Implement support for expanding crop rects in image filters

gm/imagefiltersgraph.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 "gm.h"
 
 #include "SkArithmeticMode.h"
@@ skipping 21 matching lines @@
     virtual bool onFilterImage(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                SkBitmap* dst, SkIPoint* offset) const SK_OVERRIDE {
         SkBitmap source = src;
         SkImageFilter* input = getInput(0);
         SkIPoint srcOffset = SkIPoint::Make(0, 0);
         if (NULL != input && !input->filterImage(proxy, src, ctx, &source, &srcOffset)) {
             return false;
         }
 
         SkIRect bounds;
-        source.getBounds(&bounds);
-
-        if (!this->applyCropRect(&bounds, ctx.ctm())) {
+        if (!this->applyCropRect(ctx, proxy, source, &srcOffset, &bounds, &source)) {
             return false;
         }
 
         SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
         SkCanvas canvas(device);
         SkPaint paint;
         paint.setXfermodeMode(SkXfermode::kSrc_Mode);
         canvas.drawBitmap(source, fDX - bounds.left(), fDY - bounds.top(), &paint);
         *dst = device->accessBitmap(false);
         offset->fX += bounds.left();
@@ skipping 153 matching lines @@
 private:
     typedef GM INHERITED;
     SkBitmap fBitmap;
     bool fInitialized;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static skiagm::GM* MyFactory(void*) { return new ImageFiltersGraphGM; }
 static skiagm::GMRegistry reg(MyFactory);