use pixmaps for dst in sprites -- NO BITMAPS

src/core/SkSpriteBlitter.h

 /*
  * Copyright 2006 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 SkSpriteBlitter_DEFINED
 #define SkSpriteBlitter_DEFINED
 
-#include "SkBitmap.h"
-#include "SkBitmapProcShader.h"
 #include "SkBlitter.h"
+#include "SkPixmap.h"
 #include "SkShader.h"
 #include "SkSmallAllocator.h"
 
 class SkPaint;
 
 class SkSpriteBlitter : public SkBlitter {
 public:
     SkSpriteBlitter(const SkPixmap& source);
 
-    virtual void setup(const SkBitmap& device, int left, int top, const SkPaint&);
+    virtual void setup(const SkPixmap& dst, int left, int top, const SkPaint&);
 
 #ifdef SK_DEBUG
     void blitH(int x, int y, int width) override;
     void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override;
     void blitV(int x, int y, int height, SkAlpha alpha) override;
     void blitMask(const SkMask&, const SkIRect& clip) override;
 #endif
 
     static SkSpriteBlitter* ChooseD16(const SkPixmap& source, const SkPaint&, SkTBlitterAllocator*);
     static SkSpriteBlitter* ChooseD32(const SkPixmap& source, const SkPaint&, SkTBlitterAllocator*);
 
 protected:
-    const SkBitmap* fDevice;
+    SkPixmap        fDst;
     const SkPixmap  fSource;
     int             fLeft, fTop;
     const SkPaint*  fPaint;
 };
 
 #endif