Implement support for expanding crop rects in image filters

src/effects/SkLightingImageFilter.cpp

 /*
  * Copyright 2012 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 "SkLightingImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 928 matching lines @@
     SkImageFilter* input = getInput(0);
     SkBitmap src = source;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
     if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
         return false;
     }
 
     if (src.colorType() != kPMColor_SkColorType) {
         return false;
     }
-    SkAutoLockPixels alp(src);
-    if (!src.getPixels()) {
-        return false;
-    }
-
     SkIRect bounds;
-    src.getBounds(&bounds);
-    bounds.offset(srcOffset);
-    if (!this->applyCropRect(&bounds, ctx.ctm())) {
+    if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &bounds, &src)) {
         return false;
     }
 
     if (bounds.width() < 2 || bounds.height() < 2) {
         return false;
     }
 
+    SkAutoLockPixels alp(src);
+    if (!src.getPixels()) {
+        return false;
+    }
+
     dst->setConfig(src.config(), bounds.width(), bounds.height());
     if (!dst->allocPixels()) {
         return false;
     }
 
     SkAutoTUnref<SkLight> transformedLight(light()->transform(ctx.ctm()));
 
     DiffuseLightingType lightingType(fKD);
     offset->fX = bounds.left();
     offset->fY = bounds.top();
@@ skipping 57 matching lines @@
     SkImageFilter* input = getInput(0);
     SkBitmap src = source;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
     if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
         return false;
     }
 
     if (src.colorType() != kPMColor_SkColorType) {
         return false;
     }
-    SkAutoLockPixels alp(src);
-    if (!src.getPixels()) {
-        return false;
-    }
 
     SkIRect bounds;
-    src.getBounds(&bounds);
-    bounds.offset(srcOffset);
-    if (!this->applyCropRect(&bounds, ctx.ctm())) {
+    if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &bounds, &src)) {
         return false;
     }
 
     if (bounds.width() < 2 || bounds.height() < 2) {
         return false;
     }
 
+    SkAutoLockPixels alp(src);
+    if (!src.getPixels()) {
+        return false;
+    }
+
     dst->setConfig(src.config(), bounds.width(), bounds.height());
     dst->allocPixels();
     if (!dst->getPixels()) {
         return false;
     }
 
     SpecularLightingType lightingType(fKS, fShininess);
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     bounds.offset(-srcOffset);
@@ skipping 550 matching lines @@
 
     builder->fsCodeAppendf("%s(%s)", fLightColorFunc.c_str(), surfaceToLight);
 }
 
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiffuseLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpecularLightingImageFilter)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END