gm/pathcontourstart.cpp - Issue 1456973002: Revert of Parametric contour start GM

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Issue 1456973002: Revert of Parametric contour start GM (Closed) Base URL: https://chromium.googlesource.com/skia.git@master

Patch Set: Created 5 years, 1 month ago

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1 /*

2 * Copyright 2015 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

10 #include "SkDashPathEffect.h"

11 #include "SkPaint.h"

12 #include "SkPath.h"

13 #include "SkRRect.h"

14

15 namespace skiagm {

16

17 class ContourStartGM : public GM {

18 public:

19 ContourStartGM() {

20 const SkScalar kMaxDashLen = 100;

21 const SkScalar kDashGrowth = 1.2f;

22

23 SkSTArray<100, SkScalar> intervals;

24 for (SkScalar len = 1; len < kMaxDashLen; len *= kDashGrowth) {

25 intervals.push_back(len);

26 intervals.push_back(len);

27 }

28

29 SkAutoTUnref<SkPathEffect> effect(

30 SkDashPathEffect::Create(intervals.begin(), intervals.count(), 0));

31

32 fDashPaint.setAntiAlias(true);

33 fDashPaint.setStyle(SkPaint::kStroke_Style);

34 fDashPaint.setStrokeWidth(6);

35 fDashPaint.setColor(0xff008000);

36 fDashPaint.setPathEffect(effect);

37

38 fPointsPaint.setColor(0xff800000);

39 fPointsPaint.setStrokeWidth(3);

40

41 fRect = SkRect::MakeLTRB(10, 10, 100, 70);

42 }

43

44 protected:

45 SkString onShortName() override {

46 return SkString("contour_start");

47 }

48

49 SkISize onISize() override { return SkISize::Make(kImageWidth, kImageHeight) ; }

50

51 void onDraw(SkCanvas* canvas) override {

52

53 drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {

54 SkPath path;

55 path.addRect(rect, dir, startIndex);

56 return path;

57 });

58

59 drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {

60 SkPath path;

61 path.addOval(rect, dir, startIndex);

62 return path;

63 });

64

65 drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {

66 SkRRect rrect;

67 const SkVector radii[4] = { {15, 15}, {15, 15}, {15, 15}, {15, 15}};

68 rrect.setRectRadii(rect, radii);

69

70 SkPath path;

71 path.addRRect(rrect, dir, startIndex);

72 return path;

73 });

74

75 drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {

76 SkRRect rrect;

77 rrect.setRect(rect);

78

79 SkPath path;

80 path.addRRect(rrect, dir, startIndex);

81 return path;

82 });

83

84 drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {

85 SkRRect rrect;

86 rrect.setOval(rect);

87

88 SkPath path;

89 path.addRRect(rrect, dir, startIndex);

90 return path;

91 });

92

93 }

94

95 private:

96 static const int kImageWidth = 1200;

97 static const int kImageHeight = 600;

98

99 SkPaint fDashPaint, fPointsPaint;

100 SkRect fRect;

101

102 void drawDirs(SkCanvas* canvas,

103 SkPath (*makePath)(const SkRect&, SkPath::Direction, unsigned) ) const {

104 drawOneColumn(canvas, SkPath::kCW_Direction, makePath);

105 canvas->translate(kImageWidth / 10, 0);

106 drawOneColumn(canvas, SkPath::kCCW_Direction, makePath);

107 canvas->translate(kImageWidth / 10, 0);

108 }

109

110 void drawOneColumn(SkCanvas* canvas, SkPath::Direction dir,

111 SkPath (*makePath)(const SkRect&, SkPath::Direction, unsi gned)) const {

112 SkAutoCanvasRestore acr(canvas, true);

113

114 for (unsigned i = 0; i < 8; ++i) {

115 const SkPath path = makePath(fRect, dir, i);

116 canvas->drawPath(path, fDashPaint);

117

118 const int n = path.countPoints();

119 SkAutoTArray<SkPoint> points(n);

120 path.getPoints(points.get(), n);

121 canvas->drawPoints(SkCanvas::kPoints_PointMode, n, points.get(), fPo intsPaint);

122

123 canvas->translate(0, kImageHeight / 8);

124 }

125 }

126

127 typedef GM INHERITED;

128 };

129

130 DEF_GM( return new ContourStartGM(); )

131

132 } // namespace skiagm

133

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