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| 1 |
| 2 /* |
| 3 * Copyright 2013 Google Inc. |
| 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. |
| 7 */ |
| 8 #include "gm.h" |
| 9 #include "SkGradientShader.h" |
| 10 |
| 11 using namespace skiagm; |
| 12 |
| 13 struct GradData { |
| 14 int fCount; |
| 15 const SkColor* fColors; |
| 16 const SkScalar* fPos; |
| 17 }; |
| 18 |
| 19 static const SkColor gColors[] = { |
| 20 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 21 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 22 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 23 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 24 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 25 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 26 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 27 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| 28 }; |
| 29 |
| 30 //static const SkScalar gPos[] = { SK_Scalar1*999/2000, SK_Scalar1*1001/2000 }; |
| 31 |
| 32 static const GradData gGradData[] = { |
| 33 { 40, gColors, NULL }, |
| 34 // { 2, gColors, gPos }, |
| 35 // { 2, gCol2, NULL }, |
| 36 }; |
| 37 |
| 38 static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data, |
| 39 SkShader::TileMode tm, SkUnitMapper* mapper) { |
| 40 return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos, |
| 41 data.fCount, tm, mapper); |
| 42 } |
| 43 |
| 44 static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data, |
| 45 SkShader::TileMode tm, SkUnitMapper* mapper) { |
| 46 SkPoint center; |
| 47 center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 48 SkScalarAve(pts[0].fY, pts[1].fY)); |
| 49 return SkGradientShader::CreateRadial(center, center.fX, data.fColors, |
| 50 data.fPos, data.fCount, tm, mapper); |
| 51 } |
| 52 |
| 53 static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data, |
| 54 SkShader::TileMode, SkUnitMapper* mapper) { |
| 55 SkPoint center; |
| 56 center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 57 SkScalarAve(pts[0].fY, pts[1].fY)); |
| 58 return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors, |
| 59 data.fPos, data.fCount, mapper); |
| 60 } |
| 61 |
| 62 |
| 63 typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, |
| 64 SkShader::TileMode tm, SkUnitMapper* mapper); |
| 65 static const GradMaker gGradMakers[] = { |
| 66 MakeLinear, MakeRadial, MakeSweep, |
| 67 }; |
| 68 |
| 69 /////////////////////////////////////////////////////////////////////////////// |
| 70 |
| 71 class GradientsGM : public GM { |
| 72 public: |
| 73 GradientsGM() { |
| 74 this->setBGColor(0xFFDDDDDD); |
| 75 } |
| 76 |
| 77 protected: |
| 78 SkString onShortName() SK_OVERRIDE { return SkString("gradient_dirty_laundry
"); } |
| 79 virtual SkISize onISize() SK_OVERRIDE { return make_isize(640, 615); } |
| 80 |
| 81 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 82 SkPoint pts[2] = { { 0, 0 }, |
| 83 { SkIntToScalar(100), SkIntToScalar(100) } |
| 84 }; |
| 85 SkShader::TileMode tm = SkShader::kClamp_TileMode; |
| 86 SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) }; |
| 87 SkPaint paint; |
| 88 paint.setAntiAlias(true); |
| 89 |
| 90 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); |
| 91 for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) { |
| 92 canvas->save(); |
| 93 for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) { |
| 94 SkShader* shader = gGradMakers[j](pts, gGradData[i], tm, NULL); |
| 95 paint.setShader(shader)->unref(); |
| 96 canvas->drawRect(r, paint); |
| 97 canvas->translate(0, SkIntToScalar(120)); |
| 98 } |
| 99 canvas->restore(); |
| 100 canvas->translate(SkIntToScalar(120), 0); |
| 101 } |
| 102 } |
| 103 |
| 104 private: |
| 105 typedef GM INHERITED; |
| 106 }; |
| 107 |
| 108 /////////////////////////////////////////////////////////////////////////////// |
| 109 |
| 110 static GM* MyFactory(void*) { return new GradientsGM; } |
| 111 static GMRegistry reg(MyFactory); |
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