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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 GrGLFragmentOnlyProgramBuilder_DEFINED |
| 9 #define GrGLFragmentOnlyProgramBuilder_DEFINED |
| 10 |
| 11 #include "GrGLProgramBuilder.h" |
| 12 |
| 13 class GrGLFragmentOnlyProgramBuilder : public GrGLProgramBuilder { |
| 14 public: |
| 15 GrGLFragmentOnlyProgramBuilder(GrGpuGL*, const GrOptDrawState&, const GrGLPr
ogramDesc&); |
| 16 |
| 17 int addTexCoordSets(int count); |
| 18 |
| 19 private: |
| 20 virtual void createAndEmitEffects(const GrGeometryStage* geometryProcessor, |
| 21 const GrFragmentStage* colorStages[], |
| 22 const GrFragmentStage* coverageStages[], |
| 23 GrGLSLExpr4* inputColor, |
| 24 GrGLSLExpr4* inputCoverage) SK_OVERRIDE; |
| 25 |
| 26 GrGLProgramEffects* onCreateAndEmitEffects(const GrFragmentStage* effectStag
es[], |
| 27 int effectCnt, |
| 28 const GrGLProgramDesc::EffectKeyP
rovider&, |
| 29 GrGLSLExpr4* inOutFSColor); |
| 30 |
| 31 virtual void emitEffect(const GrProcessorStage& stage, |
| 32 const GrProcessorKey& key, |
| 33 const char* outColor, |
| 34 const char* inColor, |
| 35 int stageIndex) SK_OVERRIDE; |
| 36 |
| 37 /** |
| 38 * Helper for emitEffect(). Allocates texture units from the builder for eac
h transform in an |
| 39 * effect. The transforms all use adjacent texture units. They either use tw
o or three of the |
| 40 * coordinates at a given texture unit, depending on if they need perspectiv
e interpolation. |
| 41 * The expressions to access the transformed coords (i.e. 'vec2(gl_TexCoord[
0])') as well as the |
| 42 * types are appended to the TransformedCoordsArray* object, which is in tur
n passed to the |
| 43 * effect's emitCode() function. |
| 44 */ |
| 45 void setupPathTexGen(const GrProcessorStage&, GrGLProcessor::TransformedCoor
dsArray*); |
| 46 |
| 47 virtual GrGLProgramEffects* getProgramEffects() SK_OVERRIDE { return fProgra
mEffects.get(); } |
| 48 |
| 49 typedef GrGLProgramDesc::EffectKeyProvider EffectKeyProvider; |
| 50 |
| 51 SkAutoTDelete<GrGLPathTexGenProgramEffects> fProgramEffects; |
| 52 |
| 53 typedef GrGLProgramBuilder INHERITED; |
| 54 }; |
| 55 |
| 56 #endif |
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