remove bitmaps entirely from sprite blits (as source)

src/core/SkBlitter.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 SkBlitter_DEFINED
 #define SkBlitter_DEFINED
 
@@ skipping 112 matching lines @@
         Return the correct blitter to use given the specified context.
      */
     static SkBlitter* Choose(const SkBitmap& device,
                              const SkMatrix& matrix,
                              const SkPaint& paint,
                              SkTBlitterAllocator*,
                              bool drawCoverage = false);
 
     static SkBlitter* ChooseSprite(const SkBitmap& device,
                                    const SkPaint&,
-                                   const SkBitmap& src,
+                                   const SkPixmap& src,
                                    int left, int top,
                                    SkTBlitterAllocator*);
     ///@}
 
 protected:
 
     SkAutoMalloc fBlitMemory;
     
 private:
 };
@@ skipping 91 matching lines @@
     SkBlitter*  apply(SkBlitter* blitter, const SkRegion* clip,
                       const SkIRect* bounds = NULL);
 
 private:
     SkNullBlitter       fNullBlitter;
     SkRectClipBlitter   fRectBlitter;
     SkRgnClipBlitter    fRgnBlitter;
 };
 
 #endif