Replace no-op audio stubs in SDL2Types.h with real SDL2_mixer-backed
implementations of SoundBuffer, Sound, and Music. This enables audio
playback in the browser with zero changes to Python bindings.
- Add -sUSE_SDL_MIXER=2 to Emscripten compile/link flags (CMakeLists.txt)
- Initialize Mix_OpenAudio in SDL2Renderer::init(), Mix_CloseAudio in shutdown()
- SoundBuffer: Mix_LoadWAV/Mix_LoadWAV_RW with duration computation
- Sound: channel-based playback with Mix_ChannelFinished tracking
- Music: global channel streaming via Mix_LoadMUS/Mix_PlayMusic
- Volume conversion: SFML 0-100 scale to SDL_mixer 0-128 scale
Known limitations on web: Music.duration and Music.position getters
return 0 (SDL_mixer 2.0.2 lacks Mix_MusicDuration/Mix_GetMusicPosition).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add -sUSE_FREETYPE=1 to Emscripten build flags
- Extend Font class with FT_Library, FT_Face, and FT_Stroker handles
- Rewrite FontAtlas to use FreeType with on-demand stroked glyph loading
- Text outlines now use FT_Stroker for vector-based stroking before
rasterization, eliminating gaps at corners with thick outlines
- Use glTexSubImage2D for incremental atlas updates (major perf fix)
- Disable canvas border in shell.html per Emscripten docs (alignment fix)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The FontAtlas class was missing move semantics, causing the GPU texture
to be deleted immediately after creation. When FontAtlas was moved into
the cache with std::move(), the default move constructor copied textureId_,
then the original's destructor deleted the texture the cache was using.
Added:
- Move constructor that transfers ownership and clears source textureId_
- Move assignment operator with proper cleanup of existing resources
- Deleted copy operations since GPU textures can't be shared
Also cleaned up the text fragment shader to use proper alpha sampling.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Text rendering fix:
- Add ShaderType parameter to drawTriangles() to allow explicit shader selection
- Text::draw() now properly uses text shader (alpha-only sampling)
- Previously drawTriangles() always overrode to sprite shader
RenderTexture fix:
- Add pushRenderState/popRenderState to save/restore viewport and projection
- RenderTexture::clear() now sets viewport/projection to FBO dimensions
- RenderTexture::display() restores previous state
- This fixes grid rendering which uses RenderTexture for tile chunks
Co-Authored-By: Claude <noreply@anthropic.com>
