Set scissor to clip bounding box when using GrConvexPolyEffect

src/gpu/GrClipMaskManager.cpp

Index: src/gpu/GrClipMaskManager.cpp
diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 340ede0d314484247d892cf66324c90ba6715e71..c1c59734ab50b6f133891dd388583bd68dc15fce 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -174,7 +174,9 @@ bool GrClipMaskManager::setupClipping(const GrClipData* clipDataIn,
         if (effect) {
             are->set(fGpu->drawState());
             fGpu->drawState()->addCoverageEffect(effect);
-            fGpu->disableScissor();
+            SkIRect scissorSpaceIBounds(clipSpaceIBounds);

[bsalomon, 2014/02/06 22:16:01]

It turns out we were already doing this in the stencil mask case.

This reminds me that the path is not always in device space due to save layer
offsets. I'll prepare another CL with a test and fix.

[robertphillips, 2014/02/07 13:42:11]

That's a better answer then them analyzing our stencil buffer usage.

+            scissorSpaceIBounds.offset(-clipDataIn->fOrigin);
+            fGpu->enableScissor(scissorSpaceIBounds);
             this->setGpuStencil();
             return true;
         }