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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 GrGLSLFragmentProcessor_DEFINED | 8 #ifndef GrGLSLFragmentProcessor_DEFINED |
9 #define GrGLSLFragmentProcessor_DEFINED | 9 #define GrGLSLFragmentProcessor_DEFINED |
10 | 10 |
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26 | 26 |
27 virtual ~GrGLSLFragmentProcessor() { | 27 virtual ~GrGLSLFragmentProcessor() { |
28 for (int i = 0; i < fChildProcessors.count(); ++i) { | 28 for (int i = 0; i < fChildProcessors.count(); ++i) { |
29 delete fChildProcessors[i]; | 29 delete fChildProcessors[i]; |
30 } | 30 } |
31 } | 31 } |
32 | 32 |
33 typedef GrGLSLProgramDataManager::UniformHandle UniformHandle; | 33 typedef GrGLSLProgramDataManager::UniformHandle UniformHandle; |
34 typedef GrGLSLProgramDataManager::UniformHandle SamplerHandle; | 34 typedef GrGLSLProgramDataManager::UniformHandle SamplerHandle; |
35 | 35 |
| 36 /** |
| 37 * When building a program from a GrPipeline this is used to provide the GrS
haderVars that |
| 38 * contain the resulting transformed coords from each of a GrFragmentProcess
or's |
| 39 * GrCoordTransforms. This allows the GrFragmentProcessor subclasses to refe
r to the transformed |
| 40 * coords in fragment code. |
| 41 */ |
| 42 class TransformedCoordVars { |
| 43 public: |
| 44 TransformedCoordVars(const GrFragmentProcessor* fp, const GrShaderVar* v
ars) |
| 45 : fFP(fp) |
| 46 , fTransformedVars(vars) {} |
| 47 |
| 48 const GrShaderVar& operator[] (int i) const { |
| 49 SkASSERT(i >= 0 && i < fFP->numCoordTransforms()); |
| 50 return fTransformedVars[i]; |
| 51 } |
| 52 |
| 53 TransformedCoordVars childTransforms(int childIdx) const; |
| 54 |
| 55 private: |
| 56 const GrFragmentProcessor* fFP; |
| 57 const GrShaderVar* fTransformedVars; |
| 58 }; |
| 59 |
36 /** Called when the program stage should insert its code into the shaders. T
he code in each | 60 /** Called when the program stage should insert its code into the shaders. T
he code in each |
37 shader will be in its own block ({}) and so locally scoped names will no
t collide across | 61 shader will be in its own block ({}) and so locally scoped names will no
t collide across |
38 stages. | 62 stages. |
39 | 63 |
40 @param fragBuilder Interface used to emit code in the shaders. | 64 @param fragBuilder Interface used to emit code in the shaders. |
41 @param fp The processor that generated this program stage
. | 65 @param fp The processor that generated this program stage
. |
42 @param key The key that was computed by GenKey() from the
generating | 66 @param key The key that was computed by GenKey() from the
generating |
43 GrProcessor. | 67 GrProcessor. |
44 @param outputColor A predefined vec4 in the FS in which the stage
should place its | 68 @param outputColor A predefined vec4 in the FS in which the stage
should place its |
45 output color (or coverage). | 69 output color (or coverage). |
46 @param inputColor A vec4 that holds the input color to the stage
in the FS. This may | 70 @param inputColor A vec4 that holds the input color to the stage
in the FS. This may |
47 be nullptr in which case the implied input is s
olid white (all | 71 be nullptr in which case the implied input is s
olid white (all |
48 ones). TODO: Better system for communicating op
timization info | 72 ones). TODO: Better system for communicating op
timization info |
49 (e.g. input color is solid white, trans black,
known to be opaque, | 73 (e.g. input color is solid white, trans black,
known to be opaque, |
50 etc.) that allows the processor to communicate
back similar known | 74 etc.) that allows the processor to communicate
back similar known |
51 info about its output. | 75 info about its output. |
52 @param transformedCoords Fragment shader variables containing the coords
computed using | 76 @param transformedCoords Fragment shader variables containing the coords
computed using |
53 each of the GrFragmentProcessor's Coord Transfo
rms. | 77 each of the GrFragmentProcessor's GrCoordTransf
orms. |
54 @param texSamplers Contains one entry for each GrTextureAccess of
