samplecode/SamplePathUtils.cpp - Issue 1091963002: Revert of Revert of remove unused (by clients) SkPathUtils

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Issue 1091963002: Revert of Revert of remove unused (by clients) SkPathUtils (Closed) Base URL: https://skia.googlesource.com/skia.git@master

Patch Set: Created 5 years, 8 months ago

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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 "SampleCode.h"

9

10 #include "SkCanvas.h"

11 #include "SkCornerPathEffect.h"

12 #include "SkDashPathEffect.h"

13 #include "SkPathUtils.h"

14 #include "SkRandom.h"

15 #include "SkView.h"

16

17 typedef void (BitsToPath)(SkPath, const char*, int, int, int);

18

19 static const BitsToPath gBitsToPath_fns[] = {

20 SkPathUtils::BitsToPath_Path,

21 SkPathUtils::BitsToPath_Region,

22 };

23

24 // hardcoded bitmap patterns

25 static const uint8_t gBits[][16] = {

26 { 0x18, 0x00, 0x3c, 0x00, 0x7e, 0x00, 0xdb, 0x00,

27 0xff, 0x00, 0x24, 0x00, 0x5a, 0x00, 0xa5, 0x00 },

28

29 { 0x20, 0x80, 0x91, 0x20, 0xbf, 0xa0, 0xee, 0xe0,

30 0xff, 0xe0, 0x7f, 0xc0, 0x20, 0x80, 0x40, 0x40 },

31

32 { 0x0f, 0x00, 0x7f, 0xe0, 0xff, 0xf0, 0xe6, 0x70,

33 0xff, 0xf0, 0x19, 0x80, 0x36, 0xc0, 0xc0, 0x30 }

34 };

35

36

37 class SamplePathUtils : public SampleView {

38 public:

39 static const int fNumBits = 3;

40 static const int fH = 8, fW = 12;

41 static const size_t fRowBytes = 2;

42 static const int fNumChars = fH * fRowBytes;

43

44 SkPaint fBmpPaint;

45 SkScalar fPhase;

46

47 SamplePathUtils() {

48 fBmpPaint.setAntiAlias(true); // Black paint for bitmap

49 fBmpPaint.setStyle(SkPaint::kFill_Style);

50

51 fPhase = 0.0f; // to animate the dashed path

52 }

53

54 protected:

55 // overrides from SkEventSink

56 virtual bool onQuery(SkEvent* evt) {

57 if (SampleCode::TitleQ(*evt)) {

58 SampleCode::TitleR(evt, "PathUtils");

59 return true;

60 }

61 return this->INHERITED::onQuery(evt);

62 }

63

64 /////////////////////////////////////////////////////////////

65

66 virtual void onDrawContent(SkCanvas* canvas) {

67 SkScalar intervals[8] = { .5f, .3f, .5f, .3f, .5f, .3f, .5f, .3f };

68 SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(intervals, 2, fPhase));

69 SkAutoTUnref<SkCornerPathEffect> corner(SkCornerPathEffect::Create(.25f) );

70 SkAutoTUnref<SkComposePathEffect> compose(SkComposePathEffect::Create(da sh, corner));

71

72 SkPaint outlinePaint;

73 outlinePaint.setAntiAlias(true); // dashed paint for bitmap

74 outlinePaint.setStyle(SkPaint::kStroke_Style);

75 outlinePaint.setPathEffect(compose);

76

77 canvas->scale(10.0f, 10.0f); // scales up

78

79 for (int i = 0; i < fNumBits; ++i) {

80 canvas->save();

81 for (size_t j = 0; j < SK_ARRAY_COUNT(gBitsToPath_fns); ++j) {

82 SkPath path;

83 gBitsToPath_fns[j](&path, (char*) &gBits[i], fW, fH, fRowBytes);

84

85 //draw skPath and outline

86 canvas->drawPath(path, fBmpPaint);

87 canvas->translate(1.5f * fW, 0); // translates past previous bit map

88 canvas->drawPath(path, outlinePaint);

89 canvas->translate(1.5f * fW, 0); // translates past previous bit map

90 }

91 canvas->restore();

92 canvas->translate(0, 1.5f * fH); //translate to next row

93 }

94

95 // for animated pathEffect

96 fPhase += .01f;

97 this->inval(NULL);

98 }

99

100 private:

101 typedef SkView INHERITED;

102 };

103

104 //////////////////////////////////////////////////////////////////////////////

105

106 static SkView* MyFactory() { return new SamplePathUtils; }

107 static SkViewRegister reg(MyFactory)

108 ;

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