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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 "GrGLFragmentOnlyProgramBuilder.h" | 8 #include "GrGLFragmentOnlyProgramBuilder.h" |
9 #include "../GrGpuGL.h" | 9 #include "../GrGpuGL.h" |
10 | 10 |
11 GrGLFragmentOnlyProgramBuilder::GrGLFragmentOnlyProgramBuilder(GrGpuGL* gpu, | 11 GrGLFragmentOnlyProgramBuilder::GrGLFragmentOnlyProgramBuilder(GrGpuGL* gpu, |
12 const GrGLProgram
Desc& desc) | 12 const GrGLProgram
Desc& desc) |
13 : INHERITED(gpu, desc) { | 13 : INHERITED(gpu, desc) { |
14 SkASSERT(!desc.getHeader().fRequiresVertexShader); | 14 SkASSERT(!desc.getHeader().fRequiresVertexShader); |
15 SkASSERT(gpu->glCaps().pathRenderingSupport()); | 15 SkASSERT(gpu->glCaps().pathRenderingSupport()); |
16 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fColorIn
put); | 16 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fColorIn
put); |
17 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fCoverag
eInput); | 17 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fCoverag
eInput); |
18 } | 18 } |
19 | 19 |
20 int GrGLFragmentOnlyProgramBuilder::addTexCoordSets(int count) { | 20 int GrGLFragmentOnlyProgramBuilder::addTexCoordSets(int count) { |
21 int firstFreeCoordSet = fTexCoordSetCnt; | 21 int firstFreeCoordSet = fTexCoordSetCnt; |
22 fTexCoordSetCnt += count; | 22 fTexCoordSetCnt += count; |
23 SkASSERT(gpu()->glCaps().maxFixedFunctionTextureCoords() >= fTexCoordSetCnt)
; | 23 SkASSERT(gpu()->glCaps().maxFixedFunctionTextureCoords() >= fTexCoordSetCnt)
; |
24 return firstFreeCoordSet; | 24 return firstFreeCoordSet; |
25 } | 25 } |
26 | 26 |
27 GrGLProgramEffects* GrGLFragmentOnlyProgramBuilder::createAndEmitEffects( | 27 void |
| 28 GrGLFragmentOnlyProgramBuilder::createAndEmitEffects(const GrEffectStage* geomet
ryProcessor, |
| 29 const GrEffectStage* colorS
tages[], |
| 30 const GrEffectStage* covera
geStages[], |
| 31 GrGLSLExpr4* inputColor, |
| 32 GrGLSLExpr4* inputCoverage)
{ |
| 33 /////////////////////////////////////////////////////////////////////////// |
| 34 // emit the per-effect code for both color and coverage effects |
| 35 |
| 36 EffectKeyProvider colorKeyProvider(&this->desc(), EffectKeyProvider::kColor_
EffectType); |
| 37 fColorEffects.reset(this->onCreateAndEmitEffects(colorStages, |
| 38 this->desc().numColorEffect
s(), |
| 39 colorKeyProvider, |
| 40 inputColor)); |
| 41 |
| 42 EffectKeyProvider coverageKeyProvider(&this->desc(), EffectKeyProvider::kCov
erage_EffectType); |
| 43 fCoverageEffects.reset(this->onCreateAndEmitEffects(coverageStages, |
| 44 this->desc().numCoverage
Effects(), |
| 45 coverageKeyProvider, |
| 46 inputCoverage)); |
| 47 } |
| 48 |
| 49 GrGLProgramEffects* GrGLFragmentOnlyProgramBuilder::onCreateAndEmitEffects( |
28 const GrEffectStage* effectStages[], int effectCnt, | 50 const GrEffectStage* effectStages[], int effectCnt, |
29 const GrGLProgramDesc::EffectKeyProvider& keyProvider, GrGLSLExpr4* inOu
tFSColor) { | 51 const GrGLProgramDesc::EffectKeyProvider& keyProvider, GrGLSLExpr4* inOu
tFSColor) { |
30 | 52 |
31 GrGLPathTexGenProgramEffectsBuilder pathTexGenEffectsBuilder(this, | 53 fProgramEffects.reset(SkNEW_ARGS(GrGLPathTexGenProgramEffects, (effectCnt)))
; |
32 effectCnt); | 54 this->INHERITED::createAndEmitEffects(effectStages, |
33 this->INHERITED::createAndEmitEffects(&pathTexGenEffectsBuilder, | |
34 effectStages, | |
35 effectCnt, | 55 effectCnt, |
36 keyProvider, | 56 keyProvider, |
37 inOutFSColor); | 57 inOutFSColor); |
38 return pathTexGenEffectsBuilder.finish(); | 58 return fProgramEffects.detach(); |
39 } | 59 } |
| 60 |
| 61 void GrGLFragmentOnlyProgramBuilder::emitEffect(const GrEffectStage& stage, |
| 62 const GrEffectKey& key, |
| 63 const char* outColor, |
| 64 const char* inColor, |
| 65 int stageIndex) { |
| 66 SkASSERT(fProgramEffects.get()); |
| 67 const GrEffect& effect = *stage.getEffect(); |
| 68 SkASSERT(0 == effect.getVertexAttribs().count()); |
| 69 |
| 70 SkSTArray<2, GrGLEffect::TransformedCoords> coords(effect.numTransforms()); |
| 71 SkSTArray<4, GrGLEffect::TextureSampler> samplers(effect.numTextures()); |
| 72 |
| 73 this->setupPathTexGen(stage, &coords); |
| 74 this->emitSamplers(effect, &samplers); |
| 75 |
| 76 GrGLEffect* glEffect = effect.getFactory().createGLInstance(effect); |
| 77 SkASSERT(!glEffect->isVertexEffect()); |
| 78 fProgramEffects->addEffect(glEffect); |
| 79 |
| 80 GrGLFragmentShaderBuilder* fsBuilder = this->getFragmentShaderBuilder(); |
| 81 // Enclose custom code in a block to avoid namespace conflicts |
| 82 SkString openBrace; |
| 83 openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name()); |
| 84 fsBuilder->codeAppend(openBrace.c_str()); |
| 85 |
| 86 glEffect->emitCode(this, effect, key, outColor, inColor, coords, samplers); |
| 87 |
| 88 fsBuilder->codeAppend("\t}\n"); |
| 89 } |
| 90 |
| 91 void GrGLFragmentOnlyProgramBuilder::setupPathTexGen(const GrEffectStage& effect
Stage, |
| 92 GrGLEffect::TransformedCoordsArray* o
utCoords) { |
| 93 int numTransforms = effectStage.getEffect()->numTransforms(); |
| 94 int texCoordIndex = this->addTexCoordSets(numTransforms); |
| 95 |
| 96 fProgramEffects->addTransforms(texCoordIndex); |
| 97 |
| 98 SkString name; |
| 99 for (int t = 0; t < numTransforms; ++t) { |
| 100 GrSLType type = |
| 101 effectStage.isPerspectiveCoordTransform(t, false) ? |
| 102 kVec3f_GrSLType : |
| 103 kVec2f_GrSLType; |
| 104 |
| 105 name.printf("%s(gl_TexCoord[%i])", GrGLSLTypeString(type), texCoordIndex
++); |
| 106 SkNEW_APPEND_TO_TARRAY(outCoords, GrGLEffect::TransformedCoords, (name,
type)); |
| 107 } |
| 108 } |
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