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| 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 |
| 12 namespace skiagm { |
| 13 |
| 14 class CircularClipsGM : public GM { |
| 15 public: |
| 16 CircularClipsGM() {} |
| 17 |
| 18 protected: |
| 19 virtual SkString onShortName() { |
| 20 return SkString("circular-clips"); |
| 21 } |
| 22 |
| 23 virtual SkISize onISize() { |
| 24 return SkISize::Make(800, 600); |
| 25 } |
| 26 |
| 27 virtual void onDraw(SkCanvas* canvas) { |
| 28 SkRegion::Op ops[] = { |
| 29 SkRegion::kDifference_Op, |
| 30 SkRegion::kIntersect_Op, |
| 31 SkRegion::kUnion_Op, |
| 32 SkRegion::kXOR_Op, |
| 33 SkRegion::kReverseDifference_Op, |
| 34 SkRegion::kReplace_Op, |
| 35 }; |
| 36 |
| 37 SkScalar x1 = 80, x2 = 120; |
| 38 SkScalar y = 50; |
| 39 SkScalar r = 40; |
| 40 |
| 41 SkPath circle1, circle2; |
| 42 circle1.addCircle(x1, y, r, SkPath::kCW_Direction); |
| 43 circle2.addCircle(x2, y, r, SkPath::kCW_Direction); |
| 44 SkRect rect = SkRect::MakeLTRB(x1 - r, y - r, x2 + r, y + r); |
| 45 |
| 46 SkPaint fillPaint; |
| 47 |
| 48 for (size_t i = 0; i < 4; i++) { |
| 49 circle1.toggleInverseFillType(); |
| 50 if (i % 2 == 0) { |
| 51 circle2.toggleInverseFillType(); |
| 52 } |
| 53 |
| 54 canvas->save(); |
| 55 for (size_t op = 0; op < SK_ARRAY_COUNT(ops); op++) { |
| 56 canvas->save(); |
| 57 |
| 58 canvas->clipPath(circle1, SkRegion::kReplace_Op); |
| 59 canvas->clipPath(circle2, ops[op]); |
| 60 |
| 61 canvas->drawRect(rect, fillPaint); |
| 62 |
| 63 canvas->restore(); |
| 64 canvas->translate(0, 2 * y); |
| 65 } |
| 66 canvas->restore(); |
| 67 canvas->translate(x1 + x2, 0); |
| 68 } |
| 69 } |
| 70 |
| 71 private: |
| 72 typedef GM INHERITED; |
| 73 }; |
| 74 |
| 75 ////////////////////////////////////////////////////////////////////////////// |
| 76 |
| 77 DEF_GM( return new CircularClipsGM; ) |
| 78 } |
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