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Optimization: only call pglUseProgram if shader actually needs changing

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This commit is contained in:
Hannu Hanhi 2020-04-19 01:54:46 +03:00
parent 0758a8caec
commit c0c095e1d1
1 changed files with 11 additions and 2 deletions
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13
src/hardware/r_opengl/r_opengl.c
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@ -583,6 +583,7 @@ static PFNglGetUniformLocation pglGetUniformLocation;
static char *gl_customvertexshaders[MAXSHADERS];
static char *gl_customfragmentshaders[MAXSHADERS];
static GLuint gl_currentshaderprogram = 0;
static boolean gl_shaderprogramchanged = true;
// 13062019
typedef enum
@ -1058,8 +1059,12 @@ EXPORT void HWRAPI(SetShader) (int shader)
#ifdef GL_SHADERS
if (gl_allowshaders)
{
if ((GLuint)shader != gl_currentshaderprogram)
{
gl_currentshaderprogram = shader;
gl_shaderprogramchanged = true;
}
gl_shadersenabled = true;
gl_currentshaderprogram = shader;
return;
}
#else
@ -1868,7 +1873,11 @@ static void *Shader_Load(FSurfaceInfo *Surface, GLRGBAFloat *poly, GLRGBAFloat *
gl_shaderprogram_t *shader = &gl_shaderprograms[gl_currentshaderprogram];
if (shader->program)
{
pglUseProgram(gl_shaderprograms[gl_currentshaderprogram].program);
if (gl_shaderprogramchanged)
{
pglUseProgram(gl_shaderprograms[gl_currentshaderprogram].program);
gl_shaderprogramchanged = false;
}
Shader_SetUniforms(Surface, poly, tint, fade);
return shader;
}