Make filters use SkImage instead of SkBitmap

include/core/SkCanvas.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 SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 757 matching lines @@
 
     /** Draw the specified image, with its top/left corner at (x,y), using the
         specified paint, transformed by the current matrix.
 
         @param image    The image to be drawn
         @param left     The position of the left side of the image being drawn
         @param top      The position of the top side of the image being drawn
         @param paint    The paint used to draw the image, or NULL
      */
     void drawImage(const SkImage* image, SkScalar left, SkScalar top, const SkPaint* paint = NULL);
+
     /** Draw the specified image, with the specified matrix applied (before the
         canvas' matrix is applied).
 
         @param image   The image to be drawn
         @param src      Optional: specify the subset of the image to be drawn
         @param dst      The destination rectangle where the scaled/translated
                         image will be drawn
         @param paint    The paint used to draw the image, or NULL
     */
     void drawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst,
@@ skipping 706 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif