable_name = std::move(*error_or_value);
+
+#define APPEND_NUMBER(expression, number) \
+  APPEND_NUMBER_INNER(expression, number)
+
+#define APPEND_NUMBER_INNER(expression, number) expression##number
+
+#define TEXT_WITH_SEPARATOR(text) \
+  ImGui::Text(text);              \
+  ImGui::Separator();
+
+#define TABLE_BORDERS_RESIZABLE \
+  ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable
+
+#define CLEAR_AND_RETURN_STATUS(status) \
+  if (!status.ok()) {                   \
+    auto temp = status;                 \
+    status = absl::OkStatus();          \
+    return temp;                        \
+  }
+
+using ushort = unsigned short;
+using uint = unsigned int;
+using uchar = unsigned char;
+using Bytes = std::vector<uint8_t>;
+
+using OWBlockset = std::vector<std::vector<uint16_t>>;
+struct OWMapTiles {
+  OWBlockset light_world;    // 64 maps
+  OWBlockset dark_world;     // 64 maps
+  OWBlockset special_world;  // 32 maps
+};
+using OWMapTiles = struct OWMapTiles;
+
+namespace yaze {
+namespace app {
+namespace core {
+
+constexpr uint32_t kRedPen = 0xFF0000FF;
+constexpr float kYazeVersion = 0.2;
+
+// ============================================================================
+// Magic numbers
+// ============================================================================
+
+/// Bit set for object priority
+constexpr ushort TilePriorityBit = 0x2000;
+
+/// Bit set for object hflip
+constexpr ushort TileHFlipBit = 0x4000;
+
+/// Bit set for object vflip
+constexpr ushort TileVFlipBit = 0x8000;
+
+/// Bits used for tile name
+constexpr ushort TileNameMask = 0x03FF;
+
+constexpr int Uncompressed3BPPSize = 0x0600;
+constexpr int UncompressedSheetSize = 0x0800;
+
+constexpr int NumberOfRooms = 296;
+
+constexpr int NumberOfColors = 3143;
+
+// ============================================================================
+//  Game Graphics
+// ============================================================================
+
+constexpr int tile_address = 0x1B52;           // JP = Same
+constexpr int tile_address_floor = 0x1B5A;     // JP = Same
+constexpr int subtype1_tiles = 0x8000;         // JP = Same
+constexpr int subtype2_tiles = 0x83F0;         // JP = Same
+constexpr int subtype3_tiles = 0x84F0;         // JP = Same
+constexpr int gfx_animated_pointer = 0x10275;  // JP 0x10624 //long pointer
+
+constexpr int hud_palettes = 0xDD660;
+constexpr int maxGfx = 0xC3FB5;
+
+constexpr int kTilesheetWidth = 128;
+constexpr int kTilesheetHeight = 32;
+constexpr int kTilesheetDepth = 8;
+
+// TEXT EDITOR RELATED CONSTANTS
+constexpr int gfx_font = 0x70000;  // 2bpp format
+constexpr int text_data = 0xE0000;
+constexpr int text_data2 = 0x75F40;
+constexpr int pointers_dictionaries = 0x74703;
+constexpr int characters_width = 0x74ADF;
+
+constexpr int entrance_gfx_group = 0x5D97;
+
+// ============================================================================
+// Gravestones related variables
+// ============================================================================
+
+constexpr int GravesYTilePos = 0x49968;    // short (0x0F entries)
+constexpr int GravesXTilePos = 0x49986;    // short (0x0F entries)
+constexpr int GravesTilemapPos = 0x499A4;  // short (0x0F entries)
+constexpr int GravesGFX = 0x499C2;         // short (0x0F entries)
+
+constexpr int GravesXPos = 0x4994A;      // short (0x0F entries)
+constexpr int GravesYLine = 0x4993A;     // short (0x08 entries)
+constexpr int GravesCountOnY = 0x499E0;  // Byte 0x09 entries
+
+constexpr int GraveLinkSpecialHole = 0x46DD9;    // short
+constexpr int GraveLinkSpecialStairs = 0x46DE0;  // short
+
+// ============================================================================
+// Names
+// ============================================================================
+
+static const std::string RoomEffect[] = {"Nothing",
+                                         "Nothing",
+                                         "Moving Floor",
+                                         "Moving Water",
+                                         "Trinexx Shell",
+                                         "Red Flashes",
+                                         "Light Torch to See Floor",
+                                         "Ganon's Darkness"};
+
+static const std::string RoomTag[] = {"Nothing",
+
+                                      "NW Kill Enemy to Open",
+                                      "NE Kill Enemy to Open",
+                                      "SW Kill Enemy to Open",
+                                      "SE Kill Enemy to Open",
+                                      "W Kill Enemy to Open",
+                                      "E Kill Enemy to Open",
+                                      "N Kill Enemy to Open",
+                                      "S Kill Enemy to Open",
+                                      "Clear Quadrant to Open",
+                                      "Clear Full Tile to Open",
+
+                                      "NW Push Block to Open",
+                                      "NE Push Block to Open",
+                                      "SW Push Block to Open",
+                                      "SE Push Block to Open",
+                                      "W Push Block to Open",
+                                      "E Push Block to Open",
+                                      "N Push Block to Open",
+                                      "S Push Block to Open",
+                                      "Push Block to Open",
+                                      "Pull Lever to Open",
+                                      "Collect Prize to Open",
+
+                                      "Hold Switch Open Door",
+                                      "Toggle Switch to Open Door",
+                                      "Turn off Water",
+                                      "Turn on Water",
+                                      "Water Gate",
+                                      "Water Twin",
+                                      "Moving Wall Right",
+                                      "Moving Wall Left",
+                                      "Crash",
+                                      "Crash",
+                                      "Push Switch Exploding Wall",
+                                      "Holes 0",
+                                      "Open Chest (Holes 0)",
+                                      "Holes 1",
+                                      "Holes 2",
+                                      "Defeat Boss for Dungeon Prize",
+
+                                      "SE Kill Enemy to Push Block",
+                                      "Trigger Switch Chest",
+                                      "Pull Lever Exploding Wall",
+                                      "NW Kill Enemy for Chest",
+                                      "NE Kill Enemy for Chest",
+                                      "SW Kill Enemy for Chest",
+                                      "SE Kill Enemy for Chest",
+                                      "W Kill Enemy for Chest",
+                                      "E Kill Enemy for Chest",
+                                      "N Kill Enemy for Chest",
+                                      "S Kill Enemy for Chest",
+                                      "Clear Quadrant for Chest",
+                                      "Clear Full Tile for Chest",
+
+                                      "Light Torches to Open",
+                                      "Holes 3",
+                                      "Holes 4",
+                                      "Holes 5",
+                                      "Holes 6",
+                                      "Agahnim Room",
+                                      "Holes 7",
+                                      "Holes 8",
+                                      "Open Chest for Holes 8",
+                                      "Push Block for Chest",
+                                      "Clear Room for Triforce Door",
+                                      "Light Torches for Chest",
+                                      "Kill Boss Again"};
+
+static const std::string SecretItemNames[] = {
+    "Nothing",    "Green Rupee", "Rock hoarder",  "Bee",       "Health pack",
+    "Bomb",       "Heart ",      "Blue Rupee",
+
+    "Key",        "Arrow",       "Bomb",          "Heart",     "Magic",
+    "Full Magic", "Cucco",       "Green Soldier", "Bush Stal", "Blue Soldier",
+
+    "Landmine",   "Heart",       "Fairy",         "Heart",
+    "Nothing ",  // 22
+
+    "Hole",       "Warp",        "Staircase",     "Bombable",  "Switch"};
+
+static const std::string TileTypeNames[] = {
+    "$00 Nothing (standard floor)",
+    "$01 Collision",
+    "$02 Collision",
+    "$03 Collision",
+    "$04 Collision",
+    "$05 Nothing (unused?)",
+    "$06 Nothing (unused?)",
+    "$07 Nothing (unused?)",
+    "$08 Deep water",
+    "$09 Shallow water",
+    "$0A Unknown? Possibly unused",
+    "$0B Collision (different in Overworld and unknown)",
+    "$0C Overlay mask",
+    "$0D Spike floor",
+    "$0E GT ice",
+    "$0F Ice palace ice",
+    "$10 Slope ◤",
+    "$11 Slope ◥",
+    "$12 Slope ◣",
+    "$13 Slope ◢",
+    "$14 Nothing (unused?)",
+    "$15 Nothing (unused?)",
+    "$16 Nothing (unused?)",
+    "$17 Nothing (unused?)",
+    "$18 Slope ◤",
+    "$19 Slope ◥",
+    "$1A Slope ◣",
+    "$1B Slope ◢",
+    "$1C Layer 2 overlay",
+    "$1D North single-layer auto stairs",
+    "$1E North layer-swap auto stairs",
+    "$1F North layer-swap auto stairs",
+    "$20 Pit",
+    "$21 Nothing (unused?)",
+    "$22 Manual stairs",
+    "$23 Pot switch",
+    "$24 Pressure switch",
+    "$25 Nothing (unused but referenced by somaria blocks)",
+    "$26 Collision (near stairs?)",
+    "$27 Brazier/Fence/Statue/Block/General hookable things",
+    "$28 North ledge",
+    "$29 South ledge",
+    "$2A East ledge",
+    "$2B West ledge",
+    "$2C ◤ ledge",
+    "$2D ◣ ledge",
+    "$2E ◥ ledge",
+    "$2F ◢ ledge",
+    "$30 Straight inter-room stairs south/up 0",
+    "$31 Straight inter-room stairs south/up 1",
+    "$32 Straight inter-room stairs south/up 2",
+    "$33 Straight inter-room stairs south/up 3",
+    "$34 Straight inter-room stairs north/down 0",
+    "$35 Straight inter-room stairs north/down 1",
+    "$36 Straight inter-room stairs north/down 2",
+    "$37 Straight inter-room stairs north/down 3",
+    "$38 Straight inter-room stairs north/down edge",
+    "$39 Straight inter-room stairs south/up edge",
+    "$3A Star tile (inactive on load)",
+    "$3B Star tile (active on load)",
+    "$3C Nothing (unused?)",
+    "$3D South single-layer auto stairs",
+    "$3E South layer-swap auto stairs",
+    "$3F South layer-swap auto stairs",
+    "$40 Thick grass",
+    "$41 Nothing (unused?)",
+    "$42 Gravestone / Tower of hera ledge shadows??",
+    "$43 Skull Woods entrance/Hera columns???",
+    "$44 Spike",
+    "$45 Nothing (unused?)",
+    "$46 Desert Tablet",
+    "$47 Nothing (unused?)",
+    "$48 Diggable ground",
+    "$49 Nothing (unused?)",
+    "$4A Diggable ground",
+    "$4B Warp tile",
+    "$4C Nothing (unused?) | Something unknown in overworld",
+    "$4D Nothing (unused?) | Something unknown in overworld",
+    "$4E Square corners in EP overworld",
+    "$4F Square corners in EP overworld",
+    "$50 Green bush",
+    "$51 Dark bush",
+    "$52 Gray rock",
+    "$53 Black rock",
+    "$54 Hint tile/Sign",
+    "$55 Big gray rock",
+    "$56 Big black rock",
+    "$57 Bonk rocks",
+    "$58 Chest 0",
+    "$59 Chest 1",
+    "$5A Chest 2",
+    "$5B Chest 3",
+    "$5C Chest 4",
+    "$5D Chest 5",
+    "$5E Spiral stairs",
+    "$5F Spiral stairs",
+    "$60 Rupee tile",
+    "$61 Nothing (unused?)",
+    "$62 Bombable floor",
+    "$63 Minigame chest",
+    "$64 Nothing (unused?)",
+    "$65 Nothing (unused?)",
+    "$66 Crystal peg down",
+    "$67 Crystal peg up",
+    "$68 Upwards conveyor",
+    "$69 Downwards conveyor",
+    "$6A Leftwards conveyor",
+    "$6B Rightwards conveyor",
+    "$6C North vines",
+    "$6D South vines",
+    "$6E West vines",
+    "$6F East vines",
+    "$70 Pot/Hammer peg/Push block 00",
+    "$71 Pot/Hammer peg/Push block 01",
+    "$72 Pot/Hammer peg/Push block 02",
+    "$73 Pot/Hammer peg/Push block 03",
+    "$74 Pot/Hammer peg/Push block 04",
+    "$75 Pot/Hammer peg/Push block 05",
+    "$76 Pot/Hammer peg/Push block 06",
+    "$77 Pot/Hammer peg/Push block 07",
+    "$78 Pot/Hammer peg/Push block 08",
+    "$79 Pot/Hammer peg/Push block 09",
+    "$7A Pot/Hammer peg/Push block 0A",
+    "$7B Pot/Hammer peg/Push block 0B",
+    "$7C Pot/Hammer peg/Push block 0C",
+    "$7D Pot/Hammer peg/Push block 0D",
+    "$7E Pot/Hammer peg/Push block 0E",
+    "$7F Pot/Hammer peg/Push block 0F",
+    "$80 North/South door",
+    "$81 East/West door",
+    "$82 North/South shutter door",
+    "$83 East/West shutter door",
+    "$84 North/South layer 2 door",
+    "$85 East/West layer 2 door",
+    "$86 North/South layer 2 shutter door",
+    "$87 East/West layer 2 shutter door",
+    "$88 Some type of door (?)",
+    "$89 East/West transport door",
+    "$8A Some type of door (?)",
+    "$8B Some type of door (?)",
+    "$8C Some type of door (?)",
+    "$8D Some type of door (?)",
+    "$8E Entrance door",
+    "$8F Entrance door",
+    "$90 Layer toggle shutter door (?)",
+    "$91 Layer toggle shutter door (?)",
+    "$92 Layer toggle shutter door (?)",
+    "$93 Layer toggle shutter door (?)",
+    "$94 Layer toggle shutter door (?)",
+    "$95 Layer toggle shutter door (?)",
+    "$96 Layer toggle shutter door (?)",
+    "$97 Layer toggle shutter door (?)",
+    "$98 Layer+Dungeon toggle shutter door (?)",
+    "$99 Layer+Dungeon toggle shutter door (?)",
+    "$9A Layer+Dungeon toggle shutter door (?)",
+    "$9B Layer+Dungeon toggle shutter door (?)",
+    "$9C Layer+Dungeon toggle shutter door (?)",
+    "$9D Layer+Dungeon toggle shutter door (?)",
+    "$9E Layer+Dungeon toggle shutter door (?)",
+    "$9F Layer+Dungeon toggle shutter door (?)",
+    "$A0 North/South Dungeon swap door",
+    "$A1 Dungeon toggle door (?)",
+    "$A2 Dungeon toggle door (?)",
+    "$A3 Dungeon toggle door (?)",
+    "$A4 Dungeon toggle door (?)",
+    "$A5 Dungeon toggle door (?)",
+    "$A6 Nothing (unused?)",
+    "$A7 Nothing (unused?)",
+    "$A8 Layer+Dungeon toggle shutter door (?)",
+    "$A9 Layer+Dungeon toggle shutter door (?)",
+    "$AA Layer+Dungeon toggle shutter door (?)",
+    "$AB Layer+Dungeon toggle shutter door (?)",
+    "$AC Layer+Dungeon toggle shutter door (?)",
+    "$AD Layer+Dungeon toggle shutter door (?)",
+    "$AE Layer+Dungeon toggle shutter door (?)",
+    "$AF Layer+Dungeon toggle shutter door (?)",
+    "$B0 Somaria ─",
+    "$B1 Somaria │",
+    "$B2 Somaria ┌",
+    "$B3 Somaria └",
+    "$B4 Somaria ┐",
+    "$B5 Somaria ┘",
+    "$B6 Somaria ⍰ 1 way",
+    "$B7 Somaria ┬",
+    "$B8 Somaria ┴",
+    "$B9 Somaria ├",
+    "$BA Somaria ┤",
+    "$BB Somaria ┼",
+    "$BC Somaria ⍰ 2 way",
+    "$BD Somaria ┼ crossover",
+    "$BE Pipe entrance",
+    "$BF Nothing (unused?)",
+    "$C0 Torch 00",
+    "$C1 Torch 01",
+    "$C2 Torch 02",
+    "$C3 Torch 03",
+    "$C4 Torch 04",
+    "$C5 Torch 05",
+    "$C6 Torch 06",
+    "$C7 Torch 07",
+    "$C8 Torch 08",
+    "$C9 Torch 09",
+    "$CA Torch 0A",
+    "$CB Torch 0B",
+    "$CC Torch 0C",
+    "$CD Torch 0D",
+    "$CE Torch 0E",
+    "$CF Torch 0F",
+    "$D0 Nothing (unused?)",
+    "$D1 Nothing (unused?)",
+    "$D2 Nothing (unused?)",
+    "$D3 Nothing (unused?)",
+    "$D4 Nothing (unused?)",
+    "$D5 Nothing (unused?)",
+    "$D6 Nothing (unused?)",
+    "$D7 Nothing (unused?)",
+    "$D8 Nothing (unused?)",
+    "$D9 Nothing (unused?)",
+    "$DA Nothing (unused?)",
+    "$DB Nothing (unused?)",
+    "$DC Nothing (unused?)",
+    "$DD Nothing (unused?)",
+    "$DE Nothing (unused?)",
+    "$DF Nothing (unused?)",
+    "$E0 Nothing (unused?)",
+    "$E1 Nothing (unused?)",
+    "$E2 Nothing (unused?)",
+    "$E3 Nothing (unused?)",
+    "$E4 Nothing (unused?)",
+    "$E5 Nothing (unused?)",
+    "$E6 Nothing (unused?)",
+    "$E7 Nothing (unused?)",
+    "$E8 Nothing (unused?)",
+    "$E9 Nothing (unused?)",
+    "$EA Nothing (unused?)",
+    "$EB Nothing (unused?)",
+    "$EC Nothing (unused?)",
+    "$ED Nothing (unused?)",
+    "$EE Nothing (unused?)",
+    "$EF Nothing (unused?)",
+    "$F0 Door 0 bottom",
+    "$F1 Door 1 bottom",
+    "$F2 Door 2 bottom",
+    "$F3 Door 3 bottom",
+    "$F4 Door X bottom? (unused?)",
+    "$F5 Door X bottom? (unused?)",
+    "$F6 Door X bottom? (unused?)",
+    "$F7 Door X bottom? (unused?)",
+    "$F8 Door 0 top",
+    "$F9 Door 1 top",
+    "$FA Door 2 top",
+    "$FB Door 3 top",
+    "$FC Door X top? (unused?)",
+    "$FD Door X top? (unused?)",
+    "$FE Door X top? (unused?)",
+    "$FF Door X top? (unused?)"};
+
+static const std::string kSpriteDefaultNames[]{
+    "00 Raven",
+    "01 Vulture",
+    "02 Flying Stalfos Head",
+    "03 No Pointer (Empty",
+    "04 Pull Switch (good",
+    "05 Pull Switch (unused",
+    "06 Pull Switch (bad",
+    "07 Pull Switch (unused",
+    "08 Octorock (one way",
+    "09 Moldorm (Boss",
+    "0A Octorock (four way",
+    "0B Chicken",
+    "0C Octorock (?",
+    "0D Buzzblock",
+    "0E Snapdragon",
+    "0F Octoballoon",
+    "10 Octoballon Hatchlings",
+    "11 Hinox",
+    "12 Moblin",
+    "13 Mini Helmasaure",
+    "14 Gargoyle's Domain Gate",
+    "15 Antifairy",
+    "16 Sahasrahla / Aginah",
+    "17 Bush Hoarder",
+    "18 Mini Moldorm",
+    "19 Poe",
+    "1A Dwarves",
+    "1B Arrow in wall",
+    "1C Statue",
+    "1D Weathervane",
+    "1E Crystal Switch",
+    "1F Bug-Catching Kid",
+    "20 Sluggula",
+    "21 Push Switch",
+    "22 Ropa",
+    "23 Red Bari",
+    "24 Blue Bari",
+    "25 Talking Tree",
+    "26 Hardhat Beetle",
+    "27 Deadrock",
+    "28 Storytellers",
+    "29 Blind Hideout attendant",
+    "2A Sweeping Lady",
+    "2B Storytellers",
+    "2C Lumberjacks",
+    "2D Telepathic Stones",
+    "2E Multipurpose Sprite",
+    "2F Race Npc",
+    "30 Person?",
+    "31 Fortune Teller",
+    "32 Angry Brothers",
+    "33 Pull for items",
+    "34 Scared Girl",
+    "35 Innkeeper",
+    "36 Witch",
+    "37 Waterfall",
+    "38 Arrow Target",
+    "39 Average Middle",
+    "3A Half Magic Bat",
+    "3B Dash Item",
+    "3C Village Kid",
+    "3D Signs? Chicken lady also showed up / Scared ladies outside houses.",
+    "3E Rock Hoarder",
+    "3F Tutorial Soldier",
+    "40 Lightning Lock",
+    "41 Blue Sword Soldier / Used by guards to detect player",
+    "42 Green Sword Soldier",
+    "43 Red Spear Soldier",
+    "44 Assault Sword Soldier",
+    "45 Green Spear Soldier",
+    "46 Blue Archer",
+    "47 Green Archer",
+    "48 Red Javelin Soldier",
+    "49 Red Javelin Soldier 2",
+    "4A Red Bomb Soldiers",
+    "4B Green Soldier Recruits",
+    "4C Geldman",
+    "4D Rabbit",
+    "4E Popo",
+    "4F Popo 2",
+    "50 Cannon Balls",
+    "51 Armos",
+    "52 Giant Zora",
+    "53 Armos Knights (Boss",
+    "54 Lanmolas (Boss",
+    "55 Fireball Zora",
+    "56 Walking Zora",
+    "57 Desert Palace Barriers",
+    "58 Crab",
+    "59 Bird",
+    "5A Squirrel",
+    "5B Spark (Left to Right",
+    "5C Spark (Right to Left",
+    "5D Roller (vertical moving",
+    "5E Roller (vertical moving",
+    "5F Roller",
+    "60 Roller (horizontal moving",
+    "61 Beamos",
+    "62 Master Sword",
+    "63 Devalant (Non",
+    "64 Devalant (Shooter",
+    "65 Shooting Gallery Proprietor",
+    "66 Moving Cannon Ball Shooters (Right",
+    "67 Moving Cannon Ball Shooters (Left",
+    "68 Moving Cannon Ball Shooters (Down",
+    "69 Moving Cannon Ball Shooters (Up",
+    "6A Ball N' Chain Trooper",
+    "6B Cannon Soldier",
+    "6C Mirror Portal",
+    "6D Rat",
+    "6E Rope",
+    "6F Keese",
+    "70 Helmasaur King Fireball",
+    "71 Leever",
+    "72 Activator for the ponds (where you throw in items",
+    "73 Uncle / Priest",
+    "74 Running Man",
+    "75 Bottle Salesman",
+    "76 Princess Zelda",
+    "77 Antifairy (Alternate",
+    "78 Village Elder",
+    "79 Bee",
+    "7A Agahnim",
+    "7B Agahnim Energy Ball",
+    "7C Hyu",
+    "7D Big Spike Trap",
+    "7E Guruguru Bar (Clockwise",
+    "7F Guruguru Bar (Counter Clockwise",
+    "80 Winder",
+    "81 Water Tektite",
+    "82 Antifairy Circle",
+    "83 Green Eyegore",
+    "84 Red Eyegore",
+    "85 Yellow Stalfos",
+    "86 Kodongos",
+    "87 Flames",
+    "88 Mothula (Boss",
+    "89 Mothula's Beam",
+    "8A Spike Trap",
+    "8B Gibdo",
+    "8C Arrghus (Boss",
+    "8D Arrghus spawn",
+    "8E Terrorpin",
+    "8F Slime",
+    "90 Wallmaster",
+    "91 Stalfos Knight",
+    "92 Helmasaur King",
+    "93 Bumper",
+    "94 Swimmers",
+    "95 Eye Laser (Right",
+    "96 Eye Laser (Left",
+    "97 Eye Laser (Down",
+    "98 Eye Laser (Up",
+    "99 Pengator",
+    "9A Kyameron",
+    "9B Wizzrobe",
+    "9C Tadpoles",
+    "9D Tadpoles",
+    "9E Ostrich (Haunted Grove",
+    "9F Flute",
+    "A0 Birds (Haunted Grove",
+    "A1 Freezor",
+    "A2 Kholdstare (Boss",
+    "A3 Kholdstare's Shell",
+    "A4 Falling Ice",
+    "A5 Zazak Fireball",
+    "A6 Red Zazak",
+    "A7 Stalfos",
+    "A8 Bomber Flying Creatures from Darkworld",
+    "A9 Bomber Flying Creatures from Darkworld",
+    "AA Pikit",
+    "AB Maiden",
+    "AC Apple",
+    "AD Lost Old Man",
+    "AE Down Pipe",
+    "AF Up Pipe",
+    "B0 Right Pip",
+    "B1 Left Pipe",
+    "B2 Good bee again?",
+    "B3 Hylian Inscription",
+    "B4 Thief?s chest (not the one that follows you",
+    "B5 Bomb Salesman",
+    "B6 Kiki",
+    "B7 Maiden following you in Blind Dungeon",
+    "B8 Monologue Testing Sprite",
+    "B9 Feuding Friends on Death Mountain",
+    "BA Whirlpool",
+    "BB Salesman / chestgame guy / 300 rupee giver guy / Chest game thief",
+    "BC Drunk in the inn",
+    "BD Vitreous (Large Eyeball",
+    "BE Vitreous (Small Eyeball",
+    "BF Vitreous' Lightning",
+    "C0 Monster in Lake of Ill Omen / Quake Medallion",
+    "C1 Agahnim teleporting Zelda to dark world",
+    "C2 Boulders",
+    "C3 Gibo",
+    "C4 Thief",
+    "C5 Medusa",
+    "C6 Four Way Fireball Spitters (spit when you use your sword",
+    "C7 Hokku",
+    "C8 Big Fairy who heals you",
+    "C9 Tektite",
+    "CA Chain Chomp",
+    "CB Trinexx",
+    "CC Another part of trinexx",
+    "CD Yet another part of trinexx",
+    "CE Blind The Thief (Boss)",
+    "CF Swamola",
+    "D0 Lynel",
+    "D1 Bunny Beam",
+    "D2 Flopping fish",
+    "D3 Stal",
+    "D4 Landmine",
+    "D5 Digging Game Proprietor",
+    "D6 Ganon",
+    "D7 Copy of Ganon",
+    "D8 Heart",
+    "D9 Green Rupee",
+    "DA Blue Rupee",
+    "DB Red Rupee",
+    "DC Bomb Refill (1)",
+    "DD Bomb Refill (4)",
+    "DE Bomb Refill (8)",
+    "DF Small Magic Refill",
+    "E0 Full Magic Refill",
+    "E1 Arrow Refill (5)",
+    "E2 Arrow Refill (10)",
+    "E3 Fairy",
+    "E4 Key",
+    "E5 Big Key",
+    "E6 Shield",
+    "E7 Mushroom",
+    "E8 Fake Master Sword",
+    "E9 Magic Shop dude / His items",
+    "EA Heart Container",
+    "EB Heart Piece",
+    "EC Bushes",
+    "ED Cane Of Somaria Platform",
+    "EE Mantle",
+    "EF Cane of Somaria Platform (Unused)",
+    "F0 Cane of Somaria Platform (Unused)",
+    "F1 Cane of Somaria Platform (Unused)",
+    "F2 Medallion Tablet",
+    "F3",
+    "F4 Falling Rocks",
+    "F5",
+    "F6",
+    "F7",
+    "F8",
+    "F9",
+    "FA",
+    "FB",
+    "FC",
+    "FD",
+    "FE",
+    "FF",
+};
+
+static const std::string overlordnames[] = {
+    "Overlord_SpritePositionTarget",
+    "Overlord_AllDirectionMetalBallFactory",
+    "Overlord_CascadeMetalBallFactory",
+    "Overlord_StalfosFactory",
+    "Overlord_StalfosTrap",
+    "Overlord_SnakeTrap",
+    "Overlord_MovingFloor",
+    "Overlord_ZolFactory",
+    "Overlord_WallMasterFactory",
+    "Overlord_CrumbleTilePath 1",
+    "Overlord_CrumbleTilePath 2",
+    "Overlord_CrumbleTilePath 3",
+    "Overlord_CrumbleTilePath 4",
+    "Overlord_CrumbleTilePath 5",
+    "Overlord_CrumbleTilePath 6",
+    "Overlord_PirogusuFactory 1",
+    "Overlord_PirogusuFactory 2",
+    "Overlord_PirogusuFactory 3",
+    "Overlord_PirogusuFactory 4",
+    "Overlord_FlyingTileFactory",
+    "Overlord_WizzrobeFactory",
+    "Overlord_ZoroFactory",
+    "Overlord_StalfosTrapTriggerWindow",
+    "Overlord_RedStalfosTrap",
+    "Overlord_ArmosCoordinator",
+    "Overlord_BombTrap",
+};
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/core/controller.cc

@@ -0,0 +1,583 @@
+#include "controller.h"
+
+#include <SDL.h>
+
+#include "imgui/backends/imgui_impl_sdl2.h"
+#include "imgui/backends/imgui_impl_sdlrenderer2.h"
+#include "imgui/imgui.h"
+#include "imgui/imgui_internal.h"
+
+#if defined(__APPLE__) && defined(__MACH__)
+#include <TargetConditionals.h>
+#if TARGET_IPHONE_SIMULATOR == 1
+#include "imgui/backends/imgui_impl_metal.h"
+#elif TARGET_OS_IPHONE == 1
+#include "imgui/backends/imgui_impl_metal.h"
+#elif TARGET_OS_MAC == 1
+
+#endif
+#endif
+
+#include <memory>
+
+#include "absl/status/status.h"
+#include "absl/strings/str_format.h"
+#include "app/core/platform/font_loader.h"
+#include "app/editor/master_editor.h"
+#include "app/gui/icons.h"
+#include "app/gui/style.h"
+
+namespace yaze {
+namespace app {
+namespace core {
+
+namespace {
+
+constexpr ImGuiWindowFlags kMainEditorFlags =
+    ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoCollapse |
+    ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_MenuBar |
+    ImGuiWindowFlags_NoBringToFrontOnFocus | ImGuiWindowFlags_NoTitleBar;
+
+using ::ImVec2;
+using ImGui::Begin;
+using ImGui::End;
+using ImGui::GetIO;
+using ImGui::NewFrame;
+using ImGui::SetNextWindowPos;
+using ImGui::SetNextWindowSize;
+
+void NewMasterFrame() {
+  const ImGuiIO &io = GetIO();
+  ImGui_ImplSDLRenderer2_NewFrame();
+  ImGui_ImplSDL2_NewFrame();
+  NewFrame();
+  SetNextWindowPos(gui::kZeroPos);
+  ImVec2 dimensions(io.DisplaySize.x, io.DisplaySize.y);
+  SetNextWindowSize(dimensions, ImGuiCond_Always);
+
+  if (!Begin("##YazeMain", nullptr, kMainEditorFlags)) {
+    End();
+    return;
+  }
+}
+
+void InitializeKeymap() {
+  ImGuiIO &io = ImGui::GetIO();
+  io.KeyMap[ImGuiKey_LeftSuper] = SDL_GetScancodeFromKey(SDLK_LGUI);
+  io.KeyMap[ImGuiKey_Backspace] = SDL_GetScancodeFromKey(SDLK_BACKSPACE);
+  io.KeyMap[ImGuiKey_LeftShift] = SDL_GetScancodeFromKey(SDLK_LSHIFT);
+  io.KeyMap[ImGuiKey_Enter] = SDL_GetScancodeFromKey(SDLK_RETURN);
+  io.KeyMap[ImGuiKey_UpArrow] = SDL_GetScancodeFromKey(SDLK_UP);
+  io.KeyMap[ImGuiKey_DownArrow] = SDL_GetScancodeFromKey(SDLK_DOWN);
+  io.KeyMap[ImGuiKey_LeftArrow] = SDL_GetScancodeFromKey(SDLK_LEFT);
+  io.KeyMap[ImGuiKey_RightArrow] = SDL_GetScancodeFromKey(SDLK_RIGHT);
+  io.KeyMap[ImGuiKey_Delete] = SDL_GetScancodeFromKey(SDLK_DELETE);
+  io.KeyMap[ImGuiKey_Escape] = SDL_GetScancodeFromKey(SDLK_ESCAPE);
+  io.KeyMap[ImGuiKey_Tab] = SDL_GetScancodeFromKey(SDLK_TAB);
+  io.KeyMap[ImGuiKey_LeftCtrl] = SDL_GetScancodeFromKey(SDLK_LCTRL);
+  io.KeyMap[ImGuiKey_PageUp] = SDL_GetScancodeFromKey(SDLK_PAGEUP);
+  io.KeyMap[ImGuiKey_PageDown] = SDL_GetScancodeFromKey(SDLK_PAGEDOWN);
+  io.KeyMap[ImGuiKey_Home] = SDL_GetScancodeFromKey(SDLK_HOME);
+  io.KeyMap[ImGuiKey_Space] = SDL_GetScancodeFromKey(SDLK_SPACE);
+  io.KeyMap[ImGuiKey_1] = SDL_GetScancodeFromKey(SDLK_1);
+  io.KeyMap[ImGuiKey_2] = SDL_GetScancodeFromKey(SDLK_2);
+  io.KeyMap[ImGuiKey_3] = SDL_GetScancodeFromKey(SDLK_3);
+  io.KeyMap[ImGuiKey_4] = SDL_GetScancodeFromKey(SDLK_4);
+  io.KeyMap[ImGuiKey_5] = SDL_GetScancodeFromKey(SDLK_5);
+  io.KeyMap[ImGuiKey_6] = SDL_GetScancodeFromKey(SDLK_6);
+  io.KeyMap[ImGuiKey_7] = SDL_GetScancodeFromKey(SDLK_7);
+  io.KeyMap[ImGuiKey_8] = SDL_GetScancodeFromKey(SDLK_8);
+  io.KeyMap[ImGuiKey_9] = SDL_GetScancodeFromKey(SDLK_9);
+  io.KeyMap[ImGuiKey_0] = SDL_GetScancodeFromKey(SDLK_0);
+  io.KeyMap[ImGuiKey_A] = SDL_GetScancodeFromKey(SDLK_a);
+  io.KeyMap[ImGuiKey_B] = SDL_GetScancodeFromKey(SDLK_b);
+  io.KeyMap[ImGuiKey_C] = SDL_GetScancodeFromKey(SDLK_c);
+  io.KeyMap[ImGuiKey_D] = SDL_GetScancodeFromKey(SDLK_d);
+  io.KeyMap[ImGuiKey_E] = SDL_GetScancodeFromKey(SDLK_e);
+  io.KeyMap[ImGuiKey_F] = SDL_GetScancodeFromKey(SDLK_f);
+  io.KeyMap[ImGuiKey_G] = SDL_GetScancodeFromKey(SDLK_g);
+  io.KeyMap[ImGuiKey_H] = SDL_GetScancodeFromKey(SDLK_h);
+  io.KeyMap[ImGuiKey_I] = SDL_GetScancodeFromKey(SDLK_i);
+  io.KeyMap[ImGuiKey_J] = SDL_GetScancodeFromKey(SDLK_j);
+  io.KeyMap[ImGuiKey_K] = SDL_GetScancodeFromKey(SDLK_k);
+  io.KeyMap[ImGuiKey_L] = SDL_GetScancodeFromKey(SDLK_l);
+  io.KeyMap[ImGuiKey_M] = SDL_GetScancodeFromKey(SDLK_m);
+  io.KeyMap[ImGuiKey_N] = SDL_GetScancodeFromKey(SDLK_n);
+  io.KeyMap[ImGuiKey_O] = SDL_GetScancodeFromKey(SDLK_o);
+  io.KeyMap[ImGuiKey_P] = SDL_GetScancodeFromKey(SDLK_p);
+  io.KeyMap[ImGuiKey_Q] = SDL_GetScancodeFromKey(SDLK_q);
+  io.KeyMap[ImGuiKey_R] = SDL_GetScancodeFromKey(SDLK_r);
+  io.KeyMap[ImGuiKey_S] = SDL_GetScancodeFromKey(SDLK_s);
+  io.KeyMap[ImGuiKey_T] = SDL_GetScancodeFromKey(SDLK_t);
+  io.KeyMap[ImGuiKey_U] = SDL_GetScancodeFromKey(SDLK_u);
+  io.KeyMap[ImGuiKey_V] = SDL_GetScancodeFromKey(SDLK_v);
+  io.KeyMap[ImGuiKey_W] = SDL_GetScancodeFromKey(SDLK_w);
+  io.KeyMap[ImGuiKey_X] = SDL_GetScancodeFromKey(SDLK_x);
+  io.KeyMap[ImGuiKey_Y] = SDL_GetScancodeFromKey(SDLK_y);
+  io.KeyMap[ImGuiKey_Z] = SDL_GetScancodeFromKey(SDLK_z);
+  io.KeyMap[ImGuiKey_F1] = SDL_GetScancodeFromKey(SDLK_F1);
+  io.KeyMap[ImGuiKey_F2] = SDL_GetScancodeFromKey(SDLK_F2);
+  io.KeyMap[ImGuiKey_F3] = SDL_GetScancodeFromKey(SDLK_F3);
+  io.KeyMap[ImGuiKey_F4] = SDL_GetScancodeFromKey(SDLK_F4);
+  io.KeyMap[ImGuiKey_F5] = SDL_GetScancodeFromKey(SDLK_F5);
+  io.KeyMap[ImGuiKey_F6] = SDL_GetScancodeFromKey(SDLK_F6);
+  io.KeyMap[ImGuiKey_F7] = SDL_GetScancodeFromKey(SDLK_F7);
+  io.KeyMap[ImGuiKey_F8] = SDL_GetScancodeFromKey(SDLK_F8);
+  io.KeyMap[ImGuiKey_F9] = SDL_GetScancodeFromKey(SDLK_F9);
+  io.KeyMap[ImGuiKey_F10] = SDL_GetScancodeFromKey(SDLK_F10);
+  io.KeyMap[ImGuiKey_F11] = SDL_GetScancodeFromKey(SDLK_F11);
+  io.KeyMap[ImGuiKey_F12] = SDL_GetScancodeFromKey(SDLK_F12);
+}
+
+void ImGui_ImplSDL2_SetClipboardText(void *user_data, const char *text) {
+  SDL_SetClipboardText(text);
+}
+
+const char *ImGui_ImplSDL2_GetClipboardText(void *user_data) {
+  return SDL_GetClipboardText();
+}
+
+void InitializeClipboard() {
+  ImGuiIO &io = ImGui::GetIO();
+  io.SetClipboardTextFn = ImGui_ImplSDL2_SetClipboardText;
+  io.GetClipboardTextFn = ImGui_ImplSDL2_GetClipboardText;
+  io.ClipboardUserData = nullptr;
+}
+
+void HandleKeyDown(SDL_Event &event, editor::MasterEditor &editor) {
+  ImGuiIO &io = ImGui::GetIO();
+  io.KeysDown[event.key.keysym.scancode] = (event.type == SDL_KEYDOWN);
+  io.KeyShift = ((SDL_GetModState() & KMOD_SHIFT) != 0);
+  io.KeyCtrl = ((SDL_GetModState() & KMOD_CTRL) != 0);
+  io.KeyAlt = ((SDL_GetModState() & KMOD_ALT) != 0);
+  io.KeySuper = ((SDL_GetModState() & KMOD_GUI) != 0);
+
+  switch (event.key.keysym.sym) {
+    case SDLK_BACKSPACE:
+    case SDLK_LSHIFT:
+    case SDLK_LCTRL:
+    case SDLK_TAB:
+      io.KeysDown[event.key.keysym.scancode] = (event.type == SDL_KEYDOWN);
+      break;
+    case SDLK_z:
+      editor.emulator().snes().SetButtonState(1, 0, true);
+      break;
+    case SDLK_a:
+      editor.emulator().snes().SetButtonState(1, 1, true);
+      break;
+    case SDLK_RSHIFT:
+      editor.emulator().snes().SetButtonState(1, 2, true);
+      break;
+    case SDLK_RETURN:
+      editor.emulator().snes().SetButtonState(1, 3, true);
+      break;
+    case SDLK_UP:
+      editor.emulator().snes().SetButtonState(1, 4, true);
+      break;
+    case SDLK_DOWN:
+      editor.emulator().snes().SetButtonState(1, 5, true);
+      break;
+    case SDLK_LEFT:
+      editor.emulator().snes().SetButtonState(1, 6, true);
+      break;
+    case SDLK_RIGHT:
+      editor.emulator().snes().SetButtonState(1, 7, true);
+      break;
+    case SDLK_x:
+      editor.emulator().snes().SetButtonState(1, 8, true);
+      break;
+    case SDLK_s:
+      editor.emulator().snes().SetButtonState(1, 9, true);
+      break;
+    case SDLK_d:
+      editor.emulator().snes().SetButtonState(1, 10, true);
+      break;
+    case SDLK_c:
+      editor.emulator().snes().SetButtonState(1, 11, true);
+      break;
+    default:
+      break;
+  }
+}
+
+void HandleKeyUp(SDL_Event &event, editor::MasterEditor &editor) {
+  ImGuiIO &io = ImGui::GetIO();
+  int key = event.key.keysym.scancode;
+  IM_ASSERT(key >= 0 && key < IM_ARRAYSIZE(io.KeysDown));
+  io.KeysDown[key] = (event.type == SDL_KEYDOWN);
+  io.KeyShift = ((SDL_GetModState() & KMOD_SHIFT) != 0);
+  io.KeyCtrl = ((SDL_GetModState() & KMOD_CTRL) != 0);
+  io.KeyAlt = ((SDL_GetModState() & KMOD_ALT) != 0);
+  io.KeySuper = ((SDL_GetModState() & KMOD_GUI) != 0);
+
+  switch (event.key.keysym.sym) {
+    case SDLK_z:
+      editor.emulator().snes().SetButtonState(1, 0, false);
+      break;
+    case SDLK_a:
+      editor.emulator().snes().SetButtonState(1, 1, false);
+      break;
+    case SDLK_RSHIFT:
+      editor.emulator().snes().SetButtonState(1, 2, false);
+      break;
+    case SDLK_RETURN:
+      editor.emulator().snes().SetButtonState(1, 3, false);
+      break;
+    case SDLK_UP:
+      editor.emulator().snes().SetButtonState(1, 4, false);
+      break;
+    case SDLK_DOWN:
+      editor.emulator().snes().SetButtonState(1, 5, false);
+      break;
+    case SDLK_LEFT:
+      editor.emulator().snes().SetButtonState(1, 6, false);
+      break;
+    case SDLK_RIGHT:
+      editor.emulator().snes().SetButtonState(1, 7, false);
+      break;
+    case SDLK_x:
+      editor.emulator().snes().SetButtonState(1, 8, false);
+      break;
+    case SDLK_s:
+      editor.emulator().snes().SetButtonState(1, 9, false);
+      break;
+    case SDLK_d:
+      editor.emulator().snes().SetButtonState(1, 10, false);
+      break;
+    case SDLK_c:
+      editor.emulator().snes().SetButtonState(1, 11, false);
+      break;
+    default:
+      break;
+  }
+}
+
+void ChangeWindowSizeEvent(SDL_Event &event) {
+  ImGuiIO &io = ImGui::GetIO();
+  io.DisplaySize.x = static_cast<float>(event.window.data1);
+  io.DisplaySize.y = static_cast<float>(event.window.data2);
+}
+
+void HandleMouseMovement(int &wheel) {
+  ImGuiIO &io = ImGui::GetIO();
+  int mouseX;
+  int mouseY;
+  const int buttons = SDL_GetMouseState(&mouseX, &mouseY);
+
+  io.DeltaTime = 1.0f / 60.0f;
+  io.MousePos = ImVec2(static_cast<float>(mouseX), static_cast<float>(mouseY));
+  io.MouseDown[0] = buttons & SDL_BUTTON(SDL_BUTTON_LEFT);
+  io.MouseDown[1] = buttons & SDL_BUTTON(SDL_BUTTON_RIGHT);
+  io.MouseDown[2] = buttons & SDL_BUTTON(SDL_BUTTON_MIDDLE);
+  io.MouseWheel = static_cast<float>(wheel);
+}
+
+}  // namespace
+
+absl::Status Controller::OnEntry(std::string filename) {
+#if defined(__APPLE__) && defined(__MACH__)
+#if TARGET_IPHONE_SIMULATOR == 1
+  /* iOS in Xcode simulator */
+  platform_ = Platform::kiOS;
+#elif TARGET_OS_IPHONE == 1
+  /* iOS */
+  platform_ = Platform::kiOS;
+#elif TARGET_OS_MAC == 1
+  /* macOS */
+  platform_ = Platform::kMacOS;
+#endif
+#elif defined(_WIN32)
+  platform_ = Platform::kWindows;
+#elif defined(__linux__)
+  platform_ = Platform::kLinux;
+#else
+  platform_ = Platform::kUnknown;
+#endif
+
+  RETURN_IF_ERROR(CreateSDL_Window())
+  RETURN_IF_ERROR(CreateRenderer())
+  RETURN_IF_ERROR(CreateGuiContext())
+  if (flags()->kLoadAudioDevice) {
+    RETURN_IF_ERROR(LoadAudioDevice())
+    master_editor_.emulator().set_audio_buffer(audio_buffer_);
+    master_editor_.emulator().set_audio_device_id(audio_device_);
+  }
+  InitializeKeymap();
+  master_editor_.SetupScreen(renderer_, filename);
+  active_ = true;
+  return absl::OkStatus();
+}
+
+void Controller::OnInput() {
+  int wheel = 0;
+  SDL_Event event;
+  ImGuiIO &io = ImGui::GetIO();
+
+  while (SDL_PollEvent(&event)) {
+    switch (event.type) {
+      case SDL_KEYDOWN:
+        HandleKeyDown(event, master_editor_);
+        break;
+      case SDL_KEYUP:
+        HandleKeyUp(event, master_editor_);
+        break;
+      case SDL_TEXTINPUT:
+        io.AddInputCharactersUTF8(event.text.text);
+        break;
+      case SDL_MOUSEWHEEL:
+        wheel = event.wheel.y;
+        break;
+      case SDL_WINDOWEVENT:
+        switch (event.window.event) {
+          case SDL_WINDOWEVENT_CLOSE:
+            CloseWindow();
+            break;
+          case SDL_WINDOWEVENT_SIZE_CHANGED:
+            ChangeWindowSizeEvent(event);
+            break;
+          default:
+            break;
+        }
+        break;
+      default:
+        break;
+    }
+  }
+
+  HandleMouseMovement(wheel);
+}
+
+absl::Status Controller::OnLoad() {
+  if (master_editor_.quit()) {
+    active_ = false;
+  }
+  NewMasterFrame();
+  RETURN_IF_ERROR(master_editor_.Update());
+  return absl::OkStatus();
+}
+
+void Controller::DoRender() const {
+  ImGui::Render();
+  SDL_RenderClear(renderer_.get());
+  ImGui_ImplSDLRenderer2_RenderDrawData(ImGui::GetDrawData(), renderer_.get());
+  SDL_RenderPresent(renderer_.get());
+}
+
+void Controller::OnExit() {
+  ImGui::DestroyContext();
+  if (flags()->kLoadAudioDevice) {
+    SDL_PauseAudioDevice(audio_device_, 1);
+    SDL_CloseAudioDevice(audio_device_);
+    delete audio_buffer_;
+  }
+  switch (platform_) {
+    case Platform::kMacOS:
+    case Platform::kWindows:
+    case Platform::kLinux:
+      ImGui_ImplSDLRenderer2_Shutdown();
+      ImGui_ImplSDL2_Shutdown();
+      break;
+    case Platform::kiOS:
+      // Deferred
+      break;
+    default:
+      break;
+  }
+  ImGui::DestroyContext();
+  SDL_Quit();
+}
+
+absl::Status Controller::CreateSDL_Window() {
+  auto sdl_flags = SDL_INIT_VIDEO | SDL_INIT_TIMER;
+  if (flags()->kUseNewImGuiInput) {
+    sdl_flags |= SDL_INIT_GAMECONTROLLER;
+  }
+
+  if (flags()->kLoadAudioDevice) {
+    sdl_flags |= SDL_INIT_AUDIO;
+  }
+
+  if (SDL_Init(sdl_flags) != 0) {
+    return absl::InternalError(
+        absl::StrFormat("SDL_Init: %s\n", SDL_GetError()));
+  } else {
+    SDL_DisplayMode displayMode;
+    SDL_GetCurrentDisplayMode(0, &displayMode);
+    int screenWidth = displayMode.w * 0.8;
+    int screenHeight = displayMode.h * 0.8;
+
+    window_ = std::unique_ptr<SDL_Window, sdl_deleter>(
+        SDL_CreateWindow("Yet Another Zelda3 Editor",  // window title
+                         SDL_WINDOWPOS_UNDEFINED,      // initial x position
+                         SDL_WINDOWPOS_UNDEFINED,      // initial y position
+                         screenWidth,                  // width, in pixels
+                         screenHeight,                 // height, in pixels
+                         SDL_WINDOW_RESIZABLE),
+        sdl_deleter());
+    if (window_ == nullptr) {
+      return absl::InternalError(
+          absl::StrFormat("SDL_CreateWindow: %s\n", SDL_GetError()));
+    }
+  }
+  return absl::OkStatus();
+}
+
+absl::Status Controller::CreateRenderer() {
+  renderer_ = std::unique_ptr<SDL_Renderer, sdl_deleter>(
+      SDL_CreateRenderer(window_.get(), -1,
+                         SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
+      sdl_deleter());
+  if (renderer_ == nullptr) {
+    return absl::InternalError(
+        absl::StrFormat("SDL_CreateRenderer: %s\n", SDL_GetError()));
+  } else {
+    SDL_SetRenderDrawBlendMode(renderer_.get(), SDL_BLENDMODE_BLEND);
+    SDL_SetRenderDrawColor(renderer_.get(), 0x00, 0x00, 0x00, 0x00);
+  }
+  return absl::OkStatus();
+}
+
+absl::Status Controller::CreateGuiContext() {
+  IMGUI_CHECKVERSION();
+  ImGui::CreateContext();
+
+  ImGuiIO &io = ImGui::GetIO();
+  io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
+
+  if (flags()->kUseNewImGuiInput) {
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
+  }
+
+  // Initialize ImGui for SDL
+  ImGui_ImplSDL2_InitForSDLRenderer(window_.get(), renderer_.get());
+  ImGui_ImplSDLRenderer2_Init(renderer_.get());
+
+  if (flags()->kLoadSystemFonts) {
+    LoadSystemFonts();
+  } else {
+    RETURN_IF_ERROR(LoadFontFamilies());
+  }
+
+  // Set the default style
+  gui::ColorsYaze();
+
+  // Build a new ImGui frame
+  ImGui_ImplSDLRenderer2_NewFrame();
+  ImGui_ImplSDL2_NewFrame();
+
+  return absl::OkStatus();
+}
+
+absl::Status Controller::LoadFontFamilies() const {
+  ImGuiIO &io = ImGui::GetIO();
+
+  const char *font_path = "assets/font/";
+  static const char *KARLA_REGULAR = "Karla-Regular.ttf";
+  static const char *ROBOTO_MEDIUM = "Roboto-Medium.ttf";
+  static const char *COUSINE_REGULAR = "Cousine-Regular.ttf";
+  static const char *DROID_SANS = "DroidSans.ttf";
+  static const char *NOTO_SANS_JP = "NotoSansJP.ttf";
+  static const char *IBM_PLEX_JP = "IBMPlexSansJP-Bold.ttf";
+  static const float FONT_SIZE_DEFAULT = 14.0f;
+  static const float FONT_SIZE_DROID_SANS = 16.0f;
+  static const float ICON_FONT_SIZE = 18.0f;
+
+  // Icon configuration
+  static const ImWchar icons_ranges[] = {ICON_MIN_MD, 0xf900, 0};
+  ImFontConfig icons_config;
+  icons_config.MergeMode = true;
+  icons_config.GlyphOffset.y = 5.0f;
+  icons_config.GlyphMinAdvanceX = 13.0f;
+  icons_config.PixelSnapH = true;
+
+  // Japanese font configuration
+  ImFontConfig japanese_font_config;
+  japanese_font_config.MergeMode = true;
+  icons_config.GlyphOffset.y = 5.0f;
+  icons_config.GlyphMinAdvanceX = 13.0f;
+  icons_config.PixelSnapH = true;
+
+  // List of fonts to be loaded
+  std::vector<const char *> font_paths = {KARLA_REGULAR, ROBOTO_MEDIUM,
+                                          COUSINE_REGULAR, IBM_PLEX_JP};
+
+  // Load fonts with associated icon and Japanese merges
+  for (const auto &font_path : font_paths) {
+    float font_size =
+        (font_path == DROID_SANS) ? FONT_SIZE_DROID_SANS : FONT_SIZE_DEFAULT;
+
+    std::string actual_font_path;
+#ifdef __APPLE__
+#if TARGET_OS_IOS == 1
+    const std::string kBundlePath = GetBundleResourcePath();
+    actual_font_path = kBundlePath + font_path;
+#else
+    actual_font_path = std::filesystem::absolute(font_path).string();
+#endif
+#else
+    actual_font_path = font_path;
+#endif
+
+    if (!io.Fonts->AddFontFromFileTTF(actual_font_path.data(), font_size)) {
+      return absl::InternalError(
+          absl::StrFormat("Failed to load font from %s", actual_font_path));
+    }
+
+    // Merge icon set
+    std::string actual_icon_font_path = "";
+    const char *icon_font_path = FONT_ICON_FILE_NAME_MD;
+#if defined(__APPLE__) && defined(__MACH__)
+#if TARGET_OS_IOS == 1
+    const std::string kIconBundlePath = GetBundleResourcePath();
+    actual_icon_font_path = kIconBundlePath + "MaterialIcons-Regular.ttf";
+#else
+    actual_icon_font_path = std::filesystem::absolute(icon_font_path).string();
+#endif
+#else
+#endif
+    io.Fonts->AddFontFromFileTTF(actual_icon_font_path.data(), ICON_FONT_SIZE,
+                                 &icons_config, icons_ranges);
+
+    // Merge Japanese font
+    std::string actual_japanese_font_path = "";
+    const char *japanese_font_path = NOTO_SANS_JP;
+#if defined(__APPLE__) && defined(__MACH__)
+#if TARGET_OS_IOS == 1
+    const std::string kJapaneseBundlePath = GetBundleResourcePath();
+    actual_japanese_font_path = kJapaneseBundlePath + japanese_font_path;
+#else
+    actual_japanese_font_path =
+        std::filesystem::absolute(japanese_font_path).string();
+#endif
+#else
+#endif
+    io.Fonts->AddFontFromFileTTF(actual_japanese_font_path.data(), 18.0f,
+                                 &japanese_font_config,
+                                 io.Fonts->GetGlyphRangesJapanese());
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status Controller::LoadAudioDevice() {
+  SDL_AudioSpec want, have;
+  SDL_memset(&want, 0, sizeof(want));
+  want.freq = audio_frequency_;
+  want.format = AUDIO_S16;
+  want.channels = 2;
+  want.samples = 2048;
+  want.callback = NULL;  // Uses the queue
+  audio_device_ = SDL_OpenAudioDevice(NULL, 0, &want, &have, 0);
+  if (audio_device_ == 0) {
+    return absl::InternalError(
+        absl::StrFormat("Failed to open audio: %s\n", SDL_GetError()));
+  }
+  audio_buffer_ = new int16_t[audio_frequency_ / 50 * 4];
+  master_editor_.emulator().set_audio_buffer(audio_buffer_);
+  SDL_PauseAudioDevice(audio_device_, 0);
+  return absl::OkStatus();
+}
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze

src/app/core/controller.h

@@ -0,0 +1,85 @@
+#ifndef YAZE_APP_CORE_CONTROLLER_H
+#define YAZE_APP_CORE_CONTROLLER_H
+
+#include <SDL.h>
+#include "imgui/backends/imgui_impl_sdl2.h"
+#include "imgui/backends/imgui_impl_sdlrenderer2.h"
+#include "imgui/imconfig.h"
+#include "imgui/imgui.h"
+#include "imgui/imgui_internal.h"
+
+#include <memory>
+
+#include "absl/status/status.h"
+#include "app/core/common.h"
+#include "app/editor/master_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gui/icons.h"
+#include "app/gui/style.h"
+
+int main(int argc, char **argv);
+
+namespace yaze {
+namespace app {
+namespace core {
+
+enum class Platform { kUnknown, kMacOS, kiOS, kWindows, kLinux };
+
+/**
+ * @brief Main controller for the application.
+ *
+ * This class is responsible for managing the main window and the
+ * main editor. It is the main entry point for the application.
+ */
+class Controller : public ExperimentFlags {
+ public:
+  bool IsActive() const { return active_; }
+  absl::Status OnEntry(std::string filename = "");
+  void OnInput();
+  absl::Status OnLoad();
+  void DoRender() const;
+  void OnExit();
+
+  absl::Status CreateSDL_Window();
+  absl::Status CreateRenderer();
+  absl::Status CreateGuiContext();
+  absl::Status LoadFontFamilies() const;
+  absl::Status LoadAudioDevice();
+
+  auto master_editor() -> editor::MasterEditor & { return master_editor_; }
+
+ private:
+  struct sdl_deleter {
+    void operator()(SDL_Window *p) const {
+      if (p) {
+        SDL_DestroyWindow(p);
+      }
+    }
+    void operator()(SDL_Renderer *p) const {
+      if (p) {
+        SDL_DestroyRenderer(p);
+      }
+    }
+    void operator()(SDL_Texture *p) const { SDL_DestroyTexture(p); }
+  };
+
+  void CloseWindow() { active_ = false; }
+
+  friend int ::main(int argc, char **argv);
+
+  bool active_;
+  Platform platform_;
+  editor::MasterEditor master_editor_;
+
+  int audio_frequency_ = 48000;
+  int16_t *audio_buffer_;
+  SDL_AudioDeviceID audio_device_;
+  std::shared_ptr<SDL_Window> window_;
+  std::shared_ptr<SDL_Renderer> renderer_;
+};
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_CORE_CONTROLLER_H

src/app/core/labeling.cc

@@ -0,0 +1,141 @@
+#include "app/core/labeling.h"
+
+#include "imgui/imgui.h"
+#include "imgui/misc/cpp/imgui_stdlib.h"
+
+#include <cstdint>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "app/core/common.h"
+#include "app/core/constants.h"
+#include "app/gui/icons.h"
+
+namespace yaze {
+namespace app {
+namespace core {
+
+bool ResourceLabelManager::LoadLabels(const std::string& filename) {
+  std::ifstream file(filename);
+  if (!file.is_open()) {
+    // Create the file if it does not exist
+    std::ofstream create_file(filename);
+    if (!create_file.is_open()) {
+      return false;
+    }
+    create_file.close();
+    file.open(filename);
+    if (!file.is_open()) {
+      return false;
+    }
+  }
+  filename_ = filename;
+
+  std::string line;
+  while (std::getline(file, line)) {
+    std::istringstream iss(line);
+    std::string type, key, value;
+    if (std::getline(iss, type, ',') && std::getline(iss, key, ',') &&
+        std::getline(iss, value)) {
+      labels_[type][key] = value;
+    }
+  }
+  labels_loaded_ = true;
+  return true;
+}
+
+bool ResourceLabelManager::SaveLabels() {
+  if (!labels_loaded_) {
+    return false;
+  }
+  std::ofstream file(filename_);
+  if (!file.is_open()) {
+    return false;
+  }
+  for (const auto& type_pair : labels_) {
+    for (const auto& label_pair : type_pair.second) {
+      file << type_pair.first << "," << label_pair.first << ","
+           << label_pair.second << std::endl;
+    }
+  }
+  file.close();
+  return true;
+}
+
+void ResourceLabelManager::DisplayLabels(bool* p_open) {
+  if (!labels_loaded_) {
+    ImGui::Text("No labels loaded.");
+    return;
+  }
+
+  if (ImGui::Begin("Resource Labels", p_open)) {
+    for (const auto& type_pair : labels_) {
+      if (ImGui::TreeNode(type_pair.first.c_str())) {
+        for (const auto& label_pair : type_pair.second) {
+          std::string label_id = type_pair.first + "_" + label_pair.first;
+          ImGui::Text("%s: %s", label_pair.first.c_str(),
+                      label_pair.second.c_str());
+        }
+        ImGui::TreePop();
+      }
+    }
+
+    if (ImGui::Button("Update Labels")) {
+      if (SaveLabels()) {
+        ImGui::Text("Labels updated successfully!");
+      } else {
+        ImGui::Text("Failed to update labels.");
+      }
+    }
+  }
+  ImGui::End();
+}
+
+void ResourceLabelManager::EditLabel(const std::string& type,
+                                     const std::string& key,
+                                     const std::string& newValue) {
+  labels_[type][key] = newValue;
+}
+
+void ResourceLabelManager::SelectableLabelWithNameEdit(
+    bool selected, const std::string& type, const std::string& key,
+    const std::string& defaultValue) {
+  std::string label = CreateOrGetLabel(type, key, defaultValue);
+  ImGui::Selectable(label.c_str(), selected,
+                    ImGuiSelectableFlags_AllowDoubleClick);
+  std::string label_id = type + "_" + key;
+  if (ImGui::IsItemHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Right)) {
+    ImGui::OpenPopup(label_id.c_str());
+  }
+
+  if (ImGui::BeginPopupContextItem(label_id.c_str())) {
+    std::string* new_label = &labels_[type][key];
+    if (ImGui::InputText("##Label", new_label,
+                         ImGuiInputTextFlags_EnterReturnsTrue)) {
+      labels_[type][key] = *new_label;
+    }
+    if (ImGui::Button(ICON_MD_CLOSE)) {
+      ImGui::CloseCurrentPopup();
+    }
+    ImGui::EndPopup();
+  }
+}
+
+std::string ResourceLabelManager::CreateOrGetLabel(
+    const std::string& type, const std::string& key,
+    const std::string& defaultValue) {
+  if (labels_.find(type) == labels_.end()) {
+    labels_[type] = std::unordered_map<std::string, std::string>();
+  }
+  if (labels_[type].find(key) == labels_[type].end()) {
+    labels_[type][key] = defaultValue;
+  }
+  return labels_[type][key];
+}
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze

src/app/core/labeling.h

@@ -0,0 +1,53 @@
+#ifndef YAZE_APP_CORE_LABELING_H_
+#define YAZE_APP_CORE_LABELING_H_
+
+#include <cstdint>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/core/common.h"
+#include "app/core/constants.h"
+
+namespace yaze {
+namespace app {
+namespace core {
+
+// Default types
+static constexpr absl::string_view kDefaultTypes[] = {
+    "Dungeon Names", "Dungeon Room Names", "Overworld Map Names"};
+
+struct ResourceLabelManager {
+  bool LoadLabels(const std::string& filename);
+  bool SaveLabels();
+  void DisplayLabels(bool* p_open);
+  void EditLabel(const std::string& type, const std::string& key,
+                 const std::string& newValue);
+  void SelectableLabelWithNameEdit(bool selected, const std::string& type,
+                                   const std::string& key,
+                                   const std::string& defaultValue);
+  std::string CreateOrGetLabel(const std::string& type, const std::string& key,
+                               const std::string& defaultValue);
+  std::string CreateOrGetLabel(const std::string& type, const std::string& key,
+                               const absl::string_view& defaultValue);
+
+  bool labels_loaded_ = false;
+  std::string filename_;
+  struct ResourceType {
+    std::string key_name;
+    std::string display_description;
+  };
+
+  std::unordered_map<std::string, std::unordered_map<std::string, std::string>>
+      labels_;
+};
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_CORE_LABELING_H_

src/app/core/platform/app_delegate.h

@@ -0,0 +1,18 @@
+#ifndef YAZE_APP_CORE_PLATFORM_APP_DELEGATE_H
+#define YAZE_APP_CORE_PLATFORM_APP_DELEGATE_H
+
+#ifdef TARGET_OS_MAC
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void InitializeCocoa();
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // TARGET_OS_MAC
+
+#endif  // YAZE_APP_CORE_PLATFORM_APP_DELEGATE_H

