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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 "GrSimpleTextureEffect.h"
#include "gl/GrGLEffect.h"
#include "gl/GrGLEffectMatrix.h"
#include "gl/GrGLSL.h"
#include "gl/GrGLTexture.h"
#include "GrTBackendEffectFactory.h"
#include "GrTexture.h"
class GrGLSimpleTextureEffect : public GrGLEffect {
public:
GrGLSimpleTextureEffect(const GrBackendEffectFactory& factory, const GrDrawEffect& drawEffect)
: INHERITED (factory) {
GrEffect::CoordsType coordsType =
drawEffect.castEffect<GrSimpleTextureEffect>().coordsType();
if (GrEffect::kCustom_CoordsType != coordsType) {
SkNEW_IN_TLAZY(&fEffectMatrix, GrGLEffectMatrix, (coordsType));
}
}
virtual bool requiresVertexShader(const GrDrawEffect& drawEffect) const SK_OVERRIDE {
const GrSimpleTextureEffect& ste = drawEffect.castEffect<GrSimpleTextureEffect>();
return GrEffect::kCustom_CoordsType == ste.coordsType();
}
virtual void emitCode(GrGLShaderBuilder* builder,
const GrDrawEffect& drawEffect,
EffectKey key,
const char* outputColor,
const char* inputColor,
const TextureSamplerArray& samplers) SK_OVERRIDE {
const GrSimpleTextureEffect& ste = drawEffect.castEffect<GrSimpleTextureEffect>();
SkString fsCoordName;
GrSLType fsCoordSLType;
if (GrEffect::kCustom_CoordsType == ste.coordsType()) {
SkASSERT(ste.getMatrix().isIdentity());
SkASSERT(1 == ste.numVertexAttribs());
fsCoordSLType = kVec2f_GrSLType;
const char* vsVaryingName;
const char* fsVaryingNamePtr;
GrGLShaderBuilder::VertexBuilder* vertexBuilder = builder->getVertexBuilder();
SkASSERT(NULL != vertexBuilder);
vertexBuilder->addVarying(kVec2f_GrSLType, "textureCoords", &vsVaryingName, &fsVaryingNamePtr);
fsCoordName = fsVaryingNamePtr;
const char* attrName =
vertexBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0])->c_str();
vertexBuilder->vsCodeAppendf("\t%s = %s;\n", vsVaryingName, attrName);
} else {
fsCoordSLType = fEffectMatrix.get()->emitCode(builder, key, &fsCoordName);
}
builder->fsCodeAppendf("\t%s = ", outputColor);
builder->fsAppendTextureLookupAndModulate(inputColor,
samplers[0],
fsCoordName.c_str(),
fsCoordSLType);
builder->fsCodeAppend(";\n");
}
static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
const GrSimpleTextureEffect& ste = drawEffect.castEffect<GrSimpleTextureEffect>();
if (GrEffect::kCustom_CoordsType == ste.coordsType()) {
return 1 << GrGLEffectMatrix::kKeyBits;
} else {
return GrGLEffectMatrix::GenKey(ste.getMatrix(),
drawEffect,
ste.coordsType(),
ste.texture(0));
}
}
virtual void setData(const GrGLUniformManager& uman,
const GrDrawEffect& drawEffect) SK_OVERRIDE {
const GrSimpleTextureEffect& ste = drawEffect.castEffect<GrSimpleTextureEffect>();
if (GrEffect::kCustom_CoordsType == ste.coordsType()) {
SkASSERT(ste.getMatrix().isIdentity());
} else {
fEffectMatrix.get()->setData(uman, ste.getMatrix(), drawEffect, ste.texture(0));
}
}
private:
SkTLazy<GrGLEffectMatrix> fEffectMatrix;
typedef GrGLEffect INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
void GrSimpleTextureEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
this->updateConstantColorComponentsForModulation(color, validFlags);
}
const GrBackendEffectFactory& GrSimpleTextureEffect::getFactory() const {
return GrTBackendEffectFactory<GrSimpleTextureEffect>::getInstance();
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_EFFECT_TEST(GrSimpleTextureEffect);
GrEffectRef* GrSimpleTextureEffect::TestCreate(SkMWCRandom* random,
GrContext*,
const GrDrawTargetCaps&,
GrTexture* textures[]) {
int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
GrEffectUnitTest::kAlphaTextureIdx;
static const SkShader::TileMode kTileModes[] = {
SkShader::kClamp_TileMode,
SkShader::kRepeat_TileMode,
SkShader::kMirror_TileMode,
};
SkShader::TileMode tileModes[] = {
kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
};
GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBilerp_FilterMode :
GrTextureParams::kNone_FilterMode);
static const CoordsType kCoordsTypes[] = {
kLocal_CoordsType,
kPosition_CoordsType,
kCustom_CoordsType
};
CoordsType coordsType = kCoordsTypes[random->nextULessThan(GR_ARRAY_COUNT(kCoordsTypes))];
if (kCustom_CoordsType == coordsType) {
return GrSimpleTextureEffect::CreateWithCustomCoords(textures[texIdx], params);
} else {
const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
return GrSimpleTextureEffect::Create(textures[texIdx], matrix);
}
}
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