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mesa: optimize no-change check in _mesa_BlendEquationSeparate()

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Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Brian Paul
2015-10-14 09:45:36 -06:00
parent 2dfedf105d
commit 34de3c4c16
1 changed files with 26 additions and 15 deletions
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src/mesa/main/blend.c
+26 -15
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@@ -432,7 +432,7 @@ void GLAPIENTRY
_mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA )
{
GLuint buf, numBuffers;
GLboolean changed;
bool changed = false;
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
@@ -440,6 +440,30 @@ _mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA )
_mesa_enum_to_string(modeRGB),
_mesa_enum_to_string(modeA));
numBuffers = ctx->Extensions.ARB_draw_buffers_blend
? ctx->Const.MaxDrawBuffers : 1;
if (ctx->Color._BlendEquationPerBuffer) {
/* Check all per-buffer states */
for (buf = 0; buf < numBuffers; buf++) {
if (ctx->Color.Blend[buf].EquationRGB != modeRGB ||
ctx->Color.Blend[buf].EquationA != modeA) {
changed = true;
break;
}
}
}
else {
/* only need to check 0th per-buffer state */
if (ctx->Color.Blend[0].EquationRGB != modeRGB ||
ctx->Color.Blend[0].EquationA != modeA) {
changed = true;
}
}
if (!changed)
return;
if ( (modeRGB != modeA) && !ctx->Extensions.EXT_blend_equation_separate ) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBlendEquationSeparateEXT not supported by driver");
@@ -456,21 +480,8 @@ _mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA )
return;
}
numBuffers = ctx->Extensions.ARB_draw_buffers_blend
? ctx->Const.MaxDrawBuffers : 1;
changed = GL_FALSE;
for (buf = 0; buf < numBuffers; buf++) {
if (ctx->Color.Blend[buf].EquationRGB != modeRGB ||
ctx->Color.Blend[buf].EquationA != modeA) {
changed = GL_TRUE;
break;
}
}
if (!changed)
return;
FLUSH_VERTICES(ctx, _NEW_COLOR);
for (buf = 0; buf < numBuffers; buf++) {
ctx->Color.Blend[buf].EquationRGB = modeRGB;
ctx->Color.Blend[buf].EquationA = modeA;