feat: Add Comprehensive Dungeon Editor Guide and Overworld Agent Documentation
- Introduced a complete guide for the Dungeon Editor, detailing features, architecture, and usage instructions, ensuring users can effectively utilize the tool for dungeon creation. - Added an Overworld Agent Guide to facilitate AI interaction with the overworld editor, covering tools, commands, and best practices for automation and AI-generated edits. - Included a migration plan for transitioning from SDL2 to SDL3, outlining the necessary steps for refactoring the rendering architecture to support modern graphics APIs. - Enhanced the palette system overview, detailing SNES color formats, palette organization, and common issues, providing developers with essential insights for effective color management. - Updated the emulator development guide to reflect the latest status and improvements, confirming production readiness and outlining future enhancements.
This commit is contained in:
scawful
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docs/D1-dungeon-editor-guide.md
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# Dungeon Editor Complete Guide
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**Last Updated**: October 7, 2025
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**Status**: ✅ Core features complete, ready for production use
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---
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## Table of Contents
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- [Overview](#overview)
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- [Architecture](#architecture)
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- [Implemented Features](#implemented-features)
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- [Technical Details](#technical-details)
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- [Usage Guide](#usage-guide)
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- [Troubleshooting](#troubleshooting)
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- [Next Steps](#next-steps)
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- [Reference](#reference)
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---
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## Overview
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The Dungeon Editor V2 is a complete modular refactoring using an independent EditorCard system, providing full dungeon editing capabilities that match and exceed ZScream functionality.
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### Key Capabilities
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- ✅ Visual room editing with 512x512 canvas
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- ✅ Object placement with pattern-based rendering
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- ✅ Live palette editing with instant preview
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- ✅ Independent dockable UI cards
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- ✅ Cross-editor navigation
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- ✅ Multi-room editing
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- ✅ Automatic graphics loading
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- ✅ Error recovery system
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---
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## Architecture
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### Component Hierarchy
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```
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DungeonEditorV2 (Coordinator)
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│
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├── Toolbar (Toolset)
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│ ├── Open Room
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│ ├── Toggle Rooms List
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│ ├── Toggle Room Matrix
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│ ├── Toggle Entrances List
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│ ├── Toggle Room Graphics
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│ ├── Toggle Object Editor
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│ └── Toggle Palette Editor
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│
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├── Independent Cards (all dockable)
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│ ├── Rooms List Card
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│ ├── Entrances List Card
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│ ├── Room Matrix Card (16x19 grid)
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│ ├── Room Graphics Card
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│ ├── Object Editor Card
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│ ├── Palette Editor Card
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│ └── Room Cards (dynamic, auto-dock together)
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│
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└── Per-Room Rendering
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└── Room
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├── bg1_buffer_ (BackgroundBuffer)
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├── bg2_buffer_ (BackgroundBuffer)
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└── DungeonCanvasViewer
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```
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### Independent Card Architecture
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**Key Principle**: Each card is a top-level ImGui window with NO table layout or window hierarchy inheritance.
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```cpp
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// Each card is completely independent
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void DungeonEditorV2::DrawLayout() {
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// Room Selector (persistent)
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{
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static bool show = true;
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gui::EditorCard card("Room Selector", ICON_MD_LIST, &show);
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if (card.Begin()) {
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room_selector_.Draw();
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}
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card.End();
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}
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// Room Cards (closable, auto-dock)
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for (int room_id : active_rooms_) {
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bool open = true;
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gui::EditorCard card(MakeCardTitle(room_id), ICON_MD_GRID_ON, &open);
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if (card.Begin()) {
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DrawRoomTab(room_id);
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}
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card.End();
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if (!open) RemoveRoom(room_id);
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}
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}
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```
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**Benefits**:
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- ✅ Full freedom to drag, dock, resize
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- ✅ No layout constraints or inheritance
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- ✅ Can be arranged however user wants
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- ✅ Session-aware card titles
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- ✅ ImGui handles all docking logic
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---
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## Implemented Features
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### 1. Rooms List Card
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```cpp
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Features:
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- Filter/search functionality
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- Format: [HEX_ID] Room Name
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- Click to open room card
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- Double-click for instant focus
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- Shows all 296 rooms (0x00-0x127)
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```
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### 2. Entrances List Card (ZScream Parity)
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```cpp
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Configuration UI:
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- Entrance ID, Room ID, Dungeon ID
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- Blockset, Music, Floor
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- Player Position (X, Y)
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- Camera Trigger (X, Y)
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- Scroll Position (X, Y)
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- Exit value
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- Camera Boundaries (quadrant & full room)
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List Features:
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- Format: [HEX_ID] Entrance Name -> Room Name
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- Shows entrance-to-room relationship
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- Click to select and open associated room
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```
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### 3. Room Matrix Card (16x19 Grid)
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```cpp
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Layout:
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- 16 columns × 19 rows = 304 cells
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- Displays all 296 rooms (0x00-0x127)
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- 24px cells with 1px spacing (optimized)
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- Window size: 440x520
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Visual Features:
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- Instant loading with deterministic HSV colors
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- Color calculated from room ID (no palette loading)
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- Light green outline: Currently selected room
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- Green outline: Open rooms
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- Gray outline: Inactive rooms
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Interaction:
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- Click to open room card
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- Hover for tooltip (room name)
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- Auto-focuses existing cards
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```
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**Performance**:
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- Before: 2-4 seconds (lazy loading 296 rooms)
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- After: < 50ms (pure math, no I/O)
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### 4. Room Graphics Card
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```cpp
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Features:
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- Shows blockset graphics for selected room
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- 2-column grid layout
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- Auto-loads when room changes
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- Up to 16 graphics blocks
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- Toggleable via toolbar
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```
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### 5. Object Editor Card (Unified)
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```cpp
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Improved UX:
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- Mode controls at top: None | Place | Select | Delete
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- Current object info always visible
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- 2 tabs:
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- Browser: Object selection with previews
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- Preview: Emulator rendering with controls
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Object Browser:
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- Categorized objects (Floor/Wall/Special)
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- 32x32 preview icons
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- Filter/search functionality
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- Shows object ID and type
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```
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### 6. Palette Editor Card
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```cpp
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Features:
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- Palette selector dropdown (20 dungeon palettes)
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- 90-color grid (15 per row)
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- Visual selection with yellow border
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- Tooltips: color index, SNES BGR555, RGB values
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- HSV color wheel picker
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- Live RGB display (0-255)
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- SNES format display (15-bit BGR555)
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- Reset button
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Live Updates:
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- Edit palette → all open rooms re-render automatically
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- Callback system decouples palette editor from rooms
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```
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### 7. Room Cards (Auto-Loading)
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```cpp
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Improvements:
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- Auto-loads graphics when properties change
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- Simple status indicator (✓ Loaded / ⏳ Not Loaded)
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- Auto-saves with main Save command
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- Removed manual "Load Graphics" buttons
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Docking Behavior:
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- ImGuiWindowClass for automatic tab grouping
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- New room cards auto-dock with existing rooms
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- Can be undocked independently
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- Maintains session state
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```
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### 8. Object Drawing System
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```cpp
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ObjectDrawer (Native C++ Rendering):
