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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 GrBicubicTextureEffect_DEFINED | 8 #ifndef GrBicubicTextureEffect_DEFINED |
9 #define GrBicubicTextureEffect_DEFINED | 9 #define GrBicubicTextureEffect_DEFINED |
10 | 10 |
11 #include "GrSingleTextureEffect.h" | 11 #include "GrSingleTextureEffect.h" |
12 #include "GrTextureDomain.h" | 12 #include "GrTextureDomain.h" |
13 #include "gl/GrGLEffect.h" | 13 #include "gl/GrGLProcessor.h" |
14 #include "GrTBackendEffectFactory.h" | 14 #include "GrTBackendProcessorFactory.h" |
15 | 15 |
16 class GrGLBicubicEffect; | 16 class GrGLBicubicEffect; |
17 | 17 |
18 class GrBicubicEffect : public GrSingleTextureEffect { | 18 class GrBicubicEffect : public GrSingleTextureEffect { |
19 public: | 19 public: |
20 enum { | 20 enum { |
21 kFilterTexelPad = 2, // Given a src rect in texels to be filtered, this
number of | 21 kFilterTexelPad = 2, // Given a src rect in texels to be filtered, this
number of |
22 // surrounding texels are needed by the kernel in x
and y. | 22 // surrounding texels are needed by the kernel in x
and y. |
23 }; | 23 }; |
24 virtual ~GrBicubicEffect(); | 24 virtual ~GrBicubicEffect(); |
25 | 25 |
26 static const char* Name() { return "Bicubic"; } | 26 static const char* Name() { return "Bicubic"; } |
27 const float* coefficients() const { return fCoefficients; } | 27 const float* coefficients() const { return fCoefficients; } |
28 | 28 |
29 typedef GrGLBicubicEffect GLEffect; | 29 typedef GrGLBicubicEffect GLProcessor; |
30 | 30 |
31 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; | 31 virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERR
IDE; |
32 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; | 32 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; |
33 | 33 |
34 const GrTextureDomain& domain() const { return fDomain; } | 34 const GrTextureDomain& domain() const { return fDomain; } |
35 | 35 |
36 /** | 36 /** |
37 * Create a simple filter effect with custom bicubic coefficients and option
al domain. | 37 * Create a simple filter effect with custom bicubic coefficients and option
al domain. |
38 */ | 38 */ |
39 static GrEffect* Create(GrTexture* tex, const SkScalar coefficients[16], | 39 static GrFragmentProcessor* Create(GrTexture* tex, const SkScalar coefficien
ts[16], |
40 const SkRect* domain = NULL) { | 40 const SkRect* domain = NULL) { |
41 if (NULL == domain) { | 41 if (NULL == domain) { |
42 static const SkShader::TileMode kTileModes[] = { SkShader::kClamp_Ti
leMode, | 42 static const SkShader::TileMode kTileModes[] = { SkShader::kClamp_Ti
leMode, |
43 SkShader::kClamp_Ti
leMode }; | 43 SkShader::kClamp_Ti
leMode }; |
44 return Create(tex, coefficients, GrCoordTransform::MakeDivByTextureW
HMatrix(tex), | 44 return Create(tex, coefficients, GrCoordTransform::MakeDivByTextureW
HMatrix(tex), |
45 kTileModes); | 45 kTileModes); |
46 } else { | 46 } else { |
47 return SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, | 47 return SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, |
48 GrCoordTransform::MakeDivByTextu
reWHMatrix(tex), | 48 GrCoordTransform::MakeDivByTextu
reWHMatrix(tex), |
49 *domain)); | 49 *domain)); |
50 } | 50 } |
51 } | 51 } |
52 | 52 |
53 /** | 53 /** |
54 * Create a Mitchell filter effect with specified texture matrix and x/y til
e modes. | 54 * Create a Mitchell filter effect with specified texture matrix and x/y til
e modes. |
55 */ | 55 */ |
56 static GrEffect* Create(GrTexture* tex, const SkMatrix& matrix, | 56 static GrFragmentProcessor* Create(GrTexture* tex, const SkMatrix& matrix, |
57 SkShader::TileMode tileModes[2]) { | 57 SkShader::TileMode tileModes[2]) { |
58 return Create(tex, gMitchellCoefficients, matrix, tileModes); | 58 return Create(tex, gMitchellCoefficients, matrix, tileModes); |
