Pre-crop filled rects to avoid scissor

src/gpu/GrClip.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrClip.h"
 
 #include "GrClipMaskManager.h"
@@ skipping 36 matching lines @@
     SkASSERT(!fDeviceBounds.isLargest());
     if (fScissorState.enabled()) {
         SkIRect tightScissor;
         if (!tightScissor.intersect(fScissorState.rect(),
                                     SkIRect::MakeWH(drawContext->width(), drawContext->height()))) {
             return false;
         }
         if (devBounds && !devBounds->intersects(SkRect::Make(tightScissor))) {
             return false;
         }
-        if (fHasStencilClip) {
-            out->makeScissoredStencil(tightScissor, &fDeviceBounds);
-        } else {
-            out->makeScissored(tightScissor);
+        if (!devBounds || !CanIgnoreScissor(fScissorState.rect(), *devBounds)) {
+            if (fHasStencilClip) {
+                out->makeScissoredStencil(tightScissor, &fDeviceBounds);
+            } else {
+                out->makeScissored(tightScissor);
+            }
+            return true;
         }
-        return true;
     }
 
     out->makeStencil(fHasStencilClip, fDeviceBounds);
     return true;
 }
 
 bool GrClipStackClip::quickContains(const SkRect& rect) const {
     if (!fStack) {
         return true;
     }
@@ skipping 15 matching lines @@
                                   isIntersectionOfRects);
     devBounds.roundOut(devResult);
 }
 
 bool GrClipStackClip::apply(GrContext* context,
                             const GrPipelineBuilder& pipelineBuilder, GrDrawContext* drawContext,
                             const SkRect* devBounds, GrAppliedClip* out) const {
     return GrClipMaskManager::SetupClipping(context, pipelineBuilder, drawContext,
                                             *this, devBounds, out);
 }