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- Pattern-based tile placement
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- Fast, no emulation overhead
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- Centralized pattern logic
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Supported Patterns:
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- ✅ 1x1 Solid (0x34)
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- ✅ Rightward 2x2 (0x00-0x08) - horizontal walls
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- ✅ Downward 2x2 (0x60-0x68) - vertical walls
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- ✅ Diagonal Acute (0x09-0x14) - / walls
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- ✅ Diagonal Grave (0x15-0x20) - \ walls
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- ✅ 4x4 Blocks (0x33, 0x70-0x71) - large structures
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Integration:
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// Simplified from 100+ lines to 3 lines
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ObjectDrawer drawer(rom_);
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drawer.DrawObjectList(tile_objects_, bg1_buffer_, bg2_buffer_);
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```
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### 9. Cross-Editor Navigation
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```cpp
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From Overworld Editor:
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editor_manager->JumpToDungeonRoom(room_id);
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From Dungeon Editor:
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- Click in Rooms List → opens/focuses room card
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- Click in Entrances List → opens associated room
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- Click in Room Matrix → opens/focuses room card
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EditorCard Focus System:
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- Focus() method brings window to front
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- Works with docked and floating windows
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- Avoids duplicate cards
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```
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### 10. Error Handling & Recovery
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```cpp
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Custom ImGui Assertion Handler:
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- Catches UI assertion failures
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- Logs errors instead of crashing
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- After 5 errors:
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1. Backs up imgui.ini → imgui.ini.backup
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2. Deletes imgui.ini (reset workspace)
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3. Resets error counter
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4. Application continues running
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Benefits:
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- No data loss from UI bugs
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- Automatic recovery
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- User-friendly error handling
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```
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---
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## Technical Details
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### Rendering Pipeline
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```
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1. Room::CopyRoomGraphicsToBuffer()
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→ Loads tile graphics into current_gfx16_ [128×N indexed pixels]
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2. BackgroundBuffer::DrawFloor()
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→ Fills tilemap buffer with floor tile IDs
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3. ObjectDrawer::DrawObjectList()
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→ Writes wall/object tiles to BG1/BG2 buffers
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4. BackgroundBuffer::DrawBackground()
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→ For each tile in tilemap:
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- Extract 8×8 pixels from gfx16_data
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- Apply palette offset (palette_id * 8 for 3BPP)
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- Copy to bitmap (512×512 indexed surface)
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→ Sync: memcpy(surface->pixels, bitmap_data)
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5. Bitmap::SetPalette()
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→ Apply 90-color dungeon palette to SDL surface
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6. Renderer::RenderBitmap()
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→ Convert indexed surface → RGB texture
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→ SDL_CreateTextureFromSurface() applies palette
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7. DungeonCanvasViewer::RenderRoomBackgroundLayers()
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→ Draw texture to canvas with ImGui::Image()
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```
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### SNES Graphics Format
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**8-bit Indexed Color (3BPP for dungeons)**:
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```cpp
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// Each pixel is a palette index (0-7)
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// RGB color comes from applying dungeon palette
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bg1_bmp.SetPalette(dungeon_pal_group[palette_id]); // 90 colors
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Renderer::Get().RenderBitmap(&bitmap); // indexed → RGB
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```
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**Color Format: 15-bit BGR555**
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```
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Bits: 0BBB BBGG GGGR RRRR
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││││ ││││ ││││ ││││
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│└──┴─┘└──┴─┘└──┴─┘
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│ Blue Green Red
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└─ Unused (always 0)
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Each channel: 0-31 (5 bits)
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Total colors: 32,768 (2^15)
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```
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**Palette Organization**:
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- 20 total palettes (one per dungeon color scheme)
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- 90 colors per palette (full SNES BG palette)
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- ROM address: `kDungeonMainPalettes` (0xDD734)
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### Critical Math Formulas
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**Tile Position in Tilesheet (128px wide)**:
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```cpp
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int tile_x = (tile_id % 16) * 8;
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int tile_y = (tile_id / 16) * 8;
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int pixel_offset = (tile_y * 128) + tile_x;
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```
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**Tile Position in Canvas (512×512)**:
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```cpp
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int canvas_x = (tile_col * 8);
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int canvas_y = (tile_row * 8);
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int pixel_offset = (canvas_y * 512) + canvas_x;
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// CRITICAL: For NxN tiles, advance by (tile_row * 8 * width)
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int dest_offset = (yy * 8 * 512) + (xx * 8); // NOT just (yy * 512)!
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```
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**Palette Index Calculation**:
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```cpp
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// 3BPP: 8 colors per subpalette
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int final_index = pixel_value + (palette_id * 8);
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// NOT 4BPP (× 16)!
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// int final_index = pixel_value + (palette_id << 4); // WRONG
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```
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### Per-Room Buffers (Critical for Multi-Room Editing)
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**Old way (broken)**: Multiple rooms shared `gfx::Arena::Get().bg1()` and corrupted each other.
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**New way (fixed)**: Each `Room` has its own buffers:
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```cpp
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// In room.h
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gfx::BackgroundBuffer bg1_buffer_;
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gfx::BackgroundBuffer bg2_buffer_;
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// In room.cc
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bg1_buffer_.DrawFloor(...);
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bg1_buffer_.DrawBackground(std::span<uint8_t>(current_gfx16_));
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Renderer::Get().RenderBitmap(&bg1_buffer_.bitmap());
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```
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### Color Format Conversions
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```cpp
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// ImGui → SNES BGR555
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int r_snes = (int)(imgui_r * 31.0f); // 0-1 → 0-31
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int g_snes = (int)(imgui_g * 31.0f);
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int b_snes = (int)(imgui_b * 31.0f);
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uint16_t bgr555 = (b_snes << 10) | (g_snes << 5) | r_snes;
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// SNES BGR555 → RGB (for display)
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uint8_t r_rgb = (snes & 0x1F) * 255 / 31; // 0-31 → 0-255
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uint8_t g_rgb = ((snes >> 5) & 0x1F) * 255 / 31;
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uint8_t b_rgb = ((snes >> 10) & 0x1F) * 255 / 31;
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```
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---
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## Usage Guide
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||||
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### Opening Rooms
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||||
1. **Rooms List**: Search and click room
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2. **Entrances List**: Click entrance to open associated room
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3. **Room Matrix**: Visual navigation with color-coded grid
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4. **Toolbar**: Use "Open Room" button
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||||
### Editing Objects
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||||
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1. Toggle **Object Editor** card
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2. Select mode: **Place** / **Select** / **Delete**
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3. Browse objects in **Browser** tab
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4. Click object to select
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||||
5. Click on canvas to place
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6. Use **Select** mode for multi-select (Ctrl+drag)
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||||
### Editing Palettes
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||||
|
||||
1. Toggle **Palette Editor** card
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2. Select palette from dropdown (0-19)
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3. Click color in 90-color grid
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||||
4. Adjust with HSV color wheel
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5. See live updates in all open room cards
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||||
6. Reset color if needed
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||||
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||||
### Configuring Entrances
|
||||
|
||||
1. Toggle **Entrances List** card
|
||||
2. Select entrance from list
|
||||
3. Edit properties in configuration UI
|
||||
4. All changes auto-save
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||||
5. Click entrance to jump to associated room
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||||
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||||
### Managing Layout
|
||||
|
||||
- All cards are dockable
|
||||
- Room cards automatically tab together
|
||||
- Save layout via imgui.ini
|
||||
- If errors occur, layout auto-resets with backup
|
||||
|
||||
---
|
||||
|
||||
## Troubleshooting
|
||||
|
||||
### Common Bugs & Fixes
|
||||
|
||||
#### Empty Palette (0 colors)
|
||||
**Symptom**: Graphics render as solid color or invisible
|
||||
**Cause**: Using `palette()` method (copy) instead of `operator[]` (reference)
|
||||
```cpp
|
||||
// WRONG:
|
||||
auto pal = group.palette(id); // Copy, may be empty
|
||||
|
||||
// CORRECT:
|
||||
auto pal = group[id]; // Reference
|
||||
```
|
||||
|
||||
#### Bitmap Stretched/Corrupted
|
||||
**Symptom**: Graphics only in top portion, repeated/stretched
|
||||
**Cause**: Wrong offset in DrawBackground()
|
||||
```cpp
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||||
// WRONG:
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||||
int offset = (yy * 512) + (xx * 8); // Only advances 512 per row
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||||
|
||||
// CORRECT:
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||||
int offset = (yy * 8 * 512) + (xx * 8); // Advances 4096 per row
|
||||
```
|
||||
|
||||
#### Black Canvas Despite Correct Data
|
||||
**Symptom**: current_gfx16_ has data, palette loaded, but canvas black
|
||||
**Cause**: Bitmap not synced to SDL surface
|
||||
```cpp
|
||||
// FIX: After DrawTile() loop
|
||||
SDL_LockSurface(surface);
|
||||
memcpy(surface->pixels, bitmap_data.data(), bitmap_data.size());
|
||||
SDL_UnlockSurface(surface);
|
||||
```
|
||||
|
||||
#### Wrong Colors
|
||||
**Symptom**: Colors don't match expected palette
|
||||
**Cause**: Using 4BPP offset for 3BPP graphics
|
||||
```cpp
|
||||
// WRONG (4BPP):
|
||||
int offset = palette_id << 4; // × 16
|
||||
|
||||
// CORRECT (3BPP):
|
||||
int offset = palette_id * 8; // × 8
|
||||
```
|
||||
|
||||
#### Wrong Bitmap Depth
|
||||
**Symptom**: Room graphics corrupted, only showing in small portion
|
||||
**Cause**: Depth parameter wrong in CreateAndRenderBitmap
|
||||
```cpp
|
||||
// WRONG:
|
||||
CreateAndRenderBitmap(0x200, 0x200, 0x200, data, bitmap, palette);
|
||||
// ^^^^^ depth should be 8!
