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Optimize glUniform1iv and glUniform4fv to use faster glUniform1i and glUniform4f on WebGL.

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Jukka Jylänki 2020-03-17 17:05:13 +02:00 committed by Бранимир Караџић
parent bab9dc752e
commit 4a8276cb29
1 changed files with 14 additions and 0 deletions
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14
src/renderer_gl.cpp
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@ -3786,8 +3786,22 @@ namespace bgfx { namespace gl
switch (type)
{
#if BX_PLATFORM_EMSCRIPTEN
// For WebAssembly the array forms glUniform1iv/glUniform4fv are much slower compared to glUniform1i/glUniform4f
// since they need to marshal an array over from Wasm to JS, so optimize the case when there is exactly one
// uniform to upload.
case UniformType::Sampler:
if (num > 1) glUniform1iv(loc, num, (int*)data);
else glUniform1i(loc, *(int*)data);
break;
case UniformType::Vec4:
if (num > 1) glUniform4fv(loc, num, (float*)data);
else glUniform4f(loc, ((float*)data)[0], ((float*)data)[1], ((float*)data)[2], ((float*)data)[3]);
break;
#else
CASE_IMPLEMENT_UNIFORM(Sampler, 1iv, I, int);
CASE_IMPLEMENT_UNIFORM(Vec4, 4fv, F, float);
#endif
CASE_IMPLEMENT_UNIFORM_T(Mat3, Matrix3fv, F, float);
CASE_IMPLEMENT_UNIFORM_T(Mat4, Matrix4fv, F, float);