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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 #include "gm.h" | 7 #include "gm.h" |
8 #include "SkGradientShader.h" | 8 #include "SkGradientShader.h" |
9 | 9 |
10 using namespace skiagm; | 10 using namespace skiagm; |
11 | 11 |
12 struct GradData { | 12 struct GradData { |
13 int fCount; | 13 int fCount; |
14 const SkColor* fColors; | 14 const SkColor* fColors; |
15 const SkScalar* fPos; | 15 const SkScalar* fPos; |
16 }; | 16 }; |
17 | 17 |
18 static const SkColor gColors[] = { | 18 static const SkColor gColors[] = { |
19 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, | 19 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, |
20 }; | 20 }; |
21 | 21 |
22 static const GradData gGradData[] = { | 22 static const GradData gGradData[] = { |
23 { 1, gColors, NULL }, | 23 { 1, gColors, NULL }, |
24 { 2, gColors, NULL }, | 24 { 2, gColors, NULL }, |
25 { 3, gColors, NULL }, | 25 { 3, gColors, NULL }, |
26 { 4, gColors, NULL }, | 26 { 4, gColors, NULL }, |
27 }; | 27 }; |
28 | 28 |
29 static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data, | 29 static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data, SkShader
::TileMode tm) { |
30 SkShader::TileMode tm, SkUnitMapper* mapper) { | 30 return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos, data.fCo
unt, tm); |
31 return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos, | |
32 data.fCount, tm, mapper); | |
33 } | 31 } |
34 | 32 |
35 static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data, | 33 static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data, SkShader
::TileMode tm) { |
36 SkShader::TileMode tm, SkUnitMapper* mapper) { | |
37 SkPoint center; | 34 SkPoint center; |
38 center.set(SkScalarAve(pts[0].fX, pts[1].fX), | 35 center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
39 SkScalarAve(pts[0].fY, pts[1].fY)); | 36 SkScalarAve(pts[0].fY, pts[1].fY)); |
40 return SkGradientShader::CreateRadial(center, center.fX, data.fColors, | 37 return SkGradientShader::CreateRadial(center, center.fX, data.fColors, |
41 data.fPos, data.fCount, tm, mapper); | 38 data.fPos, data.fCount, tm); |
42 } | 39 } |
43 | 40 |
44 static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data, | 41 static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data, SkShader:
:TileMode) { |
45 SkShader::TileMode, SkUnitMapper* mapper) { | |
46 SkPoint center; | 42 SkPoint center; |
47 center.set(SkScalarAve(pts[0].fX, pts[1].fX), | 43 center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
48 SkScalarAve(pts[0].fY, pts[1].fY)); | 44 SkScalarAve(pts[0].fY, pts[1].fY)); |
49 return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors, | 45 return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors, dat
a.fPos, data.fCount); |
50 data.fPos, data.fCount, mapper); | |
51 } | 46 } |
52 | 47 |
53 static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data, | 48 static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data, SkShade
r::TileMode tm) { |
54 SkShader::TileMode tm, SkUnitMapper* mapper) { | |
55 SkPoint center0, center1; | 49 SkPoint center0, center1; |
56 center0.set(SkScalarAve(pts[0].fX, pts[1].fX), | 50 center0.set(SkScalarAve(pts[0].fX, pts[1].fX), |
57 SkScalarAve(pts[0].fY, pts[1].fY)); | 51 SkScalarAve(pts[0].fY, pts[1].fY)); |
58 center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5), | 52 center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5), |
59 SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4)); | 53 SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4)); |
60 return SkGradientShader::CreateTwoPointRadial( | 54 return SkGradientShader::CreateTwoPointRadial( |
61 center1, (pts[1].fX - pts[0].fX) / 7, | 55 center1, (pts[1].fX - pts[0].fX) / 7, |
62 center0, (pts[1].fX - pts[0].fX) / 2, | 56 center0, (pts[1].fX - pts[0].fX) / 2, |
63 data.fColors, data.fPos, data.fCount, tm, mapper); | 57 data.fColors, data.fPos, data.fCount, tm); |
64 } | 58 } |
65 | 59 |
66 static SkShader* Make2Conical(const SkPoint pts[2], const GradData& data, | 60 static SkShader* Make2Conical(const SkPoint pts[2], const GradData& data, SkShad
er::TileMode tm) { |