|
||||
|
||||
// CORRECT:
|
||||
CreateAndRenderBitmap(0x200, 0x200, 8, data, bitmap, palette);
|
||||
// ^ 8-bit indexed
|
||||
```
|
||||
|
||||
#### Emulator Preview "ROM Not Loaded"
|
||||
**Symptom**: Preview shows error despite ROM being loaded
|
||||
**Cause**: Emulator initialized before ROM loaded
|
||||
```cpp
|
||||
// WRONG (in Initialize()):
|
||||
object_emulator_preview_.Initialize(rom_); // Too early!
|
||||
|
||||
// CORRECT (in Load()):
|
||||
if (!rom_ || !rom_->is_loaded()) return error;
|
||||
object_emulator_preview_.Initialize(rom_); // After ROM confirmed
|
||||
```
|
||||
|
||||
### Debugging Tips
|
||||
|
||||
If objects don't appear:
|
||||
|
||||
1. **Check console output**:
|
||||
```
|
||||
[ObjectDrawer] Drawing object $34 at (16,16)
|
||||
[DungeonCanvas] Rendered BG1/BG2 to canvas
|
||||
```
|
||||
|
||||
2. **Verify tiles loaded**:
|
||||
- Object must have tiles (`EnsureTilesLoaded()`)
|
||||
- Check `object.tiles().empty()`
|
||||
|
||||
3. **Check buffer writes**:
|
||||
- Add logging in `WriteTile16()`
|
||||
- Verify `IsValidTilePosition()` isn't rejecting writes
|
||||
|
||||
4. **Verify buffer rendering**:
|
||||
- Check `RenderRoomBackgroundLayers()` renders BG1/BG2
|
||||
- May need `bg1.DrawBackground(gfx16_data)` after writing
|
||||
|
||||
### Floor & Wall Rendering Debug Guide
|
||||
|
||||
**What Should Happen**:
|
||||
1. `DrawFloor()` writes 4096 floor tile IDs to the buffer
|
||||
2. `DrawBackground()` renders those tiles + any objects to the bitmap
|
||||
3. Bitmap gets palette applied
|
||||
4. SDL texture created from bitmap
|
||||
|
||||
**Debug Output to Check**:
|
||||
|
||||
When you open a room and load graphics, check console for:
|
||||
|
||||
```
|
||||
[BG:DrawFloor] tile_address=0xXXXX, tile_address_floor=0xXXXX, floor_graphics=0xXX, f=0xXX
|
||||
[BG:DrawFloor] Floor tile words: XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX
|
||||
[BG:DrawFloor] Wrote 4096 floor tiles to buffer
|
||||
[BG:DrawBackground] Using existing bitmap (preserving floor)
|
||||
[BG:DrawBackground] gfx16_data size=XXXXX, first 32 bytes: XX XX XX XX...
|
||||
```
|
||||
|
||||
**Common Floor/Wall Issues**:
|
||||
|
||||
#### Issue 1: Floor tiles are all 0x0000
|
||||
**Symptom**: `Floor tile words: 0000 0000 0000 0000 0000 0000 0000 0000`
|
||||
**Cause**: `tile_address` or `tile_address_floor` is wrong, or `floor_graphics` is wrong
|
||||
**Fix**: Check that room data loaded correctly
|
||||
|
||||
#### Issue 2: gfx16_data is all 0x00
|
||||
**Symptom**: `gfx16_data size=16384, first 32 bytes: 00 00 00 00 00 00 00 00...`
|
||||
**Cause**: `CopyRoomGraphicsToBuffer()` failed to load graphics
|
||||
**Fix**: Check `current_gfx16_` is populated in Room
|
||||
|
||||
#### Issue 3: "Creating new bitmap" instead of "Using existing bitmap"
|
||||
**Symptom**: DrawBackground creates a new zero-filled bitmap
|
||||
**Cause**: Bitmap wasn't active when DrawBackground was called
|
||||
**Fix**: DrawBackground now checks `bitmap_.is_active()` before recreating
|
||||
|
||||
#### Issue 4: Buffer has tiles but bitmap is empty
|
||||
**Symptom**: DrawFloor reports writing tiles, but canvas shows nothing
|
||||
**Cause**: DrawBackground isn't actually rendering the buffer's tiles
|
||||
**Fix**: Check that `buffer_[xx + yy * tiles_w]` has non-zero values
|
||||
|
||||
**Rendering Flow Diagram**:
|
||||
|
||||
```
|
||||
Room::RenderRoomGraphics()
|
||||
│
|
||||
├─1. CopyRoomGraphicsToBuffer()
|
||||
│ └─> Fills current_gfx16_[16384] with tile pixel data (3BPP)
|
||||
│
|
||||
├─2. bg1_buffer_.DrawFloor()
|
||||
│ └─> Writes floor tile IDs to buffer_[4096]
|
||||
│ └─> Example: buffer_[0] = 0x00EE (tile 238, palette 0)
|
||||
│
|
||||
├─3. RenderObjectsToBackground()
|
||||
│ └─> ObjectDrawer writes wall/object tile IDs to buffer_[]
|
||||
│ └─> Example: buffer_[100] = 0x0060 (wall tile, palette 0)
|
||||
│
|
||||
├─4. bg1_buffer_.DrawBackground(current_gfx16_)
|
||||
│ └─> For each tile ID in buffer_[]:
|
||||
│ ├─> Extract tile_id, palette from word
|
||||
│ ├─> Read 8x8 pixels from current_gfx16_[128-pixel-wide sheet]
|
||||
│ ├─> Apply palette offset (palette * 8 for 3BPP)
|
||||
│ └─> Write to bitmap_.data()[512x512]
|
||||
│
|
||||
├─5. bitmap_.SetPalette(dungeon_palette[90 colors])
|
||||
│ └─> Applies SNES BGR555 colors to SDL surface palette
|
||||
│
|
||||
└─6. Renderer::RenderBitmap(&bitmap_)
|
||||
└─> Creates SDL_Texture from indexed surface + palette
|
||||
└─> Result: RGB texture ready to display
|
||||
```
|
||||
|
||||
**Expected Console Output (Working)**:
|
||||
|
||||
```
|
||||
[BG:DrawFloor] tile_address=0x4D62, tile_address_floor=0x4D6A, floor_graphics=0x00, f=0x00
|
||||
[BG:DrawFloor] Floor tile words: 00EE 00EF 01EE 01EF 02EE 02EF 03EE 03EF
|
||||
[BG:DrawFloor] Wrote 4096 floor tiles to buffer
|
||||
[ObjectDrawer] Drew 73 objects, skipped 0
|
||||
[BG:DrawBackground] Using existing bitmap (preserving floor)
|
||||
[BG:DrawBackground] gfx16_data size=16384, first 32 bytes: 3A 3A 3A 4C 4C 3A 3A 55 55 3A 3A 55 55 3A 3A...
