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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "effects/GrSingleTextureEffect.h"
#include "gl/GrGLProgramStage.h"
#include "gl/GrGLSL.h"
#include "gl/GrGLTexture.h"
#include "GrProgramStageFactory.h"
#include "GrTexture.h"
class GrGLSingleTextureEffect : public GrGLProgramStage {
public:
GrGLSingleTextureEffect(const GrProgramStageFactory& factory,
const GrCustomStage& stage) : INHERITED (factory) { }
virtual void emitVS(GrGLShaderBuilder* builder,
const char* vertexCoords) SK_OVERRIDE { }
virtual void emitFS(GrGLShaderBuilder* builder,
const char* outputColor,
const char* inputColor,
const TextureSamplerArray& samplers) SK_OVERRIDE {
builder->fFSCode.appendf("\t%s = ", outputColor);
builder->appendTextureLookupAndModulate(&builder->fFSCode, inputColor, samplers[0]);
builder->fFSCode.append(";\n");
}
static inline StageKey GenKey(const GrCustomStage&, const GrGLCaps&) { return 0; }
private:
typedef GrGLProgramStage INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
GrSingleTextureEffect::GrSingleTextureEffect(GrTexture* texture)
: fTextureAccess(texture) {
}
GrSingleTextureEffect::~GrSingleTextureEffect() {
}
int GrSingleTextureEffect::numTextures() const {
return 1;
}
const GrTextureAccess& GrSingleTextureEffect::textureAccess(int index) const {
GrAssert(0 == index);
return fTextureAccess;
}
const GrProgramStageFactory& GrSingleTextureEffect::getFactory() const {
return GrTProgramStageFactory<GrSingleTextureEffect>::getInstance();
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_CUSTOM_STAGE_TEST(GrSingleTextureEffect);
GrCustomStage* GrSingleTextureEffect::TestCreate(SkRandom* random,
GrContext* context,
GrTexture* textures[]) {
int texIdx = random->nextBool() ? GrCustomStageUnitTest::kSkiaPMTextureIdx :
GrCustomStageUnitTest::kAlphaTextureIdx;
return SkNEW_ARGS(GrSingleTextureEffect, (textures[texIdx]));
}
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