157bcd0840
BUG=499499 Review URL: https://codereview.chromium.org/1210053003
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkBitmapSource.h"
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#include "SkColorFilter.h"
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#include "SkColorFilterImageFilter.h"
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#include "SkDisplacementMapEffect.h"
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#include "SkTileImageFilter.h"
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#include "SkXfermode.h"
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#include "gm.h"
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namespace skiagm {
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// This tests the image filter graph:
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//
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// BitmapSource1 -- all red 512x512
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// |
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// ColorFilterImageFilter -- with a 64x64 crop rect - makes the pixels green
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// |
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// TileImageFilter -- which tiles the 64x64 green pixels across 512x512
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// |
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// | BitmapSource1 -- all red 512x512
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// | displacement | color
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// | |
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// DisplacementMapEffect -- this is only necessary to preserve the clip in the computed bounds
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// TileImageFilter by itself bloats the bounds to include the src
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// It has the TileImageFilter as the offset input.
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//
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// What was going on was that the clipRect being applied to the draw (64, 64, 512, 512)
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// was eliminating the "displacement" chain due to the crop rect.
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// This reproduces crbug/499499
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class CroppedDisplacementGM : public GM {
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public:
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CroppedDisplacementGM() { }
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protected:
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SkString onShortName() override {
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return SkString("cropped-displacement");
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}
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SkISize onISize() override {
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return SkISize::Make(kWidth, kHeight);
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}
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void onOnceBeforeDraw() override {
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fRedBitmap.allocN32Pixels(kWidth, kHeight);
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SkCanvas canvas(fRedBitmap);
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canvas.clear(SK_ColorRED);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint p;
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const SkRect smRect = SkRect::MakeWH(SkIntToScalar(kSmallSize), SkIntToScalar(kSmallSize));
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SkImageFilter::CropRect cr(smRect);
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SkAutoTUnref<SkBitmapSource> bms(SkBitmapSource::Create(fRedBitmap));
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SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorGREEN,
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SkXfermode::kSrc_Mode));
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SkAutoTUnref<SkColorFilterImageFilter> cfif(SkColorFilterImageFilter::Create(cf, bms, &cr));
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SkAutoTUnref<SkTileImageFilter> tif(SkTileImageFilter::Create(
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SkRect::MakeWH(SkIntToScalar(kSmallSize), SkIntToScalar(kSmallSize)),
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SkRect::MakeWH(SkIntToScalar(kWidth), SkIntToScalar(kHeight)),
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cfif));
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static const SkScalar kScale = 20.0f;
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SkAutoTUnref<SkDisplacementMapEffect> dif(SkDisplacementMapEffect::Create(
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SkDisplacementMapEffect::kB_ChannelSelectorType,
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SkDisplacementMapEffect::kB_ChannelSelectorType,
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kScale,
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tif, bms));
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p.setImageFilter(dif);
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canvas->clipRect(SkRect::MakeLTRB(kSmallSize+kScale/2.0f,
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kSmallSize+kScale/2.0f,
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SkIntToScalar(kWidth), SkIntToScalar(kHeight)));
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canvas->saveLayer(NULL, &p);
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canvas->restore();
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}
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private:
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static const int kWidth = 512;
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static const int kHeight = 512;
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static const int kSmallSize = 64;
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SkBitmap fRedBitmap;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return SkNEW(CroppedDisplacementGM); )
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}
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