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Made iOS use glBufferData instead of glBufferSubData, which turned out to be the synchronization bottleneck.
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+3
SDL_gpu/GLES_2/SDL_gpu_GLES_2.c
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SDL_gpu/GLES_2/SDL_gpu_GLES_2.c
···
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// Most of the code pulled in from here...
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#define SDL_GPU_USE_GLES
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#define SDL_GPU_USE_BUFFER_PIPELINE
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#ifdef __IPHONEOS__
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#define SDL_GPU_USE_BUFFER_RESET
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#endif
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#define SDL_GPU_SKIP_ENABLE_TEXTURE_2D
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#define SDL_GPU_ASSUME_SHADERS
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#define SDL_GPU_GL_TIER 3
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SDL_gpu/GLES_2/SDL_gpu_GLES_2.h
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SDL_gpu/GLES_2/SDL_gpu_GLES_2.h
···
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#define glVertexAttribI1ui glVertexAttrib1f
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#define glVertexAttribI2ui glVertexAttrib2f
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#define glVertexAttribI3ui glVertexAttrib3f
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#define glVertexAttribI4ui glVertexAttrib4f
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#define glVertexAttribI4ui glVertexAttrib4f
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#define glMapBuffer glMapBufferOES
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#define glUnmapBuffer glUnmapBufferOES
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#define GL_WRITE_ONLY GL_WRITE_ONLY_OES
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#endif
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-8
SDL_gpu/GL_common/SDL_gpu_GL_common.inl
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-8
SDL_gpu/GL_common/SDL_gpu_GL_common.inl
···
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static_inline void submit_buffer_data(int bytes, float* values)
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{
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#ifdef SDL_GPU_USE_MAP_BUFFER
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float* data = (float*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
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if(data == NULL)
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return;
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#ifdef SDL_GPU_USE_BUFFER_PIPELINE
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#ifdef SDL_GPU_USE_BUFFER_MAPPING
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float* data = (float*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
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if(data == NULL)
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return;
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memcpy(data, values, bytes);
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memcpy(data, values, bytes);
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glUnmapBuffer(GL_ARRAY_BUFFER);
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#else
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glBufferSubData(GL_ARRAY_BUFFER, 0, bytes, values);
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glUnmapBuffer(GL_ARRAY_BUFFER);
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#elif defined(SDL_GPU_USE_BUFFER_RESET)
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glBufferData(GL_ARRAY_BUFFER, bytes, values, GL_STREAM_DRAW);
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#else
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glBufferSubData(GL_ARRAY_BUFFER, 0, bytes, values);
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#endif
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#endif
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}
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