67 SkShader::TileMode tm, SkUnitMapper* mapper) { | |
68 SkPoint center0, center1; | 61 SkPoint center0, center1; |
69 SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10); | 62 SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10); |
70 SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3); | 63 SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3); |
71 center0.set(pts[0].fX + radius0, pts[0].fY + radius0); | 64 center0.set(pts[0].fX + radius0, pts[0].fY + radius0); |
72 center1.set(pts[1].fX - radius1, pts[1].fY - radius1); | 65 center1.set(pts[1].fX - radius1, pts[1].fY - radius1); |
73 return SkGradientShader::CreateTwoPointConical(center1, radius1, | 66 return SkGradientShader::CreateTwoPointConical(center1, radius1, |
74 center0, radius0, | 67 center0, radius0, |
75 data.fColors, data.fPos, | 68 data.fColors, data.fPos, |
76 data.fCount, tm, mapper); | 69 data.fCount, tm); |
77 } | 70 } |
78 | 71 |
79 | 72 |
80 typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, | 73 typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, SkSha
der::TileMode tm); |
81 SkShader::TileMode tm, SkUnitMapper* mapper); | 74 |
82 static const GradMaker gGradMakers[] = { | 75 static const GradMaker gGradMakers[] = { |
83 MakeLinear, MakeRadial, MakeSweep, Make2Radial, Make2Conical, | 76 MakeLinear, MakeRadial, MakeSweep, Make2Radial, Make2Conical, |
84 }; | 77 }; |
85 | 78 |
86 /////////////////////////////////////////////////////////////////////////////// | 79 /////////////////////////////////////////////////////////////////////////////// |
87 | 80 |
88 class GradientsNoTextureGM : public GM { | 81 class GradientsNoTextureGM : public GM { |
89 public: | 82 public: |
90 GradientsNoTextureGM() { | 83 GradientsNoTextureGM() { |
91 this->setBGColor(0xFFDDDDDD); | 84 this->setBGColor(0xFFDDDDDD); |
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106 SkRect kRect = { 0, 0, SkIntToScalar(50), SkIntToScalar(50) }; | 99 SkRect kRect = { 0, 0, SkIntToScalar(50), SkIntToScalar(50) }; |
107 SkPaint paint; | 100 SkPaint paint; |
108 paint.setAntiAlias(true); | 101 paint.setAntiAlias(true); |
109 | 102 |
110 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); | 103 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); |
111 static const uint8_t kAlphas[] = { 0xff, 0x40 }; | 104 static const uint8_t kAlphas[] = { 0xff, 0x40 }; |
112 for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphas); ++a) { | 105 for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphas); ++a) { |
113 for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); ++i) { | 106 for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); ++i) { |
114 canvas->save(); | 107 canvas->save(); |
115 for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); ++j) { | 108 for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); ++j) { |
116 SkShader* shader = gGradMakers[j](kPts, gGradData[i], kTM, N
ULL); | 109 SkShader* shader = gGradMakers[j](kPts, gGradData[i], kTM); |
117 paint.setShader(shader)->unref(); | 110 paint.setShader(shader)->unref(); |
118 paint.setAlpha(kAlphas[a]); | 111 paint.setAlpha(kAlphas[a]); |
119 canvas->drawRect(kRect, paint); | 112 canvas->drawRect(kRect, paint); |
120 canvas->translate(0, SkIntToScalar(kRect.height() + 20)); | 113 canvas->translate(0, SkIntToScalar(kRect.height() + 20)); |
121 } | 114 } |
122 canvas->restore(); | 115 canvas->restore(); |
123 canvas->translate(SkIntToScalar(kRect.width() + 20), 0); | 116 canvas->translate(SkIntToScalar(kRect.width() + 20), 0); |
124 } | 117 } |
125 } | 118 } |
126 } | 119 } |
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256 } | 249 } |
257 | 250 |
258 private: | 251 private: |
259 typedef GM INHERITED; | 252 typedef GM INHERITED; |
260 }; | 253 }; |
261 | 254 |
262 /////////////////////////////////////////////////////////////////////////////// | 255 /////////////////////////////////////////////////////////////////////////////// |
263 | 256 |
264 DEF_GM( return SkNEW(GradientsNoTextureGM)); | 257 DEF_GM( return SkNEW(GradientsNoTextureGM)); |
265 DEF_GM( return SkNEW(GradientsManyColorsGM)); | 258 DEF_GM( return SkNEW(GradientsManyColorsGM)); |
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