circularclips.cpp 2.7 KB

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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. #include "gm/gm.h"
  8. #include "include/core/SkCanvas.h"
  9. #include "include/core/SkClipOp.h"
  10. #include "include/core/SkPaint.h"
  11. #include "include/core/SkPath.h"
  12. #include "include/core/SkRect.h"
  13. #include "include/core/SkScalar.h"
  14. #include "include/core/SkSize.h"
  15. #include "include/core/SkString.h"
  16. #include "include/core/SkTypes.h"
  17. #include "src/core/SkClipOpPriv.h"
  18. class CircularClipsGM : public skiagm::GM {
  19. SkScalar fX1, fX2, fY, fR;
  20. SkPath fCircle1, fCircle2;
  21. protected:
  22. void onOnceBeforeDraw() override {
  23. fX1 = 80;
  24. fX2 = 120;
  25. fY = 50;
  26. fR = 40;
  27. fCircle1.addCircle(fX1, fY, fR, SkPath::kCW_Direction);
  28. fCircle2.addCircle(fX2, fY, fR, SkPath::kCW_Direction);
  29. }
  30. bool runAsBench() const override { return true; }
  31. SkString onShortName() override {
  32. return SkString("circular-clips");
  33. }
  34. SkISize onISize() override {
  35. return SkISize::Make(800, 600);
  36. }
  37. void onDraw(SkCanvas* canvas) override {
  38. const SkClipOp ops[] = {
  39. kDifference_SkClipOp,
  40. kIntersect_SkClipOp,
  41. kUnion_SkClipOp,
  42. kXOR_SkClipOp,
  43. kReverseDifference_SkClipOp,
  44. kReplace_SkClipOp,
  45. };
  46. SkRect rect = SkRect::MakeLTRB(fX1 - fR, fY - fR, fX2 + fR, fY + fR);
  47. SkPaint fillPaint;
  48. // Giant background circular clips (AA, non-inverted, replace/isect)
  49. fillPaint.setColor(0x80808080);
  50. canvas->save();
  51. canvas->scale(10, 10);
  52. canvas->translate(-((fX1 + fX2)/2 - fR), -(fY - 2*fR/3));
  53. canvas->clipPath(fCircle1, true);
  54. canvas->clipPath(fCircle2, true);
  55. canvas->drawRect(rect, fillPaint);
  56. canvas->restore();
  57. fillPaint.setColor(0xFF000000);
  58. for (size_t i = 0; i < 4; i++) {
  59. fCircle1.toggleInverseFillType();
  60. if (i % 2 == 0) {
  61. fCircle2.toggleInverseFillType();
  62. }
  63. canvas->save();
  64. for (size_t op = 0; op < SK_ARRAY_COUNT(ops); op++) {
  65. canvas->save();
  66. canvas->clipPath(fCircle1);
  67. canvas->clipPath(fCircle2, ops[op]);
  68. canvas->drawRect(rect, fillPaint);
  69. canvas->restore();
  70. canvas->translate(0, 2 * fY);
  71. }
  72. canvas->restore();
  73. canvas->translate(fX1 + fX2, 0);
  74. }
  75. }
  76. private:
  77. typedef skiagm::GM INHERITED;
  78. };
  79. //////////////////////////////////////////////////////////////////////////////
  80. DEF_GM( return new CircularClipsGM; )