From: Brian Paul <brianp@vmware.com>
Date: Wed, 14 Oct 2015 16:08:18 +0000 (-0600)
Subject: mesa: optimize _UsesDualSrc blend flag setting
X-Git-Tag: upstream/17.1.0~15347
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dfbd62e772d4373f4ab7553b556931085a70488a;p=platform%2Fupstream%2Fmesa.git

mesa: optimize _UsesDualSrc blend flag setting

For glBlendFunc and glBlendFuncSeparate(), the _UsesDualSrc flag
will be the same for all buffers, so no need to compute it N times.

Reviewed-by: Eric Anholt <eric@anholt.net>
---

diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index a7b7c5b..9dec2d4 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) {