Factory methods for heap-allocated SkImageFilter objects.

src/effects/SkPictureImageFilter.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 "SkPictureImageFilter.h"
 #include "SkDevice.h"
 #include "SkCanvas.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkValidationUtils.h"
 
 SkPictureImageFilter::SkPictureImageFilter(SkPicture* picture)
   : INHERITED(0, 0),
     fPicture(picture),
-    fRect(SkRect::MakeWH(picture ? SkIntToScalar(picture->width()) : 0,
-                         picture ? SkIntToScalar(picture->height()) : 0)) {
+    fCropRect(SkRect::MakeWH(picture ? SkIntToScalar(picture->width()) : 0,
+                             picture ? SkIntToScalar(picture->height()) : 0)) {
     SkSafeRef(fPicture);
 }
 
-SkPictureImageFilter::SkPictureImageFilter(SkPicture* picture, const SkRect& rect)
+SkPictureImageFilter::SkPictureImageFilter(SkPicture* picture, const SkRect& cropRect)
   : INHERITED(0, 0),
     fPicture(picture),
-    fRect(rect) {
+    fCropRect(cropRect) {
     SkSafeRef(fPicture);
 }
 
 SkPictureImageFilter::~SkPictureImageFilter() {
     SkSafeUnref(fPicture);
 }
 
 SkPictureImageFilter::SkPictureImageFilter(SkReadBuffer& buffer)
   : INHERITED(0, buffer),
     fPicture(NULL) {
 #ifdef SK_ALLOW_PICTUREIMAGEFILTER_SERIALIZATION
     if (buffer.readBool()) {
         fPicture = SkPicture::CreateFromBuffer(buffer);
     }
 #else
     buffer.readBool();
 #endif
-    buffer.readRect(&fRect);
+    buffer.readRect(&fCropRect);
 }
 
 void SkPictureImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
 #ifdef SK_ALLOW_PICTUREIMAGEFILTER_SERIALIZATION
     bool hasPicture = (fPicture != NULL);
     buffer.writeBool(hasPicture);
     if (hasPicture) {
         fPicture->flatten(buffer);
     }
 #else
     buffer.writeBool(false);
 #endif
-    buffer.writeRect(fRect);
+    buffer.writeRect(fCropRect);
 }
 
 bool SkPictureImageFilter::onFilterImage(Proxy* proxy, const SkBitmap&, const SkMatrix& matrix,
                                    SkBitmap* result, SkIPoint* offset) const {
     if (!fPicture) {
         offset->fX = offset->fY = 0;
         return true;
     }
 
     SkRect floatBounds;
     SkIRect bounds;
-    matrix.mapRect(&floatBounds, fRect);
+    matrix.mapRect(&floatBounds, fCropRect);
     floatBounds.roundOut(&bounds);
 
     if (bounds.isEmpty()) {
         offset->fX = offset->fY = 0;
         return true;
     }
 
     SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
     if (NULL == device.get()) {
         return false;
     }
 
     SkCanvas canvas(device.get());
     SkPaint paint;
 
     canvas.translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
     canvas.concat(matrix);
     canvas.drawPicture(*fPicture);
 
     *result = device.get()->accessBitmap(false);
     offset->fX = bounds.fLeft;
     offset->fY = bounds.fTop;
     return true;
 }