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/*
* Copyright 2015 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 "SkImageFilter.h"
#include "SkColorMatrixFilter.h"
/**
* Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see
* that we apply the xfermode *after* the image has been created and filtered, and not during
* the creation step (i.e. before it is filtered).
*
* see skbug.com/3741
*/
class ImageFilterXfermodeTestGM : public skiagm::GM {
protected:
SkString onShortName() override {
return SkString("imagefilters_xfermodes");
}
SkISize onISize() override { return SkISize::Make(480, 480); }
void doDraw(SkCanvas* canvas, SkXfermode::Mode mode, SkImageFilter* imf) {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(220, 220));
// want to force a layer, so modes like DstIn can combine meaningfully, but the final
// image can still be shown against our default (opaque) background. non-opaque GMs
// are a lot more trouble to compare/triage.
canvas->saveLayer(nullptr, nullptr);
canvas->drawColor(SK_ColorGREEN);
SkPaint paint;
paint.setAntiAlias(true);
SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100);
SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200);
paint.setColor(SK_ColorRED);
canvas->drawOval(r0, paint);
paint.setColor(0x660000FF);
paint.setImageFilter(imf);
paint.setXfermodeMode(mode);
canvas->drawOval(r1, paint);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(10, 10);
// just need an imagefilter to trigger the code-path (which creates a tmp layer)
SkAutoTUnref<SkImageFilter> imf(SkImageFilter::CreateMatrixFilter(SkMatrix::I(),
kNone_SkFilterQuality));
const SkXfermode::Mode modes[] = {
SkXfermode::kSrcATop_Mode, SkXfermode::kDstIn_Mode
};
for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) {
canvas->save();
this->doDraw(canvas, modes[i], nullptr);
canvas->translate(240, 0);
this->doDraw(canvas, modes[i], imf);
canvas->restore();
canvas->translate(0, 240);
}
}
private:
typedef GM INHERITED;
};
DEF_GM( return new ImageFilterXfermodeTestGM; )
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