src/app/core/platform/app_delegate.mm

@@ -0,0 +1,243 @@
+// AppDelegate.mm
+#import "app/core/platform/app_delegate.h"
+#import "app/core/controller.h"
+#import "app/core/platform/file_dialog.h"
+#import "app/editor/utils/editor.h"
+#import "app/rom.h"
+
+#if defined(__APPLE__) && defined(__MACH__)
+/* Apple OSX and iOS (Darwin). */
+#include <TargetConditionals.h>
+
+#import <CoreText/CoreText.h>
+
+#if TARGET_IPHONE_SIMULATOR == 1
+/* iOS in Xcode simulator */
+
+#elif TARGET_OS_IPHONE == 1
+/* iOS */
+
+#elif TARGET_OS_MAC == 1
+/* macOS */
+#import <Cocoa/Cocoa.h>
+
+@interface AppDelegate : NSObject <NSApplicationDelegate>
+- (void)setupMenus;
+// - (void)changeApplicationIcon;
+@end
+
+@implementation AppDelegate
+
+// - (void)changeApplicationIcon {
+//   NSImage *newIcon = [NSImage imageNamed:@"newIcon"];
+//   [NSApp setApplicationIconImage:newIcon];
+// }
+
+- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
+  [self setupMenus];
+}
+
+- (void)setupMenus {
+  NSMenu *mainMenu = [NSApp mainMenu];
+
+  NSMenuItem *fileMenuItem = [mainMenu itemWithTitle:@"File"];
+  if (!fileMenuItem) {
+    NSMenu *fileMenu = [[NSMenu alloc] initWithTitle:@"File"];
+    fileMenuItem = [[NSMenuItem alloc] initWithTitle:@"File" action:nil keyEquivalent:@""];
+    [fileMenuItem setSubmenu:fileMenu];
+
+    NSMenuItem *openItem = [[NSMenuItem alloc] initWithTitle:@"Open"
+                                                      action:@selector(openFileAction:)
+                                               keyEquivalent:@"o"];
+    [fileMenu addItem:openItem];
+
+    // Open Recent
+    NSMenu *openRecentMenu = [[NSMenu alloc] initWithTitle:@"Open Recent"];
+    NSMenuItem *openRecentMenuItem = [[NSMenuItem alloc] initWithTitle:@"Open Recent"
+                                                                action:nil
+                                                         keyEquivalent:@""];
+    [openRecentMenuItem setSubmenu:openRecentMenu];
+    [fileMenu addItem:openRecentMenuItem];
+
+    // Add a separator
+    [fileMenu addItem:[NSMenuItem separatorItem]];
+
+    // Save
+    NSMenuItem *saveItem = [[NSMenuItem alloc] initWithTitle:@"Save" action:nil keyEquivalent:@"s"];
+    [fileMenu addItem:saveItem];
+
+    // Separator
+    [fileMenu addItem:[NSMenuItem separatorItem]];
+
+    // Options submenu
+    NSMenu *optionsMenu = [[NSMenu alloc] initWithTitle:@"Options"];
+    NSMenuItem *optionsMenuItem = [[NSMenuItem alloc] initWithTitle:@"Options"
+                                                             action:nil
+                                                      keyEquivalent:@""];
+    [optionsMenuItem setSubmenu:optionsMenu];
+
+    // Flag checkmark field
+    NSMenuItem *flagItem = [[NSMenuItem alloc] initWithTitle:@"Flag"
+                                                      action:@selector(toggleFlagAction:)
+                                               keyEquivalent:@""];
+    [flagItem setTarget:self];
+    [flagItem setState:NSControlStateValueOff];
+    [optionsMenu addItem:flagItem];
+    [fileMenu addItem:optionsMenuItem];
+
+    [mainMenu insertItem:fileMenuItem atIndex:1];
+  }
+
+  NSMenuItem *editMenuItem = [mainMenu itemWithTitle:@"Edit"];
+  if (!editMenuItem) {
+    NSMenu *editMenu = [[NSMenu alloc] initWithTitle:@"Edit"];
+    editMenuItem = [[NSMenuItem alloc] initWithTitle:@"Edit" action:nil keyEquivalent:@""];
+    [editMenuItem setSubmenu:editMenu];
+
+    NSMenuItem *undoItem = [[NSMenuItem alloc] initWithTitle:@"Undo" action:nil keyEquivalent:@"z"];
+
+    [editMenu addItem:undoItem];
+
+    NSMenuItem *redoItem = [[NSMenuItem alloc] initWithTitle:@"Redo" action:nil keyEquivalent:@"Z"];
+
+    [editMenu addItem:redoItem];
+
+    // Add a separator
+    [editMenu addItem:[NSMenuItem separatorItem]];
+
+    NSMenuItem *cutItem = [[NSMenuItem alloc] initWithTitle:@"Cut"
+                                                     action:@selector(cutAction:)
+                                              keyEquivalent:@"x"];
+    [editMenu addItem:cutItem];
+
+    NSMenuItem *copyItem = [[NSMenuItem alloc] initWithTitle:@"Copy" action:nil keyEquivalent:@"c"];
+    [editMenu addItem:copyItem];
+
+    NSMenuItem *pasteItem = [[NSMenuItem alloc] initWithTitle:@"Paste"
+                                                       action:nil
+                                                keyEquivalent:@"v"];
+
+    [editMenu addItem:pasteItem];
+
+    // Add a separator
+    [editMenu addItem:[NSMenuItem separatorItem]];
+
+    NSMenuItem *selectAllItem = [[NSMenuItem alloc] initWithTitle:@"Select All"
+                                                           action:nil
+                                                    keyEquivalent:@"a"];
+
+    [editMenu addItem:selectAllItem];
+
+    [mainMenu insertItem:editMenuItem atIndex:2];
+  }
+
+  NSMenuItem *viewMenuItem = [mainMenu itemWithTitle:@"View"];
+  if (!viewMenuItem) {
+    NSMenu *viewMenu = [[NSMenu alloc] initWithTitle:@"View"];
+    viewMenuItem = [[NSMenuItem alloc] initWithTitle:@"View" action:nil keyEquivalent:@""];
+    [viewMenuItem setSubmenu:viewMenu];
+
+    // Emulator view button
+    NSMenuItem *emulatorViewItem = [[NSMenuItem alloc] initWithTitle:@"Emulator View"
+                                                              action:nil
+                                                       keyEquivalent:@"1"];
+
+    [viewMenu addItem:emulatorViewItem];
+
+    // Hex Editor View
+    NSMenuItem *hexEditorViewItem = [[NSMenuItem alloc] initWithTitle:@"Hex Editor View"
+                                                               action:nil
+                                                        keyEquivalent:@"2"];
+
+    [viewMenu addItem:hexEditorViewItem];
+
+    // Disassembly view button
+    NSMenuItem *disassemblyViewItem = [[NSMenuItem alloc] initWithTitle:@"Disassembly View"
+                                                                 action:nil
+                                                          keyEquivalent:@"3"];
+
+    [viewMenu addItem:disassemblyViewItem];
+
+    // Memory view button
+    NSMenuItem *memoryViewItem = [[NSMenuItem alloc] initWithTitle:@"Memory View"
+                                                            action:nil
+                                                     keyEquivalent:@"4"];
+
+    [viewMenu addItem:memoryViewItem];
+
+    // Add a separator
+    [viewMenu addItem:[NSMenuItem separatorItem]];
+
+    // Toggle fullscreen button
+    NSMenuItem *toggleFullscreenItem = [[NSMenuItem alloc] initWithTitle:@"Toggle Fullscreen"
+                                                                  action:nil
+                                                           keyEquivalent:@"f"];
+
+    [viewMenu addItem:toggleFullscreenItem];
+
+    [mainMenu insertItem:viewMenuItem atIndex:3];
+  }
+
+  NSMenuItem *helpMenuItem = [mainMenu itemWithTitle:@"Help"];
+  if (!helpMenuItem) {
+    NSMenu *helpMenu = [[NSMenu alloc] initWithTitle:@"Help"];
+    helpMenuItem = [[NSMenuItem alloc] initWithTitle:@"Help" action:nil keyEquivalent:@""];
+    [helpMenuItem setSubmenu:helpMenu];
+
+    // URL to online documentation
+    NSMenuItem *documentationItem = [[NSMenuItem alloc] initWithTitle:@"Documentation"
+                                                               action:nil
+                                                        keyEquivalent:@"?"];
+    [helpMenu addItem:documentationItem];
+
+    [mainMenu insertItem:helpMenuItem atIndex:4];
+  }
+}
+
+// Action method for the New menu item
+- (void)newFileAction:(id)sender {
+  NSLog(@"New File action triggered");
+}
+
+- (void)toggleFlagAction:(id)sender {
+  NSMenuItem *flagItem = (NSMenuItem *)sender;
+  if ([flagItem state] == NSControlStateValueOff) {
+    [flagItem setState:NSControlStateValueOn];
+  } else {
+    [flagItem setState:NSControlStateValueOff];
+  }
+}
+
+- (void)openFileAction:(id)sender {
+  if (!yaze::app::SharedRom::shared_rom_->LoadFromFile(FileDialogWrapper::ShowOpenFileDialog())
+           .ok()) {
+    NSAlert *alert = [[NSAlert alloc] init];
+    [alert setMessageText:@"Error"];
+    [alert setInformativeText:@"Failed to load file."];
+    [alert addButtonWithTitle:@"OK"];
+    [alert runModal];
+  }
+}
+
+- (void)cutAction:(id)sender {
+  // TODO: Implement
+}
+
+- (void)openRecentFileAction:(id)sender {
+  NSLog(@"Open Recent File action triggered");
+}
+
+extern "C" void InitializeCocoa() {
+  @autoreleasepool {
+    AppDelegate *delegate = [[AppDelegate alloc] init];
+    [NSApplication sharedApplication];
+    [NSApp setDelegate:delegate];
+    [NSApp finishLaunching];
+  }
+}
+
+@end
+
+#endif
+
+#endif

src/app/core/platform/clipboard.cc

@@ -0,0 +1,8 @@
+#include "app/core/platform/clipboard.h"
+
+#include <cstdint>
+#include <vector>
+
+void CopyImageToClipboard(const std::vector<uint8_t>& data) {}
+void GetImageFromClipboard(std::vector<uint8_t>& data, int& width,
+                           int& height) {}

src/app/core/platform/clipboard.h

@@ -0,0 +1,27 @@
+#ifndef YAZE_APP_CORE_PLATFORM_CLIPBOARD_H
+#define YAZE_APP_CORE_PLATFORM_CLIPBOARD_H
+
+#ifdef _WIN32
+
+void CopyImageToClipboard(const std::vector<uint8_t>& data);
+void GetImageFromClipboard(std::vector<uint8_t>& data, int& width, int& height);
+
+#elif defined(__APPLE__)
+
+#include <cstdint>
+#include <vector>
+
+void CopyImageToClipboard(const std::vector<uint8_t>& data);
+void GetImageFromClipboard(std::vector<uint8_t>& data, int& width, int& height);
+
+#elif defined(__linux__)
+
+#include <cstdint>
+#include <vector>
+
+void CopyImageToClipboard(const std::vector<uint8_t>& data);
+void GetImageFromClipboard(std::vector<uint8_t>& data, int& width, int& height);
+
+#endif
+
+#endif  // YAZE_APP_CORE_PLATFORM_CLIPBOARD_H

src/app/core/platform/clipboard.mm

@@ -0,0 +1,45 @@
+#include "clipboard.h"
+
+#include <iostream>
+#include <vector>
+
+#ifdef TARGET_OS_MAC
+#import <Cocoa/Cocoa.h>
+
+void CopyImageToClipboard(const std::vector<uint8_t>& pngData) {
+  NSData* data = [NSData dataWithBytes:pngData.data() length:pngData.size()];
+  NSImage* image = [[NSImage alloc] initWithData:data];
+
+  NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+  [pasteboard clearContents];
+  [pasteboard writeObjects:@[ image ]];
+}
+
+void GetImageFromClipboard(std::vector<uint8_t>& pixel_data, int& width, int& height) {
+  NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+  NSArray* classArray = [NSArray arrayWithObject:[NSImage class]];
+  NSDictionary* options = [NSDictionary dictionary];
+
+  NSImage* image = [pasteboard readObjectsForClasses:classArray options:options].firstObject;
+  if (!image) {
+    width = height = 0;
+    return;
+  }
+
+  // Assuming the image is in an RGBA format
+  CGImageRef cgImage = [image CGImageForProposedRect:nil context:nil hints:nil];
+  width = (int)CGImageGetWidth(cgImage);
+  height = (int)CGImageGetHeight(cgImage);
+
+  size_t bytesPerRow = 4 * width;
+  size_t totalBytes = bytesPerRow * height;
+  pixel_data.resize(totalBytes);
+
+  CGContextRef context = CGBitmapContextCreate(
+      pixel_data.data(), width, height, 8, bytesPerRow, CGColorSpaceCreateDeviceRGB(),
+      kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
+  CGContextDrawImage(context, CGRectMake(0, 0, width, height), cgImage);
+  CGContextRelease(context);
+}
+
+#endif

src/app/core/platform/file_dialog.h

@@ -0,0 +1,96 @@
+#ifndef YAZE_APP_CORE_PLATFORM_FILE_DIALOG_H
+#define YAZE_APP_CORE_PLATFORM_FILE_DIALOG_H
+
+#include <string>
+
+#ifdef _WIN32
+// Include Windows-specific headers
+#include <shobjidl.h>
+#include <windows.h>
+
+class FileDialogWrapper {
+ public:
+  static std::string ShowOpenFileDialog() {
+    CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+
+    IFileDialog *pfd = NULL;
+    HRESULT hr =
+        CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_ALL,
+                         IID_IFileDialog, reinterpret_cast<void **>(&pfd));
+    std::string file_path_windows;
+    if (SUCCEEDED(hr)) {
+      // Show the dialog
+      hr = pfd->Show(NULL);
+      if (SUCCEEDED(hr)) {
+        IShellItem *psiResult;
+        hr = pfd->GetResult(&psiResult);
+        if (SUCCEEDED(hr)) {
+          // Get the file path
+          PWSTR pszFilePath;
+          psiResult->GetDisplayName(SIGDN_FILESYSPATH, &pszFilePath);
+          char str[128];
+          wcstombs(str, pszFilePath, 128);
+          file_path_windows = str;
+          psiResult->Release();
+          CoTaskMemFree(pszFilePath);
+        }
+      }
+      pfd->Release();
+    }
+
+    CoUninitialize();
+    return file_path_windows;
+  }
+};
+
+#elif defined(__APPLE__)
+
+#include "TargetConditionals.h"
+
+#include <string>
+#include <vector>
+
+#ifdef TARGET_OS_MAC
+// Other kinds of Mac OS
+
+class FileDialogWrapper {
+ public:
+  static std::string ShowOpenFileDialog();
+  static std::string ShowOpenFolderDialog();
+  static std::vector<std::string> GetSubdirectoriesInFolder(
+      const std::string& folder_path);
+  static std::vector<std::string> GetFilesInFolder(
+      const std::string& folder_path);
+};
+
+#elif TARGET_OS_IPHONE
+
+// iOS
+class FileDialogWrapper {
+ public:
+  static std::string ShowOpenFileDialog();
+  static std::string ShowOpenFolderDialog();
+  static std::vector<std::string> GetSubdirectoriesInFolder(
+      const std::string& folder_path);
+  static std::vector<std::string> GetFilesInFolder(
+      const std::string& folder_path);
+};
+
+#endif
+
+#elif defined(__linux__)
+
+class FileDialogWrapper {
+ public:
+  static std::string ShowOpenFileDialog() {
+    // Linux-specific file dialog implementation using GTK
+    // ...
+    return "file_path_linux";
+  }
+};
+
+#else
+#error "Unsupported platform."
+#endif
+
+#endif  // YAZE_APP_CORE_PLATFORM_FILE_DIALOG_H

src/app/core/platform/file_dialog.mm

@@ -0,0 +1,116 @@
+
+#include <string>
+#include <vector>
+
+#include "app/core/platform/file_dialog.h"
+
+#if defined(__APPLE__) && defined(__MACH__)
+/* Apple OSX and iOS (Darwin). */
+#include <TargetConditionals.h>
+
+#import <CoreText/CoreText.h>
+
+#if TARGET_IPHONE_SIMULATOR == 1
+/* iOS in Xcode simulator */
+std::string FileDialogWrapper::ShowOpenFileDialog() { return ""; }
+
+std::string FileDialogWrapper::ShowOpenFolderDialog() { return ""; }
+
+std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
+  return {};
+}
+
+std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
+  return {};
+}
+
+#elif TARGET_OS_IPHONE == 1
+/* iOS */
+
+std::string FileDialogWrapper::ShowOpenFileDialog() { return ""; }
+
+std::string FileDialogWrapper::ShowOpenFolderDialog() { return ""; }
+
+std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
+  return {};
+}
+
+std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
+  return {};
+}
+
+#elif TARGET_OS_MAC == 1
+/* macOS */
+
+#import <Cocoa/Cocoa.h>
+
+std::string FileDialogWrapper::ShowOpenFileDialog() {
+  NSOpenPanel* openPanel = [NSOpenPanel openPanel];
+  [openPanel setCanChooseFiles:YES];
+  [openPanel setCanChooseDirectories:NO];
+  [openPanel setAllowsMultipleSelection:NO];
+
+  if ([openPanel runModal] == NSModalResponseOK) {
+    NSURL* url = [[openPanel URLs] objectAtIndex:0];
+    NSString* path = [url path];
+    return std::string([path UTF8String]);
+  }
+
+  return "";
+}
+
+std::string FileDialogWrapper::ShowOpenFolderDialog() {
+  NSOpenPanel* openPanel = [NSOpenPanel openPanel];
+  [openPanel setCanChooseFiles:NO];
+  [openPanel setCanChooseDirectories:YES];
+  [openPanel setAllowsMultipleSelection:NO];
+
+  if ([openPanel runModal] == NSModalResponseOK) {
+    NSURL* url = [[openPanel URLs] objectAtIndex:0];
+    NSString* path = [url path];
+    return std::string([path UTF8String]);
+  }
+
+  return "";
+}
+
+std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
+  std::vector<std::string> filenames;
+  NSFileManager* fileManager = [NSFileManager defaultManager];
+  NSDirectoryEnumerator* enumerator =
+      [fileManager enumeratorAtPath:[NSString stringWithUTF8String:folder.c_str()]];
+  NSString* file;
+  while (file = [enumerator nextObject]) {
+    if ([file hasPrefix:@"."]) {
+      continue;
+    }
+    filenames.push_back(std::string([file UTF8String]));
+  }
+  return filenames;
+}
+
+std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
+  std::vector<std::string> subdirectories;
+  NSFileManager* fileManager = [NSFileManager defaultManager];
+  NSDirectoryEnumerator* enumerator =
+      [fileManager enumeratorAtPath:[NSString stringWithUTF8String:folder.c_str()]];
+  NSString* file;
+  while (file = [enumerator nextObject]) {
+    if ([file hasPrefix:@"."]) {
+      continue;
+    }
+    BOOL isDirectory;
+    NSString* path =
+        [NSString stringWithFormat:@"%@/%@", [NSString stringWithUTF8String:folder.c_str()], file];
+    [fileManager fileExistsAtPath:path isDirectory:&isDirectory];
+    if (isDirectory) {
+      subdirectories.push_back(std::string([file UTF8String]));
+    }
+  }
+  return subdirectories;
+}
+#else
+// Unsupported platform
+#endif  // TARGET_OS_MAC
+
+#endif  // __APPLE__ && __MACH__

src/app/core/platform/file_path.h

@@ -0,0 +1,6 @@
+#ifndef YAZE_APP_CORE_PLATFORM_FILE_PATH_H
+#define YAZE_APP_CORE_PLATFORM_FILE_PATH_H
+
+std::string GetBundleResourcePath();
+
+#endif  // YAZE_APP_CORE_PLATFORM_FILE_PATH_H

src/app/core/platform/file_path.mm

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <string>
+
+#if defined(__APPLE__) && defined(__MACH__)
+#include <Foundation/Foundation.h>
+#include <TargetConditionals.h>
+
+#if TARGET_IPHONE_SIMULATOR == 1
+std::string GetBundleResourcePath() {}
+#elif TARGET_OS_IPHONE == 1
+std::string GetBundleResourcePath() {
+  NSBundle* bundle = [NSBundle mainBundle];
+  NSString* resourceDirectoryPath = [bundle bundlePath];
+  NSString* path = [resourceDirectoryPath stringByAppendingString:@"/"];
+  return [path UTF8String];
+}
+#elif TARGET_OS_MAC == 1
+std::string GetBundleResourcePath() {
+  NSBundle* bundle = [NSBundle mainBundle];
+  NSString* resourceDirectoryPath = [bundle bundlePath];
+  NSString* path = [resourceDirectoryPath stringByAppendingString:@"/"];
+  return [path UTF8String];
+}
+
+#endif
+#endif

src/app/core/platform/font_loader.cc

@@ -0,0 +1,81 @@
+#include "app/core/platform/font_loader.h"
+
+#include "imgui/imgui.h"
+
+#include <string>
+#include <vector>
+
+#ifdef _WIN32
+#include <Windows.h>
+
+int CALLBACK EnumFontFamExProc(const LOGFONT* lpelfe, const TEXTMETRIC* lpntme,
+                               DWORD FontType, LPARAM lParam) {
+  // Step 3: Load the font into ImGui
+  ImGuiIO& io = ImGui::GetIO();
+  io.Fonts->AddFontFromFileTTF(lpelfe->lfFaceName, 16.0f);
+
+  return 1;
+}
+
+void LoadSystemFonts() {
+  HKEY hKey;
+  std::vector<std::string> fontPaths;
+
+  // Open the registry key where fonts are listed
+  if (RegOpenKeyEx(
+          HKEY_LOCAL_MACHINE,
+          TEXT("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Fonts"), 0,
+          KEY_READ, &hKey) == ERROR_SUCCESS) {
+    DWORD valueCount;
+    DWORD maxValueNameSize;
+    DWORD maxValueDataSize;
+
+    // Query the number of entries and the maximum size of the names and values
+    RegQueryInfoKey(hKey, NULL, NULL, NULL, NULL, NULL, NULL, &valueCount,
+                    &maxValueNameSize, &maxValueDataSize, NULL, NULL);
+
+    char* valueName = new char[maxValueNameSize + 1];  // +1 for null terminator
+    BYTE* valueData = new BYTE[maxValueDataSize + 1];  // +1 for null terminator
+
+    // Enumerate all font entries
+    for (DWORD i = 0; i < valueCount; i++) {
+      DWORD valueNameSize = maxValueNameSize + 1;  // +1 for null terminator
+      DWORD valueDataSize = maxValueDataSize + 1;  // +1 for null terminator
+      DWORD valueType;
+
+      // Clear buffers
+      memset(valueName, 0, valueNameSize);
+      memset(valueData, 0, valueDataSize);
+
+      // Get the font name and file path
+      if (RegEnumValue(hKey, i, valueName, &valueNameSize, NULL, &valueType,
+                       valueData, &valueDataSize) == ERROR_SUCCESS) {
+        if (valueType == REG_SZ) {
+          // Add the font file path to the vector
+          std::string fontPath((char*)valueData);
+          fontPaths.push_back(fontPath);
+        }
+      }
+    }
+
+    delete[] valueName;
+    delete[] valueData;
+
+    RegCloseKey(hKey);
+  }
+
+  ImGuiIO& io = ImGui::GetIO();
+
+  for (const auto& fontPath : fontPaths) {
+    io.Fonts->AddFontFromFileTTF(fontPath.c_str(), 16.0f);
+  }
+}
+
+#elif defined(__linux__)
+
+void LoadSystemFonts() {
+  // Load Linux System Fonts into ImGui
+  // ...
+}
+
+#endif

src/app/core/platform/font_loader.h

@@ -0,0 +1,26 @@
+// FontLoader.h
+#ifndef FONTLOADER_H
+#define FONTLOADER_H
+
+#include "TargetConditionals.h"
+
+#ifdef _WIN32
+#include <Windows.h>
+// Windows specific function declaration for loading system fonts into ImGui
+int CALLBACK EnumFontFamExProc(const LOGFONT* lpelfe, const TEXTMETRIC* lpntme,
+                               DWORD FontType, LPARAM lParam);
+#elif __APPLE__
+
+#ifdef TARGET_OS_MAC
+
+void LoadSystemFonts();
+
+#elif TARGET_OS_IPHONE
+
+void LoadSystemFonts();
+
+#endif
+
+#endif
+
+#endif  // FONTLOADER_H

src/app/core/platform/font_loader.mm

@@ -0,0 +1,74 @@
+// FontLoader.mm
+#include "app/core/platform/font_loader.h"
+
+#include "imgui/imgui.h"
+
+#include "app/gui/icons.h"
+
+#if defined(__APPLE__) && defined(__MACH__)
+/* Apple OSX and iOS (Darwin). */
+#include <TargetConditionals.h>
+
+#import <CoreText/CoreText.h>
+
+#if TARGET_IPHONE_SIMULATOR == 1
+/* iOS in Xcode simulator */
+void LoadSystemFonts() {}
+
+#elif TARGET_OS_IPHONE == 1
+/* iOS */
+void LoadSystemFonts() {}
+
+#elif TARGET_OS_MAC == 1
+/* macOS */
+
+#import <Cocoa/Cocoa.h>
+
+// MacOS Implementation
+void LoadSystemFonts() {
+  // List of common macOS system fonts
+  NSArray *fontNames = @[ @"Helvetica", @"Times New Roman", @"Courier", @"Arial", @"Verdana" ];
+
+  for (NSString *fontName in fontNames) {
+    NSFont *font = [NSFont fontWithName:fontName size:14.0];
+    if (!font) {
+      NSLog(@"Font not found: %@", fontName);
+      continue;
+    }
+
+    CTFontDescriptorRef fontDescriptor =
+        CTFontDescriptorCreateWithNameAndSize((CFStringRef)font.fontName, font.pointSize);
+    CFURLRef fontURL = (CFURLRef)CTFontDescriptorCopyAttribute(fontDescriptor, kCTFontURLAttribute);
+    NSString *fontPath = [(NSURL *)fontURL path];
+    CFRelease(fontDescriptor);
+
+    if (fontPath != nil && [[NSFileManager defaultManager] isReadableFileAtPath:fontPath]) {
+      // Load the font into ImGui
+      ImGuiIO &io = ImGui::GetIO();
+      ImFontConfig icons_config;
+      icons_config.MergeMode = true;
+      icons_config.GlyphOffset.y = 5.0f;
+      icons_config.GlyphMinAdvanceX = 13.0f;
+      icons_config.PixelSnapH = true;
+      static const ImWchar icons_ranges[] = {ICON_MIN_MD, 0xf900, 0};
+      static const float ICON_FONT_SIZE = 18.0f;
+      ImFont *imFont = io.Fonts->AddFontFromFileTTF([fontPath UTF8String], 14.0f);
+      if (!imFont) {
+        NSLog(@"Failed to load font: %@", fontPath);
+      }
+      io.Fonts->AddFontFromFileTTF(FONT_ICON_FILE_NAME_MD, ICON_FONT_SIZE, &icons_config,
+                                   icons_ranges);
+    } else {
+      NSLog(@"Font file not accessible: %@", fontPath);
+    }
+
+    if (fontURL) {
+      CFRelease(fontURL);
+    }
+  }
+}
+#else
+// Unsupported platform
+#endif
+
+#endif

src/app/core/project.h

@@ -0,0 +1,138 @@
+#ifndef YAZE_APP_CORE_PROJECT_H
+#define YAZE_APP_CORE_PROJECT_H
+
+#include "absl/strings/match.h"
+
+#include <fstream>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include "absl/status/status.h"
+#include "absl/strings/string_view.h"
+#include "app/core/common.h"
+
+namespace yaze {
+namespace app {
+
+constexpr absl::string_view kProjectFileExtension = ".yaze";
+constexpr absl::string_view kProjectFileFilter =
+    "Yaze Project Files (*.yaze)\0*.yaze\0";
+constexpr absl::string_view kPreviousRomFilenameDelimiter =
+    "PreviousRomFilename";
+constexpr absl::string_view kEndOfProjectFile = "EndOfProjectFile";
+
+/**
+ * @struct Project
+ * @brief Represents a project in the application.
+ *
+ * A project is a collection of files and resources that are used in the
+ * creation of a Zelda3 hack that can be saved and loaded. This makes it so the
+ * user can have different rom file names for a single project and keep track of
+ * backups.
+ */
+
+struct Project : public core::ExperimentFlags {
+  /**
+   * @brief Creates a new project.
+   *
+   * @param project_name The name of the project.
+   * @param project_path The path to the project.
+   * @return An absl::Status indicating the success or failure of the project
+   * creation.
+   */
+  absl::Status Create(const std::string &project_name) {
+    name = project_name;
+    project_opened_ = true;
+    return absl::OkStatus();
+  }
+
+  absl::Status Open(const std::string &project_path) {
+    filepath = project_path;
+    name = project_path.substr(project_path.find_last_of("/") + 1);
+
+    std::ifstream in(project_path);
+
+    if (!in.good()) {
+      return absl::InternalError("Could not open project file.");
+    }
+
+    std::string line;
+    std::getline(in, name);
+    std::getline(in, filepath);
+    std::getline(in, rom_filename_);
+    std::getline(in, code_folder_);
+    std::getline(in, labels_filename_);
+
+    while (std::getline(in, line)) {
+      if (line == kEndOfProjectFile) {
+        break;
+      }
+
+      if (absl::StrContains(line, kPreviousRomFilenameDelimiter)) {
+        previous_rom_filenames_.push_back(
+            line.substr(line.find(kPreviousRomFilenameDelimiter) +
+                        kPreviousRomFilenameDelimiter.size() + 1));
+      }
+    }
+
+    in.close();
+
+    return absl::OkStatus();
+  }
+
+  absl::Status Save() {
+    RETURN_IF_ERROR(CheckForEmptyFields());
+
+    std::ofstream out(filepath + "/" + name + ".yaze");
+    if (!out.good()) {
+      return absl::InternalError("Could not open project file.");
+    }
+
+    out << name << std::endl;
+    out << filepath << std::endl;
+    out << rom_filename_ << std::endl;
+    out << code_folder_ << std::endl;
+    out << labels_filename_ << std::endl;
+
+    for (const auto &filename : previous_rom_filenames_) {
+      out << kPreviousRomFilenameDelimiter << " " << filename << std::endl;
+    }
+
+    out << kEndOfProjectFile << std::endl;
+
+    out.close();
+
+    return absl::OkStatus();
+  }
+
+  absl::Status CheckForEmptyFields() {
+    if (name.empty() || filepath.empty() || rom_filename_.empty() ||
+        code_folder_.empty() || labels_filename_.empty()) {
+      return absl::InvalidArgumentError(
+          "Project fields cannot be empty. Please load a rom file, set your "
+          "code folder, and set your labels file. See HELP for more details.");
+    }
+
+    return absl::OkStatus();
+  }
+
+  absl::Status SerializeExperimentFlags() {
+    auto flags = mutable_flags();
+    // TODO: Serialize flags
+    return absl::OkStatus();
+  }
+
+  bool project_opened_ = false;
+  std::string name;
+  std::string filepath;
+  std::string rom_filename_ = "";
+  std::string code_folder_ = "";
+  std::string labels_filename_ = "";
+  std::vector<std::string> previous_rom_filenames_;
+};
+
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_CORE_PROJECT_H

src/app/core/testable.h

@@ -0,0 +1,19 @@
+#ifndef YAZE_APP_CORE_TESTABLE_H
+#define YAZE_APP_CORE_TESTABLE_H
+
+#include <imgui_test_engine/imgui_te_context.h>
+
+namespace yaze {
+namespace app {
+namespace core {
+class GuiTestable {
+ public:
+  virtual void RegisterTests(ImGuiTestEngine* e) = 0;
+
+  ImGuiTestEngine* test_engine;
+};
+}  // namespace core
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_CORE_TESTABLE_H

src/app/editor/CMakeLists.txt

@@ -0,0 +1,21 @@
+set(
+  YAZE_APP_EDITOR_SRC
+  app/editor/dungeon/dungeon_editor.cc
+  app/editor/master_editor.cc
+  app/editor/master_editor_test.cc
+  app/editor/settings_editor.cc
+  app/editor/overworld_editor.cc
+  app/editor/sprite/sprite_editor.cc
+  app/editor/music/music_editor.cc
+  app/editor/message/message_editor.cc
+  app/editor/message/message_editor_test.cc
+  app/editor/code/assembly_editor.cc
+  app/editor/graphics/screen_editor.cc
+  app/editor/graphics/graphics_editor.cc
+  app/editor/graphics/palette_editor.cc
+  app/editor/graphics/tile16_editor.cc
+  app/editor/graphics/gfx_group_editor.cc
+  app/editor/utils/gfx_context.cc
+  app/editor/overworld/refresh.cc
+  app/editor/overworld/entity.cc
+)

src/app/editor/code/assembly_editor.cc

@@ -0,0 +1,367 @@
+#include "assembly_editor.h"
+
+#include "ImGuiColorTextEdit/TextEditor.h"
+
+#include "app/core/platform/file_dialog.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "core/constants.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+namespace {
+
+std::vector<std::string> RemoveIgnoredFiles(
+    const std::vector<std::string>& files,
+    const std::vector<std::string>& ignored_files) {
+  std::vector<std::string> filtered_files;
+  for (const auto& file : files) {
+    // Remove subdirectory files
+    if (file.find('/') != std::string::npos) {
+      continue;
+    }
+    // Make sure the file has an extension
+    if (file.find('.') == std::string::npos) {
+      continue;
+    }
+    if (std::find(ignored_files.begin(), ignored_files.end(), file) ==
+        ignored_files.end()) {
+      filtered_files.push_back(file);
+    }
+  }
+  return filtered_files;
+}
+
+core::FolderItem LoadFolder(const std::string& folder) {
+  // Check if .gitignore exists in the folder
+  std::ifstream gitignore(folder + "/.gitignore");
+  std::vector<std::string> ignored_files;
+  if (gitignore.good()) {
+    std::string line;
+    while (std::getline(gitignore, line)) {
+      if (line[0] == '#') {
+        continue;
+      }
+      if (line[0] == '!') {
+        // Ignore the file
+        continue;
+      }
+      ignored_files.push_back(line);
+    }
+  }
+
+  core::FolderItem current_folder;
+  current_folder.name = folder;
+  auto root_files = FileDialogWrapper::GetFilesInFolder(current_folder.name);
+  current_folder.files = RemoveIgnoredFiles(root_files, ignored_files);
+
+  for (const auto& folder :
+       FileDialogWrapper::GetSubdirectoriesInFolder(current_folder.name)) {
+    core::FolderItem folder_item;
+    folder_item.name = folder;
+    std::string full_folder = current_folder.name + "/" + folder;
+    auto folder_files = FileDialogWrapper::GetFilesInFolder(full_folder);
+    for (const auto& files : folder_files) {
+      // Remove subdirectory files
+      if (files.find('/') != std::string::npos) {
+        continue;
+      }
+      // Make sure the file has an extension
+      if (files.find('.') == std::string::npos) {
+        continue;
+      }
+      if (std::find(ignored_files.begin(), ignored_files.end(), files) !=
+          ignored_files.end()) {
+        continue;
+      }
+      folder_item.files.push_back(files);
+    }
+
+    for (const auto& subdir :
+         FileDialogWrapper::GetSubdirectoriesInFolder(full_folder)) {
+      core::FolderItem subfolder_item;
+      subfolder_item.name = subdir;
+      subfolder_item.files = FileDialogWrapper::GetFilesInFolder(subdir);
+      folder_item.subfolders.push_back(subfolder_item);
+    }
+    current_folder.subfolders.push_back(folder_item);
+  }
+
+  return current_folder;
+}
+
+}  // namespace
+
+void AssemblyEditor::OpenFolder(const std::string& folder_path) {
+  current_folder_ = LoadFolder(folder_path);
+}
+
+void AssemblyEditor::Update(bool& is_loaded) {
+  ImGui::Begin("Assembly Editor", &is_loaded);
+  if (ImGui::BeginMenuBar()) {
+    DrawFileMenu();
+    DrawEditMenu();
+    ImGui::EndMenuBar();
+  }
+
+  auto cpos = text_editor_.GetCursorPosition();
+  SetEditorText();
+  ImGui::Text("%6d/%-6d %6d lines  | %s | %s | %s | %s", cpos.mLine + 1,
+              cpos.mColumn + 1, text_editor_.GetTotalLines(),
+              text_editor_.IsOverwrite() ? "Ovr" : "Ins",
+              text_editor_.CanUndo() ? "*" : " ",
+              text_editor_.GetLanguageDefinition().mName.c_str(),
+              current_file_.c_str());
+
+  text_editor_.Render("##asm_editor");
+  ImGui::End();
+}
+
+void AssemblyEditor::InlineUpdate() {
+  ChangeActiveFile("assets/asm/template_song.asm");
+  auto cpos = text_editor_.GetCursorPosition();
+  SetEditorText();
+  ImGui::Text("%6d/%-6d %6d lines  | %s | %s | %s | %s", cpos.mLine + 1,
+              cpos.mColumn + 1, text_editor_.GetTotalLines(),
+              text_editor_.IsOverwrite() ? "Ovr" : "Ins",
+              text_editor_.CanUndo() ? "*" : " ",
+              text_editor_.GetLanguageDefinition().mName.c_str(),
+              current_file_.c_str());
+
+  text_editor_.Render("##asm_editor", ImVec2(0, 0));
+}
+
+void AssemblyEditor::UpdateCodeView() {
+  ImGui::BeginTable("##table_view", 2,
+                    ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg |
+                        ImGuiTableFlags_Resizable);
+
+  // Table headers
+  ImGui::TableSetupColumn("Files", ImGuiTableColumnFlags_WidthFixed, 256.0f);
+  ImGui::TableSetupColumn("Editor", ImGuiTableColumnFlags_WidthStretch);
+
+  ImGui::TableHeadersRow();
+
+  // Table data
+  ImGui::TableNextRow();
+  ImGui::TableNextColumn();
+  if (current_folder_.name != "") {
+    DrawCurrentFolder();
+  } else {
+    if (ImGui::Button("Open Folder")) {
+      current_folder_ = LoadFolder(FileDialogWrapper::ShowOpenFolderDialog());
+    }
+  }
+
+  ImGui::TableNextColumn();
+
+  auto cpos = text_editor_.GetCursorPosition();
+  SetEditorText();
+  ImGui::Text("%6d/%-6d %6d lines  | %s | %s | %s | %s", cpos.mLine + 1,
+              cpos.mColumn + 1, text_editor_.GetTotalLines(),
+              text_editor_.IsOverwrite() ? "Ovr" : "Ins",
+              text_editor_.CanUndo() ? "*" : " ",
+              text_editor_.GetLanguageDefinition().mName.c_str(),
+              current_file_.c_str());
+
+  text_editor_.Render("##asm_editor");
+
+  ImGui::EndTable();
+}
+
+void AssemblyEditor::DrawCurrentFolder() {
+  if (ImGui::BeginChild("##current_folder", ImVec2(0, 0), true,
+                        ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
+    if (ImGui::BeginTable("##file_table", 2,
+                          ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg |
+                              ImGuiTableFlags_Resizable |
+                              ImGuiTableFlags_Sortable)) {
+      ImGui::TableSetupColumn("Name", ImGuiTableColumnFlags_WidthFixed, 256.0f);
+      ImGui::TableSetupColumn("Type", ImGuiTableColumnFlags_WidthStretch);
+
+      ImGui::TableHeadersRow();
+
+      for (const auto& file : current_folder_.files) {
+        ImGui::TableNextRow();
+        ImGui::TableNextColumn();
+        if (ImGui::Selectable(file.c_str())) {
+          ChangeActiveFile(absl::StrCat(current_folder_.name, "/", file));
+        }
+        ImGui::TableNextColumn();
+        ImGui::Text("File");
+      }
+
+      for (const auto& subfolder : current_folder_.subfolders) {
+        ImGui::TableNextRow();
+        ImGui::TableNextColumn();
+        if (ImGui::TreeNode(subfolder.name.c_str())) {
+          for (const auto& file : subfolder.files) {
+            ImGui::TableNextRow();
+            ImGui::TableNextColumn();
+            if (ImGui::Selectable(file.c_str())) {
+              ChangeActiveFile(absl::StrCat(current_folder_.name, "/",
+                                            subfolder.name, "/", file));
+            }
+            ImGui::TableNextColumn();
+            ImGui::Text("File");
+          }
+          ImGui::TreePop();
+        } else {
+          ImGui::TableNextColumn();
+          ImGui::Text("Folder");
+        }
+      }
+
+      ImGui::EndTable();
+    }
+
+    ImGui::EndChild();
+  }
+}
+
+void AssemblyEditor::DrawFileTabView() {
+  static int next_tab_id = 0;
+
+  if (ImGui::BeginTabBar("AssemblyFileTabBar", ImGuiTabBarFlags_None)) {
+    if (ImGui::TabItemButton(ICON_MD_ADD, ImGuiTabItemFlags_None)) {
+      if (std::find(active_files_.begin(), active_files_.end(),
+                    current_file_id_) != active_files_.end()) {
+        // Room is already open
+        next_tab_id++;
+      }
+      active_files_.push_back(next_tab_id++);  // Add new tab
+    }
+
+    // Submit our regular tabs
+    for (int n = 0; n < active_files_.Size;) {
+      bool open = true;
+
+      if (ImGui::BeginTabItem(files_[active_files_[n]].data(), &open,
+                              ImGuiTabItemFlags_None)) {
+        auto cpos = text_editor_.GetCursorPosition();
+        {
+          std::ifstream t(current_file_);
+          if (t.good()) {
+            std::string str((std::istreambuf_iterator<char>(t)),
+                            std::istreambuf_iterator<char>());
+            text_editor_.SetText(str);
+          } else {
+            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+                         "Error opening file: %s\n", current_file_.c_str());
+          }
+        }
+        ImGui::Text("%6d/%-6d %6d lines  | %s | %s | %s | %s", cpos.mLine + 1,
+                    cpos.mColumn + 1, text_editor_.GetTotalLines(),
+                    text_editor_.IsOverwrite() ? "Ovr" : "Ins",
+                    text_editor_.CanUndo() ? "*" : " ",
+                    text_editor_.GetLanguageDefinition().mName.c_str(),
+                    current_file_.c_str());
+
+        open_files_[active_files_[n]].Render("##asm_editor");
+        ImGui::EndTabItem();
+      }
+
+      if (!open)
+        active_files_.erase(active_files_.Data + n);
+      else
+        n++;
+    }
+
+    ImGui::EndTabBar();
+  }
+  ImGui::Separator();
+}
+
+void AssemblyEditor::DrawFileMenu() {
+  if (ImGui::BeginMenu("File")) {
+    if (ImGui::MenuItem("Open", "Ctrl+O")) {
+      ImGuiFileDialog::Instance()->OpenDialog(
+          "ChooseASMFileDlg", "Open ASM file", ".asm,.txt", ".");
+    }
+    if (ImGui::MenuItem("Save", "Ctrl+S")) {
+      // TODO: Implement this
+    }
+    ImGui::EndMenu();
+  }
+
+  if (ImGuiFileDialog::Instance()->Display("ChooseASMFileDlg")) {
+    if (ImGuiFileDialog::Instance()->IsOk()) {
+      ChangeActiveFile(ImGuiFileDialog::Instance()->GetFilePathName());
+    }
+    ImGuiFileDialog::Instance()->Close();
+  }
+}
+
+void AssemblyEditor::DrawEditMenu() {
+  if (ImGui::BeginMenu("Edit")) {
+    if (ImGui::MenuItem("Undo", "Ctrl+Z")) {
+      text_editor_.Undo();
+    }
+    if (ImGui::MenuItem("Redo", "Ctrl+Y")) {
+      text_editor_.Redo();
+    }
+    ImGui::Separator();
+    if (ImGui::MenuItem("Cut", "Ctrl+X")) {
+      text_editor_.Cut();
+    }
+    if (ImGui::MenuItem("Copy", "Ctrl+C")) {
+      text_editor_.Copy();
+    }
+    if (ImGui::MenuItem("Paste", "Ctrl+V")) {
+      text_editor_.Paste();
+    }
+    ImGui::Separator();
+    if (ImGui::MenuItem("Find", "Ctrl+F")) {
+      // TODO: Implement this.
+    }
+    ImGui::EndMenu();
+  }
+}
+
+void AssemblyEditor::SetEditorText() {
+  if (!file_is_loaded_) {
+    std::ifstream t(current_file_);
+    if (t.good()) {
+      std::string str((std::istreambuf_iterator<char>(t)),
+                      std::istreambuf_iterator<char>());
+      text_editor_.SetText(str);
+    } else {
+      SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Error opening file: %s\n",
+                   current_file_.c_str());
+    }
+    file_is_loaded_ = true;
+  }
+}
+
+absl::Status AssemblyEditor::Cut() {
+  text_editor_.Cut();
+  return absl::OkStatus();
+}
+
+absl::Status AssemblyEditor::Copy() {
+  text_editor_.Copy();
+  return absl::OkStatus();
+}
+
+absl::Status AssemblyEditor::Paste() {
+  text_editor_.Paste();
+  return absl::OkStatus();
+}
+
+absl::Status AssemblyEditor::Undo() {
+  text_editor_.Undo();
+  return absl::OkStatus();
+}
+
+absl::Status AssemblyEditor::Redo() {
+  text_editor_.Redo();
+  return absl::OkStatus();
+}
+
+absl::Status AssemblyEditor::Update() { return absl::OkStatus(); }
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/code/assembly_editor.h

@@ -0,0 +1,79 @@
+#ifndef YAZE_APP_EDITOR_ASSEMBLY_EDITOR_H
+#define YAZE_APP_EDITOR_ASSEMBLY_EDITOR_H
+
+#include "ImGuiColorTextEdit/TextEditor.h"
+#include "ImGuiFileDialog/ImGuiFileDialog.h"
+
+#include <fstream>
+#include <istream>
+#include <string>
+
+#include "app/core/common.h"
+#include "app/editor/utils/editor.h"
+#include "app/gui/style.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+/**
+ * @class AssemblyEditor
+ * @brief Text editor for modifying assembly code.
+ */
+class AssemblyEditor : public Editor {
+ public:
+  AssemblyEditor() {
+    text_editor_.SetLanguageDefinition(gui::GetAssemblyLanguageDef());
+    text_editor_.SetPalette(TextEditor::GetDarkPalette());
+    text_editor_.SetShowWhitespaces(false);
+    type_ = EditorType::kAssembly;
+  }
+  void ChangeActiveFile(const std::string_view &filename) {
+    current_file_ = filename;
+    file_is_loaded_ = false;
+  }
+
+  void Update(bool &is_loaded);
+  void InlineUpdate();
+
+  void UpdateCodeView();
+
+  absl::Status Cut() override;
+  absl::Status Copy() override;
+  absl::Status Paste() override;
+
+  absl::Status Undo() override;
+  absl::Status Redo() override;
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+  absl::Status Update() override;
+
+  void OpenFolder(const std::string &folder_path);
+
+ private:
+  void DrawFileMenu();
+  void DrawEditMenu();
+
+  void SetEditorText();
+
+  void DrawCurrentFolder();
+
+  void DrawFileTabView();
+
+  bool file_is_loaded_ = false;
+
+  std::vector<std::string> files_;
+  std::vector<TextEditor> open_files_;
+  ImVector<int> active_files_;
+  int current_file_id_ = 0;
+
+  std::string current_file_;
+  core::FolderItem current_folder_;
+  TextEditor text_editor_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/editor/code/memory_editor.h

@@ -0,0 +1,88 @@
+#ifndef YAZE_APP_EDITOR_CODE_MEMORY_EDITOR_H
+#define YAZE_APP_EDITOR_CODE_MEMORY_EDITOR_H
+
+#include "imgui/imgui.h"
+#include "imgui/misc/cpp/imgui_stdlib.h"
+#include "imgui_memory_editor.h"
+
+#include "absl/status/status.h"
+#include "app/core/common.h"
+#include "app/core/constants.h"
+#include "app/core/platform/file_dialog.h"
+#include "app/core/project.h"
+#include "app/editor/code/assembly_editor.h"
+#include "app/editor/code/memory_editor.h"
+#include "app/editor/dungeon/dungeon_editor.h"
+#include "app/editor/graphics/graphics_editor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/graphics/screen_editor.h"
+#include "app/editor/music/music_editor.h"
+#include "app/editor/overworld_editor.h"
+#include "app/editor/sprite/sprite_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/editor/utils/gfx_context.h"
+#include "app/editor/utils/recent_files.h"
+#include "app/emu/emulator.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/gui/style.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::SameLine;
+using ImGui::Text;
+
+struct MemoryEditorWithDiffChecker : public SharedRom {
+  void Update(bool &show_memory_editor) {
+    static MemoryEditor mem_edit;
+    static MemoryEditor comp_edit;
+    static bool show_compare_rom = false;
+    static Rom comparison_rom;
+    ImGui::Begin("Hex Editor", &show_memory_editor);
+    if (ImGui::Button("Compare Rom")) {
+      auto file_name = FileDialogWrapper::ShowOpenFileDialog();
+      PRINT_IF_ERROR(comparison_rom.LoadFromFile(file_name));
+      show_compare_rom = true;
+    }
+
+    static uint64_t convert_address = 0;
+    gui::InputHex("SNES to PC", (int *)&convert_address, 6, 200.f);
+    SameLine();
+    Text("%x", core::SnesToPc(convert_address));
+
+    // mem_edit.DrawWindow("Memory Editor", (void*)&(*rom()), rom()->size());
+    BEGIN_TABLE("Memory Comparison", 2, ImGuiTableFlags_Resizable);
+    SETUP_COLUMN("Source")
+    SETUP_COLUMN("Dest")
+
+    NEXT_COLUMN()
+    Text("%s", rom()->filename().data());
+    mem_edit.DrawContents((void *)&(*rom()), rom()->size());
+
+    NEXT_COLUMN()
+    if (show_compare_rom) {
+      comp_edit.SetComparisonData((void *)&(*rom()));
+      ImGui::BeginGroup();
+      ImGui::BeginChild("Comparison ROM");
+      Text("%s", comparison_rom.filename().data());
+      comp_edit.DrawContents((void *)&(comparison_rom), comparison_rom.size());
+      ImGui::EndChild();
+      ImGui::EndGroup();
+    }
+    END_TABLE()
+
+    ImGui::End();
+  }
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_CODE_MEMORY_EDITOR_H

