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Side by Side Diff: src/gpu/gl/builders/GrGLFragmentOnlyProgramBuilder.cpp

Issue 635533005: Revert of Cleanup of shader building system (Closed) Base URL: https://skia.googlesource.com/skia.git@solo_gp
Patch Set: Created 6 years, 2 months ago
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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 #include "GrGLFragmentOnlyProgramBuilder.h"
9 #include "../GrGpuGL.h"
10
11 GrGLFragmentOnlyProgramBuilder::GrGLFragmentOnlyProgramBuilder(GrGpuGL* gpu,
12 const GrOptDrawSt ate& optState,
13 const GrGLProgram Desc& desc)
14 : INHERITED(gpu, optState, desc) {
15 SkASSERT(desc.getHeader().fUseFragShaderOnly);
16 SkASSERT(gpu->glCaps().pathRenderingSupport());
17 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fColorIn put);
18 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fCoverag eInput);
19 }
20
21 int GrGLFragmentOnlyProgramBuilder::addTexCoordSets(int count) {
22 int firstFreeCoordSet = fTexCoordSetCnt;
23 fTexCoordSetCnt += count;
24 SkASSERT(gpu()->glCaps().maxFixedFunctionTextureCoords() >= fTexCoordSetCnt) ;
25 return firstFreeCoordSet;
26 }
27
28 void
29 GrGLFragmentOnlyProgramBuilder::createAndEmitEffects(const GrGeometryStage* geom etryProcessor,
30 const GrFragmentStage* colo rStages[],
31 const GrFragmentStage* cove rageStages[],
32 GrGLSLExpr4* inputColor,
33 GrGLSLExpr4* inputCoverage) {
34 ///////////////////////////////////////////////////////////////////////////
35 // emit the per-effect code for both color and coverage effects
36
37 EffectKeyProvider colorKeyProvider(&this->desc(), EffectKeyProvider::kColor_ EffectType);
38 fColorEffects.reset(this->onCreateAndEmitEffects(colorStages,
39 this->desc().numColorEffect s(),
40 colorKeyProvider,
41 inputColor));
42
43 EffectKeyProvider coverageKeyProvider(&this->desc(), EffectKeyProvider::kCov erage_EffectType);
44 fCoverageEffects.reset(this->onCreateAndEmitEffects(coverageStages,
45 this->desc().numCoverage Effects(),
46 coverageKeyProvider,
47 inputCoverage));
48 }
49
50 GrGLProgramEffects* GrGLFragmentOnlyProgramBuilder::onCreateAndEmitEffects(
51 const GrFragmentStage* effectStages[], int effectCnt,
52 const GrGLProgramDesc::EffectKeyProvider& keyProvider, GrGLSLExpr4* inOu tFSColor) {
53 fProgramEffects.reset(SkNEW_ARGS(GrGLPathTexGenProgramEffects, (effectCnt))) ;
54 this->INHERITED::createAndEmitEffects(effectStages,
55 effectCnt,
56 keyProvider,
57 inOutFSColor);
58 return fProgramEffects.detach();
59 }
60
61 void GrGLFragmentOnlyProgramBuilder::emitEffect(const GrProcessorStage& stage,
62 const GrProcessorKey& key,
63 const char* outColor,
64 const char* inColor,
65 int stageIndex) {
66 SkASSERT(fProgramEffects.get());
67 const GrProcessor& effect = *stage.getProcessor();
68
69 SkSTArray<2, GrGLProcessor::TransformedCoords> coords(effect.numTransforms() );
70 SkSTArray<4, GrGLProcessor::TextureSampler> samplers(effect.numTextures());
71
72 this->setupPathTexGen(stage, &coords);
73 this->emitSamplers(effect, &samplers);
74
75 SkASSERT(fEffectEmitter);
76 GrGLProcessor* glEffect = fEffectEmitter->createGLInstance();
77 fProgramEffects->addEffect(glEffect);
78
79 GrGLFragmentShaderBuilder* fsBuilder = this->getFragmentShaderBuilder();
80 // Enclose custom code in a block to avoid namespace conflicts
81 SkString openBrace;
82 openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name());
83 fsBuilder->codeAppend(openBrace.c_str());
84
85 fEffectEmitter->emit(key, outColor, inColor, coords, samplers);
86
87 fsBuilder->codeAppend("\t}\n");
88 }
89
90 void GrGLFragmentOnlyProgramBuilder::setupPathTexGen(
91 const GrProcessorStage& effectStage, GrGLProcessor::TransformedCoordsArr ay* outCoords) {
92 int numTransforms = effectStage.getProcessor()->numTransforms();
93 int texCoordIndex = this->addTexCoordSets(numTransforms);
94
95 fProgramEffects->addTransforms(texCoordIndex);
96
97 SkString name;
98 for (int t = 0; t < numTransforms; ++t) {
99 GrSLType type =
100 effectStage.isPerspectiveCoordTransform(t, false) ?
101 kVec3f_GrSLType :
102 kVec2f_GrSLType;
103
104 name.printf("%s(gl_TexCoord[%i])", GrGLSLTypeString(type), texCoordIndex ++);
105 SkNEW_APPEND_TO_TARRAY(outCoords, GrGLProcessor::TransformedCoords, (nam e, type));
106 }
107 }
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