Implement a generic matrix transform image filter.

gm/imagefiltersclipped.cpp

 /*
  * Copyright 2014 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 "SkColor.h"
 #include "SkBitmapSource.h"
 #include "SkBlurImageFilter.h"
 #include "SkDisplacementMapEffect.h"
 #include "SkDropShadowImageFilter.h"
 #include "SkGradientShader.h"
 #include "SkMorphologyImageFilter.h"
 #include "SkOffsetImageFilter.h"
 #include "SkPerlinNoiseShader.h"
 #include "SkRectShaderImageFilter.h"
-#include "SkResizeImageFilter.h"
+#include "SkMatrixImageFilter.h"
 #include "SkScalar.h"
 
 #define RESIZE_FACTOR_X SkIntToScalar(2)
 #define RESIZE_FACTOR_Y SkIntToScalar(5)
 
 namespace skiagm {
 
 class ImageFiltersClippedGM : public GM {
 public:
     ImageFiltersClippedGM() : fInitialized(false) {
@@ skipping 54 matching lines @@
             this->make_checkerboard();
             this->make_gradient_circle(64, 64);
             fInitialized = true;
         }
         canvas->clear(0x00000000);
 
         SkAutoTUnref<SkImageFilter> gradient(SkBitmapSource::Create(fGradientCircle));
         SkAutoTUnref<SkImageFilter> checkerboard(SkBitmapSource::Create(fCheckerboard));
         SkAutoTUnref<SkShader> noise(SkPerlinNoiseShader::CreateFractalNoise(
             SkDoubleToScalar(0.1), SkDoubleToScalar(0.05), 1, 0));
+        SkMatrix resizeMatrix;
+        resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
 
         SkImageFilter* filters[] = {
             SkBlurImageFilter::Create(SkIntToScalar(12), SkIntToScalar(12)),
             SkDropShadowImageFilter::Create(SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3),
                                             SK_ColorGREEN),
             SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelSelectorType,
                                             SkDisplacementMapEffect::kR_ChannelSelectorType,
                                             SkIntToScalar(12),
                                             gradient.get(),
                                             checkerboard.get()),
             SkDilateImageFilter::Create(2, 2, checkerboard.get()),
             SkErodeImageFilter::Create(2, 2, checkerboard.get()),
             SkOffsetImageFilter::Create(SkIntToScalar(-16), SkIntToScalar(32)),
-            SkResizeImageFilter::Create(RESIZE_FACTOR_X, RESIZE_FACTOR_Y, SkPaint::kNone_FilterLevel),
+            SkMatrixImageFilter::Create(resizeMatrix, SkPaint::kNone_FilterLevel),
             SkRectShaderImageFilter::Create(noise),
         };
 
         SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
         SkScalar margin = SkIntToScalar(16);
         SkRect bounds = r;
         bounds.outset(margin, margin);
 
         for (int xOffset = 0; xOffset < 80; xOffset += 16) {
             canvas->save();
@@ skipping 31 matching lines @@
     SkBitmap fGradientCircle;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new ImageFiltersClippedGM; }
 static GMRegistry reg(MyFactory);
 
 }