support direct writing to top layer

gm/rrects.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 "gm.h"
 #if SK_SUPPORT_GPU
 #include "GrTest.h"
@@ skipping 48 matching lines @@
     virtual uint32_t onGetFlags() const SK_OVERRIDE {
         if (kEffect_Type == fType) {
             return kGPUOnly_Flag;
         } else {
             return 0;
         }
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
 #if SK_SUPPORT_GPU
-        SkBaseDevice* device = canvas->getTopDevice();
-        GrContext* context = NULL;
-        GrRenderTarget* rt = device->accessRenderTarget();
-        if (NULL != rt) {
-            context = rt->getContext();
-        }
+        GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
+        GrContext* context = rt ? rt->getContext() : NULL;
         if (kEffect_Type == fType && NULL == context) {
             return;
         }
 #endif
 
         SkPaint paint;
         if (kAA_Draw_Type == fType) {
             paint.setAntiAlias(true);
         }
 
@@ skipping 165 matching lines @@
 
 DEF_GM( return new RRectGM(RRectGM::kAA_Draw_Type); )
 DEF_GM( return new RRectGM(RRectGM::kBW_Draw_Type); )
 DEF_GM( return new RRectGM(RRectGM::kAA_Clip_Type); )
 DEF_GM( return new RRectGM(RRectGM::kBW_Clip_Type); )
 #if SK_SUPPORT_GPU
 DEF_GM( return new RRectGM(RRectGM::kEffect_Type); )
 #endif
 
 }