59 } | 59 } |
60 | 60 |
61 /** | 61 /** |
62 * Create a filter effect with custom bicubic coefficients, the texture matr
ix, and the x/y | 62 * Create a filter effect with custom bicubic coefficients, the texture matr
ix, and the x/y |
63 * tilemodes. | 63 * tilemodes. |
64 */ | 64 */ |
65 static GrEffect* Create(GrTexture* tex, const SkScalar coefficients[16], | 65 static GrFragmentProcessor* Create(GrTexture* tex, const SkScalar coefficien
ts[16], |
66 const SkMatrix& matrix, const SkShader::TileMode til
eModes[2]) { | 66 const SkMatrix& matrix, |
| 67 const SkShader::TileMode tileModes[2]) { |
67 return SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, matrix, tileModes
)); | 68 return SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, matrix, tileModes
)); |
68 } | 69 } |
69 | 70 |
70 /** | 71 /** |
71 * Create a Mitchell filter effect with a texture matrix and a domain. | 72 * Create a Mitchell filter effect with a texture matrix and a domain. |
72 */ | 73 */ |
73 static GrEffect* Create(GrTexture* tex, const SkMatrix& matrix, const SkRect
& domain) { | 74 static GrFragmentProcessor* Create(GrTexture* tex, const SkMatrix& matrix, |
| 75 const SkRect& domain) { |
74 return SkNEW_ARGS(GrBicubicEffect, (tex, gMitchellCoefficients, matrix,
domain)); | 76 return SkNEW_ARGS(GrBicubicEffect, (tex, gMitchellCoefficients, matrix,
domain)); |
75 } | 77 } |
76 | 78 |
77 /** | 79 /** |
78 * Determines whether the bicubic effect should be used based on the transfo
rmation from the | 80 * Determines whether the bicubic effect should be used based on the transfo
rmation from the |
79 * local coords to the device. Returns true if the bicubic effect should be
used. filterMode | 81 * local coords to the device. Returns true if the bicubic effect should be
used. filterMode |
80 * is set to appropriate filtering mode to use regardless of the return resu
lt (e.g. when this | 82 * is set to appropriate filtering mode to use regardless of the return resu
lt (e.g. when this |
81 * returns false it may indicate that the best fallback is to use kMipMap, k
Bilerp, or | 83 * returns false it may indicate that the best fallback is to use kMipMap, k
Bilerp, or |
82 * kNearest). | 84 * kNearest). |
83 */ | 85 */ |
84 static bool ShouldUseBicubic(const SkMatrix& localCoordsToDevice, | 86 static bool ShouldUseBicubic(const SkMatrix& localCoordsToDevice, |
85 GrTextureParams::FilterMode* filterMode); | 87 GrTextureParams::FilterMode* filterMode); |
86 | 88 |
87 private: | 89 private: |
88 GrBicubicEffect(GrTexture*, const SkScalar coefficients[16], | 90 GrBicubicEffect(GrTexture*, const SkScalar coefficients[16], |
89 const SkMatrix &matrix, const SkShader::TileMode tileModes[2
]); | 91 const SkMatrix &matrix, const SkShader::TileMode tileModes[2
]); |
90 GrBicubicEffect(GrTexture*, const SkScalar coefficients[16], | 92 GrBicubicEffect(GrTexture*, const SkScalar coefficients[16], |
91 const SkMatrix &matrix, const SkRect& domain); | 93 const SkMatrix &matrix, const SkRect& domain); |
92 virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; | 94 virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE; |
93 | 95 |
94 float fCoefficients[16]; | 96 float fCoefficients[16]; |
95 GrTextureDomain fDomain; | 97 GrTextureDomain fDomain; |
96 | 98 |
97 GR_DECLARE_EFFECT_TEST; | 99 GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
98 | 100 |
99 static const SkScalar gMitchellCoefficients[16]; | 101 static const SkScalar gMitchellCoefficients[16]; |
100 | 102 |
101 typedef GrSingleTextureEffect INHERITED; | 103 typedef GrSingleTextureEffect INHERITED; |
102 }; | 104 }; |
103 | 105 |
104 #endif | 106 #endif |
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