Image filters: change applyCropRect() to take a src rect.

src/effects/SkXfermodeImageFilter.cpp

 /*
  * Copyright 2013 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.
  */
 
 #include "SkXfermodeImageFilter.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
@@ skipping 39 matching lines @@
     SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
     if (!this->filterInput(0, proxy, src, ctx, &background, &backgroundOffset)) {
         background.reset();
     }
     SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
     if (!this->filterInput(1, proxy, src, ctx, &foreground, &foregroundOffset)) {
         foreground.reset();
     }
 
     SkIRect bounds, foregroundBounds;
-    if (!applyCropRect(ctx, foreground, foregroundOffset, &foregroundBounds)) {
+    SkIRect foregroundSrcBounds = foreground.bounds();
+    foregroundSrcBounds.offset(foregroundOffset);
+    if (!applyCropRect(ctx, foregroundSrcBounds, &foregroundBounds)) {
         foregroundBounds.setEmpty();
         foreground.reset();
     }
-    if (!applyCropRect(ctx, background, backgroundOffset, &bounds)) {
+    SkIRect backgroundSrcBounds = background.bounds();
+    backgroundSrcBounds.offset(backgroundOffset);
+    if (!applyCropRect(ctx, backgroundSrcBounds, &bounds)) {
         bounds.setEmpty();
         background.reset();
     }
     bounds.join(foregroundBounds);
     if (bounds.isEmpty()) {
         return false;
     }
 
     SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
     if (nullptr == device.get()) {
@@ skipping 162 matching lines @@
     drawContext->drawRect(GrClip::WideOpen(), paint, matrix, SkRect::Make(bounds));
 
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     GrWrapTextureInBitmap(dst, bounds.width(), bounds.height(), false, result);
     return true;
 }
 
 #endif