src/app/editor/dungeon/dungeon_editor.cc

@@ -0,0 +1,830 @@
+#include "dungeon_editor.h"
+
+#include "imgui/imgui.h"
+
+#include "app/core/common.h"
+#include "app/core/labeling.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gui/canvas.h"
+#include "app/gui/color.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/rom.h"
+#include "app/zelda3/dungeon/object_names.h"
+#include "app/zelda3/dungeon/room_names.h"
+#include "zelda3/dungeon/room.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginChild;
+using ImGui::BeginTabBar;
+using ImGui::BeginTabItem;
+using ImGui::BeginTable;
+using ImGui::Button;
+using ImGui::EndChild;
+using ImGui::EndTabBar;
+using ImGui::EndTabItem;
+using ImGui::RadioButton;
+using ImGui::SameLine;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+
+constexpr ImGuiTableFlags kDungeonObjectTableFlags =
+    ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable |
+    ImGuiTableFlags_Hideable | ImGuiTableFlags_BordersOuter |
+    ImGuiTableFlags_BordersV;
+
+absl::Status DungeonEditor::Update() {
+  if (!is_loaded_ && rom()->is_loaded()) {
+    RETURN_IF_ERROR(Initialize());
+    is_loaded_ = true;
+  }
+
+  if (refresh_graphics_) {
+    RETURN_IF_ERROR(RefreshGraphics());
+    refresh_graphics_ = false;
+  }
+
+  TAB_BAR("##DungeonEditorTabBar")
+  TAB_ITEM("Room Editor")
+  status_ = UpdateDungeonRoomView();
+  END_TAB_ITEM()
+  TAB_ITEM("Usage Statistics")
+  if (is_loaded_) {
+    static bool calc_stats = false;
+    if (!calc_stats) {
+      CalculateUsageStats();
+      calc_stats = true;
+    }
+    DrawUsageStats();
+  }
+  END_TAB_ITEM()
+  END_TAB_BAR()
+
+  return absl::OkStatus();
+}
+
+absl::Status DungeonEditor::Initialize() {
+  auto dungeon_man_pal_group = rom()->palette_group().dungeon_main;
+  for (int i = 0; i < 0x100 + 40; i++) {
+    rooms_.emplace_back(zelda3::dungeon::Room(i));
+    rooms_[i].LoadHeader();
+    rooms_[i].LoadRoomFromROM();
+    if (flags()->kDrawDungeonRoomGraphics) {
+      rooms_[i].LoadRoomGraphics();
+    }
+
+    room_size_pointers_.push_back(rooms_[i].room_size_ptr());
+    if (rooms_[i].room_size_ptr() != 0x0A8000) {
+      room_size_addresses_[i] = rooms_[i].room_size_ptr();
+    }
+
+    auto dungeon_palette_ptr = rom()->paletteset_ids[rooms_[i].palette][0];
+    ASSIGN_OR_RETURN(auto palette_id,
+                     rom()->ReadWord(0xDEC4B + dungeon_palette_ptr));
+    int p_id = palette_id / 180;
+    auto color = dungeon_man_pal_group[p_id][3];
+    room_palette_[rooms_[i].palette] = color.rgb();
+  }
+
+  LoadDungeonRoomSize();
+  // LoadRoomEntrances
+  for (int i = 0; i < 0x07; ++i) {
+    entrances_.emplace_back(zelda3::dungeon::RoomEntrance(*rom(), i, true));
+  }
+
+  for (int i = 0; i < 0x85; ++i) {
+    entrances_.emplace_back(zelda3::dungeon::RoomEntrance(*rom(), i, false));
+  }
+
+  // Load the palette group and palette for the dungeon
+  full_palette_ = dungeon_man_pal_group[current_palette_group_id_];
+  ASSIGN_OR_RETURN(current_palette_group_,
+                   gfx::CreatePaletteGroupFromLargePalette(full_palette_));
+
+  graphics_bin_ = *rom()->mutable_bitmap_manager();
+  // Create a vector of pointers to the current block bitmaps
+  for (int block : rooms_[current_room_id_].blocks()) {
+    room_gfx_sheets_.emplace_back(&graphics_bin_[block]);
+  }
+  return absl::OkStatus();
+}
+
+absl::Status DungeonEditor::RefreshGraphics() {
+  for (int i = 0; i < 8; i++) {
+    int block = rooms_[current_room_id_].blocks()[i];
+    RETURN_IF_ERROR(graphics_bin_[block].ApplyPaletteWithTransparent(
+        current_palette_group_[current_palette_id_], 0));
+    rom()->UpdateBitmap(&graphics_bin_[block], true);
+  }
+  auto sprites_aux1_pal_group = rom()->palette_group().sprites_aux1;
+  for (int i = 9; i < 16; i++) {
+    int block = rooms_[current_room_id_].blocks()[i];
+    RETURN_IF_ERROR(graphics_bin_[block].ApplyPaletteWithTransparent(
+        sprites_aux1_pal_group[current_palette_id_], 0));
+    rom()->UpdateBitmap(&graphics_bin_[block], true);
+  }
+  return absl::OkStatus();
+}
+
+void DungeonEditor::LoadDungeonRoomSize() {
+  std::map<int, std::vector<int>> rooms_by_bank;
+  for (const auto& room : room_size_addresses_) {
+    int bank = room.second >> 16;
+    rooms_by_bank[bank].push_back(room.second);
+  }
+
+  // Process and calculate room sizes within each bank
+  for (auto& bank_rooms : rooms_by_bank) {
+    // Sort the rooms within this bank
+    std::sort(bank_rooms.second.begin(), bank_rooms.second.end());
+
+    for (size_t i = 0; i < bank_rooms.second.size(); ++i) {
+      int room_ptr = bank_rooms.second[i];
+
+      // Identify the room ID for the current room pointer
+      int room_id =
+          std::find_if(room_size_addresses_.begin(), room_size_addresses_.end(),
+                       [room_ptr](const auto& entry) {
+                         return entry.second == room_ptr;
+                       })
+              ->first;
+
+      if (room_ptr != 0x0A8000) {
+        if (i < bank_rooms.second.size() - 1) {
+          // Calculate size as difference between current room and next room
+          // in the same bank
+          rooms_[room_id].set_room_size(bank_rooms.second[i + 1] - room_ptr);
+        } else {
+          // Calculate size for the last room in this bank
+          int bank_end_address = (bank_rooms.first << 16) | 0xFFFF;
+          rooms_[room_id].set_room_size(bank_end_address - room_ptr + 1);
+        }
+        total_room_size_ += rooms_[room_id].room_size();
+      } else {
+        // Room with address 0x0A8000
+        rooms_[room_id].set_room_size(0x00);
+      }
+    }
+  }
+}
+
+absl::Status DungeonEditor::UpdateDungeonRoomView() {
+  DrawToolset();
+
+  if (palette_showing_) {
+    ImGui::Begin("Palette Editor", &palette_showing_, 0);
+    auto dungeon_main_pal_group = rom()->palette_group().dungeon_main;
+    current_palette_ = dungeon_main_pal_group[current_palette_group_id_];
+    gui::SelectablePalettePipeline(current_palette_id_, refresh_graphics_,
+                                   current_palette_);
+    ImGui::End();
+  }
+
+  if (BeginTable("#DungeonEditTable", 3, kDungeonTableFlags, ImVec2(0, 0))) {
+    TableSetupColumn("Room Selector");
+    TableSetupColumn("Canvas", ImGuiTableColumnFlags_WidthStretch,
+                     ImGui::GetContentRegionAvail().x);
+    TableSetupColumn("Object Selector");
+    TableHeadersRow();
+    TableNextRow();
+
+    TableNextColumn();
+    TAB_BAR("##DungeonRoomTabBar");
+    TAB_ITEM("Rooms");
+    DrawRoomSelector();
+    END_TAB_ITEM();
+    TAB_ITEM("Entrances");
+    DrawEntranceSelector();
+    END_TAB_ITEM();
+    END_TAB_BAR();
+
+    TableNextColumn();
+    DrawDungeonTabView();
+
+    TableNextColumn();
+    DrawTileSelector();
+    ImGui::EndTable();
+  }
+  return absl::OkStatus();
+}
+
+void DungeonEditor::DrawToolset() {
+  if (BeginTable("DWToolset", 13, ImGuiTableFlags_SizingFixedFit,
+                 ImVec2(0, 0))) {
+    TableSetupColumn("#undoTool");
+    TableSetupColumn("#redoTool");
+    TableSetupColumn("#separator");
+    TableSetupColumn("#anyTool");
+
+    TableSetupColumn("#bg1Tool");
+    TableSetupColumn("#bg2Tool");
+    TableSetupColumn("#bg3Tool");
+    TableSetupColumn("#separator");
+    TableSetupColumn("#spriteTool");
+    TableSetupColumn("#itemTool");
+    TableSetupColumn("#doorTool");
+    TableSetupColumn("#blockTool");
+
+    TableNextColumn();
+    if (Button(ICON_MD_UNDO)) {
+      PRINT_IF_ERROR(Undo());
+    }
+
+    TableNextColumn();
+    if (Button(ICON_MD_REDO)) {
+      PRINT_IF_ERROR(Redo());
+    }
+
+    TableNextColumn();
+    Text(ICON_MD_MORE_VERT);
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_FILTER_NONE, background_type_ == kBackgroundAny)) {
+      background_type_ = kBackgroundAny;
+    }
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_FILTER_1, background_type_ == kBackground1)) {
+      background_type_ = kBackground1;
+    }
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_FILTER_2, background_type_ == kBackground2)) {
+      background_type_ = kBackground2;
+    }
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_FILTER_3, background_type_ == kBackground3)) {
+      background_type_ = kBackground3;
+    }
+
+    TableNextColumn();
+    Text(ICON_MD_MORE_VERT);
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_PEST_CONTROL, placement_type_ == kSprite)) {
+      placement_type_ = kSprite;
+    }
+    if (ImGui::IsItemHovered()) {
+      ImGui::SetTooltip("Sprites");
+    }
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_GRASS, placement_type_ == kItem)) {
+      placement_type_ = kItem;
+    }
+    if (ImGui::IsItemHovered()) {
+      ImGui::SetTooltip("Items");
+    }
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_SENSOR_DOOR, placement_type_ == kDoor)) {
+      placement_type_ = kDoor;
+    }
+    if (ImGui::IsItemHovered()) {
+      ImGui::SetTooltip("Doors");
+    }
+
+    TableNextColumn();
+    if (RadioButton(ICON_MD_SQUARE, placement_type_ == kBlock)) {
+      placement_type_ = kBlock;
+    }
+    if (ImGui::IsItemHovered()) {
+      ImGui::SetTooltip("Blocks");
+    }
+
+    TableNextColumn();
+    if (Button(ICON_MD_PALETTE)) {
+      palette_showing_ = !palette_showing_;
+    }
+
+    ImGui::EndTable();
+  }
+}
+
+void DungeonEditor::DrawRoomSelector() {
+  if (rom()->is_loaded()) {
+    gui::InputHexWord("Room ID", &current_room_id_);
+    gui::InputHex("Palette ID", &current_palette_id_);
+
+    if (ImGuiID child_id = ImGui::GetID((void*)(intptr_t)9);
+        BeginChild(child_id, ImGui::GetContentRegionAvail(), true,
+                   ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
+      int i = 0;
+      for (const auto each_room_name : zelda3::dungeon::kRoomNames) {
+        rom()->resource_label()->SelectableLabelWithNameEdit(
+            current_room_id_ == i, "Dungeon Room Names",
+            core::UppercaseHexByte(i), zelda3::dungeon::kRoomNames[i].data());
+        if (ImGui::IsItemClicked()) {
+          // TODO: Jump to tab if room is already open
+          current_room_id_ = i;
+          if (!active_rooms_.contains(i)) {
+            active_rooms_.push_back(i);
+          }
+        }
+        i += 1;
+      }
+    }
+    EndChild();
+  }
+}
+
+using ImGui::Separator;
+
+void DungeonEditor::DrawEntranceSelector() {
+  if (rom()->is_loaded()) {
+    auto current_entrance = entrances_[current_entrance_id_];
+    gui::InputHexWord("Entrance ID", &current_entrance.entrance_id_);
+    gui::InputHexWord("Room ID", &current_entrance.room_, 50.f, true);
+    SameLine();
+
+    gui::InputHexByte("Dungeon ID", &current_entrance.dungeon_id_, 50.f, true);
+    gui::InputHexByte("Blockset", &current_entrance.blockset_, 50.f, true);
+    SameLine();
+
+    gui::InputHexByte("Music", &current_entrance.music_, 50.f, true);
+    SameLine();
+    gui::InputHexByte("Floor", &current_entrance.floor_);
+    Separator();
+
+    gui::InputHexWord("Player X   ", &current_entrance.x_position_);
+    SameLine();
+    gui::InputHexWord("Player Y   ", &current_entrance.y_position_);
+
+    gui::InputHexWord("Camera X", &current_entrance.camera_trigger_x_);
+    SameLine();
+    gui::InputHexWord("Camera Y", &current_entrance.camera_trigger_y_);
+
+    gui::InputHexWord("Scroll X    ", &current_entrance.camera_x_);
+    SameLine();
+    gui::InputHexWord("Scroll Y    ", &current_entrance.camera_y_);
+
+    gui::InputHexWord("Exit", &current_entrance.exit_, 50.f, true);
+
+    Separator();
+    Text("Camera Boundaries");
+    Separator();
+    Text("\t\t\t\t\tNorth         East         South         West");
+    gui::InputHexByte("Quadrant", &current_entrance.camera_boundary_qn_, 50.f,
+                      true);
+    SameLine();
+    gui::InputHexByte("", &current_entrance.camera_boundary_qe_, 50.f, true);
+    SameLine();
+    gui::InputHexByte("", &current_entrance.camera_boundary_qs_, 50.f, true);
+    SameLine();
+    gui::InputHexByte("", &current_entrance.camera_boundary_qw_, 50.f, true);
+
+    gui::InputHexByte("Full room", &current_entrance.camera_boundary_fn_, 50.f,
+                      true);
+    SameLine();
+    gui::InputHexByte("", &current_entrance.camera_boundary_fe_, 50.f, true);
+    SameLine();
+    gui::InputHexByte("", &current_entrance.camera_boundary_fs_, 50.f, true);
+    SameLine();
+    gui::InputHexByte("", &current_entrance.camera_boundary_fw_, 50.f, true);
+
+    if (BeginChild("EntranceSelector", ImVec2(0, 0), true,
+                   ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
+      for (int i = 0; i < 0x85 + 7; i++) {
+        rom()->resource_label()->SelectableLabelWithNameEdit(
+            current_entrance_id_ == i, "Dungeon Entrance Names",
+            core::UppercaseHexByte(i),
+            zelda3::dungeon::kEntranceNames[i].data());
+
+        if (ImGui::IsItemClicked()) {
+          current_entrance_id_ = i;
+          if (!active_rooms_.contains(i)) {
+            active_rooms_.push_back(entrances_[i].room_);
+          }
+        }
+      }
+    }
+    EndChild();
+  }
+}
+
+void DungeonEditor::DrawDungeonTabView() {
+  static int next_tab_id = 0;
+
+  if (BeginTabBar("MyTabBar", kDungeonTabBarFlags)) {
+    if (ImGui::TabItemButton(ICON_MD_ADD, kDungeonTabFlags)) {
+      if (std::find(active_rooms_.begin(), active_rooms_.end(),
+                    current_room_id_) != active_rooms_.end()) {
+        // Room is already open
+        next_tab_id++;
+      }
+      active_rooms_.push_back(next_tab_id++);  // Add new tab
+    }
+
+    // Submit our regular tabs
+    for (int n = 0; n < active_rooms_.Size;) {
+      bool open = true;
+
+      if (active_rooms_[n] > sizeof(zelda3::dungeon::kRoomNames) / 4) {
+        active_rooms_.erase(active_rooms_.Data + n);
+        continue;
+      }
+
+      if (BeginTabItem(zelda3::dungeon::kRoomNames[active_rooms_[n]].data(),
+                       &open, ImGuiTabItemFlags_None)) {
+        DrawDungeonCanvas(active_rooms_[n]);
+        EndTabItem();
+      }
+
+      if (!open)
+        active_rooms_.erase(active_rooms_.Data + n);
+      else
+        n++;
+    }
+
+    EndTabBar();
+  }
+  Separator();
+}
+
+void DungeonEditor::DrawDungeonCanvas(int room_id) {
+  ImGui::BeginGroup();
+
+  gui::InputHexByte("Layout", &rooms_[room_id].layout);
+  SameLine();
+
+  gui::InputHexByte("Blockset", &rooms_[room_id].blockset);
+  SameLine();
+
+  gui::InputHexByte("Spriteset", &rooms_[room_id].spriteset);
+  SameLine();
+
+  gui::InputHexByte("Palette", &rooms_[room_id].palette);
+
+  gui::InputHexByte("Floor1", &rooms_[room_id].floor1);
+  SameLine();
+
+  gui::InputHexByte("Floor2", &rooms_[room_id].floor2);
+  SameLine();
+
+  gui::InputHexWord("Message ID", &rooms_[room_id].message_id_);
+  SameLine();
+
+  ImGui::EndGroup();
+
+  canvas_.DrawBackground(ImVec2(0x200, 0x200));
+  canvas_.DrawContextMenu();
+  if (is_loaded_) {
+    canvas_.DrawBitmap(rooms_[room_id].layer1(), 0, 0);
+  }
+  canvas_.DrawGrid();
+  canvas_.DrawOverlay();
+}
+
+void DungeonEditor::DrawRoomGraphics() {
+  const auto height = 0x40;
+  const int num_sheets = 0x10;
+  room_gfx_canvas_.DrawBackground(ImVec2(0x100 + 1, num_sheets * height + 1));
+  room_gfx_canvas_.DrawContextMenu();
+  room_gfx_canvas_.DrawTileSelector(32);
+  if (is_loaded_) {
+    auto blocks = rooms_[current_room_id_].blocks();
+    int current_block = 0;
+    for (int block : blocks) {
+      int offset = height * (current_block + 1);
+      int top_left_y = room_gfx_canvas_.zero_point().y + 2;
+      if (current_block >= 1) {
+        top_left_y = room_gfx_canvas_.zero_point().y + height * current_block;
+      }
+      room_gfx_canvas_.draw_list()->AddImage(
+          (void*)graphics_bin_[block].texture(),
+          ImVec2(room_gfx_canvas_.zero_point().x + 2, top_left_y),
+          ImVec2(room_gfx_canvas_.zero_point().x + 0x100,
+                 room_gfx_canvas_.zero_point().y + offset));
+      current_block += 1;
+    }
+  }
+  room_gfx_canvas_.DrawGrid(32.0f);
+  room_gfx_canvas_.DrawOverlay();
+}
+
+void DungeonEditor::DrawTileSelector() {
+  if (BeginTabBar("##TabBar", ImGuiTabBarFlags_FittingPolicyScroll)) {
+    if (BeginTabItem("Room Graphics")) {
+      if (ImGuiID child_id = ImGui::GetID((void*)(intptr_t)3);
+          BeginChild(child_id, ImGui::GetContentRegionAvail(), true,
+                     ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
+        DrawRoomGraphics();
+      }
+      EndChild();
+      EndTabItem();
+    }
+
+    if (BeginTabItem("Object Renderer")) {
+      DrawObjectRenderer();
+      EndTabItem();
+    }
+    EndTabBar();
+  }
+}
+
+void DungeonEditor::DrawObjectRenderer() {
+  if (BeginTable("DungeonObjectEditorTable", 2, kDungeonObjectTableFlags,
+                 ImVec2(0, 0))) {
+    TableSetupColumn("Dungeon Objects", ImGuiTableColumnFlags_WidthStretch,
+                     ImGui::GetContentRegionAvail().x);
+    TableSetupColumn("Canvas");
+
+    TableNextColumn();
+    BeginChild("DungeonObjectButtons", ImVec2(250, 0), true);
+
+    int selected_object = 0;
+    int i = 0;
+    for (const auto object_name : zelda3::dungeon::Type1RoomObjectNames) {
+      if (ImGui::Selectable(object_name.data(), selected_object == i)) {
+        selected_object = i;
+        current_object_ = i;
+        object_renderer_.LoadObject(i,
+                                    rooms_[current_room_id_].mutable_blocks());
+        rom()->RenderBitmap(object_renderer_.bitmap());
+        object_loaded_ = true;
+      }
+      i += 1;
+    }
+
+    EndChild();
+
+    // Right side of the table - Canvas
+    TableNextColumn();
+    BeginChild("DungeonObjectCanvas", ImVec2(276, 0x10 * 0x40 + 1), true);
+
+    object_canvas_.DrawBackground(ImVec2(256 + 1, 0x10 * 0x40 + 1));
+    object_canvas_.DrawContextMenu();
+    object_canvas_.DrawTileSelector(32);
+    if (object_loaded_) {
+      object_canvas_.DrawBitmap(*object_renderer_.bitmap(), 0, 0);
+    }
+    object_canvas_.DrawGrid(32.0f);
+    object_canvas_.DrawOverlay();
+
+    EndChild();
+    ImGui::EndTable();
+  }
+
+  if (object_loaded_) {
+    ImGui::Begin("Memory Viewer", &object_loaded_, 0);
+    static MemoryEditor mem_edit;
+    mem_edit.DrawContents((void*)object_renderer_.mutable_memory(),
+                          object_renderer_.mutable_memory()->size());
+    ImGui::End();
+  }
+}
+
+// ============================================================================
+
+void DungeonEditor::CalculateUsageStats() {
+  for (const auto& room : rooms_) {
+    if (blockset_usage_.find(room.blockset) == blockset_usage_.end()) {
+      blockset_usage_[room.blockset] = 1;
+    } else {
+      blockset_usage_[room.blockset] += 1;
+    }
+
+    if (spriteset_usage_.find(room.spriteset) == spriteset_usage_.end()) {
+      spriteset_usage_[room.spriteset] = 1;
+    } else {
+      spriteset_usage_[room.spriteset] += 1;
+    }
+
+    if (palette_usage_.find(room.palette) == palette_usage_.end()) {
+      palette_usage_[room.palette] = 1;
+    } else {
+      palette_usage_[room.palette] += 1;
+    }
+  }
+}
+
+void DungeonEditor::RenderSetUsage(
+    const absl::flat_hash_map<uint16_t, int>& usage_map, uint16_t& selected_set,
+    int spriteset_offset) {
+  // Sort the usage map by set number
+  std::vector<std::pair<uint16_t, int>> sorted_usage(usage_map.begin(),
+                                                     usage_map.end());
+  std::sort(sorted_usage.begin(), sorted_usage.end(),
+            [](const auto& a, const auto& b) { return a.first < b.first; });
+
+  for (const auto& [set, count] : sorted_usage) {
+    std::string display_str;
+    if (spriteset_offset != 0x00) {
+      display_str = absl::StrFormat("%#02x, %#02x: %d", set,
+                                    (set + spriteset_offset), count);
+    } else {
+      display_str =
+          absl::StrFormat("%#02x: %d", (set + spriteset_offset), count);
+    }
+    if (ImGui::Selectable(display_str.c_str(), selected_set == set)) {
+      selected_set = set;  // Update the selected set when clicked
+    }
+  }
+}
+
+namespace {
+// Calculate the unused sets in a usage map
+// Range for blocksets 0-0x24
+// Range for spritesets 0-0x8F
+// Range for palettes 0-0x47
+template <typename T>
+void RenderUnusedSets(const absl::flat_hash_map<T, int>& usage_map, int max_set,
+                      int spriteset_offset = 0x00) {
+  std::vector<int> unused_sets;
+  for (int i = 0; i < max_set; i++) {
+    if (usage_map.find(i) == usage_map.end()) {
+      unused_sets.push_back(i);
+    }
+  }
+  for (const auto& set : unused_sets) {
+    if (spriteset_offset != 0x00) {
+      Text("%#02x, %#02x", set, (set + spriteset_offset));
+    } else {
+      Text("%#02x", set);
+    }
+  }
+}
+}  // namespace
+
+void DungeonEditor::DrawUsageStats() {
+  if (Button("Refresh")) {
+    selected_blockset_ = 0xFFFF;
+    selected_spriteset_ = 0xFFFF;
+    selected_palette_ = 0xFFFF;
+    spriteset_usage_.clear();
+    blockset_usage_.clear();
+    palette_usage_.clear();
+    CalculateUsageStats();
+  }
+
+  ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
+  ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
+  if (BeginTable("DungeonUsageStatsTable", 8,
+                 kDungeonTableFlags | ImGuiTableFlags_SizingFixedFit,
+                 ImGui::GetContentRegionAvail())) {
+    TableSetupColumn("Blockset Usage");
+    TableSetupColumn("Unused Blockset");
+    TableSetupColumn("Palette Usage");
+    TableSetupColumn("Unused Palette");
+    TableSetupColumn("Spriteset Usage");
+    TableSetupColumn("Unused Spriteset");
+    TableSetupColumn("Usage Grid");
+    TableSetupColumn("Group Preview");
+    TableHeadersRow();
+    ImGui::PopStyleVar(2);
+
+    TableNextColumn();
+    BeginChild("BlocksetUsageScroll", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    RenderSetUsage(blockset_usage_, selected_blockset_);
+    EndChild();
+
+    TableNextColumn();
+    BeginChild("UnusedBlocksetScroll", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    RenderUnusedSets(blockset_usage_, 0x25);
+    EndChild();
+
+    TableNextColumn();
+    BeginChild("PaletteUsageScroll", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    RenderSetUsage(palette_usage_, selected_palette_);
+    EndChild();
+
+    TableNextColumn();
+    BeginChild("UnusedPaletteScroll", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    RenderUnusedSets(palette_usage_, 0x48);
+    EndChild();
+
+    TableNextColumn();
+
+    BeginChild("SpritesetUsageScroll", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    RenderSetUsage(spriteset_usage_, selected_spriteset_, 0x40);
+    EndChild();
+
+    TableNextColumn();
+    BeginChild("UnusedSpritesetScroll", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    RenderUnusedSets(spriteset_usage_, 0x90, 0x40);
+    EndChild();
+
+    TableNextColumn();
+    BeginChild("UsageGrid", ImVec2(0, 0), true,
+               ImGuiWindowFlags_HorizontalScrollbar);
+    Text("%s", absl::StrFormat("Total size of all rooms: %d hex format: %#06x",
+                               total_room_size_, total_room_size_)
+                   .c_str());
+    DrawUsageGrid();
+    EndChild();
+
+    TableNextColumn();
+    if (selected_blockset_ < 0x25) {
+      gfx_group_editor_.SetSelectedBlockset(selected_blockset_);
+      gfx_group_editor_.DrawBlocksetViewer(true);
+    } else if (selected_spriteset_ < 0x90) {
+      gfx_group_editor_.SetSelectedSpriteset(selected_spriteset_ + 0x40);
+      gfx_group_editor_.DrawSpritesetViewer(true);
+    }
+  }
+  ImGui::EndTable();
+}
+
+void DungeonEditor::DrawUsageGrid() {
+  int totalSquares = 296;
+  int squaresWide = 16;
+  int squaresTall = (totalSquares + squaresWide - 1) /
+                    squaresWide;  // Ceiling of totalSquares/squaresWide
+
+  for (int row = 0; row < squaresTall; ++row) {
+    ImGui::NewLine();
+
+    for (int col = 0; col < squaresWide; ++col) {
+      // Check if we have reached 295 squares
+      if (row * squaresWide + col >= totalSquares) {
+        break;
+      }
+      // Determine if this square should be highlighted
+      const auto& room = rooms_[row * squaresWide + col];
+
+      // Create a button or selectable for each square
+      ImGui::BeginGroup();
+      ImVec4 color = room_palette_[room.palette];
+      color.x = color.x / 255;
+      color.y = color.y / 255;
+      color.z = color.z / 255;
+      color.w = 1.0f;
+      if (rooms_[row * squaresWide + col].room_size() > 0xFFFF) {
+        color = ImVec4(1.0f, 0.0f, 0.0f, 1.0f);  // Or any highlight color
+      }
+      if (rooms_[row * squaresWide + col].room_size() == 0) {
+        color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);  // Or any highlight color
+      }
+      ImGui::PushStyleColor(ImGuiCol_Button, color);
+      // Make the button text darker
+      ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(0.0f, 0.0f, 0.0f, 1.0f));
+
+      bool highlight = room.blockset == selected_blockset_ ||
+                       room.spriteset == selected_spriteset_ ||
+                       room.palette == selected_palette_;
+
+      // Set highlight color if needed
+      if (highlight) {
+        ImGui::PushStyleColor(
+            ImGuiCol_Button,
+            ImVec4(1.0f, 0.5f, 0.0f, 1.0f));  // Or any highlight color
+      }
+      if (Button(absl::StrFormat("%#x",
+                                 rooms_[row * squaresWide + col].room_size())
+                     .c_str(),
+                 ImVec2(55, 30))) {
+        // Switch over to the room editor tab
+        // and add a room tab by the ID of the square
+        // that was clicked
+      }
+      if (ImGui::IsMouseClicked(ImGuiMouseButton_Right)) {
+        ImGui::OpenPopup(
+            absl::StrFormat("RoomContextMenu%d", row * squaresWide + col)
+                .c_str());
+      }
+      ImGui::PopStyleColor(2);
+      ImGui::EndGroup();
+
+      // Reset style if it was highlighted
+      if (highlight) {
+        ImGui::PopStyleColor();
+      }
+
+      // Check if the square is hovered
+      if (ImGui::IsItemHovered()) {
+        // Display a tooltip with all the room properties
+        ImGui::BeginTooltip();
+        Text("Room ID: %d", row * squaresWide + col);
+        Text("Blockset: %#02x", room.blockset);
+        Text("Spriteset: %#02x", room.spriteset);
+        Text("Palette: %#02x", room.palette);
+        Text("Floor1: %#02x", room.floor1);
+        Text("Floor2: %#02x", room.floor2);
+        Text("Message ID: %#04x", room.message_id_);
+        Text("Size: %#016llx", room.room_size());
+        Text("Size Pointer: %#016llx", room.room_size_ptr());
+        ImGui::EndTooltip();
+      }
+
+      // Keep squares in the same line
+      SameLine();
+    }
+  }
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/dungeon/dungeon_editor.h

@@ -0,0 +1,153 @@
+#ifndef YAZE_APP_EDITOR_DUNGEONEDITOR_H
+#define YAZE_APP_EDITOR_DUNGEONEDITOR_H
+
+#include "imgui/imgui.h"
+
+#include "app/core/common.h"
+#include "app/core/labeling.h"
+#include "app/editor/graphics/gfx_group_editor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+#include "zelda3/dungeon/room.h"
+#include "zelda3/dungeon/room_entrance.h"
+#include "zelda3/dungeon/room_object.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+constexpr ImGuiTabItemFlags kDungeonTabFlags =
+    ImGuiTabItemFlags_Trailing | ImGuiTabItemFlags_NoTooltip;
+
+constexpr ImGuiTabBarFlags kDungeonTabBarFlags =
+    ImGuiTabBarFlags_AutoSelectNewTabs | ImGuiTabBarFlags_Reorderable |
+    ImGuiTabBarFlags_FittingPolicyResizeDown |
+    ImGuiTabBarFlags_TabListPopupButton;
+
+constexpr ImGuiTableFlags kDungeonTableFlags =
+    ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable |
+    ImGuiTableFlags_Hideable | ImGuiTableFlags_BordersOuter |
+    ImGuiTableFlags_BordersV;
+
+/**
+ * @brief DungeonEditor class for editing dungeons.
+ *
+ * This class is currently a work in progress and is used for editing dungeons.
+ * It provides various functions for updating, cutting, copying, pasting,
+ * undoing, and redoing. It also includes methods for drawing the toolset, room
+ * selector, entrance selector, dungeon tab view, dungeon canvas, room graphics,
+ * tile selector, and object renderer. Additionally, it handles loading room
+ * entrances, calculating usage statistics, and rendering set usage.
+ */
+class DungeonEditor : public Editor,
+                      public SharedRom,
+                      public core::ExperimentFlags {
+ public:
+  DungeonEditor() { type_ = EditorType::kDungeon; }
+
+  absl::Status Update() override;
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+  void add_room(int i) { active_rooms_.push_back(i); }
+
+ private:
+  absl::Status Initialize();
+  absl::Status RefreshGraphics();
+
+  void LoadDungeonRoomSize();
+
+  absl::Status UpdateDungeonRoomView();
+
+  void DrawToolset();
+  void DrawRoomSelector();
+  void DrawEntranceSelector();
+
+  void DrawDungeonTabView();
+  void DrawDungeonCanvas(int room_id);
+
+  void DrawRoomGraphics();
+  void DrawTileSelector();
+  void DrawObjectRenderer();
+
+  void CalculateUsageStats();
+  void DrawUsageStats();
+  void DrawUsageGrid();
+  void RenderSetUsage(const absl::flat_hash_map<uint16_t, int>& usage_map,
+                      uint16_t& selected_set, int spriteset_offset = 0x00);
+
+  enum BackgroundType {
+    kNoBackground,
+    kBackground1,
+    kBackground2,
+    kBackground3,
+    kBackgroundAny,
+  };
+  enum PlacementType { kNoType, kSprite, kItem, kDoor, kBlock };
+
+  int background_type_ = kNoBackground;
+  int placement_type_ = kNoType;
+  int current_object_ = 0;
+
+  bool is_loaded_ = false;
+  bool object_loaded_ = false;
+  bool palette_showing_ = false;
+  bool refresh_graphics_ = false;
+  bool show_object_render_ = false;
+
+  uint16_t current_entrance_id_ = 0;
+  uint16_t current_room_id_ = 0;
+  uint64_t current_palette_id_ = 0;
+  uint64_t current_palette_group_id_ = 0;
+
+  ImVector<int> active_rooms_;
+
+  GfxGroupEditor gfx_group_editor_;
+  PaletteEditor palette_editor_;
+  gfx::SnesPalette current_palette_;
+  gfx::SnesPalette full_palette_;
+  gfx::PaletteGroup current_palette_group_;
+
+  gui::Canvas canvas_;
+  gui::Canvas room_gfx_canvas_;
+  gui::Canvas object_canvas_;
+
+  gfx::Bitmap room_gfx_bmp_;
+  gfx::BitmapManager graphics_bin_;
+
+  std::vector<gfx::Bitmap*> room_gfx_sheets_;
+  std::vector<zelda3::dungeon::Room> rooms_;
+  std::vector<zelda3::dungeon::RoomEntrance> entrances_;
+  std::vector<gfx::BitmapManager> room_graphics_;
+  zelda3::dungeon::DungeonObjectRenderer object_renderer_;
+
+  absl::flat_hash_map<uint16_t, int> spriteset_usage_;
+  absl::flat_hash_map<uint16_t, int> blockset_usage_;
+  absl::flat_hash_map<uint16_t, int> palette_usage_;
+
+  std::vector<int64_t> room_size_pointers_;
+
+  uint16_t selected_blockset_ = 0xFFFF;  // 0xFFFF indicates no selection
+  uint16_t selected_spriteset_ = 0xFFFF;
+  uint16_t selected_palette_ = 0xFFFF;
+
+  uint64_t total_room_size_ = 0;
+
+  std::unordered_map<int, int> room_size_addresses_;
+  std::unordered_map<int, ImVec4> room_palette_;
+
+  absl::Status status_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/editor/graphics/gfx_group_editor.cc

@@ -0,0 +1,311 @@
+#include "gfx_group_editor.h"
+
+#include "imgui/imgui.h"
+
+#include <cmath>
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/color.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/rom.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginChild;
+using ImGui::BeginGroup;
+using ImGui::BeginTabBar;
+using ImGui::BeginTabItem;
+using ImGui::BeginTable;
+using ImGui::ColorButton;
+using ImGui::EndChild;
+using ImGui::EndGroup;
+using ImGui::EndTabBar;
+using ImGui::EndTabItem;
+using ImGui::EndTable;
+using ImGui::GetContentRegionAvail;
+using ImGui::GetStyle;
+using ImGui::IsItemClicked;
+using ImGui::PopID;
+using ImGui::PushID;
+using ImGui::SameLine;
+using ImGui::Selectable;
+using ImGui::Separator;
+using ImGui::SetNextItemWidth;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+
+using gfx::kPaletteGroupNames;
+using gfx::PaletteCategory;
+
+absl::Status GfxGroupEditor::Update() {
+  if (BeginTabBar("GfxGroupEditor")) {
+    if (BeginTabItem("Main")) {
+      gui::InputHexByte("Selected Blockset", &selected_blockset_,
+                        (uint8_t)0x24);
+      rom()->resource_label()->SelectableLabelWithNameEdit(
+          false, "blockset", "0x" + std::to_string(selected_blockset_),
+          "Blockset " + std::to_string(selected_blockset_));
+      DrawBlocksetViewer();
+      EndTabItem();
+    }
+
+    if (BeginTabItem("Rooms")) {
+      gui::InputHexByte("Selected Blockset", &selected_roomset_, (uint8_t)81);
+      rom()->resource_label()->SelectableLabelWithNameEdit(
+          false, "roomset", "0x" + std::to_string(selected_roomset_),
+          "Roomset " + std::to_string(selected_roomset_));
+      DrawRoomsetViewer();
+      EndTabItem();
+    }
+
+    if (BeginTabItem("Sprites")) {
+      gui::InputHexByte("Selected Spriteset", &selected_spriteset_,
+                        (uint8_t)143);
+      rom()->resource_label()->SelectableLabelWithNameEdit(
+          false, "spriteset", "0x" + std::to_string(selected_spriteset_),
+          "Spriteset " + std::to_string(selected_spriteset_));
+      Text("Values");
+      DrawSpritesetViewer();
+      EndTabItem();
+    }
+
+    if (BeginTabItem("Palettes")) {
+      DrawPaletteViewer();
+      EndTabItem();
+    }
+
+    EndTabBar();
+  }
+
+  return absl::OkStatus();
+}
+
+void GfxGroupEditor::DrawBlocksetViewer(bool sheet_only) {
+  if (BeginTable("##BlocksetTable", sheet_only ? 1 : 2,
+                 ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable,
+                 ImVec2(0, 0))) {
+    if (!sheet_only) {
+      TableSetupColumn("Inputs", ImGuiTableColumnFlags_WidthStretch,
+                       GetContentRegionAvail().x);
+    }
+
+    TableSetupColumn("Sheets", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableHeadersRow();
+    TableNextRow();
+    if (!sheet_only) {
+      TableNextColumn();
+      {
+        BeginGroup();
+        for (int i = 0; i < 8; i++) {
+          SetNextItemWidth(100.f);
+          gui::InputHexByte(("0x" + std::to_string(i)).c_str(),
+                            &rom()->main_blockset_ids[selected_blockset_][i]);
+        }
+        EndGroup();
+      }
+    }
+    TableNextColumn();
+    {
+      BeginGroup();
+      for (int i = 0; i < 8; i++) {
+        int sheet_id = rom()->main_blockset_ids[selected_blockset_][i];
+        auto sheet = rom()->bitmap_manager()[sheet_id];
+        gui::BitmapCanvasPipeline(blockset_canvas_, sheet, 256, 0x10 * 0x04,
+                                  0x20, true, false, 22);
+      }
+      EndGroup();
+    }
+    EndTable();
+  }
+}
+
+void GfxGroupEditor::DrawRoomsetViewer() {
+  Text("Values - Overwrites 4 of main blockset");
+  if (BeginTable("##Roomstable", 3,
+                 ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable,
+                 ImVec2(0, 0))) {
+    TableSetupColumn("List", ImGuiTableColumnFlags_WidthFixed, 100);
+    TableSetupColumn("Inputs", ImGuiTableColumnFlags_WidthStretch,
+                     GetContentRegionAvail().x);
+    TableSetupColumn("Sheets", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableHeadersRow();
+    TableNextRow();
+
+    TableNextColumn();
+    {
+      BeginChild("##RoomsetList");
+      for (int i = 0; i < 0x51; i++) {
+        BeginGroup();
+        std::string roomset_label = absl::StrFormat("0x%02X", i);
+        rom()->resource_label()->SelectableLabelWithNameEdit(
+            false, "roomset", roomset_label, "Roomset " + roomset_label);
+        if (IsItemClicked()) {
+          selected_roomset_ = i;
+        }
+        EndGroup();
+      }
+      EndChild();
+    }
+
+    TableNextColumn();
+    {
+      BeginGroup();
+      for (int i = 0; i < 4; i++) {
+        SetNextItemWidth(100.f);
+        gui::InputHexByte(("0x" + std::to_string(i)).c_str(),
+                          &rom()->room_blockset_ids[selected_roomset_][i]);
+      }
+      EndGroup();
+    }
+    TableNextColumn();
+    {
+      BeginGroup();
+      for (int i = 0; i < 4; i++) {
+        int sheet_id = rom()->room_blockset_ids[selected_roomset_][i];
+        auto sheet = rom()->bitmap_manager()[sheet_id];
+        gui::BitmapCanvasPipeline(roomset_canvas_, sheet, 256, 0x10 * 0x04,
+                                  0x20, true, false, 23);
+      }
+      EndGroup();
+    }
+    EndTable();
+  }
+}
+
+void GfxGroupEditor::DrawSpritesetViewer(bool sheet_only) {
+  if (BeginTable("##SpritesTable", sheet_only ? 1 : 2,
+                 ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable,
+                 ImVec2(0, 0))) {
+    if (!sheet_only) {
+      TableSetupColumn("Inputs", ImGuiTableColumnFlags_WidthStretch,
+                       GetContentRegionAvail().x);
+    }
+    TableSetupColumn("Sheets", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableHeadersRow();
+    TableNextRow();
+    if (!sheet_only) {
+      TableNextColumn();
+      {
+        BeginGroup();
+        for (int i = 0; i < 4; i++) {
+          SetNextItemWidth(100.f);
+          gui::InputHexByte(("0x" + std::to_string(i)).c_str(),
+                            &rom()->spriteset_ids[selected_spriteset_][i]);
+        }
+        EndGroup();
+      }
+    }
+    TableNextColumn();
+    {
+      BeginGroup();
+      for (int i = 0; i < 4; i++) {
+        int sheet_id = rom()->spriteset_ids[selected_spriteset_][i];
+        auto sheet = rom()->bitmap_manager()[115 + sheet_id];
+        gui::BitmapCanvasPipeline(spriteset_canvas_, sheet, 256, 0x10 * 0x04,
+                                  0x20, true, false, 24);
+      }
+      EndGroup();
+    }
+    EndTable();
+  }
+}
+
+namespace {
+void DrawPaletteFromPaletteGroup(gfx::SnesPalette &palette) {
+  if (palette.empty()) {
+    return;
+  }
+  for (int n = 0; n < palette.size(); n++) {
+    PushID(n);
+    if ((n % 8) != 0) SameLine(0.0f, GetStyle().ItemSpacing.y);
+
+    // Small icon of the color in the palette
+    if (gui::SnesColorButton(absl::StrCat("Palette", n), palette[n],
+                             ImGuiColorEditFlags_NoAlpha |
+                                 ImGuiColorEditFlags_NoPicker |
+                                 ImGuiColorEditFlags_NoTooltip)) {
+    }
+
+    PopID();
+  }
+}
+}  // namespace
+
+void GfxGroupEditor::DrawPaletteViewer() {
+  gui::InputHexByte("Selected Paletteset", &selected_paletteset_);
+  if (selected_paletteset_ >= 71) {
+    selected_paletteset_ = 71;
+  }
+  rom()->resource_label()->SelectableLabelWithNameEdit(
+      false, "paletteset", "0x" + std::to_string(selected_paletteset_),
+      "Paletteset " + std::to_string(selected_paletteset_));
+
+  uint8_t &dungeon_main_palette_val =
+      rom()->paletteset_ids[selected_paletteset_][0];
+  uint8_t &dungeon_spr_pal_1_val =
+      rom()->paletteset_ids[selected_paletteset_][1];
+  uint8_t &dungeon_spr_pal_2_val =
+      rom()->paletteset_ids[selected_paletteset_][2];
+  uint8_t &dungeon_spr_pal_3_val =
+      rom()->paletteset_ids[selected_paletteset_][3];
+
+  gui::InputHexByte("Dungeon Main", &dungeon_main_palette_val);
+
+  rom()->resource_label()->SelectableLabelWithNameEdit(
+      false, kPaletteGroupNames[PaletteCategory::kDungeons].data(),
+      std::to_string(dungeon_main_palette_val), "Unnamed dungeon palette");
+  auto &palette = *rom()->mutable_palette_group()->dungeon_main.mutable_palette(
+      rom()->paletteset_ids[selected_paletteset_][0]);
+  DrawPaletteFromPaletteGroup(palette);
+  Separator();
+
+  gui::InputHexByte("Dungeon Spr Pal 1", &dungeon_spr_pal_1_val);
+  auto &spr_aux_pal1 =
+      *rom()->mutable_palette_group()->sprites_aux1.mutable_palette(
+          rom()->paletteset_ids[selected_paletteset_][1]);
+  DrawPaletteFromPaletteGroup(spr_aux_pal1);
+  SameLine();
+  rom()->resource_label()->SelectableLabelWithNameEdit(
+      false, kPaletteGroupNames[PaletteCategory::kSpritesAux1].data(),
+      std::to_string(dungeon_spr_pal_1_val), "Dungeon Spr Pal 1");
+  Separator();
+
+  gui::InputHexByte("Dungeon Spr Pal 2", &dungeon_spr_pal_2_val);
+  auto &spr_aux_pal2 =
+      *rom()->mutable_palette_group()->sprites_aux2.mutable_palette(
+          rom()->paletteset_ids[selected_paletteset_][2]);
+  DrawPaletteFromPaletteGroup(spr_aux_pal2);
+  SameLine();
+  rom()->resource_label()->SelectableLabelWithNameEdit(
+      false, kPaletteGroupNames[PaletteCategory::kSpritesAux2].data(),
+      std::to_string(dungeon_spr_pal_2_val), "Dungeon Spr Pal 2");
+  Separator();
+
+  gui::InputHexByte("Dungeon Spr Pal 3", &dungeon_spr_pal_3_val);
+  auto &spr_aux_pal3 =
+      *rom()->mutable_palette_group()->sprites_aux3.mutable_palette(
+          rom()->paletteset_ids[selected_paletteset_][3]);
+  DrawPaletteFromPaletteGroup(spr_aux_pal3);
+  SameLine();
+  rom()->resource_label()->SelectableLabelWithNameEdit(
+      false, kPaletteGroupNames[PaletteCategory::kSpritesAux3].data(),
+      std::to_string(dungeon_spr_pal_3_val), "Dungeon Spr Pal 3");
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/graphics/gfx_group_editor.h

@@ -0,0 +1,73 @@
+#ifndef YAZE_APP_EDITOR_GFX_GROUP_EDITOR_H
+#define YAZE_APP_EDITOR_GFX_GROUP_EDITOR_H
+
+#include "imgui/imgui.h"
+
+#include <cmath>
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/style.h"
+#include "app/rom.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+/**
+ * @class GfxGroupEditor
+ * @brief Manage graphics group configurations in a Rom.
+ */
+class GfxGroupEditor : public SharedRom {
+ public:
+  absl::Status Update();
+
+  void DrawBlocksetViewer(bool sheet_only = false);
+  void DrawRoomsetViewer();
+  void DrawSpritesetViewer(bool sheet_only = false);
+  void DrawPaletteViewer();
+
+  void SetSelectedBlockset(uint8_t blockset) { selected_blockset_ = blockset; }
+  void SetSelectedRoomset(uint8_t roomset) { selected_roomset_ = roomset; }
+  void SetSelectedSpriteset(uint8_t spriteset) {
+    selected_spriteset_ = spriteset;
+  }
+
+  void InitBlockset(gfx::Bitmap* tile16_blockset) {
+    tile16_blockset_bmp_ = tile16_blockset;
+  }
+
+ private:
+  int preview_palette_id_ = 0;
+  int last_sheet_id_ = 0;
+  uint8_t selected_blockset_ = 0;
+  uint8_t selected_roomset_ = 0;
+  uint8_t selected_spriteset_ = 0;
+  uint8_t selected_paletteset_ = 0;
+
+  gui::Canvas blockset_canvas_;
+  gui::Canvas roomset_canvas_;
+  gui::Canvas spriteset_canvas_;
+
+  gfx::SnesPalette palette_;
+  gfx::PaletteGroup palette_group_;
+  gfx::Bitmap* tile16_blockset_bmp_;
+
+  std::vector<Bytes> tile16_individual_data_;
+  std::vector<gfx::Bitmap> tile16_individual_;
+
+  gui::BitmapViewer gfx_group_viewer_;
+  zelda3::overworld::Overworld overworld_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+#endif  // YAZE_APP_EDITOR_GFX_GROUP_EDITOR_H

src/app/editor/graphics/graphics_editor.cc

@@ -0,0 +1,844 @@
+#include "graphics_editor.h"
+
+#include "ImGuiFileDialog/ImGuiFileDialog.h"
+#include "imgui/imgui.h"
+#include "imgui/misc/cpp/imgui_stdlib.h"
+#include "imgui_memory_editor.h"
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/core/platform/clipboard.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/compression.h"
+#include "app/gfx/scad_format.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/asset_browser.h"
+#include "app/gui/canvas.h"
+#include "app/gui/color.h"
+#include "app/gui/input.h"
+#include "app/gui/style.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using gfx::kPaletteGroupAddressesKeys;
+using ImGui::Button;
+using ImGui::InputInt;
+using ImGui::InputText;
+using ImGui::SameLine;
+using ImGui::TableNextColumn;
+
+static constexpr absl::string_view kGfxToolsetColumnNames[] = {
+    "#memoryEditor",
+    "##separator_gfx1",
+};
+
+constexpr ImGuiTableFlags kGfxEditTableFlags =
+    ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable |
+    ImGuiTableFlags_Reorderable | ImGuiTableFlags_Hideable |
+    ImGuiTableFlags_SizingFixedFit;
+
+constexpr ImGuiTabBarFlags kGfxEditTabBarFlags =
+    ImGuiTabBarFlags_AutoSelectNewTabs | ImGuiTabBarFlags_Reorderable |
+    ImGuiTabBarFlags_FittingPolicyResizeDown |
+    ImGuiTabBarFlags_TabListPopupButton;
+
+constexpr ImGuiTableFlags kGfxEditFlags = ImGuiTableFlags_Reorderable |
+                                          ImGuiTableFlags_Resizable |
+                                          ImGuiTableFlags_SizingStretchSame;
+
+absl::Status GraphicsEditor::Update() {
+  TAB_BAR("##TabBar")
+  status_ = UpdateGfxEdit();
+  TAB_ITEM("Sheet Browser")
+  if (asset_browser_.Initialized == false) {
+    asset_browser_.Initialize(rom()->mutable_bitmap_manager());
+  }
+  asset_browser_.Draw(rom()->mutable_bitmap_manager());
+
+  END_TAB_ITEM()
+  status_ = UpdateScadView();
+  status_ = UpdateLinkGfxView();
+  END_TAB_BAR()
+  CLEAR_AND_RETURN_STATUS(status_)
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::UpdateGfxEdit() {
+  TAB_ITEM("Sheet Editor")
+
+  if (ImGui::BeginTable("##GfxEditTable", 3, kGfxEditTableFlags,
+                        ImVec2(0, 0))) {
+    for (const auto& name :
+         {"Tilesheets", "Current Graphics", "Palette Controls"})
+      ImGui::TableSetupColumn(name);
+
+    ImGui::TableHeadersRow();
+
+    NEXT_COLUMN();
+    status_ = UpdateGfxSheetList();
+
+    NEXT_COLUMN();
+    if (rom()->is_loaded()) {
+      DrawGfxEditToolset();
+      status_ = UpdateGfxTabView();
+    }
+
+    NEXT_COLUMN();
+    if (rom()->is_loaded()) {
+      status_ = UpdatePaletteColumn();
+    }
+  }
+  ImGui::EndTable();
+
+  END_TAB_ITEM()
+  return absl::OkStatus();
+}
+
+void GraphicsEditor::DrawGfxEditToolset() {
+  if (ImGui::BeginTable("##GfxEditToolset", 9, ImGuiTableFlags_SizingFixedFit,
+                        ImVec2(0, 0))) {
+    for (const auto& name :
+         {"Select", "Pencil", "Fill", "Copy Sheet", "Paste Sheet", "Zoom Out",
+          "Zoom In", "Current Color", "Tile Size"})
+      ImGui::TableSetupColumn(name);
+
+    TableNextColumn();
+    if (Button(ICON_MD_SELECT_ALL)) {
+      gfx_edit_mode_ = GfxEditMode::kSelect;
+    }
+
+    TableNextColumn();
+    if (Button(ICON_MD_DRAW)) {
+      gfx_edit_mode_ = GfxEditMode::kPencil;
+    }
+    HOVER_HINT("Draw with current color");
+
+    TableNextColumn();
+    if (Button(ICON_MD_FORMAT_COLOR_FILL)) {
+      gfx_edit_mode_ = GfxEditMode::kFill;
+    }
+    HOVER_HINT("Fill with current color");
+
+    TableNextColumn();
+    if (Button(ICON_MD_CONTENT_COPY)) {
+      std::vector<uint8_t> png_data =
+          rom()->bitmap_manager().shared_bitmap(current_sheet_).GetPngData();
+      CopyImageToClipboard(png_data);
+    }
+    HOVER_HINT("Copy to Clipboard");
+
+    TableNextColumn();
+    if (Button(ICON_MD_CONTENT_PASTE)) {
+      std::vector<uint8_t> png_data;
+      int width, height;
+      GetImageFromClipboard(png_data, width, height);
+      if (png_data.size() > 0) {
+        rom()
+            ->mutable_bitmap_manager()
+            ->mutable_bitmap(current_sheet_)
+            ->Create(width, height, 8, png_data);
+        rom()->UpdateBitmap(
+            rom()->mutable_bitmap_manager()->mutable_bitmap(current_sheet_));
+      }
+    }
+    HOVER_HINT("Paste from Clipboard");
+
+    TableNextColumn();
+    if (Button(ICON_MD_ZOOM_OUT)) {
+      if (current_scale_ >= 0.0f) {
+        current_scale_ -= 1.0f;
+      }
+    }
+
+    TableNextColumn();
+    if (Button(ICON_MD_ZOOM_IN)) {
+      if (current_scale_ <= 16.0f) {
+        current_scale_ += 1.0f;
+      }
+    }
+
+    TableNextColumn();
+    auto bitmap = rom()->bitmap_manager()[current_sheet_];
+    auto palette = bitmap.palette();
+    for (int i = 0; i < 8; i++) {
+      ImGui::SameLine();
+      auto color =
+          ImVec4(palette[i].rgb().x / 255.0f, palette[i].rgb().y / 255.0f,
+                 palette[i].rgb().z / 255.0f, 255.0f);
+      if (ImGui::ColorButton(absl::StrFormat("Palette Color %d", i).c_str(),
+                             color)) {
+        current_color_ = color;
+      }
+    }
+
+    TableNextColumn();
+    gui::InputHexByte("Tile Size", &tile_size_);
+
+    ImGui::EndTable();
+  }
+}
+
+absl::Status GraphicsEditor::UpdateGfxSheetList() {
+  ImGui::BeginChild(
+      "##GfxEditChild", ImVec2(0, 0), true,
+      ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_AlwaysVerticalScrollbar);
+  ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
+  // TODO: Update the interaction for multi select on sheets
+  static ImGuiSelectionBasicStorage selection;
+  ImGuiMultiSelectFlags flags =
+      ImGuiMultiSelectFlags_ClearOnEscape | ImGuiMultiSelectFlags_BoxSelect1d;
+  ImGuiMultiSelectIO* ms_io = ImGui::BeginMultiSelect(
+      flags, selection.Size, rom()->bitmap_manager().size());
+  selection.ApplyRequests(ms_io);
+  ImGuiListClipper clipper;
+  clipper.Begin(rom()->bitmap_manager().size());
+  if (ms_io->RangeSrcItem != -1)
+    clipper.IncludeItemByIndex(
+        (int)ms_io->RangeSrcItem);  // Ensure RangeSrc item is not clipped.
+
+  for (auto& [key, value] : rom()->bitmap_manager()) {
+    ImGui::BeginChild(absl::StrFormat("##GfxSheet%02X", key).c_str(),
+                      ImVec2(0x100 + 1, 0x40 + 1), true,
+                      ImGuiWindowFlags_NoDecoration);
+    ImGui::PopStyleVar();
+    gui::Canvas graphics_bin_canvas_;
+
+    graphics_bin_canvas_.DrawBackground(ImVec2(0x100 + 1, 0x40 + 1));
+    graphics_bin_canvas_.DrawContextMenu();
+    if (value.is_active()) {
+      auto texture = value.texture();
+      graphics_bin_canvas_.draw_list()->AddImage(
+          (void*)texture,
+          ImVec2(graphics_bin_canvas_.zero_point().x + 2,
+                 graphics_bin_canvas_.zero_point().y + 2),
+          ImVec2(graphics_bin_canvas_.zero_point().x +
+                     value.width() * sheet_scale_,
+                 graphics_bin_canvas_.zero_point().y +
+                     value.height() * sheet_scale_));
+
+      if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) {
+        current_sheet_ = key;
+        open_sheets_.insert(key);
+      }
+
+      // Add a slightly transparent rectangle behind the text
+      ImVec2 text_pos(graphics_bin_canvas_.zero_point().x + 2,
+                      graphics_bin_canvas_.zero_point().y + 2);
+      ImVec2 text_size =
+          ImGui::CalcTextSize(absl::StrFormat("%02X", key).c_str());
+      ImVec2 rent_min(text_pos.x, text_pos.y);
+      ImVec2 rent_max(text_pos.x + text_size.x, text_pos.y + text_size.y);
+
+      graphics_bin_canvas_.draw_list()->AddRectFilled(rent_min, rent_max,
+                                                      IM_COL32(0, 125, 0, 128));
+
+      graphics_bin_canvas_.draw_list()->AddText(
+          text_pos, IM_COL32(125, 255, 125, 255),
+          absl::StrFormat("%02X", key).c_str());
+    }
+    graphics_bin_canvas_.DrawGrid(16.0f);
+    graphics_bin_canvas_.DrawOverlay();
+
+    ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
+    ImGui::EndChild();
+  }
+  ImGui::PopStyleVar();
+  ms_io = ImGui::EndMultiSelect();
+  selection.ApplyRequests(ms_io);
+  ImGui::EndChild();
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::UpdateGfxTabView() {
+  static int next_tab_id = 0;
+
+  if (ImGui::BeginTabBar("##GfxEditTabBar", kGfxEditTabBarFlags)) {
+    if (ImGui::TabItemButton(ICON_MD_ADD, ImGuiTabItemFlags_Trailing |
+                                              ImGuiTabItemFlags_NoTooltip)) {
+      open_sheets_.insert(next_tab_id++);
+    }
+
+    for (auto& sheet_id : open_sheets_) {
+      bool open = true;
+      if (ImGui::BeginTabItem(absl::StrFormat("%d", sheet_id).c_str(), &open,
+                              ImGuiTabItemFlags_None)) {
+        current_sheet_ = sheet_id;
+        if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
+          release_queue_.push(sheet_id);
+        }
+        if (ImGui::IsItemHovered()) {
+          if (ImGui::IsMouseDragging(ImGuiMouseButton_Left)) {
+            release_queue_.push(sheet_id);
+            child_window_sheets_.insert(sheet_id);
+          }
+        }
+
+        const auto child_id =
+            absl::StrFormat("##GfxEditPaletteChildWindow%d", sheet_id);
+        ImGui::BeginChild(child_id.c_str(), ImVec2(0, 0), true,
+                          ImGuiWindowFlags_NoDecoration |
+                              ImGuiWindowFlags_AlwaysVerticalScrollbar |
+                              ImGuiWindowFlags_AlwaysHorizontalScrollbar);
+
+        gfx::Bitmap& current_bitmap =
+            *rom()->mutable_bitmap_manager()->mutable_bitmap(sheet_id);
+
+        auto draw_tile_event = [&]() {
+          current_sheet_canvas_.DrawTileOnBitmap(tile_size_, &current_bitmap,
+                                                 current_color_);
+          rom()->UpdateBitmap(&current_bitmap, true);
+        };
+
+        current_sheet_canvas_.UpdateColorPainter(
+            rom()->bitmap_manager()[sheet_id], current_color_, draw_tile_event,
+            tile_size_, current_scale_);
+
+        ImGui::EndChild();
+        ImGui::EndTabItem();
+      }
+
+      if (!open) release_queue_.push(sheet_id);
+    }
+
+    ImGui::EndTabBar();
+  }
+
+  // Release any tabs that were closed
+  while (!release_queue_.empty()) {
+    auto sheet_id = release_queue_.top();
+    open_sheets_.erase(sheet_id);
+    release_queue_.pop();
+  }
+
+  // Draw any child windows that were created
+  if (!child_window_sheets_.empty()) {
+    int id_to_release = -1;
+    for (const auto& id : child_window_sheets_) {
+      bool active = true;
+      ImGui::SetNextWindowPos(ImGui::GetIO().MousePos, ImGuiCond_Once);
+      ImGui::SetNextWindowSize(ImVec2(0x100 + 1 * 16, 0x40 + 1 * 16),
+                               ImGuiCond_Once);
+      ImGui::Begin(absl::StrFormat("##GfxEditPaletteChildWindow%d", id).c_str(),
+                   &active, ImGuiWindowFlags_AlwaysUseWindowPadding);
+      current_sheet_ = id;
+      //  ImVec2(0x100, 0x40),
+      current_sheet_canvas_.UpdateColorPainter(
+          rom()->bitmap_manager()[id], current_color_,
+          [&]() {
+
+          },
+          tile_size_, current_scale_);
+      ImGui::End();
+
+      if (active == false) {
+        id_to_release = id;
+      }
+    }
+    if (id_to_release != -1) {
+      child_window_sheets_.erase(id_to_release);
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::UpdatePaletteColumn() {
+  if (rom()->is_loaded()) {
+    auto palette_group = *rom()->palette_group().get_group(
+        kPaletteGroupAddressesKeys[edit_palette_group_name_index_]);
+    auto palette = palette_group.palette(edit_palette_index_);
+    gui::TextWithSeparators("ROM Palette");
+    ImGui::SetNextItemWidth(100.f);
+    ImGui::Combo("Palette Group", (int*)&edit_palette_group_name_index_,
+                 kPaletteGroupAddressesKeys,
+                 IM_ARRAYSIZE(kPaletteGroupAddressesKeys));
+    ImGui::SetNextItemWidth(100.f);
+    gui::InputHex("Palette Group Index", &edit_palette_index_);
+
+    gui::SelectablePalettePipeline(edit_palette_sub_index_, refresh_graphics_,
+                                   palette);
+
+    if (refresh_graphics_ && !open_sheets_.empty()) {
+      RETURN_IF_ERROR(
+          rom()->bitmap_manager()[current_sheet_].ApplyPaletteWithTransparent(
+              palette, edit_palette_sub_index_));
+      rom()->UpdateBitmap(
+          rom()->mutable_bitmap_manager()->mutable_bitmap(current_sheet_),
+          true);
+      refresh_graphics_ = false;
+    }
+  }
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::UpdateLinkGfxView() {
+  TAB_ITEM("Player Animations")
+
+  if (ImGui::BeginTable("##PlayerAnimationTable", 3, kGfxEditTableFlags,
+                        ImVec2(0, 0))) {
+    for (const auto& name : {"Canvas", "Animation Steps", "Properties"})
+      ImGui::TableSetupColumn(name);
+
+    ImGui::TableHeadersRow();
+
+    NEXT_COLUMN();
+    link_canvas_.DrawBackground();
+    link_canvas_.DrawGrid(16.0f);
+
+    int i = 0;
+    for (auto [key, link_sheet] : *rom()->mutable_link_graphics()) {
+      int x_offset = 0;
+      int y_offset = core::kTilesheetHeight * i * 4;
+      link_canvas_.DrawContextMenu(&link_sheet);
+      link_canvas_.DrawBitmap(link_sheet, x_offset, y_offset, 4);
+      i++;
+    }
+    link_canvas_.DrawOverlay();
+    link_canvas_.DrawGrid();
+
+    NEXT_COLUMN();
+    ImGui::Text("Placeholder");
+
+    NEXT_COLUMN();
+    if (ImGui::Button("Load Link Graphics (Experimental)")) {
+      if (rom()->is_loaded()) {
+        // Load Links graphics from the ROM
+        RETURN_IF_ERROR(rom()->LoadLinkGraphics());
+
+        // Split it into the pose data frames
+        // Create an animation step display for the poses
+        // Allow the user to modify the frames used in an anim step
+        // LinkOAM_AnimationSteps:
+        // #_0D85FB
+      }
+    }
+  }
+  ImGui::EndTable();
+
+  END_TAB_ITEM()
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::UpdateScadView() {
+  TAB_ITEM("Prototype")
+
+  RETURN_IF_ERROR(DrawToolset())
+
+  if (open_memory_editor_) {
+    ImGui::Begin("Memory Editor", &open_memory_editor_);
+    RETURN_IF_ERROR(DrawMemoryEditor())
+    ImGui::End();
+  }
+
+  BEGIN_TABLE("#gfxEditTable", 4, kGfxEditFlags)
+  SETUP_COLUMN("File Import (BIN, CGX, ROM)")
+  SETUP_COLUMN("Palette (COL)")
+  ImGui::TableSetupColumn("Tilemaps and Objects (SCR, PNL, OBJ)",
+                          ImGuiTableColumnFlags_WidthFixed);
+  SETUP_COLUMN("Graphics Preview")
+  TABLE_HEADERS()
+  NEXT_COLUMN() {
+    status_ = DrawCgxImport();
+    status_ = DrawClipboardImport();
+    status_ = DrawFileImport();
+    status_ = DrawExperimentalFeatures();
+  }
+
+  NEXT_COLUMN() { status_ = DrawPaletteControls(); }
+
+  NEXT_COLUMN()
+  gui::BitmapCanvasPipeline(scr_canvas_, scr_bitmap_, 0x200, 0x200, 0x20,
+                            scr_loaded_, false, 0);
+  status_ = DrawScrImport();
+
+  NEXT_COLUMN()
+  if (super_donkey_) {
+    if (refresh_graphics_) {
+      for (int i = 0; i < graphics_bin_.size(); i++) {
+        status_ = graphics_bin_[i].ApplyPalette(
+            col_file_palette_group_[current_palette_index_]);
+        rom()->UpdateBitmap(&graphics_bin_[i]);
+      }
+      refresh_graphics_ = false;
+    }
+    // Load the full graphics space from `super_donkey_1.bin`
+    gui::GraphicsBinCanvasPipeline(0x100, 0x40, 0x20, num_sheets_to_load_, 3,
+                                   super_donkey_, graphics_bin_);
+  } else if (cgx_loaded_ && col_file_) {
+    // Load the CGX graphics
+    gui::BitmapCanvasPipeline(import_canvas_, cgx_bitmap_, 0x100, 16384, 0x20,
+                              cgx_loaded_, true, 5);
+  } else {
+    // Load the BIN/Clipboard Graphics
+    gui::BitmapCanvasPipeline(import_canvas_, bin_bitmap_, 0x100, 16384, 0x20,
+                              gfx_loaded_, true, 2);
+  }
+  END_TABLE()
+
+  END_TAB_ITEM()
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawToolset() {
+  if (ImGui::BeginTable("GraphicsToolset", 2, ImGuiTableFlags_SizingFixedFit,
+                        ImVec2(0, 0))) {
+    for (const auto& name : kGfxToolsetColumnNames)
+      ImGui::TableSetupColumn(name.data());
+
+    TableNextColumn();
+    if (Button(ICON_MD_MEMORY)) {
+      if (!open_memory_editor_) {
+        open_memory_editor_ = true;
+      } else {
+        open_memory_editor_ = false;
+      }
+    }
+
+    TEXT_COLUMN("Open Memory Editor")  // Separator
+
+    ImGui::EndTable();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawCgxImport() {
+  gui::TextWithSeparators("Cgx Import");
+  InputInt("BPP", &current_bpp_);
+
+  InputText("##CGXFile", cgx_file_name_, sizeof(cgx_file_name_));
+  SameLine();
+
+  gui::FileDialogPipeline("ImportCgxKey", ".CGX,.cgx\0", "Open CGX", [this]() {
+    strncpy(cgx_file_path_,
+            ImGuiFileDialog::Instance()->GetFilePathName().c_str(),
+            sizeof(cgx_file_path_));
+    strncpy(cgx_file_name_,
+            ImGuiFileDialog::Instance()->GetCurrentFileName().c_str(),
+            sizeof(cgx_file_name_));
+    is_open_ = true;
+    cgx_loaded_ = true;
+  });
+
+  if (ImGui::Button("Copy CGX Path")) {
+    ImGui::SetClipboardText(cgx_file_path_);
+  }
+
+  if (ImGui::Button("Load CGX Data")) {
+    status_ = gfx::scad_format::LoadCgx(current_bpp_, cgx_file_path_, cgx_data_,
+                                        decoded_cgx_, extra_cgx_data_);
+
+    cgx_bitmap_.Create(0x80, 0x200, 8, decoded_cgx_);
+    if (col_file_) {
+      cgx_bitmap_.ApplyPalette(decoded_col_);
+      rom()->RenderBitmap(&cgx_bitmap_);
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawScrImport() {
+  InputText("##ScrFile", scr_file_name_, sizeof(scr_file_name_));
+
+  gui::FileDialogPipeline(
+      "ImportScrKey", ".SCR,.scr,.BAK\0", "Open SCR", [this]() {
+        strncpy(scr_file_path_,
+                ImGuiFileDialog::Instance()->GetFilePathName().c_str(),
+                sizeof(scr_file_path_));
+        strncpy(scr_file_name_,
+                ImGuiFileDialog::Instance()->GetCurrentFileName().c_str(),
+                sizeof(scr_file_name_));
+        is_open_ = true;
+        scr_loaded_ = true;
+      });
+
+  InputInt("SCR Mod", &scr_mod_value_);
+
+  if (ImGui::Button("Load Scr Data")) {
+    status_ =
+        gfx::scad_format::LoadScr(scr_file_path_, scr_mod_value_, scr_data_);
+
+    decoded_scr_data_.resize(0x100 * 0x100);
+    status_ = gfx::scad_format::DrawScrWithCgx(current_bpp_, scr_data_,
+                                               decoded_scr_data_, decoded_cgx_);
+
+    scr_bitmap_.Create(0x100, 0x100, 8, decoded_scr_data_);
+    if (scr_loaded_) {
+      scr_bitmap_.ApplyPalette(decoded_col_);
+      rom()->RenderBitmap(&scr_bitmap_);
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawPaletteControls() {
+  gui::TextWithSeparators("COL Import");
+  InputText("##ColFile", col_file_name_, sizeof(col_file_name_));
+  SameLine();
+
+  gui::FileDialogPipeline(
+      "ImportColKey", ".COL,.col,.BAK,.bak\0", "Open COL", [this]() {
+        strncpy(col_file_path_,
+                ImGuiFileDialog::Instance()->GetFilePathName().c_str(),
+                sizeof(col_file_path_));
+        strncpy(col_file_name_,
+                ImGuiFileDialog::Instance()->GetCurrentFileName().c_str(),
+                sizeof(col_file_name_));
+        status_ = temp_rom_.LoadFromFile(col_file_path_,
+                                         /*z3_load=*/false);
+        auto col_data_ = gfx::GetColFileData(temp_rom_.data());
+        if (col_file_palette_group_.size() != 0) {
+          col_file_palette_group_.Clear();
+        }
+        auto col_file_palette_group_status =
+            gfx::CreatePaletteGroupFromColFile(col_data_);
+        if (col_file_palette_group_status.ok()) {
+          col_file_palette_group_ = col_file_palette_group_status.value();
+        }
+        col_file_palette_ = gfx::SnesPalette(col_data_);
+
+        // gigaleak dev format based code
+        decoded_col_ = gfx::scad_format::DecodeColFile(col_file_path_);
+        col_file_ = true;
+        is_open_ = true;
+      });
+
+  if (ImGui::Button("Copy Col Path")) {
+    ImGui::SetClipboardText(col_file_path_);
+  }
+
+  if (rom()->is_loaded()) {
+    gui::TextWithSeparators("ROM Palette");
+    gui::InputHex("Palette Index", &current_palette_index_);
+    ImGui::Combo("Palette", &current_palette_, kPaletteGroupAddressesKeys,
+                 IM_ARRAYSIZE(kPaletteGroupAddressesKeys));
+  }
+
+  if (col_file_palette_.size() != 0) {
+    gui::SelectablePalettePipeline(current_palette_index_, refresh_graphics_,
+                                   col_file_palette_);
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawObjImport() {
+  gui::TextWithSeparators("OBJ Import");
+
+  InputText("##ObjFile", obj_file_path_, sizeof(obj_file_path_));
+  SameLine();
+
+  gui::FileDialogPipeline(
+      "ImportObjKey", ".obj,.OBJ,.bak,.BAK\0", "Open OBJ", [this]() {
+        strncpy(file_path_,
+                ImGuiFileDialog::Instance()->GetFilePathName().c_str(),
+                sizeof(file_path_));
+        status_ = temp_rom_.LoadFromFile(file_path_);
+        is_open_ = true;
+      });
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawTilemapImport() {
+  gui::TextWithSeparators("Tilemap Import");
+
+  InputText("##TMapFile", tilemap_file_path_, sizeof(tilemap_file_path_));
+  SameLine();
+
+  gui::FileDialogPipeline(
+      "ImportTilemapKey", ".DAT,.dat,.BIN,.bin,.hex,.HEX\0", "Open Tilemap",
+      [this]() {
+        strncpy(tilemap_file_path_,
+                ImGuiFileDialog::Instance()->GetFilePathName().c_str(),
+                sizeof(tilemap_file_path_));
+        status_ = tilemap_rom_.LoadFromFile(tilemap_file_path_);
+
+        // Extract the high and low bytes from the file.
+        auto decomp_sheet = gfx::lc_lz2::DecompressV2(
+            tilemap_rom_.data(), gfx::lc_lz2::kNintendoMode1);
+        tilemap_loaded_ = true;
+        is_open_ = true;
+      });
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawFileImport() {
+  gui::TextWithSeparators("BIN Import");
+
+  InputText("##ROMFile", file_path_, sizeof(file_path_));
+  SameLine();
+
+  gui::FileDialogPipeline("ImportDlgKey", ".bin,.hex\0", "Open BIN", [this]() {
+    strncpy(file_path_, ImGuiFileDialog::Instance()->GetFilePathName().c_str(),
+            sizeof(file_path_));
+    status_ = temp_rom_.LoadFromFile(file_path_);
+    is_open_ = true;
+  });
+
+  if (Button("Copy File Path")) {
+    ImGui::SetClipboardText(file_path_);
+  }
+
+  gui::InputHex("BIN Offset", &current_offset_);
+  gui::InputHex("BIN Size", &bin_size_);
+
+  if (Button("Decompress BIN")) {
+    if (strlen(file_path_) > 0) {
+      RETURN_IF_ERROR(DecompressImportData(bin_size_))
+    } else {
+      return absl::InvalidArgumentError(
+          "Please select a file before importing.");
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawClipboardImport() {
+  gui::TextWithSeparators("Clipboard Import");
+  if (Button("Paste From Clipboard")) {
+    const char* text = ImGui::GetClipboardText();
+    if (text) {
+      const auto clipboard_data = Bytes(text, text + strlen(text));
+      ImGui::MemFree((void*)text);
+      status_ = temp_rom_.LoadFromBytes(clipboard_data);
+      is_open_ = true;
+      open_memory_editor_ = true;
+    }
+  }
+  gui::InputHex("Offset", &clipboard_offset_);
+  gui::InputHex("Size", &clipboard_size_);
+  gui::InputHex("Num Sheets", &num_sheets_to_load_);
+
+  if (Button("Decompress Clipboard Data")) {
+    if (temp_rom_.is_loaded()) {
+      status_ = DecompressImportData(0x40000);
+    } else {
+      status_ = absl::InvalidArgumentError(
+          "Please paste data into the clipboard before "
+          "decompressing.");
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawExperimentalFeatures() {
+  gui::TextWithSeparators("Experimental");
+  if (Button("Decompress Super Donkey Full")) {
+    if (strlen(file_path_) > 0) {
+      RETURN_IF_ERROR(DecompressSuperDonkey())
+    } else {
+      return absl::InvalidArgumentError(
+          "Please select `super_donkey_1.bin` before "
+          "importing.");
+    }
+  }
+  ImGui::SetItemTooltip(
+      "Requires `super_donkey_1.bin` to be imported under the "
+      "BIN import section.");
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DrawMemoryEditor() {
+  std::string title = "Memory Editor";
+  if (is_open_) {
+    static MemoryEditor mem_edit;
+    mem_edit.DrawWindow(title.c_str(), temp_rom_.data(), temp_rom_.size());
+  }
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DecompressImportData(int size) {
+  ASSIGN_OR_RETURN(import_data_, gfx::lc_lz2::DecompressV2(
+                                     temp_rom_.data(), current_offset_, size))
+
+  auto converted_sheet = gfx::SnesTo8bppSheet(import_data_, 3);
+  bin_bitmap_.Create(core::kTilesheetWidth, 0x2000, core::kTilesheetDepth,
+                     converted_sheet);
+
+  if (rom()->is_loaded()) {
+    auto palette_group = rom()->palette_group().overworld_animated;
+    z3_rom_palette_ = palette_group[current_palette_];
+    if (col_file_) {
+      status_ = bin_bitmap_.ApplyPalette(col_file_palette_);
+    } else {
+      status_ = bin_bitmap_.ApplyPalette(z3_rom_palette_);
+    }
+  }
+
+  rom()->RenderBitmap(&bin_bitmap_);
+  gfx_loaded_ = true;
+
+  return absl::OkStatus();
+}
+
+absl::Status GraphicsEditor::DecompressSuperDonkey() {
+  int i = 0;
+  for (const auto& offset : kSuperDonkeyTiles) {
+    int offset_value =
+        std::stoi(offset, nullptr, 16);  // convert hex string to int
+    ASSIGN_OR_RETURN(
+        auto decompressed_data,
+        gfx::lc_lz2::DecompressV2(temp_rom_.data(), offset_value, 0x1000))
+    auto converted_sheet = gfx::SnesTo8bppSheet(decompressed_data, 3);
+    graphics_bin_[i] =
+        gfx::Bitmap(core::kTilesheetWidth, core::kTilesheetHeight,
+                    core::kTilesheetDepth, converted_sheet);
+    if (col_file_) {
+      status_ = graphics_bin_[i].ApplyPalette(
+          col_file_palette_group_[current_palette_index_]);
+    } else {
+      // ROM palette
+
+      auto palette_group = rom()->palette_group().get_group(
+          kPaletteGroupAddressesKeys[current_palette_]);
+      z3_rom_palette_ = *palette_group->mutable_palette(current_palette_index_);
+      status_ = graphics_bin_[i].ApplyPalette(z3_rom_palette_);
+    }
+
+    rom()->RenderBitmap(&graphics_bin_[i]);
+    i++;
+  }
+
+  for (const auto& offset : kSuperDonkeySprites) {
+    int offset_value =
+        std::stoi(offset, nullptr, 16);  // convert hex string to int
+    ASSIGN_OR_RETURN(
+        auto decompressed_data,
+        gfx::lc_lz2::DecompressV2(temp_rom_.data(), offset_value, 0x1000))
+    auto converted_sheet = gfx::SnesTo8bppSheet(decompressed_data, 3);
+    graphics_bin_[i] =
+        gfx::Bitmap(core::kTilesheetWidth, core::kTilesheetHeight,
+                    core::kTilesheetDepth, converted_sheet);
+    if (col_file_) {
+      status_ = graphics_bin_[i].ApplyPalette(
+          col_file_palette_group_[current_palette_index_]);
+    } else {
+      // ROM palette
+      auto palette_group = rom()->palette_group().get_group(
+          kPaletteGroupAddressesKeys[current_palette_]);
+      z3_rom_palette_ = *palette_group->mutable_palette(current_palette_index_);
+      status_ = graphics_bin_[i].ApplyPalette(z3_rom_palette_);
+    }
+
+    rom()->RenderBitmap(&graphics_bin_[i]);
+    i++;
+  }
+  super_donkey_ = true;
+  num_sheets_to_load_ = i;
+
+  return absl::OkStatus();
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/graphics/graphics_editor.h

