Use draw buffer for texture copy impl.

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index f8eca3682beec53c9357f718fb41883e38cbeeb8..f22d4dab2de73df8cd619f9188252f1c973ea5a1 100755
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -1583,8 +1583,9 @@ void GrContext::copyTexture(GrTexture* src, GrRenderTarget* dst, const SkIPoint*
         this->flush();
     }
 

[robertphillips, 2014/09/23 13:21:53]

So this prepareToDraw call does a bit of work on the DrawState we're not going
to use. Would it make more sense after the ASR?

[bsalomon, 2014/09/23 15:08:57]

I think there is a larger change coming related to not making GrGpu a GrDT
subclass. Right now this function still applies the override to kYes_

I did just realize that this should turn off the clip bit on GrDrawState. Will
fix that.

-    GrDrawTarget::AutoStateRestore asr(fGpu, GrDrawTarget::kReset_ASRInit);
-    GrDrawState* drawState = fGpu->drawState();
+    GrDrawTarget* target = this->prepareToDraw(NULL, kYes_BufferedDraw, NULL, NULL);
+    GrDrawTarget::AutoStateRestore asr(target, GrDrawTarget::kReset_ASRInit);
+    GrDrawState* drawState = target->drawState();
     drawState->setRenderTarget(dst);
     SkMatrix sampleM;
     sampleM.setIDiv(src->width(), src->height());
@@ -1599,7 +1600,7 @@ void GrContext::copyTexture(GrTexture* src, GrRenderTarget* dst, const SkIPoint*
     sampleM.preTranslate(SkIntToScalar(srcRect.fLeft), SkIntToScalar(srcRect.fTop));
     drawState->addColorTextureEffect(src, sampleM);
     SkRect dstR = SkRect::MakeWH(SkIntToScalar(srcRect.width()), SkIntToScalar(srcRect.height()));
-    fGpu->drawSimpleRect(dstR);
+    target->drawSimpleRect(dstR);
 }
 
 bool GrContext::writeRenderTargetPixels(GrRenderTarget* target,