[Mesa-dev] [PATCH 08/10] mesa: optimize _UsesDualSrc blend flag setting

[Brian Paul]

For glBlendFunc and glBlendFuncSeparate(), the _UsesDualSrc flag
will be the same for all buffers, so no need to compute it N times.
---
 src/mesa/main/blend.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index f14949f..6e27cf9 100644
--- a/src/mesa/main/blend.c
+++ b/src/mesa/main/blend.c
@@ -255,8 +255,13 @@ _mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB,
       ctx->Color.Blend[buf].DstRGB = dfactorRGB;
       ctx->Color.Blend[buf].SrcA = sfactorA;
       ctx->Color.Blend[buf].DstA = dfactorA;
-      update_uses_dual_src(ctx, buf);
    }
+
+   update_uses_dual_src(ctx, 0);
+   for (buf = 1; buf < numBuffers; buf++) {
+      ctx->Color.Blend[buf]._UsesDualSrc = ctx->Color.Blend[0]._UsesDualSrc;
+   }
+
    ctx->Color._BlendFuncPerBuffer = GL_FALSE;
 
    if (ctx->Driver.BlendFuncSeparate) {
-- 
1.9.1