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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 #include "gl/builders/GrGLProgramBuilder.h" | 8 #include "gl/builders/GrGLProgramBuilder.h" |
9 #include "GrBicubicEffect.h" | 9 #include "GrBicubicEffect.h" |
10 | 10 |
11 | 11 |
12 #define DS(x) SkDoubleToScalar(x) | 12 #define DS(x) SkDoubleToScalar(x) |
13 | 13 |
14 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = { | 14 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = { |
15 DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0), | 15 DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0), |
16 DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0), | 16 DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0), |
17 DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0), | 17 DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0), |
18 DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS( 7.0 / 18.0), | 18 DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS( 7.0 / 18.0), |
19 }; | 19 }; |
20 | 20 |
21 | 21 |
22 class GrGLBicubicEffect : public GrGLFragmentProcessor { | 22 class GrGLBicubicEffect : public GrGLFragmentProcessor { |
23 public: | 23 public: |
24 GrGLBicubicEffect(const GrBackendProcessorFactory& factory, | 24 GrGLBicubicEffect(const GrBackendProcessorFactory& factory, |
25 const GrProcessor&); | 25 const GrProcessor&); |
26 | 26 |
27 virtual void emitCode(GrGLProgramBuilder*, | 27 virtual void emitCode(GrGLFPBuilder*, |
28 const GrFragmentProcessor&, | 28 const GrFragmentProcessor&, |
29 const GrProcessorKey&, | 29 const GrProcessorKey&, |
30 const char* outputColor, | 30 const char* outputColor, |
31 const char* inputColor, | 31 const char* inputColor, |
32 const TransformedCoordsArray&, | 32 const TransformedCoordsArray&, |
33 const TextureSamplerArray&) SK_OVERRIDE; | 33 const TextureSamplerArray&) SK_OVERRIDE; |
34 | 34 |
35 virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_O
VERRIDE; | 35 virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) SK_O
VERRIDE; |
36 | 36 |
37 static inline void GenKey(const GrProcessor& effect, const GrGLCaps&, | 37 static inline void GenKey(const GrProcessor& effect, const GrGLCaps&, |
38 GrProcessorKeyBuilder* b) { | 38 GrProcessorKeyBuilder* b) { |
39 const GrTextureDomain& domain = effect.cast<GrBicubicEffect>().domain(); | 39 const GrTextureDomain& domain = effect.cast<GrBicubicEffect>().domain(); |
40 b->add32(GrTextureDomain::GLDomain::DomainKey(domain)); | 40 b->add32(GrTextureDomain::GLDomain::DomainKey(domain)); |
41 } | 41 } |
42 | 42 |
43 private: | 43 private: |
44 typedef GrGLProgramDataManager::UniformHandle UniformHandle; | 44 typedef GrGLProgramDataManager::UniformHandle UniformHandle; |
45 | 45 |
46 UniformHandle fCoefficientsUni; | 46 UniformHandle fCoefficientsUni; |
47 UniformHandle fImageIncrementUni; | 47 UniformHandle fImageIncrementUni; |
48 GrTextureDomain::GLDomain fDomain; | 48 GrTextureDomain::GLDomain fDomain; |
49 | 49 |
50 typedef GrGLFragmentProcessor INHERITED; | 50 typedef GrGLFragmentProcessor INHERITED; |
51 }; | 51 }; |
52 | 52 |
53 GrGLBicubicEffect::GrGLBicubicEffect(const GrBackendProcessorFactory& factory, c
onst GrProcessor&) | 53 GrGLBicubicEffect::GrGLBicubicEffect(const GrBackendProcessorFactory& factory, c
onst GrProcessor&) |
54 : INHERITED(factory) { | 54 : INHERITED(factory) { |
55 } | 55 } |
56 | 56 |
57 void GrGLBicubicEffect::emitCode(GrGLProgramBuilder* builder, | 57 void GrGLBicubicEffect::emitCode(GrGLFPBuilder* builder, |
58 const GrFragmentProcessor& effect, | 58 const GrFragmentProcessor& effect, |
59 const GrProcessorKey& key, | 59 const GrProcessorKey& key, |
60 const char* outputColor, | 60 const char* outputColor, |
61 const char* inputColor, | 61 const char* inputColor, |
