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add notes explaining emscripten considerations

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veclavtalica 2025-02-22 16:19:22 +03:00
parent ce7240d423
commit 62866d33ae
2 changed files with 6 additions and 0 deletions
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2
src/rendering/twn_draw_c.h
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@ -37,6 +37,8 @@ enum {
TWN_UNSIGNED_BYTE, TWN_UNSIGNED_BYTE,
}; };
/* note: they're separate as on some targets they are not interchangeable like in opengl */
/* emscripten legacy gl emulation, for example, assumes first bind to be decisive in its future usage */
typedef uint32_t VertexBuffer; typedef uint32_t VertexBuffer;
typedef uint32_t IndexBuffer; typedef uint32_t IndexBuffer;

4
src/rendering/twn_gl_15_rendering.c
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@ -14,6 +14,10 @@
#endif #endif
#include <stb_ds.h> #include <stb_ds.h>
/* note: care must be taken to always have interleaved VBOs with all data, */
/* as it is optimized in emscripten legacy gl emulation. */
/* constant color isn't supported there, so care must be given to provide alternative path with VBO as well. */
static TextureMode texture_mode_last_used = TEXTURE_MODE_UNKNOWN; static TextureMode texture_mode_last_used = TEXTURE_MODE_UNKNOWN;
static Pipeline pipeline_last_used = PIPELINE_NO; static Pipeline pipeline_last_used = PIPELINE_NO;