79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
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/*
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* Copyright 2013 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 "SkCanvas.h"
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#include "SkPath.h"
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namespace skiagm {
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class CircularClipsGM : public GM {
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public:
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CircularClipsGM() {}
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protected:
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virtual SkString onShortName() {
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return SkString("circular-clips");
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}
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virtual SkISize onISize() {
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return SkISize::Make(800, 600);
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}
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virtual void onDraw(SkCanvas* canvas) {
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SkRegion::Op ops[] = {
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SkRegion::kDifference_Op,
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SkRegion::kIntersect_Op,
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SkRegion::kUnion_Op,
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SkRegion::kXOR_Op,
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SkRegion::kReverseDifference_Op,
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SkRegion::kReplace_Op,
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};
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SkScalar x1 = 80, x2 = 120;
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SkScalar y = 50;
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SkScalar r = 40;
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SkPath circle1, circle2;
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circle1.addCircle(x1, y, r, SkPath::kCW_Direction);
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circle2.addCircle(x2, y, r, SkPath::kCW_Direction);
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SkRect rect = SkRect::MakeLTRB(x1 - r, y - r, x2 + r, y + r);
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SkPaint fillPaint;
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for (size_t i = 0; i < 4; i++) {
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circle1.toggleInverseFillType();
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if (i % 2 == 0) {
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circle2.toggleInverseFillType();
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}
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canvas->save();
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for (size_t op = 0; op < SK_ARRAY_COUNT(ops); op++) {
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canvas->save();
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canvas->clipPath(circle1, SkRegion::kReplace_Op);
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canvas->clipPath(circle2, ops[op]);
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canvas->drawRect(rect, fillPaint);
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canvas->restore();
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canvas->translate(0, 2 * y);
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}
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canvas->restore();
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canvas->translate(x1 + x2, 0);
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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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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new CircularClipsGM; )
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}
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