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: CircularClipsGM()16 CircularClipsGM() {} 17 18 protected: onGetFlags() const19 virtual uint32_t onGetFlags() const SK_OVERRIDE { 20 return kSkipTiled_Flag; 21 } 22 onShortName()23 virtual SkString onShortName() { 24 return SkString("circular-clips"); 25 } 26 onISize()27 virtual SkISize onISize() { 28 return SkISize::Make(800, 600); 29 } 30 onDraw(SkCanvas * canvas)31 virtual void onDraw(SkCanvas* canvas) { 32 SkRegion::Op ops[] = { 33 SkRegion::kDifference_Op, 34 SkRegion::kIntersect_Op, 35 SkRegion::kUnion_Op, 36 SkRegion::kXOR_Op, 37 SkRegion::kReverseDifference_Op, 38 SkRegion::kReplace_Op, 39 }; 40 41 SkScalar x1 = 80, x2 = 120; 42 SkScalar y = 50; 43 SkScalar r = 40; 44 45 SkPath circle1, circle2; 46 circle1.addCircle(x1, y, r, SkPath::kCW_Direction); 47 circle2.addCircle(x2, y, r, SkPath::kCW_Direction); 48 SkRect rect = SkRect::MakeLTRB(x1 - r, y - r, x2 + r, y + r); 49 50 SkPaint fillPaint; 51 52 for (size_t i = 0; i < 4; i++) { 53 circle1.toggleInverseFillType(); 54 if (i % 2 == 0) { 55 circle2.toggleInverseFillType(); 56 } 57 58 canvas->save(); 59 for (size_t op = 0; op < SK_ARRAY_COUNT(ops); op++) { 60 canvas->save(); 61 62 canvas->clipPath(circle1, SkRegion::kReplace_Op); 63 canvas->clipPath(circle2, ops[op]); 64 65 canvas->drawRect(rect, fillPaint); 66 67 canvas->restore(); 68 canvas->translate(0, 2 * y); 69 } 70 canvas->restore(); 71 canvas->translate(x1 + x2, 0); 72 } 73 } 74 75 private: 76 typedef GM INHERITED; 77 }; 78 79 ////////////////////////////////////////////////////////////////////////////// 80 81 DEF_GM( return new CircularClipsGM; ) 82 } 83