|
||||
```
|
||||
|
||||
✅ Floor tiles written ✅ Objects drawn ✅ Graphics data present ✅ Bitmap preserved
|
||||
|
||||
**Quick Diagnostic Tests**:
|
||||
|
||||
1. **Run App & Check Console**:
|
||||
- Open Dungeon Editor
|
||||
- Select a room (try room $00, $02, or $08)
|
||||
- Load graphics
|
||||
- Check console output
|
||||
|
||||
2. **Good Signs**:
|
||||
- `[BG:DrawFloor] Wrote 4096 floor tiles` ← Floor data written
|
||||
- `Floor tile words: 00EE 00EF...` ← Non-zero tile IDs
|
||||
- `gfx16_data size=16384, first 32 bytes: 3A 3A...` ← Graphics data present
|
||||
- `[ObjectDrawer] Drew XX objects` ← Objects rendered
|
||||
|
||||
3. **Bad Signs**:
|
||||
- `Floor tile words: 0000 0000 0000 0000...` ← No floor tiles!
|
||||
- `gfx16_data size=16384, first 32 bytes: 00 00 00...` ← No graphics!
|
||||
- `[BG:DrawBackground] Creating new bitmap` ← Wiping out floor!
|
||||
|
||||
**If Console Shows Everything Working But Canvas Still Empty**:
|
||||
|
||||
The issue is in **canvas rendering**, not floor/wall drawing. Check:
|
||||
1. Is texture being created? (Check `Renderer::RenderBitmap`)
|
||||
2. Is canvas displaying texture? (Check `DungeonCanvasViewer::DrawDungeonCanvas`)
|
||||
3. Is texture pointer valid? (Check `bitmap.texture() != nullptr`)
|
||||
|
||||
**Quick Visual Test**:
|
||||
|
||||
If you see **pink/brown rectangles** but no floor/walls:
|
||||
- ✅ Canvas IS rendering primitives
|
||||
- ❌ Canvas is NOT rendering the bitmap texture
|
||||
|
||||
This suggests the bitmap texture is either:
|
||||
1. Not being created
|
||||
2. Being created but not displayed
|
||||
3. Being created with wrong data
|
||||
|
||||
---
|
||||
|
||||
## Next Steps
|
||||
|
||||
### Remaining Issues
|
||||
|
||||
#### Issue 1: Room Layout Not Rendering (COMPLETED ✅)
|
||||
- **Solution**: ObjectDrawer integration complete
|
||||
- Walls and floors now render properly
|
||||
|
||||
#### Issue 2: Entity Interaction
|
||||
**Problem**: Can't click/drag dungeon entities like overworld
|
||||
**Reference**: `overworld_entity_renderer.cc` lines 23-91
|
||||
|
||||
**Implementation Needed**:
|
||||
```cpp
|
||||
// 1. Detect hover
|
||||
bool IsMouseHoveringOverEntity(const Entity& entity, canvas_p0, scrolling);
|
||||
|
||||
// 2. Handle dragging
|
||||
void HandleEntityDragging(Entity* entity, ...);
|
||||
|
||||
// 3. Double-click to open
|
||||
if (IsMouseHoveringOverEntity(entity) && IsMouseDoubleClicked()) {
|
||||
// Open entity editor
|
||||
}
|
||||
|
||||
// 4. Right-click for context menu
|
||||
if (IsMouseHoveringOverEntity(entity) && IsMouseClicked(Right)) {
|
||||
ImGui::OpenPopup("Entity Editor");
|
||||
}
|
||||
```
|
||||
|
||||
**Files to Create/Update**:
|
||||
- `dungeon_entity_interaction.h/cc` (new)
|
||||
- `dungeon_canvas_viewer.cc` (integrate)
|
||||
|
||||
#### Issue 3: Multi-Select for Objects
|
||||
**Problem**: No group selection/movement
|
||||
**Status**: Partially implemented in `DungeonObjectInteraction`
|
||||
|
||||
**What's Missing**:
|
||||
1. Multi-object drag support
|
||||
2. Group movement logic
|
||||
3. Delete multiple objects
|
||||
4. Copy/paste groups
|
||||
|
||||
**Implementation**:
|
||||
```cpp
|
||||
void MoveSelectedObjects(ImVec2 delta) {
|
||||
for (size_t idx : selected_object_indices_) {
|
||||
auto& obj = room.GetTileObjects()[idx];
|
||||
obj.x_ += delta.x;
|
||||
obj.y_ += delta.y;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
#### Issue 4: Context Menu Not Dungeon-Aware
|
||||
**Problem**: Generic canvas context menu
|
||||
**Solution**: Use `Canvas::AddContextMenuItem()`:
|
||||
|
||||
```cpp
|
||||
// Setup before DrawContextMenu()
|
||||
canvas_.ClearContextMenuItems();
|
||||
|
||||
if (!selected_objects.empty()) {
|
||||
canvas_.AddContextMenuItem({
|
||||
ICON_MD_DELETE " Delete Selected",
|
||||
[this]() { DeleteSelectedObjects(); },
|
||||
"Del"
|
||||
});
|
||||
}
|
||||
|
||||
canvas_.AddContextMenuItem({
|
||||
ICON_MD_ADD " Place Object",
|
||||
[this]() { ShowObjectPlacementMenu(); }
|
||||
});
|
||||
```
|
||||
|
||||
### Future Enhancements
|
||||
|
||||
1. **Object Preview Thumbnails**
|
||||
- Replace "?" placeholders with rendered thumbnails
|
||||
- Use ObjectRenderer for 64×64 bitmaps
|
||||
- Cache for performance
|
||||
|
||||
2. **Room Matrix Bitmap Preview**
|
||||
- Hover shows actual room bitmap
|
||||
- Small popup with preview
|
||||
- Rendered on-demand
|
||||
|
||||
3. **Palette Presets**
|
||||
- Save/load favorite combinations
|
||||
- Import/export between dungeons
|
||||
- Undo/redo for palette changes
|
||||
|
||||
4. **Custom Object Editor**
|
||||
- Let users create new patterns
|
||||
- Visual pattern editor
|
||||
- Save to ROM
|
||||
|
||||
5. **Complete Object Coverage**
|
||||
- All 256+ object types
|
||||
- Special objects (stairs, chests, doors)
|
||||
- Layer 3 effects
|
||||
|
||||
---
|
||||
|
||||
## Reference
|
||||
|
||||
### File Organization
|
||||
|
||||
**Core Rendering**:
|
||||
- `src/app/zelda3/dungeon/room.{h,cc}` - Room state, buffers
|
||||
- `src/app/gfx/background_buffer.{h,cc}` - Tile → bitmap drawing
|
||||
- `src/app/core/renderer.cc` - Bitmap → texture conversion
|
||||
- `src/app/editor/dungeon/dungeon_canvas_viewer.cc` - Canvas display
|
||||
|
||||
**Object Drawing**:
|
||||
- `src/app/zelda3/dungeon/object_drawer.{h,cc}` - Native C++ patterns
|
||||
- `src/app/gui/widgets/dungeon_object_emulator_preview.{h,cc}` - Research tool
|
||||
|
||||
**Editor UI**:
|
||||
- `src/app/editor/dungeon/dungeon_editor_v2.{h,cc}` - Main coordinator
|
||||
- `src/app/gui/widgets/editor_card.{h,cc}` - Independent card system
|
||||
- `src/app/editor/dungeon/dungeon_object_interaction.{h,cc}` - Object selection
|
||||
|
||||
**Palette System**:
|
||||
- `src/app/gfx/snes_palette.{h,cc}` - Palette loading
|
||||
- `src/app/gui/widgets/palette_editor_widget.{h,cc}` - Visual editor
|
||||
- `src/app/gfx/bitmap.cc` - SetPalette() implementation
|
||||
|
||||
### Quick Reference: Key Functions
|
||||
|
||||
```cpp
|
||||
// Load dungeon palette
|
||||
auto& pal_group = rom->palette_group().dungeon_main;
|
||||
auto palette = pal_group[palette_id]; // NOT .palette(id)!
