Add SkImage->draw() call with src and dst rects.

src/image/SkImage_Picture.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImage_Base.h"
 #include "SkImagePriv.h"
 #include "SkPicture.h"
 
 class SkImage_Picture : public SkImage_Base {
 public:
     SkImage_Picture(SkPicture*);
     virtual ~SkImage_Picture();
 
     virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE;
+    virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) SK_OVERRIDE;
 
     SkPicture* getPicture() { return fPicture; }
 
 private:
     SkPicture*  fPicture;
 
     typedef SkImage_Base INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkImage_Picture::SkImage_Picture(SkPicture* pict) : INHERITED(pict->width(), pict->height()) {
     pict->endRecording();
     pict->ref();
     fPicture = pict;
 }
 
 SkImage_Picture::~SkImage_Picture() {
     fPicture->unref();
 }
 
 void SkImage_Picture::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
                              const SkPaint* paint) {
     SkImagePrivDrawPicture(canvas, fPicture, x, y, paint);
 }
 
+void SkImage_Picture::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
+                             const SkPaint* paint) {
+    SkImagePrivDrawPicture(canvas, fPicture, src, dst, paint);
+}
+
 SkImage* SkNewImageFromPicture(const SkPicture* srcPicture) {
     /**
      *  We want to snapshot the playback status of the picture, w/o affecting
      *  its ability to continue recording (if needed).
      *
      *  Optimally this will shared as much data/buffers as it can with
      *  srcPicture, and srcPicture will perform a copy-on-write as needed if it
      *  needs to mutate them later on.
      */
     SkAutoTUnref<SkPicture> playback(SkNEW_ARGS(SkPicture, (*srcPicture)));
 
     return SkNEW_ARGS(SkImage_Picture, (playback));
 }
 
 SkPicture* SkPictureImageGetPicture(SkImage* pictureImage) {
     return static_cast<SkImage_Picture*>(pictureImage)->getPicture();
 }