@@ -0,0 +1,205 @@
+#ifndef YAZE_APP_EDITOR_GRAPHICS_EDITOR_H
+#define YAZE_APP_EDITOR_GRAPHICS_EDITOR_H
+
+#include "ImGuiFileDialog/ImGuiFileDialog.h"
+#include "imgui/imgui.h"
+#include "imgui/misc/cpp/imgui_stdlib.h"
+#include "imgui_memory_editor.h"
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/asset_browser.h"
+#include "app/gui/canvas.h"
+#include "app/gui/input.h"
+#include "app/rom.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+// "99973","A3D80",
+
+const std::string kSuperDonkeyTiles[] = {
+    "97C05", "98219", "9871E", "98C00", "99084", "995AF", "99DE0", "9A27E",
+    "9A741", "9AC31", "9B07E", "9B55C", "9B963", "9BB99", "9C009", "9C4B4",
+    "9C92B", "9CDD6", "9D2C2", "9E037", "9E527", "9EA56", "9EF65", "9FCD1",
+    "A0193", "A059E", "A0B17", "A0FB6", "A14A5", "A1988", "A1E66", "A232B",
+    "A27F0", "A2B6E", "A302C", "A3453", "A38CA", "A42BB", "A470C", "A4BA9",
+    "A5089", "A5385", "A5742", "A5BCC", "A6017", "A6361", "A66F8"};
+
+const std::string kSuperDonkeySprites[] = {
+    "A8E5D", "A9435", "A9934", "A9D83", "AA2F1", "AA6D4", "AABE4", "AB127",
+    "AB65A", "ABBDD", "AC38D", "AC797", "ACCC8", "AD0AE", "AD245", "AD554",
+    "ADAAC", "ADECC", "AE453", "AE9D2", "AEF40", "AF3C9", "AF92E", "AFE9D",
+    "B03D2", "B09AC", "B0F0C", "B1430", "B1859", "B1E01", "B229A", "B2854",
+    "B2D27", "B31D7", "B3B58", "B40B5", "B45A5", "B4D64", "B5031", "B555F",
+    "B5F30", "B6858", "B70DD", "B7526", "B79EC", "B7C83", "B80F7", "B85CC",
+    "B8A3F", "B8F97", "B94F2", "B9A20", "B9E9A", "BA3A2", "BA8F6", "BACDC",
+    "BB1F9", "BB781", "BBCCA", "BC26D", "BC7D4", "BCBB0", "BD082", "BD5FC",
+    "BE115", "BE5C2", "BEB63", "BF0CB", "BF607", "BFA55", "BFD71", "C017D",
+    "C0567", "C0981", "C0BA7", "C116D", "C166A", "C1FE0", "C24CE", "C2B19"};
+
+/**
+ * @class GraphicsEditor
+ * @brief Allows the user to edit graphics sheets from the game or view
+ * prototype graphics.
+ *
+ * The GraphicsEditor class is responsible for providing functionality to edit
+ * graphics sheets from the game or view prototype graphics of Link to the Past
+ * from the CGX, SCR, and OBJ formats. It provides various methods to update
+ * different components of the graphics editor, such as the graphics edit tab,
+ * link graphics view, and prototype graphics viewer. It also includes import
+ * functions for different file formats, as well as other utility functions for
+ * drawing toolsets, palette controls, clipboard imports, experimental features,
+ * and memory editor.
+ */
+class GraphicsEditor : public SharedRom, public Editor {
+ public:
+  GraphicsEditor() { type_ = EditorType::kGraphics; }
+
+  absl::Status Update() override;
+
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+ private:
+  enum class GfxEditMode {
+    kSelect,
+    kPencil,
+    kFill,
+  };
+
+  // Graphics Editor Tab
+  absl::Status UpdateGfxEdit();
+  absl::Status UpdateGfxSheetList();
+  absl::Status UpdateGfxTabView();
+  absl::Status UpdatePaletteColumn();
+  void DrawGfxEditToolset();
+
+  // Link Graphics Edit Tab
+  absl::Status UpdateLinkGfxView();
+
+  // Prototype Graphics Viewer
+  absl::Status UpdateScadView();
+
+  // Import Functions
+  absl::Status DrawCgxImport();
+  absl::Status DrawScrImport();
+  absl::Status DrawFileImport();
+  absl::Status DrawObjImport();
+  absl::Status DrawTilemapImport();
+
+  // Other Functions
+  absl::Status DrawToolset();
+  absl::Status DrawPaletteControls();
+  absl::Status DrawClipboardImport();
+  absl::Status DrawExperimentalFeatures();
+  absl::Status DrawMemoryEditor();
+
+  absl::Status DecompressImportData(int size);
+  absl::Status DecompressSuperDonkey();
+
+  // Member Variables
+  ImVec4 current_color_;
+  uint16_t current_sheet_ = 0;
+  uint8_t tile_size_ = 0x01;
+  std::set<uint16_t> open_sheets_;
+  std::set<uint16_t> child_window_sheets_;
+  std::stack<uint16_t> release_queue_;
+  uint64_t edit_palette_group_name_index_ = 0;
+  uint64_t edit_palette_group_index_ = 0;
+  uint64_t edit_palette_index_ = 0;
+  uint64_t edit_palette_sub_index_ = 0;
+  float sheet_scale_ = 2.0f;
+  float current_scale_ = 4.0f;
+
+  // Prototype Graphics Viewer
+  int current_palette_ = 0;
+  uint64_t current_offset_ = 0;
+  uint64_t current_size_ = 0;
+  uint64_t current_palette_index_ = 0;
+  int current_bpp_ = 0;
+  int scr_mod_value_ = 0;
+
+  uint64_t num_sheets_to_load_ = 1;
+  uint64_t bin_size_ = 0;
+  uint64_t clipboard_offset_ = 0;
+  uint64_t clipboard_size_ = 0;
+
+  bool refresh_graphics_ = false;
+  bool open_memory_editor_ = false;
+  bool gfx_loaded_ = false;
+  bool is_open_ = false;
+  bool super_donkey_ = false;
+  bool col_file_ = false;
+  bool cgx_loaded_ = false;
+  bool scr_loaded_ = false;
+  bool obj_loaded_ = false;
+  bool tilemap_loaded_ = false;
+
+  char file_path_[256] = "";
+  char col_file_path_[256] = "";
+  char col_file_name_[256] = "";
+  char cgx_file_path_[256] = "";
+  char cgx_file_name_[256] = "";
+  char scr_file_path_[256] = "";
+  char scr_file_name_[256] = "";
+  char obj_file_path_[256] = "";
+  char tilemap_file_path_[256] = "";
+  char tilemap_file_name_[256] = "";
+
+  gui::GfxSheetAssetBrowser asset_browser_;
+
+  GfxEditMode gfx_edit_mode_ = GfxEditMode::kSelect;
+
+  Rom temp_rom_;
+  Rom tilemap_rom_;
+  zelda3::overworld::Overworld overworld_;
+  MemoryEditor cgx_memory_editor_;
+  MemoryEditor col_memory_editor_;
+  PaletteEditor palette_editor_;
+  Bytes import_data_;
+  Bytes graphics_buffer_;
+  std::vector<uint8_t> decoded_cgx_;
+  std::vector<uint8_t> cgx_data_;
+  std::vector<uint8_t> extra_cgx_data_;
+  std::vector<SDL_Color> decoded_col_;
+  std::vector<uint8_t> scr_data_;
+  std::vector<uint8_t> decoded_scr_data_;
+  gfx::Bitmap cgx_bitmap_;
+  gfx::Bitmap scr_bitmap_;
+  gfx::Bitmap bin_bitmap_;
+  gfx::Bitmap link_full_sheet_;
+  gfx::BitmapTable graphics_bin_;
+  gfx::BitmapTable clipboard_graphics_bin_;
+  gfx::BitmapTable link_graphics_;
+  gfx::PaletteGroup col_file_palette_group_;
+  gfx::SnesPalette z3_rom_palette_;
+  gfx::SnesPalette col_file_palette_;
+  gfx::SnesPalette link_palette_;
+  gui::Canvas import_canvas_;
+  gui::Canvas scr_canvas_;
+  gui::Canvas super_donkey_canvas_;
+  gui::Canvas current_sheet_canvas_{"CurrentSheetCanvas", ImVec2(0x80, 0x20),
+                                    gui::CanvasGridSize::k8x8};
+  gui::Canvas link_canvas_{
+      "LinkCanvas",
+      ImVec2(core::kTilesheetWidth * 4, core::kTilesheetHeight * 0x10 * 4),
+      gui::CanvasGridSize::k16x16};
+  absl::Status status_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_GRAPHICS_EDITOR_H

src/app/editor/graphics/palette_editor.cc

@@ -0,0 +1,469 @@
+#include "palette_editor.h"
+
+#include "imgui/imgui.h"
+
+#include "absl/status/status.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gui/canvas.h"
+#include "app/gui/color.h"
+#include "app/gui/icons.h"
+#include "app/gui/style.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::AcceptDragDropPayload;
+using ImGui::BeginChild;
+using ImGui::BeginDragDropTarget;
+using ImGui::BeginGroup;
+using ImGui::BeginPopup;
+using ImGui::BeginPopupContextItem;
+using ImGui::BeginTable;
+using ImGui::Button;
+using ImGui::ColorButton;
+using ImGui::ColorPicker4;
+using ImGui::EndChild;
+using ImGui::EndDragDropTarget;
+using ImGui::EndGroup;
+using ImGui::EndPopup;
+using ImGui::EndTable;
+using ImGui::GetContentRegionAvail;
+using ImGui::GetStyle;
+using ImGui::OpenPopup;
+using ImGui::PopID;
+using ImGui::PushID;
+using ImGui::SameLine;
+using ImGui::Selectable;
+using ImGui::Separator;
+using ImGui::SetClipboardText;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetColumnIndex;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+using ImGui::TreeNode;
+using ImGui::TreePop;
+
+using namespace gfx;
+
+constexpr ImGuiTableFlags kPaletteTableFlags =
+    ImGuiTableFlags_Reorderable | ImGuiTableFlags_Resizable |
+    ImGuiTableFlags_SizingStretchSame | ImGuiTableFlags_Hideable;
+
+constexpr ImGuiColorEditFlags kPalNoAlpha = ImGuiColorEditFlags_NoAlpha;
+
+constexpr ImGuiColorEditFlags kPalButtonFlags2 = ImGuiColorEditFlags_NoAlpha |
+                                                 ImGuiColorEditFlags_NoPicker |
+                                                 ImGuiColorEditFlags_NoTooltip;
+
+constexpr ImGuiColorEditFlags kColorPopupFlags =
+    ImGuiColorEditFlags_NoInputs | ImGuiColorEditFlags_NoAlpha;
+
+namespace {
+int CustomFormatString(char* buf, size_t buf_size, const char* fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+#ifdef IMGUI_USE_STB_SPRINTF
+  int w = stbsp_vsnprintf(buf, (int)buf_size, fmt, args);
+#else
+  int w = vsnprintf(buf, buf_size, fmt, args);
+#endif
+  va_end(args);
+  if (buf == nullptr) return w;
+  if (w == -1 || w >= (int)buf_size) w = (int)buf_size - 1;
+  buf[w] = 0;
+  return w;
+}
+
+static inline float color_saturate(float f) {
+  return (f < 0.0f) ? 0.0f : (f > 1.0f) ? 1.0f : f;
+}
+
+#define F32_TO_INT8_SAT(_VAL)            \
+  ((int)(color_saturate(_VAL) * 255.0f + \
+         0.5f))  // Saturated, always output 0..255
+}  // namespace
+
+absl::Status PaletteEditor::Update() {
+  if (rom()->is_loaded()) {
+    // Initialize the labels
+    for (int i = 0; i < kNumPalettes; i++) {
+      rom()->resource_label()->CreateOrGetLabel(
+          "Palette Group Name", std::to_string(i),
+          std::string(kPaletteGroupNames[i]));
+    }
+  } else {
+    return absl::NotFoundError("ROM not open, no palettes to display");
+  }
+
+  if (BeginTable("paletteEditorTable", 2, kPaletteTableFlags, ImVec2(0, 0))) {
+    TableSetupColumn("Palette Groups", ImGuiTableColumnFlags_WidthStretch,
+                     GetContentRegionAvail().x);
+    TableSetupColumn("Palette Sets and Metadata",
+                     ImGuiTableColumnFlags_WidthStretch,
+                     GetContentRegionAvail().x);
+    TableHeadersRow();
+    TableNextRow();
+    TableNextColumn();
+    DrawModifiedColors();
+
+    DrawCustomPalette();
+    Separator();
+    gui::SnesColorEdit4("Current Color Picker", &current_color_,
+                        ImGuiColorEditFlags_NoAlpha);
+    Separator();
+    DisplayCategoryTable();
+
+    TableNextColumn();
+    gfx_group_editor_.DrawPaletteViewer();
+    Separator();
+    static bool in_use = false;
+    ImGui::Checkbox("Palette in use? ", &in_use);
+    Separator();
+    static std::string palette_notes = "Notes about the palette";
+    ImGui::InputTextMultiline("Notes", palette_notes.data(), 1024,
+                              ImVec2(-1, ImGui::GetTextLineHeight() * 4),
+                              ImGuiInputTextFlags_AllowTabInput);
+
+    EndTable();
+  }
+
+  CLEAR_AND_RETURN_STATUS(status_)
+
+  return absl::OkStatus();
+}
+
+void PaletteEditor::DrawCustomPalette() {
+  if (BeginChild("ColorPalette", ImVec2(0, 40), true,
+                 ImGuiWindowFlags_HorizontalScrollbar)) {
+    for (int i = 0; i < custom_palette_.size(); i++) {
+      PushID(i);
+      SameLine(0.0f, GetStyle().ItemSpacing.y);
+      gui::SnesColorEdit4("##customPalette", &custom_palette_[i],
+                          ImGuiColorEditFlags_NoInputs);
+      // Accept a drag drop target which adds a color to the custom_palette_
+      if (BeginDragDropTarget()) {
+        if (const ImGuiPayload* payload =
+                AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F)) {
+          ImVec4 color = ImVec4(0, 0, 0, 1.0f);
+          memcpy((float*)&color, payload->Data, sizeof(float));
+          custom_palette_.push_back(SnesColor(color));
+        }
+        EndDragDropTarget();
+      }
+
+      PopID();
+    }
+    SameLine();
+    if (ImGui::Button("Add Color")) {
+      custom_palette_.push_back(SnesColor(0x7FFF));
+    }
+    SameLine();
+    if (ImGui::Button("Export to Clipboard")) {
+      std::string clipboard;
+      for (const auto& color : custom_palette_) {
+        clipboard += absl::StrFormat("$%04X,", color.snes());
+      }
+      SetClipboardText(clipboard.c_str());
+    }
+  }
+  EndChild();
+}
+
+void PaletteEditor::DisplayCategoryTable() {
+  if (BeginTable("Category Table", 8,
+                 ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable |
+                     ImGuiTableFlags_SizingStretchSame |
+                     ImGuiTableFlags_Hideable,
+                 ImVec2(0, 0))) {
+    TableSetupColumn("Weapons and Gear");
+    TableSetupColumn("Overworld and Area Colors");
+    TableSetupColumn("Global Sprites");
+    TableSetupColumn("Sprites Aux1");
+    TableSetupColumn("Sprites Aux2");
+    TableSetupColumn("Sprites Aux3");
+    TableSetupColumn("Maps and Items");
+    TableSetupColumn("Dungeons");
+    TableHeadersRow();
+    TableNextRow();
+
+    TableSetColumnIndex(0);
+    if (TreeNode("Sword")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kSword);
+      TreePop();
+    }
+    if (TreeNode("Shield")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kShield);
+      TreePop();
+    }
+    if (TreeNode("Clothes")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kClothes, true);
+      TreePop();
+    }
+
+    TableSetColumnIndex(1);
+    gui::BeginChildWithScrollbar("##WorldPaletteScrollRegion");
+    if (TreeNode("World Colors")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kWorldColors);
+      TreePop();
+    }
+    if (TreeNode("Area Colors")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kAreaColors);
+      TreePop();
+    }
+    EndChild();
+
+    TableSetColumnIndex(2);
+    status_ = DrawPaletteGroup(PaletteCategory::kGlobalSprites, true);
+
+    TableSetColumnIndex(3);
+    status_ = DrawPaletteGroup(PaletteCategory::kSpritesAux1);
+
+    TableSetColumnIndex(4);
+    status_ = DrawPaletteGroup(PaletteCategory::kSpritesAux2);
+
+    TableSetColumnIndex(5);
+    status_ = DrawPaletteGroup(PaletteCategory::kSpritesAux3);
+
+    TableSetColumnIndex(6);
+    gui::BeginChildWithScrollbar("##MapPaletteScrollRegion");
+    if (TreeNode("World Map")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kWorldMap, true);
+      TreePop();
+    }
+    if (TreeNode("Dungeon Map")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kDungeonMap);
+      TreePop();
+    }
+    if (TreeNode("Triforce")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kTriforce);
+      TreePop();
+    }
+    if (TreeNode("Crystal")) {
+      status_ = DrawPaletteGroup(PaletteCategory::kCrystal);
+      TreePop();
+    }
+    EndChild();
+
+    TableSetColumnIndex(7);
+    gui::BeginChildWithScrollbar("##DungeonPaletteScrollRegion");
+    status_ = DrawPaletteGroup(PaletteCategory::kDungeons, true);
+    EndChild();
+
+    EndTable();
+  }
+}
+
+absl::Status PaletteEditor::DrawPaletteGroup(int category, bool right_side) {
+  if (!rom()->is_loaded()) {
+    return absl::NotFoundError("ROM not open, no palettes to display");
+  }
+
+  auto palette_group_name = kPaletteGroupNames[category];
+  gfx::PaletteGroup* palette_group =
+      rom()->mutable_palette_group()->get_group(palette_group_name.data());
+  const auto size = palette_group->size();
+
+  static bool edit_color = false;
+  for (int j = 0; j < size; j++) {
+    gfx::SnesPalette* palette = palette_group->mutable_palette(j);
+    auto pal_size = palette->size();
+
+    for (int n = 0; n < pal_size; n++) {
+      PushID(n);
+      if (!right_side) {
+        if ((n % 7) != 0) SameLine(0.0f, GetStyle().ItemSpacing.y);
+      } else {
+        if ((n % 15) != 0) SameLine(0.0f, GetStyle().ItemSpacing.y);
+      }
+
+      auto popup_id =
+          absl::StrCat(kPaletteCategoryNames[category].data(), j, "_", n);
+
+      // Small icon of the color in the palette
+      if (gui::SnesColorButton(popup_id, *palette->mutable_color(n),
+                               kPalNoAlpha)) {
+        ASSIGN_OR_RETURN(current_color_, palette->GetColor(n));
+      }
+
+      if (BeginPopupContextItem(popup_id.c_str())) {
+        RETURN_IF_ERROR(HandleColorPopup(*palette, category, j, n))
+      }
+      PopID();
+    }
+    SameLine();
+    rom()->resource_label()->SelectableLabelWithNameEdit(
+        false, palette_group_name.data(), /*key=*/std::to_string(j),
+        "Unnamed Palette");
+    if (right_side) Separator();
+  }
+  return absl::OkStatus();
+}
+
+void PaletteEditor::DrawModifiedColors() {
+  if (BeginChild("ModifiedColors", ImVec2(0, 100), true,
+                 ImGuiWindowFlags_HorizontalScrollbar)) {
+    for (int i = 0; i < history_.size(); i++) {
+      PushID(i);
+      gui::SnesColorEdit4("Original ", &history_.GetOriginalColor(i),
+                          ImGuiColorEditFlags_NoInputs);
+      SameLine(0.0f, GetStyle().ItemSpacing.y);
+      gui::SnesColorEdit4("Modified ", &history_.GetModifiedColor(i),
+                          ImGuiColorEditFlags_NoInputs);
+      PopID();
+    }
+  }
+  EndChild();
+}
+
+absl::Status PaletteEditor::HandleColorPopup(gfx::SnesPalette& palette, int i,
+                                             int j, int n) {
+  auto col = gfx::ToFloatArray(palette[n]);
+  auto original_color = palette[n];
+  if (gui::SnesColorEdit4("Edit Color", &palette[n], kColorPopupFlags)) {
+    history_.RecordChange(/*group_name=*/std::string(kPaletteGroupNames[i]),
+                          /*palette_index=*/j, /*color_index=*/n,
+                          original_color, palette[n]);
+    palette[n].set_modified(true);
+  }
+
+  if (Button("Copy as..", ImVec2(-1, 0))) OpenPopup("Copy");
+  if (BeginPopup("Copy")) {
+    int cr = F32_TO_INT8_SAT(col[0]);
+    int cg = F32_TO_INT8_SAT(col[1]);
+    int cb = F32_TO_INT8_SAT(col[2]);
+    char buf[64];
+
+    CustomFormatString(buf, IM_ARRAYSIZE(buf), "(%.3ff, %.3ff, %.3ff)", col[0],
+                       col[1], col[2]);
+    if (Selectable(buf)) SetClipboardText(buf);
+
+    CustomFormatString(buf, IM_ARRAYSIZE(buf), "(%d,%d,%d)", cr, cg, cb);
+    if (Selectable(buf)) SetClipboardText(buf);
+
+    CustomFormatString(buf, IM_ARRAYSIZE(buf), "#%02X%02X%02X", cr, cg, cb);
+    if (Selectable(buf)) SetClipboardText(buf);
+
+    // SNES Format
+    CustomFormatString(buf, IM_ARRAYSIZE(buf), "$%04X",
+                       ConvertRGBtoSNES(ImVec4(col[0], col[1], col[2], 1.0f)));
+    if (Selectable(buf)) SetClipboardText(buf);
+
+    EndPopup();
+  }
+
+  EndPopup();
+  return absl::OkStatus();
+}
+
+void PaletteEditor::DisplayPalette(gfx::SnesPalette& palette, bool loaded) {
+  static ImVec4 color = ImVec4(0, 0, 0, 255.f);
+  ImGuiColorEditFlags misc_flags = ImGuiColorEditFlags_AlphaPreview |
+                                   ImGuiColorEditFlags_NoDragDrop |
+                                   ImGuiColorEditFlags_NoOptions;
+
+  // Generate a default palette. The palette will persist and can be edited.
+  static bool init = false;
+  if (loaded && !init) {
+    status_ = InitializeSavedPalette(palette);
+    init = true;
+  }
+
+  static ImVec4 backup_color;
+  bool open_popup = ColorButton("MyColor##3b", color, misc_flags);
+  SameLine(0, GetStyle().ItemInnerSpacing.x);
+  open_popup |= Button("Palette");
+  if (open_popup) {
+    OpenPopup("mypicker");
+    backup_color = color;
+  }
+
+  if (BeginPopup("mypicker")) {
+    TEXT_WITH_SEPARATOR("Current Overworld Palette");
+    ColorPicker4("##picker", (float*)&color,
+                 misc_flags | ImGuiColorEditFlags_NoSidePreview |
+                     ImGuiColorEditFlags_NoSmallPreview);
+    SameLine();
+
+    BeginGroup();  // Lock X position
+    Text("Current ==>");
+    SameLine();
+    Text("Previous");
+
+    if (Button("Update Map Palette")) {
+    }
+
+    ColorButton(
+        "##current", color,
+        ImGuiColorEditFlags_NoPicker | ImGuiColorEditFlags_AlphaPreviewHalf,
+        ImVec2(60, 40));
+    SameLine();
+
+    if (ColorButton(
+            "##previous", backup_color,
+            ImGuiColorEditFlags_NoPicker | ImGuiColorEditFlags_AlphaPreviewHalf,
+            ImVec2(60, 40)))
+      color = backup_color;
+
+    // List of Colors in Overworld Palette
+    Separator();
+    Text("Palette");
+    for (int n = 0; n < IM_ARRAYSIZE(saved_palette_); n++) {
+      PushID(n);
+      if ((n % 8) != 0) SameLine(0.0f, GetStyle().ItemSpacing.y);
+
+      if (ColorButton("##palette", saved_palette_[n], kPalButtonFlags2,
+                      ImVec2(20, 20)))
+        color = ImVec4(saved_palette_[n].x, saved_palette_[n].y,
+                       saved_palette_[n].z, color.w);  // Preserve alpha!
+
+      if (BeginDragDropTarget()) {
+        if (const ImGuiPayload* payload =
+                AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F))
+          memcpy((float*)&saved_palette_[n], payload->Data, sizeof(float) * 3);
+        if (const ImGuiPayload* payload =
+                AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F))
+          memcpy((float*)&saved_palette_[n], payload->Data, sizeof(float) * 4);
+        EndDragDropTarget();
+      }
+
+      PopID();
+    }
+    EndGroup();
+    EndPopup();
+  }
+}
+
+absl::Status PaletteEditor::EditColorInPalette(gfx::SnesPalette& palette,
+                                               int index) {
+  if (index >= palette.size()) {
+    return absl::InvalidArgumentError("Index out of bounds");
+  }
+
+  // Get the current color
+  ASSIGN_OR_RETURN(auto color, palette.GetColor(index));
+  auto currentColor = color.rgb();
+  if (ColorPicker4("Color Picker", (float*)&palette[index])) {
+    // The color was modified, update it in the palette
+    palette(index, currentColor);
+  }
+  return absl::OkStatus();
+}
+
+absl::Status PaletteEditor::ResetColorToOriginal(
+    gfx::SnesPalette& palette, int index,
+    const gfx::SnesPalette& originalPalette) {
+  if (index >= palette.size() || index >= originalPalette.size()) {
+    return absl::InvalidArgumentError("Index out of bounds");
+  }
+  ASSIGN_OR_RETURN(auto color, originalPalette.GetColor(index));
+  auto originalColor = color.rgb();
+  palette(index, originalColor);
+  return absl::OkStatus();
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/graphics/palette_editor.h

@@ -0,0 +1,140 @@
+#ifndef YAZE_APP_EDITOR_PALETTE_EDITOR_H
+#define YAZE_APP_EDITOR_PALETTE_EDITOR_H
+
+#include "imgui/imgui.h"
+
+#include "absl/status/status.h"
+#include "app/editor/graphics/gfx_group_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+namespace palette_internal {
+struct PaletteChange {
+  std::string group_name;
+  size_t palette_index;
+  size_t color_index;
+  gfx::SnesColor original_color;
+  gfx::SnesColor new_color;
+};
+
+class PaletteEditorHistory {
+ public:
+  // Record a change in the palette editor
+  void RecordChange(const std::string& groupName, size_t paletteIndex,
+                    size_t colorIndex, const gfx::SnesColor& originalColor,
+                    const gfx::SnesColor& newColor) {
+    // Check size and remove the oldest if necessary
+    if (recentChanges.size() >= maxHistorySize) {
+      recentChanges.pop_front();
+    }
+
+    // Push the new change
+    recentChanges.push_back(
+        {groupName, paletteIndex, colorIndex, originalColor, newColor});
+  }
+
+  // Get recent changes for display in the palette editor
+  const std::deque<PaletteChange>& GetRecentChanges() const {
+    return recentChanges;
+  }
+
+  // Restore the original color
+  gfx::SnesColor RestoreOriginalColor(const std::string& groupName,
+                                      size_t paletteIndex,
+                                      size_t colorIndex) const {
+    for (const auto& change : recentChanges) {
+      if (change.group_name == groupName &&
+          change.palette_index == paletteIndex &&
+          change.color_index == colorIndex) {
+        return change.original_color;
+      }
+    }
+    // Handle error or return default (this is just an example,
+    // handle as appropriate for your application)
+    return gfx::SnesColor();
+  }
+
+  auto size() const { return recentChanges.size(); }
+
+  gfx::SnesColor& GetModifiedColor(size_t index) {
+    return recentChanges[index].new_color;
+  }
+  gfx::SnesColor& GetOriginalColor(size_t index) {
+    return recentChanges[index].original_color;
+  }
+
+ private:
+  std::deque<PaletteChange> recentChanges;
+  static const size_t maxHistorySize = 50;  // or any other number you deem fit
+};
+}  // namespace palette_internal
+
+/**
+ * @class PaletteEditor
+ * @brief Allows the user to view and edit in game palettes.
+ */
+class PaletteEditor : public SharedRom, public Editor {
+ public:
+  PaletteEditor() {
+    type_ = EditorType::kPalette;
+    custom_palette_.push_back(gfx::SnesColor(0x7FFF));
+  }
+
+  absl::Status Update() override;
+
+  absl::Status Cut() override { return absl::OkStatus(); }
+  absl::Status Copy() override { return absl::OkStatus(); }
+  absl::Status Paste() override { return absl::OkStatus(); }
+  absl::Status Undo() override { return absl::OkStatus(); }
+  absl::Status Redo() override { return absl::OkStatus(); }
+  absl::Status Find() override { return absl::OkStatus(); }
+
+  void DisplayCategoryTable();
+
+  absl::Status EditColorInPalette(gfx::SnesPalette& palette, int index);
+  absl::Status ResetColorToOriginal(gfx::SnesPalette& palette, int index,
+                                    const gfx::SnesPalette& originalPalette);
+  void DisplayPalette(gfx::SnesPalette& palette, bool loaded);
+  absl::Status DrawPaletteGroup(int category, bool right_side = false);
+
+  void DrawCustomPalette();
+
+  void DrawModifiedColors();
+
+ private:
+  absl::Status HandleColorPopup(gfx::SnesPalette& palette, int i, int j, int n);
+  absl::Status InitializeSavedPalette(const gfx::SnesPalette& palette) {
+    for (int n = 0; n < palette.size(); n++) {
+      ASSIGN_OR_RETURN(auto color, palette.GetColor(n));
+      saved_palette_[n].x = color.rgb().x / 255;
+      saved_palette_[n].y = color.rgb().y / 255;
+      saved_palette_[n].z = color.rgb().z / 255;
+      saved_palette_[n].w = 255;  // Alpha
+    }
+    return absl::OkStatus();
+  }
+
+  absl::Status status_;
+  gfx::SnesColor current_color_;
+
+  GfxGroupEditor gfx_group_editor_;
+
+  std::vector<gfx::SnesColor> custom_palette_;
+
+  ImVec4 saved_palette_[256] = {};
+
+  palette_internal::PaletteEditorHistory history_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/editor/graphics/screen_editor.cc

@@ -0,0 +1,437 @@
+#include "screen_editor.h"
+
+#include "imgui/imgui.h"
+
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+#include "absl/status/statusor.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
+#include "app/core/common.h"
+#include "app/core/constants.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gfx/tilesheet.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/zelda3/dungeon/room.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+absl::Status ScreenEditor::Update() {
+  TAB_BAR("##TabBar")
+  TAB_ITEM("Dungeon Maps")
+  if (rom()->is_loaded()) {
+    DrawDungeonMapsEditor();
+  }
+  END_TAB_ITEM()
+  DrawInventoryMenuEditor();
+  DrawOverworldMapEditor();
+  DrawTitleScreenEditor();
+  DrawNamingScreenEditor();
+  END_TAB_BAR()
+
+  return absl::OkStatus();
+}
+
+void ScreenEditor::DrawInventoryMenuEditor() {
+  TAB_ITEM("Inventory Menu")
+
+  static bool create = false;
+  if (!create && rom()->is_loaded()) {
+    status_ = inventory_.Create();
+    palette_ = inventory_.Palette();
+    create = true;
+  }
+
+  DrawInventoryToolset();
+
+  if (ImGui::BeginTable("InventoryScreen", 3, ImGuiTableFlags_Resizable)) {
+    ImGui::TableSetupColumn("Canvas");
+    ImGui::TableSetupColumn("Tiles");
+    ImGui::TableSetupColumn("Palette");
+    ImGui::TableHeadersRow();
+
+    ImGui::TableNextColumn();
+    screen_canvas_.DrawBackground();
+    screen_canvas_.DrawContextMenu();
+    screen_canvas_.DrawBitmap(inventory_.Bitmap(), 2, create);
+    screen_canvas_.DrawGrid(32.0f);
+    screen_canvas_.DrawOverlay();
+
+    ImGui::TableNextColumn();
+    tilesheet_canvas_.DrawBackground(ImVec2(128 * 2 + 2, (192 * 2) + 4));
+    tilesheet_canvas_.DrawContextMenu();
+    tilesheet_canvas_.DrawBitmap(inventory_.Tilesheet(), 2, create);
+    tilesheet_canvas_.DrawGrid(16.0f);
+    tilesheet_canvas_.DrawOverlay();
+
+    ImGui::TableNextColumn();
+    status_ = gui::DisplayPalette(palette_, create);
+
+    ImGui::EndTable();
+  }
+  ImGui::Separator();
+  END_TAB_ITEM()
+}
+
+void ScreenEditor::DrawInventoryToolset() {
+  if (ImGui::BeginTable("InventoryToolset", 8, ImGuiTableFlags_SizingFixedFit,
+                        ImVec2(0, 0))) {
+    ImGui::TableSetupColumn("#drawTool");
+    ImGui::TableSetupColumn("#sep1");
+    ImGui::TableSetupColumn("#zoomOut");
+    ImGui::TableSetupColumn("#zoomIN");
+    ImGui::TableSetupColumn("#sep2");
+    ImGui::TableSetupColumn("#bg2Tool");
+    ImGui::TableSetupColumn("#bg3Tool");
+    ImGui::TableSetupColumn("#itemTool");
+
+    BUTTON_COLUMN(ICON_MD_UNDO)
+    BUTTON_COLUMN(ICON_MD_REDO)
+    TEXT_COLUMN(ICON_MD_MORE_VERT)
+    BUTTON_COLUMN(ICON_MD_ZOOM_OUT)
+    BUTTON_COLUMN(ICON_MD_ZOOM_IN)
+    TEXT_COLUMN(ICON_MD_MORE_VERT)
+    BUTTON_COLUMN(ICON_MD_DRAW)
+    BUTTON_COLUMN(ICON_MD_BUILD)
+
+    ImGui::EndTable();
+  }
+}
+
+absl::Status ScreenEditor::LoadDungeonMaps() {
+  std::vector<std::array<uint8_t, 25>> current_floor_rooms_d;
+  std::vector<std::array<uint8_t, 25>> current_floor_gfx_d;
+  int total_floors_d;
+  uint8_t nbr_floor_d;
+  uint8_t nbr_basement_d;
+
+  for (int d = 0; d < 14; d++) {
+    current_floor_rooms_d.clear();
+    current_floor_gfx_d.clear();
+    ASSIGN_OR_RETURN(
+        int ptr,
+        rom()->ReadWord(zelda3::screen::kDungeonMapRoomsPtr + (d * 2)));
+    ASSIGN_OR_RETURN(
+        int ptrGFX,
+        rom()->ReadWord(zelda3::screen::kDungeonMapRoomsPtr + (d * 2)));
+    ptr |= 0x0A0000;                  // Add bank to the short ptr
+    ptrGFX |= 0x0A0000;               // Add bank to the short ptr
+    int pcPtr = core::SnesToPc(ptr);  // Contains data for the next 25 rooms
+    int pcPtrGFX =
+        core::SnesToPc(ptrGFX);  // Contains data for the next 25 rooms
+
+    ASSIGN_OR_RETURN(
+        ushort bossRoomD,
+        rom()->ReadWord(zelda3::screen::kDungeonMapBossRooms + (d * 2)));
+
+    ASSIGN_OR_RETURN(
+        nbr_basement_d,
+        rom()->ReadByte(zelda3::screen::kDungeonMapFloors + (d * 2)));
+    nbr_basement_d &= 0x0F;
+
+    ASSIGN_OR_RETURN(
+        nbr_floor_d,
+        rom()->ReadByte(zelda3::screen::kDungeonMapFloors + (d * 2)));
+    nbr_floor_d &= 0xF0;
+    nbr_floor_d = nbr_floor_d >> 4;
+
+    total_floors_d = nbr_basement_d + nbr_floor_d;
+
+    dungeon_map_labels_.emplace_back();
+
+    // for each floor in the dungeon
+    for (int i = 0; i < total_floors_d; i++) {
+      dungeon_map_labels_[d].emplace_back();
+
+      std::array<uint8_t, 25> rdata;
+      std::array<uint8_t, 25> gdata;
+
+      // for each room on the floor
+      for (int j = 0; j < 25; j++) {
+        // rdata[j] = 0x0F;
+        gdata[j] = 0xFF;
+        rdata[j] = rom()->data()[pcPtr + j + (i * 25)];  // Set the rooms
+
+        if (rdata[j] == 0x0F) {
+          gdata[j] = 0xFF;
+        } else {
+          gdata[j] = rom()->data()[pcPtrGFX++];
+        }
+
+        std::string label = core::UppercaseHexByte(rdata[j]);
+        dungeon_map_labels_[d][i][j] = label;
+      }
+
+      current_floor_gfx_d.push_back(gdata);    // Add new floor gfx data
+      current_floor_rooms_d.push_back(rdata);  // Add new floor data
+    }
+
+    dungeon_maps_.emplace_back(bossRoomD, nbr_floor_d, nbr_basement_d,
+                               current_floor_rooms_d, current_floor_gfx_d);
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status ScreenEditor::SaveDungeonMaps() {
+  for (int d = 0; d < 14; d++) {
+    int ptr = zelda3::screen::kDungeonMapRoomsPtr + (d * 2);
+    int ptrGFX = zelda3::screen::kDungeonMapGfxPtr + (d * 2);
+    int pcPtr = core::SnesToPc(ptr);
+    int pcPtrGFX = core::SnesToPc(ptrGFX);
+
+    const int nbr_floors = dungeon_maps_[d].nbr_of_floor;
+    const int nbr_basements = dungeon_maps_[d].nbr_of_basement;
+    for (int i = 0; i < nbr_floors + nbr_basements; i++) {
+      for (int j = 0; j < 25; j++) {
+        // rom()->data()[pcPtr + j + (i * 25)] =
+        //     dungeon_maps_[d].floor_rooms[i][j];
+        // rom()->data()[pcPtrGFX++] = dungeon_maps_[d].floor_gfx[i][j];
+
+        RETURN_IF_ERROR(rom()->WriteByte(ptr + j + (i * 25),
+                                         dungeon_maps_[d].floor_rooms[i][j]));
+        RETURN_IF_ERROR(rom()->WriteByte(ptrGFX + j + (i * 25),
+                                         dungeon_maps_[d].floor_gfx[i][j]));
+        pcPtrGFX++;
+      }
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status ScreenEditor::LoadDungeonMapTile16() {
+  tile16_sheet_.Init(256, 192, gfx::TileType::Tile16);
+
+  for (int i = 0; i < 186; i++) {
+    int addr = zelda3::screen::kDungeonMapTile16;
+    if (rom()->data()[zelda3::screen::kDungeonMapExpCheck] != 0xB9) {
+      addr = zelda3::screen::kDungeonMapTile16Expanded;
+    }
+
+    ASSIGN_OR_RETURN(auto tl, rom()->ReadWord(addr + (i * 8)));
+    gfx::TileInfo t1 = gfx::WordToTileInfo(tl);  // Top left
+
+    ASSIGN_OR_RETURN(auto tr, rom()->ReadWord(addr + 2 + (i * 8)));
+    gfx::TileInfo t2 = gfx::WordToTileInfo(tr);  // Top right
+
+    ASSIGN_OR_RETURN(auto bl, rom()->ReadWord(addr + 4 + (i * 8)));
+    gfx::TileInfo t3 = gfx::WordToTileInfo(bl);  // Bottom left
+
+    ASSIGN_OR_RETURN(auto br, rom()->ReadWord(addr + 6 + (i * 8)));
+    gfx::TileInfo t4 = gfx::WordToTileInfo(br);  // Bottom right
+
+    tile16_sheet_.ComposeTile16(rom()->graphics_buffer(), t1, t2, t3, t4);
+  }
+
+  RETURN_IF_ERROR(tile16_sheet_.mutable_bitmap()->ApplyPalette(
+      *rom()->mutable_dungeon_palette(3)));
+  rom()->RenderBitmap(&*tile16_sheet_.mutable_bitmap().get());
+
+  for (int i = 0; i < tile16_sheet_.num_tiles(); ++i) {
+    if (tile16_individual_.count(i) == 0) {
+      auto tile = tile16_sheet_.GetTile16(i);
+      tile16_individual_[i] = tile;
+      rom()->RenderBitmap(&tile16_individual_[i]);
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+void ScreenEditor::DrawDungeonMapsTabs() {
+  auto current_dungeon = dungeon_maps_[selected_dungeon];
+  if (ImGui::BeginTabBar("##DungeonMapTabs")) {
+    auto nbr_floors =
+        current_dungeon.nbr_of_floor + current_dungeon.nbr_of_basement;
+    for (int i = 0; i < nbr_floors; i++) {
+      std::string tab_name = absl::StrFormat("Floor %d", i + 1);
+      if (i >= current_dungeon.nbr_of_floor) {
+        tab_name = absl::StrFormat("Basement %d",
+                                   i - current_dungeon.nbr_of_floor + 1);
+      }
+
+      if (ImGui::BeginTabItem(tab_name.c_str())) {
+        floor_number = i;
+        // screen_canvas_.LoadCustomLabels(dungeon_map_labels_[selected_dungeon]);
+        // screen_canvas_.set_current_labels(floor_number);
+        screen_canvas_.DrawBackground(ImVec2(325, 325));
+        screen_canvas_.DrawTileSelector(64.f);
+
+        auto boss_room = current_dungeon.boss_room;
+        for (int j = 0; j < 25; j++) {
+          if (current_dungeon.floor_rooms[floor_number][j] != 0x0F) {
+            int tile16_id = current_dungeon.floor_rooms[floor_number][j];
+            int tile_x = (tile16_id % 16) * 16;
+            int tile_y = (tile16_id / 16) * 16;
+            int posX = ((j % 5) * 32);
+            int posY = ((j / 5) * 32);
+
+            if (tile16_individual_.count(tile16_id) == 0) {
+              auto tile = tile16_sheet_.GetTile16(tile16_id);
+              std::cout << "Tile16: " << tile16_id << std::endl;
+              rom()->RenderBitmap(&tile);
+              tile16_individual_[tile16_id] = tile;
+            }
+            screen_canvas_.DrawBitmap(tile16_individual_[tile16_id], (posX * 2),
+                                      (posY * 2), 4.0f);
+
+            if (current_dungeon.floor_rooms[floor_number][j] == boss_room) {
+              screen_canvas_.DrawOutlineWithColor((posX * 2), (posY * 2), 64,
+                                                  64, core::kRedPen);
+            }
+
+            std::string label =
+                dungeon_map_labels_[selected_dungeon][floor_number][j];
+            screen_canvas_.DrawText(label, (posX * 2), (posY * 2));
+          }
+        }
+
+        screen_canvas_.DrawGrid(64.f, 5);
+        screen_canvas_.DrawOverlay();
+
+        if (!screen_canvas_.points().empty()) {
+          int x = screen_canvas_.points().front().x / 64;
+          int y = screen_canvas_.points().front().y / 64;
+          selected_room = x + (y * 5);
+        }
+        ImGui::EndTabItem();
+      }
+    }
+    ImGui::EndTabBar();
+  }
+
+  gui::InputHexByte(
+      "Selected Room",
+      &current_dungeon.floor_rooms[floor_number].at(selected_room));
+
+  gui::InputHexWord("Boss Room", &current_dungeon.boss_room);
+
+  if (ImGui::Button("Copy Floor", ImVec2(100, 0))) {
+    copy_button_pressed = true;
+  }
+  ImGui::SameLine();
+  if (ImGui::Button("Paste Floor", ImVec2(100, 0))) {
+    paste_button_pressed = true;
+  }
+}
+
+void ScreenEditor::DrawDungeonMapsEditor() {
+  if (!dungeon_maps_loaded_) {
+    if (LoadDungeonMaps().ok()) {
+      if (LoadDungeonMapTile16().ok()) {
+        auto bitmap_manager = rom()->mutable_bitmap_manager();
+        sheets_.emplace(0, *bitmap_manager->mutable_bitmap(212));
+        sheets_.emplace(1, *bitmap_manager->mutable_bitmap(213));
+        sheets_.emplace(2, *bitmap_manager->mutable_bitmap(214));
+        sheets_.emplace(3, *bitmap_manager->mutable_bitmap(215));
+        dungeon_maps_loaded_ = true;
+      } else {
+        ImGui::Text("Failed to load dungeon map tile16");
+      }
+    } else {
+      ImGui::Text("Failed to load dungeon maps");
+    }
+  }
+
+  static std::vector<std::string> dungeon_names = {
+      "Sewers/Sanctuary",   "Hyrule Castle", "Eastern Palace",
+      "Desert Palace",      "Tower of Hera", "Agahnim's Tower",
+      "Palace of Darkness", "Swamp Palace",  "Skull Woods",
+      "Thieves' Town",      "Ice Palace",    "Misery Mire",
+      "Turtle Rock",        "Ganon's Tower"};
+
+  if (ImGui::BeginTable("DungeonMapsTable", 4, ImGuiTableFlags_Resizable)) {
+    ImGui::TableSetupColumn("Dungeon");
+    ImGui::TableSetupColumn("Map");
+    ImGui::TableSetupColumn("Rooms Gfx");
+    ImGui::TableSetupColumn("Tiles Gfx");
+    ImGui::TableHeadersRow();
+
+    // Dungeon column
+    ImGui::TableNextColumn();
+    for (int i = 0; i < dungeon_names.size(); i++) {
+      rom()->resource_label()->SelectableLabelWithNameEdit(
+          selected_dungeon == i, "Dungeon Names", absl::StrFormat("%d", i),
+          dungeon_names[i]);
+      if (ImGui::IsItemClicked()) {
+        selected_dungeon = i;
+      }
+    }
+
+    // Map column
+    ImGui::TableNextColumn();
+    DrawDungeonMapsTabs();
+
+    ImGui::TableNextColumn();
+    if (ImGui::BeginChild("##DungeonMapTiles", ImVec2(0, 0), true)) {
+      tilesheet_canvas_.DrawBackground(ImVec2((256 * 2) + 2, (192 * 2) + 4));
+      tilesheet_canvas_.DrawContextMenu();
+      tilesheet_canvas_.DrawTileSelector(32.f);
+      tilesheet_canvas_.DrawBitmap(*tile16_sheet_.bitmap(), 2, true);
+      tilesheet_canvas_.DrawGrid(32.f);
+      tilesheet_canvas_.DrawOverlay();
+
+      if (!tilesheet_canvas_.points().empty()) {
+        selected_tile16_ = tilesheet_canvas_.points().front().x / 32 +
+                           (tilesheet_canvas_.points().front().y / 32) * 16;
+      }
+    }
+    ImGui::EndChild();
+
+    ImGui::TableNextColumn();
+    tilemap_canvas_.DrawBackground(ImVec2(128 * 2 + 2, (192 * 2) + 4));
+    tilemap_canvas_.DrawContextMenu();
+    tilemap_canvas_.DrawBitmapTable(sheets_);
+    tilemap_canvas_.DrawGrid();
+    tilemap_canvas_.DrawOverlay();
+
+    ImGui::EndTable();
+  }
+}
+
+void ScreenEditor::DrawTitleScreenEditor() {
+  TAB_ITEM("Title Screen")
+  END_TAB_ITEM()
+}
+void ScreenEditor::DrawNamingScreenEditor() {
+  TAB_ITEM("Naming Screen")
+  END_TAB_ITEM()
+}
+void ScreenEditor::DrawOverworldMapEditor() {
+  TAB_ITEM("Overworld Map")
+  END_TAB_ITEM()
+}
+
+void ScreenEditor::DrawToolset() {
+  static bool show_bg1 = true;
+  static bool show_bg2 = true;
+  static bool show_bg3 = true;
+
+  static bool drawing_bg1 = true;
+  static bool drawing_bg2 = false;
+  static bool drawing_bg3 = false;
+
+  ImGui::Checkbox("Show BG1", &show_bg1);
+  ImGui::SameLine();
+  ImGui::Checkbox("Show BG2", &show_bg2);
+
+  ImGui::Checkbox("Draw BG1", &drawing_bg1);
+  ImGui::SameLine();
+  ImGui::Checkbox("Draw BG2", &drawing_bg2);
+  ImGui::SameLine();
+  ImGui::Checkbox("Draw BG3", &drawing_bg3);
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/graphics/screen_editor.h

@@ -0,0 +1,106 @@
+#ifndef YAZE_APP_EDITOR_SCREEN_EDITOR_H
+#define YAZE_APP_EDITOR_SCREEN_EDITOR_H
+
+#include "imgui/imgui.h"
+
+#include <array>
+
+#include "absl/status/status.h"
+#include "app/core/constants.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gfx/tilesheet.h"
+#include "app/gui/canvas.h"
+#include "app/gui/color.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+#include "app/zelda3/screen/dungeon_map.h"
+#include "app/zelda3/screen/inventory.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+/**
+ * @brief The ScreenEditor class allows the user to edit a variety of screens in
+ * the game or create a custom menu.
+ *
+ * This class is currently a work in progress (WIP) and provides functionality
+ * for updating the screens, saving dungeon maps, drawing different types of
+ * screens, loading dungeon maps, and managing various properties related to the
+ * editor.
+ *
+ * The screens that can be edited include the title screen, naming screen,
+ * overworld map, inventory menu, and more.
+ *
+ * The class inherits from the SharedRom class.
+ */
+class ScreenEditor : public SharedRom, public Editor {
+ public:
+  ScreenEditor() {
+    screen_canvas_.SetCanvasSize(ImVec2(512, 512));
+    type_ = EditorType::kScreen;
+  }
+
+  absl::Status Update() override;
+
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+  absl::Status SaveDungeonMaps();
+
+ private:
+  void DrawTitleScreenEditor();
+  void DrawNamingScreenEditor();
+  void DrawOverworldMapEditor();
+
+  void DrawInventoryMenuEditor();
+  void DrawToolset();
+  void DrawInventoryToolset();
+
+  absl::Status LoadDungeonMaps();
+  absl::Status LoadDungeonMapTile16();
+  void DrawDungeonMapsTabs();
+  void DrawDungeonMapsEditor();
+
+  std::vector<zelda3::screen::DungeonMap> dungeon_maps_;
+  std::vector<std::vector<std::array<std::string, 25>>> dungeon_map_labels_;
+
+  std::unordered_map<int, gfx::Bitmap> tile16_individual_;
+
+  bool dungeon_maps_loaded_ = false;
+
+  int selected_tile16_ = 0;
+  int selected_dungeon = 0;
+  uint8_t selected_room = 0;
+  uint8_t boss_room = 0;
+  int floor_number = 1;
+
+  bool copy_button_pressed = false;
+  bool paste_button_pressed = false;
+
+  Bytes all_gfx_;
+  zelda3::screen::Inventory inventory_;
+  gfx::SnesPalette palette_;
+  gui::Canvas screen_canvas_;
+  gui::Canvas tilesheet_canvas_;
+  gui::Canvas tilemap_canvas_;
+
+  gfx::BitmapTable sheets_;
+
+  gfx::Tilesheet tile16_sheet_;
+
+  absl::Status status_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/editor/graphics/tile16_editor.cc

@@ -0,0 +1,400 @@
+#include "tile16_editor.h"
+
+#include "ImGuiFileDialog/ImGuiFileDialog.h"
+#include "imgui/imgui.h"
+
+#include <cmath>
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gfx/tilesheet.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/gui/style.h"
+#include "app/rom.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginChild;
+using ImGui::BeginMenu;
+using ImGui::BeginMenuBar;
+using ImGui::BeginTabBar;
+using ImGui::BeginTabItem;
+using ImGui::BeginTable;
+using ImGui::Button;
+using ImGui::Checkbox;
+using ImGui::Combo;
+using ImGui::EndChild;
+using ImGui::EndMenu;
+using ImGui::EndMenuBar;
+using ImGui::EndTabBar;
+using ImGui::EndTabItem;
+using ImGui::EndTable;
+using ImGui::GetContentRegionAvail;
+using ImGui::Separator;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+
+absl::Status Tile16Editor::InitBlockset(
+    gfx::Bitmap* tile16_blockset_bmp, gfx::Bitmap current_gfx_bmp,
+    const std::vector<gfx::Bitmap>& tile16_individual,
+    uint8_t all_tiles_types[0x200]) {
+  all_tiles_types_ = all_tiles_types;
+  tile16_blockset_bmp_ = tile16_blockset_bmp;
+  tile16_individual_ = tile16_individual;
+  current_gfx_bmp_ = current_gfx_bmp;
+  tile8_gfx_data_ = current_gfx_bmp_.vector();
+  RETURN_IF_ERROR(LoadTile8());
+  ImVector<std::string> tile16_names;
+  for (int i = 0; i < 0x200; ++i) {
+    std::string str = core::UppercaseHexByte(all_tiles_types_[i]);
+    tile16_names.push_back(str);
+  }
+
+  *tile8_source_canvas_.mutable_labels(0) = tile16_names;
+  *tile8_source_canvas_.custom_labels_enabled() = true;
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::Update() {
+  if (!map_blockset_loaded_) {
+    return absl::InvalidArgumentError("Blockset not initialized, open a ROM.");
+  }
+
+  RETURN_IF_ERROR(DrawMenu());
+  if (BeginTabBar("Tile16 Editor Tabs")) {
+    RETURN_IF_ERROR(DrawTile16Editor());
+    RETURN_IF_ERROR(UpdateTile16Transfer());
+    EndTabBar();
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::DrawMenu() {
+  if (BeginMenuBar()) {
+    if (BeginMenu("View")) {
+      Checkbox("Show Collision Types",
+               tile8_source_canvas_.custom_labels_enabled());
+      EndMenu();
+    }
+
+    EndMenuBar();
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::DrawTile16Editor() {
+  if (BeginTabItem("Tile16 Editing")) {
+    if (BeginTable("#Tile16EditorTable", 2, TABLE_BORDERS_RESIZABLE,
+                   ImVec2(0, 0))) {
+      TableSetupColumn("Blockset", ImGuiTableColumnFlags_WidthFixed,
+                       GetContentRegionAvail().x);
+      TableSetupColumn("Properties", ImGuiTableColumnFlags_WidthStretch,
+                       GetContentRegionAvail().x);
+      TableHeadersRow();
+      TableNextRow();
+      TableNextColumn();
+      RETURN_IF_ERROR(UpdateBlockset());
+
+      TableNextColumn();
+      RETURN_IF_ERROR(UpdateTile16Edit());
+      RETURN_IF_ERROR(DrawTileEditControls());
+
+      EndTable();
+    }
+
+    EndTabItem();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::UpdateBlockset() {
+  gui::BeginPadding(2);
+  gui::BeginChildWithScrollbar("##Tile16EditorBlocksetScrollRegion");
+  blockset_canvas_.DrawBackground();
+  gui::EndPadding();
+  {
+    blockset_canvas_.DrawContextMenu();
+    blockset_canvas_.DrawTileSelector(32);
+    blockset_canvas_.DrawBitmap(*tile16_blockset_bmp_, 0, map_blockset_loaded_);
+    blockset_canvas_.DrawGrid();
+    blockset_canvas_.DrawOverlay();
+    EndChild();
+  }
+
+  if (!blockset_canvas_.points().empty()) {
+    notify_tile16.mutable_get() = blockset_canvas_.GetTileIdFromMousePos();
+    notify_tile16.apply_changes();
+
+    if (notify_tile16.modified()) {
+      current_tile16_ = notify_tile16.get();
+      current_tile16_bmp_ = &tile16_individual_[notify_tile16];
+      auto ow_main_pal_group = rom()->palette_group().overworld_main;
+      RETURN_IF_ERROR(current_tile16_bmp_->ApplyPalette(
+          ow_main_pal_group[current_palette_]));
+      rom()->RenderBitmap(current_tile16_bmp_);
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::DrawToCurrentTile16(ImVec2 click_position) {
+  constexpr int tile8_size = 8;
+  constexpr int tile16_size = 16;
+
+  // Calculate the tile index for x and y based on the click_position
+  // Adjusting for Tile16 (16x16) which contains 4 Tile8 (8x8)
+  int tile_index_x = static_cast<int>(click_position.x) / tile8_size;
+  int tile_index_y = static_cast<int>(click_position.y) / tile8_size;
+  std::cout << "Tile Index X: " << tile_index_x << std::endl;
+  std::cout << "Tile Index Y: " << tile_index_y << std::endl;
+
+  // Calculate the pixel start position within the Tile16
+  ImVec2 start_position;
+  start_position.x = ((tile_index_x) / 4) * 0x40;
+  start_position.y = ((tile_index_y) / 4) * 0x40;
+  std::cout << "Start Position X: " << start_position.x << std::endl;
+  std::cout << "Start Position Y: " << start_position.y << std::endl;
+
+  // Draw the Tile8 to the correct position within the Tile16
+  for (int y = 0; y < tile8_size; ++y) {
+    for (int x = 0; x < tile8_size; ++x) {
+      int pixel_index =
+          (start_position.y + y) * tile16_size + ((start_position.x) + x);
+      int gfx_pixel_index = y * tile8_size + x;
+      current_tile16_bmp_->WriteToPixel(
+          pixel_index,
+          current_gfx_individual_[current_tile8_].data()[gfx_pixel_index]);
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::UpdateTile16Edit() {
+  auto ow_main_pal_group = rom()->palette_group().overworld_main;
+
+  if (BeginChild("Tile8 Selector", ImVec2(GetContentRegionAvail().x, 0x175),
+                 true)) {
+    tile8_source_canvas_.DrawBackground();
+    tile8_source_canvas_.DrawContextMenu(&current_gfx_bmp_);
+    if (tile8_source_canvas_.DrawTileSelector(32)) {
+      RETURN_IF_ERROR(
+          current_gfx_individual_[current_tile8_].ApplyPaletteWithTransparent(
+              ow_main_pal_group[0], current_palette_));
+      rom()->UpdateBitmap(&current_gfx_individual_[current_tile8_]);
+    }
+    tile8_source_canvas_.DrawBitmap(current_gfx_bmp_, 0, 0, 4.0f);
+    tile8_source_canvas_.DrawGrid();
+    tile8_source_canvas_.DrawOverlay();
+  }
+  EndChild();
+
+  // The user selected a tile8
+  if (!tile8_source_canvas_.points().empty()) {
+    uint16_t x = tile8_source_canvas_.points().front().x / 16;
+    uint16_t y = tile8_source_canvas_.points().front().y / 16;
+
+    current_tile8_ = x + (y * 8);
+    RETURN_IF_ERROR(
+        current_gfx_individual_[current_tile8_].ApplyPaletteWithTransparent(
+            ow_main_pal_group[0], current_palette_));
+    rom()->UpdateBitmap(&current_gfx_individual_[current_tile8_]);
+  }
+
+  if (BeginChild("Tile16 Editor Options",
+                 ImVec2(GetContentRegionAvail().x, 0x50), true)) {
+    tile16_edit_canvas_.DrawBackground();
+    tile16_edit_canvas_.DrawContextMenu(current_tile16_bmp_);
+    tile16_edit_canvas_.DrawBitmap(*current_tile16_bmp_, 0, 0, 4.0f);
+    if (!tile8_source_canvas_.points().empty()) {
+      if (tile16_edit_canvas_.DrawTilePainter(
+              current_gfx_individual_[current_tile8_], 16, 2.0f)) {
+        RETURN_IF_ERROR(
+            DrawToCurrentTile16(tile16_edit_canvas_.drawn_tile_position()));
+        rom()->UpdateBitmap(current_tile16_bmp_);
+      }
+    }
+    tile16_edit_canvas_.DrawGrid();
+    tile16_edit_canvas_.DrawOverlay();
+  }
+  EndChild();
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::DrawTileEditControls() {
+  Separator();
+  Text("Tile16 ID: %d", current_tile16_);
+  Text("Tile8 ID: %d", current_tile8_);
+  Text("Options:");
+  gui::InputHexByte("Palette", &notify_palette.mutable_get());
+  notify_palette.apply_changes();
+  if (notify_palette.modified()) {
+    auto palette = palettesets_[current_palette_].main;
+    auto value = notify_palette.get();
+    if (notify_palette.get() > 0x04 && notify_palette.get() < 0x06) {
+      palette = palettesets_[current_palette_].aux1;
+      value -= 0x04;
+    } else if (notify_palette.get() > 0x06) {
+      palette = palettesets_[current_palette_].aux2;
+      value -= 0x06;
+    }
+
+    if (value > 0x00) {
+      RETURN_IF_ERROR(
+          current_gfx_bmp_.ApplyPaletteWithTransparent(palette, value));
+      RETURN_IF_ERROR(
+          current_tile16_bmp_->ApplyPaletteWithTransparent(palette, value));
+      rom()->UpdateBitmap(&current_gfx_bmp_);
+      rom()->UpdateBitmap(current_tile16_bmp_);
+    }
+  }
+
+  Checkbox("X Flip", &x_flip);
+  Checkbox("Y Flip", &y_flip);
+  Checkbox("Priority Tile", &priority_tile);
+
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::LoadTile8() {
+  auto ow_main_pal_group = rom()->palette_group().overworld_main;
+
+  current_gfx_individual_.reserve(1024);
+
+  for (int index = 0; index < 1024; index++) {
+    std::vector<uint8_t> tile_data(0x40, 0x00);
+
+    // Copy the pixel data for the current tile into the vector
+    for (int ty = 0; ty < 8; ty++) {
+      for (int tx = 0; tx < 8; tx++) {
+        // Current Gfx Data is 16 sheets of 8x8 tiles ordered 16 wide by 4 tall
+
+        // Calculate the position in the tile data vector
+        int position = tx + (ty * 0x08);
+
+        // Calculate the position in the current gfx data
+        int num_columns = current_gfx_bmp_.width() / 8;
+        int num_rows = current_gfx_bmp_.height() / 8;
+        int x = (index % num_columns) * 8 + tx;
+        int y = (index / num_columns) * 8 + ty;
+        int gfx_position = x + (y * 0x100);
+
+        // Get the pixel value from the current gfx data
+        uint8_t value = current_gfx_bmp_.data()[gfx_position];
+
+        if (value & 0x80) {
+          value -= 0x88;
+        }
+
+        tile_data[position] = value;
+      }
+    }
+
+    current_gfx_individual_.emplace_back();
+    current_gfx_individual_[index].Create(0x08, 0x08, 0x08, tile_data);
+    RETURN_IF_ERROR(current_gfx_individual_[index].ApplyPaletteWithTransparent(
+        ow_main_pal_group[0], current_palette_));
+    rom()->RenderBitmap(&current_gfx_individual_[index]);
+  }
+
+  map_blockset_loaded_ = true;
+
+  return absl::OkStatus();
+}
+
+// ============================================================================
+// Tile16 Transfer
+
+absl::Status Tile16Editor::UpdateTile16Transfer() {
+  if (BeginTabItem("Tile16 Transfer")) {
+    if (BeginTable("#Tile16TransferTable", 2, TABLE_BORDERS_RESIZABLE,
+                   ImVec2(0, 0))) {
+      TableSetupColumn("Current ROM Tiles", ImGuiTableColumnFlags_WidthFixed,
+                       GetContentRegionAvail().x / 2);
+      TableSetupColumn("Transfer ROM Tiles", ImGuiTableColumnFlags_WidthFixed,
+                       GetContentRegionAvail().x / 2);
+      TableHeadersRow();
+      TableNextRow();
+
+      TableNextColumn();
+      RETURN_IF_ERROR(UpdateBlockset());
+
+      TableNextColumn();
+      RETURN_IF_ERROR(UpdateTransferTileCanvas());
+
+      EndTable();
+    }
+
+    EndTabItem();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::UpdateTransferTileCanvas() {
+  // Create a button for loading another ROM
+  if (Button("Load ROM")) {
+    ImGuiFileDialog::Instance()->OpenDialog(
+        "ChooseTransferFileDlgKey", "Open Transfer ROM", ".sfc,.smc", ".");
+  }
+  gui::FileDialogPipeline(
+      "ChooseTransferFileDlgKey", ".sfc,.smc", std::nullopt, [&]() {
+        std::string filePathName =
+            ImGuiFileDialog::Instance()->GetFilePathName();
+        transfer_status_ = transfer_rom_.LoadFromFile(filePathName);
+        transfer_started_ = true;
+      });
+
+  // TODO: Implement tile16 transfer
+  if (transfer_started_ && !transfer_blockset_loaded_) {
+    PRINT_IF_ERROR(transfer_rom_.LoadAllGraphicsData())
+    graphics_bin_ = transfer_rom_.graphics_bin();
+
+    // Load the Link to the Past overworld.
+    PRINT_IF_ERROR(transfer_overworld_.Load(transfer_rom_))
+    transfer_overworld_.set_current_map(0);
+    palette_ = transfer_overworld_.AreaPalette();
+
+    // Create the tile16 blockset image
+    RETURN_IF_ERROR(rom()->CreateAndRenderBitmap(
+        0x80, 0x2000, 0x80, transfer_overworld_.Tile16Blockset(),
+        transfer_blockset_bmp_, palette_));
+    transfer_blockset_loaded_ = true;
+  }
+
+  // Create a canvas for holding the tiles which will be exported
+  gui::BitmapCanvasPipeline(transfer_canvas_, transfer_blockset_bmp_, 0x100,
+                            (8192 * 2), 0x20, transfer_blockset_loaded_, true,
+                            3);
+
+  return absl::OkStatus();
+}
+
+absl::Status Tile16Editor::SetCurrentTile(int id) {
+  current_tile16_ = id;
+  current_tile16_bmp_ = &tile16_individual_[id];
+  auto ow_main_pal_group = rom()->palette_group().overworld_main;
+  RETURN_IF_ERROR(
+      current_tile16_bmp_->ApplyPalette(ow_main_pal_group[current_palette_]));
+  rom()->RenderBitmap(current_tile16_bmp_);
+  return absl::OkStatus();
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/graphics/tile16_editor.h