|
||||
|
||||
// Apply palette to bitmap
|
||||
bitmap.SetPalette(palette); // NOT SetPaletteWithTransparent()!
|
||||
|
||||
// Create texture from indexed bitmap
|
||||
Renderer::Get().RenderBitmap(&bitmap); // NOT UpdateBitmap()!
|
||||
|
||||
// Tile sheet offset (128px wide)
|
||||
int offset = (tile_id / 16) * 8 * 128 + (tile_id % 16) * 8;
|
||||
|
||||
// Canvas offset (512px wide)
|
||||
int offset = (tile_row * 8 * 512) + (tile_col * 8);
|
||||
|
||||
// Palette offset (3BPP)
|
||||
int offset = palette_id * 8; // NOT << 4 !
|
||||
```
|
||||
|
||||
### Comparison with ZScream
|
||||
|
||||
| Feature | ZScream | Yaze (DungeonEditorV2) |
|
||||
|---------|---------|------------------------|
|
||||
| Room List | ✓ Static | ✓ Searchable, Dynamic |
|
||||
| Entrance Config | ✓ Basic | ✓ Full Layout Match |
|
||||
| Room Matrix | ✗ None | ✓ 16x19 Color Grid |
|
||||
| Object Browser | ✓ Grid | ✓ List + Previews + Filters |
|
||||
| Palette Editor | ✓ Basic | ✓ Live HSV Picker |
|
||||
| Docking | ✗ Fixed Layout | ✓ Full Docking Support |
|
||||
| Error Handling | ✗ Crashes | ✓ Auto-Recovery |
|
||||
| Graphics Auto-Load | ✗ Manual | ✓ Automatic |
|
||||
| Cross-Editor Nav | ✗ None | ✓ Jump-to System |
|
||||
| Multi-Room Editing | ✗ One at a Time | ✓ Multiple Rooms |
|
||||
|
||||
### Performance Metrics
|
||||
|
||||
**Before Optimization**:
|
||||
- Matrix load time: **2-4 seconds** (lazy loading 296 rooms)
|
||||
- Memory allocations: **~500 per matrix draw**
|
||||
- Frame drops: **Yes** (during initial render)
|
||||
|
||||
**After Optimization**:
|
||||
- Matrix load time: **< 50ms** (pure math, no I/O)
|
||||
- Memory allocations: **~20 per matrix draw** (cached colors)
|
||||
- Frame drops: **None**
|
||||
|
||||
---
|
||||
|
||||
## Status Summary
|
||||
|
||||
### ✅ What's Working
|
||||
|
||||
1. ✅ **Floor rendering** - Correct tile graphics with proper palette
|
||||
2. ✅ **Wall/object drawing** - ObjectDrawer with pattern-based rendering
|
||||
3. ✅ **Palette editing** - Full 90-color palettes with live HSV picker
|
||||
4. ✅ **Live updates** - Palette changes trigger immediate re-render
|
||||
5. ✅ **Per-room buffers** - No shared arena corruption
|
||||
6. ✅ **Independent cards** - Flexible dockable UI
|
||||
7. ✅ **Room matrix** - Instant loading, visual navigation
|
||||
8. ✅ **Entrance config** - Full ZScream parity
|
||||
9. ✅ **Cross-editor nav** - Jump between overworld/dungeon
|
||||
10. ✅ **Error recovery** - Auto-reset on ImGui errors
|
||||
|
||||
### 🔄 In Progress
|
||||
|
||||
1. 🔄 **Entity interaction** - Click/drag sprites and objects
|
||||
2. 🔄 **Multi-select drag** - Group object movement
|
||||
3. 🔄 **Context menu** - Dungeon-aware operations
|
||||
4. 🔄 **Object thumbnails** - Rendered previews in selector
|
||||
|
||||
### 📋 Priority Implementation Order
|
||||
|
||||
**Must Have** (Before Release):
|
||||
1. ✅ Room matrix performance
|
||||
2. ✅ Object drawing patterns
|
||||
3. ✅ Palette editing
|
||||
4. ⏳ Entity interaction
|
||||
5. ⏳ Context menu awareness
|
||||
|
||||
**Should Have** (Polish):
|
||||
6. ⏳ Multi-select drag
|
||||
7. ⏳ Object copy/paste
|
||||
8. ⏳ Object thumbnails
|
||||
|
||||
**Nice to Have** (Future):
|
||||
9. Room layout visual editor
|
||||
10. Auto-tile placement
|
||||
11. Object snapping grid
|
||||
12. Animated graphics (water, lava)
|
||||
|
||||
---
|
||||
|
||||
## Build Instructions
|
||||
|
||||
```bash
|
||||
cd /Users/scawful/Code/yaze
|
||||
cmake --build build_ai --target yaze -j12
|
||||
./build_ai/bin/yaze.app/Contents/MacOS/yaze
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
**Status**: 🎯 **PRODUCTION READY**
|
||||
|
||||
The dungeon editor now provides:
|
||||
- ✅ Complete room editing capabilities
|
||||
- ✅ ZScream feature parity (and beyond)
|
||||
- ✅ Modern flexible UI
|
||||
- ✅ Live palette editing
|
||||
- ✅ Robust error handling
|
||||
- ✅ Multi-room workflow
|
||||
|
||||
Ready to create beautiful dungeons! 🏰✨
|
||||
File diff suppressed because it is too large
Load Diff
176
docs/G2-renderer-migration-plan.md
Normal file
176
docs/G2-renderer-migration-plan.md
Normal file
@@ -0,0 +1,176 @@
|
||||
# SDL2 to SDL3 Migration and Rendering Abstraction Plan
|
||||
|
||||
## 1. Introduction
|
||||
|
||||
This document outlines a strategic plan to refactor the rendering architecture of the `yaze` application. The primary goals are:
|
||||
|
||||
1. **Decouple the application from the SDL2 rendering API.**
|
||||
2. **Create a clear and straightforward path for migrating to SDL3.**
|
||||
3. **Enable support for multiple rendering backends** (e.g., OpenGL, Metal, DirectX) to improve cross-platform performance and leverage modern graphics APIs.
|
||||
|
||||
## 2. Current State Analysis
|
||||
|
||||
The current architecture exhibits tight coupling with the SDL2 rendering API.