the GrProcessor. | 78 @param texSamplers Contains one entry for each GrTextureAccess of
the GrProcessor. |
55 These can be passed to the builder to emit text
ure reads in the | 79 These can be passed to the builder to emit text
ure reads in the |
56 generated code. | 80 generated code. |
57 @param bufferSamplers Contains one entry for each GrBufferAccess of t
he GrProcessor. | 81 @param bufferSamplers Contains one entry for each GrBufferAccess of t
he GrProcessor. |
58 These can be passed to the builder to emit buff
er reads in the | 82 These can be passed to the builder to emit buff
er reads in the |
59 generated code. | 83 generated code. |
60 */ | 84 */ |
61 struct EmitArgs { | 85 struct EmitArgs { |
62 EmitArgs(GrGLSLFPFragmentBuilder* fragBuilder, | 86 EmitArgs(GrGLSLFPFragmentBuilder* fragBuilder, |
63 GrGLSLUniformHandler* uniformHandler, | 87 GrGLSLUniformHandler* uniformHandler, |
64 const GrGLSLCaps* caps, | 88 const GrGLSLCaps* caps, |
65 const GrFragmentProcessor& fp, | 89 const GrFragmentProcessor& fp, |
66 const char* outputColor, | 90 const char* outputColor, |
67 const char* inputColor, | 91 const char* inputColor, |
68 const SkTArray<GrShaderVar>& transformedCoords, | 92 const TransformedCoordVars& transformedCoordVars, |
69 const SamplerHandle* texSamplers, | 93 const SamplerHandle* texSamplers, |
70 const SamplerHandle* bufferSamplers, | 94 const SamplerHandle* bufferSamplers, |
71 bool gpImplementsDistanceVector) | 95 bool gpImplementsDistanceVector) |
72 : fFragBuilder(fragBuilder) | 96 : fFragBuilder(fragBuilder) |
73 , fUniformHandler(uniformHandler) | 97 , fUniformHandler(uniformHandler) |
74 , fGLSLCaps(caps) | 98 , fGLSLCaps(caps) |
75 , fFp(fp) | 99 , fFp(fp) |
76 , fOutputColor(outputColor) | 100 , fOutputColor(outputColor) |
77 , fInputColor(inputColor) | 101 , fInputColor(inputColor) |
78 , fTransformedCoords(transformedCoords) | 102 , fTransformedCoords(transformedCoordVars) |
79 , fTexSamplers(texSamplers) | 103 , fTexSamplers(texSamplers) |
80 , fBufferSamplers(bufferSamplers) | 104 , fBufferSamplers(bufferSamplers) |
81 , fGpImplementsDistanceVector(gpImplementsDistanceVector) {} | 105 , fGpImplementsDistanceVector(gpImplementsDistanceVector) {} |
82 GrGLSLFPFragmentBuilder* fFragBuilder; | 106 GrGLSLFPFragmentBuilder* fFragBuilder; |
83 GrGLSLUniformHandler* fUniformHandler; | 107 GrGLSLUniformHandler* fUniformHandler; |
84 const GrGLSLCaps* fGLSLCaps; | 108 const GrGLSLCaps* fGLSLCaps; |
85 const GrFragmentProcessor& fFp; | 109 const GrFragmentProcessor& fFp; |
86 const char* fOutputColor; | 110 const char* fOutputColor; |
87 const char* fInputColor; | 111 const char* fInputColor; |
88 const SkTArray<GrShaderVar>& fTransformedCoords; | 112 const TransformedCoordVars& fTransformedCoords; |
89 const SamplerHandle* fTexSamplers; | 113 const SamplerHandle* fTexSamplers; |
90 const SamplerHandle* fBufferSamplers; | 114 const SamplerHandle* fBufferSamplers; |
91 bool fGpImplementsDistanceVector; | 115 bool fGpImplementsDistanceVector; |
92 }; | 116 }; |
93 | 117 |
94 virtual void emitCode(EmitArgs&) = 0; | 118 virtual void emitCode(EmitArgs&) = 0; |
95 | 119 |
96 void setData(const GrGLSLProgramDataManager& pdman, const GrFragmentProcesso
r& processor); | 120 void setData(const GrGLSLProgramDataManager& pdman, const GrFragmentProcesso
r& processor); |
97 | 121 |
98 static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuil
der*) {} | 122 static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuil
der*) {} |
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128 | 152 |
129 private: | 153 private: |
130 void internalEmitChild(int, const char*, const char*, EmitArgs&); | 154 void internalEmitChild(int, const char*, const char*, EmitArgs&); |
131 | 155 |
132 SkTArray<GrGLSLFragmentProcessor*, true> fChildProcessors; | 156 SkTArray<GrGLSLFragmentProcessor*, true> fChildProcessors; |
133 | 157 |
134 friend class GrFragmentProcessor; | 158 friend class GrFragmentProcessor; |
135 }; | 159 }; |
136 | 160 |
137 #endif | 161 #endif |
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