79 lines
2.5 KiB
C++
79 lines
2.5 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 "gm.h"
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#include "SkImageFilter.h"
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#include "SkColorMatrixFilter.h"
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/**
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* Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see
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* that we apply the xfermode *after* the image has been created and filtered, and not during
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* the creation step (i.e. before it is filtered).
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*
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* see skbug.com/3741
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*/
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class ImageFilterXfermodeTestGM : public skiagm::GM {
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protected:
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SkString onShortName() override {
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return SkString("imagefilters_xfermodes");
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}
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SkISize onISize() override { return SkISize::Make(480, 480); }
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void doDraw(SkCanvas* canvas, SkXfermode::Mode mode, SkImageFilter* imf) {
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SkAutoCanvasRestore acr(canvas, true);
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canvas->clipRect(SkRect::MakeWH(220, 220));
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// want to force a layer, so modes like DstIn can combine meaningfully, but the final
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// image can still be shown against our default (opaque) background. non-opaque GMs
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// are a lot more trouble to compare/triage.
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canvas->saveLayer(NULL, NULL);
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canvas->drawColor(SK_ColorGREEN);
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SkPaint paint;
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paint.setAntiAlias(true);
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SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100);
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SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200);
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paint.setColor(SK_ColorRED);
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canvas->drawOval(r0, paint);
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paint.setColor(0x660000FF);
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paint.setImageFilter(imf);
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paint.setXfermodeMode(mode);
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canvas->drawOval(r1, paint);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(10, 10);
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// just need an imagefilter to trigger the code-path (which creates a tmp layer)
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SkAutoTUnref<SkImageFilter> imf(SkImageFilter::CreateMatrixFilter(SkMatrix::I(),
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kNone_SkFilterQuality));
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const SkXfermode::Mode modes[] = {
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SkXfermode::kSrcATop_Mode, SkXfermode::kDstIn_Mode
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) {
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canvas->save();
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this->doDraw(canvas, modes[i], NULL);
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canvas->translate(240, 0);
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this->doDraw(canvas, modes[i], imf);
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canvas->restore();
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canvas->translate(0, 240);
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}
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}
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private:
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typedef GM INHERITED;
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};
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DEF_GM( return new ImageFilterXfermodeTestGM; )
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