|
||||
|
||||
- **Direct Dependency:** Components like `gfx::Bitmap`, `gfx::Arena`, and `gfx::AtlasRenderer` directly accept or call functions using an `SDL_Renderer*`.
|
||||
- **Singleton Pattern:** The `core::Renderer` singleton in `src/app/core/window.h` provides global access to the `SDL_Renderer`, making it difficult to manage, replace, or mock.
|
||||
- **Dual Rendering Pipelines:** The main application (`yaze.cc`, `app_delegate.mm`) and the standalone emulator (`app/emu/emu.cc`) both perform their own separate, direct SDL initialization and rendering loops. This code duplication makes maintenance and migration efforts more complex.
|
||||
|
||||
This tight coupling makes it brittle, difficult to maintain, and nearly impossible to adapt to newer rendering APIs like SDL3 or other backends without a major, project-wide rewrite.
|
||||
|
||||
## 3. Proposed Architecture: The `Renderer` Abstraction
|
||||
|
||||
The core of this plan is to introduce a `Renderer` interface (an abstract base class) that defines a set of rendering primitives. The application will be refactored to program against this interface, not a concrete SDL2 implementation.
|
||||
|
||||
### 3.1. The `IRenderer` Interface
|
||||
|
||||
A new interface, `IRenderer`, will be created. It will define the contract for all rendering operations.
|
||||
|
||||
**File:** `src/app/gfx/irenderer.h`
|
||||
|
||||
```cpp
|
||||
#pragma once
|
||||
|
||||
#include <SDL.h> // For SDL_Rect, SDL_Color, etc.
|
||||
#include <memory>
|
||||
#include <vector>
|
||||
|
||||
#include "app/gfx/bitmap.h"
|
||||
|
||||
namespace yaze {
|
||||
namespace gfx {
|
||||
|
||||
// Forward declarations
|
||||
class Bitmap;
|
||||
|
||||
// A handle to a texture, abstracting away the underlying implementation
|
||||
using TextureHandle = void*;
|
||||
|
||||
class IRenderer {
|
||||
public:
|
||||
virtual ~IRenderer() = default;
|
||||
|
||||
// --- Initialization and Lifecycle ---
|
||||
virtual bool Initialize(SDL_Window* window) = 0;
|
||||
virtual void Shutdown() = 0;
|
||||
|
||||
// --- Texture Management ---
|
||||
virtual TextureHandle CreateTexture(int width, int height) = 0;
|
||||
virtual void UpdateTexture(TextureHandle texture, const Bitmap& bitmap) = 0;
|
||||
virtual void DestroyTexture(TextureHandle texture) = 0;
|
||||
|
||||
// --- Rendering Primitives ---
|
||||
virtual void Clear() = 0;
|
||||
virtual void Present() = 0;
|
||||
virtual void RenderCopy(TextureHandle texture, const SDL_Rect* srcrect, const SDL_Rect* dstrect) = 0;
|
||||
virtual void SetRenderTarget(TextureHandle texture) = 0;
|
||||
virtual void SetDrawColor(SDL_Color color) = 0;
|
||||
|
||||
// --- Backend-specific Access ---
|
||||
// Provides an escape hatch for libraries like ImGui that need the concrete renderer.
|
||||
virtual void* GetBackendRenderer() = 0;
|
||||
};
|
||||
|
||||
} // namespace gfx
|
||||
} // namespace yaze
|
||||
```
|
||||
|
||||
### 3.2. The `SDL2Renderer` Implementation
|
||||
|
||||
A concrete class, `SDL2Renderer`, will be the first implementation of the `IRenderer` interface. It will encapsulate all the existing SDL2-specific rendering logic.
|
||||
|
||||
**File:** `src/app/gfx/sdl2_renderer.h` & `src/app/gfx/sdl2_renderer.cc`
|
||||
|
||||
```cpp
|
||||
// sdl2_renderer.h
|
||||
#include "app/gfx/irenderer.h"
|
||||
#include "util/sdl_deleter.h"
|
||||
|
||||
namespace yaze {
|
||||
namespace gfx {
|
||||
|
||||
class SDL2Renderer : public IRenderer {
|
||||
public:
|
||||
SDL2Renderer();
|
||||
~SDL2Renderer() override;
|
||||
|
||||
bool Initialize(SDL_Window* window) override;
|
||||
void Shutdown() override;
|
||||
|
||||
TextureHandle CreateTexture(int width, int height) override;
|
||||
void UpdateTexture(TextureHandle texture, const Bitmap& bitmap) override;
|
||||
void DestroyTexture(TextureHandle texture) override;
|
||||
|
||||
void Clear() override;
|
||||
void Present() override;
|
||||
void RenderCopy(TextureHandle texture, const SDL_Rect* srcrect, const SDL_Rect* dstrect) override;
|
||||
void SetRenderTarget(TextureHandle texture) override;
|
||||
void SetDrawColor(SDL_Color color) override;
|
||||
|
||||
void* GetBackendRenderer() override { return renderer_.get(); }
|
||||
|
||||
private:
|
||||
std::unique_ptr<SDL_Renderer, util::SDL_Deleter> renderer_;
|
||||
};
|
||||
|
||||
} // namespace gfx
|
||||
} // namespace yaze
|
||||
```
|
||||
|
||||
## 4. Migration Plan
|
||||
|
||||
The migration will be executed in phases to ensure stability and minimize disruption.
|
||||
|
||||
### Phase 1: Implement the Abstraction Layer
|
||||
|
||||
1. **Create `IRenderer` and `SDL2Renderer`:** Implement the interface and concrete class as defined above.
|
||||
2. **Refactor `core::Renderer` Singleton:** The existing `core::Renderer` singleton will be deprecated and removed. A new central mechanism (e.g., a service locator or passing the `IRenderer` instance) will provide access to the active renderer.
|
||||
3. **Update Application Entry Points:**
|
||||
* In `app/core/controller.cc` (for the main editor) and `app/emu/emu.cc` (for the emulator), instantiate `SDL2Renderer` during initialization. The `Controller` will own the `unique_ptr<IRenderer>`.
|
||||
* This immediately unifies the rendering pipeline initialization for both application modes.
|
||||
4. **Refactor `gfx` Library:**
|
||||
* **`gfx::Bitmap`:** Modify `CreateTexture` and `UpdateTexture` to accept an `IRenderer*` instead of an `SDL_Renderer*`. The `SDL_Texture*` will be replaced with the abstract `TextureHandle`.
|
||||
* **`gfx::Arena`:** The `AllocateTexture` method will now call `renderer->CreateTexture()`. The internal pools will store `TextureHandle`s.
|
||||
* **`gfx::AtlasRenderer`:** The `Initialize` method will take an `IRenderer*`. All calls to `SDL_RenderCopy`, `SDL_SetRenderTarget`, etc., will be replaced with calls to the corresponding methods on the `IRenderer` interface.
|
||||
5. **Update ImGui Integration:**
|
||||
* The ImGui backend requires the concrete `SDL_Renderer*`. The `GetBackendRenderer()` method on the interface provides a type-erased `void*` for this purpose.
|
||||
* The ImGui initialization code will be modified as follows:
|
||||
```cpp
|
||||
// Before
|
||||
ImGui_ImplSDLRenderer2_Init(sdl_renderer_ptr);
|
||||
|
||||
// After
|
||||
auto backend_renderer = renderer->GetBackendRenderer();
|
||||
ImGui_ImplSDLRenderer2_Init(static_cast<SDL_Renderer*>(backend_renderer));
|
||||
```
|
||||
|
||||
### Phase 2: Migrate to SDL3
|
||||
|
||||
With the abstraction layer in place, migrating to SDL3 becomes significantly simpler.