@@ -0,0 +1,118 @@
+#ifndef YAZE_APP_EDITOR_TILE16EDITOR_H
+#define YAZE_APP_EDITOR_TILE16EDITOR_H
+
+#include "imgui/imgui.h"
+
+#include <cmath>
+
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/editor/utils/gfx_context.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gfx/tilesheet.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+/**
+ * @brief Popup window to edit Tile16 data
+ */
+class Tile16Editor : public context::GfxContext, public SharedRom {
+ public:
+  absl::Status InitBlockset(gfx::Bitmap* tile16_blockset_bmp,
+                            gfx::Bitmap current_gfx_bmp,
+                            const std::vector<gfx::Bitmap>& tile16_individual,
+                            uint8_t all_tiles_types[0x200]);
+
+  absl::Status Update();
+  absl::Status DrawMenu();
+
+  absl::Status DrawTile16Editor();
+  absl::Status UpdateTile16Transfer();
+  absl::Status UpdateBlockset();
+
+  absl::Status DrawToCurrentTile16(ImVec2 pos);
+
+  absl::Status UpdateTile16Edit();
+
+  absl::Status DrawTileEditControls();
+
+  absl::Status UpdateTransferTileCanvas();
+
+  absl::Status LoadTile8();
+
+  absl::Status SetCurrentTile(int id);
+
+ private:
+  bool map_blockset_loaded_ = false;
+  bool transfer_started_ = false;
+  bool transfer_blockset_loaded_ = false;
+
+  int current_tile16_ = 0;
+  int current_tile8_ = 0;
+  uint8_t current_palette_ = 0;
+
+  core::NotifyValue<uint32_t> notify_tile16;
+  core::NotifyValue<uint8_t> notify_palette;
+
+  // Various options for the Tile16 Editor
+  bool x_flip;
+  bool y_flip;
+  bool priority_tile;
+  int tile_size;
+
+  uint8_t* all_tiles_types_;
+
+  // Tile16 blockset for selecting the tile to edit
+  gui::Canvas blockset_canvas_{"blocksetCanvas", ImVec2(0x100, 0x4000),
+                               gui::CanvasGridSize::k32x32};
+  gfx::Bitmap* tile16_blockset_bmp_;
+
+  // Canvas for editing the selected tile
+  gui::Canvas tile16_edit_canvas_{"Tile16EditCanvas", ImVec2(0x40, 0x40),
+                                  gui::CanvasGridSize::k64x64};
+  gfx::Bitmap* current_tile16_bmp_;
+
+  // Tile8 canvas to get the tile to drawing in the tile16_edit_canvas_
+  gui::Canvas tile8_source_canvas_{
+      "Tile8SourceCanvas",
+      ImVec2(core::kTilesheetWidth * 4, core::kTilesheetHeight * 0x10 * 4),
+      gui::CanvasGridSize::k32x32};
+  gfx::Bitmap current_gfx_bmp_;
+
+  gui::Canvas transfer_canvas_;
+  gfx::Bitmap transfer_blockset_bmp_;
+
+  std::vector<Bytes> tile16_individual_data_;
+  std::vector<gfx::Bitmap> tile16_individual_;
+
+  std::vector<gfx::Bitmap> current_gfx_individual_;
+
+  std::vector<uint8_t> current_tile16_data_;
+
+  std::vector<uint8_t> tile8_gfx_data_;
+
+  PaletteEditor palette_editor_;
+
+  gfx::SnesPalette palette_;
+  zelda3::overworld::Overworld transfer_overworld_;
+
+  gfx::BitmapTable graphics_bin_;
+
+  Rom transfer_rom_;
+  absl::Status transfer_status_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+#endif  // YAZE_APP_EDITOR_TILE16EDITOR_H

src/app/editor/master_editor.cc

@@ -0,0 +1,842 @@
+#include "master_editor.h"
+
+#include "ImGuiColorTextEdit/TextEditor.h"
+#include "ImGuiFileDialog/ImGuiFileDialog.h"
+#include "abseil-cpp/absl/strings/match.h"
+#include "imgui/backends/imgui_impl_sdl2.h"
+#include "imgui/backends/imgui_impl_sdlrenderer2.h"
+#include "imgui/imgui.h"
+#include "imgui/misc/cpp/imgui_stdlib.h"
+#include "imgui_internal.h"
+#include "imgui_memory_editor.h"
+
+#include "absl/status/status.h"
+#include "app/core/common.h"
+#include "app/core/constants.h"
+#include "app/core/platform/file_dialog.h"
+#include "app/editor/code/assembly_editor.h"
+#include "app/editor/dungeon/dungeon_editor.h"
+#include "app/editor/graphics/graphics_editor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/graphics/screen_editor.h"
+#include "app/editor/music/music_editor.h"
+#include "app/editor/overworld_editor.h"
+#include "app/editor/sprite/sprite_editor.h"
+#include "app/editor/utils/flags.h"
+#include "app/editor/utils/recent_files.h"
+#include "app/emu/emulator.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/gui/style.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using namespace ImGui;
+
+namespace {
+  
+bool BeginCentered(const char *name) {
+  ImGuiIO const &io = GetIO();
+  ImVec2 pos(io.DisplaySize.x * 0.5f, io.DisplaySize.y * 0.5f);
+  SetNextWindowPos(pos, ImGuiCond_Always, ImVec2(0.5f, 0.5f));
+  ImGuiWindowFlags flags =
+      ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoDecoration |
+      ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoSavedSettings;
+  return Begin(name, nullptr, flags);
+}
+
+bool IsEditorActive(Editor* editor, std::vector<Editor*>& active_editors) {
+  return std::find(active_editors.begin(), active_editors.end(), editor) !=
+         active_editors.end();
+}
+
+}  // namespace
+
+void MasterEditor::SetupScreen(std::shared_ptr<SDL_Renderer> renderer,
+                               std::string filename) {
+  sdl_renderer_ = renderer;
+  rom()->SetupRenderer(renderer);
+  if (!filename.empty()) {
+    PRINT_IF_ERROR(rom()->LoadFromFile(filename));
+  }
+  overworld_editor_.InitializeZeml();
+}
+
+absl::Status MasterEditor::Update() {
+  ManageKeyboardShortcuts();
+
+  DrawYazeMenu();
+  DrawFileDialog();
+  DrawStatusPopup();
+  DrawAboutPopup();
+  DrawInfoPopup();
+
+  if (rom()->is_loaded() && !rom_assets_loaded_) {
+    // Load all of the graphics data from the game.
+    RETURN_IF_ERROR(rom()->LoadAllGraphicsData())
+    // Initialize overworld graphics, maps, and palettes
+    RETURN_IF_ERROR(overworld_editor_.LoadGraphics());
+    rom_assets_loaded_ = true;
+  }
+
+  ManageActiveEditors();
+
+  return absl::OkStatus();
+}
+
+void MasterEditor::ManageActiveEditors() {
+  // Show popup pane to select an editor to add
+  static bool show_add_editor = false;
+  if (show_add_editor) OpenPopup("AddEditor");
+
+  if (BeginPopup("AddEditor", ImGuiWindowFlags_AlwaysAutoResize)) {
+    if (MenuItem("Overworld", nullptr, false,
+                 !IsEditorActive(&overworld_editor_, active_editors_))) {
+      active_editors_.push_back(&overworld_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Dungeon", nullptr, false,
+                 !IsEditorActive(&dungeon_editor_, active_editors_))) {
+      active_editors_.push_back(&dungeon_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Graphics", nullptr, false,
+                 !IsEditorActive(&graphics_editor_, active_editors_))) {
+      active_editors_.push_back(&graphics_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Music", nullptr, false,
+                 !IsEditorActive(&music_editor_, active_editors_))) {
+      active_editors_.push_back(&music_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Palette", nullptr, false,
+                 !IsEditorActive(&palette_editor_, active_editors_))) {
+      active_editors_.push_back(&palette_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Screen", nullptr, false,
+                 !IsEditorActive(&screen_editor_, active_editors_))) {
+      active_editors_.push_back(&screen_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Sprite", nullptr, false,
+                 !IsEditorActive(&sprite_editor_, active_editors_))) {
+      active_editors_.push_back(&sprite_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Code", nullptr, false,
+                 !IsEditorActive(&assembly_editor_, active_editors_))) {
+      active_editors_.push_back(&assembly_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Message", nullptr, false,
+                 !IsEditorActive(&message_editor_, active_editors_))) {
+      active_editors_.push_back(&message_editor_);
+      CloseCurrentPopup();
+    }
+    if (MenuItem("Settings", nullptr, false,
+                 !IsEditorActive(&settings_editor_, active_editors_))) {
+      active_editors_.push_back(&settings_editor_);
+      CloseCurrentPopup();
+    }
+    EndPopup();
+  }
+
+  if (!IsPopupOpen("AddEditor")) {
+    show_add_editor = false;
+  }
+
+  if (BeginTabBar("##TabBar", ImGuiTabBarFlags_Reorderable |
+                                  ImGuiTabBarFlags_AutoSelectNewTabs)) {
+    for (auto editor : active_editors_) {
+      bool open = true;
+      switch (editor->type()) {
+        case EditorType::kOverworld:
+          if (overworld_editor_.jump_to_tab() == -1) {
+            if (BeginTabItem("Overworld", &open)) {
+              current_editor_ = &overworld_editor_;
+              status_ = overworld_editor_.Update();
+              EndTabItem();
+            }
+          }
+          break;
+        case EditorType::kDungeon:
+          if (BeginTabItem("Dungeon", &open)) {
+            current_editor_ = &dungeon_editor_;
+            status_ = dungeon_editor_.Update();
+            if (overworld_editor_.jump_to_tab() != -1) {
+              dungeon_editor_.add_room(overworld_editor_.jump_to_tab());
+              overworld_editor_.jump_to_tab_ = -1;
+            }
+            EndTabItem();
+          }
+          break;
+        case EditorType::kGraphics:
+          if (BeginTabItem("Graphics", &open)) {
+            current_editor_ = &graphics_editor_;
+            status_ = graphics_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kMusic:
+          if (BeginTabItem("Music", &open)) {
+            current_editor_ = &music_editor_;
+
+            status_ = music_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kPalette:
+          if (BeginTabItem("Palette", &open)) {
+            current_editor_ = &palette_editor_;
+            status_ = palette_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kScreen:
+          if (BeginTabItem("Screen", &open)) {
+            current_editor_ = &screen_editor_;
+            status_ = screen_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kSprite:
+          if (BeginTabItem("Sprite", &open)) {
+            current_editor_ = &sprite_editor_;
+            status_ = sprite_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kAssembly:
+          if (BeginTabItem("Code", &open)) {
+            current_editor_ = &assembly_editor_;
+            assembly_editor_.UpdateCodeView();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kSettings:
+          if (BeginTabItem("Settings", &open)) {
+            current_editor_ = &settings_editor_;
+            status_ = settings_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        case EditorType::kMessage:
+          if (BeginTabItem("Message", &open)) {
+            current_editor_ = &message_editor_;
+            status_ = message_editor_.Update();
+            EndTabItem();
+          }
+          break;
+        default:
+          break;
+      }
+      if (!open) {
+        active_editors_.erase(
+            std::remove(active_editors_.begin(), active_editors_.end(), editor),
+            active_editors_.end());
+      }
+    }
+
+    if (TabItemButton(ICON_MD_ADD, ImGuiTabItemFlags_Trailing)) {
+      show_add_editor = true;
+    }
+
+    EndTabBar();
+  }
+}
+
+void MasterEditor::ManageKeyboardShortcuts() {
+  bool ctrl_or_super = (GetIO().KeyCtrl || GetIO().KeySuper);
+
+  // If CMD + R is pressed, reload the top result of recent files
+  if (IsKeyDown(ImGuiKey_R) && ctrl_or_super) {
+    static RecentFilesManager manager("recent_files.txt");
+    manager.Load();
+    if (!manager.GetRecentFiles().empty()) {
+      auto front = manager.GetRecentFiles().front();
+      std::cout << "Reloading: " << front << std::endl;
+      OpenRomOrProject(front);
+    }
+  }
+
+  if (IsKeyDown(ImGuiKey_F1)) {
+    about_ = true;
+  }
+
+  // If CMD + Q is pressed, quit the application
+  if (IsKeyDown(ImGuiKey_Q) && ctrl_or_super) {
+    quit_ = true;
+  }
+
+  // If CMD + O is pressed, open a file dialog
+  if (IsKeyDown(ImGuiKey_O) && ctrl_or_super) {
+    LoadRom();
+  }
+
+  // If CMD + S is pressed, save the current ROM
+  if (IsKeyDown(ImGuiKey_S) && ctrl_or_super) {
+    SaveRom();
+  }
+
+  if (IsKeyDown(ImGuiKey_X) && ctrl_or_super) {
+    status_ = current_editor_->Cut();
+  }
+
+  if (IsKeyDown(ImGuiKey_C) && ctrl_or_super) {
+    status_ = current_editor_->Copy();
+  }
+
+  if (IsKeyDown(ImGuiKey_V) && ctrl_or_super) {
+    status_ = current_editor_->Paste();
+  }
+
+  if (IsKeyDown(ImGuiKey_Z) && ctrl_or_super) {
+    status_ = current_editor_->Undo();
+  }
+
+  if (IsKeyDown(ImGuiKey_Y) && ctrl_or_super) {
+    status_ = current_editor_->Redo();
+  }
+
+  if (IsKeyDown(ImGuiKey_F) && ctrl_or_super) {
+    status_ = current_editor_->Find();
+  }
+}
+
+void MasterEditor::DrawFileDialog() {
+  gui::FileDialogPipeline("ChooseFileDlgKey", ".sfc,.smc", std::nullopt, [&]() {
+    std::string filePathName = ImGuiFileDialog::Instance()->GetFilePathName();
+    status_ = rom()->LoadFromFile(filePathName);
+    static RecentFilesManager manager("recent_files.txt");
+
+    // Load existing recent files
+    manager.Load();
+
+    // Add a new file
+    manager.AddFile(filePathName);
+
+    // Save the updated list
+    manager.Save();
+  });
+}
+
+void MasterEditor::DrawStatusPopup() {
+  if (!status_.ok()) {
+    show_status_ = true;
+    prev_status_ = status_;
+  }
+
+  if (show_status_ && (BeginCentered("StatusWindow"))) {
+    Text("%s", ICON_MD_ERROR);
+    Text("%s", prev_status_.ToString().c_str());
+    Spacing();
+    NextColumn();
+    Columns(1);
+    Separator();
+    NewLine();
+    SameLine(128);
+    if (Button("OK", gui::kDefaultModalSize) ||
+        IsKeyPressed(GetKeyIndex(ImGuiKey_Space))) {
+      show_status_ = false;
+      status_ = absl::OkStatus();
+    }
+    SameLine();
+    if (Button(ICON_MD_CONTENT_COPY, ImVec2(50, 0))) {
+      SetClipboardText(prev_status_.ToString().c_str());
+    }
+    End();
+  }
+}
+
+void MasterEditor::DrawAboutPopup() {
+  if (about_) OpenPopup("About");
+  if (BeginPopupModal("About", nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
+    Text("Yet Another Zelda3 Editor - v%.2f", core::kYazeVersion);
+    Text("Written by: scawful");
+    Spacing();
+    Text("Special Thanks: Zarby89, JaredBrian");
+    Separator();
+
+    if (Button("Close", gui::kDefaultModalSize)) {
+      about_ = false;
+      CloseCurrentPopup();
+    }
+    EndPopup();
+  }
+}
+
+void MasterEditor::DrawInfoPopup() {
+  if (rom_info_) OpenPopup("ROM Information");
+  if (BeginPopupModal("ROM Information", nullptr,
+                      ImGuiWindowFlags_AlwaysAutoResize)) {
+    Text("Title: %s", rom()->title());
+    Text("ROM Size: %ld", rom()->size());
+
+    if (Button("Close", gui::kDefaultModalSize) ||
+        IsKeyPressed(GetKeyIndex(ImGuiKey_Space))) {
+      rom_info_ = false;
+      CloseCurrentPopup();
+    }
+    EndPopup();
+  }
+}
+
+void MasterEditor::DrawYazeMenu() {
+  static bool show_display_settings = false;
+  static bool show_command_line_interface = false;
+
+  if (BeginMenuBar()) {
+    DrawFileMenu();
+    DrawEditMenu();
+    DrawViewMenu();
+    DrawTestMenu();
+    DrawProjectMenu();
+    DrawHelpMenu();
+
+    SameLine(GetWindowWidth() - GetStyle().ItemSpacing.x -
+             CalcTextSize(ICON_MD_DISPLAY_SETTINGS).x - 150);
+    // Modify the style of the button to have no background color
+    PushStyleColor(ImGuiCol_Button, ImVec4(0, 0, 0, 0));
+    if (Button(ICON_MD_DISPLAY_SETTINGS)) {
+      show_display_settings = !show_display_settings;
+    }
+
+    if (Button(ICON_MD_TERMINAL)) {
+      show_command_line_interface = !show_command_line_interface;
+    }
+    PopStyleColor();
+
+    Text("%s", absl::StrCat("yaze v", core::kYazeVersion).c_str());
+
+    EndMenuBar();
+  }
+
+  if (show_display_settings) {
+    Begin("Display Settings", &show_display_settings, ImGuiWindowFlags_None);
+    gui::DrawDisplaySettings();
+    End();
+  }
+
+  if (show_command_line_interface) {
+    Begin("Command Line Interface", &show_command_line_interface,
+          ImGuiWindowFlags_None);
+    Text("Enter a command:");
+    End();
+  }
+}
+
+void MasterEditor::OpenRomOrProject(const std::string& filename) {
+  if (absl::StrContains(filename, ".yaze")) {
+    status_ = current_project_.Open(filename);
+    if (status_.ok()) {
+      status_ = OpenProject();
+    }
+  } else {
+    status_ = rom()->LoadFromFile(filename);
+  }
+}
+
+void MasterEditor::DrawFileMenu() {
+  static bool save_as_menu = false;
+  static bool new_project_menu = false;
+
+  if (BeginMenu("File")) {
+    if (MenuItem("Open", "Ctrl+O")) {
+      LoadRom();
+    }
+
+    if (BeginMenu("Open Recent")) {
+      static RecentFilesManager manager("recent_files.txt");
+      manager.Load();
+      if (manager.GetRecentFiles().empty()) {
+        MenuItem("No Recent Files", nullptr, false, false);
+      } else {
+        for (const auto& filePath : manager.GetRecentFiles()) {
+          if (MenuItem(filePath.c_str())) {
+            OpenRomOrProject(filePath);
+          }
+        }
+      }
+      EndMenu();
+    }
+
+    MENU_ITEM2("Save", "Ctrl+S") {
+      if (rom()->is_loaded()) {
+        SaveRom();
+      }
+    }
+    MENU_ITEM("Save As..") { save_as_menu = true; }
+
+    if (rom()->is_loaded()) {
+      MENU_ITEM("Reload") { status_ = rom()->Reload(); }
+      MENU_ITEM("Close") {
+        status_ = rom()->Close();
+        rom_assets_loaded_ = false;
+      }
+    }
+
+    Separator();
+
+    if (BeginMenu("Project")) {
+      if (MenuItem("Create New Project")) {
+        // Create a new project
+        new_project_menu = true;
+      }
+      if (MenuItem("Open Project")) {
+        // Open an existing project
+        status_ =
+            current_project_.Open(FileDialogWrapper::ShowOpenFileDialog());
+        if (status_.ok()) {
+          status_ = OpenProject();
+        }
+      }
+      if (MenuItem("Save Project")) {
+        // Save the current project
+        status_ = current_project_.Save();
+      }
+
+      EndMenu();
+    }
+
+    if (BeginMenu("Options")) {
+      MenuItem("Backup ROM", "", &backup_rom_);
+      MenuItem("Save New Auto", "", &save_new_auto_);
+      Separator();
+      if (BeginMenu("Experiment Flags")) {
+        static FlagsMenu flags_menu;
+        flags_menu.Draw();
+        EndMenu();
+      }
+      EndMenu();
+    }
+
+    Separator();
+
+    if (MenuItem("Quit", "Ctrl+Q")) {
+      quit_ = true;
+    }
+
+    EndMenu();
+  }
+
+  if (save_as_menu) {
+    static std::string save_as_filename = "";
+    Begin("Save As..", &save_as_menu, ImGuiWindowFlags_AlwaysAutoResize);
+    InputText("Filename", &save_as_filename);
+    if (Button("Save", gui::kDefaultModalSize)) {
+      SaveRom();
+      save_as_menu = false;
+    }
+    SameLine();
+    if (Button("Cancel", gui::kDefaultModalSize)) {
+      save_as_menu = false;
+    }
+    End();
+  }
+
+  if (new_project_menu) {
+    Begin("New Project", &new_project_menu, ImGuiWindowFlags_AlwaysAutoResize);
+    static std::string save_as_filename = "";
+    InputText("Project Name", &save_as_filename);
+    if (Button("Destination Filepath", gui::kDefaultModalSize)) {
+      current_project_.filepath = FileDialogWrapper::ShowOpenFolderDialog();
+    }
+    SameLine();
+    Text("%s", current_project_.filepath.c_str());
+    if (Button("ROM File", gui::kDefaultModalSize)) {
+      current_project_.rom_filename_ = FileDialogWrapper::ShowOpenFileDialog();
+    }
+    SameLine();
+    Text("%s", current_project_.rom_filename_.c_str());
+    if (Button("Labels File", gui::kDefaultModalSize)) {
+      current_project_.labels_filename_ =
+          FileDialogWrapper::ShowOpenFileDialog();
+    }
+    SameLine();
+    Text("%s", current_project_.labels_filename_.c_str());
+    if (Button("Code Folder", gui::kDefaultModalSize)) {
+      current_project_.code_folder_ = FileDialogWrapper::ShowOpenFolderDialog();
+    }
+    SameLine();
+    Text("%s", current_project_.code_folder_.c_str());
+
+    Separator();
+    if (Button("Create", gui::kDefaultModalSize)) {
+      new_project_menu = false;
+      status_ = current_project_.Create(save_as_filename);
+      if (status_.ok()) {
+        status_ = current_project_.Save();
+      }
+    }
+    SameLine();
+    if (Button("Cancel", gui::kDefaultModalSize)) {
+      new_project_menu = false;
+    }
+    End();
+  }
+}
+
+void MasterEditor::DrawEditMenu() {
+  if (BeginMenu("Edit")) {
+    MENU_ITEM2("Undo", "Ctrl+Z") { status_ = current_editor_->Undo(); }
+    MENU_ITEM2("Redo", "Ctrl+Y") { status_ = current_editor_->Redo(); }
+    Separator();
+    MENU_ITEM2("Cut", "Ctrl+X") { status_ = current_editor_->Cut(); }
+    MENU_ITEM2("Copy", "Ctrl+C") { status_ = current_editor_->Copy(); }
+    MENU_ITEM2("Paste", "Ctrl+V") { status_ = current_editor_->Paste(); }
+    Separator();
+    MENU_ITEM2("Find", "Ctrl+F") {}
+    EndMenu();
+  }
+}
+
+void MasterEditor::DrawViewMenu() {
+  static bool show_imgui_metrics = false;
+  static bool show_memory_editor = false;
+  static bool show_asm_editor = false;
+  static bool show_imgui_demo = false;
+  static bool show_palette_editor = false;
+  static bool show_emulator = false;
+
+  if (show_emulator) {
+    Begin("Emulator", &show_emulator, ImGuiWindowFlags_MenuBar);
+    emulator_.Run();
+    End();
+  }
+
+  if (show_imgui_metrics) {
+    ShowMetricsWindow(&show_imgui_metrics);
+  }
+
+  if (show_memory_editor) {
+    memory_editor_.Update(show_memory_editor);
+  }
+
+  if (show_imgui_demo) {
+    ShowDemoWindow();
+  }
+
+  if (show_asm_editor) {
+    assembly_editor_.Update(show_asm_editor);
+  }
+
+  if (show_palette_editor) {
+    Begin("Palette Editor", &show_palette_editor);
+    status_ = palette_editor_.Update();
+    End();
+  }
+
+  if (BeginMenu("View")) {
+    MenuItem("Emulator", nullptr, &show_emulator);
+    Separator();
+    MenuItem("Memory Editor", nullptr, &show_memory_editor);
+    MenuItem("Assembly Editor", nullptr, &show_asm_editor);
+    MenuItem("Palette Editor", nullptr, &show_palette_editor);
+    Separator();
+    MENU_ITEM("ROM Information") rom_info_ = true;
+    Separator();
+    MenuItem("ImGui Demo", nullptr, &show_imgui_demo);
+    MenuItem("ImGui Metrics", nullptr, &show_imgui_metrics);
+    EndMenu();
+  }
+}
+
+void MasterEditor::DrawTestMenu() {
+  static bool show_tests_ = false;
+
+  if (BeginMenu("Tests")) {
+    MenuItem("Run Tests", nullptr, &show_tests_);
+    EndMenu();
+  }
+
+}
+
+void MasterEditor::DrawProjectMenu() {
+  static bool show_resource_label_manager = false;
+
+  if (current_project_.project_opened_) {
+    // Project Menu
+    if (BeginMenu("Project")) {
+      Text("Name: %s", current_project_.name.c_str());
+      Text("ROM: %s", current_project_.rom_filename_.c_str());
+      Text("Labels: %s", current_project_.labels_filename_.c_str());
+      Text("Code: %s", current_project_.code_folder_.c_str());
+      Separator();
+      MenuItem("Resource Labels", nullptr, &show_resource_label_manager);
+      EndMenu();
+    }
+  }
+  if (show_resource_label_manager) {
+    rom()->resource_label()->DisplayLabels(&show_resource_label_manager);
+    if (current_project_.project_opened_ &&
+        !current_project_.labels_filename_.empty()) {
+      current_project_.labels_filename_ = rom()->resource_label()->filename_;
+    }
+  }
+}
+
+void MasterEditor::DrawHelpMenu() {
+  static bool open_rom_help = false;
+  static bool open_supported_features = false;
+  static bool open_manage_project = false;
+  if (BeginMenu("Help")) {
+    if (MenuItem("How to open a ROM")) open_rom_help = true;
+    if (MenuItem("Supported Features")) open_supported_features = true;
+    if (MenuItem("How to manage a project")) open_manage_project = true;
+
+    if (MenuItem("About", "F1")) about_ = true;
+    EndMenu();
+  }
+
+  if (open_supported_features) OpenPopup("Supported Features");
+  if (BeginPopupModal("Supported Features", nullptr,
+                      ImGuiWindowFlags_AlwaysAutoResize)) {
+    Text("Overworld");
+    BulletText("LW/DW/SW Tilemap Editing");
+    BulletText("LW/DW/SW Map Properties");
+    BulletText("Create/Delete/Update Entrances");
+    BulletText("Create/Delete/Update Exits");
+    BulletText("Create/Delete/Update Sprites");
+    BulletText("Create/Delete/Update Items");
+
+    Text("Dungeon");
+    BulletText("View Room Header Properties");
+    BulletText("View Entrance Properties");
+
+    Text("Graphics");
+    BulletText("View Decompressed Graphics Sheets");
+    BulletText("View/Update Graphics Groups");
+
+    Text("Palettes");
+    BulletText("View Palette Groups");
+
+    Text("Saveable");
+    BulletText("All Listed Overworld Features");
+    BulletText("Hex Editor Changes");
+
+    if (Button("Close", gui::kDefaultModalSize)) {
+      open_supported_features = false;
+      CloseCurrentPopup();
+    }
+    EndPopup();
+  }
+
+  if (open_rom_help) OpenPopup("Open a ROM");
+  if (BeginPopupModal("Open a ROM", nullptr,
+                      ImGuiWindowFlags_AlwaysAutoResize)) {
+    Text("File -> Open");
+    Text("Select a ROM file to open");
+    Text("Supported ROMs (headered or unheadered):");
+    Text("The Legend of Zelda: A Link to the Past");
+    Text("US Version 1.0");
+    Text("JP Version 1.0");
+
+    if (Button("Close", gui::kDefaultModalSize)) {
+      open_rom_help = false;
+      CloseCurrentPopup();
+    }
+    EndPopup();
+  }
+
+  if (open_manage_project) OpenPopup("Manage Project");
+  if (BeginPopupModal("Manage Project", nullptr,
+                      ImGuiWindowFlags_AlwaysAutoResize)) {
+    Text("Project Menu");
+    Text("Create a new project or open an existing one.");
+    Text("Save the project to save the current state of the project.");
+    Text(
+        "To save a project, you need to first open a ROM and initialize your "
+        "code path and labels file. Label resource manager can be found in "
+        "the "
+        "View menu. Code path is set in the Code editor after opening a "
+        "folder.");
+
+    if (Button("Close", gui::kDefaultModalSize)) {
+      open_manage_project = false;
+      CloseCurrentPopup();
+    }
+    EndPopup();
+  }
+}
+
+void MasterEditor::LoadRom() {
+  if (flags()->kNewFileDialogWrapper) {
+    auto file_name = FileDialogWrapper::ShowOpenFileDialog();
+    PRINT_IF_ERROR(rom()->LoadFromFile(file_name));
+    static RecentFilesManager manager("recent_files.txt");
+    manager.Load();
+    manager.AddFile(file_name);
+    manager.Save();
+  } else {
+    ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Open ROM",
+                                            ".sfc,.smc", ".");
+  }
+}
+
+void MasterEditor::SaveRom() {
+  if (flags()->kSaveDungeonMaps) {
+    status_ = screen_editor_.SaveDungeonMaps();
+    RETURN_VOID_IF_ERROR(status_);
+  }
+  if (flags()->overworld.kSaveOverworldMaps) {
+    RETURN_VOID_IF_ERROR(
+        status_ = overworld_editor_.overworld()->CreateTile32Tilemap());
+    status_ = overworld_editor_.overworld()->SaveMap32Tiles();
+    RETURN_VOID_IF_ERROR(status_);
+    status_ = overworld_editor_.overworld()->SaveMap16Tiles();
+    RETURN_VOID_IF_ERROR(status_);
+    status_ = overworld_editor_.overworld()->SaveOverworldMaps();
+    RETURN_VOID_IF_ERROR(status_);
+  }
+  if (flags()->overworld.kSaveOverworldEntrances) {
+    status_ = overworld_editor_.overworld()->SaveEntrances();
+    RETURN_VOID_IF_ERROR(status_);
+  }
+  if (flags()->overworld.kSaveOverworldExits) {
+    status_ = overworld_editor_.overworld()->SaveExits();
+    RETURN_VOID_IF_ERROR(status_);
+  }
+  if (flags()->overworld.kSaveOverworldItems) {
+    status_ = overworld_editor_.overworld()->SaveItems();
+    RETURN_VOID_IF_ERROR(status_);
+  }
+  if (flags()->overworld.kSaveOverworldProperties) {
+    status_ = overworld_editor_.overworld()->SaveMapProperties();
+    RETURN_VOID_IF_ERROR(status_);
+  }
+
+  status_ = rom()->SaveToFile(backup_rom_, save_new_auto_);
+}
+
+absl::Status MasterEditor::OpenProject() {
+  RETURN_IF_ERROR(rom()->LoadFromFile(current_project_.rom_filename_));
+
+  if (!rom()->resource_label()->LoadLabels(current_project_.labels_filename_)) {
+    return absl::InternalError(
+        "Could not load labels file, update your project file.");
+  }
+
+  static RecentFilesManager manager("recent_files.txt");
+  manager.Load();
+  manager.AddFile(current_project_.filepath + "/" + current_project_.name +
+                  ".yaze");
+  manager.Save();
+
+  assembly_editor_.OpenFolder(current_project_.code_folder_);
+
+  current_project_.project_opened_ = true;
+
+  return absl::OkStatus();
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/master_editor.h

@@ -0,0 +1,141 @@
+#ifndef YAZE_APP_EDITOR_MASTER_EDITOR_H
+#define YAZE_APP_EDITOR_MASTER_EDITOR_H
+
+#define IMGUI_DEFINE_MATH_OPERATORS
+
+#include "ImGuiColorTextEdit/TextEditor.h"
+#include "ImGuiFileDialog/ImGuiFileDialog.h"
+#include "imgui/imgui.h"
+#include "imgui/misc/cpp/imgui_stdlib.h"
+#include "imgui_memory_editor.h"
+
+#include "absl/status/status.h"
+#include "app/core/common.h"
+#include "app/core/constants.h"
+#include "app/core/project.h"
+#include "app/editor/code/assembly_editor.h"
+#include "app/editor/code/memory_editor.h"
+#include "app/editor/dungeon/dungeon_editor.h"
+#include "app/editor/graphics/graphics_editor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/graphics/screen_editor.h"
+#include "app/editor/message/message_editor.h"
+#include "app/editor/music/music_editor.h"
+#include "app/editor/overworld_editor.h"
+#include "app/editor/settings_editor.h"
+#include "app/editor/sprite/sprite_editor.h"
+#include "app/editor/utils/gfx_context.h"
+#include "app/emu/emulator.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+/**
+ * @class MasterEditor
+ * @brief The MasterEditor class represents the main editor for a Rom in the
+ * Yaze application.
+ *
+ * This class inherits from SharedRom, GfxContext, and ExperimentFlags, and
+ * provides functionality for setting up the screen, updating the editor, and
+ * shutting down the editor. It also includes methods for drawing various menus
+ * and popups, saving the Rom, and managing editor-specific flags.
+ *
+ * The MasterEditor class contains instances of various editor classes such as
+ * AssemblyEditor, DungeonEditor, GraphicsEditor, MusicEditor, OverworldEditor,
+ * PaletteEditor, ScreenEditor, and SpriteEditor. The current_editor_ member
+ * variable points to the currently active editor in the tab view.
+ *
+ * @note This class assumes the presence of an SDL_Renderer object for rendering
+ * graphics.
+ */
+class MasterEditor : public SharedRom,
+                     public context::GfxContext,
+                     public core::ExperimentFlags {
+ public:
+  MasterEditor() {
+    current_editor_ = &overworld_editor_;
+    active_editors_.push_back(&overworld_editor_);
+    active_editors_.push_back(&dungeon_editor_);
+    active_editors_.push_back(&graphics_editor_);
+    active_editors_.push_back(&palette_editor_);
+    active_editors_.push_back(&sprite_editor_);
+    active_editors_.push_back(&message_editor_);
+  }
+
+  void SetupScreen(std::shared_ptr<SDL_Renderer> renderer,
+                   std::string filename = "");
+  absl::Status Update();
+
+  auto emulator() -> emu::Emulator& { return emulator_; }
+  auto quit() { return quit_; }
+  auto overworld_editor() -> OverworldEditor& { return overworld_editor_; }
+
+ private:
+  void ManageActiveEditors();
+  void ManageKeyboardShortcuts();
+  void OpenRomOrProject(const std::string& filename);
+
+  void DrawFileDialog();
+  void DrawStatusPopup();
+  void DrawAboutPopup();
+  void DrawInfoPopup();
+
+  void DrawYazeMenu();
+  void DrawFileMenu();
+  void DrawEditMenu();
+  void DrawViewMenu();
+  void DrawTestMenu();
+  void DrawProjectMenu();
+  void DrawHelpMenu();
+
+  void LoadRom();
+  void SaveRom();
+
+  absl::Status OpenProject();
+
+  bool quit_ = false;
+  bool about_ = false;
+  bool rom_info_ = false;
+  bool backup_rom_ = false;
+  bool save_new_auto_ = true;
+  bool show_status_ = false;
+  bool rom_assets_loaded_ = false;
+
+  absl::Status status_;
+  absl::Status prev_status_;
+
+  std::shared_ptr<SDL_Renderer> sdl_renderer_;
+
+  emu::Emulator emulator_;
+
+  Project current_project_;
+
+  AssemblyEditor assembly_editor_;
+  DungeonEditor dungeon_editor_;
+  GraphicsEditor graphics_editor_;
+  MusicEditor music_editor_;
+  OverworldEditor overworld_editor_;
+  PaletteEditor palette_editor_;
+  ScreenEditor screen_editor_;
+  SpriteEditor sprite_editor_;
+  SettingsEditor settings_editor_;
+  MessageEditor message_editor_;
+  MemoryEditorWithDiffChecker memory_editor_;
+
+  ImVector<int> active_tabs_;
+  std::vector<Editor*> active_editors_;
+  Editor* current_editor_ = nullptr;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_MASTER_EDITOR_H

src/app/editor/master_editor_test.cc

@@ -0,0 +1,10 @@
+#include "master_editor.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/message/message_data.h

@@ -0,0 +1,177 @@
+#ifndef YAZE_APP_EDITOR_MESSAGE_MESSAGE_DATA_H
+#define YAZE_APP_EDITOR_MESSAGE_MESSAGE_DATA_H
+
+#include <string>
+#include <vector>
+
+#include "absl/strings/str_cat.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+const uint8_t MESSAGETERMINATOR = 0x7F;
+
+static std::string AddNewLinesToCommands(std::string str);
+static std::string ReplaceAllDictionaryWords(std::string str);
+static std::vector<uint8_t> ParseMessageToData(std::string str);
+
+const std::string CHEESE = "\uBEBE";  // Inserted into commands to protect
+                                      // them from dictionary replacements.
+
+struct MessageData {
+  int ID;
+  int Address;
+  std::string RawString;
+  std::string ContentsParsed;
+  std::vector<uint8_t> Data;
+  std::vector<uint8_t> DataParsed;
+
+  MessageData() = default;
+  MessageData(int id, int address, const std::string& rawString,
+              const std::vector<uint8_t>& rawData,
+              const std::string& parsedString,
+              const std::vector<uint8_t>& parsedData)
+      : ID(id),
+        Address(address),
+        RawString(rawString),
+        Data(rawData),
+        DataParsed(parsedData),
+        ContentsParsed(parsedString) {}
+
+  // Copy constructor
+  MessageData(const MessageData& other) {
+    ID = other.ID;
+    Address = other.Address;
+    RawString = other.RawString;
+    Data = other.Data;
+    DataParsed = other.DataParsed;
+    ContentsParsed = other.ContentsParsed;
+  }
+
+  void SetMessage(std::string messageString) {
+    ContentsParsed = messageString;
+    RawString = OptimizeMessageForDictionary(messageString);
+    RecalculateData();
+  }
+
+  std::string ToString() {
+    return absl::StrFormat("%0X - %s", ID, ContentsParsed);
+  }
+
+  std::string GetReadableDumpedContents() {
+    std::stringstream stringBuilder;
+    for (const auto& b : Data) {
+      stringBuilder << absl::StrFormat("%0X ", b);
+    }
+    stringBuilder << absl::StrFormat("%00X", MESSAGETERMINATOR);
+
+    return absl::StrFormat(
+        "[[[[\r\nMessage "
+        "%000X]]]]\r\n[Contents]\r\n%s\r\n\r\n[Data]\r\n%s"
+        "\r\n\r\n\r\n\r\n",
+        ID, AddNewLinesToCommands(ContentsParsed), stringBuilder.str());
+  }
+
+  std::string GetDumpedContents() {
+    return absl::StrFormat("%000X : %s\r\n\r\n", ID, ContentsParsed);
+  }
+
+  std::string OptimizeMessageForDictionary(std::string messageString) {
+    std::stringstream protons;
+    bool command = false;
+    for (const auto& c : messageString) {
+      if (c == '[') {
+        command = true;
+      } else if (c == ']') {
+        command = false;
+      }
+
+      protons << c;
+      if (command) {
+        protons << CHEESE;
+      }
+    }
+
+    std::string protonsString = protons.str();
+    std::string replacedString = ReplaceAllDictionaryWords(protonsString);
+    std::string finalString =
+        absl::StrReplaceAll(replacedString, {{CHEESE, ""}});
+
+    return finalString;
+  }
+
+  void RecalculateData() {
+    Data = ParseMessageToData(RawString);
+    DataParsed = ParseMessageToData(ContentsParsed);
+  }
+};
+
+struct TextElement {
+  uint8_t ID;
+  std::string Token;
+  std::string GenericToken;
+  std::string Pattern;
+  std::string StrictPattern;
+  std::string Description;
+  bool HasArgument;
+
+  TextElement() = default;
+  TextElement(uint8_t id, std::string token, bool arg,
+              std::string description) {
+    ID = id;
+    Token = token;
+    if (arg) {
+      GenericToken = absl::StrFormat("[%s:##]", Token);
+    } else {
+      GenericToken = absl::StrFormat("[%s]", Token);
+    }
+    HasArgument = arg;
+    Description = description;
+    Pattern =
+        arg ? "\\[" + Token + ":?([0-9A-F]{1,2})\\]" : "\\[" + Token + "\\]";
+    Pattern = absl::StrReplaceAll(Pattern, {{"[", "\\["}, {"]", "\\]"}});
+    StrictPattern = absl::StrCat("^", Pattern, "$");
+    StrictPattern = "^" + Pattern + "$";
+  }
+
+  std::string GetParameterizedToken(uint8_t value = 0) {
+    if (HasArgument) {
+      return absl::StrFormat("[%s:%02X]", Token, value);
+    } else {
+      return absl::StrFormat("[%s]", Token);
+    }
+  }
+
+  std::string ToString() {
+    return absl::StrFormat("%s %s", GenericToken, Description);
+  }
+
+  std::smatch MatchMe(std::string dfrag) const {
+    std::regex pattern(StrictPattern);
+    std::smatch match;
+    std::regex_match(dfrag, match, pattern);
+    return match;
+  }
+
+  bool Empty() { return ID == 0; }
+};
+
+struct ParsedElement {
+  TextElement Parent;
+  uint8_t Value;
+  bool Active = false;
+
+  ParsedElement() = default;
+  ParsedElement(TextElement textElement, uint8_t value) {
+    Parent = textElement;
+    Value = value;
+    Active = true;
+  }
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_MESSAGE_MESSAGE_DATA_H

src/app/editor/message/message_editor.cc

@@ -0,0 +1,770 @@
+#include "message_editor.h"
+
+#include <regex>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "absl/status/status.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/str_replace.h"
+#include "absl/strings/str_split.h"
+#include "app/core/common.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/style.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::Begin;
+using ImGui::BeginChild;
+using ImGui::BeginTable;
+using ImGui::Button;
+using ImGui::End;
+using ImGui::EndChild;
+using ImGui::EndTable;
+using ImGui::InputText;
+using ImGui::InputTextMultiline;
+using ImGui::SameLine;
+using ImGui::Separator;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+using ImGui::TextWrapped;
+using ImGui::TreeNode;
+
+static ParsedElement FindMatchingElement(string str) {
+  std::smatch match;
+  for (auto& textElement : TextCommands) {
+    match = textElement.MatchMe(str);
+    if (match.size() > 0) {
+      if (textElement.HasArgument) {
+        return ParsedElement(textElement,
+                             std::stoi(match[1].str(), nullptr, 16));
+      } else {
+        return ParsedElement(textElement, 0);
+      }
+    }
+  }
+
+  match = DictionaryElement.MatchMe(str);
+  if (match.size() > 0) {
+    return ParsedElement(DictionaryElement,
+                         DICTOFF + std::stoi(match[1].str(), nullptr, 16));
+  }
+  return ParsedElement();
+}
+
+static string ReplaceAllDictionaryWords(string str) {
+  string temp = str;
+  for (const auto& entry : AllDictionaries) {
+    if (absl::StrContains(temp, entry.Contents)) {
+      temp = absl::StrReplaceAll(temp, {{entry.Contents, entry.Contents}});
+    }
+  }
+
+  return temp;
+}
+
+static std::vector<uint8_t> ParseMessageToData(string str) {
+  std::vector<uint8_t> bytes;
+  string tempString = str;
+  int pos = 0;
+
+  while (pos < tempString.size()) {
+    // Get next text fragment.
+    if (tempString[pos] == '[') {
+      int next = tempString.find(']', pos);
+      if (next == -1) {
+        break;
+      }
+
+      ParsedElement parsedElement =
+          FindMatchingElement(tempString.substr(pos, next - pos + 1));
+      if (!parsedElement.Active) {
+        break;  // TODO: handle badness.
+        // } else if (parsedElement.Parent == DictionaryElement) {
+        //   bytes.push_back(parsedElement.Value);
+      } else {
+        bytes.push_back(parsedElement.Parent.ID);
+
+        if (parsedElement.Parent.HasArgument) {
+          bytes.push_back(parsedElement.Value);
+        }
+      }
+
+      pos = next + 1;
+      continue;
+    } else {
+      uint8_t bb = MessageEditor::FindMatchingCharacter(tempString[pos++]);
+
+      if (bb != 0xFF) {
+        // TODO: handle badness.
+        bytes.push_back(bb);
+      }
+    }
+  }
+
+  return bytes;
+}
+
+absl::Status MessageEditor::Update() {
+  if (rom()->is_loaded() && !data_loaded_) {
+    RETURN_IF_ERROR(Initialize());
+    CurrentMessage = ListOfTexts[1];
+    data_loaded_ = true;
+  }
+
+  if (BeginTable("##MessageEditor", 3,
+                 ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable)) {
+    TableSetupColumn("List");
+    TableSetupColumn("Contents");
+    TableSetupColumn("Commands");
+
+    TableHeadersRow();
+
+    TableNextColumn();
+    DrawMessageList();
+
+    TableNextColumn();
+    DrawCurrentMessage();
+
+    TableNextColumn();
+    DrawTextCommands();
+
+    EndTable();
+  }
+
+  return absl::OkStatus();
+}
+
+void MessageEditor::DrawMessageList() {
+  if (InputText("Search", &search_text_)) {
+    DisplayedMessages.clear();
+    for (const auto& message : ListOfTexts) {
+      if (absl::StrContains(message.ContentsParsed, search_text_)) {
+        DisplayedMessages.push_back(message);
+      }
+    }
+  }
+
+  if (BeginChild("##MessagesList", ImVec2(0, 0), true,
+                 ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
+    if (BeginTable("##MessagesTable", 3,
+                   ImGuiTableFlags_Hideable | ImGuiTableFlags_Borders |
+                       ImGuiTableFlags_Resizable)) {
+      TableSetupColumn("ID");
+      TableSetupColumn("Contents");
+      TableSetupColumn("Data");
+
+      TableHeadersRow();
+
+      for (const auto& message : ListOfTexts) {
+        TableNextColumn();
+        if (Button(core::UppercaseHexWord(message.ID).c_str())) {
+          CurrentMessage = message;
+          DrawMessagePreview();
+        }
+        TableNextColumn();
+        TextWrapped("%s", ParsedMessages[message.ID].c_str());
+        TableNextColumn();
+        TextWrapped(
+            "%s",
+            core::UppercaseHexLong(ListOfTexts[message.ID].Address).c_str());
+      }
+
+      EndTable();
+    }
+    EndChild();
+  }
+}
+
+void MessageEditor::DrawCurrentMessage() {
+  Button(absl::StrCat("Message ", CurrentMessage.ID).c_str());
+  if (InputTextMultiline("##MessageEditor", &ParsedMessages[CurrentMessage.ID],
+                         ImVec2(ImGui::GetContentRegionAvail().x, 0))) {
+    CurrentMessage.Data = ParseMessageToData(message_text_box_.text);
+    DrawMessagePreview();
+  }
+  Separator();
+
+  Text("Font Graphics");
+  gui::BeginPadding(1);
+  BeginChild("MessageEditorCanvas", ImVec2(0, 130));
+  font_gfx_canvas_.DrawBackground();
+  font_gfx_canvas_.DrawContextMenu();
+  font_gfx_canvas_.DrawBitmap(font_gfx_bitmap_, 0, 0);
+  font_gfx_canvas_.DrawGrid();
+  font_gfx_canvas_.DrawOverlay();
+  EndChild();
+  gui::EndPadding();
+  Separator();
+
+  Text("Message Preview");
+  if (Button("Refresh Bitmap")) {
+    rom()->UpdateBitmap(&current_font_gfx16_bitmap_);
+  }
+  gui::BeginPadding(1);
+  BeginChild("CurrentGfxFont", ImVec2(0, 0), true,
+             ImGuiWindowFlags_AlwaysVerticalScrollbar);
+  current_font_gfx16_canvas_.DrawBackground();
+  gui::EndPadding();
+  current_font_gfx16_canvas_.DrawContextMenu();
+  current_font_gfx16_canvas_.DrawBitmap(current_font_gfx16_bitmap_, 0, 0);
+  current_font_gfx16_canvas_.DrawGrid();
+  current_font_gfx16_canvas_.DrawOverlay();
+  EndChild();
+}
+
+void MessageEditor::DrawTextCommands() {
+  if (BeginChild("##TextCommands", ImVec2(0, 0), true,
+                 ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
+    for (const auto& text_element : TextCommands) {
+      if (Button(text_element.GenericToken.c_str())) {
+      }
+      SameLine();
+      TextWrapped("%s", text_element.Description.c_str());
+      Separator();
+    }
+    EndChild();
+  }
+}
+
+absl::Status MessageEditor::Initialize() {
+  for (int i = 0; i < 100; i++) {
+    width_array[i] = rom()->data()[kCharactersWidth + i];
+  }
+
+  BuildDictionaryEntries();
+  ReadAllTextData();
+
+  font_preview_colors_.AddColor(0x7FFF);  // White
+  font_preview_colors_.AddColor(0x7C00);  // Red
+  font_preview_colors_.AddColor(0x03E0);  // Green
+  font_preview_colors_.AddColor(0x001F);  // Blue
+
+  std::vector<uint8_t> data(0x4000, 0);
+  for (int i = 0; i < 0x4000; i++) {
+    data[i] = rom()->data()[kGfxFont + i];
+  }
+  font_gfx16_data = gfx::SnesTo8bppSheet(data, /*bpp=*/2);
+
+  // 4bpp
+  RETURN_IF_ERROR(rom()->CreateAndRenderBitmap(
+      128, 128, 8, font_gfx16_data, font_gfx_bitmap_, font_preview_colors_))
+
+  current_font_gfx16_data_.reserve(172 * 4096);
+  for (int i = 0; i < 172 * 4096; i++) {
+    current_font_gfx16_data_.push_back(0);
+  }
+
+  // 8bpp
+  RETURN_IF_ERROR(rom()->CreateAndRenderBitmap(
+      172, 4096, 64, current_font_gfx16_data_, current_font_gfx16_bitmap_,
+      font_preview_colors_))
+
+  gfx::SnesPalette color_palette = font_gfx_bitmap_.palette();
+  for (int i = 0; i < font_preview_colors_.size(); i++) {
+    *color_palette.mutable_color(i) = font_preview_colors_[i];
+  }
+
+  *font_gfx_bitmap_.mutable_palette() = color_palette;
+
+  for (const auto& message : ListOfTexts) {
+    DisplayedMessages.push_back(message);
+  }
+
+  for (const auto& each_message : ListOfTexts) {
+    // Each string has a [:XX] char encoded
+    // The corresponding character is found in CharEncoder unordered_map
+    std::string parsed_message = "";
+    for (const auto& byte : each_message.Data) {
+      // Find the char byte in the CharEncoder map
+      if (CharEncoder.contains(byte)) {
+        parsed_message.push_back(CharEncoder.at(byte));
+      } else {
+        // If the byte is not found in the CharEncoder map, it is a command
+        // or a dictionary entry
+        if (byte >= DICTOFF && byte < (DICTOFF + 97)) {
+          // Dictionary entry
+          auto dictionaryEntry = GetDictionaryFromID(byte - DICTOFF);
+          parsed_message.append(dictionaryEntry.Contents);
+        } else {
+          // Command
+          TextElement textElement = FindMatchingCommand(byte);
+          if (!textElement.Empty()) {
+            // If the element is line 2, 3 or V we add a newline
+            if (textElement.ID == kScrollVertical || textElement.ID == kLine2 ||
+                textElement.ID == kLine3)
+              parsed_message.append("\n");
+
+            parsed_message.append(textElement.GenericToken);
+          }
+        }
+      }
+    }
+    ParsedMessages.push_back(parsed_message);
+  }
+
+  DrawMessagePreview();
+
+  return absl::OkStatus();
+}
+
+void MessageEditor::BuildDictionaryEntries() {
+  for (int i = 0; i < 97; i++) {
+    std::vector<uint8_t> bytes;
+    std::stringstream stringBuilder;
+
+    int address = core::SnesToPc(
+        0x0E0000 + (rom()->data()[kPointersDictionaries + (i * 2) + 1] << 8) +
+        rom()->data()[kPointersDictionaries + (i * 2)]);
+
+    int temppush_backress = core::SnesToPc(
+        0x0E0000 +
+        (rom()->data()[kPointersDictionaries + ((i + 1) * 2) + 1] << 8) +
+        rom()->data()[kPointersDictionaries + ((i + 1) * 2)]);
+
+    while (address < temppush_backress) {
+      uint8_t uint8_tDictionary = rom()->data()[address++];
+      bytes.push_back(uint8_tDictionary);
+      stringBuilder << ParseTextDataByte(uint8_tDictionary);
+    }
+
+    // AllDictionaries[i] = DictionaryEntry{(uint8_t)i, stringBuilder.str()};
+    AllDictionaries.push_back(DictionaryEntry{(uint8_t)i, stringBuilder.str()});
+  }
+
+  // AllDictionaries.OrderByDescending(dictionary = > dictionary.Length);
+  AllDictionaries[0].Length = 0;
+}
+
+void MessageEditor::ReadAllTextData() {
+  int messageID = 0;
+  uint8_t current_byte;
+  int pos = kTextData;
+  std::vector<uint8_t> temp_bytes_raw;
+  std::vector<uint8_t> temp_bytes_parsed;
+
+  std::string current_message_raw;
+  std::string current_message_parsed;
+  TextElement text_element;
+
+  while (true) {
+    current_byte = rom()->data()[pos++];
+
+    if (current_byte == MESSAGETERMINATOR) {
+      auto message =
+          MessageData(messageID++, pos, current_message_raw, temp_bytes_raw,
+                      current_message_parsed, temp_bytes_parsed);
+
+      ListOfTexts.push_back(message);
+
+      temp_bytes_raw.clear();
+      temp_bytes_parsed.clear();
+      current_message_raw.clear();
+      current_message_parsed.clear();
+
+      continue;
+    } else if (current_byte == 0xFF) {
+      break;
+    }
+
+    temp_bytes_raw.push_back(current_byte);
+
+    // Check for command.
+    text_element = FindMatchingCommand(current_byte);
+
+    if (!text_element.Empty()) {
+      temp_bytes_parsed.push_back(current_byte);
+      if (text_element.HasArgument) {
+        current_byte = rom()->data()[pos++];
+        temp_bytes_raw.push_back(current_byte);
+        temp_bytes_parsed.push_back(current_byte);
+      }
+
+      current_message_raw.append(
+          text_element.GetParameterizedToken(current_byte));
+      current_message_parsed.append(
+          text_element.GetParameterizedToken(current_byte));
+
+      if (text_element.Token == BANKToken) {
+        pos = kTextData2;
+      }
+
+      continue;
+    }
+
+    // Check for special characters.
+    text_element = FindMatchingSpecial(current_byte);
+
+    if (!text_element.Empty()) {
+      current_message_raw.append(text_element.GetParameterizedToken());
+      current_message_parsed.append(text_element.GetParameterizedToken());
+      temp_bytes_parsed.push_back(current_byte);
+      continue;
+    }
+
+    // Check for dictionary.
+    int dictionary = FindDictionaryEntry(current_byte);
+
+    if (dictionary >= 0) {
+      current_message_raw.append("[");
+      current_message_raw.append(DICTIONARYTOKEN);
+      current_message_raw.append(":");
+      current_message_raw.append(core::UppercaseHexWord(dictionary));
+      current_message_raw.append("]");
+
+      uint32_t address = core::Get24LocalFromPC(
+          rom()->data(), kPointersDictionaries + (dictionary * 2));
+      uint32_t address_end = core::Get24LocalFromPC(
+          rom()->data(), kPointersDictionaries + ((dictionary + 1) * 2));
+
+      for (uint32_t i = address; i < address_end; i++) {
+        temp_bytes_parsed.push_back(rom()->data()[i]);
+        current_message_parsed.append(ParseTextDataByte(rom()->data()[i]));
+      }
+
+      continue;
+    }
+
+    // Everything else.
+    if (CharEncoder.contains(current_byte)) {
+      std::string str = "";
+      str.push_back(CharEncoder.at(current_byte));
+      current_message_raw.append(str);
+      current_message_parsed.append(str);
+      temp_bytes_parsed.push_back(current_byte);
+    }
+  }
+}
+
+TextElement MessageEditor::FindMatchingCommand(uint8_t b) {
+  TextElement empty_element;
+  for (const auto text_element : TextCommands) {
+    if (text_element.ID == b) {
+      return text_element;
+    }
+  }
+  return empty_element;
+}
+
+TextElement MessageEditor::FindMatchingSpecial(uint8_t value) {
+  TextElement empty_element;
+  for (const auto text_element : SpecialChars) {
+    if (text_element.ID == value) {
+      return text_element;
+    }
+  }
+  return empty_element;
+}
+
+MessageEditor::DictionaryEntry MessageEditor::GetDictionaryFromID(
+    uint8_t value) {
+  if (value < 0 || value >= AllDictionaries.size()) {
+    return DictionaryEntry();
+  }
+  return AllDictionaries[value];
+}
+
+uint8_t MessageEditor::FindDictionaryEntry(uint8_t value) {
+  if (value < DICTOFF || value == 0xFF) {
+    return -1;
+  }
+
+  return value - DICTOFF;
+}
+
+uint8_t MessageEditor::FindMatchingCharacter(char value) {
+  for (const auto [key, char_value] : CharEncoder) {
+    if (value == char_value) {
+      return key;
+    }
+  }
+  return 0xFF;
+}
+
+string MessageEditor::ParseTextDataByte(uint8_t value) {
+  if (CharEncoder.contains(value)) {
+    char c = CharEncoder.at(value);
+    string str = "";
+    str.push_back(c);
+    return str;
+  }
+
+  // Check for command.
+  TextElement textElement = FindMatchingCommand(value);
+  if (!textElement.Empty()) {
+    return textElement.GenericToken;
+  }
+
+  // Check for special characters.
+  textElement = FindMatchingSpecial(value);
+  if (!textElement.Empty()) {
+    return textElement.GenericToken;
+  }
+
+  // Check for dictionary.
+  int dictionary = FindDictionaryEntry(value);
+  if (dictionary >= 0) {
+    return absl::StrFormat("[%s:%X]", DICTIONARYTOKEN, dictionary);
+  }
+
+  return "";
+}
+
+void MessageEditor::DrawTileToPreview(int x, int y, int srcx, int srcy, int pal,
+                                      int sizex, int sizey) {
+  int drawid = srcx + (srcy * 32);
+  for (int yl = 0; yl < sizey * 8; yl++) {
+    for (int xl = 0; xl < 4; xl++) {
+      int mx = xl;
+      int my = yl;
+
+      // Formula information to get tile index position in the array.
+      // ((ID / nbrofXtiles) * (imgwidth/2) + (ID - ((ID/16)*16) ))
+      int tx = ((drawid / 16) * 512) + ((drawid - ((drawid / 16) * 16)) * 4);
+      uint8_t pixel = font_gfx16_data[tx + (yl * 64) + xl];
+
+      // nx,ny = object position, xx,yy = tile position, xl,yl = pixel
+      // position
+      int index = x + (y * 172) + (mx * 2) + (my * 172);
+      if ((pixel & 0x0F) != 0) {
+        current_font_gfx16_data_[index + 1] =
+            (uint8_t)((pixel & 0x0F) + (0 * 4));
+      }
+
+      if (((pixel >> 4) & 0x0F) != 0) {
+        current_font_gfx16_data_[index + 0] =
+            (uint8_t)(((pixel >> 4) & 0x0F) + (0 * 4));
+      }
+    }
+  }
+}
+
+void MessageEditor::DrawStringToPreview(string str) {
+  for (const auto c : str) {
+    DrawCharacterToPreview(c);
+  }
+}
+
+void MessageEditor::DrawCharacterToPreview(char c) {
+  DrawCharacterToPreview(FindMatchingCharacter(c));
+}
+
+void MessageEditor::DrawCharacterToPreview(const std::vector<uint8_t>& text) {
+  for (const uint8_t& value : text) {
+    if (skip_next) {
+      skip_next = false;
+      continue;
+    }
+
+    if (value < 100) {
+      int srcy = value / 16;
+      int srcx = value - (value & (~0xF));
+
+      if (text_pos >= 170) {
+        text_pos = 0;
+        text_line++;
+      }
+
+      DrawTileToPreview(text_pos, text_line * 16, srcx, srcy, 0, 1, 2);
+      text_pos += width_array[value];
+    } else if (value == kLine1) {
+      text_pos = 0;
+      text_line = 0;
+    } else if (value == kScrollVertical) {
+      text_pos = 0;
+      text_line += 1;
+    } else if (value == kLine2) {
+      text_pos = 0;
+      text_line = 1;
+    } else if (value == kLine3) {
+      text_pos = 0;
+      text_line = 2;
+    } else if (value == 0x6B || value == 0x6D || value == 0x6E ||
+               value == 0x77 || value == 0x78 || value == 0x79 ||
+               value == 0x7A) {
+      skip_next = true;
+
+      continue;
+    } else if (value == 0x6C)  // BCD numbers.
+    {
+      DrawCharacterToPreview('0');
+      skip_next = true;
+
+      continue;
+    } else if (value == 0x6A) {
+      // Includes parentheses to be longer, since player names can be up to 6
+      // characters.
+      DrawStringToPreview("(NAME)");
+    } else if (value >= DICTOFF && value < (DICTOFF + 97)) {
+      auto dictionaryEntry = GetDictionaryFromID(value - DICTOFF);
+      DrawCharacterToPreview(dictionaryEntry.Data);
+    }
+  }
+}
+
+void MessageEditor::DrawMessagePreview()  // From Parsing.
+{
+  text_line = 0;
+  for (int i = 0; i < (172 * 4096); i++) {
+    current_font_gfx16_data_[i] = 0;
+  }
+  text_pos = 0;
+  DrawCharacterToPreview(CurrentMessage.Data);
+  shown_lines = 0;
+}
+
+absl::Status MessageEditor::Cut() {
+  // Ensure that text is currently selected in the text box.
+  if (!message_text_box_.text.empty()) {
+    // Cut the selected text in the control and paste it into the Clipboard.
+    message_text_box_.Cut();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status MessageEditor::Paste() {
+  // Determine if there is any text in the Clipboard to paste into the
+  if (ImGui::GetClipboardText() != nullptr) {
+    // Paste the text from the Clipboard into the text box.
+    message_text_box_.Paste();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status MessageEditor::Copy() {
+  // Ensure that text is selected in the text box.
+  if (message_text_box_.selection_length > 0) {
+    // Copy the selected text to the Clipboard.
+    message_text_box_.Copy();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status MessageEditor::Undo() {
+  // Determine if last operation can be undone in text box.
+  if (message_text_box_.can_undo) {
+    // Undo the last operation.
+    message_text_box_.Undo();
+
+    // clear the undo buffer to prevent last action from being redone.
+    message_text_box_.clearUndo();
+  }
+  return absl::OkStatus();
+}
+
+absl::Status MessageEditor::Save() {
+  std::vector<uint8_t> backup = rom()->vector();
+
+  for (int i = 0; i < 100; i++) {
+    RETURN_IF_ERROR(rom()->Write(kCharactersWidth + i, width_array[i]));
+  }
+
+  int pos = kTextData;
+  bool in_second_bank = false;
+
+  for (const auto& message : ListOfTexts) {
+    for (const auto value : message.Data) {
+      RETURN_IF_ERROR(rom()->Write(pos, value));
+
+      if (value == kBlockTerminator) {
+        // Make sure we didn't go over the space available in the first block.
+        // 0x7FFF available.
+        if ((!in_second_bank & pos) > kTextDataEnd) {
+          return absl::InternalError(DisplayTextOverflowError(pos, true));
+        }
+
+        // Switch to the second block.
+        pos = kTextData2 - 1;
+        in_second_bank = true;
+      }
+
+      pos++;
+    }
+
+    RETURN_IF_ERROR(
+        rom()->Write(pos++, MESSAGETERMINATOR));  // , true, "Terminator text"
+  }
+
+  // Verify that we didn't go over the space available for the second block.
+  // 0x14BF available.
+  if ((in_second_bank & pos) > kTextData2End) {
+    // rom()->data() = backup;
+    return absl::InternalError(DisplayTextOverflowError(pos, false));
+  }
+
+  RETURN_IF_ERROR(rom()->Write(pos, 0xFF));  // , true, "End of text"
+
+  return absl::OkStatus();
+}
+
+std::string MessageEditor::DisplayTextOverflowError(int pos, bool bank) {
+  int space = bank ? kTextDataEnd - kTextData : kTextData2End - kTextData2;
+  string bankSTR = bank ? "1st" : "2nd";
+  string posSTR = bank ? absl::StrFormat("%X4", pos & 0xFFFF)
+                       : absl::StrFormat("%X4", (pos - kTextData2) & 0xFFFF);
+  std::string message = absl::StrFormat(
+      "There is too much text data in the %s block to save.\n"
+      "Available: %X4 | Used: %s",
+      bankSTR, space, posSTR);
+  return message;
+}
+
+// push_backs a command to the text field when the push_back command button is
+// pressed or the command is double clicked in the list.
+void MessageEditor::InsertCommandButton_Click_1() {
+  // InsertSelectedText(
+  //     TextCommands[TextCommandList.SelectedIndex].GetParameterizedToken(
+  //         (uint8_t)ParamsBox.HexValue));
+}
+
+// push_backs a special character to the text field when the push_back command
+// button is pressed or the character is double clicked in the list.
+void MessageEditor::InsertSpecialButton_Click() {
+  // InsertSelectedText(
+  //     SpecialChars[SpecialsList.SelectedIndex].GetParameterizedToken());
+}
+
+void MessageEditor::InsertSelectedText(string str) {
+  int textboxPos = message_text_box_.selection_start;
+  from_form = true;
+  // message_text_box_.Text = message_text_box_.Text.Insert(textboxPos, str);
+  from_form = false;
+  message_text_box_.selection_start = textboxPos + str.size();
+  message_text_box_.Focus();
+}
+
+void MessageEditor::Delete() {
+  // Determine if any text is selected in the TextBox control.
+  if (message_text_box_.selection_length == 0) {
+    // clear all of the text in the textbox.
+    message_text_box_.clear();
+  }
+}
+
+void MessageEditor::SelectAll() {
+  // Determine if any text is selected in the TextBox control.
+  if (message_text_box_.selection_length == 0) {
+    // Select all text in the text box.
+    message_text_box_.SelectAll();
+
+    // Move the cursor to the text box.
+    message_text_box_.Focus();
+  }
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/message/message_editor.h

