Fix CTM application in SkResizeImagefilter; implement bounds traversals.

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 "SkResizeImageFilter.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) {
         this->setBGColor(0x00000000);
     }
 
 protected:
     virtual SkString onShortName() {
@@ skipping 60 matching lines @@
             new SkDropShadowImageFilter(SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3),
                                         SK_ColorGREEN),
             new SkDisplacementMapEffect(SkDisplacementMapEffect::kR_ChannelSelectorType,
                                         SkDisplacementMapEffect::kR_ChannelSelectorType,
                                         SkIntToScalar(12),
                                         gradient.get(),
                                         checkerboard.get()),
             new SkDilateImageFilter(2, 2, checkerboard.get()),
             new SkErodeImageFilter(2, 2, checkerboard.get()),
             new SkOffsetImageFilter(SkIntToScalar(-16), SkIntToScalar(32)),
+            new SkResizeImageFilter(RESIZE_FACTOR_X, RESIZE_FACTOR_Y, SkPaint::kNone_FilterLevel),
         };
 
         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();
             bounds.fLeft = SkIntToScalar(xOffset);
             for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
                 SkPaint paint;
                 paint.setColor(SK_ColorWHITE);
                 paint.setImageFilter(filters[i]);
                 paint.setAntiAlias(true);
                 canvas->save();
                 canvas->clipRect(bounds);
-                if (i == 5) {
+                if (5 == i) {
                     canvas->translate(SkIntToScalar(16), SkIntToScalar(-32));
+                } else if (6 == i) {
+                    canvas->scale(SkScalarInvert(RESIZE_FACTOR_X),
+                                  SkScalarInvert(RESIZE_FACTOR_Y));
                 }
                 canvas->drawCircle(r.centerX(), r.centerY(),
                                    SkScalarDiv(r.width()*2, SkIntToScalar(5)), paint);
                 canvas->restore();
                 canvas->translate(r.width() + margin, 0);
             }
             canvas->restore();
             canvas->translate(0, r.height() + margin);
         }
 
         for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
             SkSafeUnref(filters[i]);
         }
     }
 
 private:
     bool fInitialized;
     SkBitmap fCheckerboard;
     SkBitmap fGradientCircle;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new ImageFiltersClippedGM; }
 static GMRegistry reg(MyFactory);
 
 }