Put SimpleOffsetFilter on heap.

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"
 #include "SkDevice.h"
 #include "SkBitmapSource.h"
 #include "SkBlurImageFilter.h"
 #include "SkColorFilter.h"
 #include "SkColorFilterImageFilter.h"
 #include "SkColorMatrixFilter.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkMergeImageFilter.h"
 #include "SkMorphologyImageFilter.h"
 #include "SkOnce.h"
 #include "SkTestImageFilters.h"
 #include "SkXfermodeImageFilter.h"
 
 // More closely models how Blink's OffsetFilter works as of 10/23/13. SkOffsetImageFilter doesn't
 // perform a draw and this one does.
 class SimpleOffsetFilter : public SkImageFilter {
 public:
-    SimpleOffsetFilter(SkScalar dx, SkScalar dy, SkImageFilter* input)
-    : SkImageFilter(input), fDX(dx), fDY(dy) {}
+    static SkImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input) {
+        return SkNEW_ARGS(SimpleOffsetFilter, (dx, dy, input));
+    }
 
     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;
         }
 
@@ skipping 22 matching lines @@
         fDY = buffer.readScalar();
     }
 
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         this->SkImageFilter::flatten(buffer);
         buffer.writeScalar(fDX);
         buffer.writeScalar(fDY);
     }
 
 private:
+    SimpleOffsetFilter(SkScalar dx, SkScalar dy, SkImageFilter* input)
+    : SkImageFilter(input), fDX(dx), fDY(dy) {}
+
     SkScalar fDX, fDY;
 };
 
 static void init_flattenable(int*) {
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SimpleOffsetFilter)
 }
 
 class ImageFiltersGraphGM : public skiagm::GM {
 public:
     ImageFiltersGraphGM() : fInitialized(false) {
@@ skipping 67 matching lines @@
             drawClippedBitmap(canvas, fBitmap, paint);
             canvas->translate(SkIntToScalar(100), 0);
         }
         {
             SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
                                     0, SK_Scalar1, 0, 0, 0,
                                     0, 0, SK_Scalar1, 0, 0,
                                     0, 0, 0, 0.5f, 0 };
             SkAutoTUnref<SkColorMatrixFilter> matrixCF(SkColorMatrixFilter::Create(matrix));
             SkAutoTUnref<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Create(matrixCF));
-            SimpleOffsetFilter offsetFilter(SkIntToScalar(10), SkIntToScalar(10), matrixFilter);
+            SkAutoTUnref<SkImageFilter> offsetFilter(
+                SimpleOffsetFilter::Create(10.0f, 10.f, matrixFilter));
 
             SkAutoTUnref<SkXfermode> arith(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0));
             SkAutoTUnref<SkXfermodeImageFilter> arithFilter(
-                SkXfermodeImageFilter::Create(arith, matrixFilter, &offsetFilter));
+                SkXfermodeImageFilter::Create(arith, matrixFilter, offsetFilter));
 
             SkPaint paint;
             paint.setImageFilter(arithFilter);
             drawClippedBitmap(canvas, fBitmap, paint);
             canvas->translate(SkIntToScalar(100), 0);
         }
         {
             SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(
               SkIntToScalar(10), SkIntToScalar(10)));
 
@@ skipping 31 matching lines @@
 private:
     typedef GM INHERITED;
     SkBitmap fBitmap;
     bool fInitialized;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static skiagm::GM* MyFactory(void*) { return new ImageFiltersGraphGM; }
 static skiagm::GMRegistry reg(MyFactory);