1/*
2 * Copyright 2013 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "gm.h"
9#include "SkCanvas.h"
10#include "SkPath.h"
11
12class CircularClipsGM : public skiagm::GM {
13    SkScalar fX1, fX2, fY, fR;
14    SkPath   fCircle1, fCircle2;
15
16public:
17    CircularClipsGM() {
18        fX1 = 80;
19        fX2 = 120;
20        fY = 50;
21        fR = 40;
22
23        fCircle1.addCircle(fX1, fY, fR, SkPath::kCW_Direction);
24        fCircle2.addCircle(fX2, fY, fR, SkPath::kCW_Direction);
25    }
26
27protected:
28    virtual uint32_t onGetFlags() const SK_OVERRIDE {
29        return kSkipTiled_Flag | kAsBench_Flag;
30    }
31
32    virtual SkString onShortName() {
33        return SkString("circular-clips");
34    }
35
36    virtual SkISize onISize() {
37        return SkISize::Make(800, 600);
38    }
39
40    virtual void onDraw(SkCanvas* canvas) {
41        SkRegion::Op ops[] = {
42            SkRegion::kDifference_Op,
43            SkRegion::kIntersect_Op,
44            SkRegion::kUnion_Op,
45            SkRegion::kXOR_Op,
46            SkRegion::kReverseDifference_Op,
47            SkRegion::kReplace_Op,
48        };
49
50        SkRect rect = SkRect::MakeLTRB(fX1 - fR, fY - fR, fX2 + fR, fY + fR);
51
52        SkPaint fillPaint;
53
54        for (size_t i = 0; i < 4; i++) {
55            fCircle1.toggleInverseFillType();
56            if (i % 2 == 0) {
57                fCircle2.toggleInverseFillType();
58            }
59
60            canvas->save();
61            for (size_t op = 0; op < SK_ARRAY_COUNT(ops); op++) {
62                canvas->save();
63
64                canvas->clipPath(fCircle1, SkRegion::kReplace_Op);
65                canvas->clipPath(fCircle2, ops[op]);
66
67                canvas->drawRect(rect, fillPaint);
68
69                canvas->restore();
70                canvas->translate(0, 2 * fY);
71            }
72            canvas->restore();
73            canvas->translate(fX1 + fX2, 0);
74        }
75    }
76
77private:
78    typedef skiagm::GM INHERITED;
79};
80
81//////////////////////////////////////////////////////////////////////////////
82
83DEF_GM( return new CircularClipsGM; )
84