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| 1 /* | |
| 2 * Copyright 2014 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #ifndef GrGLFullProgramBuilder_DEFINED | |
| 9 #define GrGLFullProgramBuilder_DEFINED | |
| 10 | |
| 11 #include "GrGLProgramBuilder.h" | |
| 12 #include "../GrGLGeometryProcessor.h" | |
| 13 | |
| 14 class GrGLVertexProgramEffects; | |
| 15 | |
| 16 class GrGLFullProgramBuilder : public GrGLProgramBuilder { | |
| 17 public: | |
| 18 GrGLFullProgramBuilder(GrGpuGL*, const GrGLProgramDesc&); | |
| 19 | |
| 20 /** Add a varying variable to the current program to pass values between vert
ex and fragment | |
| 21 shaders. If the last two parameters are non-NULL, they are filled in wit
h the name | |
| 22 generated. */ | |
| 23 void addVarying(GrSLType type, | |
| 24 const char* name, | |
| 25 const char** vsOutName = NULL, | |
| 26 const char** fsInName = NULL, | |
| 27 GrGLShaderVar::Precision fsPrecision=GrGLShaderVar::kDefault
_Precision); | |
| 28 | |
| 29 /** Add a separable varying input variable to the current program. | |
| 30 * A separable varying (fragment shader input) is a varying that can be used
also when vertex | |
| 31 * shaders are not used. With a vertex shader, the operation is same as with
other | |
| 32 * varyings. Without a vertex shader, such as with NV_path_rendering, GL API
s are used to | |
| 33 * populate the variable. The APIs can refer to the variable through the ret
urned handle. | |
| 34 */ | |
| 35 VaryingHandle addSeparableVarying(GrSLType type, | |
| 36 const char* name, | |
| 37 const char** vsOutName, | |
| 38 const char** fsInName); | |
| 39 | |
| 40 GrGLVertexShaderBuilder* getVertexShaderBuilder() { return &fVS; } | |
| 41 | |
| 42 /* | |
| 43 * This non-virtual call will hide the parent call to prevent GPs from acces
sing fragment shader | |
| 44 * functionality they shouldn't be using | |
| 45 */ | |
| 46 GrGLProcessorFragmentShaderBuilder* getFragmentShaderBuilder() { return &fFS
; } | |
| 47 | |
| 48 private: | |
| 49 virtual void createAndEmitEffects(const GrGeometryStage* geometryProcessor, | |
| 50 const GrFragmentStage* colorStages[], | |
| 51 const GrFragmentStage* coverageStages[], | |
| 52 GrGLSLExpr4* inputColor, | |
| 53 GrGLSLExpr4* inputCoverage) SK_OVERRIDE; | |
| 54 | |
| 55 GrGLProgramEffects* onCreateAndEmitEffects(const GrFragmentStage* effectStag
es[], | |
| 56 int effectCnt, | |
| 57 const GrGLProgramDesc::EffectKeyP
rovider&, | |
| 58 GrGLSLExpr4* inOutFSColor); | |
| 59 | |
| 60 class GrGLGeometryProcessorEmitter : public GrGLProgramBuilder::GrGLProcesso
rEmitterInterface { | |
| 61 public: | |
| 62 GrGLGeometryProcessorEmitter(GrGLFullProgramBuilder* builder) | |
| 63 : fBuilder(builder) | |
| 64 , fGeometryProcessor(NULL) | |
| 65 , fGLGeometryProcessor(NULL) {} | |
| 66 virtual ~GrGLGeometryProcessorEmitter() {} | |
| 67 void set(const GrGeometryProcessor* gp) { | |
| 68 SkASSERT(NULL == fGeometryProcessor); | |
| 69 fGeometryProcessor = gp; | |
| 70 } | |
| 71 virtual GrGLProcessor* createGLInstance() { | |
| 72 SkASSERT(fGeometryProcessor); | |
| 73 SkASSERT(NULL == fGLGeometryProcessor); | |
| 74 fGLGeometryProcessor = | |
| 75 fGeometryProcessor->getFactory().createGLInstance(*fGeom
etryProcessor); | |
| 76 return fGLGeometryProcessor; | |
| 77 } | |
| 78 virtual void emit(const GrProcessorKey& key, | |
| 79 const char* outColor, | |
| 80 const char* inColor, | |
| 81 const GrGLProcessor::TransformedCoordsArray& coord
s, | |
| 82 const GrGLProcessor::TextureSamplerArray& samplers
) { | |
| 83 SkASSERT(fGeometryProcessor); | |
| 84 SkASSERT(fGLGeometryProcessor); | |
| 85 fGLGeometryProcessor->emitCode(fBuilder, *fGeometryProcessor, ke
y, outColor, | |
| 86 inColor, coords, samplers); | |
| 87 // this will not leak because it has already been used by create
GLInstance | |
| 88 fGLGeometryProcessor = NULL; | |
| 89 fGeometryProcessor = NULL; | |
| 90 } | |
| 91 private: | |
| 92 GrGLFullProgramBuilder* fBuilder; | |
| 93 const GrGeometryProcessor* fGeometryProcessor; | |
| 94 GrGLGeometryProcessor* fGLGeometryProcessor; | |
| 95 }; | |
| 96 | |
| 97 virtual void emitEffect(const GrProcessorStage& stage, | |
| 98 const GrProcessorKey& key, | |
| 99 const char* outColor, | |
| 100 const char* inColor, | |
| 101 int stageIndex) SK_OVERRIDE; | |
| 102 | |
| 103 /** | |
| 104 * Helper for emitEffect(). Emits code to implement an effect's coord transf
orms in the VS. | |
| 105 * Varyings are added as an outputs of the VS and inputs to the FS. The vary
ings may be either a | |
| 106 * vec2f or vec3f depending upon whether perspective interpolation is requir
ed or not. The names | |
| 107 * of the varyings in the VS and FS as well their types are appended to the | |
| 108 * TransformedCoordsArray* object, which is in turn passed to the effect's e
mitCode() function. | |
| 109 */ | |
| 110 void emitTransforms(const GrProcessorStage& effectStage, | |
| 111 GrGLProcessor::TransformedCoordsArray* outCoords); | |
| 112 | |
| 113 virtual bool compileAndAttachShaders(GrGLuint programId, | |
| 114 SkTDArray<GrGLuint>* shaderIds) const S
K_OVERRIDE; | |
| 115 | |
| 116 virtual void bindProgramLocations(GrGLuint programId) SK_OVERRIDE; | |
| 117 | |
| 118 virtual GrGLProgramEffects* getProgramEffects() SK_OVERRIDE { return fProgra
mEffects.get(); } | |
| 119 | |
| 120 typedef GrGLProgramDesc::EffectKeyProvider EffectKeyProvider; | |
| 121 | |
| 122 GrGLGeometryProcessorEmitter fGLGeometryProcessorEmitter; | |
| 123 GrGLGeometryShaderBuilder fGS; | |
| 124 GrGLVertexShaderBuilder fVS; | |
| 125 SkAutoTDelete<GrGLVertexProgramEffects> fProgramEffects; | |
| 126 | |
| 127 typedef GrGLProgramBuilder INHERITED; | |
| 128 }; | |
| 129 | |
| 130 #endif | |
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Chromium Code Reviews
Issue 611653002:
Cleanup of shader building system (Closed)
Base URL: https://skia.googlesource.com/skia.git@solo_gp