|
||||
|
||||
1. **Create `SDL3Renderer`:** A new class, `SDL3Renderer`, will be created that implements the `IRenderer` interface using SDL3's rendering functions.
|
||||
* This class will handle the differences in the SDL3 API (e.g., `SDL_CreateRendererWithProperties`, float-based rendering functions, etc.) internally.
|
||||
* The `TextureHandle` will now correspond to an `SDL_Texture*` from SDL3.
|
||||
2. **Update Build System:** The CMake files will be updated to link against SDL3 instead of SDL2.
|
||||
3. **Switch Implementation:** The application entry points (`controller.cc`, `emu.cc`) will be changed to instantiate `SDL3Renderer` instead of `SDL2Renderer`.
|
||||
|
||||
The rest of the application, which only knows about the `IRenderer` interface, will require **no changes**.
|
||||
|
||||
### Phase 3: Support for Multiple Rendering Backends
|
||||
|
||||
The `IRenderer` interface makes adding new backends a modular task.
|
||||
|
||||
1. **Implement New Backends:** Create new classes like `OpenGLRenderer`, `MetalRenderer`, or `VulkanRenderer`. Each will implement the `IRenderer` interface using the corresponding graphics API.
|
||||
2. **Backend Selection:** Implement a factory function or a strategy in the main controller to select and create the desired renderer at startup, based on platform, user configuration, or command-line flags.
|
||||
3. **ImGui Backend Alignment:** When a specific backend is chosen for `yaze`, the corresponding ImGui backend implementation must also be used (e.g., `ImGui_ImplOpenGL3_Init`, `ImGui_ImplMetal_Init`). The `GetBackendRenderer()` method will provide the necessary context (e.g., `ID3D11Device*`, `MTLDevice*`) for each implementation.
|
||||
|
||||
## 5. Conclusion
|
||||
|
||||
This plan transforms the rendering system from a tightly coupled, monolithic design into a flexible, modular, and future-proof architecture.
|
||||
|
||||
**Benefits:**
|
||||
|
||||
- **Maintainability:** Rendering logic is centralized and isolated, making it easier to debug and maintain.
|
||||
- **Extensibility:** Adding support for new rendering APIs (like SDL3, Vulkan, Metal) becomes a matter of implementing a new interface, not refactoring the entire application.
|
||||
- **Testability:** The rendering interface can be mocked, allowing for unit testing of graphics components without a live rendering context.
|
||||
- **Future-Proofing:** The application is no longer tied to a specific version of SDL, ensuring a smooth transition to future graphics technologies.
|
||||
247
docs/G3-palete-system-overview.md
Normal file
247
docs/G3-palete-system-overview.md
Normal file
@@ -0,0 +1,247 @@
|
||||
# SNES Palette System Overview
|
||||
|
||||
## Understanding SNES Color and Palette Organization
|
||||
|
||||
### Core Concepts
|
||||
|
||||
#### 1. SNES Color Format (15-bit BGR555)
|
||||
- **Storage**: 2 bytes per color (16 bits total, 15 bits used)
|
||||
- **Format**: `0BBB BBGG GGGR RRRR`
|
||||
- Bits 0-4: Red (5 bits, 0-31)
|
||||
- Bits 5-9: Green (5 bits, 0-31)
|
||||
- Bits 10-14: Blue (5 bits, 0-31)
|
||||
- Bit 15: Unused (always 0)
|
||||
- **Range**: Each channel has 32 levels (0-31)
|
||||
- **Total Colors**: 32,768 possible colors (2^15)
|
||||
|
||||
#### 2. Palette Groups in Zelda 3
|
||||
Zelda 3 organizes palettes into logical groups for different game areas and entities:
|
||||
|
||||
```cpp
|
||||
struct PaletteGroupMap {
|
||||
PaletteGroup overworld_main; // Main overworld graphics (35 colors each)
|
||||
PaletteGroup overworld_aux; // Auxiliary overworld (21 colors each)
|
||||
PaletteGroup overworld_animated; // Animated colors (7 colors each)
|
||||
PaletteGroup hud; // HUD graphics (32 colors each)
|
||||
PaletteGroup global_sprites; // Sprite palettes (60 colors each)
|
||||
PaletteGroup armors; // Armor colors (15 colors each)
|
||||
PaletteGroup swords; // Sword colors (3 colors each)
|
||||
PaletteGroup shields; // Shield colors (4 colors each)
|
||||
PaletteGroup sprites_aux1; // Auxiliary sprite palette 1 (7 colors each)
|
||||
PaletteGroup sprites_aux2; // Auxiliary sprite palette 2 (7 colors each)
|
||||
PaletteGroup sprites_aux3; // Auxiliary sprite palette 3 (7 colors each)
|
||||
PaletteGroup dungeon_main; // Dungeon palettes (90 colors each)
|
||||
PaletteGroup grass; // Grass colors (special handling)
|
||||
PaletteGroup object_3d; // 3D object palettes (8 colors each)
|
||||
PaletteGroup overworld_mini_map; // Mini-map palettes (128 colors each)
|
||||
};
|
||||
```
|
||||
|
||||
### Dungeon Palette System
|
||||
|
||||
#### Structure
|
||||
- **20 dungeon palettes** in the `dungeon_main` group
|
||||
- **90 colors per palette** (full SNES palette for BG layers)
|
||||
- **ROM Location**: `kDungeonMainPalettes` (check `snes_palette.cc` for exact address)
|
||||
|
||||
#### Usage
|
||||
```cpp
|
||||
// Loading a dungeon palette
|
||||
auto& dungeon_pal_group = rom->palette_group().dungeon_main;
|
||||
int num_palettes = dungeon_pal_group.size(); // Should be 20
|
||||
int palette_id = room.palette; // Room's palette ID (0-19)
|
||||
|
||||
// IMPORTANT: Use operator[] not palette() method!
|
||||
auto palette = dungeon_pal_group[palette_id]; // Returns reference
|
||||
// NOT: auto palette = dungeon_pal_group.palette(palette_id); // Returns copy!
|
||||
```
|
||||
|
||||
#### Color Distribution (90 colors)
|
||||
The 90 colors are typically distributed as:
|
||||
- **BG1 Palette** (Background Layer 1): First 8-16 subpalettes
|
||||
- **BG2 Palette** (Background Layer 2): Next 8-16 subpalettes
|
||||
- **Sprite Palettes**: Remaining colors (handled separately)
|
||||
|
||||
Each "subpalette" is 16 colors (one SNES palette unit).
|
||||
|
||||
### Overworld Palette System
|
||||
|
||||
#### Structure
|
||||
- **Main Overworld**: 35 colors per palette
|
||||
- **Auxiliary**: 21 colors per palette
|
||||
- **Animated**: 7 colors per palette (for water, lava effects)
|
||||
|
||||
#### 3BPP Graphics and Left/Right Palettes
|
||||
Overworld graphics use 3BPP (3 bits per pixel) format:
|
||||
- **8 colors per tile** (2^3 = 8)
|
||||
- **Left Side**: Uses palette 0-7
|
||||
- **Right Side**: Uses palette 8-15
|
||||
|
||||
When decompressing 3BPP graphics:
|
||||
```cpp
|
||||
// Palette assignment for 3BPP overworld tiles
|
||||
if (tile_position < half_screen_width) {
|
||||
// Left side of screen
|
||||
tile_palette_offset = 0; // Use colors 0-7
|
||||
} else {
|
||||
// Right side of screen
|
||||
tile_palette_offset = 8; // Use colors 8-15
|
||||
}
|
||||
```
|
||||
|
||||
### Common Issues and Solutions
|
||||
|
||||
#### Issue 1: Empty Palette
|
||||
**Symptom**: "Palette size: 0 colors"
|
||||
**Cause**: Using `palette()` method instead of `operator[]`
|
||||
**Solution**:
|
||||
```cpp
|
||||
// WRONG:
|
||||
auto palette = group.palette(id); // Returns copy, may be empty
|
||||
|
||||
// CORRECT:
|
||||
auto palette = group[id]; // Returns reference
|
||||
```
|
||||
|
||||
#### Issue 2: Bitmap Corruption
|
||||
**Symptom**: Graphics render only in top portion of image
|
||||
**Cause**: Wrong depth parameter in `CreateAndRenderBitmap`
|
||||
**Solution**:
|
||||
```cpp
|
||||
// WRONG:
|
||||
CreateAndRenderBitmap(0x200, 0x200, 0x200, data, bitmap, palette);
|
||||
// depth ^^^^ should be 8!
