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/*
* Copyright 2016 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 "SkAvoidXfermode.h"
// This GM exercises how the avoid xfer mode interacts with partial coverage
class AvoidXfermode3GM : public skiagm::GM {
public:
AvoidXfermode3GM() { }
protected:
SkString onShortName() override {
return SkString("avoidxfermode3");
}
SkISize onISize() override { return SkISize::Make(128, 128); }
void onDraw(SkCanvas* canvas) override {
canvas->drawARGB(255, 0, 0, 0);
SkRect r = SkRect::MakeXYWH(16.5f, 16.5f, 96.0f, 96.0f);
SkPaint p0;
p0.setColor(SK_ColorWHITE);
p0.setAntiAlias(true);
canvas->drawRect(r, p0);
r = SkRect::MakeXYWH(3.5f, 3.5f, 59.0f, 59.0f);
// UL corner: replace white with green with a tight tolerance
SkPaint p1;
p1.setColor(SK_ColorGREEN);
p1.setAntiAlias(true);
p1.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE,
5,
SkAvoidXfermode::kTargetColor_Mode))->unref();
canvas->drawRect(r, p1);
r.offsetTo(65.5f, 3.5f);
// UR corner: draw red everywhere except white with a tight tolerance
SkPaint p2;
p2.setColor(SK_ColorRED);
p2.setAntiAlias(true);
p2.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE,
250,
SkAvoidXfermode::kAvoidColor_Mode))->unref();
canvas->drawRect(r, p2);
r.offsetTo(3.5f, 65.5f);
// LL corner: replace white with blue with a loose tolerance
SkPaint p3;
p3.setColor(SK_ColorBLUE);
p3.setAntiAlias(true);
p3.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE,
250,
SkAvoidXfermode::kTargetColor_Mode))->unref();
canvas->drawRect(r, p3);
r.offsetTo(65.5f, 65.5f);
// LR corner: draw yellow everywhere except white with a loose tolerance
SkPaint p4;
p4.setColor(SK_ColorYELLOW);
p4.setAntiAlias(true);
p4.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE,
5,
SkAvoidXfermode::kAvoidColor_Mode))->unref();
canvas->drawRect(r, p4);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new AvoidXfermode3GM;)
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