@@ -0,0 +1,366 @@
+#ifndef YAZE_APP_EDITOR_MESSAGE_EDITOR_H
+#define YAZE_APP_EDITOR_MESSAGE_EDITOR_H
+
+#include <iostream>
+#include <regex>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "absl/status/status.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/str_replace.h"
+#include "absl/strings/str_split.h"
+#include "app/editor/message/message_data.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using std::string;
+
+// TEXT EDITOR RELATED CONSTANTS
+const int kGfxFont = 0x70000;  // 2bpp format
+const int kTextData = 0xE0000;
+const int kTextDataEnd = 0xE7FFF;
+const int kTextData2 = 0x75F40;
+const int kTextData2End = 0x773FF;
+const int kPointersDictionaries = 0x74703;
+const int kCharactersWidth = 0x74ADF;
+
+const string DICTIONARYTOKEN = "D";
+const uint8_t DICTOFF = 0x88;
+const string BANKToken = "BANK";
+const uint8_t BANKID = 0x80;
+
+constexpr uint8_t kBlockTerminator = 0x80;
+
+static std::vector<uint8_t> ParseMessageToData(string str);
+
+static ParsedElement FindMatchingElement(string str);
+
+constexpr uint8_t kScrollVertical = 0x73;
+constexpr uint8_t kLine1 = 0x74;
+constexpr uint8_t kLine2 = 0x75;
+constexpr uint8_t kLine3 = 0x76;
+
+static const TextElement TextCommands[] = {
+    TextElement(0x6B, "W", true, "Window border"),
+    TextElement(0x6D, "P", true, "Window position"),
+    TextElement(0x6E, "SPD", true, "Scroll speed"),
+    TextElement(0x7A, "S", true, "Text draw speed"),
+    TextElement(0x77, "C", true, "Text color"),
+    TextElement(0x6A, "L", false, "Player name"),
+    TextElement(0x74, "1", false, "Line 1"),
+    TextElement(0x75, "2", false, "Line 2"),
+    TextElement(0x76, "3", false, "Line 3"),
+    TextElement(0x7E, "K", false, "Wait for key"),
+    TextElement(0x73, "V", false, "Scroll text"),
+    TextElement(0x78, "WT", true, "Delay X"),
+    TextElement(0x6C, "N", true, "BCD number"),
+    TextElement(0x79, "SFX", true, "Sound effect"),
+    TextElement(0x71, "CH3", false, "Choose 3"),
+    TextElement(0x72, "CH2", false, "Choose 2 high"),
+    TextElement(0x6F, "CH2L", false, "Choose 2 low"),
+    TextElement(0x68, "CH2I", false, "Choose 2 indented"),
+    TextElement(0x69, "CHI", false, "Choose item"),
+    TextElement(0x67, "IMG", false, "Next attract image"),
+    TextElement(0x80, BANKToken, false, "Bank marker (automatic)"),
+    TextElement(0x70, "NONO", false, "Crash"),
+};
+
+static std::vector<TextElement> SpecialChars = {
+    TextElement(0x43, "...", false, "Ellipsis …"),
+    TextElement(0x4D, "UP", false, "Arrow ↑"),
+    TextElement(0x4E, "DOWN", false, "Arrow ↓"),
+    TextElement(0x4F, "LEFT", false, "Arrow ←"),
+    TextElement(0x50, "RIGHT", false, "Arrow →"),
+    TextElement(0x5B, "A", false, "Button Ⓐ"),
+    TextElement(0x5C, "B", false, "Button Ⓑ"),
+    TextElement(0x5D, "X", false, "Button ⓧ"),
+    TextElement(0x5E, "Y", false, "Button ⓨ"),
+    TextElement(0x52, "HP1L", false, "1 HP left"),
+    TextElement(0x53, "HP1R", false, "1 HP right"),
+    TextElement(0x54, "HP2L", false, "2 HP left"),
+    TextElement(0x55, "HP3L", false, "3 HP left"),
+    TextElement(0x56, "HP3R", false, "3 HP right"),
+    TextElement(0x57, "HP4L", false, "4 HP left"),
+    TextElement(0x58, "HP4R", false, "4 HP right"),
+    TextElement(0x47, "HY0", false, "Hieroglyph ☥"),
+    TextElement(0x48, "HY1", false, "Hieroglyph 𓈗"),
+    TextElement(0x49, "HY2", false, "Hieroglyph Ƨ"),
+    TextElement(0x4A, "LFL", false, "Link face left"),
+    TextElement(0x4B, "LFR", false, "Link face right"),
+};
+
+static const std::unordered_map<uint8_t, wchar_t> CharEncoder = {
+    {0x00, 'A'},
+    {0x01, 'B'},
+    {0x02, 'C'},
+    {0x03, 'D'},
+    {0x04, 'E'},
+    {0x05, 'F'},
+    {0x06, 'G'},
+    {0x07, 'H'},
+    {0x08, 'I'},
+    {0x09, 'J'},
+    {0x0A, 'K'},
+    {0x0B, 'L'},
+    {0x0C, 'M'},
+    {0x0D, 'N'},
+    {0x0E, 'O'},
+    {0x0F, 'P'},
+    {0x10, 'Q'},
+    {0x11, 'R'},
+    {0x12, 'S'},
+    {0x13, 'T'},
+    {0x14, 'U'},
+    {0x15, 'V'},
+    {0x16, 'W'},
+    {0x17, 'X'},
+    {0x18, 'Y'},
+    {0x19, 'Z'},
+    {0x1A, 'a'},
+    {0x1B, 'b'},
+    {0x1C, 'c'},
+    {0x1D, 'd'},
+    {0x1E, 'e'},
+    {0x1F, 'f'},
+    {0x20, 'g'},
+    {0x21, 'h'},
+    {0x22, 'i'},
+    {0x23, 'j'},
+    {0x24, 'k'},
+    {0x25, 'l'},
+    {0x26, 'm'},
+    {0x27, 'n'},
+    {0x28, 'o'},
+    {0x29, 'p'},
+    {0x2A, 'q'},
+    {0x2B, 'r'},
+    {0x2C, 's'},
+    {0x2D, 't'},
+    {0x2E, 'u'},
+    {0x2F, 'v'},
+    {0x30, 'w'},
+    {0x31, 'x'},
+    {0x32, 'y'},
+    {0x33, 'z'},
+    {0x34, '0'},
+    {0x35, '1'},
+    {0x36, '2'},
+    {0x37, '3'},
+    {0x38, '4'},
+    {0x39, '5'},
+    {0x3A, '6'},
+    {0x3B, '7'},
+    {0x3C, '8'},
+    {0x3D, '9'},
+    {0x3E, '!'},
+    {0x3F, '?'},
+    {0x40, '-'},
+    {0x41, '.'},
+    {0x42, ','},
+    {0x44, '>'},
+    {0x45, '('},
+    {0x46, ')'},
+    {0x4C, '"'},
+    {0x51, '\''},
+    {0x59, ' '},
+    {0x5A, '<'},
+    // {0x5F, '¡'}, {0x60, '¡'}, {0x61, '¡'},  {0x62, ' '}, {0x63, ' '}, {0x64,
+    // ' '},
+    {0x65, ' '},
+    {0x66, '_'},
+};
+
+static TextElement DictionaryElement =
+    TextElement(0x80, DICTIONARYTOKEN, true, "Dictionary");
+
+class MessageEditor : public Editor, public SharedRom {
+ public:
+  struct DictionaryEntry {
+    uint8_t ID;
+    std::string Contents;
+    std::vector<uint8_t> Data;
+    int Length;
+    std::string Token;
+
+    DictionaryEntry() = default;
+    DictionaryEntry(uint8_t i, std::string s)
+        : Contents(s), ID(i), Length(s.length()) {
+      Token = absl::StrFormat("[%s:%00X]", DICTIONARYTOKEN, ID);
+      Data = ParseMessageToData(Contents);
+    }
+
+    bool ContainedInString(std::string s) {
+      return s.find(Contents) != std::string::npos;
+    }
+
+    std::string ReplaceInstancesOfIn(std::string s) {
+      std::string replacedString = s;
+      size_t pos = replacedString.find(Contents);
+      while (pos != std::string::npos) {
+        replacedString.replace(pos, Contents.length(), Token);
+        pos = replacedString.find(Contents, pos + Token.length());
+      }
+      return replacedString;
+    }
+  };
+
+  MessageEditor() { type_ = EditorType::kMessage; }
+
+  absl::Status Update() override;
+  void DrawMessageList();
+  void DrawCurrentMessage();
+  void DrawTextCommands();
+
+  absl::Status Initialize();
+  void ReadAllTextData();
+  void BuildDictionaryEntries();
+
+  absl::Status Cut() override;
+  absl::Status Copy() override;
+  absl::Status Paste() override;
+  absl::Status Undo() override;
+  absl::Status Redo() override {
+    return absl::UnimplementedError("Redo not implemented");
+  }
+  absl::Status Find() override {
+    return absl::UnimplementedError("Find not implemented");
+  }
+  absl::Status Save();
+  void Delete();
+  void SelectAll();
+  // void RegisterTests(ImGuiTestEngine* e) override;
+
+  TextElement FindMatchingCommand(uint8_t byte);
+  TextElement FindMatchingSpecial(uint8_t value);
+  string ParseTextDataByte(uint8_t value);
+  DictionaryEntry GetDictionaryFromID(uint8_t value);
+
+  static uint8_t FindDictionaryEntry(uint8_t value);
+  static uint8_t FindMatchingCharacter(char value);
+  void DrawTileToPreview(int x, int y, int srcx, int srcy, int pal,
+                         int sizex = 1, int sizey = 1);
+  void DrawCharacterToPreview(char c);
+  void DrawCharacterToPreview(const std::vector<uint8_t>& text);
+
+  void DrawStringToPreview(string str);
+  void DrawMessagePreview();
+  std::string DisplayTextOverflowError(int pos, bool bank);
+
+  void InsertCommandButton_Click_1();
+  void InsertSpecialButton_Click();
+  void InsertSelectedText(string str);
+
+  static const std::vector<DictionaryEntry> AllDicts;
+
+  uint8_t width_array[100];
+  string romname = "";
+
+  int text_line = 0;
+  int text_pos = 0;
+  int shown_lines = 0;
+  int selected_tile = 0;
+
+  bool skip_next = false;
+  bool from_form = false;
+
+  std::vector<MessageData> ListOfTexts;
+  std::vector<MessageData> DisplayedMessages;
+  std::vector<std::string> ParsedMessages;
+
+  MessageData CurrentMessage;
+
+ private:
+  static const TextElement DictionaryElement;
+
+  bool data_loaded_ = false;
+  int current_message_id_ = 0;
+
+  std::string search_text_ = "";
+
+  gui::Canvas font_gfx_canvas_{"##FontGfxCanvas", ImVec2(128, 128)};
+  gui::Canvas current_font_gfx16_canvas_{"##CurrentMessageGfx",
+                                         ImVec2(172, 4096)};
+
+  gfx::Bitmap font_gfx_bitmap_;
+  gfx::Bitmap current_font_gfx16_bitmap_;
+
+  Bytes font_gfx16_data;
+  Bytes current_font_gfx16_data_;
+
+  gfx::SnesPalette font_preview_colors_;
+
+  struct TextBox {
+    std::string text;
+    std::string buffer;
+    int cursor_pos = 0;
+    int selection_start = 0;
+    int selection_end = 0;
+    int selection_length = 0;
+    bool has_selection = false;
+    bool has_focus = false;
+    bool changed = false;
+    bool can_undo = false;
+
+    void Undo() {
+      text = buffer;
+      cursor_pos = selection_start;
+      has_selection = false;
+    }
+    void clearUndo() { can_undo = false; }
+    void Copy() { ImGui::SetClipboardText(text.c_str()); }
+    void Cut() {
+      Copy();
+      text.erase(selection_start, selection_end - selection_start);
+      cursor_pos = selection_start;
+      has_selection = false;
+      changed = true;
+    }
+    void Paste() {
+      text.erase(selection_start, selection_end - selection_start);
+      text.insert(selection_start, ImGui::GetClipboardText());
+      std::string str = ImGui::GetClipboardText();
+      cursor_pos = selection_start + str.size();
+      has_selection = false;
+      changed = true;
+    }
+    void clear() {
+      text.clear();
+      buffer.clear();
+      cursor_pos = 0;
+      selection_start = 0;
+      selection_end = 0;
+      selection_length = 0;
+      has_selection = false;
+      has_focus = false;
+      changed = false;
+      can_undo = false;
+    }
+    void SelectAll() {
+      selection_start = 0;
+      selection_end = text.size();
+      selection_length = text.size();
+      has_selection = true;
+    }
+    void Focus() { has_focus = true; }
+  };
+
+  TextBox message_text_box_;
+};
+
+static std::vector<MessageEditor::DictionaryEntry> AllDictionaries;
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_MESSAGE_EDITOR_H

src/app/editor/message/message_editor_test.cc

@@ -0,0 +1,7 @@
+#include "message_editor.h"
+
+namespace yaze {
+namespace app {
+namespace editor {}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/music/music_editor.cc

@@ -0,0 +1,222 @@
+#include "music_editor.h"
+
+#include "imgui/imgui.h"
+
+#include "absl/strings/str_format.h"
+#include "app/editor/code/assembly_editor.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+absl::Status MusicEditor::Update() {
+  if (ImGui::BeginTable("MusicEditorColumns", 2, music_editor_flags_,
+                        ImVec2(0, 0))) {
+    ImGui::TableSetupColumn("Assembly");
+    ImGui::TableSetupColumn("Composition");
+    ImGui::TableHeadersRow();
+    ImGui::TableNextRow();
+
+    ImGui::TableNextColumn();
+    assembly_editor_.InlineUpdate();
+
+    ImGui::TableNextColumn();
+    DrawToolset();
+    DrawChannels();
+    DrawPianoRoll();
+
+    ImGui::EndTable();
+  }
+
+  return absl::OkStatus();
+}
+
+void MusicEditor::DrawChannels() {
+  if (ImGui::BeginTabBar("MyTabBar", ImGuiTabBarFlags_None)) {
+    for (int i = 1; i <= 8; ++i) {
+      if (ImGui::BeginTabItem(absl::StrFormat("%d", i).data())) {
+        DrawPianoStaff();
+        ImGui::EndTabItem();
+      }
+    }
+    ImGui::EndTabBar();
+  }
+}
+
+static const int NUM_KEYS = 25;
+static bool keys[NUM_KEYS];
+
+void MusicEditor::DrawPianoStaff() {
+  if (ImGuiID child_id = ImGui::GetID((void*)(intptr_t)9);
+      ImGui::BeginChild(child_id, ImVec2(0, 170), false)) {
+    const int NUM_LINES = 5;
+    const int LINE_THICKNESS = 2;
+    const int LINE_SPACING = 40;
+
+    // Get the draw list for the current window
+    ImDrawList* draw_list = ImGui::GetWindowDrawList();
+
+    // Draw the staff lines
+    ImVec2 canvas_p0 =
+        ImVec2(ImGui::GetCursorScreenPos().x, ImGui::GetCursorScreenPos().y);
+    ImVec2 canvas_p1 = ImVec2(canvas_p0.x + ImGui::GetContentRegionAvail().x,
+                              canvas_p0.y + ImGui::GetContentRegionAvail().y);
+    draw_list->AddRectFilled(canvas_p0, canvas_p1, IM_COL32(32, 32, 32, 255));
+    for (int i = 0; i < NUM_LINES; i++) {
+      auto line_start = ImVec2(canvas_p0.x, canvas_p0.y + i * LINE_SPACING);
+      auto line_end = ImVec2(canvas_p1.x + ImGui::GetContentRegionAvail().x,
+                             canvas_p0.y + i * LINE_SPACING);
+      draw_list->AddLine(line_start, line_end, IM_COL32(200, 200, 200, 255),
+                         LINE_THICKNESS);
+    }
+
+    // Draw the ledger lines
+    const int NUM_LEDGER_LINES = 3;
+    for (int i = -NUM_LEDGER_LINES; i <= NUM_LINES + NUM_LEDGER_LINES; i++) {
+      if (i % 2 == 0) continue;  // skip every other line
+      auto line_start = ImVec2(canvas_p0.x, canvas_p0.y + i * LINE_SPACING / 2);
+      auto line_end = ImVec2(canvas_p1.x + ImGui::GetContentRegionAvail().x,
+                             canvas_p0.y + i * LINE_SPACING / 2);
+      draw_list->AddLine(line_start, line_end, IM_COL32(150, 150, 150, 255),
+                         LINE_THICKNESS);
+    }
+  }
+  ImGui::EndChild();
+}
+
+void MusicEditor::DrawPianoRoll() {
+  // Render the piano roll
+  float key_width = ImGui::GetContentRegionAvail().x / NUM_KEYS;
+  float white_key_height = ImGui::GetContentRegionAvail().y * 0.8f;
+  float black_key_height = ImGui::GetContentRegionAvail().y * 0.5f;
+  ImGui::Text("Piano Roll");
+  ImGui::Separator();
+  ImDrawList* draw_list = ImGui::GetWindowDrawList();
+
+  // Draw the staff lines
+  ImVec2 canvas_p0 =
+      ImVec2(ImGui::GetCursorScreenPos().x, ImGui::GetCursorScreenPos().y);
+  ImVec2 canvas_p1 = ImVec2(canvas_p0.x + ImGui::GetContentRegionAvail().x,
+                            canvas_p0.y + ImGui::GetContentRegionAvail().y);
+  draw_list->AddRectFilled(canvas_p0, canvas_p1, IM_COL32(200, 200, 200, 255));
+
+  ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(4.f, 0.f));
+  ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, 0.f);
+  for (int i = 0; i < NUM_KEYS; i++) {
+    // Calculate the position and size of the key
+    ImVec2 key_pos = ImVec2(i * key_width, 0.0f);
+    ImVec2 key_size;
+    ImVec4 key_color;
+    ImVec4 text_color;
+    if (i % 12 == 1 || i % 12 == 3 || i % 12 == 6 || i % 12 == 8 ||
+        i % 12 == 10) {
+      // This is a black key
+      key_size = ImVec2(key_width * 0.6f, black_key_height);
+      key_color = ImVec4(0, 0, 0, 255);
+      text_color = ImVec4(255, 255, 255, 255);
+    } else {
+      // This is a white key
+      key_size = ImVec2(key_width, white_key_height);
+      key_color = ImVec4(255, 255, 255, 255);
+      text_color = ImVec4(0, 0, 0, 255);
+    }
+
+    ImGui::PushID(i);
+    ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0.f, 0.f));
+    ImGui::PushStyleColor(ImGuiCol_Button, key_color);
+    ImGui::PushStyleColor(ImGuiCol_Text, text_color);
+    if (ImGui::Button(kSongNotes[i].data(), key_size)) {
+      keys[i] ^= 1;
+    }
+    ImGui::PopStyleColor();
+    ImGui::PopStyleColor();
+    ImGui::PopStyleVar();
+
+    ImVec2 button_pos = ImGui::GetItemRectMin();
+    ImVec2 button_size = ImGui::GetItemRectSize();
+    if (keys[i]) {
+      ImVec2 dest;
+      dest.x = button_pos.x + button_size.x;
+      dest.y = button_pos.y + button_size.y;
+      ImGui::GetWindowDrawList()->AddRectFilled(button_pos, dest,
+                                                IM_COL32(200, 200, 255, 200));
+    }
+    ImGui::PopID();
+    ImGui::SameLine();
+  }
+  ImGui::PopStyleVar();
+  ImGui::PopStyleVar();
+}
+
+void MusicEditor::DrawSongToolset() {
+  if (ImGui::BeginTable("DWToolset", 8, toolset_table_flags_, ImVec2(0, 0))) {
+    ImGui::TableSetupColumn("#1");
+    ImGui::TableSetupColumn("#play");
+    ImGui::TableSetupColumn("#rewind");
+    ImGui::TableSetupColumn("#fastforward");
+    ImGui::TableSetupColumn("volumeController");
+
+    ImGui::EndTable();
+  }
+}
+
+void MusicEditor::DrawToolset() {
+  static bool is_playing = false;
+  static int selected_option = 0;
+  static int current_volume = 0;
+  static bool has_loaded_song = false;
+  const int MAX_VOLUME = 100;
+
+  if (is_playing && !has_loaded_song) {
+    has_loaded_song = true;
+  }
+
+  gui::ItemLabel("Select a song to edit: ", gui::ItemLabelFlags::Left);
+  ImGui::Combo("#songs_in_game", &selected_option, kGameSongs, 30);
+
+  gui::ItemLabel("Controls: ", gui::ItemLabelFlags::Left);
+  if (ImGui::BeginTable("SongToolset", 6, toolset_table_flags_, ImVec2(0, 0))) {
+    ImGui::TableSetupColumn("#play");
+    ImGui::TableSetupColumn("#rewind");
+    ImGui::TableSetupColumn("#fastforward");
+    ImGui::TableSetupColumn("#volume");
+    ImGui::TableSetupColumn("#debug");
+
+    ImGui::TableSetupColumn("#slider");
+
+    ImGui::TableNextColumn();
+    if (ImGui::Button(is_playing ? ICON_MD_STOP : ICON_MD_PLAY_ARROW)) {
+      if (is_playing) {
+        has_loaded_song = false;
+      }
+      is_playing = !is_playing;
+    }
+
+    BUTTON_COLUMN(ICON_MD_FAST_REWIND)
+    BUTTON_COLUMN(ICON_MD_FAST_FORWARD)
+    BUTTON_COLUMN(ICON_MD_VOLUME_UP)
+    if (ImGui::Button(ICON_MD_ACCESS_TIME)) {
+      music_tracker_.LoadSongs(*rom());
+    }
+    ImGui::TableNextColumn();
+    ImGui::SliderInt("Volume", &current_volume, 0, 100);
+    ImGui::EndTable();
+  }
+
+  const int SONG_DURATION = 120;  // duration of the song in seconds
+  static int current_time = 0;    // current time in the song in seconds
+
+  // Display the current time in the song
+  gui::ItemLabel("Current Time: ", gui::ItemLabelFlags::Left);
+  ImGui::Text("%d:%02d", current_time / 60, current_time % 60);
+  ImGui::SameLine();
+  // Display the song duration/progress using a progress bar
+  ImGui::ProgressBar((float)current_time / SONG_DURATION);
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/music/music_editor.h

@@ -0,0 +1,104 @@
+#ifndef YAZE_APP_EDITOR_MUSIC_EDITOR_H
+#define YAZE_APP_EDITOR_MUSIC_EDITOR_H
+
+#include "imgui/imgui.h"
+
+#include "absl/strings/str_format.h"
+#include "app/editor/code/assembly_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+#include "app/rom.h"
+#include "app/zelda3/music/tracker.h"
+// #include "snes_spc/demo/demo_util.h"
+// #include "snes_spc/demo/wave_writer.h"
+// #include "snes_spc/snes_spc/spc.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+static const char* kGameSongs[] = {"Title",
+                                   "Light World",
+                                   "Beginning",
+                                   "Rabbit",
+                                   "Forest",
+                                   "Intro",
+                                   "Town",
+                                   "Warp",
+                                   "Dark world",
+                                   "Master sword",
+                                   "File select",
+                                   "Soldier",
+                                   "Mountain",
+                                   "Shop",
+                                   "Fanfare",
+                                   "Castle",
+                                   "Palace (Pendant)",
+                                   "Cave (Same as Secret Way)",
+                                   "Clear (Dungeon end)",
+                                   "Church",
+                                   "Boss",
+                                   "Dungeon (Crystal)",
+                                   "Psychic",
+                                   "Secret Way (Same as Cave)",
+                                   "Rescue",
+                                   "Crystal",
+                                   "Fountain",
+                                   "Pyramid",
+                                   "Kill Agahnim",
+                                   "Ganon Room",
+                                   "Last Boss"};
+
+static constexpr absl::string_view kSongNotes[] = {
+    "C",  "C#", "D",  "D#", "E", "F",  "F#", "G",  "G#", "A",  "A#", "B", "C",
+    "C#", "D",  "D#", "E",  "F", "F#", "G",  "G#", "A",  "A#", "B",  "C"};
+
+/**
+ * @class MusicEditor
+ * @brief A class for editing music data in a Rom.
+ */
+class MusicEditor : public SharedRom, public Editor {
+ public:
+  MusicEditor() { type_ = EditorType::kMusic; }
+
+  absl::Status Update() override;
+
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+ private:
+  void DrawChannels();
+  void DrawPianoStaff();
+  void DrawPianoRoll();
+  void DrawSongToolset();
+  void DrawToolset();
+
+  zelda3::music::Tracker music_tracker_;
+
+  // Mix_Music* current_song_ = NULL;
+
+  AssemblyEditor assembly_editor_;
+  ImGuiTableFlags toolset_table_flags_ = ImGuiTableFlags_SizingFixedFit;
+  ImGuiTableFlags music_editor_flags_ = ImGuiTableFlags_SizingFixedFit |
+                                        ImGuiTableFlags_Resizable |
+                                        ImGuiTableFlags_Reorderable;
+
+  ImGuiTableFlags channel_table_flags_ =
+      ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable |
+      ImGuiTableFlags_Hideable | ImGuiTableFlags_Sortable |
+      ImGuiTableFlags_SortMulti | ImGuiTableFlags_RowBg |
+      ImGuiTableFlags_BordersOuter | ImGuiTableFlags_BordersV |
+      ImGuiTableFlags_NoBordersInBody | ImGuiTableFlags_ScrollY;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/editor/overworld/entity.cc

@@ -0,0 +1,490 @@
+#include "app/editor/overworld/entity.h"
+
+#include "app/gui/input.h"
+#include "app/gui/style.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginChild;
+using ImGui::BeginGroup;
+using ImGui::Button;
+using ImGui::Checkbox;
+using ImGui::EndChild;
+using ImGui::SameLine;
+using ImGui::Selectable;
+using ImGui::Text;
+
+bool IsMouseHoveringOverEntity(const zelda3::OverworldEntity &entity,
+                               ImVec2 canvas_p0, ImVec2 scrolling) {
+  // Get the mouse position relative to the canvas
+  const ImGuiIO &io = ImGui::GetIO();
+  const ImVec2 origin(canvas_p0.x + scrolling.x, canvas_p0.y + scrolling.y);
+  const ImVec2 mouse_pos(io.MousePos.x - origin.x, io.MousePos.y - origin.y);
+
+  // Check if the mouse is hovering over the entity
+  if (mouse_pos.x >= entity.x_ && mouse_pos.x <= entity.x_ + 16 &&
+      mouse_pos.y >= entity.y_ && mouse_pos.y <= entity.y_ + 16) {
+    return true;
+  }
+  return false;
+}
+
+void MoveEntityOnGrid(zelda3::OverworldEntity *entity, ImVec2 canvas_p0,
+                      ImVec2 scrolling, bool free_movement) {
+  // Get the mouse position relative to the canvas
+  const ImGuiIO &io = ImGui::GetIO();
+  const ImVec2 origin(canvas_p0.x + scrolling.x, canvas_p0.y + scrolling.y);
+  const ImVec2 mouse_pos(io.MousePos.x - origin.x, io.MousePos.y - origin.y);
+
+  // Calculate the new position on the 16x16 grid
+  int new_x = static_cast<int>(mouse_pos.x) / 16 * 16;
+  int new_y = static_cast<int>(mouse_pos.y) / 16 * 16;
+  if (free_movement) {
+    new_x = static_cast<int>(mouse_pos.x) / 8 * 8;
+    new_y = static_cast<int>(mouse_pos.y) / 8 * 8;
+  }
+
+  // Update the entity position
+  entity->set_x(new_x);
+  entity->set_y(new_y);
+}
+
+void HandleEntityDragging(zelda3::OverworldEntity *entity, ImVec2 canvas_p0,
+                          ImVec2 scrolling, bool &is_dragging_entity,
+                          zelda3::OverworldEntity *&dragged_entity,
+                          zelda3::OverworldEntity *&current_entity,
+                          bool free_movement) {
+  std::string entity_type = "Entity";
+  if (entity->type_ == zelda3::OverworldEntity::EntityType::kExit) {
+    entity_type = "Exit";
+  } else if (entity->type_ == zelda3::OverworldEntity::EntityType::kEntrance) {
+    entity_type = "Entrance";
+  } else if (entity->type_ == zelda3::OverworldEntity::EntityType::kSprite) {
+    entity_type = "Sprite";
+  } else if (entity->type_ == zelda3::OverworldEntity::EntityType::kItem) {
+    entity_type = "Item";
+  }
+  const auto is_hovering =
+      IsMouseHoveringOverEntity(*entity, canvas_p0, scrolling);
+
+  const auto drag_or_clicked = ImGui::IsMouseDragging(ImGuiMouseButton_Left) ||
+                               ImGui::IsMouseClicked(ImGuiMouseButton_Left);
+
+  if (is_hovering && drag_or_clicked && !is_dragging_entity) {
+    dragged_entity = entity;
+    is_dragging_entity = true;
+  } else if (is_hovering && ImGui::IsMouseClicked(ImGuiMouseButton_Right)) {
+    current_entity = entity;
+    ImGui::OpenPopup(absl::StrFormat("%s editor", entity_type.c_str()).c_str());
+  } else if (is_dragging_entity && dragged_entity == entity &&
+             ImGui::IsMouseReleased(ImGuiMouseButton_Left)) {
+    MoveEntityOnGrid(dragged_entity, canvas_p0, scrolling, free_movement);
+    entity->UpdateMapProperties(entity->map_id_);
+    is_dragging_entity = false;
+    dragged_entity = nullptr;
+  } else if (is_dragging_entity && dragged_entity == entity) {
+    if (ImGui::BeginDragDropSource()) {
+      ImGui::SetDragDropPayload("ENTITY_PAYLOAD", &entity,
+                                sizeof(zelda3::OverworldEntity));
+      Text("Moving %s ID: %s", entity_type.c_str(),
+           core::UppercaseHexByte(entity->entity_id_).c_str());
+      ImGui::EndDragDropSource();
+    }
+    MoveEntityOnGrid(dragged_entity, canvas_p0, scrolling, free_movement);
+    entity->x_ = dragged_entity->x_;
+    entity->y_ = dragged_entity->y_;
+    entity->UpdateMapProperties(entity->map_id_);
+  }
+}
+
+bool DrawEntranceInserterPopup() {
+  bool set_done = false;
+  if (set_done) {
+    set_done = false;
+  }
+  if (ImGui::BeginPopup("Entrance Inserter")) {
+    static int entrance_id = 0;
+    gui::InputHex("Entrance ID", &entrance_id);
+
+    if (Button(ICON_MD_DONE)) {
+      set_done = true;
+      ImGui::CloseCurrentPopup();
+    }
+
+    SameLine();
+    if (Button(ICON_MD_CANCEL)) {
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+  return set_done;
+}
+
+// TODO: Implement deleting OverworldEntrance objects, currently only hides them
+bool DrawOverworldEntrancePopup(
+    zelda3::overworld::OverworldEntrance &entrance) {
+  static bool set_done = false;
+  if (set_done) {
+    set_done = false;
+  }
+  if (ImGui::BeginPopupModal("Entrance editor", NULL,
+                             ImGuiWindowFlags_AlwaysAutoResize)) {
+    gui::InputHex("Map ID", &entrance.map_id_);
+    gui::InputHexByte("Entrance ID", &entrance.entrance_id_,
+                      kInputFieldSize + 20);
+    gui::InputHex("X", &entrance.x_);
+    gui::InputHex("Y", &entrance.y_);
+
+    if (Button(ICON_MD_DONE)) {
+      ImGui::CloseCurrentPopup();
+    }
+    SameLine();
+    if (Button(ICON_MD_CANCEL)) {
+      set_done = true;
+      ImGui::CloseCurrentPopup();
+    }
+    SameLine();
+    if (Button(ICON_MD_DELETE)) {
+      entrance.deleted = true;
+      ImGui::CloseCurrentPopup();
+    }
+    ImGui::EndPopup();
+  }
+  return set_done;
+}
+
+// TODO: Implement deleting OverworldExit objects
+void DrawExitInserterPopup() {
+  if (ImGui::BeginPopup("Exit Inserter")) {
+    static int exit_id = 0;
+    gui::InputHex("Exit ID", &exit_id);
+
+    if (Button(ICON_MD_DONE)) {
+      ImGui::CloseCurrentPopup();
+    }
+
+    SameLine();
+    if (Button(ICON_MD_CANCEL)) {
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+}
+
+bool DrawExitEditorPopup(zelda3::overworld::OverworldExit &exit) {
+  static bool set_done = false;
+  if (set_done) {
+    set_done = false;
+  }
+  if (ImGui::BeginPopupModal("Exit editor", NULL,
+                             ImGuiWindowFlags_AlwaysAutoResize)) {
+    // Normal door: None = 0, Wooden = 1, Bombable = 2
+    static int doorType = exit.door_type_1_;
+    // Fancy door: None = 0, Sanctuary = 1, Palace = 2
+    static int fancyDoorType = exit.door_type_2_;
+
+    static int xPos = 0;
+    static int yPos = 0;
+
+    // Special overworld exit properties
+    static int centerY = 0;
+    static int centerX = 0;
+    static int unk1 = 0;
+    static int unk2 = 0;
+    static int linkPosture = 0;
+    static int spriteGFX = 0;
+    static int bgGFX = 0;
+    static int palette = 0;
+    static int sprPal = 0;
+    static int top = 0;
+    static int bottom = 0;
+    static int left = 0;
+    static int right = 0;
+    static int leftEdgeOfMap = 0;
+
+    gui::InputHexWord("Room", &exit.room_id_);
+    SameLine();
+    gui::InputHex("Entity ID", &exit.entity_id_, 4);
+    gui::InputHex("Map", &exit.map_id_);
+    SameLine();
+    Checkbox("Automatic", &exit.is_automatic_);
+
+    gui::InputHex("X Positon", &exit.x_);
+    SameLine();
+    gui::InputHex("Y Position", &exit.y_);
+
+    gui::InputHexByte("X Camera", &exit.x_camera_);
+    SameLine();
+    gui::InputHexByte("Y Camera", &exit.y_camera_);
+
+    gui::InputHexWord("X Scroll", &exit.x_scroll_);
+    SameLine();
+    gui::InputHexWord("Y Scroll", &exit.y_scroll_);
+
+    ImGui::Separator();
+
+    static bool show_properties = false;
+    Checkbox("Show properties", &show_properties);
+    if (show_properties) {
+      Text("Deleted? %s", exit.deleted_ ? "true" : "false");
+      Text("Hole? %s", exit.is_hole_ ? "true" : "false");
+      Text("Large Map? %s", exit.large_map_ ? "true" : "false");
+    }
+
+    gui::TextWithSeparators("Unimplemented below");
+
+    ImGui::RadioButton("None", &doorType, 0);
+    SameLine();
+    ImGui::RadioButton("Wooden", &doorType, 1);
+    SameLine();
+    ImGui::RadioButton("Bombable", &doorType, 2);
+    // If door type is not None, input positions
+    if (doorType != 0) {
+      gui::InputHex("Door X pos", &xPos);
+      gui::InputHex("Door Y pos", &yPos);
+    }
+
+    ImGui::RadioButton("None##Fancy", &fancyDoorType, 0);
+    SameLine();
+    ImGui::RadioButton("Sanctuary", &fancyDoorType, 1);
+    SameLine();
+    ImGui::RadioButton("Palace", &fancyDoorType, 2);
+    // If fancy door type is not None, input positions
+    if (fancyDoorType != 0) {
+      // Placeholder for fancy door's X position
+      gui::InputHex("Fancy Door X pos", &xPos);
+      // Placeholder for fancy door's Y position
+      gui::InputHex("Fancy Door Y pos", &yPos);
+    }
+
+    static bool special_exit = false;
+    Checkbox("Special exit", &special_exit);
+    if (special_exit) {
+      gui::InputHex("Center X", &centerX);
+
+      gui::InputHex("Center Y", &centerY);
+      gui::InputHex("Unk1", &unk1);
+      gui::InputHex("Unk2", &unk2);
+
+      gui::InputHex("Link's posture", &linkPosture);
+      gui::InputHex("Sprite GFX", &spriteGFX);
+      gui::InputHex("BG GFX", &bgGFX);
+      gui::InputHex("Palette", &palette);
+      gui::InputHex("Spr Pal", &sprPal);
+
+      gui::InputHex("Top", &top);
+      gui::InputHex("Bottom", &bottom);
+      gui::InputHex("Left", &left);
+      gui::InputHex("Right", &right);
+
+      gui::InputHex("Left edge of map", &leftEdgeOfMap);
+    }
+
+    if (Button(ICON_MD_DONE)) {
+      ImGui::CloseCurrentPopup();
+    }
+
+    SameLine();
+
+    if (Button(ICON_MD_CANCEL)) {
+      set_done = true;
+      ImGui::CloseCurrentPopup();
+    }
+
+    SameLine();
+    if (Button(ICON_MD_DELETE)) {
+      exit.deleted_ = true;
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+
+  return set_done;
+}
+
+void DrawItemInsertPopup() {
+  // Contents of the Context Menu
+  if (ImGui::BeginPopup("Item Inserter")) {
+    static int new_item_id = 0;
+    Text("Add Item");
+    BeginChild("ScrollRegion", ImVec2(150, 150), true,
+               ImGuiWindowFlags_AlwaysVerticalScrollbar);
+    for (int i = 0; i < zelda3::overworld::kSecretItemNames.size(); i++) {
+      if (Selectable(zelda3::overworld::kSecretItemNames[i].c_str(),
+                     i == new_item_id)) {
+        new_item_id = i;
+      }
+    }
+    EndChild();
+
+    if (Button(ICON_MD_DONE)) {
+      // Add the new item to the overworld
+      new_item_id = 0;
+      ImGui::CloseCurrentPopup();
+    }
+    SameLine();
+
+    if (Button(ICON_MD_CANCEL)) {
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+}
+
+// TODO: Implement deleting OverworldItem objects, currently only hides them
+bool DrawItemEditorPopup(zelda3::overworld::OverworldItem &item) {
+  static bool set_done = false;
+  if (set_done) {
+    set_done = false;
+  }
+  if (ImGui::BeginPopupModal("Item editor", NULL,
+                             ImGuiWindowFlags_AlwaysAutoResize)) {
+    BeginChild("ScrollRegion", ImVec2(150, 150), true,
+               ImGuiWindowFlags_AlwaysVerticalScrollbar);
+    ImGui::BeginGroup();
+    for (int i = 0; i < zelda3::overworld::kSecretItemNames.size(); i++) {
+      if (Selectable(zelda3::overworld::kSecretItemNames[i].c_str(),
+                     item.id == i)) {
+        item.id = i;
+      }
+    }
+    ImGui::EndGroup();
+    EndChild();
+
+    if (Button(ICON_MD_DONE)) ImGui::CloseCurrentPopup();
+    SameLine();
+    if (Button(ICON_MD_CLOSE)) {
+      set_done = true;
+      ImGui::CloseCurrentPopup();
+    }
+    SameLine();
+    if (Button(ICON_MD_DELETE)) {
+      item.deleted = true;
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+  return set_done;
+}
+
+const ImGuiTableSortSpecs *SpriteItem::s_current_sort_specs = nullptr;
+
+void DrawSpriteTable(std::function<void(int)> onSpriteSelect) {
+  static ImGuiTextFilter filter;
+  static int selected_id = 0;
+  static std::vector<SpriteItem> items;
+
+  // Initialize items if empty
+  if (items.empty()) {
+    for (int i = 0; i < 256; ++i) {
+      items.push_back(SpriteItem{i, core::kSpriteDefaultNames[i].data()});
+    }
+  }
+
+  filter.Draw("Filter", 180);
+
+  if (ImGui::BeginTable("##sprites", 2,
+                        ImGuiTableFlags_Sortable | ImGuiTableFlags_Resizable)) {
+    ImGui::TableSetupColumn("ID", ImGuiTableColumnFlags_DefaultSort, 0.0f,
+                            MyItemColumnID_ID);
+    ImGui::TableSetupColumn("Name", 0, 0.0f, MyItemColumnID_Name);
+    ImGui::TableHeadersRow();
+
+    // Handle sorting
+    if (ImGuiTableSortSpecs *sort_specs = ImGui::TableGetSortSpecs()) {
+      if (sort_specs->SpecsDirty) {
+        SpriteItem::SortWithSortSpecs(sort_specs, items);
+        sort_specs->SpecsDirty = false;
+      }
+    }
+
+    // Display filtered and sorted items
+    for (const auto &item : items) {
+      if (filter.PassFilter(item.name)) {
+        ImGui::TableNextRow();
+        ImGui::TableSetColumnIndex(0);
+        Text("%d", item.id);
+        ImGui::TableSetColumnIndex(1);
+
+        if (Selectable(item.name, selected_id == item.id,
+                       ImGuiSelectableFlags_SpanAllColumns)) {
+          selected_id = item.id;
+          onSpriteSelect(item.id);
+        }
+      }
+    }
+    ImGui::EndTable();
+  }
+}
+
+// TODO: Implement deleting OverworldSprite objects
+void DrawSpriteInserterPopup() {
+  if (ImGui::BeginPopup("Sprite Inserter")) {
+    static int new_sprite_id = 0;
+    Text("Add Sprite");
+    BeginChild("ScrollRegion", ImVec2(250, 250), true,
+               ImGuiWindowFlags_AlwaysVerticalScrollbar);
+    DrawSpriteTable([](int selected_id) { new_sprite_id = selected_id; });
+    EndChild();
+
+    if (Button(ICON_MD_DONE)) {
+      // Add the new item to the overworld
+      new_sprite_id = 0;
+      ImGui::CloseCurrentPopup();
+    }
+    SameLine();
+
+    if (Button(ICON_MD_CANCEL)) {
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+}
+
+bool DrawSpriteEditorPopup(zelda3::Sprite &sprite) {
+  static bool set_done = false;
+  if (set_done) {
+    set_done = false;
+  }
+  if (ImGui::BeginPopupModal("Sprite editor", NULL,
+                             ImGuiWindowFlags_AlwaysAutoResize)) {
+    BeginChild("ScrollRegion", ImVec2(350, 350), true,
+               ImGuiWindowFlags_AlwaysVerticalScrollbar);
+    ImGui::BeginGroup();
+    Text("%s", sprite.name().c_str());
+
+    DrawSpriteTable([&sprite](int selected_id) {
+      sprite.set_id(selected_id);
+      sprite.UpdateMapProperties(sprite.map_id());
+    });
+    ImGui::EndGroup();
+    EndChild();
+
+    if (Button(ICON_MD_DONE)) ImGui::CloseCurrentPopup();
+    SameLine();
+    if (Button(ICON_MD_CLOSE)) {
+      set_done = true;
+      ImGui::CloseCurrentPopup();
+    }
+    SameLine();
+    if (Button(ICON_MD_DELETE)) {
+      sprite.set_deleted(true);
+      ImGui::CloseCurrentPopup();
+    }
+
+    ImGui::EndPopup();
+  }
+  return set_done;
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/overworld/entity.h

@@ -0,0 +1,88 @@
+#ifndef YAZE_APP_EDITOR_OVERWORLD_ENTITY_H
+#define YAZE_APP_EDITOR_OVERWORLD_ENTITY_H
+
+#include "imgui/imgui.h"
+
+#include "app/editor/overworld_editor.h"
+#include "app/zelda3/common.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+bool IsMouseHoveringOverEntity(const zelda3::OverworldEntity &entity,
+                               ImVec2 canvas_p0, ImVec2 scrolling);
+
+void MoveEntityOnGrid(zelda3::OverworldEntity *entity, ImVec2 canvas_p0,
+                      ImVec2 scrolling, bool free_movement = false);
+
+void HandleEntityDragging(zelda3::OverworldEntity *entity, ImVec2 canvas_p0,
+                          ImVec2 scrolling, bool &is_dragging_entity,
+                          zelda3::OverworldEntity *&dragged_entity,
+                          zelda3::OverworldEntity *&current_entity,
+                          bool free_movement = false);
+
+bool DrawEntranceInserterPopup();
+bool DrawOverworldEntrancePopup(zelda3::overworld::OverworldEntrance &entrance);
+
+void DrawExitInserterPopup();
+bool DrawExitEditorPopup(zelda3::overworld::OverworldExit &exit);
+
+void DrawItemInsertPopup();
+
+bool DrawItemEditorPopup(zelda3::overworld::OverworldItem &item);
+
+enum MyItemColumnID {
+  MyItemColumnID_ID,
+  MyItemColumnID_Name,
+  MyItemColumnID_Action,
+  MyItemColumnID_Quantity,
+  MyItemColumnID_Description
+};
+
+struct SpriteItem {
+  int id;
+  const char *name;
+  static const ImGuiTableSortSpecs *s_current_sort_specs;
+
+  static void SortWithSortSpecs(ImGuiTableSortSpecs *sort_specs,
+                                std::vector<SpriteItem> &items) {
+    s_current_sort_specs =
+        sort_specs;  // Store for access by the compare function.
+    if (items.size() > 1)
+      std::sort(items.begin(), items.end(), SpriteItem::CompareWithSortSpecs);
+    s_current_sort_specs = nullptr;
+  }
+
+  static bool CompareWithSortSpecs(const SpriteItem &a, const SpriteItem &b) {
+    for (int n = 0; n < s_current_sort_specs->SpecsCount; n++) {
+      const ImGuiTableColumnSortSpecs *sort_spec =
+          &s_current_sort_specs->Specs[n];
+      int delta = 0;
+      switch (sort_spec->ColumnUserID) {
+        case MyItemColumnID_ID:
+          delta = (a.id - b.id);
+          break;
+        case MyItemColumnID_Name:
+          delta = strcmp(a.name + 2, b.name + 2);
+          break;
+      }
+      if (delta != 0)
+        return (sort_spec->SortDirection == ImGuiSortDirection_Ascending)
+                   ? delta < 0
+                   : delta > 0;
+    }
+    return a.id < b.id;  // Fallback
+  }
+};
+
+void DrawSpriteTable(std::function<void(int)> onSpriteSelect);
+void DrawSpriteInserterPopup();
+bool DrawSpriteEditorPopup(zelda3::Sprite &sprite);
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_OVERWORLD_ENTITY_H

src/app/editor/overworld/refresh.cc

@@ -0,0 +1,157 @@
+#include "app/editor/overworld_editor.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+void OverworldEditor::RefreshChildMap(int map_index) {
+  overworld_.mutable_overworld_map(map_index)->LoadAreaGraphics();
+  status_ = overworld_.mutable_overworld_map(map_index)->BuildTileset();
+  PRINT_IF_ERROR(status_);
+  status_ = overworld_.mutable_overworld_map(map_index)->BuildTiles16Gfx(
+      overworld_.tiles16().size());
+  PRINT_IF_ERROR(status_);
+  status_ = overworld_.mutable_overworld_map(map_index)->BuildBitmap(
+      overworld_.GetMapTiles(current_world_));
+  maps_bmp_[map_index].set_data(
+      overworld_.mutable_overworld_map(map_index)->bitmap_data());
+  maps_bmp_[map_index].set_modified(true);
+  PRINT_IF_ERROR(status_);
+}
+
+void OverworldEditor::RefreshOverworldMap() {
+  std::vector<std::future<void>> futures;
+  int indices[4];
+
+  auto refresh_map_async = [this](int map_index) {
+    RefreshChildMap(map_index);
+  };
+
+  int source_map_id = current_map_;
+  bool is_large = overworld_.overworld_map(current_map_)->is_large_map();
+  if (is_large) {
+    source_map_id = current_parent_;
+    // We need to update the map and its siblings if it's a large map
+    for (int i = 1; i < 4; i++) {
+      int sibling_index = overworld_.overworld_map(source_map_id)->parent() + i;
+      if (i >= 2) sibling_index += 6;
+      futures.push_back(
+          std::async(std::launch::async, refresh_map_async, sibling_index));
+      indices[i] = sibling_index;
+    }
+  }
+  indices[0] = source_map_id;
+  futures.push_back(
+      std::async(std::launch::async, refresh_map_async, source_map_id));
+
+  for (auto &each : futures) {
+    each.get();
+  }
+  int n = is_large ? 4 : 1;
+  // We do texture updating on the main thread
+  for (int i = 0; i < n; ++i) {
+    rom()->UpdateBitmap(&maps_bmp_[indices[i]]);
+  }
+}
+
+absl::Status OverworldEditor::RefreshMapPalette() {
+  RETURN_IF_ERROR(
+      overworld_.mutable_overworld_map(current_map_)->LoadPalette());
+  const auto current_map_palette = overworld_.AreaPalette();
+
+  if (overworld_.overworld_map(current_map_)->is_large_map()) {
+    // We need to update the map and its siblings if it's a large map
+    for (int i = 1; i < 4; i++) {
+      int sibling_index = overworld_.overworld_map(current_map_)->parent() + i;
+      if (i >= 2) sibling_index += 6;
+      RETURN_IF_ERROR(
+          overworld_.mutable_overworld_map(sibling_index)->LoadPalette());
+      RETURN_IF_ERROR(
+          maps_bmp_[sibling_index].ApplyPalette(current_map_palette));
+    }
+  }
+
+  RETURN_IF_ERROR(maps_bmp_[current_map_].ApplyPalette(current_map_palette));
+  return absl::OkStatus();
+}
+
+void OverworldEditor::RefreshMapProperties() {
+  auto &current_ow_map = *overworld_.mutable_overworld_map(current_map_);
+  if (current_ow_map.is_large_map()) {
+    // We need to copy the properties from the parent map to the children
+    for (int i = 1; i < 4; i++) {
+      int sibling_index = current_ow_map.parent() + i;
+      if (i >= 2) {
+        sibling_index += 6;
+      }
+      auto &map = *overworld_.mutable_overworld_map(sibling_index);
+      map.set_area_graphics(current_ow_map.area_graphics());
+      map.set_area_palette(current_ow_map.area_palette());
+      map.set_sprite_graphics(game_state_,
+                              current_ow_map.sprite_graphics(game_state_));
+      map.set_sprite_palette(game_state_,
+                             current_ow_map.sprite_palette(game_state_));
+      map.set_message_id(current_ow_map.message_id());
+    }
+  }
+}
+
+absl::Status OverworldEditor::RefreshTile16Blockset() {
+  if (current_blockset_ ==
+      overworld_.overworld_map(current_map_)->area_graphics()) {
+    return absl::OkStatus();
+  }
+  current_blockset_ = overworld_.overworld_map(current_map_)->area_graphics();
+
+  overworld_.set_current_map(current_map_);
+  palette_ = overworld_.AreaPalette();
+  // Create the tile16 blockset image
+  rom()->UpdateBitmap(&tile16_blockset_bmp_);
+  RETURN_IF_ERROR(tile16_blockset_bmp_.ApplyPalette(palette_));
+
+  // Copy the tile16 data into individual tiles.
+  auto tile16_data = overworld_.Tile16Blockset();
+
+  std::vector<std::future<void>> futures;
+  // Loop through the tiles and copy their pixel data into separate vectors
+  for (int i = 0; i < 4096; i++) {
+    futures.push_back(std::async(
+        std::launch::async,
+        [&](int index) {
+          // Create a new vector for the pixel data of the current tile
+          Bytes tile_data(16 * 16, 0x00);  // More efficient initialization
+
+          // Copy the pixel data for the current tile into the vector
+          for (int ty = 0; ty < 16; ty++) {
+            for (int tx = 0; tx < 16; tx++) {
+              int position = tx + (ty * 0x10);
+              uint8_t value =
+                  tile16_data[(index % 8 * 16) + (index / 8 * 16 * 0x80) +
+                              (ty * 0x80) + tx];
+              tile_data[position] = value;
+            }
+          }
+
+          // Add the vector for the current tile to the vector of tile pixel
+          // data
+          tile16_individual_[index].set_data(tile_data);
+        },
+        i));
+  }
+
+  for (auto &future : futures) {
+    future.get();
+  }
+
+  // Render the bitmaps of each tile.
+  for (int id = 0; id < 4096; id++) {
+    RETURN_IF_ERROR(tile16_individual_[id].ApplyPalette(palette_));
+    rom()->UpdateBitmap(&tile16_individual_[id]);
+  }
+
+  return absl::OkStatus();
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/overworld_editor.h

