src/gpu/gl/builders/GrGLFragmentOnlyProgramBuilder.cpp - Issue 611653002: Cleanup of shader building system

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Issue 611653002: Cleanup of shader building system (Closed) Base URL: https://skia.googlesource.com/skia.git@solo_gp

Patch Set: more cleanup 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 GrGLProgram Desc& desc)

13 : INHERITED(gpu, desc) {

14 SkASSERT(desc.getHeader().fUseFragShaderOnly);

15 SkASSERT(gpu->glCaps().pathRenderingSupport());

16 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fColorIn put);

17 SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fCoverag eInput);

18 }

19

20 int GrGLFragmentOnlyProgramBuilder::addTexCoordSets(int count) {

21 int firstFreeCoordSet = fTexCoordSetCnt;

22 fTexCoordSetCnt += count;

23 SkASSERT(gpu()->glCaps().maxFixedFunctionTextureCoords() >= fTexCoordSetCnt) ;

24 return firstFreeCoordSet;

25 }

26

27 void

28 GrGLFragmentOnlyProgramBuilder::createAndEmitEffects(const GrGeometryStage* geom etryProcessor,

29 const GrFragmentStage* colo rStages[],

30 const GrFragmentStage* cove rageStages[],

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(

50 const GrFragmentStage* effectStages[], int effectCnt,

51 const GrGLProgramDesc::EffectKeyProvider& keyProvider, GrGLSLExpr4* inOu tFSColor) {

52 fProgramEffects.reset(SkNEW_ARGS(GrGLPathTexGenProgramEffects, (effectCnt))) ;

53 this->INHERITED::createAndEmitEffects(effectStages,

54 effectCnt,

55 keyProvider,

56 inOutFSColor);

57 return fProgramEffects.detach();

58 }

59

60 void GrGLFragmentOnlyProgramBuilder::emitEffect(const GrProcessorStage& stage,

61 const GrProcessorKey& key,

62 const char* outColor,

63 const char* inColor,

64 int stageIndex) {

65 SkASSERT(fProgramEffects.get());

66 const GrProcessor& effect = *stage.getProcessor();

67

68 SkSTArray<2, GrGLProcessor::TransformedCoords> coords(effect.numTransforms() );

69 SkSTArray<4, GrGLProcessor::TextureSampler> samplers(effect.numTextures());

70

71 this->setupPathTexGen(stage, &coords);

72 this->emitSamplers(effect, &samplers);

73

74 SkASSERT(fEffectEmitter);

75 GrGLProcessor* glEffect = fEffectEmitter->createGLInstance();

76 fProgramEffects->addEffect(glEffect);

77

78 GrGLFragmentShaderBuilder* fsBuilder = this->getFragmentShaderBuilder();

79 // Enclose custom code in a block to avoid namespace conflicts

80 SkString openBrace;

81 openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name());

82 fsBuilder->codeAppend(openBrace.c_str());

83

84 fEffectEmitter->emit(key, outColor, inColor, coords, samplers);

85

86 fsBuilder->codeAppend("\t}\n");

87 }

88

89 void GrGLFragmentOnlyProgramBuilder::setupPathTexGen(

90 const GrProcessorStage& effectStage, GrGLProcessor::TransformedCoordsArr ay* outCoords) {

91 int numTransforms = effectStage.getProcessor()->numTransforms();

92 int texCoordIndex = this->addTexCoordSets(numTransforms);

93

94 fProgramEffects->addTransforms(texCoordIndex);

95

96 SkString name;

97 for (int t = 0; t < numTransforms; ++t) {

98 GrSLType type =

99 effectStage.isPerspectiveCoordTransform(t, false) ?

100 kVec3f_GrSLType :

101 kVec2f_GrSLType;

102

103 name.printf("%s(gl_TexCoord[%i])", GrGLSLTypeString(type), texCoordIndex ++);

104 SkNEW_APPEND_TO_TARRAY(outCoords, GrGLProcessor::TransformedCoords, (nam e, type));

105 }

106 }

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