Fixed two critical bugs preventing multiple textured sprites from rendering correctly:
1. **setState consumed by submit**: Render state was set once at the beginning,
but bgfx consumes state at each submit(). Batches 2+ had no state → invisible.
FIX: Call setState() before EACH batch, not once globally.
2. **Buffer overwrite race condition**: updateBuffer() is immediate but submit()
is deferred. When batch 2 called updateBuffer(), it overwrote batch 1's data
BEFORE bgfx executed the draw calls. All batches used the last batch's data
→ all sprites rendered at the same position (superimposed).
FIX: Use transient buffers (one per batch, frame-local) instead of reusing
the same dynamic buffer. Each batch gets its own isolated memory.
Changes:
- SpritePass: setState before each batch + transient buffer allocation per batch
- UIRenderer: Retained mode rendering (render:sprite:add/update/remove)
- test_ui_showcase: Added 3 textured buttons demo section
- test_3buttons_minimal: Minimal test case for multi-texture debugging
Tested: 3 textured buttons now render at correct positions with correct textures.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Fix JsonDataNode::getChildReadOnly() to handle JSON array access by numeric index
- Fix test_ui_showcase to use JSON array for children (matching test_single_button pattern)
- Add visual test files: test_single_button, test_ui_showcase, test_sprite_debug
- Clean up debug logging from SpritePass, SceneCollector, UIButton, BgfxDevice
The root cause was that UITree couldn't access array children in JSON layouts.
UIButton hover/click now works correctly in both test files.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add BGFX_CONFIG_MULTITHREADED=0 to fix TLS crash when bgfx runs from DLL
- Add -include stdint.h for MinGW GCC 15+ compatibility with bgfx third-party code
- Guard SDL2-dependent visual tests with if(SDL2_FOUND)
- Clean up debug logging in BgfxDevice::frame() and BgfxRendererModule::process()
- Re-enable all modules in test_full_stack_interactive.cpp
- Add grove::fs namespace for cross-platform filesystem operations
- Add InputModule C export for feedEvent across DLL boundary
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Phase 7 - Text Rendering:
- Add BitmapFont with embedded 8x8 CP437 font (ASCII 32-126)
- Add TextPass for instanced glyph rendering
- Fix SceneCollector::parseText() to copy strings to FrameAllocator
Phase 8A - Multi-texture Support:
- Add numeric texture ID system in ResourceCache
- SpritePass sorts by textureId and batches per texture
- Flush batch on texture change for efficient rendering
Phase 8B - Tilemap Rendering:
- Add TilemapPass for grid-based tile rendering
- Support tileData as comma-separated string
- Tiles rendered as instanced quads
Window Resize:
- Handle window resize via process() input
- Call bgfx::reset() on size change
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Create proper sprite shader (vs_sprite.sc, fs_sprite.sc) with GPU instancing
- SpriteInstance struct now 80 bytes (5 x vec4) for GPU layout compatibility
- Add BufferDesc::Layout enum (Raw, PosColor, InstanceData) for proper vertex layouts
- BgfxDevice creates correct VertexLayout based on buffer type
- SpritePass uses PosColor layout for quad vertices (Position + Color0)
- Instance buffer uses 5 x vec4 layout (TexCoord7-3) for i_data0-4
- Add texture support with v_texcoord0 interpolation from instance UVs
- Create default white 1x1 texture fallback
- Compile shaders for SPIRV (Vulkan), GLSL (OpenGL), and Metal
Visual test confirms sprites render correctly at ~545 FPS.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Add complete BgfxRenderer module structure (24 files)
- RHI abstraction layer (no bgfx:: exposed outside BgfxDevice.cpp)
- Frame system with lock-free allocator
- RenderGraph with ClearPass, SpritePass, DebugPass
- SceneCollector for IIO message parsing (render:* topics)
- ResourceCache with thread-safe texture/shader caching
- Full IModule integration (config via IDataNode, comm via IIO)
- CMake with FetchContent for bgfx
- Windows build script (build_renderer.bat)
- Documentation (README.md, USER_GUIDE.md, PLAN_BGFX_RENDERER.md)
- Updated .gitignore for Windows builds
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