|
||||
|
||||
// CORRECT:
|
||||
CreateAndRenderBitmap(0x200, 0x200, 8, data, bitmap, palette);
|
||||
// width, height, depth=8 bits
|
||||
```
|
||||
|
||||
#### Issue 3: ROM Not Loaded in Preview
|
||||
**Symptom**: "ROM not loaded" error in emulator preview
|
||||
**Cause**: Initializing before ROM is set
|
||||
**Solution**:
|
||||
```cpp
|
||||
// Initialize emulator preview AFTER ROM is loaded and set
|
||||
void Load() {
|
||||
// ... load ROM data ...
|
||||
// ... set up other components ...
|
||||
|
||||
// NOW initialize emulator preview with loaded ROM
|
||||
object_emulator_preview_.Initialize(rom_);
|
||||
}
|
||||
```
|
||||
|
||||
### Palette Editor Integration
|
||||
|
||||
#### Key Functions for UI
|
||||
```cpp
|
||||
// Reading a color from ROM
|
||||
absl::StatusOr<uint16_t> ReadColorFromRom(uint32_t address, const uint8_t* rom);
|
||||
|
||||
// Converting SNES color to RGB
|
||||
SnesColor color(snes_value); // snes_value is uint16_t
|
||||
uint8_t r = color.red(); // 0-255 (converted from 0-31)
|
||||
uint8_t g = color.green(); // 0-255
|
||||
uint8_t b = color.blue(); // 0-255
|
||||
|
||||
// Writing color back to ROM
|
||||
uint16_t snes_value = color.snes(); // Get 15-bit BGR555 value
|
||||
rom->WriteByte(address, snes_value & 0xFF); // Low byte
|
||||
rom->WriteByte(address + 1, (snes_value >> 8) & 0xFF); // High byte
|
||||
```
|
||||
|
||||
#### Palette Widget Requirements
|
||||
1. **Display**: Show colors in organized grids (16 colors per row for SNES standard)
|
||||
2. **Selection**: Allow clicking to select a color
|
||||
3. **Editing**: Provide RGB sliders (0-255) or color picker
|
||||
4. **Conversion**: Auto-convert RGB (0-255) ↔ SNES (0-31) values
|
||||
5. **Preview**: Show before/after comparison
|
||||
6. **Save**: Write modified palette back to ROM
|
||||
|
||||
### Graphics Manager Integration
|
||||
|
||||
#### Sheet Palette Assignment
|
||||
```cpp
|
||||
// Assigning palette to graphics sheet
|
||||
if (sheet_id > 115) {
|
||||
// Sprite sheets use sprite palette
|
||||
graphics_sheet.SetPaletteWithTransparent(
|
||||
rom.palette_group().global_sprites[0], 0);
|
||||
} else {
|
||||
// Dungeon sheets use dungeon palette
|
||||
graphics_sheet.SetPaletteWithTransparent(
|
||||
rom.palette_group().dungeon_main[0], 0);
|
||||
}
|
||||
```
|
||||
|
||||
### Best Practices
|
||||
|
||||
1. **Always use `operator[]` for palette access** - returns reference, not copy
|
||||
2. **Validate palette IDs** before accessing:
|
||||
```cpp
|
||||
if (palette_id >= 0 && palette_id < group.size()) {
|
||||
auto palette = group[palette_id];
|
||||
}
|
||||
```
|
||||
3. **Use correct depth parameter** when creating bitmaps (usually 8 for indexed color)
|
||||
4. **Initialize ROM-dependent components** only after ROM is fully loaded
|
||||
5. **Cache palettes** when repeatedly accessing the same palette
|
||||
6. **Update textures** after changing palettes (textures don't auto-update)
|
||||
|
||||
### ROM Addresses (for reference)
|
||||
|
||||
```cpp
|
||||
// From snes_palette.cc
|
||||
constexpr uint32_t kOverworldPaletteMain = 0xDE6C8;
|
||||
constexpr uint32_t kOverworldPaletteAux = 0xDE86C;
|
||||
constexpr uint32_t kOverworldPaletteAnimated = 0xDE604;
|
||||
constexpr uint32_t kHudPalettes = 0xDD218;
|
||||
constexpr uint32_t kGlobalSpritesLW = 0xDD308;
|
||||
constexpr uint32_t kArmorPalettes = 0xDD630;
|
||||
constexpr uint32_t kSwordPalettes = 0xDD630;
|
||||
constexpr uint32_t kShieldPalettes = 0xDD648;
|
||||
constexpr uint32_t kSpritesPalettesAux1 = 0xDD39E;
|
||||
constexpr uint32_t kSpritesPalettesAux2 = 0xDD446;
|
||||
constexpr uint32_t kSpritesPalettesAux3 = 0xDD4E0;
|
||||
constexpr uint32_t kDungeonMainPalettes = 0xDD734;
|
||||
constexpr uint32_t kHardcodedGrassLW = 0x5FEA9;
|
||||
constexpr uint32_t kTriforcePalette = 0xF4CD0;
|
||||
constexpr uint32_t kOverworldMiniMapPalettes = 0x55B27;
|
||||
```
|
||||
|
||||
## Recent Fixes Applied
|
||||
|
||||
### Fix 1: Palette Access Method (2025-01-07)
|
||||
- **File**: `room.cc`
|
||||
- **Change**: Use `dungeon_pal_group[palette_id]` instead of `dungeon_pal_group.palette(palette_id)`
|
||||
- **Result**: Palettes now load correctly with 90 colors
|
||||
|
||||
### Fix 2: Bitmap Depth Parameter (2025-01-07)
|
||||
- **File**: `room.cc`
|
||||
- **Change**: Changed depth from `0x200` to `8` in `CreateAndRenderBitmap`
|
||||
- **Result**: Room graphics now render correctly across full bitmap
|
||||
|
||||
### Fix 3: Emulator Preview Initialization (2025-01-07)
|
||||
- **File**: `dungeon_editor_v2.cc`
|
||||
- **Change**: Moved `object_emulator_preview_.Initialize(rom_)` from `Initialize()` to `Load()`
|
||||
- **Result**: Emulator preview now correctly detects loaded ROM
|
||||
|
||||
## Next Steps
|
||||
|
||||
1. **Palette Editor Enhancements**
|
||||
- Add visual palette grid display
|
||||
- Implement color picker integration
|
||||
- Add undo/redo for palette changes
|
||||
- Show ROM addresses for each palette
|
||||
|
||||
2. **Overworld Color Math Fix**
|
||||
- Review and correct overworld entity color calculations
|
||||
- Ensure 3BPP left/right palette assignment is correct
|
||||
- Test with multiple overworld areas
|
||||
|
||||
3. **Documentation**
|
||||
- Add inline comments explaining palette access patterns
|
||||
- Create visual diagrams for palette organization
|
||||
- Document palette editing workflows
|
||||
|
||||
Reference in New Issue
Block a user