@@ -0,0 +1,300 @@
+#ifndef YAZE_APP_EDITOR_OVERWORLDEDITOR_H
+#define YAZE_APP_EDITOR_OVERWORLDEDITOR_H
+
+#include "imgui/imgui.h"
+
+#include <cmath>
+#include <unordered_map>
+
+#include "absl/container/flat_hash_map.h"
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "absl/strings/str_format.h"
+#include "app/core/common.h"
+#include "app/editor/graphics/gfx_group_editor.h"
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/graphics/tile16_editor.h"
+#include "app/editor/overworld/entity.h"
+#include "app/editor/utils/editor.h"
+#include "app/editor/utils/gfx_context.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/gui/zeml.h"
+#include "app/rom.h"
+#include "app/zelda3/overworld/overworld.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+static constexpr uint k4BPP = 4;
+static constexpr uint kByteSize = 3;
+static constexpr uint kMessageIdSize = 5;
+static constexpr uint kNumSheetsToLoad = 223;
+static constexpr uint kTile8DisplayHeight = 64;
+static constexpr float kInputFieldSize = 30.f;
+
+static constexpr absl::string_view kToolsetColumnNames[] = {
+    "#undoTool",      "#redoTool",  "#separator2", "#zoomOutTool",
+    "#zoomInTool",    "#separator", "#drawTool",   "#history",
+    "#entranceTool",  "#exitTool",  "#itemTool",   "#spriteTool",
+    "#transportTool", "#musicTool", "#separator3", "#tilemapTool",
+    "propertiesTool"};
+
+constexpr ImGuiTableFlags kOWMapFlags =
+    ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable;
+constexpr ImGuiTableFlags kToolsetTableFlags = ImGuiTableFlags_SizingFixedFit;
+constexpr ImGuiTableFlags kOWEditFlags =
+    ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable |
+    ImGuiTableFlags_Hideable | ImGuiTableFlags_BordersOuter |
+    ImGuiTableFlags_BordersV;
+
+constexpr absl::string_view kWorldList =
+    "Light World\0Dark World\0Extra World\0";
+
+constexpr absl::string_view kGamePartComboString = "Part 0\0Part 1\0Part 2\0";
+
+constexpr absl::string_view kTileSelectorTab = "##TileSelectorTabBar";
+constexpr absl::string_view kOWEditTable = "##OWEditTable";
+constexpr absl::string_view kOWMapTable = "#MapSettingsTable";
+
+class EntranceContext {
+ public:
+  absl::Status LoadEntranceTileTypes(Rom& rom) {
+    int offset_low = 0xDB8BF;
+    int offset_high = 0xDB917;
+
+    for (int i = 0; i < 0x2C; i++) {
+      // Load entrance tile types
+      ASSIGN_OR_RETURN(auto value_low, rom.ReadWord(offset_low + i));
+      entrance_tile_types_low_.push_back(value_low);
+      ASSIGN_OR_RETURN(auto value_high, rom.ReadWord(offset_high + i));
+      entrance_tile_types_low_.push_back(value_high);
+    }
+
+    return absl::OkStatus();
+  }
+
+ private:
+  std::vector<uint16_t> entrance_tile_types_low_;
+  std::vector<uint16_t> entrance_tile_types_high_;
+};
+
+/**
+ * @class OverworldEditor
+ * @brief Manipulates the Overworld and OverworldMap data in a Rom.
+ *
+ * The `OverworldEditor` class is responsible for managing the editing and
+ * manipulation of the overworld in a game. The user can drag and drop tiles,
+ * modify OverworldEntrance, OverworldExit, Sprite, and OverworldItem
+ * as well as change the gfx and palettes used in each overworld map.
+ *
+ * The Overworld itself is a series of bitmap images which exist inside each
+ * OverworldMap object. The drawing of the overworld is done using the Canvas
+ * class in conjunction with these underlying Bitmap objects.
+ *
+ * Provides access to the GfxGroupEditor and Tile16Editor through popup windows.
+ *
+ */
+class OverworldEditor : public Editor,
+                        public SharedRom,
+                        public context::GfxContext,
+                        public EntranceContext,
+                        public core::ExperimentFlags {
+ public:
+  OverworldEditor() { type_ = EditorType::kOverworld; }
+
+  void InitializeZeml();
+
+  absl::Status Update() final;
+  absl::Status Undo() { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() { return absl::UnimplementedError("Find Unused Tiles"); }
+
+  auto overworld() { return &overworld_; }
+
+  /**
+   * @brief
+   */
+  int jump_to_tab() { return jump_to_tab_; }
+  int jump_to_tab_ = -1;
+
+  /**
+   * @brief Load the Bitmap objects for each OverworldMap.
+   *
+   * Calls the Overworld class to load the image data and palettes from the Rom,
+   * then renders the area graphics and tile16 blockset Bitmap objects before
+   * assembling the OverworldMap Bitmap objects.
+   */
+  absl::Status LoadGraphics();
+
+ private:
+  absl::Status UpdateFullscreenCanvas();
+
+  absl::Status DrawToolset();
+  void DrawOverworldMapSettings();
+
+  void RefreshChildMap(int i);
+  void RefreshOverworldMap();
+  absl::Status RefreshMapPalette();
+  void RefreshMapProperties();
+  absl::Status RefreshTile16Blockset();
+
+  void DrawOverworldEntrances(ImVec2 canvas_p, ImVec2 scrolling,
+                              bool holes = false);
+  void DrawOverworldExits(ImVec2 zero, ImVec2 scrolling);
+  void DrawOverworldItems();
+  void DrawOverworldSprites();
+
+  void DrawOverworldMaps();
+  void DrawOverworldEdits();
+  void RenderUpdatedMapBitmap(const ImVec2& click_position,
+                              const Bytes& tile_data);
+  void CheckForOverworldEdits();
+  void CheckForSelectRectangle();
+  absl::Status CheckForCurrentMap();
+  void CheckForMousePan();
+
+  /**
+   * @brief Allows the user to make changes to the overworld map.
+   */
+  void DrawOverworldCanvas();
+
+  absl::Status DrawTile16Selector();
+  void DrawTile8Selector();
+  absl::Status DrawAreaGraphics();
+  absl::Status DrawTileSelector();
+
+  absl::Status LoadSpriteGraphics();
+
+  void DrawOverworldProperties();
+
+  absl::Status DrawExperimentalModal();
+
+  absl::Status UpdateUsageStats();
+  void DrawUsageGrid();
+  void CalculateUsageStats();
+
+  absl::Status LoadAnimatedMaps();
+  void DrawDebugWindow();
+
+  auto gfx_group_editor() const { return gfx_group_editor_; }
+
+  enum class EditingMode {
+    DRAW_TILE,
+    ENTRANCES,
+    EXITS,
+    ITEMS,
+    SPRITES,
+    TRANSPORTS,
+    MUSIC,
+    PAN
+  };
+
+  EditingMode current_mode = EditingMode::DRAW_TILE;
+  EditingMode previous_mode = EditingMode::DRAW_TILE;
+
+  int current_world_ = 0;
+  int current_map_ = 0;
+  int current_parent_ = 0;
+  int game_state_ = 1;
+  int current_tile16_ = 0;
+  int selected_tile_ = 0;
+
+  int current_blockset_ = 0;
+
+  int selected_entrance_ = 0;
+  int selected_usage_map_ = 0xFFFF;
+
+  char map_gfx_[3] = "";
+  char map_palette_[3] = "";
+  char spr_gfx_[3] = "";
+  char spr_palette_[3] = "";
+  char message_id_[5] = "";
+  char staticgfx[16];
+
+  uint32_t tilemap_file_offset_high_ = 0;
+  uint32_t tilemap_file_offset_low_ = 0;
+  uint32_t light_maps_to_load_ = 0x51;
+  uint32_t dark_maps_to_load_ = 0x2A;
+  uint32_t sp_maps_to_load_ = 0x07;
+
+  bool opt_enable_grid = true;
+  bool all_gfx_loaded_ = false;
+  bool map_blockset_loaded_ = false;
+  bool selected_tile_loaded_ = false;
+  bool update_selected_tile_ = true;
+  bool is_dragging_entrance_ = false;
+  bool show_tile16_editor_ = false;
+  bool show_gfx_group_editor_ = false;
+  bool overworld_canvas_fullscreen_ = false;
+  bool middle_mouse_dragging_ = false;
+
+  bool is_dragging_entity_ = false;
+  zelda3::OverworldEntity* dragged_entity_;
+  zelda3::OverworldEntity* current_entity_;
+
+  int current_entrance_id_ = 0;
+  zelda3::overworld::OverworldEntrance current_entrance_;
+  int current_exit_id_ = 0;
+  zelda3::overworld::OverworldExit current_exit_;
+  int current_item_id_ = 0;
+  zelda3::overworld::OverworldItem current_item_;
+  int current_sprite_id_ = 0;
+  zelda3::Sprite current_sprite_;
+
+  bool show_experimental = false;
+  std::string ow_tilemap_filename_ = "";
+  std::string tile32_configuration_filename_ = "";
+
+  Bytes selected_tile_data_;
+  std::vector<Bytes> tile16_individual_data_;
+  std::vector<gfx::Bitmap> tile16_individual_;
+
+  std::vector<Bytes> tile8_individual_data_;
+  std::vector<gfx::Bitmap> tile8_individual_;
+
+  Tile16Editor tile16_editor_;
+  GfxGroupEditor gfx_group_editor_;
+  PaletteEditor palette_editor_;
+  zelda3::overworld::Overworld overworld_;
+
+  gui::Canvas ow_map_canvas_{"owMapCanvas", ImVec2(0x200 * 8, 0x200 * 8),
+                             gui::CanvasGridSize::k64x64};
+  gui::Canvas current_gfx_canvas_{"customGfxCanvas",
+                                  ImVec2(0x100 + 1, 0x10 * 0x40 + 1),
+                                  gui::CanvasGridSize::k32x32};
+  gui::Canvas blockset_canvas_{"blocksetCanvas", ImVec2(0x100 + 1, 0x2000 + 1),
+                               gui::CanvasGridSize::k32x32};
+  gui::Canvas graphics_bin_canvas_{
+      "graphicsBinCanvas", ImVec2(0x100 + 1, kNumSheetsToLoad * 0x40 + 1),
+      gui::CanvasGridSize::k16x16};
+  gui::Canvas properties_canvas_;
+
+  gfx::SnesPalette palette_;
+  gfx::Bitmap selected_tile_bmp_;
+  gfx::Bitmap tile16_blockset_bmp_;
+  gfx::Bitmap current_gfx_bmp_;
+  gfx::Bitmap all_gfx_bmp;
+
+  gfx::BitmapTable maps_bmp_;
+  gfx::BitmapTable current_graphics_set_;
+  gfx::BitmapTable sprite_previews_;
+  gfx::BitmapTable animated_maps_;
+
+  OWBlockset refresh_blockset_;
+
+  gui::zeml::Node layout_node_;
+  absl::Status status_;
+};
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/editor/settings_editor.cc

@@ -0,0 +1,85 @@
+
+#include "imgui/imgui.h"
+
+#include "absl/status/status.h"
+#include "app/editor/utils/flags.h"
+#include "app/editor/utils/keyboard_shortcuts.h"
+#include "app/editor/settings_editor.h"
+#include "app/editor/utils/flags.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginChild;
+using ImGui::BeginMenu;
+using ImGui::BeginTabBar;
+using ImGui::BeginTabItem;
+using ImGui::BeginTable;
+using ImGui::Checkbox;
+using ImGui::EndChild;
+using ImGui::EndMenu;
+using ImGui::EndTabBar;
+using ImGui::EndTabItem;
+using ImGui::EndTable;
+using ImGui::TableHeader;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetBgColor;
+using ImGui::TableSetColumnIndex;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+
+absl::Status SettingsEditor::Update() {
+  if (BeginTabBar("Settings", ImGuiTabBarFlags_None)) {
+    if (BeginTabItem("General")) {
+      DrawGeneralSettings();
+      EndTabItem();
+    }
+    if (BeginTabItem("Keyboard Shortcuts")) {
+      EndTabItem();
+    }
+    EndTabBar();
+  }
+
+  return absl::OkStatus();
+}
+
+void SettingsEditor::DrawGeneralSettings() {
+  if (BeginTable("##SettingsTable", 2,
+                 ImGuiTableFlags_Reorderable | ImGuiTableFlags_Hideable |
+                     ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable)) {
+    TableSetupColumn("Experiment Flags", ImGuiTableColumnFlags_WidthFixed,
+                     250.0f);
+    TableSetupColumn("General Setting", ImGuiTableColumnFlags_WidthStretch,
+                     0.0f);
+
+    TableHeadersRow();
+
+    TableNextColumn();
+    if (BeginChild("##GeneralSettingsStyleWrapper", ImVec2(0, 0),
+                   ImGuiChildFlags_FrameStyle)) {
+      static FlagsMenu flags;
+      flags.Draw();
+      EndChild();
+    }
+
+    TableNextColumn();
+    if (BeginChild("##GeneralSettingsWrapper", ImVec2(0, 0),
+                   ImGuiChildFlags_FrameStyle)) {
+      Text("TODO: Add some settings here");
+      EndChild();
+    }
+
+    EndTable();
+  }
+}
+
+absl::Status SettingsEditor::DrawKeyboardShortcuts() {
+  return absl::OkStatus();
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/settings_editor.h

@@ -0,0 +1,232 @@
+#ifndef YAZE_APP_EDITOR_SETTINGS_EDITOR_H
+#define YAZE_APP_EDITOR_SETTINGS_EDITOR_H
+
+#include "imgui/imgui.h"
+
+#include "absl/status/status.h"
+#include "app/editor/utils/editor.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+// Simple representation for a tree
+// (this is designed to be simple to understand for our demos, not to be
+// efficient etc.)
+struct ExampleTreeNode {
+  char Name[28];
+  ImGuiID UID = 0;
+  ExampleTreeNode* Parent = NULL;
+  ImVector<ExampleTreeNode*> Childs;
+
+  // Data
+  bool HasData = false;  // All leaves have data
+  bool DataIsEnabled = false;
+  int DataInt = 128;
+  ImVec2 DataVec2 = ImVec2(0.0f, 3.141592f);
+};
+
+// Simple representation of struct metadata/serialization data.
+// (this is a minimal version of what a typical advanced application may
+// provide)
+struct ExampleMemberInfo {
+  const char* Name;
+  ImGuiDataType DataType;
+  int DataCount;
+  int Offset;
+};
+
+// Metadata description of ExampleTreeNode struct.
+static const ExampleMemberInfo ExampleTreeNodeMemberInfos[]{
+    {"Enabled", ImGuiDataType_Bool, 1,
+     offsetof(ExampleTreeNode, DataIsEnabled)},
+    {"MyInt", ImGuiDataType_S32, 1, offsetof(ExampleTreeNode, DataInt)},
+    {"MyVec2", ImGuiDataType_Float, 2, offsetof(ExampleTreeNode, DataVec2)},
+};
+
+static ExampleTreeNode* ExampleTree_CreateNode(const char* name,
+                                               const ImGuiID uid,
+                                               ExampleTreeNode* parent) {
+  ExampleTreeNode* node = IM_NEW(ExampleTreeNode);
+  snprintf(node->Name, IM_ARRAYSIZE(node->Name), "%s", name);
+  node->UID = uid;
+  node->Parent = parent;
+  if (parent) parent->Childs.push_back(node);
+  return node;
+}
+
+// Create example tree data
+static ExampleTreeNode* ExampleTree_CreateDemoTree() {
+  static const char* root_names[] = {"Apple",     "Banana",     "Cherry",
+                                     "Kiwi",      "Mango",      "Orange",
+                                     "Pineapple", "Strawberry", "Watermelon"};
+  char name_buf[32];
+  ImGuiID uid = 0;
+  ExampleTreeNode* node_L0 = ExampleTree_CreateNode("<ROOT>", ++uid, NULL);
+  for (int idx_L0 = 0; idx_L0 < IM_ARRAYSIZE(root_names) * 2; idx_L0++) {
+    snprintf(name_buf, 32, "%s %d", root_names[idx_L0 / 2], idx_L0 % 2);
+    ExampleTreeNode* node_L1 = ExampleTree_CreateNode(name_buf, ++uid, node_L0);
+    const int number_of_childs = (int)strlen(node_L1->Name);
+    for (int idx_L1 = 0; idx_L1 < number_of_childs; idx_L1++) {
+      snprintf(name_buf, 32, "Child %d", idx_L1);
+      ExampleTreeNode* node_L2 =
+          ExampleTree_CreateNode(name_buf, ++uid, node_L1);
+      node_L2->HasData = true;
+      if (idx_L1 == 0) {
+        snprintf(name_buf, 32, "Sub-child %d", 0);
+        ExampleTreeNode* node_L3 =
+            ExampleTree_CreateNode(name_buf, ++uid, node_L2);
+        node_L3->HasData = true;
+      }
+    }
+  }
+  return node_L0;
+}
+
+struct ExampleAppPropertyEditor {
+  ImGuiTextFilter Filter;
+
+  void Draw(ExampleTreeNode* root_node) {
+    ImGui::SetNextItemWidth(-FLT_MIN);
+    ImGui::SetNextItemShortcut(ImGuiMod_Ctrl | ImGuiKey_F,
+                               ImGuiInputFlags_Tooltip);
+    ImGui::PushItemFlag(ImGuiItemFlags_NoNavDefaultFocus, true);
+    if (ImGui::InputTextWithHint("##Filter", "incl,-excl", Filter.InputBuf,
+                                 IM_ARRAYSIZE(Filter.InputBuf),
+                                 ImGuiInputTextFlags_EscapeClearsAll))
+      Filter.Build();
+    ImGui::PopItemFlag();
+
+    ImGuiTableFlags table_flags = ImGuiTableFlags_Resizable |
+                                  ImGuiTableFlags_ScrollY |
+                                  ImGuiTableFlags_RowBg;
+    if (ImGui::BeginTable("##split", 2, table_flags)) {
+      ImGui::TableSetupColumn("Object", ImGuiTableColumnFlags_WidthStretch,
+                              1.0f);
+      ImGui::TableSetupColumn("Contents", ImGuiTableColumnFlags_WidthStretch,
+                              2.0f);  // Default twice larger
+      // ImGui::TableSetupScrollFreeze(0, 1);
+      // ImGui::TableHeadersRow();
+
+      for (ExampleTreeNode* node : root_node->Childs)
+        if (Filter.PassFilter(node->Name))  // Filter root node
+          DrawTreeNode(node);
+      ImGui::EndTable();
+    }
+  }
+
+  void DrawTreeNode(ExampleTreeNode* node) {
+    // Object tree node
+    ImGui::PushID((int)node->UID);
+    ImGui::TableNextRow();
+    ImGui::TableSetColumnIndex(0);
+    ImGui::AlignTextToFramePadding();
+    ImGuiTreeNodeFlags tree_flags = ImGuiTreeNodeFlags_None;
+    tree_flags |=
+        ImGuiTreeNodeFlags_SpanAllColumns |
+        ImGuiTreeNodeFlags_AllowOverlap;  // Highlight whole row for visibility
+    tree_flags |=
+        ImGuiTreeNodeFlags_OpenOnArrow |
+        ImGuiTreeNodeFlags_OpenOnDoubleClick;  // Standard opening mode as we
+                                               // are likely to want to add
+                                               // selection afterwards
+    tree_flags |=
+        ImGuiTreeNodeFlags_NavLeftJumpsBackHere;  // Left arrow support
+    bool node_open =
+        ImGui::TreeNodeEx("##Object", tree_flags, "%s", node->Name);
+    ImGui::TableSetColumnIndex(1);
+    ImGui::TextDisabled("UID: 0x%08X", node->UID);
+
+    // Display child and data
+    if (node_open)
+      for (ExampleTreeNode* child : node->Childs) DrawTreeNode(child);
+    if (node_open && node->HasData) {
+      // In a typical application, the structure description would be derived
+      // from a data-driven system.
+      // - We try to mimic this with our ExampleMemberInfo structure and the
+      // ExampleTreeNodeMemberInfos[] array.
+      // - Limits and some details are hard-coded to simplify the demo.
+      // - Text and Selectable are less high than framed widgets, using
+      // AlignTextToFramePadding() we add vertical spacing to make the
+      // selectable lines equal high.
+      for (const ExampleMemberInfo& field_desc : ExampleTreeNodeMemberInfos) {
+        ImGui::TableNextRow();
+        ImGui::TableSetColumnIndex(0);
+        ImGui::AlignTextToFramePadding();
+        ImGui::PushItemFlag(ImGuiItemFlags_NoTabStop | ImGuiItemFlags_NoNav,
+                            true);
+        ImGui::Selectable(field_desc.Name, false,
+                          ImGuiSelectableFlags_SpanAllColumns |
+                              ImGuiSelectableFlags_AllowOverlap);
+        ImGui::PopItemFlag();
+        ImGui::TableSetColumnIndex(1);
+        ImGui::PushID(field_desc.Name);
+        void* field_ptr = (void*)(((unsigned char*)node) + field_desc.Offset);
+        switch (field_desc.DataType) {
+          case ImGuiDataType_Bool: {
+            IM_ASSERT(field_desc.DataCount == 1);
+            ImGui::Checkbox("##Editor", (bool*)field_ptr);
+            break;
+          }
+          case ImGuiDataType_S32: {
+            int v_min = INT_MIN, v_max = INT_MAX;
+            ImGui::SetNextItemWidth(-FLT_MIN);
+            ImGui::DragScalarN("##Editor", field_desc.DataType, field_ptr,
+                               field_desc.DataCount, 1.0f, &v_min, &v_max);
+            break;
+          }
+          case ImGuiDataType_Float: {
+            float v_min = 0.0f, v_max = 1.0f;
+            ImGui::SetNextItemWidth(-FLT_MIN);
+            ImGui::SliderScalarN("##Editor", field_desc.DataType, field_ptr,
+                                 field_desc.DataCount, &v_min, &v_max);
+            break;
+          }
+        }
+        ImGui::PopID();
+      }
+    }
+    if (node_open) ImGui::TreePop();
+    ImGui::PopID();
+  }
+};
+
+// Demonstrate creating a simple property editor.
+static void ShowExampleAppPropertyEditor(bool* p_open) {
+  ImGui::SetNextWindowSize(ImVec2(430, 450), ImGuiCond_FirstUseEver);
+  if (!ImGui::Begin("Example: Property editor", p_open)) {
+    ImGui::End();
+    return;
+  }
+
+  static ExampleAppPropertyEditor property_editor;
+  static ExampleTreeNode* tree_data = ExampleTree_CreateDemoTree();
+  property_editor.Draw(tree_data);
+
+  ImGui::End();
+}
+
+class SettingsEditor : public Editor {
+ public:
+  SettingsEditor() : Editor() { type_ = EditorType::kSettings; }
+
+  absl::Status Update() override;
+
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+ private:
+  void DrawGeneralSettings();
+
+  absl::Status DrawKeyboardShortcuts();
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_SETTINGS_EDITOR_H_

src/app/editor/sprite/sprite_editor.cc

@@ -0,0 +1,278 @@
+#include "sprite_editor.h"
+
+#include "app/core/platform/file_dialog.h"
+#include "app/editor/sprite/zsprite.h"
+#include "app/gui/icons.h"
+#include "app/gui/input.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginTable;
+using ImGui::Button;
+using ImGui::EndTable;
+using ImGui::Selectable;
+using ImGui::Separator;
+using ImGui::TableHeadersRow;
+using ImGui::TableNextColumn;
+using ImGui::TableNextRow;
+using ImGui::TableSetupColumn;
+using ImGui::Text;
+
+absl::Status SpriteEditor::Update() {
+  if (rom()->is_loaded() && !sheets_loaded_) {
+    // Load the values for current_sheets_ array
+    sheets_loaded_ = true;
+  }
+
+  if (ImGui::BeginTabBar("##SpriteEditorTabs")) {
+    if (ImGui::BeginTabItem("Vanilla")) {
+      DrawVanillaSpriteEditor();
+      ImGui::EndTabItem();
+    }
+    if (ImGui::BeginTabItem("Custom")) {
+      DrawCustomSprites();
+      ImGui::EndTabItem();
+    }
+    ImGui::EndTabBar();
+  }
+
+  return status_.ok() ? absl::OkStatus() : status_;
+}
+
+void SpriteEditor::DrawVanillaSpriteEditor() {
+  if (ImGui::BeginTable("##SpriteCanvasTable", 3, ImGuiTableFlags_Resizable,
+                        ImVec2(0, 0))) {
+    TableSetupColumn("Sprites List", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableSetupColumn("Canvas", ImGuiTableColumnFlags_WidthStretch,
+                     ImGui::GetContentRegionAvail().x);
+    TableSetupColumn("Tile Selector", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableHeadersRow();
+    TableNextRow();
+
+    TableNextColumn();
+    DrawSpritesList();
+
+    TableNextColumn();
+    static int next_tab_id = 0;
+
+    if (ImGui::BeginTabBar("SpriteTabBar", kSpriteTabBarFlags)) {
+      if (ImGui::TabItemButton(ICON_MD_ADD, kSpriteTabBarFlags)) {
+        if (std::find(active_sprites_.begin(), active_sprites_.end(),
+                      current_sprite_id_) != active_sprites_.end()) {
+          // Room is already open
+          next_tab_id++;
+        }
+        active_sprites_.push_back(next_tab_id++);  // Add new tab
+      }
+
+      // Submit our regular tabs
+      for (int n = 0; n < active_sprites_.Size;) {
+        bool open = true;
+
+        if (active_sprites_[n] > sizeof(core::kSpriteDefaultNames) / 4) {
+          active_sprites_.erase(active_sprites_.Data + n);
+          continue;
+        }
+
+        if (ImGui::BeginTabItem(
+                core::kSpriteDefaultNames[active_sprites_[n]].data(), &open,
+                ImGuiTabItemFlags_None)) {
+          DrawSpriteCanvas();
+          ImGui::EndTabItem();
+        }
+
+        if (!open)
+          active_sprites_.erase(active_sprites_.Data + n);
+        else
+          n++;
+      }
+
+      ImGui::EndTabBar();
+    }
+
+    TableNextColumn();
+    if (sheets_loaded_) {
+      DrawCurrentSheets();
+    }
+    ImGui::EndTable();
+  }
+}
+
+void SpriteEditor::DrawSpriteCanvas() {
+  static bool flip_x = false;
+  static bool flip_y = false;
+  if (ImGui::BeginChild(gui::GetID("##SpriteCanvas"),
+                        ImGui::GetContentRegionAvail(), true)) {
+    sprite_canvas_.DrawBackground();
+    sprite_canvas_.DrawContextMenu();
+    sprite_canvas_.DrawGrid();
+    sprite_canvas_.DrawOverlay();
+
+    // Draw a table with OAM configuration
+    // X, Y, Tile, Palette, Priority, Flip X, Flip Y
+    if (ImGui::BeginTable("##OAMTable", 7, ImGuiTableFlags_Resizable,
+                          ImVec2(0, 0))) {
+      TableSetupColumn("X", ImGuiTableColumnFlags_WidthStretch);
+      TableSetupColumn("Y", ImGuiTableColumnFlags_WidthStretch);
+      TableSetupColumn("Tile", ImGuiTableColumnFlags_WidthStretch);
+      TableSetupColumn("Palette", ImGuiTableColumnFlags_WidthStretch);
+      TableSetupColumn("Priority", ImGuiTableColumnFlags_WidthStretch);
+      TableSetupColumn("Flip X", ImGuiTableColumnFlags_WidthStretch);
+      TableSetupColumn("Flip Y", ImGuiTableColumnFlags_WidthStretch);
+      TableHeadersRow();
+      TableNextRow();
+
+      TableNextColumn();
+      gui::InputHexWord("", &oam_config_.x);
+
+      TableNextColumn();
+      gui::InputHexWord("", &oam_config_.y);
+
+      TableNextColumn();
+      gui::InputHexByte("", &oam_config_.tile);
+
+      TableNextColumn();
+      gui::InputHexByte("", &oam_config_.palette);
+
+      TableNextColumn();
+      gui::InputHexByte("", &oam_config_.priority);
+
+      TableNextColumn();
+      if (ImGui::Checkbox("##XFlip", &flip_x)) {
+        oam_config_.flip_x = flip_x;
+      }
+
+      TableNextColumn();
+      if (ImGui::Checkbox("##YFlip", &flip_y)) {
+        oam_config_.flip_y = flip_y;
+      }
+
+      ImGui::EndTable();
+    }
+
+    DrawAnimationFrames();
+
+    DrawCustomSpritesMetadata();
+
+    ImGui::EndChild();
+  }
+}
+
+void SpriteEditor::DrawCurrentSheets() {
+  if (ImGui::BeginChild(gui::GetID("sheet_label"),
+                        ImVec2(ImGui::GetContentRegionAvail().x, 0), true,
+                        ImGuiWindowFlags_NoDecoration)) {
+    for (int i = 0; i < 8; i++) {
+      std::string sheet_label = absl::StrFormat("Sheet %d", i);
+      gui::InputHexByte(sheet_label.c_str(), &current_sheets_[i]);
+      if (i % 2 == 0) ImGui::SameLine();
+    }
+
+    graphics_sheet_canvas_.DrawBackground();
+    graphics_sheet_canvas_.DrawContextMenu();
+    graphics_sheet_canvas_.DrawTileSelector(32);
+    for (int i = 0; i < 8; i++) {
+      graphics_sheet_canvas_.DrawBitmap(
+          rom()->bitmap_manager()[current_sheets_[i]], 1, (i * 0x40) + 1, 2);
+    }
+    graphics_sheet_canvas_.DrawGrid();
+    graphics_sheet_canvas_.DrawOverlay();
+    ImGui::EndChild();
+  }
+}
+
+void SpriteEditor::DrawSpritesList() {
+  if (ImGui::BeginChild(gui::GetID("##SpritesList"),
+                        ImVec2(ImGui::GetContentRegionAvail().x, 0), true,
+                        ImGuiWindowFlags_NoDecoration)) {
+    int i = 0;
+    for (const auto each_sprite_name : core::kSpriteDefaultNames) {
+      rom()->resource_label()->SelectableLabelWithNameEdit(
+          current_sprite_id_ == i, "Sprite Names", core::UppercaseHexByte(i),
+          core::kSpriteDefaultNames[i].data());
+      if (ImGui::IsItemClicked()) {
+        current_sprite_id_ = i;
+        if (!active_sprites_.contains(i)) {
+          active_sprites_.push_back(i);
+        }
+      }
+      i++;
+    }
+    ImGui::EndChild();
+  }
+}
+
+void SpriteEditor::DrawAnimationFrames() {
+  if (ImGui::Button("Add Frame")) {
+    // Add a new frame
+  }
+  if (ImGui::Button("Remove Frame")) {
+    // Remove the current frame
+  }
+}
+
+void SpriteEditor::DrawCustomSprites() {
+  if (BeginTable("##CustomSpritesTable", 3,
+                 ImGuiTableFlags_Resizable | ImGuiTableFlags_Borders |
+                     ImGuiTableFlags_Reorderable | ImGuiTableFlags_Hideable,
+                 ImVec2(0, 0))) {
+    TableSetupColumn("Metadata", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableSetupColumn("Canvas", ImGuiTableColumnFlags_WidthFixed, 256);
+    TableSetupColumn("TIlesheets", ImGuiTableColumnFlags_WidthFixed, 256);
+
+    TableHeadersRow();
+    TableNextRow();
+    TableNextColumn();
+
+    Separator();
+    DrawCustomSpritesMetadata();
+
+    TableNextColumn();
+    DrawSpriteCanvas();
+
+    TableNextColumn();
+    DrawCurrentSheets();
+
+    EndTable();
+  }
+}
+
+void SpriteEditor::DrawCustomSpritesMetadata() {
+  // ZSprite Maker format open file dialog
+  if (ImGui::Button("Open ZSprite")) {
+    // Open ZSprite file
+    std::string file_path = FileDialogWrapper::ShowOpenFileDialog();
+    if (!file_path.empty()) {
+      zsprite::ZSprite zsprite;
+      status_ = zsprite.Load(file_path);
+      if (status_.ok()) {
+        custom_sprites_.push_back(zsprite);
+      }
+    }
+  }
+
+  for (const auto custom_sprite : custom_sprites_) {
+    Selectable("%s", custom_sprite.sprName.c_str());
+    if (ImGui::IsItemClicked()) {
+      current_sprite_id_ = 256 + stoi(custom_sprite.property_sprid.Text);
+      if (!active_sprites_.contains(current_sprite_id_)) {
+        active_sprites_.push_back(current_sprite_id_);
+      }
+    }
+    Separator();
+  }
+
+  for (const auto custom_sprite : custom_sprites_) {
+    // Draw the custom sprite metadata
+    Text("Sprite ID: %s", custom_sprite.property_sprid.Text.c_str());
+    Text("Sprite Name: %s", custom_sprite.property_sprname.Text.c_str());
+    Text("Sprite Palette: %s", custom_sprite.property_palette.Text.c_str());
+    Separator();
+  }
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/sprite/sprite_editor.h

@@ -0,0 +1,117 @@
+#ifndef YAZE_APP_EDITOR_SPRITE_EDITOR_H
+#define YAZE_APP_EDITOR_SPRITE_EDITOR_H
+
+#include "absl/status/status.h"
+#include "app/editor/sprite/zsprite.h"
+#include "app/editor/utils/editor.h"
+#include "app/gui/canvas.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+constexpr ImGuiTabItemFlags kSpriteTabFlags =
+    ImGuiTabItemFlags_Trailing | ImGuiTabItemFlags_NoTooltip;
+
+constexpr ImGuiTabBarFlags kSpriteTabBarFlags =
+    ImGuiTabBarFlags_AutoSelectNewTabs | ImGuiTabBarFlags_Reorderable |
+    ImGuiTabBarFlags_FittingPolicyResizeDown |
+    ImGuiTabBarFlags_TabListPopupButton;
+
+constexpr ImGuiTableFlags kSpriteTableFlags =
+    ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable |
+    ImGuiTableFlags_Hideable | ImGuiTableFlags_BordersOuter |
+    ImGuiTableFlags_BordersV;
+
+/**
+ * @class SpriteEditor
+ * @brief Allows the user to edit sprites.
+ *
+ * This class provides functionality for updating the sprite editor, drawing the
+ * editor table, drawing the sprite canvas, and drawing the current sheets.
+ */
+class SpriteEditor : public SharedRom, public Editor {
+ public:
+  SpriteEditor() { type_ = EditorType::kSprite; }
+
+  /**
+   * @brief Updates the sprite editor.
+   *
+   * @return An absl::Status indicating the success or failure of the update.
+   */
+  absl::Status Update() override;
+
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+
+ private:
+  void DrawVanillaSpriteEditor();
+
+  /**
+   * @brief Draws the sprites list.
+   */
+  void DrawSpritesList();
+
+  /**
+   * @brief Draws the sprite canvas.
+   */
+  void DrawSpriteCanvas();
+
+  /**
+   * @brief Draws the current sheets.
+   */
+  void DrawCurrentSheets();
+
+  void DrawCustomSprites();
+
+  void DrawCustomSpritesMetadata();
+
+  /**
+   * @brief Draws the animation frames manager.
+   */
+  void DrawAnimationFrames();
+
+  ImVector<int> active_sprites_; /**< Active sprites. */
+
+  int current_sprite_id_; /**< Current sprite ID. */
+  uint8_t current_sheets_[8] = {0x00, 0x0A, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00};
+  bool sheets_loaded_ =
+      false; /**< Flag indicating whether the sheets are loaded or not. */
+
+  // OAM Configuration
+  struct OAMConfig {
+    uint16_t x;       /**< X offset. */
+    uint16_t y;       /**< Y offset. */
+    uint8_t tile;     /**< Tile number. */
+    uint8_t palette;  /**< Palette number. */
+    uint8_t priority; /**< Priority. */
+    bool flip_x;      /**< Flip X. */
+    bool flip_y;      /**< Flip Y. */
+  };
+
+  OAMConfig oam_config_;   /**< OAM configuration. */
+  gui::Bitmap oam_bitmap_; /**< OAM bitmap. */
+
+  gui::Canvas sprite_canvas_{
+      "SpriteCanvas", ImVec2(0x200, 0x200),
+      gui::CanvasGridSize::k32x32}; /**< Sprite canvas. */
+
+  gui::Canvas graphics_sheet_canvas_{
+      "GraphicsSheetCanvas", ImVec2(0x80 * 2 + 2, 0x40 * 8 + 2),
+      gui::CanvasGridSize::k16x16}; /**< Graphics sheet canvas. */
+
+  std::vector<zsprite::ZSprite> custom_sprites_; /**< Sprites. */
+
+  absl::Status status_; /**< Status. */
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_SPRITE_EDITOR_H

src/app/editor/sprite/zsprite.h

@@ -0,0 +1,396 @@
+#ifndef YAZE_APP_EDITOR_SPRITE_ZSPRITE_H
+#define YAZE_APP_EDITOR_SPRITE_ZSPRITE_H
+
+#include "imgui/imgui.h"
+
+#include <algorithm>
+#include <cstdint>
+#include <fstream>
+#include <string>
+#include <vector>
+
+#include "absl/status/status.h"
+#include "app/gfx/snes_tile.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+/**
+ * @brief Namespace for the ZSprite format from Zarby's ZSpriteMaker.
+ */
+namespace zsprite {
+
+struct OamTile {
+  OamTile(uint8_t x, uint8_t y, bool mx, bool my, uint16_t id, uint8_t pal,
+          bool s, uint8_t p)
+      : x(x),
+        y(y),
+        mirror_x(mx),
+        mirror_y(my),
+        id(id),
+        palette(pal),
+        size(s),
+        priority(p) {}
+
+  uint8_t x;
+  uint8_t y;
+  bool mirror_x;
+  bool mirror_y;
+  uint16_t id;
+  uint8_t palette;
+  bool size;
+  uint8_t priority;
+  uint8_t z;
+};
+
+struct AnimationGroup {
+  AnimationGroup() = default;
+  AnimationGroup(uint8_t fs, uint8_t fe, uint8_t fsp, std::string fn)
+      : frame_start(fs), frame_end(fe), frame_speed(fsp), frame_name(fn) {}
+
+  std::string frame_name;
+  uint8_t frame_start;
+  uint8_t frame_end;
+  uint8_t frame_speed;
+  std::vector<OamTile> Tiles;
+};
+
+struct UserRoutine {
+  UserRoutine(std::string n, std::string c) : name(n), code(c) {}
+
+  std::string name;
+  std::string code;
+  int Count;
+};
+
+struct SubEditor {
+  std::vector<AnimationGroup> Frames;
+  std::vector<UserRoutine> user_routines;
+};
+
+struct SpriteProperty {
+  bool IsChecked;
+  std::string Text;
+};
+
+struct ZSprite {
+ public:
+  absl::Status Load(const std::string& filename) {
+    std::ifstream fs(filename, std::ios::binary);
+    if (!fs.is_open()) {
+      return absl::NotFoundError("File not found");
+    }
+
+    std::vector<char> buffer(std::istreambuf_iterator<char>(fs), {});
+
+    int animation_count = *reinterpret_cast<int32_t*>(&buffer[0]);
+    int offset = sizeof(int);
+
+    for (int i = 0; i < animation_count; i++) {
+      std::string aname = std::string(&buffer[offset]);
+      offset += aname.size() + 1;
+      uint8_t afs = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+      offset += sizeof(uint8_t);
+      uint8_t afe = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+      offset += sizeof(uint8_t);
+      uint8_t afspeed = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+      offset += sizeof(uint8_t);
+
+      animations.push_back(AnimationGroup(afs, afe, afspeed, aname));
+    }
+    // RefreshAnimations();
+
+    int frame_count = *reinterpret_cast<int32_t*>(&buffer[offset]);
+    offset += sizeof(int);
+    for (int i = 0; i < frame_count; i++) {
+      // editor.Frames[i] = new Frame();
+      editor.Frames.emplace_back();
+      // editor.AddUndo(i);
+      int tCount = *reinterpret_cast<int*>(&buffer[offset]);
+      offset += sizeof(int);
+
+      for (int j = 0; j < tCount; j++) {
+        ushort tid = *reinterpret_cast<ushort*>(&buffer[offset]);
+        offset += sizeof(ushort);
+        uint8_t tpal = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+        offset += sizeof(uint8_t);
+        bool tmx = *reinterpret_cast<bool*>(&buffer[offset]);
+        offset += sizeof(bool);
+        bool tmy = *reinterpret_cast<bool*>(&buffer[offset]);
+        offset += sizeof(bool);
+        uint8_t tprior = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+        offset += sizeof(uint8_t);
+        bool tsize = *reinterpret_cast<bool*>(&buffer[offset]);
+        offset += sizeof(bool);
+        uint8_t tx = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+        offset += sizeof(uint8_t);
+        uint8_t ty = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+        offset += sizeof(uint8_t);
+        uint8_t tz = *reinterpret_cast<uint8_t*>(&buffer[offset]);
+        offset += sizeof(uint8_t);
+        OamTile to(tx, ty, tmx, tmy, tid, tpal, tsize, tprior);
+        to.z = tz;
+        editor.Frames[i].Tiles.push_back(to);
+      }
+    }
+
+    // all sprites properties
+    property_blockable.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_canfall.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_collisionlayer.IsChecked =
+        *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_customdeath.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_damagesound.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_deflectarrows.IsChecked =
+        *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_deflectprojectiles.IsChecked =
+        *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_fast.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_harmless.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_impervious.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_imperviousarrow.IsChecked =
+        *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_imperviousmelee.IsChecked =
+        *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_interaction.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_isboss.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_persist.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_shadow.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_smallshadow.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_statis.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_statue.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+    property_watersprite.IsChecked = *reinterpret_cast<bool*>(&buffer[offset]);
+    offset += sizeof(bool);
+
+    property_prize.Text =
+        std::to_string(*reinterpret_cast<uint8_t*>(&buffer[offset]));
+    offset += sizeof(uint8_t);
+    property_palette.Text =
+        std::to_string(*reinterpret_cast<uint8_t*>(&buffer[offset]));
+    offset += sizeof(uint8_t);
+    property_oamnbr.Text =
+        std::to_string(*reinterpret_cast<uint8_t*>(&buffer[offset]));
+    offset += sizeof(uint8_t);
+    property_hitbox.Text =
+        std::to_string(*reinterpret_cast<uint8_t*>(&buffer[offset]));
+    offset += sizeof(uint8_t);
+    property_health.Text =
+        std::to_string(*reinterpret_cast<uint8_t*>(&buffer[offset]));
+    offset += sizeof(uint8_t);
+    property_damage.Text =
+        std::to_string(*reinterpret_cast<uint8_t*>(&buffer[offset]));
+    offset += sizeof(uint8_t);
+
+    if (offset != buffer.size()) {
+      property_sprname.Text = std::string(&buffer[offset]);
+      offset += property_sprname.Text.size() + 1;
+
+      int actionL = buffer[offset];
+      offset += sizeof(int);
+      for (int i = 0; i < actionL; i++) {
+        std::string a = std::string(&buffer[offset]);
+        offset += a.size() + 1;
+        std::string b = std::string(&buffer[offset]);
+        offset += b.size() + 1;
+        userRoutines.push_back(UserRoutine(a, b));
+      }
+    }
+
+    if (offset != buffer.size()) {
+      property_sprid.Text = std::string(&buffer[offset]);
+      fs.close();
+    }
+
+    // UpdateUserRoutines();
+    // userroutinesListbox.SelectedIndex = 0;
+    // RefreshScreen();
+
+    return absl::OkStatus();
+  }
+
+  absl::Status Save(const std::string& filename) {
+    std::ofstream fs(filename, std::ios::binary);
+    if (fs.is_open()) {
+      // Write data to the file
+      fs.write(reinterpret_cast<const char*>(animations.size()), sizeof(int));
+      for (const AnimationGroup& anim : animations) {
+        fs.write(anim.frame_name.c_str(), anim.frame_name.size() + 1);
+        fs.write(reinterpret_cast<const char*>(&anim.frame_start),
+                 sizeof(uint8_t));
+        fs.write(reinterpret_cast<const char*>(&anim.frame_end),
+                 sizeof(uint8_t));
+        fs.write(reinterpret_cast<const char*>(&anim.frame_speed),
+                 sizeof(uint8_t));
+      }
+
+      fs.write(reinterpret_cast<const char*>(editor.Frames.size()),
+               sizeof(int));
+      for (int i = 0; i < editor.Frames.size(); i++) {
+        fs.write(reinterpret_cast<const char*>(editor.Frames[i].Tiles.size()),
+                 sizeof(int));
+
+        for (int j = 0; j < editor.Frames[i].Tiles.size(); j++) {
+          fs.write(reinterpret_cast<const char*>(&editor.Frames[i].Tiles[j].id),
+                   sizeof(ushort));
+          fs.write(
+              reinterpret_cast<const char*>(&editor.Frames[i].Tiles[j].palette),
+              sizeof(uint8_t));
+          fs.write(reinterpret_cast<const char*>(
+                       &editor.Frames[i].Tiles[j].mirror_x),
+                   sizeof(bool));
+          fs.write(reinterpret_cast<const char*>(
+                       &editor.Frames[i].Tiles[j].mirror_y),
+                   sizeof(bool));
+          fs.write(reinterpret_cast<const char*>(
+                       &editor.Frames[i].Tiles[j].priority),
+                   sizeof(uint8_t));
+          fs.write(
+              reinterpret_cast<const char*>(&editor.Frames[i].Tiles[j].size),
+              sizeof(bool));
+          fs.write(reinterpret_cast<const char*>(&editor.Frames[i].Tiles[j].x),
+                   sizeof(uint8_t));
+          fs.write(reinterpret_cast<const char*>(&editor.Frames[i].Tiles[j].y),
+                   sizeof(uint8_t));
+          fs.write(reinterpret_cast<const char*>(&editor.Frames[i].Tiles[j].z),
+                   sizeof(uint8_t));
+        }
+      }
+
+      // Write other properties
+      fs.write(reinterpret_cast<const char*>(&property_blockable.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_canfall.IsChecked),
+               sizeof(bool));
+      fs.write(
+          reinterpret_cast<const char*>(&property_collisionlayer.IsChecked),
+          sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_customdeath.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_damagesound.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_deflectarrows.IsChecked),
+               sizeof(bool));
+      fs.write(
+          reinterpret_cast<const char*>(&property_deflectprojectiles.IsChecked),
+          sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_fast.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_harmless.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_impervious.IsChecked),
+               sizeof(bool));
+      fs.write(
+          reinterpret_cast<const char*>(&property_imperviousarrow.IsChecked),
+          sizeof(bool));
+      fs.write(
+          reinterpret_cast<const char*>(&property_imperviousmelee.IsChecked),
+          sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_interaction.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_isboss.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_persist.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_shadow.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_smallshadow.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_statis.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_statue.IsChecked),
+               sizeof(bool));
+      fs.write(reinterpret_cast<const char*>(&property_watersprite.IsChecked),
+               sizeof(bool));
+
+      fs.write(reinterpret_cast<const char*>(&property_prize.Text),
+               sizeof(uint8_t));
+      fs.write(reinterpret_cast<const char*>(&property_palette.Text),
+               sizeof(uint8_t));
+      fs.write(reinterpret_cast<const char*>(&property_oamnbr.Text),
+               sizeof(uint8_t));
+      fs.write(reinterpret_cast<const char*>(&property_hitbox.Text),
+               sizeof(uint8_t));
+      fs.write(reinterpret_cast<const char*>(&property_health.Text),
+               sizeof(uint8_t));
+      fs.write(reinterpret_cast<const char*>(&property_damage.Text),
+               sizeof(uint8_t));
+
+      fs.write(sprName.c_str(), sprName.size() + 1);
+
+      fs.write(reinterpret_cast<const char*>(userRoutines.size()), sizeof(int));
+      for (const UserRoutine& userR : userRoutines) {
+        fs.write(userR.name.c_str(), userR.name.size() + 1);
+        fs.write(userR.code.c_str(), userR.code.size() + 1);
+      }
+
+      fs.write(reinterpret_cast<const char*>(&property_sprid.Text),
+               sizeof(property_sprid.Text));
+
+      fs.close();
+    }
+
+    return absl::OkStatus();
+  }
+
+  std::string sprName;
+  std::vector<AnimationGroup> animations;
+  std::vector<UserRoutine> userRoutines;
+  SubEditor editor;
+
+  SpriteProperty property_blockable;
+  SpriteProperty property_canfall;
+  SpriteProperty property_collisionlayer;
+  SpriteProperty property_customdeath;
+  SpriteProperty property_damagesound;
+  SpriteProperty property_deflectarrows;
+  SpriteProperty property_deflectprojectiles;
+  SpriteProperty property_fast;
+  SpriteProperty property_harmless;
+  SpriteProperty property_impervious;
+  SpriteProperty property_imperviousarrow;
+  SpriteProperty property_imperviousmelee;
+  SpriteProperty property_interaction;
+  SpriteProperty property_isboss;
+  SpriteProperty property_persist;
+  SpriteProperty property_shadow;
+  SpriteProperty property_smallshadow;
+  SpriteProperty property_statis;
+  SpriteProperty property_statue;
+  SpriteProperty property_watersprite;
+  SpriteProperty property_sprname;
+
+  SpriteProperty property_prize;
+  SpriteProperty property_palette;
+  SpriteProperty property_oamnbr;
+  SpriteProperty property_hitbox;
+  SpriteProperty property_health;
+  SpriteProperty property_damage;
+
+  SpriteProperty property_sprid;
+};
+
+}  // namespace zsprite
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_SPRITE_ZSPRITE_H

src/app/editor/utils/editor.h

@@ -0,0 +1,65 @@
+#ifndef YAZE_APP_CORE_EDITOR_H
+#define YAZE_APP_CORE_EDITOR_H
+
+#include "absl/status/status.h"
+
+namespace yaze {
+namespace app {
+
+/**
+ * @namespace yaze::app::editor
+ * @brief Editors are the view controllers for the application.
+ */
+namespace editor {
+
+enum class EditorType {
+  kAssembly,
+  kDungeon,
+  kGraphics,
+  kMusic,
+  kOverworld,
+  kPalette,
+  kScreen,
+  kSprite,
+  kMessage,
+  kSettings,
+};
+
+constexpr std::array<const char*, 10> kEditorNames = {
+    "Assembly", "Dungeon", "Graphics", "Music",   "Overworld",
+    "Palette",  "Screen",  "Sprite",   "Message", "Settings",
+};
+
+/**
+ * @class Editor
+ * @brief Interface for editor classes.
+ *
+ * Provides basic editing operations that each editor should implement.
+ */
+class Editor {
+ public:
+  Editor() = default;
+  virtual ~Editor() = default;
+
+  virtual absl::Status Cut() = 0;
+  virtual absl::Status Copy() = 0;
+  virtual absl::Status Paste() = 0;
+
+  virtual absl::Status Undo() = 0;
+  virtual absl::Status Redo() = 0;
+
+  virtual absl::Status Update() = 0;
+
+  virtual absl::Status Find() = 0;
+
+  EditorType type() const { return type_; }
+
+ protected:
+  EditorType type_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_CORE_EDITOR_H

src/app/editor/utils/flags.h

@@ -0,0 +1,68 @@
+#ifndef YAZE_APP_EDITOR_UTILS_FLAGS_H
+#define YAZE_APP_EDITOR_UTILS_FLAGS_H
+
+#include "imgui/imgui.h"
+
+#include "core/common.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+using ImGui::BeginMenu;
+using ImGui::Checkbox;
+using ImGui::EndMenu;
+using ImGui::MenuItem;
+using ImGui::Separator;
+
+struct FlagsMenu : public core::ExperimentFlags {
+  void Draw() {
+    if (BeginMenu("Overworld Flags")) {
+      Checkbox("Enable Overworld Sprites",
+               &mutable_flags()->overworld.kDrawOverworldSprites);
+      Separator();
+      Checkbox("Save Overworld Maps",
+               &mutable_flags()->overworld.kSaveOverworldMaps);
+      Checkbox("Save Overworld Entrances",
+               &mutable_flags()->overworld.kSaveOverworldEntrances);
+      Checkbox("Save Overworld Exits",
+               &mutable_flags()->overworld.kSaveOverworldExits);
+      Checkbox("Save Overworld Items",
+               &mutable_flags()->overworld.kSaveOverworldItems);
+      Checkbox("Save Overworld Properties",
+               &mutable_flags()->overworld.kSaveOverworldProperties);
+      ImGui::EndMenu();
+    }
+
+    if (BeginMenu("Dungeon Flags")) {
+      Checkbox("Draw Dungeon Room Graphics",
+               &mutable_flags()->kDrawDungeonRoomGraphics);
+      Separator();
+      Checkbox("Save Dungeon Maps", &mutable_flags()->kSaveDungeonMaps);
+      ImGui::EndMenu();
+    }
+
+    if (BeginMenu("Emulator Flags")) {
+      Checkbox("Load Audio Device", &mutable_flags()->kLoadAudioDevice);
+      ImGui::EndMenu();
+    }
+
+    Checkbox("Use built-in file dialog",
+             &mutable_flags()->kNewFileDialogWrapper);
+    Checkbox("Enable Console Logging", &mutable_flags()->kLogToConsole);
+    Checkbox("Enable Texture Streaming",
+             &mutable_flags()->kLoadTexturesAsStreaming);
+    Checkbox("Use Bitmap Manager", &mutable_flags()->kUseBitmapManager);
+    Checkbox("Log Instructions to Debugger",
+             &mutable_flags()->kLogInstructions);
+    Checkbox("Save All Palettes", &mutable_flags()->kSaveAllPalettes);
+    Checkbox("Save Gfx Groups", &mutable_flags()->kSaveGfxGroups);
+    Checkbox("Use New ImGui Input", &mutable_flags()->kUseNewImGuiInput);
+  }
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_UTILS_FLAGS_H_

src/app/editor/utils/gfx_context.cc

@@ -0,0 +1,26 @@
+#include "app/editor/utils/gfx_context.h"
+
+#include "imgui/imgui.h"
+
+#include <cmath>
+
+#include "app/editor/graphics/palette_editor.h"
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+namespace context {
+
+std::unordered_map<uint8_t, gfx::Paletteset> GfxContext::palettesets_;
+
+}
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/utils/gfx_context.h

@@ -0,0 +1,36 @@
+#ifndef YAZE_APP_EDITOR_VRAM_CONTEXT_H
+#define YAZE_APP_EDITOR_VRAM_CONTEXT_H
+
+#include "imgui/imgui.h"
+
+#include <cmath>
+#include <vector>
+
+#include "app/editor/utils/editor.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/gui/canvas.h"
+#include "app/gui/icons.h"
+#include "app/rom.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+namespace context {
+
+/**
+ * @brief Shared graphical context across editors.
+ */
+class GfxContext {
+ protected:
+  // Palettesets for the tile16 individual tiles
+  static std::unordered_map<uint8_t, gfx::Paletteset> palettesets_;
+};
+
+}  // namespace context
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_VRAM_CONTEXT_H

src/app/editor/utils/keyboard_shortcuts.h

@@ -0,0 +1,25 @@
+#ifndef YAZE_APP_EDITOR_UTILS_KEYBOARD_SHORTCUTS_H
+#define YAZE_APP_EDITOR_UTILS_KEYBOARD_SHORTCUTS_H
+
+#include "imgui/imgui.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+struct KeyboardShortcuts {
+  enum class ShortcutType {
+    kCut,
+    kCopy,
+    kPaste,
+    kUndo,
+    kRedo,
+    kFind,
+  };
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_UTILS_KEYBOARD_SHORTCUTS_H_

src/app/editor/utils/recent_files.h

@@ -0,0 +1,64 @@
+#ifndef YAZE_APP_EDITOR_UTILS_RECENT_FILES_H
+#define YAZE_APP_EDITOR_UTILS_RECENT_FILES_H
+
+#include <algorithm>
+#include <fstream>
+#include <string>
+#include <vector>
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+class RecentFilesManager {
+ public:
+  RecentFilesManager(const std::string& filename) : filename_(filename) {}
+
+  void AddFile(const std::string& filePath) {
+    // Add a file to the list, avoiding duplicates
+    auto it = std::find(recentFiles_.begin(), recentFiles_.end(), filePath);
+    if (it == recentFiles_.end()) {
+      recentFiles_.push_back(filePath);
+    }
+  }
+
+  void Save() {
+    std::ofstream file(filename_);
+    if (!file.is_open()) {
+      return;  // Handle the error appropriately
+    }
+
+    for (const auto& filePath : recentFiles_) {
+      file << filePath << std::endl;
+    }
+  }
+
+  void Load() {
+    std::ifstream file(filename_);
+    if (!file.is_open()) {
+      return;  // Handle the error appropriately
+    }
+
+    recentFiles_.clear();
+    std::string line;
+    while (std::getline(file, line)) {
+      if (!line.empty()) {
+        recentFiles_.push_back(line);
+      }
+    }
+  }
+
+  const std::vector<std::string>& GetRecentFiles() const {
+    return recentFiles_;
+  }
+
+ private:
+  std::string filename_;
+  std::vector<std::string> recentFiles_;
+};
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_UTILS_RECENT_FILES_H

src/app/emu/CMakeLists.txt

@@ -0,0 +1,23 @@
+add_executable(
+  yaze_emu
+  app/rom.cc
+  app/emu/debug/emu.cc
+  ${YAZE_APP_EMU_SRC}
+  ${YAZE_APP_CORE_SRC}
+  ${YAZE_APP_EDITOR_SRC}
+  ${YAZE_APP_GFX_SRC}
+  ${YAZE_APP_ZELDA3_SRC}
+  ${YAZE_GUI_SRC}
+  ${IMGUI_SRC}
+)
+
+target_include_directories(
+  yaze_emu PUBLIC
+  lib/
+  app/
+  ${CMAKE_SOURCE_DIR}/src/
+  ${PNG_INCLUDE_DIRS}
+  ${SDL2_INCLUDE_DIR}
+)
+
+target_link_libraries(yaze_emu PUBLIC ${ABSL_TARGETS} ${SDL_TARGETS} ${PNG_LIBRARIES} ${CMAKE_DL_LIBS} ImGui)

src/app/emu/audio/apu.cc

@@ -0,0 +1,207 @@
+#include "app/emu/audio/apu.h"
+
+#include <SDL.h>
+
+#include <cstdint>
+#include <functional>
+#include <iostream>
+#include <vector>
+
+#include "app/emu/audio/dsp.h"
+#include "app/emu/audio/spc700.h"
+#include "app/emu/cpu/clock.h"
+#include "app/emu/memory/memory.h"
+
+namespace yaze {
+namespace app {
+namespace emu {
+namespace audio {
+
+static const double apuCyclesPerMaster = (32040 * 32) / (1364 * 262 * 60.0);
+static const double apuCyclesPerMasterPal = (32040 * 32) / (1364 * 312 * 50.0);
+
+static const uint8_t bootRom[0x40] = {
+    0xcd, 0xef, 0xbd, 0xe8, 0x00, 0xc6, 0x1d, 0xd0, 0xfc, 0x8f, 0xaa,
+    0xf4, 0x8f, 0xbb, 0xf5, 0x78, 0xcc, 0xf4, 0xd0, 0xfb, 0x2f, 0x19,
+    0xeb, 0xf4, 0xd0, 0xfc, 0x7e, 0xf4, 0xd0, 0x0b, 0xe4, 0xf5, 0xcb,
+    0xf4, 0xd7, 0x00, 0xfc, 0xd0, 0xf3, 0xab, 0x01, 0x10, 0xef, 0x7e,
+    0xf4, 0x10, 0xeb, 0xba, 0xf6, 0xda, 0x00, 0xba, 0xf4, 0xc4, 0xf4,
+    0xdd, 0x5d, 0xd0, 0xdb, 0x1f, 0x00, 0x00, 0xc0, 0xff};
+
+void Apu::Init() {
+  ram.resize(0x10000);
+  for (int i = 0; i < 0x10000; i++) {
+    ram[i] = 0;
+  }
+  // Copy the boot rom into the ram at ffc0
+  for (int i = 0; i < 0x40; i++) {
+    ram[0xffc0 + i] = bootRom[i];
+  }
+}
+
+void Apu::Reset() {
+  spc700_.Reset(true);
+  dsp_.Reset();
+  for (int i = 0; i < 0x10000; i++) {
+    ram[i] = 0;
+  }
+  // Copy the boot rom into the ram at ffc0
+  for (int i = 0; i < 0x40; i++) {
+    ram[0xffc0 + i] = bootRom[i];
+  }
+  rom_readable_ = true;
+  dsp_adr_ = 0;
+  cycles_ = 0;
+  std::fill(in_ports_.begin(), in_ports_.end(), 0);
+  std::fill(out_ports_.begin(), out_ports_.end(), 0);
+  for (int i = 0; i < 3; i++) {
+    timer_[i].cycles = 0;
+    timer_[i].divider = 0;
+    timer_[i].target = 0;
+    timer_[i].counter = 0;
+    timer_[i].enabled = false;
+  }
+}
+
+void Apu::RunCycles(uint64_t cycles) {
+  uint64_t sync_to =
+      (uint64_t)cycles *
+      (memory_.pal_timing() ? apuCyclesPerMasterPal : apuCyclesPerMaster);
+
+  while (cycles_ < sync_to) {
+    spc700_.RunOpcode();
+  }
+}
+
+void Apu::Cycle() {
+  if ((cycles_ & 0x1f) == 0) {
+    // every 32 cycles
+    dsp_.Cycle();
+  }
+
+  // handle timers
+  for (int i = 0; i < 3; i++) {
+    if (timer_[i].cycles == 0) {
+      timer_[i].cycles = i == 2 ? 16 : 128;
+      if (timer_[i].enabled) {
+        timer_[i].divider++;
+        if (timer_[i].divider == timer_[i].target) {
+          timer_[i].divider = 0;
+          timer_[i].counter++;
+          timer_[i].counter &= 0xf;
+        }
+      }
+    }
+    timer_[i].cycles--;
+  }
+
+  cycles_++;
+}
+
+uint8_t Apu::Read(uint16_t adr) {
+  switch (adr) {
+    case 0xf0:
+    case 0xf1:
+    case 0xfa:
+    case 0xfb:
+    case 0xfc: {
+      return 0;
+    }
+    case 0xf2: {
+      return dsp_adr_;
+    }
+    case 0xf3: {
+      return dsp_.Read(dsp_adr_ & 0x7f);
+    }
+    case 0xf4:
+    case 0xf5:
+    case 0xf6:
+    case 0xf7:
+    case 0xf8:
+    case 0xf9: {
+      return in_ports_[adr - 0xf4];
+    }
+    case 0xfd:
+    case 0xfe:
+    case 0xff: {
+      uint8_t ret = timer_[adr - 0xfd].counter;
+      timer_[adr - 0xfd].counter = 0;
+      return ret;
+    }
+  }
+  if (rom_readable_ && adr >= 0xffc0) {
+    return bootRom[adr - 0xffc0];
+  }
+  return ram[adr];
+}
+
+void Apu::Write(uint16_t adr, uint8_t val) {
+  switch (adr) {
+    case 0xf0: {
+      break;  // test register
+    }
+    case 0xf1: {
+      for (int i = 0; i < 3; i++) {
+        if (!timer_[i].enabled && (val & (1 << i))) {
+          timer_[i].divider = 0;
+          timer_[i].counter = 0;
+        }
+        timer_[i].enabled = val & (1 << i);
+      }
+      if (val & 0x10) {
+        in_ports_[0] = 0;
+        in_ports_[1] = 0;
+      }
+      if (val & 0x20) {
+        in_ports_[2] = 0;
+        in_ports_[3] = 0;
+      }
+      rom_readable_ = val & 0x80;
+      break;
+    }
+    case 0xf2: {
+      dsp_adr_ = val;
+      break;
+    }
+    case 0xf3: {
+      if (dsp_adr_ < 0x80) dsp_.Write(dsp_adr_, val);
+      break;
+    }
+    case 0xf4:
+    case 0xf5:
+    case 0xf6:
+    case 0xf7: {
+      out_ports_[adr - 0xf4] = val;
+      break;
+    }
+    case 0xf8:
+    case 0xf9: {
+      in_ports_[adr - 0xf4] = val;
+      break;
+    }
+    case 0xfa:
+    case 0xfb:
+    case 0xfc: {
+      timer_[adr - 0xfa].target = val;
+      break;
+    }
+  }
+  ram[adr] = val;
+}
+
+uint8_t Apu::SpcRead(uint16_t adr) {
+  Cycle();
+  return Read(adr);
+}
+
+void Apu::SpcWrite(uint16_t adr, uint8_t val) {
+  Cycle();
+  Write(adr, val);
+}
+
+void Apu::SpcIdle(bool waiting) { Cycle(); }
+
+}  // namespace audio
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze

src/app/emu/audio/apu.h

@@ -0,0 +1,100 @@
+#ifndef YAZE_APP_EMU_APU_H_
+#define YAZE_APP_EMU_APU_H_
+
+#include <cstdint>
+#include <iostream>
+#include <vector>
+
+#include "app/emu/audio/dsp.h"
+#include "app/emu/audio/spc700.h"
+#include "app/emu/memory/memory.h"
+
+namespace yaze {
+namespace app {
+namespace emu {
+namespace audio {
+
+using namespace memory;
+
+typedef struct Timer {
+  uint8_t cycles;
+  uint8_t divider;
+  uint8_t target;
+  uint8_t counter;
+  bool enabled;
+} Timer;
+
+/**
+ * @class Apu
+ * @brief The Apu class represents the Audio Processing Unit (APU) of a system.
+ *
+ * The Apu class is responsible for generating audio samples and managing the
+ * APU state. It interacts with the Memory, AudioRam, and Clock classes to
+ * read/write data and update the clock. The class also implements the Observer
+ * interface to receive notifications from the system.
+ *
+ * @par IPL ROM Info
+ * 64 kilobytes of RAM are mapped across the 16-bit memory space of the SPC-700.
+ * Some regions of this space are overlaid with special hardware functions.
+ *
+ * @par Range 	      Note
+ * $0000-00EF 	Zero Page RAM
+ * $00F0-00FF 	Sound CPU Registers
+ * $0100-01FF 	Stack Page RAM
+ * $0200-FFBF 	RAM
+ * $FFC0-FFFF 	IPL ROM or RAM
+ *
+ * The region at $FFC0-FFFF will normally read from the 64-byte IPL ROM, but the
+ * underlying RAM can always be written to, and the high bit of the Control
+ * register $F1 can be cleared to unmap the IPL ROM and allow read access to
+ * this RAM.
+ */
+class Apu {
+ public:
+  Apu(MemoryImpl &memory) : memory_(memory) {}
+
+  void Init();
+  void Reset();
+
+  void RunCycles(uint64_t cycles);
+  uint8_t SpcRead(uint16_t address);
+  void SpcWrite(uint16_t address, uint8_t data);
+  void SpcIdle(bool waiting);
+
+  void Cycle();
+
+  uint8_t Read(uint16_t address);
+  void Write(uint16_t address, uint8_t data);
+
+  auto dsp() -> Dsp & { return dsp_; }
+  auto spc700() -> Spc700 & { return spc700_; }
+
+  // Port buffers (equivalent to $2140 to $2143 for the main CPU)
+  std::array<uint8_t, 6> in_ports_;  // includes 2 bytes of ram
+  std::array<uint8_t, 4> out_ports_;
+  std::vector<uint8_t> ram = std::vector<uint8_t>(0x10000, 0);
+
+ private:
+  bool rom_readable_ = false;
+
+  uint8_t dsp_adr_ = 0;
+  uint32_t cycles_ = 0;
+
+  MemoryImpl &memory_;
+  std::array<Timer, 3> timer_;
+
+  ApuCallbacks callbacks_ = {
+      [&](uint16_t adr, uint8_t val) { SpcWrite(adr, val); },
+      [&](uint16_t adr) { return SpcRead(adr); },
+      [&](bool waiting) { SpcIdle(waiting); },
+  };
+  Dsp dsp_{ram};
+  Spc700 spc700_{callbacks_};
+};
+
+}  // namespace audio
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze
+
+#endif

