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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLFragmentOnlyProgramBuilder_DEFINED
#define GrGLFragmentOnlyProgramBuilder_DEFINED
#include "GrGLProgramBuilder.h"
class GrGLFragmentOnlyProgramBuilder : public GrGLProgramBuilder {
public:
GrGLFragmentOnlyProgramBuilder(GrGpuGL*, const GrOptDrawState&, const GrGLProgramDesc&);
int addTexCoordSets(int count);
private:
virtual void createAndEmitEffects(const GrGeometryStage* geometryProcessor,
const GrFragmentStage* colorStages[],
const GrFragmentStage* coverageStages[],
GrGLSLExpr4* inputColor,
GrGLSLExpr4* inputCoverage) SK_OVERRIDE;
GrGLProgramEffects* onCreateAndEmitEffects(const GrFragmentStage* effectStages[],
int effectCnt,
const GrGLProgramDesc::EffectKeyProvider&,
GrGLSLExpr4* inOutFSColor);
virtual void emitEffect(const GrProcessorStage& stage,
const GrProcessorKey& key,
const char* outColor,
const char* inColor,
int stageIndex) SK_OVERRIDE;
/**
* Helper for emitEffect(). Allocates texture units from the builder for each transform in an
* effect. The transforms all use adjacent texture units. They either use two or three of the
* coordinates at a given texture unit, depending on if they need perspective interpolation.
* The expressions to access the transformed coords (i.e. 'vec2(gl_TexCoord[0])') as well as the
* types are appended to the TransformedCoordsArray* object, which is in turn passed to the
* effect's emitCode() function.
*/
void setupPathTexGen(const GrProcessorStage&, GrGLProcessor::TransformedCoordsArray*);
virtual GrGLProgramEffects* getProgramEffects() SK_OVERRIDE { return fProgramEffects.get(); }
typedef GrGLProgramDesc::EffectKeyProvider EffectKeyProvider;
SkAutoTDelete<GrGLPathTexGenProgramEffects> fProgramEffects;
typedef GrGLProgramBuilder INHERITED;
};
#endif
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