Don't make dst copies when color stage requires dst but color writes are disabled.

R=robertphillips@google.com

Review URL: https://codereview.chromium.org/15001035

git-svn-id: http://skia.googlecode.com/svn/trunk@9146 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 8 insertions, 4 deletions

diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 068f32110e..64893b461a 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -973,12 +973,14 @@ void GrContext::drawRRect(const GrPaint& paint,
     GrDrawTarget* target = this->prepareToDraw(&paint, BUFFERED_DRAW);
     GrDrawState::AutoStageDisable atr(fDrawState);
 
-    bool prAA = paint.isAntiAlias() && !this->getRenderTarget()->isMultisampled();
+    bool useAA = paint.isAntiAlias() &&
+                 !this->getRenderTarget()->isMultisampled() &&
+                 !disable_coverage_aa_for_blend(target);
 
-    if (!fOvalRenderer->drawSimpleRRect(target, this, prAA, rect, stroke)) {
+    if (!fOvalRenderer->drawSimpleRRect(target, this, useAA, rect, stroke)) {
         SkPath path;
         path.addRRect(rect);
-        this->internalDrawPath(target, prAA, path, stroke);
+        this->internalDrawPath(target, useAA, path, stroke);
     }
 }
 
@@ -991,7 +993,9 @@ void GrContext::drawOval(const GrPaint& paint,
     GrDrawTarget* target = this->prepareToDraw(&paint, BUFFERED_DRAW);
     GrDrawState::AutoStageDisable atr(fDrawState);
 
-    bool useAA = paint.isAntiAlias() && !this->getRenderTarget()->isMultisampled();
+    bool useAA = paint.isAntiAlias() &&
+                 !this->getRenderTarget()->isMultisampled() &&
+                 !disable_coverage_aa_for_blend(target);
 
     if (!fOvalRenderer->drawOval(target, this, useAA, oval, stroke)) {
         SkPath path;