src/app/emu/audio/dsp.cc

@@ -0,0 +1,637 @@
+#include "app/emu/audio/dsp.h"
+
+#include <cstring>
+
+#include "app/emu/memory/memory.h"
+
+namespace yaze {
+namespace app {
+namespace emu {
+namespace audio {
+
+static const int rateValues[32] = {0,   2048, 1536, 1280, 1024, 768, 640, 512,
+                                   384, 320,  256,  192,  160,  128, 96,  80,
+                                   64,  48,   40,   32,   24,   20,  16,  12,
+                                   10,  8,    6,    5,    4,    3,   2,   1};
+
+static const int rateOffsets[32] = {0,   0, 1040, 536, 0, 1040, 536, 0, 1040,
+                                    536, 0, 1040, 536, 0, 1040, 536, 0, 1040,
+                                    536, 0, 1040, 536, 0, 1040, 536, 0, 1040,
+                                    536, 0, 1040, 536, 0};
+
+static const int gaussValues[512] = {
+    0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+    0x000, 0x000, 0x000, 0x000, 0x000, 0x001, 0x001, 0x001, 0x001, 0x001, 0x001,
+    0x001, 0x001, 0x001, 0x001, 0x001, 0x002, 0x002, 0x002, 0x002, 0x002, 0x002,
+    0x002, 0x003, 0x003, 0x003, 0x003, 0x003, 0x004, 0x004, 0x004, 0x004, 0x004,
+    0x005, 0x005, 0x005, 0x005, 0x006, 0x006, 0x006, 0x006, 0x007, 0x007, 0x007,
+    0x008, 0x008, 0x008, 0x009, 0x009, 0x009, 0x00a, 0x00a, 0x00a, 0x00b, 0x00b,
+    0x00b, 0x00c, 0x00c, 0x00d, 0x00d, 0x00e, 0x00e, 0x00f, 0x00f, 0x00f, 0x010,
+    0x010, 0x011, 0x011, 0x012, 0x013, 0x013, 0x014, 0x014, 0x015, 0x015, 0x016,
+    0x017, 0x017, 0x018, 0x018, 0x019, 0x01a, 0x01b, 0x01b, 0x01c, 0x01d, 0x01d,
+    0x01e, 0x01f, 0x020, 0x020, 0x021, 0x022, 0x023, 0x024, 0x024, 0x025, 0x026,
+    0x027, 0x028, 0x029, 0x02a, 0x02b, 0x02c, 0x02d, 0x02e, 0x02f, 0x030, 0x031,
+    0x032, 0x033, 0x034, 0x035, 0x036, 0x037, 0x038, 0x03a, 0x03b, 0x03c, 0x03d,
+    0x03e, 0x040, 0x041, 0x042, 0x043, 0x045, 0x046, 0x047, 0x049, 0x04a, 0x04c,
+    0x04d, 0x04e, 0x050, 0x051, 0x053, 0x054, 0x056, 0x057, 0x059, 0x05a, 0x05c,
+    0x05e, 0x05f, 0x061, 0x063, 0x064, 0x066, 0x068, 0x06a, 0x06b, 0x06d, 0x06f,
+    0x071, 0x073, 0x075, 0x076, 0x078, 0x07a, 0x07c, 0x07e, 0x080, 0x082, 0x084,
+    0x086, 0x089, 0x08b, 0x08d, 0x08f, 0x091, 0x093, 0x096, 0x098, 0x09a, 0x09c,
+    0x09f, 0x0a1, 0x0a3, 0x0a6, 0x0a8, 0x0ab, 0x0ad, 0x0af, 0x0b2, 0x0b4, 0x0b7,
+    0x0ba, 0x0bc, 0x0bf, 0x0c1, 0x0c4, 0x0c7, 0x0c9, 0x0cc, 0x0cf, 0x0d2, 0x0d4,
+    0x0d7, 0x0da, 0x0dd, 0x0e0, 0x0e3, 0x0e6, 0x0e9, 0x0ec, 0x0ef, 0x0f2, 0x0f5,
+    0x0f8, 0x0fb, 0x0fe, 0x101, 0x104, 0x107, 0x10b, 0x10e, 0x111, 0x114, 0x118,
+    0x11b, 0x11e, 0x122, 0x125, 0x129, 0x12c, 0x130, 0x133, 0x137, 0x13a, 0x13e,
+    0x141, 0x145, 0x148, 0x14c, 0x150, 0x153, 0x157, 0x15b, 0x15f, 0x162, 0x166,
+    0x16a, 0x16e, 0x172, 0x176, 0x17a, 0x17d, 0x181, 0x185, 0x189, 0x18d, 0x191,
+    0x195, 0x19a, 0x19e, 0x1a2, 0x1a6, 0x1aa, 0x1ae, 0x1b2, 0x1b7, 0x1bb, 0x1bf,
+    0x1c3, 0x1c8, 0x1cc, 0x1d0, 0x1d5, 0x1d9, 0x1dd, 0x1e2, 0x1e6, 0x1eb, 0x1ef,
+    0x1f3, 0x1f8, 0x1fc, 0x201, 0x205, 0x20a, 0x20f, 0x213, 0x218, 0x21c, 0x221,
+    0x226, 0x22a, 0x22f, 0x233, 0x238, 0x23d, 0x241, 0x246, 0x24b, 0x250, 0x254,
+    0x259, 0x25e, 0x263, 0x267, 0x26c, 0x271, 0x276, 0x27b, 0x280, 0x284, 0x289,
+    0x28e, 0x293, 0x298, 0x29d, 0x2a2, 0x2a6, 0x2ab, 0x2b0, 0x2b5, 0x2ba, 0x2bf,
+    0x2c4, 0x2c9, 0x2ce, 0x2d3, 0x2d8, 0x2dc, 0x2e1, 0x2e6, 0x2eb, 0x2f0, 0x2f5,
+    0x2fa, 0x2ff, 0x304, 0x309, 0x30e, 0x313, 0x318, 0x31d, 0x322, 0x326, 0x32b,
+    0x330, 0x335, 0x33a, 0x33f, 0x344, 0x349, 0x34e, 0x353, 0x357, 0x35c, 0x361,
+    0x366, 0x36b, 0x370, 0x374, 0x379, 0x37e, 0x383, 0x388, 0x38c, 0x391, 0x396,
+    0x39b, 0x39f, 0x3a4, 0x3a9, 0x3ad, 0x3b2, 0x3b7, 0x3bb, 0x3c0, 0x3c5, 0x3c9,
+    0x3ce, 0x3d2, 0x3d7, 0x3dc, 0x3e0, 0x3e5, 0x3e9, 0x3ed, 0x3f2, 0x3f6, 0x3fb,
+    0x3ff, 0x403, 0x408, 0x40c, 0x410, 0x415, 0x419, 0x41d, 0x421, 0x425, 0x42a,
+    0x42e, 0x432, 0x436, 0x43a, 0x43e, 0x442, 0x446, 0x44a, 0x44e, 0x452, 0x455,
+    0x459, 0x45d, 0x461, 0x465, 0x468, 0x46c, 0x470, 0x473, 0x477, 0x47a, 0x47e,
+    0x481, 0x485, 0x488, 0x48c, 0x48f, 0x492, 0x496, 0x499, 0x49c, 0x49f, 0x4a2,
+    0x4a6, 0x4a9, 0x4ac, 0x4af, 0x4b2, 0x4b5, 0x4b7, 0x4ba, 0x4bd, 0x4c0, 0x4c3,
+    0x4c5, 0x4c8, 0x4cb, 0x4cd, 0x4d0, 0x4d2, 0x4d5, 0x4d7, 0x4d9, 0x4dc, 0x4de,
+    0x4e0, 0x4e3, 0x4e5, 0x4e7, 0x4e9, 0x4eb, 0x4ed, 0x4ef, 0x4f1, 0x4f3, 0x4f5,
+    0x4f6, 0x4f8, 0x4fa, 0x4fb, 0x4fd, 0x4ff, 0x500, 0x502, 0x503, 0x504, 0x506,
+    0x507, 0x508, 0x50a, 0x50b, 0x50c, 0x50d, 0x50e, 0x50f, 0x510, 0x511, 0x511,
+    0x512, 0x513, 0x514, 0x514, 0x515, 0x516, 0x516, 0x517, 0x517, 0x517, 0x518,
+    0x518, 0x518, 0x518, 0x518, 0x519, 0x519};
+
+void Dsp::Reset() {
+  memset(ram, 0, sizeof(ram));
+  ram[0x7c] = 0xff;  // set ENDx
+  for (int i = 0; i < 8; i++) {
+    channel[i].pitch = 0;
+    channel[i].pitchCounter = 0;
+    channel[i].pitchModulation = false;
+    memset(channel[i].decodeBuffer, 0, sizeof(channel[i].decodeBuffer));
+    channel[i].bufferOffset = 0;
+    channel[i].srcn = 0;
+    channel[i].decodeOffset = 0;
+    channel[i].blockOffset = 0;
+    channel[i].brrHeader = 0;
+    channel[i].useNoise = false;
+    channel[i].startDelay = 0;
+    memset(channel[i].adsrRates, 0, sizeof(channel[i].adsrRates));
+    channel[i].adsrState = 0;
+    channel[i].sustainLevel = 0;
+    channel[i].gainSustainLevel = 0;
+    channel[i].useGain = false;
+    channel[i].gainMode = 0;
+    channel[i].directGain = false;
+    channel[i].gainValue = 0;
+    channel[i].preclampGain = 0;
+    channel[i].gain = 0;
+    channel[i].keyOn = false;
+    channel[i].keyOff = false;
+    channel[i].sampleOut = 0;
+    channel[i].volumeL = 0;
+    channel[i].volumeR = 0;
+    channel[i].echoEnable = false;
+  }
+  counter = 0;
+  dirPage = 0;
+  evenCycle = true;
+  mute = true;
+  reset = true;
+  masterVolumeL = 0;
+  masterVolumeR = 0;
+  sampleOutL = 0;
+  sampleOutR = 0;
+  echoOutL = 0;
+  echoOutR = 0;
+  noiseSample = 0x4000;
+  noiseRate = 0;
+  echoWrites = false;
+  echoVolumeL = 0;
+  echoVolumeR = 0;
+  feedbackVolume = 0;
+  echoBufferAdr = 0;
+  echoDelay = 0;
+  echoLength = 0;
+  echoBufferIndex = 0;
+  firBufferIndex = 0;
+  memset(firValues, 0, sizeof(firValues));
+  memset(firBufferL, 0, sizeof(firBufferL));
+  memset(firBufferR, 0, sizeof(firBufferR));
+  memset(sampleBuffer, 0, sizeof(sampleBuffer));
+  sampleOffset = 0;
+}
+
+void Dsp::NewFrame() {
+  lastFrameBoundary = sampleOffset;
+}
+
+void Dsp::Cycle() {
+  sampleOutL = 0;
+  sampleOutR = 0;
+  echoOutL = 0;
+  echoOutR = 0;
+  for (int i = 0; i < 8; i++) {
+    CycleChannel(i);
+  }
+  HandleEcho();  // also applies master volume
+  counter = counter == 0 ? 30720 : counter - 1;
+  HandleNoise();
+  evenCycle = !evenCycle;
+  // handle mute flag
+  if (mute) {
+    sampleOutL = 0;
+    sampleOutR = 0;
+  }
+  // put final sample in the samplebuffer
+  sampleBuffer[(sampleOffset & 0x3ff) * 2] = sampleOutL;
+  sampleBuffer[(sampleOffset++ & 0x3ff) * 2 + 1] = sampleOutR;
+}
+
+static int clamp16(int val) {
+  return val < -0x8000 ? -0x8000 : (val > 0x7fff ? 0x7fff : val);
+}
+
+static int clip16(int val) { return (int16_t)(val & 0xffff); }
+
+bool Dsp::CheckCounter(int rate) {
+  if (rate == 0) return false;
+  return ((counter + rateOffsets[rate]) % rateValues[rate]) == 0;
+}
+
+void Dsp::HandleEcho() {
+  // increment fir buffer index
+  firBufferIndex++;
+  firBufferIndex &= 0x7;
+  // get value out of ram
+  uint16_t adr = echoBufferAdr + echoBufferIndex;
+  int16_t ramSample = aram_[adr] | (aram_[(adr + 1) & 0xffff] << 8);
+  firBufferL[firBufferIndex] = ramSample >> 1;
+  ramSample = aram_[(adr + 2) & 0xffff] | (aram_[(adr + 3) & 0xffff] << 8);
+  firBufferR[firBufferIndex] = ramSample >> 1;
+  // calculate FIR-sum
+  int sumL = 0, sumR = 0;
+  for (int i = 0; i < 8; i++) {
+    sumL += (firBufferL[(firBufferIndex + i + 1) & 0x7] * firValues[i]) >> 6;
+    sumR += (firBufferR[(firBufferIndex + i + 1) & 0x7] * firValues[i]) >> 6;
+    if (i == 6) {
+      // clip to 16-bit before last addition
+      sumL = clip16(sumL);
+      sumR = clip16(sumR);
+    }
+  }
+  sumL = clamp16(sumL) & ~1;
+  sumR = clamp16(sumR) & ~1;
+  // apply master volume and modify output with sum
+  sampleOutL = clamp16(((sampleOutL * masterVolumeL) >> 7) +
+                       ((sumL * echoVolumeL) >> 7));
+  sampleOutR = clamp16(((sampleOutR * masterVolumeR) >> 7) +
+                       ((sumR * echoVolumeR) >> 7));
+  // get echo value
+  int echoL = clamp16(echoOutL + clip16((sumL * feedbackVolume) >> 7)) & ~1;
+  int echoR = clamp16(echoOutR + clip16((sumR * feedbackVolume) >> 7)) & ~1;
+  // write it to ram
+  if (echoWrites) {
+    aram_[adr] = echoL & 0xff;
+    aram_[(adr + 1) & 0xffff] = echoL >> 8;
+    aram_[(adr + 2) & 0xffff] = echoR & 0xff;
+    aram_[(adr + 3) & 0xffff] = echoR >> 8;
+  }
+  // handle indexes
+  if (echoBufferIndex == 0) {
+    echoLength = echoDelay * 4;
+  }
+  echoBufferIndex += 4;
+  if (echoBufferIndex >= echoLength) {
+    echoBufferIndex = 0;
+  }
+}
+
+void Dsp::CycleChannel(int ch) {
+  // handle pitch counter
+  int pitch = channel[ch].pitch;
+  if (ch > 0 && channel[ch].pitchModulation) {
+    pitch += ((channel[ch - 1].sampleOut >> 5) * pitch) >> 10;
+  }
+  // get current brr header and get sample address
+  channel[ch].brrHeader = aram_[channel[ch].decodeOffset];
+  uint16_t samplePointer = dirPage + 4 * channel[ch].srcn;
+  if (channel[ch].startDelay == 0) samplePointer += 2;
+  uint16_t sampleAdr =
+      aram_[samplePointer] | (aram_[(samplePointer + 1) & 0xffff] << 8);
+  // handle starting of sample
+  if (channel[ch].startDelay > 0) {
+    if (channel[ch].startDelay == 5) {
+      // first keyed on
+      channel[ch].decodeOffset = sampleAdr;
+      channel[ch].blockOffset = 1;
+      channel[ch].bufferOffset = 0;
+      channel[ch].brrHeader = 0;
+      ram[0x7c] &= ~(1 << ch);  // clear ENDx
+    }
+    channel[ch].gain = 0;
+    channel[ch].startDelay--;
+    channel[ch].pitchCounter = 0;
+    if (channel[ch].startDelay > 0 && channel[ch].startDelay < 4) {
+      channel[ch].pitchCounter = 0x4000;
+    }
+    pitch = 0;
+  }
+  // get sample
+  int sample = 0;
+  if (channel[ch].useNoise) {
+    sample = clip16(noiseSample * 2);
+  } else {
+    sample = GetSample(ch);
+  }
+  sample = ((sample * channel[ch].gain) >> 11) & ~1;
+  // handle reset and release
+  if (reset || (channel[ch].brrHeader & 0x03) == 1) {
+    channel[ch].adsrState = 3;  // go to release
+    channel[ch].gain = 0;
+  }
+  // handle keyon/keyoff
+  if (evenCycle) {
+    if (channel[ch].keyOff) {
+      channel[ch].adsrState = 3;  // go to release
+    }
+    if (channel[ch].keyOn) {
+      channel[ch].startDelay = 5;
+      channel[ch].adsrState = 0;  // go to attack
+      channel[ch].keyOn = false;
+    }
+  }
+  // handle envelope
+  if (channel[ch].startDelay == 0) {
+    HandleGain(ch);
+  }
+  // decode new brr samples if needed and update offsets
+  if (channel[ch].pitchCounter >= 0x4000) {
+    DecodeBrr(ch);
+    if (channel[ch].blockOffset >= 7) {
+      if (channel[ch].brrHeader & 0x1) {
+        channel[ch].decodeOffset = sampleAdr;
+        ram[0x7c] |= 1 << ch;  // set ENDx
+      } else {
+        channel[ch].decodeOffset += 9;
+      }
+      channel[ch].blockOffset = 1;
+    } else {
+      channel[ch].blockOffset += 2;
+    }
+  }
+  // update pitch counter
+  channel[ch].pitchCounter &= 0x3fff;
+  channel[ch].pitchCounter += pitch;
+  if (channel[ch].pitchCounter > 0x7fff) channel[ch].pitchCounter = 0x7fff;
+  // set outputs
+  ram[(ch << 4) | 8] = channel[ch].gain >> 4;
+  ram[(ch << 4) | 9] = sample >> 8;
+  channel[ch].sampleOut = sample;
+  sampleOutL = clamp16(sampleOutL + ((sample * channel[ch].volumeL) >> 7));
+  sampleOutR = clamp16(sampleOutR + ((sample * channel[ch].volumeR) >> 7));
+  if (channel[ch].echoEnable) {
+    echoOutL = clamp16(echoOutL + ((sample * channel[ch].volumeL) >> 7));
+    echoOutR = clamp16(echoOutR + ((sample * channel[ch].volumeR) >> 7));
+  }
+}
+
+void Dsp::HandleGain(int ch) {
+  int newGain = channel[ch].gain;
+  int rate = 0;
+  // handle gain mode
+  if (channel[ch].adsrState == 3) {  // release
+    rate = 31;
+    newGain -= 8;
+  } else {
+    if (!channel[ch].useGain) {
+      rate = channel[ch].adsrRates[channel[ch].adsrState];
+      switch (channel[ch].adsrState) {
+        case 0:
+          newGain += rate == 31 ? 1024 : 32;
+          break;  // attack
+        case 1:
+          newGain -= ((newGain - 1) >> 8) + 1;
+          break;  // decay
+        case 2:
+          newGain -= ((newGain - 1) >> 8) + 1;
+          break;  // sustain
+      }
+    } else {
+      if (!channel[ch].directGain) {
+        rate = channel[ch].adsrRates[3];
+        switch (channel[ch].gainMode) {
+          case 0:
+            newGain -= 32;
+            break;  // linear decrease
+          case 1:
+            newGain -= ((newGain - 1) >> 8) + 1;
+            break;  // exponential decrease
+          case 2:
+            newGain += 32;
+            break;  // linear increase
+          case 3:
+            newGain += (channel[ch].preclampGain < 0x600) ? 32 : 8;
+            break;  // bent increase
+        }
+      } else {  // direct gain
+        rate = 31;
+        newGain = channel[ch].gainValue;
+      }
+    }
+  }
+  // use sustain level according to mode
+  int sustainLevel = channel[ch].useGain ? channel[ch].gainSustainLevel
+                                         : channel[ch].sustainLevel;
+  if (channel[ch].adsrState == 1 && (newGain >> 8) == sustainLevel) {
+    channel[ch].adsrState = 2;  // go to sustain
+  }
+  // store pre-clamped gain (for bent increase)
+  channel[ch].preclampGain = newGain & 0xffff;
+  // clamp gain
+  if (newGain < 0 || newGain > 0x7ff) {
+    newGain = newGain < 0 ? 0 : 0x7ff;
+    if (channel[ch].adsrState == 0) {
+      channel[ch].adsrState = 1;  // go to decay
+    }
+  }
+  // store new value
+  if (CheckCounter(rate)) channel[ch].gain = newGain;
+}
+
+int16_t Dsp::GetSample(int ch) {
+  int pos = (channel[ch].pitchCounter >> 12) + channel[ch].bufferOffset;
+  int offset = (channel[ch].pitchCounter >> 4) & 0xff;
+  int16_t news = channel[ch].decodeBuffer[(pos + 3) % 12];
+  int16_t olds = channel[ch].decodeBuffer[(pos + 2) % 12];
+  int16_t olders = channel[ch].decodeBuffer[(pos + 1) % 12];
+  int16_t oldests = channel[ch].decodeBuffer[pos % 12];
+  int out = (gaussValues[0xff - offset] * oldests) >> 11;
+  out += (gaussValues[0x1ff - offset] * olders) >> 11;
+  out += (gaussValues[0x100 + offset] * olds) >> 11;
+  out = clip16(out) + ((gaussValues[offset] * news) >> 11);
+  return clamp16(out) & ~1;
+}
+
+void Dsp::DecodeBrr(int ch) {
+  int shift = channel[ch].brrHeader >> 4;
+  int filter = (channel[ch].brrHeader & 0xc) >> 2;
+  int bOff = channel[ch].bufferOffset;
+  int old = channel[ch].decodeBuffer[bOff == 0 ? 11 : bOff - 1] >> 1;
+  int older = channel[ch].decodeBuffer[bOff == 0 ? 10 : bOff - 2] >> 1;
+  uint8_t curByte = 0;
+  for (int i = 0; i < 4; i++) {
+    int s = 0;
+    if (i & 1) {
+      s = curByte & 0xf;
+    } else {
+      curByte = aram_[(channel[ch].decodeOffset + channel[ch].blockOffset +
+                       (i >> 1)) &
+                      0xffff];
+      s = curByte >> 4;
+    }
+    if (s > 7) s -= 16;
+    if (shift <= 0xc) {
+      s = (s << shift) >> 1;
+    } else {
+      s = (s >> 3) << 12;
+    }
+    switch (filter) {
+      case 1:
+        s += old + (-old >> 4);
+        break;
+      case 2:
+        s += 2 * old + ((3 * -old) >> 5) - older + (older >> 4);
+        break;
+      case 3:
+        s += 2 * old + ((13 * -old) >> 6) - older + ((3 * older) >> 4);
+        break;
+    }
+    channel[ch].decodeBuffer[bOff + i] = clamp16(s) * 2;  // cuts off bit 15
+    older = old;
+    old = channel[ch].decodeBuffer[bOff + i] >> 1;
+  }
+  channel[ch].bufferOffset += 4;
+  if (channel[ch].bufferOffset >= 12) channel[ch].bufferOffset = 0;
+}
+
+void Dsp::HandleNoise() {
+  if (CheckCounter(noiseRate)) {
+    int bit = (noiseSample & 1) ^ ((noiseSample >> 1) & 1);
+    noiseSample = ((noiseSample >> 1) & 0x3fff) | (bit << 14);
+  }
+}
+
+uint8_t Dsp::Read(uint8_t adr) { return ram[adr]; }
+
+void Dsp::Write(uint8_t adr, uint8_t val) {
+  int ch = adr >> 4;
+  switch (adr) {
+    case 0x00:
+    case 0x10:
+    case 0x20:
+    case 0x30:
+    case 0x40:
+    case 0x50:
+    case 0x60:
+    case 0x70: {
+      channel[ch].volumeL = val;
+      break;
+    }
+    case 0x01:
+    case 0x11:
+    case 0x21:
+    case 0x31:
+    case 0x41:
+    case 0x51:
+    case 0x61:
+    case 0x71: {
+      channel[ch].volumeR = val;
+      break;
+    }
+    case 0x02:
+    case 0x12:
+    case 0x22:
+    case 0x32:
+    case 0x42:
+    case 0x52:
+    case 0x62:
+    case 0x72: {
+      channel[ch].pitch = (channel[ch].pitch & 0x3f00) | val;
+      break;
+    }
+    case 0x03:
+    case 0x13:
+    case 0x23:
+    case 0x33:
+    case 0x43:
+    case 0x53:
+    case 0x63:
+    case 0x73: {
+      channel[ch].pitch = ((channel[ch].pitch & 0x00ff) | (val << 8)) & 0x3fff;
+      break;
+    }
+    case 0x04:
+    case 0x14:
+    case 0x24:
+    case 0x34:
+    case 0x44:
+    case 0x54:
+    case 0x64:
+    case 0x74: {
+      channel[ch].srcn = val;
+      break;
+    }
+    case 0x05:
+    case 0x15:
+    case 0x25:
+    case 0x35:
+    case 0x45:
+    case 0x55:
+    case 0x65:
+    case 0x75: {
+      channel[ch].adsrRates[0] = (val & 0xf) * 2 + 1;
+      channel[ch].adsrRates[1] = ((val & 0x70) >> 4) * 2 + 16;
+      channel[ch].useGain = (val & 0x80) == 0;
+      break;
+    }
+    case 0x06:
+    case 0x16:
+    case 0x26:
+    case 0x36:
+    case 0x46:
+    case 0x56:
+    case 0x66:
+    case 0x76: {
+      channel[ch].adsrRates[2] = val & 0x1f;
+      channel[ch].sustainLevel = (val & 0xe0) >> 5;
+      break;
+    }
+    case 0x07:
+    case 0x17:
+    case 0x27:
+    case 0x37:
+    case 0x47:
+    case 0x57:
+    case 0x67:
+    case 0x77: {
+      channel[ch].directGain = (val & 0x80) == 0;
+      channel[ch].gainMode = (val & 0x60) >> 5;
+      channel[ch].adsrRates[3] = val & 0x1f;
+      channel[ch].gainValue = (val & 0x7f) * 16;
+      channel[ch].gainSustainLevel = (val & 0xe0) >> 5;
+      break;
+    }
+    case 0x0c: {
+      masterVolumeL = val;
+      break;
+    }
+    case 0x1c: {
+      masterVolumeR = val;
+      break;
+    }
+    case 0x2c: {
+      echoVolumeL = val;
+      break;
+    }
+    case 0x3c: {
+      echoVolumeR = val;
+      break;
+    }
+    case 0x4c: {
+      for (int i = 0; i < 8; i++) {
+        channel[i].keyOn = val & (1 << i);
+      }
+      break;
+    }
+    case 0x5c: {
+      for (int i = 0; i < 8; i++) {
+        channel[i].keyOff = val & (1 << i);
+      }
+      break;
+    }
+    case 0x6c: {
+      reset = val & 0x80;
+      mute = val & 0x40;
+      echoWrites = (val & 0x20) == 0;
+      noiseRate = val & 0x1f;
+      break;
+    }
+    case 0x7c: {
+      val = 0;  // any write clears ENDx
+      break;
+    }
+    case 0x0d: {
+      feedbackVolume = val;
+      break;
+    }
+    case 0x2d: {
+      for (int i = 0; i < 8; i++) {
+        channel[i].pitchModulation = val & (1 << i);
+      }
+      break;
+    }
+    case 0x3d: {
+      for (int i = 0; i < 8; i++) {
+        channel[i].useNoise = val & (1 << i);
+      }
+      break;
+    }
+    case 0x4d: {
+      for (int i = 0; i < 8; i++) {
+        channel[i].echoEnable = val & (1 << i);
+      }
+      break;
+    }
+    case 0x5d: {
+      dirPage = val << 8;
+      break;
+    }
+    case 0x6d: {
+      echoBufferAdr = val << 8;
+      break;
+    }
+    case 0x7d: {
+      echoDelay =
+          (val & 0xf) * 512;  // 2048-byte steps, stereo sample is 4 bytes
+      break;
+    }
+    case 0x0f:
+    case 0x1f:
+    case 0x2f:
+    case 0x3f:
+    case 0x4f:
+    case 0x5f:
+    case 0x6f:
+    case 0x7f: {
+      firValues[ch] = val;
+      break;
+    }
+  }
+  ram[adr] = val;
+}
+
+void Dsp::GetSamples(int16_t* sample_data, int samples_per_frame,
+                     bool pal_timing) {
+  // resample from 534 / 641 samples per frame to wanted value
+  float wantedSamples = (pal_timing ? 641.0 : 534.0);
+  double adder = wantedSamples / samples_per_frame;
+  double location = lastFrameBoundary - wantedSamples;
+  for (int i = 0; i < samples_per_frame; i++) {
+    sample_data[i * 2] = sample_buffer_[(((int)location) & 0x3ff) * 2];
+    sample_data[i * 2 + 1] = sample_buffer_[(((int)location) & 0x3ff) * 2 + 1];
+    location += adder;
+  }
+}
+
+}  // namespace audio
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze

src/app/emu/audio/dsp.h

@@ -0,0 +1,163 @@
+#ifndef YAZE_APP_EMU_AUDIO_S_DSP_H
+#define YAZE_APP_EMU_AUDIO_S_DSP_H
+
+#include <cstdint>
+#include <functional>
+#include <vector>
+
+#include "app/emu/audio/spc700.h"
+#include "app/emu/memory/memory.h"
+
+namespace yaze {
+namespace app {
+namespace emu {
+namespace audio {
+
+typedef struct DspChannel {
+  // pitch
+  uint16_t pitch;
+  uint16_t pitchCounter;
+  bool pitchModulation;
+  // brr decoding
+  int16_t decodeBuffer[12];
+  uint8_t bufferOffset;
+  uint8_t srcn;
+  uint16_t decodeOffset;
+  uint8_t blockOffset;  // offset within brr block
+  uint8_t brrHeader;
+  bool useNoise;
+  uint8_t startDelay;
+  // adsr, envelope, gain
+  uint8_t adsrRates[4];  // attack, decay, sustain, gain
+  uint8_t adsrState;     // 0: attack, 1: decay, 2: sustain, 3: release
+  uint8_t sustainLevel;
+  uint8_t gainSustainLevel;
+  bool useGain;
+  uint8_t gainMode;
+  bool directGain;
+  uint16_t gainValue;     // for direct gain
+  uint16_t preclampGain;  // for bent increase
+  uint16_t gain;
+  // keyon/off
+  bool keyOn;
+  bool keyOff;
+  // output
+  int16_t sampleOut;  // final sample, to be multiplied by channel volume
+  int8_t volumeL;
+  int8_t volumeR;
+  bool echoEnable;
+} DspChannel;
+
+/**
+ * The S-DSP is a digital signal processor generating the sound data.
+ *
+ * A DSP register can be selected with $F2, after which it can be read or
+ * written at $F3. Often it is useful to load the register address into A, and
+ * the value to send in Y, so that MOV $F2, YA can be used to do both in one
+ * 16-bit instruction.
+ *
+ * The DSP register address space only has 7 bits. The high bit of $F2, if set,
+ * will make the selected register read-only via $F3.
+ *
+ * When initializing the DSP registers for the first time, take care not to
+ * accidentally enable echo writeback via FLG, because it will immediately begin
+ * overwriting values in RAM.
+ *
+ * Voices
+ * There are 8 voices, numbered 0 to 7.
+ * Each voice X has 10 registers in the range $X0-$X9.
+ *
+ * | Name    | Address | Bits      | Notes |
+ * |---------|---------|-----------|--------------------------------------------------------|
+ * | VOL (L) | $X0     | SVVV VVVV | Left channel volume, signed. | | VOL (R) |
+ * $X1     | SVVV VVVV | Right channel volume, signed. | | P (L)   | $X2     |
+ * LLLL LLLL | Low 8 bits of sample pitch.                            | | P (H)
+ * | $X3     | --HH HHHH | High 6 bits of sample pitch. | | SCRN    | $X4     |
+ * SSSS SSSS | Selects a sample source entry from the directory.      | | ADSR
+ * (1)| $X5     | EDDD AAAA | ADSR enable (E), decay rate (D), attack rate (A).
+ * | | ADSR (2)| $X6     | SSSR RRRR | Sustain level (S), release rate (R). | |
+ * GAIN    | $X7     | 0VVV VVVV 1MMV VVVV | Mode (M), value (V). | | ENVX    |
+ * $X8     | 0VVV VVVV | Reads current 7-bit value of ADSR/GAIN envelope. | |
+ * OUTX    | $X9     | SVVV VVVV | Reads signed 8-bit value of current sample
+ * wave        | |         |         |           | multiplied by ENVX, before
+ * applying VOL.               |
+ */
+
+class Dsp {
+ public:
+  Dsp(std::vector<uint8_t>& aram) : aram_(aram) {}
+
+  void NewFrame();
+
+  void Reset();
+
+  void Cycle();
+
+  void HandleEcho();
+  void CycleChannel(int ch);
+
+  void HandleNoise();
+  void HandleGain(int ch);
+
+  bool CheckCounter(int rate);
+
+  void DecodeBrr(int ch);
+
+  uint8_t Read(uint8_t adr);
+  void Write(uint8_t adr, uint8_t val);
+
+  int16_t GetSample(int ch);
+
+  void GetSamples(int16_t* sample_data, int samples_per_frame, bool pal_timing);
+
+ private:
+  int16_t sample_buffer_[0x400 * 2];  // (1024 samples, *2 for stereo)
+  int16_t sample_offset_;             // current offset in samplebuffer
+
+  std::vector<uint8_t>& aram_;
+
+  // mirror ram
+  uint8_t ram[0x80];
+  // 8 channels
+  DspChannel channel[8];
+  // overarching
+  uint16_t counter;
+  uint16_t dirPage;
+  bool evenCycle;
+  bool mute;
+  bool reset;
+  int8_t masterVolumeL;
+  int8_t masterVolumeR;
+  // accumulation
+  int16_t sampleOutL;
+  int16_t sampleOutR;
+  int16_t echoOutL;
+  int16_t echoOutR;
+  // noise
+  int16_t noiseSample;
+  uint8_t noiseRate;
+  // echo
+  bool echoWrites;
+  int8_t echoVolumeL;
+  int8_t echoVolumeR;
+  int8_t feedbackVolume;
+  uint16_t echoBufferAdr;
+  uint16_t echoDelay;
+  uint16_t echoLength;
+  uint16_t echoBufferIndex;
+  uint8_t firBufferIndex;
+  int8_t firValues[8];
+  int16_t firBufferL[8];
+  int16_t firBufferR[8];
+  // sample ring buffer (1024 samples, *2 for stereo)
+  int16_t sampleBuffer[0x400 * 2];
+  uint16_t sampleOffset;  // current offset in samplebuffer
+  uint32_t lastFrameBoundary;
+};
+
+}  // namespace audio
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EMU_AUDIO_S_DSP_H

src/app/emu/audio/internal/addressing.cc

@@ -0,0 +1,152 @@
+#include "app/emu/audio/spc700.h"
+
+namespace yaze {
+namespace app {
+namespace emu {
+namespace audio {
+
+// adressing modes
+
+uint16_t Spc700::ind() {
+  read(PC);
+  return X | (PSW.P << 8);
+}
+
+uint16_t Spc700::idx() {
+  uint8_t pointer = ReadOpcode();
+  callbacks_.idle(false);
+  return read_word(((pointer + X) & 0xff) | (PSW.P << 8));
+}
+
+uint16_t Spc700::dpx() {
+  uint16_t res = ((ReadOpcode() + X) & 0xff) | (PSW.P << 8);
+  callbacks_.idle(false);
+  return res;
+}
+
+uint16_t Spc700::dp_y() {
+  uint16_t res = ((ReadOpcode() + Y) & 0xff) | (PSW.P << 8);
+  callbacks_.idle(false);
+  return res;
+}
+
+uint16_t Spc700::abs_x() {
+  uint16_t res = (ReadOpcodeWord() + X) & 0xffff;
+  callbacks_.idle(false);
+  return res;
+}
+
+uint16_t Spc700::abs_y() {
+  uint16_t res = (ReadOpcodeWord() + Y) & 0xffff;
+  callbacks_.idle(false);
+  return res;
+}
+
+uint16_t Spc700::idy() {
+  uint8_t pointer = ReadOpcode();
+  uint16_t adr = read_word(pointer | (PSW.P << 8));
+  callbacks_.idle(false);
+  return (adr + Y) & 0xffff;
+}
+
+uint16_t Spc700::dp_imm(uint8_t* srcVal) {
+  *srcVal = ReadOpcode();
+  return ReadOpcode() | (PSW.P << 8);
+}
+
+uint16_t Spc700::ind_ind(uint8_t* srcVal) {
+  read(PC);
+  *srcVal = read(Y | (PSW.P << 8));
+  return X | (PSW.P << 8);
+}
+
+uint8_t Spc700::abs_bit(uint16_t* adr) {
+  uint16_t adrBit = ReadOpcodeWord();
+  *adr = adrBit & 0x1fff;
+  return adrBit >> 13;
+}
+
+uint16_t Spc700::dp_word(uint16_t* low) {
+  uint8_t adr = ReadOpcode();
+  *low = adr | (PSW.P << 8);
+  return ((adr + 1) & 0xff) | (PSW.P << 8);
+}
+
+uint16_t Spc700::ind_p() {
+  read(PC);
+  return X++ | (PSW.P << 8);
+}
+
+// Immediate
+uint16_t Spc700::imm() { return PC++; }
+
+// Direct page
+uint8_t Spc700::dp() {
+  return ReadOpcode() | (PSW.P << 8);
+}
+
+// Direct page indexed by X
+uint8_t Spc700::dp_plus_x() {
+  PC++;
+  uint8_t offset = read(PC);
+  return read((PSW.P << 8) + offset + X);
+}
+
+// Direct page indexed by Y
+uint8_t Spc700::dp_plus_y() {
+  PC++;
+  uint8_t offset = read(PC);
+  return read((PSW.P << 8) + offset + Y);
+}
+
+// Indexed indirect (add index before 16-bit lookup).
+uint16_t Spc700::dp_plus_x_indirect() {
+  PC++;
+  uint16_t addr = read_word(PC + X);
+  return addr;
+}
+
+// Indirect indexed (add index after 16-bit lookup).
+uint16_t Spc700::dp_indirect_plus_y() {
+  PC++;
+  uint16_t offset = read_word(PC);
+  return offset + Y;
+}
+
+uint16_t Spc700::dp_dp(uint8_t* src) {
+  *src = read(ReadOpcode() | (PSW.P << 8));
+  return ReadOpcode() | (PSW.P << 8);
+}
+
+uint16_t Spc700::abs() { return ReadOpcodeWord(); }
+
+int8_t Spc700::rel() {
+  PC++;
+  return static_cast<int8_t>(read(PC));
+}
+
+uint8_t Spc700::i() { return read((PSW.P << 8) + X); }
+
+uint8_t Spc700::i_postinc() {
+  uint8_t value = read((PSW.P << 8) + X);
+  X++;
+  return value;
+}
+
+uint16_t Spc700::addr_plus_i() {
+  PC++;
+  uint16_t addr = read(PC) | (read(PC) << 8);
+  return read(addr) + X;
+}
+
+uint16_t Spc700::addr_plus_i_indexed() {
+  PC++;
+  uint16_t addr = read(PC) | (read(PC) << 8);
+  addr += X;
+  return read(addr) | (read(addr + 1) << 8);
+}
+
+}  // namespace audio
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze

src/app/emu/audio/internal/instructions.cc

@@ -0,0 +1,487 @@
+#include "app/emu/audio/spc700.h"
+
+namespace yaze {
+namespace app {
+namespace emu {
+namespace audio {
+
+// opcode functions
+
+void Spc700::MOVX(uint16_t adr) {
+  X = read(adr);
+  PSW.Z = (X == 0);
+  PSW.N = (X & 0x80);
+}
+
+void Spc700::MOVY(uint16_t adr) {
+  Y = read(adr);
+  PSW.Z = (Y == 0);
+  PSW.N = (Y & 0x80);
+}
+
+void Spc700::MOVS(uint16_t adr) {
+  switch (bstep) {
+    case 0: read(adr); break;
+    case 1: write(adr, A); bstep = 0; break;
+  }
+}
+
+void Spc700::MOVSX(uint16_t adr) {
+  switch (bstep) {
+    case 0: read(adr); break;
+    case 1: write(adr, X); bstep = 0; break;
+  }
+}
+
+void Spc700::MOVSY(uint16_t adr) {
+  switch (bstep) {
+    case 0: read(adr); break;
+    case 1: write(adr, Y); bstep = 0; break;
+  }
+}
+
+void Spc700::MOV(uint16_t adr) {
+  A = read(adr);
+  PSW.Z = (A == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::MOV_ADDR(uint16_t address, uint8_t operand) {
+  write(address, operand);
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x80);
+}
+
+void Spc700::ADC(uint16_t adr) {
+  uint8_t value = read(adr);
+  uint16_t result = A + value + PSW.C;
+  PSW.V = ((A ^ result) & (adr ^ result) & 0x80);
+  PSW.C = (result > 0xFF);
+  PSW.H = ((A ^ adr ^ result) & 0x10);
+  A = result & 0xFF;
+  PSW.Z = ((A & 0xFF) == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::ADCM(uint16_t& dest, uint8_t operand) {
+  uint8_t applyOn = read(dest);
+  int result = applyOn + operand + PSW.C;
+  PSW.V = (applyOn & 0x80) == (operand & 0x80) &&
+          (operand & 0x80) != (result & 0x80);
+  PSW.H = ((applyOn & 0xf) + (operand & 0xf) + PSW.C) > 0xf;
+  PSW.C = result > 0xff;
+  write(dest, result);
+  PSW.Z = ((result & 0xFF) == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::SBC(uint16_t adr) {
+  uint8_t value = read(adr) ^ 0xff;
+  int result = A + value + PSW.C;
+  PSW.V = (A & 0x80) == (value & 0x80) && (value & 0x80) != (result & 0x80);
+  PSW.H = ((A & 0xf) + (value & 0xf) + PSW.C) > 0xf;
+  PSW.C = result > 0xff;
+  A = result;
+  PSW.Z = ((A & 0xFF) == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::SBCM(uint16_t& dest, uint8_t operand) {
+  operand ^= 0xff;
+  uint8_t applyOn = read(dest);
+  int result = applyOn + operand + PSW.C;
+  PSW.V = (applyOn & 0x80) == (operand & 0x80) &&
+          (operand & 0x80) != (operand & 0x80);
+  PSW.H = ((applyOn & 0xF) + (operand & 0xF) + PSW.C) > 0xF;
+  PSW.C = result > 0xFF;
+  write(dest, result);
+  PSW.Z = ((A & 0xFF) == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::CMPX(uint16_t adr) {
+  uint8_t value = read(adr) ^ 0xff;
+  int result = X + value + 1;
+  PSW.C = result > 0xff;
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::CMPY(uint16_t adr) {
+  uint8_t value = read(adr) ^ 0xff;
+  int result = Y + value + 1;
+  PSW.C = result > 0xff;
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::CMPM(uint16_t dst, uint8_t value) {
+  value ^= 0xff;
+  int result = read(dst) + value + 1;
+  PSW.C = result > 0xff;
+  callbacks_.idle(false);
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::CMP(uint16_t adr) {
+  uint8_t value = read(adr) ^ 0xff;
+  int result = A + value + 1;
+  PSW.C = result > 0xff;
+  PSW.Z = ((result & 0xFF) == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::AND(uint16_t adr) {
+  A &= read(adr);
+  PSW.Z = (A == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::ANDM(uint16_t dest, uint8_t operand) {
+  uint8_t result = read(dest) & operand;
+  write(dest, result);
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::OR(uint16_t adr) {
+  A |= read(adr);
+  PSW.Z = (A == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::ORM(uint16_t dst, uint8_t value) {
+  uint8_t result = read(dst) | value;
+  write(dst, result);
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::EOR(uint16_t adr) {
+  A ^= read(adr);
+  PSW.Z = (A == 0);
+  PSW.N = (A & 0x80);
+}
+
+void Spc700::EORM(uint16_t dest, uint8_t operand) {
+  uint8_t result = read(dest) ^ operand;
+  write(dest, result);
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x80);
+}
+
+void Spc700::ASL(uint16_t operand) {
+  uint8_t val = read(operand);
+  write(operand, val);
+  PSW.C = (val & 0x80);
+  val <<= 1;
+  PSW.Z = (val == 0);
+  PSW.N = (val & 0x80);
+}
+
+void Spc700::LSR(uint16_t adr) {
+  uint8_t val = read(adr);
+  PSW.C = (val & 0x01);
+  val >>= 1;
+  write(adr, val);
+  PSW.Z = (val == 0);
+  PSW.N = (val & 0x80);
+}
+
+void Spc700::ROR(uint16_t adr) {
+  uint8_t val = read(adr);
+  bool newC = val & 1;
+  val = (val >> 1) | (PSW.C << 7);
+  PSW.C = newC;
+  write(adr, val);
+  PSW.Z = (val == 0);
+  PSW.N = (val & 0x80);
+}
+
+void Spc700::ROL(uint16_t adr) {
+  uint8_t val = read(adr);
+  bool newC = val & 0x80;
+  val = (val << 1) | PSW.C;
+  PSW.C = newC;
+  write(adr, val);
+
+  PSW.Z = (val == 0);
+  PSW.N = (val & 0x80);
+}
+
+void Spc700::XCN(uint8_t operand, bool isImmediate) {
+  uint8_t value = isImmediate ? imm() : operand;
+  value = ((value & 0xF0) >> 4) | ((value & 0x0F) << 4);
+  PSW.Z = (value == 0);
+  PSW.N = (value & 0x80);
+  // operand = value;
+}
+
+void Spc700::INC(uint16_t adr) {
+  uint8_t val = read(adr) + 1;
+  write(adr, val);
+  PSW.Z = (val == 0);
+  PSW.N = (val & 0x80);
+}
+
+void Spc700::DEC(uint16_t operand) {
+  uint8_t val = read(operand) - 1;
+  write(operand, val);
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x80);
+}
+
+void Spc700::MOVW(uint16_t& dest, uint16_t operand) {
+  dest = operand;
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x8000);
+}
+
+void Spc700::INCW(uint16_t& operand) {
+  operand++;
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x8000);
+}
+
+void Spc700::DECW(uint16_t& operand) {
+  operand--;
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x8000);
+}
+
+void Spc700::ADDW(uint16_t& dest, uint16_t operand) {
+  uint32_t result = dest + operand;
+  PSW.C = (result > 0xFFFF);
+  PSW.Z = ((result & 0xFFFF) == 0);
+  PSW.N = (result & 0x8000);
+  PSW.V = ((dest ^ result) & (operand ^ result) & 0x8000);
+  dest = result & 0xFFFF;
+}
+
+void Spc700::SUBW(uint16_t& dest, uint16_t operand) {
+  uint32_t result = dest - operand;
+  PSW.C = (result < 0x10000);
+  PSW.Z = ((result & 0xFFFF) == 0);
+  PSW.N = (result & 0x8000);
+  PSW.V = ((dest ^ result) & (dest ^ operand) & 0x8000);
+  dest = result & 0xFFFF;
+}
+
+void Spc700::CMPW(uint16_t operand) {
+  uint32_t result = YA - operand;
+  PSW.C = (result < 0x10000);
+  PSW.Z = ((result & 0xFFFF) == 0);
+  PSW.N = (result & 0x8000);
+}
+
+void Spc700::MUL(uint8_t operand) {
+  uint16_t result = A * operand;
+  YA = result;
+  PSW.Z = (result == 0);
+  PSW.N = (result & 0x8000);
+}
+
+void Spc700::DIV(uint8_t operand) {
+  if (operand == 0) {
+    // Handle divide by zero error
+    return;
+  }
+  uint8_t quotient = A / operand;
+  uint8_t remainder = A % operand;
+  A = quotient;
+  Y = remainder;
+  PSW.Z = (quotient == 0);
+  PSW.N = (quotient & 0x80);
+}
+
+void Spc700::BRA(int8_t offset) { PC += offset; }
+
+void Spc700::BEQ(int8_t offset) {
+  if (PSW.Z) {
+    PC += offset;
+  }
+}
+
+void Spc700::BNE(int8_t offset) {
+  if (!PSW.Z) {
+    PC += offset;
+  }
+}
+
+void Spc700::BCS(int8_t offset) {
+  if (PSW.C) {
+    PC += offset;
+  }
+}
+
+void Spc700::BCC(int8_t offset) {
+  if (!PSW.C) {
+    PC += offset;
+  }
+}
+
+void Spc700::BVS(int8_t offset) {
+  if (PSW.V) {
+    PC += offset;
+  }
+}
+
+void Spc700::BVC(int8_t offset) {
+  if (!PSW.V) {
+    PC += offset;
+  }
+}
+
+void Spc700::BMI(int8_t offset) {
+  if (PSW.N) {
+    PC += offset;
+  }
+}
+
+void Spc700::BPL(int8_t offset) {
+  if (!PSW.N) {
+    PC += offset;
+  }
+}
+
+void Spc700::BBS(uint8_t bit, uint8_t operand) {
+  if (operand & (1 << bit)) {
+    PC += rel();
+  }
+}
+
+void Spc700::BBC(uint8_t bit, uint8_t operand) {
+  if (!(operand & (1 << bit))) {
+    PC += rel();
+  }
+}
+
+// CBNE DBNZ
+// JMP
+void Spc700::JMP(uint16_t address) { PC = address; }
+
+void Spc700::CALL(uint16_t address) {
+  uint16_t return_address = PC + 2;
+  write(SP, return_address & 0xFF);
+  write(SP - 1, (return_address >> 8) & 0xFF);
+  SP -= 2;
+  PC = address;
+}
+
+void Spc700::PCALL(uint8_t offset) {
+  uint16_t return_address = PC + 2;
+  write(SP, return_address & 0xFF);
+  write(SP - 1, (return_address >> 8) & 0xFF);
+  SP -= 2;
+  PC += offset;
+}
+
+void Spc700::TCALL(uint8_t offset) {
+  uint16_t return_address = PC + 2;
+  write(SP, return_address & 0xFF);
+  write(SP - 1, (return_address >> 8) & 0xFF);
+  SP -= 2;
+  PC = 0xFFDE + offset;
+}
+
+void Spc700::BRK() {
+  uint16_t return_address = PC + 2;
+  write(SP, return_address & 0xFF);
+  write(SP - 1, (return_address >> 8) & 0xFF);
+  SP -= 2;
+  PC = 0xFFDE;
+}
+
+void Spc700::RET() {
+  uint16_t return_address = read(SP) | (read(SP + 1) << 8);
+  SP += 2;
+  PC = return_address;
+}
+
+void Spc700::RETI() {
+  uint16_t return_address = read(SP) | (read(SP + 1) << 8);
+  SP += 2;
+  PC = return_address;
+  PSW.I = 1;
+}
+
+void Spc700::PUSH(uint8_t operand) {
+  write(SP, operand);
+  SP--;
+}
+
+void Spc700::POP(uint8_t& operand) {
+  SP++;
+  operand = read(SP);
+}
+
+void Spc700::SET1(uint8_t bit, uint8_t& operand) { operand |= (1 << bit); }
+
+void Spc700::CLR1(uint8_t bit, uint8_t& operand) { operand &= ~(1 << bit); }
+
+void Spc700::TSET1(uint8_t bit, uint8_t& operand) {
+  PSW.C = (operand & (1 << bit));
+  operand |= (1 << bit);
+}
+
+void Spc700::TCLR1(uint8_t bit, uint8_t& operand) {
+  PSW.C = (operand & (1 << bit));
+  operand &= ~(1 << bit);
+}
+
+void Spc700::AND1(uint8_t bit, uint8_t& operand) {
+  operand &= (1 << bit);
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x80);
+}
+
+void Spc700::OR1(uint8_t bit, uint8_t& operand) {
+  operand |= (1 << bit);
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x80);
+}
+
+void Spc700::EOR1(uint8_t bit, uint8_t& operand) {
+  operand ^= (1 << bit);
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x80);
+}
+
+void Spc700::NOT1(uint8_t bit, uint8_t& operand) {
+  operand ^= (1 << bit);
+  PSW.Z = (operand == 0);
+  PSW.N = (operand & 0x80);
+}
+
+void Spc700::MOV1(uint8_t bit, uint8_t& operand) {
+  PSW.C = (operand & (1 << bit));
+  operand |= (1 << bit);
+}
+
+void Spc700::CLRC() { PSW.C = 0; }
+
+void Spc700::SETC() { PSW.C = 1; }
+
+void Spc700::NOTC() { PSW.C = !PSW.C; }
+
+void Spc700::CLRV() { PSW.V = 0; }
+
+void Spc700::CLRP() { PSW.P = 0; }
+
+void Spc700::SETP() { PSW.P = 1; }
+
+void Spc700::EI() { PSW.I = 1; }
+
+void Spc700::DI() { PSW.I = 0; }
+
+void Spc700::NOP() { PC++; }
+
+void Spc700::SLEEP() {}
+
+void Spc700::STOP() {}
+
+}  // namespace audio
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze

src/app/emu/audio/internal/opcodes.h

@@ -0,0 +1,263 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <unordered_map>
+
+const std::unordered_map<uint8_t, std::string> spc_opcode_map = {
+    {0x00, "NOP"},
+    {0x01, "TCALL0"},
+    {0x02, "SET1 direct.0"},
+    {0x03, "BBS direct.0,rel"},
+    {0x04, "OR A,direct"},
+    {0x05, "OR A,abs"},
+    {0x06, "OR A,(X)"},
+    {0x07, "OR A,(direct+X)"},
+    {0x08, "OR A,#imm"},
+    {0x09, "OR direct,imm"},
+    {0x0A, "OR1 C,membit"},
+    {0x0B, "ASL direct"},
+    {0x0C, "ASL abs"},
+    {0x0D, "PUSH PSW"},
+    {0x0E, "TSET1 abs"},
+    {0x0F, "BRK"},
+    {0x10, "BPL rel"},
+    {0x11, "TCALL1"},
+    {0x12, "CLR1 direct.0"},
+    {0x13, "BBC direct.0,rel"},
+    {0x14, "OR A,direct+X"},
+    {0x15, "OR A,abs+X"},
+    {0x16, "OR A,abs+Y"},
+    {0x17, "OR A,(direct)+Y"},
+    {0x18, "OR direct,direct"},
+    {0x19, "OR (X),(Y)"},
+    {0x1A, "DECW direct"},
+    {0x1B, "ASL direct+X"},
+    {0x1C, "ASL A"},
+    {0x1D, "DEC X"},
+    {0x1E, "CMP X,abs"},
+    {0x1F, "JMP (abs+X)"},
+    {0x20, "CLRP"},
+    {0x21, "TCALL2"},
+    {0x22, "SET1 direct.1"},
+    {0x23, "BBS direct.1,rel"},
+    {0x24, "AND A,direct"},
+    {0x25, "AND A,abs"},
+    {0x26, "AND A,(X)"},
+    {0x27, "AND A,(direct+X)"},
+    {0x28, "AND A,#imm"},
+    {0x29, "AND direct,imm"},
+    {0x2A, "OR1 C,/membit"},
+    {0x2B, "ROL direct"},
+    {0x2C, "ROL abs"},
+    {0x2D, "PUSH A"},
+    {0x2E, "CBNE direct,rel"},
+    {0x2F, "BRA rel"},
+    {0x30, "BMI rel"},
+    {0x31, "TCALL3"},
+    {0x32, "CLR1 direct.1"},
+    {0x33, "BBC direct.1,rel"},
+    {0x34, "AND A,direct+X"},
+    {0x35, "AND A,abs+X"},
+    {0x36, "AND A,abs+Y"},
+    {0x37, "AND A,(direct)+Y"},
+    {0x38, "AND direct,direct"},
+    {0x39, "AND (X),(Y)"},
+    {0x3A, "INCW direct"},
+    {0x3B, "ROL direct+X"},
+    {0x3C, "ROL A"},
+    {0x3D, "INC X"},
+    {0x3E, "CMP X,direct"},
+    {0x3F, "CALL abs"},
+    {0x40, "SETP"},
+    {0x41, "TCALL4"},
+    {0x42, "SET1 direct.2"},
+    {0x43, "BBS direct.2,rel"},
+    {0x44, "EOR A,direct"},
+    {0x45, "EOR A,abs"},
+    {0x46, "EOR A,(X)"},
+    {0x47, "EOR A,(direct+X)"},
+    {0x48, "EOR A,#imm"},
+    {0x49, "EOR direct,imm"},
+    {0x4A, "AND1 C,membit"},
+    {0x4B, "LSR direct"},
+    {0x4C, "LSR abs"},
+    {0x4D, "PUSH X"},
+    {0x4E, "TCLR1 abs"},
+    {0x4F, "PCALL addr"},
+    {0x50, "BVC rel"},
+    {0x51, "TCALL5"},
+    {0x52, "CLR1 direct.2"},
+    {0x53, "BBC direct.2,rel"},
+    {0x54, "EOR A,direct+X"},
+    {0x55, "EOR A,abs+X"},
+    {0x56, "EOR A,abs+Y"},
+    {0x57, "EOR A,(direct)+Y"},
+    {0x58, "EOR direct,direct"},
+    {0x59, "EOR (X),(Y)"},
+    {0x5A, "CMPW YA,direct"},
+    {0x5B, "LSR direct+X"},
+    {0x5C, "LSR A"},
+    {0x5D, "MOV X,A"},
+    {0x5E, "CMP Y,abs"},
+    {0x5F, "JMP abs"},
+    {0x60, "CLRC"},
+    {0x61, "TCALL6"},
+    {0x62, "SET1 direct.3"},
+    {0x63, "BBS direct.3,rel"},
+    {0x64, "CMP A,direct"},
+    {0x65, "CMP A,abs"},
+    {0x66, "CMP A,(X)"},
+    {0x67, "CMP A,(direct+X)"},
+    {0x68, "CMP A,#imm"},
+    {0x69, "CMP direct,imm"},
+    {0x6A, "AND1 C,/membit"},
+    {0x6B, "ROR direct"},
+    {0x6C, "ROR abs"},
+    {0x6D, "PUSH Y"},
+    {0x6E, "DBNZ direct,rel"},
+    {0x6F, "RET"},
+    {0x70, "BVS rel"},
+    {0x71, "TCALL7"},
+    {0x72, "CLR1 direct.3"},
+    {0x73, "BBC direct.3,rel"},
+    {0x74, "CMP A,direct+X"},
+    {0x75, "CMP A,abs+X"},
+    {0x76, "CMP A,abs+Y"},
+    {0x77, "CMP A,(direct)+Y"},
+    {0x78, "CMP direct,direct"},
+    {0x79, "CMP (X),(Y)"},
+    {0x7A, "ADDW YA,direct"},
+    {0x7B, "ROR direct+X"},
+    {0x7C, "ROR A"},
+    {0x7D, "MOV A,X"},
+    {0x7E, "CMP Y,direct"},
+    {0x7F, "RETI"},
+    {0x80, "SETC"},
+    {0x81, "TCALL8"},
+    {0x82, "SET1 direct.4"},
+    {0x83, "BBS direct.4,rel"},
+    {0x84, "ADC A,direct"},
+    {0x85, "ADC A,abs"},
+    {0x86, "ADC A,(X)"},
+    {0x87, "ADC A,(direct+X)"},
+    {0x88, "ADC A,#imm"},
+    {0x89, "ADC direct,imm"},
+    {0x8A, "EOR1 C,membit"},
+    {0x8B, "DEC direct"},
+    {0x8C, "DEC abs"},
+    {0x8D, "MOV Y,#imm"},
+    {0x8E, "POP PSW"},
+    {0x8F, "MOV direct,#imm"},
+    {0x90, "BCC rel"},
+    {0x91, "TCALL9"},
+    {0x92, "CLR1 direct.4"},
+    {0x93, "BBC direct.4,rel"},
+    {0x94, "ADC A,direct+X"},
+    {0x95, "ADC A,abs+X"},
+    {0x96, "ADC A,abs+Y"},
+    {0x97, "ADC A,(direct)+Y"},
+    {0x98, "ADC direct,direct"},
+    {0x99, "ADC (X),(Y)"},
+    {0x9A, "SUBW YA,direct"},
+    {0x9B, "DEC direct+X"},
+    {0x9C, "DEC A"},
+    {0x9D, "MOV X,SP"},
+    {0x9E, "DIV YA,X"},
+    {0x9F, "XCN A"},
+    {0xA0, "EI"},
+    {0xA1, "TCALL10"},
+    {0xA2, "SET1 direct.5"},
+    {0xA3, "BBS direct.5,rel"},
+    {0xA4, "SBC A,direct"},
+    {0xA5, "SBC A,abs"},
+    {0xA6, "SBC A,(X)"},
+    {0xA7, "SBC A,(direct+X)"},
+    {0xA8, "SBC A,#imm"},
+    {0xA9, "SBC direct,imm"},
+    {0xAA, "MOV1 C,membit"},
+    {0xAB, "INC direct"},
+    {0xAC, "INC abs"},
+    {0xAD, "CMP Y,#imm"},
+    {0xAE, "POP A"},
+    {0xAF, "MOV (X)+,A"},
+    {0xB0, "BCS rel"},
+    {0xB1, "TCALL11"},
+    {0xB2, "CLR1 direct.5"},
+    {0xB3, "BBC direct.5,rel"},
+    {0xB4, "SBC A,direct+X"},
+    {0xB5, "SBC A,abs+X"},
+    {0xB6, "SBC A,abs+Y"},
+    {0xB7, "SBC A,(direct)+Y"},
+    {0xB8, "SBC direct,direct"},
+    {0xB9, "SBC (X),(Y)"},
+    {0xBA, "MOVW YA,direct"},
+    {0xBB, "INC direct+X"},
+    {0xBC, "INC A"},
+    {0xBD, "MOV SP,X"},
+    {0xBE, "DAS"},
+    {0xBF, "MOV A,(X)+"},
+    {0xC0, "DI"},
+    {0xC1, "TCALL12"},
+    {0xC2, "SET1 direct.6"},
+    {0xC3, "BBS direct.6,rel"},
+    {0xC4, "MOV direct,A"},
+    {0xC5, "MOV abs,A"},
+    {0xC6, "MOV (X),A"},
+    {0xC7, "MOV (direct+X),A"},
+    {0xC8, "CMP X,#imm"},
+    {0xC9, "MOV abs,X"},
+    {0xCA, "MOV1 membit,C"},
+    {0xCB, "MOV direct,Y"},
+    {0xCC, "MOV abs,Y"},
+    {0xCD, "MOV X,#imm"},
+    {0xCE, "POP X"},
+    {0xCF, "MUL YA"},
+    {0xD0, "BNE rel"},
+    {0xD1, "TCALL13"},
+    {0xD2, "CLR1 direct.6"},
+    {0xD3, "BBC direct.6,rel"},
+    {0xD4, "MOV direct+X,A"},
+    {0xD5, "MOV abs+X,A"},
+    {0xD6, "MOV abs+Y,A"},
+    {0xD7, "MOV (direct)+Y,A"},
+    {0xD8, "MOV direct,X"},
+    {0xD9, "MOV direct+Y,X"},
+    {0xDA, "MOVW direct,YA"},
+    {0xDB, "MOV direct+X,Y"},
+    {0xDC, "DEC Y"},
+    {0xDD, "MOV A,Y"},
+    {0xDE, "CBNE direct+X,rel"},
+    {0xDF, "DAA"},
+    {0xE0, "CLRV"},
+    {0xE1, "TCALL14"},
+    {0xE2, "SET1 direct.7"},
+    {0xE3, "BBS direct.7,rel"},
+    {0xE4, "MOV A,direct"},
+    {0xE5, "MOV A,abs"},
+    {0xE6, "MOV A,(X)"},
+    {0xE7, "MOV A,(direct+X)"},
+    {0xE8, "MOV A,#imm"},
+    {0xE9, "MOV X,abs"},
+    {0xEA, "NOT1 membit"},
+    {0xEB, "MOV Y,direct"},
+    {0xEC, "MOV Y,abs"},
+    {0xED, "NOTC"},
+    {0xEE, "POP Y"},
+    {0xEF, "SLEEP"},
+    {0xF0, "BEQ rel"},
+    {0xF1, "TCALL15"},
+    {0xF2, "CLR1 direct.7"},
+    {0xF3, "BBC direct.7,rel"},
+    {0xF4, "MOV A,direct+X"},
+    {0xF5, "MOV A,abs+X"},
+    {0xF6, "MOV A,abs+Y"},
+    {0xF7, "MOV A,(direct)+Y"},
+    {0xF8, "MOV X,direct"},
+    {0xF9, "MOV X,direct+Y"},
+    {0xFA, "MOV direct,S"},
+    {0xFB, "MOV Y,direct+X"},
+    {0xFC, "INC Y"},
+    {0xFD, "MOV Y,A"},
+    {0xFE, "DBNZ Y,rel"},
+    {0xFF, "STOP"}};