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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/GrGLEffect.h"
#include "gl/GrGLEffectMatrix.h"
#include "gl/GrGLSL.h"
#include "gl/GrGLTexture.h"
#include "GrTBackendEffectFactory.h"
#include "GrTexture.h"
class GrGLSingleTextureEffect : public GrGLEffect {
public:
GrGLSingleTextureEffect(const GrBackendEffectFactory& factory, const GrEffect&)
: INHERITED (factory) {}
virtual void emitCode(GrGLShaderBuilder* builder,
const GrEffectStage&,
EffectKey key,
const char* vertexCoords,
const char* outputColor,
const char* inputColor,
const TextureSamplerArray& samplers) SK_OVERRIDE {
const char* coordName;
GrSLType coordType = fEffectMatrix.emitCode(builder, key, vertexCoords, &coordName);
builder->fFSCode.appendf("\t%s = ", outputColor);
builder->appendTextureLookupAndModulate(&builder->fFSCode,
inputColor,
samplers[0],
coordName,
coordType);
builder->fFSCode.append(";\n");
}
static inline EffectKey GenKey(const GrEffectStage& stage, const GrGLCaps&) {
const GrSingleTextureEffect& ste =
static_cast<const GrSingleTextureEffect&>(*stage.getEffect());
return GrGLEffectMatrix::GenKey(ste.getMatrix(),
stage.getCoordChangeMatrix(),
ste.texture(0));
}
virtual void setData(const GrGLUniformManager& uman, const GrEffectStage& stage) SK_OVERRIDE {
const GrSingleTextureEffect& ste =
static_cast<const GrSingleTextureEffect&>(*stage.getEffect());
fEffectMatrix.setData(uman, ste.getMatrix(), stage.getCoordChangeMatrix(), ste.texture(0));
}
private:
GrGLEffectMatrix fEffectMatrix;
typedef GrGLEffect INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
GrSingleTextureEffect::GrSingleTextureEffect(GrTexture* texture, const SkMatrix& m)
: fTextureAccess(texture)
, fMatrix(m) {
this->addTextureAccess(&fTextureAccess);
}
GrSingleTextureEffect::GrSingleTextureEffect(GrTexture* texture, const SkMatrix& m, bool bilerp)
: fTextureAccess(texture, bilerp)
, fMatrix(m) {
this->addTextureAccess(&fTextureAccess);
}
GrSingleTextureEffect::GrSingleTextureEffect(GrTexture* texture,
const SkMatrix& m,
const GrTextureParams& params)
: fTextureAccess(texture, params)
, fMatrix(m) {
this->addTextureAccess(&fTextureAccess);
}
GrSingleTextureEffect::~GrSingleTextureEffect() {
}
void GrSingleTextureEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
// If the input alpha is 0xff and the texture has no alpha channel, then the output alpha is
// 0xff
if ((*validFlags & kA_ValidComponentFlag) && 0xFF == GrColorUnpackA(*color) &&
GrPixelConfigIsOpaque(fTextureAccess.getTexture()->config())) {
*validFlags = kA_ValidComponentFlag;
} else {
*validFlags = 0;
}
}
const GrBackendEffectFactory& GrSingleTextureEffect::getFactory() const {
return GrTBackendEffectFactory<GrSingleTextureEffect>::getInstance();
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_EFFECT_TEST(GrSingleTextureEffect);
GrEffectRef* GrSingleTextureEffect::TestCreate(SkRandom* random,
GrContext* context,
GrTexture* textures[]) {
int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
GrEffectUnitTest::kAlphaTextureIdx;
const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
return GrSingleTextureEffect::Create(textures[texIdx], matrix);
}
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