allow canvas to force conservative clips (for speed)

include/gpu/SkGpuDevice.h

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 134 matching lines @@
     // remove when our clients don't rely on accessBitmap()
     SkBitmap fLegacyBitmap;
 
     SkGpuDevice(GrSurface*, unsigned flags = 0);
 
     virtual SkBaseDevice* onCreateDevice(const SkImageInfo&, Usage) SK_OVERRIDE;
 
     virtual SkSurface* newSurface(const SkImageInfo&) SK_OVERRIDE;
 
     virtual SkImageFilter::Cache* getImageFilterCache() SK_OVERRIDE;
+    virtual bool forceConservativeRasterClip() const SK_OVERRIDE { return true; }
 
     // sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
     // SkDraw's matrix and draw in device coords.
     void prepareDraw(const SkDraw&, bool forceIdentity);
 
     /**
      * Implementation for both drawBitmap and drawBitmapRect.
      */
     void drawBitmapCommon(const SkDraw&,
                           const SkBitmap& bitmap,
@@ skipping 31 matching lines @@
                          bool bicubic);
 
     bool drawDashLine(const SkPoint pts[2], const SkPaint& paint);
 
     static SkPicture::AccelData::Key ComputeAccelDataKey();
 
     typedef SkBaseDevice INHERITED;
 };
 
 #endif