Infrastructure Overview

For developers to reference.

The goal of yaze is to build a cross platform editor for the Legend of Zelda: A Link to the Past. The project is built using C++20, SDL2, and ImGui. The project is built using CMake and is designed to be modular and extensible. The project is designed to be built on Windows, macOS, iOS, and Linux.

Targets

yaze: Desktop application for Windows/macOS/Linux
z3ed: Command Line Interface
yaze_c: C Library
yaze_py: Python Module
yaze_test: Unit test executable
yaze_ios: iOS application

Directory Structure

assets: Hosts assets like fonts, icons, assembly source, etc.
cmake: Contains CMake configurations.
docs: Contains documentation for users and developers.
src: Contains source files.
- app: Contains the GUI editor yaze
- app/emu: Contains a standalone Snes emulator application yaze_emu
- cli: Contains the command line interface z3ed
- incl: Contains the data headers for yaze_c
- ios: Contains the iOS application yaze_ios
- lib: Contains the dependencies as git submodules
- py: Contains the Python module yaze_py
- test: Contains testing interface yaze_test
- win32: Contains Windows resource file and icon

Dependencies

See build-instructions.md for more information.

SDL2: Graphics library
ImGui: GUI library
Abseil: C++ library
libpng: Image library
Boost: Python library

Flow of Control

app/yaze.cc
- Initializes absl::FailureSignalHandler for stack tracing.
- Runs the core::Controller loop.
app/core/controller.cc
- Initializes SDLRenderer and SDLWindow
- Initializes ImGui, fonts, themes, and clipboard.
- Handles user input from keyboard and mouse.
- Renders the output to the screen.
- Handles the teardown of SDL and ImGui resources.
app/editor/editor_manager.cc
- Handles the main menu bar
- Handles absl::Status errors as popups delivered to the user.
- Dispatches messages to the various editors.
- Update all the editors in a tab view.
  - app/editor/code/assembly_editor.cc
  - app/editor/dungeon/dungeon_editor.cc
  - app/editor/graphics/graphics_editor.cc
  - app/editor/graphics/gfx_group_editor.cc
  - app/editor/graphics/palette_editor.cc
  - app/editor/graphics/tile16_editor.cc
  - app/editor/message/message_editor.cc
  - app/editor/music/music_editor.cc
  - app/editor/overworld/overworld_editor.cc
  - app/editor/graphics/screen_editor.cc
  - app/editor/sprite/sprite_editor.cc
  - app/editor/system/settings_editor.cc

Rom

app/rom.cc
app/rom.h

The Rom class provides methods to manipulate and access data from a ROM.

Currently implemented as a singleton with SharedRom which is not great but has helped with development velocity. Potential room for improvement is to refactor the editors to take the ROM as a parameter.

Bitmap

app/gfx/bitmap.cc
app/gfx/bitmap.h

This class is responsible for creating, managing, and manipulating bitmap data, which can be displayed on the screen using SDL2 Textures and the ImGui draw list. It also provides functions for exporting these bitmaps to the clipboard in PNG format using libpng.

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