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authorBrian Paul <[email protected]>2015-10-14 09:41:11 -0600
committerBrian Paul <[email protected]>2015-10-15 07:21:07 -0600
commit2dfedf105d07e9a1f65f9bc76369cb33edf59cc9 (patch)
tree354f22c94915cfa3a0c258966665f3f58ffb6d26
parent6fd29e6c31e14e7b0f3c530798a1fc983eee17af (diff)
mesa: optimize no-change check in _mesa_BlendEquation()
Same story as preceeding change to _mesa_BlendFuncSeparate(). Reviewed-by: Eric Anholt <[email protected]>
-rw-r--r--src/mesa/main/blend.c35
1 files changed, 23 insertions, 12 deletions
diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index 98d28581d26..01b69194814 100644
--- a/src/mesa/main/blend.c
+++ b/src/mesa/main/blend.c
@@ -345,33 +345,44 @@ void GLAPIENTRY
_mesa_BlendEquation( GLenum mode )
{
GLuint buf, numBuffers;
- GLboolean changed;
+ bool changed = false;
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glBlendEquation(%s)\n",
_mesa_enum_to_string(mode));
- if (!legal_blend_equation(ctx, mode)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
- 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 != mode ||
- ctx->Color.Blend[buf].EquationA != mode) {
- changed = GL_TRUE;
- break;
+ if (ctx->Color._BlendEquationPerBuffer) {
+ /* Check all per-buffer states */
+ for (buf = 0; buf < numBuffers; buf++) {
+ if (ctx->Color.Blend[buf].EquationRGB != mode ||
+ ctx->Color.Blend[buf].EquationA != mode) {
+ changed = true;
+ break;
+ }
+ }
+ }
+ else {
+ /* only need to check 0th per-buffer state */
+ if (ctx->Color.Blend[0].EquationRGB != mode ||
+ ctx->Color.Blend[0].EquationA != mode) {
+ changed = true;
}
}
+
if (!changed)
return;
+ if (!legal_blend_equation(ctx, mode)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
+ return;
+ }
+
FLUSH_VERTICES(ctx, _NEW_COLOR);
+
for (buf = 0; buf < numBuffers; buf++) {
ctx->Color.Blend[buf].EquationRGB = mode;
ctx->Color.Blend[buf].EquationA = mode;