62 const TransformedCoordsArray& coords, | 62 const TransformedCoordsArray& coords, |
63 const TextureSamplerArray& samplers) { | 63 const TextureSamplerArray& samplers) { |
64 const GrTextureDomain& domain = effect.cast<GrBicubicEffect>().domain(); | 64 const GrTextureDomain& domain = effect.cast<GrBicubicEffect>().domain(); |
65 | 65 |
66 fCoefficientsUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil
ity, | 66 fCoefficientsUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibil
ity, |
67 kMat44f_GrSLType, "Coefficients"); | 67 kMat44f_GrSLType, "Coefficients"); |
68 fImageIncrementUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib
ility, | 68 fImageIncrementUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visib
ility, |
69 kVec2f_GrSLType, "ImageIncrement"); | 69 kVec2f_GrSLType, "ImageIncrement"); |
70 | 70 |
71 const char* imgInc = builder->getUniformCStr(fImageIncrementUni); | 71 const char* imgInc = builder->getUniformCStr(fImageIncrementUni); |
72 const char* coeff = builder->getUniformCStr(fCoefficientsUni); | 72 const char* coeff = builder->getUniformCStr(fCoefficientsUni); |
73 | 73 |
74 SkString cubicBlendName; | 74 SkString cubicBlendName; |
75 | 75 |
76 static const GrGLShaderVar gCubicBlendArgs[] = { | 76 static const GrGLShaderVar gCubicBlendArgs[] = { |
77 GrGLShaderVar("coefficients", kMat44f_GrSLType), | 77 GrGLShaderVar("coefficients", kMat44f_GrSLType), |
78 GrGLShaderVar("t", kFloat_GrSLType), | 78 GrGLShaderVar("t", kFloat_GrSLType), |
79 GrGLShaderVar("c0", kVec4f_GrSLType), | 79 GrGLShaderVar("c0", kVec4f_GrSLType), |
80 GrGLShaderVar("c1", kVec4f_GrSLType), | 80 GrGLShaderVar("c1", kVec4f_GrSLType), |
81 GrGLShaderVar("c2", kVec4f_GrSLType), | 81 GrGLShaderVar("c2", kVec4f_GrSLType), |
82 GrGLShaderVar("c3", kVec4f_GrSLType), | 82 GrGLShaderVar("c3", kVec4f_GrSLType), |
83 }; | 83 }; |
84 GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); | 84 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
85 SkString coords2D = fsBuilder->ensureFSCoords2D(coords, 0); | 85 SkString coords2D = fsBuilder->ensureFSCoords2D(coords, 0); |
86 fsBuilder->emitFunction(kVec4f_GrSLType, | 86 fsBuilder->emitFunction(kVec4f_GrSLType, |
87 "cubicBlend", | 87 "cubicBlend", |
88 SK_ARRAY_COUNT(gCubicBlendArgs), | 88 SK_ARRAY_COUNT(gCubicBlendArgs), |
89 gCubicBlendArgs, | 89 gCubicBlendArgs, |
90 "\tvec4 ts = vec4(1.0, t, t * t, t * t * t);\n" | 90 "\tvec4 ts = vec4(1.0, t, t * t, t * t * t);\n" |
91 "\tvec4 c = coefficients * ts;\n" | 91 "\tvec4 c = coefficients * ts;\n" |
92 "\treturn c.x * c0 + c.y * c1 + c.z * c2 + c.w * c3;
\n", | 92 "\treturn c.x * c0 + c.y * c1 + c.z * c2 + c.w * c3;
\n", |
93 &cubicBlendName); | 93 &cubicBlendName); |
94 fsBuilder->codeAppendf("\tvec2 coord = %s - %s * vec2(0.5);\n", coords2D.c_s
tr(), imgInc); | 94 fsBuilder->codeAppendf("\tvec2 coord = %s - %s * vec2(0.5);\n", coords2D.c_s
tr(), imgInc); |
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216 // Use bilerp to handle rotation or fractional translation. | 216 // Use bilerp to handle rotation or fractional translation. |
217 *filterMode = GrTextureParams::kBilerp_FilterMode; | 217 *filterMode = GrTextureParams::kBilerp_FilterMode; |
218 } | 218 } |
219 return false; | 219 return false; |
220 } | 220 } |
221 // When we use the bicubic filtering effect each sample is read from the tex
ture using | 221 // When we use the bicubic filtering effect each sample is read from the tex
ture using |
222 // nearest neighbor sampling. | 222 // nearest neighbor sampling. |
223 *filterMode = GrTextureParams::kNone_FilterMode; | 223 *filterMode = GrTextureParams::kNone_FilterMode; |
224 return true; | 224 return true; |
225 } | 225 } |
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