Only use analytic effect-based clipping when AA is required by at least one element.

src/gpu/GrClipMaskManager.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrClipMaskManager.h"
 #include "GrAAConvexPathRenderer.h"
@@ skipping 250 matching lines @@
     //   diff  RR
     //   isect convex_poly
     //   isect convex_poly
     // when drawing rounded div borders. This could probably be tuned based on a
     // configuration's relative costs of switching RTs to generate a mask vs
     // longer shaders.
     if (elements.count() <= 4) {
         SkVector clipToRTOffset = { SkIntToScalar(-clipDataIn->fOrigin.fX),
                                     SkIntToScalar(-clipDataIn->fOrigin.fY) };
         if (elements.isEmpty() ||
-            this->installClipEffects(elements, are, clipToRTOffset, devBounds)) {
+            (requiresAA && this->installClipEffects(elements, are, clipToRTOffset, devBounds))) {
             SkIRect scissorSpaceIBounds(clipSpaceIBounds);
             scissorSpaceIBounds.offset(-clipDataIn->fOrigin);
             if (NULL == devBounds ||
                 !SkRect::Make(scissorSpaceIBounds).contains(*devBounds)) {
                 fGpu->enableScissor(scissorSpaceIBounds);
             } else {
                 fGpu->disableScissor();
             }
             this->setGpuStencil();
             return true;
@@ skipping 862 matching lines @@
 
     // TODO: dynamically attach a stencil buffer
     int stencilBits = 0;
     GrStencilBuffer* stencilBuffer =
         drawState.getRenderTarget()->getStencilBuffer();
     if (NULL != stencilBuffer) {
         stencilBits = stencilBuffer->bits();
         this->adjustStencilParams(settings, clipMode, stencilBits);
     }
 }