remove SkCanvas::createCompatibleDevice, and add SkCanvas::newSurface

include/core/SkDevice.h

 
 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkDevice_DEFINED
@@ skipping 349 matching lines @@
      *  it just returns false and leaves result and offset unchanged.
      */
     virtual bool filterImage(SkImageFilter*, const SkBitmap&, const SkMatrix&,
                              SkBitmap* result, SkIPoint* offset) = 0;
 
     // This is equal kBGRA_Premul_Config8888 or kRGBA_Premul_Config8888 if
     // either is identical to kNative_Premul_Config8888. Otherwise, -1.
     static const SkCanvas::Config8888 kPMColorAlias;
 
 protected:
+    // default impl returns NULL
+    virtual SkSurface* newSurface(const SkImageInfo&);
+
     /**
      *  Leaky properties are those which the device should be applying but it isn't.
      *  These properties will be applied by the draw, when and as it can.
      *  If the device does handle a property, that property should be set to the identity value
      *  for that property, effectively making it non-leaky.
      */
     SkDeviceProperties fLeakyProperties;
 
 private:
     friend class SkCanvas;
     friend struct DeviceCM; //for setMatrixClip
     friend class SkDraw;
     friend class SkDrawIter;
     friend class SkDeviceFilteredPaint;
     friend class SkDeviceImageFilterProxy;
+    friend class DeferredDevice;    // for newSurface
 
     friend class SkSurface_Raster;
 
     // used to change the backend's pixels (and possibly config/rowbytes)
     // but cannot change the width/height, so there should be no change to
     // any clip information.
     // TODO: move to SkBitmapDevice
     virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) = 0;
 
     // just called by SkCanvas when built as a layer
@@ skipping 19 matching lines @@
     SkMetaData* fMetaData;
 
 #ifdef SK_DEBUG
     bool        fAttachedToCanvas;
 #endif
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif