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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 | 7 |
8 #ifndef SkPerlinNoiseShader_DEFINED | 8 #ifndef SkPerlinNoiseShader_DEFINED |
9 #define SkPerlinNoiseShader_DEFINED | 9 #define SkPerlinNoiseShader_DEFINED |
10 | 10 |
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65 * Create alias for CreateTurbulunce until all Skia users changed | 65 * Create alias for CreateTurbulunce until all Skia users changed |
66 * its code to use the new naming | 66 * its code to use the new naming |
67 */ | 67 */ |
68 static SkShader* CreateTubulence(SkScalar baseFrequencyX, SkScalar baseFrequ
encyY, | 68 static SkShader* CreateTubulence(SkScalar baseFrequencyX, SkScalar baseFrequ
encyY, |
69 int numOctaves, SkScalar seed, | 69 int numOctaves, SkScalar seed, |
70 const SkISize* tileSize = NULL) { | 70 const SkISize* tileSize = NULL) { |
71 return CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves, seed, ti
leSize); | 71 return CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves, seed, ti
leSize); |
72 } | 72 } |
73 | 73 |
74 | 74 |
75 virtual bool setContext(const SkBitmap& device, const SkPaint& paint, | 75 virtual SkShader::Context* createContext( |
76 const SkMatrix& matrix); | 76 const SkBitmap& device, const SkPaint& paint, |
77 virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE; | 77 const SkMatrix& matrix, void* storage) const SK_OVERRIDE; |
78 virtual void shadeSpan16(int x, int y, uint16_t[], int count) SK_OVERRIDE; | 78 virtual size_t contextSize() const SK_OVERRIDE; |
| 79 |
| 80 class PerlinNoiseShaderContext : public SkShader::Context { |
| 81 public: |
| 82 PerlinNoiseShaderContext(const SkPerlinNoiseShader& shader, const SkBitm
ap& device, |
| 83 const SkPaint& paint, const SkMatrix& matrix); |
| 84 virtual ~PerlinNoiseShaderContext() {} |
| 85 |
| 86 virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE
; |
| 87 virtual void shadeSpan16(int x, int y, uint16_t[], int count) SK_OVERRID
E; |
| 88 |
| 89 private: |
| 90 SkPMColor shade(const SkPoint& point, StitchData& stitchData) const; |
| 91 SkScalar calculateTurbulenceValueForPoint( |
| 92 int channel, const PaintingData& paintingData, |
| 93 StitchData& stitchData, const SkPoint& point) const; |
| 94 SkScalar noise2D(int channel, const PaintingData& paintingData, |
| 95 const StitchData& stitchData, const SkPoint& noiseVecto
r) const; |
| 96 |
| 97 SkMatrix fMatrix; |
| 98 |
| 99 typedef SkShader::Context INHERITED; |
| 100 }; |
79 | 101 |
80 virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const S
K_OVERRIDE; | 102 virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const S
K_OVERRIDE; |
81 | 103 |
82 SK_TO_STRING_OVERRIDE() | 104 SK_TO_STRING_OVERRIDE() |
83 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPerlinNoiseShader) | 105 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPerlinNoiseShader) |
84 | 106 |
85 protected: | 107 protected: |
86 SkPerlinNoiseShader(SkReadBuffer&); | 108 SkPerlinNoiseShader(SkReadBuffer&); |
87 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; | 109 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
88 | 110 |
89 private: | 111 private: |
90 SkPerlinNoiseShader(SkPerlinNoiseShader::Type type, SkScalar baseFrequencyX, | 112 SkPerlinNoiseShader(SkPerlinNoiseShader::Type type, SkScalar baseFrequencyX, |
91 SkScalar baseFrequencyY, int numOctaves, SkScalar seed, | 113 SkScalar baseFrequencyY, int numOctaves, SkScalar seed, |
92 const SkISize* tileSize); | 114 const SkISize* tileSize); |
93 virtual ~SkPerlinNoiseShader(); | 115 virtual ~SkPerlinNoiseShader(); |
94 | 116 |
95 SkScalar noise2D(int channel, const PaintingData& paintingData, | |
96 const StitchData& stitchData, const SkPoint& noiseVector) c
onst; | |
97 | |
98 SkScalar calculateTurbulenceValueForPoint(int channel, const PaintingData& p
aintingData, | |
99 StitchData& stitchData, const SkPo
int& point) const; | |
100 | |
101 SkPMColor shade(const SkPoint& point, StitchData& stitchData) const; | |
102 | |
103 // TODO (scroggo): Once all SkShaders are created from a factory, and we hav
e removed the | 117 // TODO (scroggo): Once all SkShaders are created from a factory, and we hav
e removed the |
104 // constructor that creates SkPerlinNoiseShader from an SkReadBuffer, severa
l fields can | 118 // constructor that creates SkPerlinNoiseShader from an SkReadBuffer, severa
l fields can |
105 // be made constant. | 119 // be made constant. |
106 /*const*/ SkPerlinNoiseShader::Type fType; | 120 /*const*/ SkPerlinNoiseShader::Type fType; |
107 /*const*/ SkScalar fBaseFrequencyX; | 121 /*const*/ SkScalar fBaseFrequencyX; |
108 /*const*/ SkScalar fBaseFrequencyY; | 122 /*const*/ SkScalar fBaseFrequencyY; |
109 /*const*/ int fNumOctaves; | 123 /*const*/ int fNumOctaves; |
110 /*const*/ SkScalar fSeed; | 124 /*const*/ SkScalar fSeed; |
111 /*const*/ SkISize fTileSize; | 125 /*const*/ SkISize fTileSize; |
112 /*const*/ bool fStitchTiles; | 126 /*const*/ bool fStitchTiles; |
113 // TODO (scroggo): Once setContext creates a new object, place this on that
object. | |
114 SkMatrix fMatrix; | |
115 | 127 |
116 PaintingData* fPaintingData; | 128 PaintingData* fPaintingData; |
117 | 129 |
118 typedef SkShader INHERITED; | 130 typedef SkShader INHERITED; |
119 }; | 131 }; |
120 | 132 |
121 #endif | 133 #endif |
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