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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.
*/
#include "GrYUVEffect.h"
#include "GrCoordTransform.h"
#include "GrFragmentProcessor.h"
#include "GrProcessor.h"
#include "GrTextureProxy.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLProgramDataManager.h"
#include "glsl/GrGLSLUniformHandler.h"
namespace {
static const float kJPEGConversionMatrix[16] = {
1.0f, 0.0f, 1.402f, -0.703749f,
1.0f, -0.344136f, -0.714136f, 0.531211f,
1.0f, 1.772f, 0.0f, -0.889475f,
0.0f, 0.0f, 0.0f, 1.0
};
static const float kRec601ConversionMatrix[16] = {
1.164f, 0.0f, 1.596f, -0.87075f,
1.164f, -0.391f, -0.813f, 0.52925f,
1.164f, 2.018f, 0.0f, -1.08175f,
0.0f, 0.0f, 0.0f, 1.0}
;
static const float kRec709ConversionMatrix[16] = {
1.164f, 0.0f, 1.793f, -0.96925f,
1.164f, -0.213f, -0.533f, 0.30025f,
1.164f, 2.112f, 0.0f, -1.12875f,
0.0f, 0.0f, 0.0f, 1.0f}
;
class YUVtoRGBEffect : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(sk_sp<GrTextureProxy> yProxy,
sk_sp<GrTextureProxy> uProxy,
sk_sp<GrTextureProxy> vProxy,
const SkISize sizes[3],
SkYUVColorSpace colorSpace, bool nv12) {
SkScalar w[3], h[3];
w[0] = SkIntToScalar(sizes[0].fWidth);
h[0] = SkIntToScalar(sizes[0].fHeight);
w[1] = SkIntToScalar(sizes[1].fWidth);
h[1] = SkIntToScalar(sizes[1].fHeight);
w[2] = SkIntToScalar(sizes[2].fWidth);
h[2] = SkIntToScalar(sizes[2].fHeight);
const SkMatrix yuvMatrix[3] = {
SkMatrix::I(),
SkMatrix::MakeScale(w[1] / w[0], h[1] / h[0]),
SkMatrix::MakeScale(w[2] / w[0], h[2] / h[0])
};
GrSamplerState::Filter uvFilterMode =
((sizes[1].fWidth != sizes[0].fWidth) ||
(sizes[1].fHeight != sizes[0].fHeight) ||
(sizes[2].fWidth != sizes[0].fWidth) ||
(sizes[2].fHeight != sizes[0].fHeight)) ?
GrSamplerState::Filter::kBilerp :
GrSamplerState::Filter::kNearest;
return std::unique_ptr<GrFragmentProcessor>(
new YUVtoRGBEffect(std::move(yProxy), std::move(uProxy), std::move(vProxy),
yuvMatrix, uvFilterMode, colorSpace, nv12));
}
const char* name() const override { return "YUV to RGB"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
return std::unique_ptr<GrFragmentProcessor>(new YUVtoRGBEffect(*this));
}
SkYUVColorSpace getColorSpace() const { return fColorSpace; }
bool isNV12() const {
return fNV12;
}
class GLSLProcessor : public GrGLSLFragmentProcessor {
public:
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
const YUVtoRGBEffect& effect = args.fFp.cast<YUVtoRGBEffect>();
const char* colorSpaceMatrix = nullptr;
fMatrixUni = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf4x4_GrSLType,
"ColorSpaceMatrix", &colorSpaceMatrix);
fragBuilder->codeAppendf("%s = half4(", args.fOutputColor);
fragBuilder->appendTextureLookup(args.fTexSamplers[0],
args.fTransformedCoords[0].c_str(),
args.fTransformedCoords[0].getType());
fragBuilder->codeAppend(".r,");
fragBuilder->appendTextureLookup(args.fTexSamplers[1],
args.fTransformedCoords[1].c_str(),
args.fTransformedCoords[1].getType());
if (effect.fNV12) {
fragBuilder->codeAppendf(".rg,");
} else {
fragBuilder->codeAppend(".r,");
fragBuilder->appendTextureLookup(args.fTexSamplers[2],
args.fTransformedCoords[2].c_str(),
args.fTransformedCoords[2].getType());
fragBuilder->codeAppendf(".r,");
}
fragBuilder->codeAppendf("1.0) * %s;", colorSpaceMatrix);
}
protected:
void onSetData(const GrGLSLProgramDataManager& pdman,
const GrFragmentProcessor& processor) override {
const YUVtoRGBEffect& yuvEffect = processor.cast<YUVtoRGBEffect>();
switch (yuvEffect.getColorSpace()) {
case kJPEG_SkYUVColorSpace:
pdman.setMatrix4f(fMatrixUni, kJPEGConversionMatrix);
break;
case kRec601_SkYUVColorSpace:
pdman.setMatrix4f(fMatrixUni, kRec601ConversionMatrix);
break;
case kRec709_SkYUVColorSpace:
pdman.setMatrix4f(fMatrixUni, kRec709ConversionMatrix);
break;
}
}
private:
GrGLSLProgramDataManager::UniformHandle fMatrixUni;
typedef GrGLSLFragmentProcessor INHERITED;
};
private:
YUVtoRGBEffect(sk_sp<GrTextureProxy> yProxy, sk_sp<GrTextureProxy> uProxy,
sk_sp<GrTextureProxy> vProxy, const SkMatrix yuvMatrix[3],
GrSamplerState::Filter uvFilterMode, SkYUVColorSpace colorSpace, bool nv12)
: INHERITED(kPreservesOpaqueInput_OptimizationFlag)
, fYTransform(yuvMatrix[0], yProxy.get())
, fYSampler(std::move(yProxy))
, fUTransform(yuvMatrix[1], uProxy.get())
, fUSampler(std::move(uProxy), uvFilterMode)
, fVSampler(vProxy, uvFilterMode)
, fColorSpace(colorSpace)
, fNV12(nv12) {
this->initClassID<YUVtoRGBEffect>();
this->addCoordTransform(&fYTransform);
this->addTextureSampler(&fYSampler);
this->addCoordTransform(&fUTransform);
this->addTextureSampler(&fUSampler);
if (!fNV12) {
fVTransform = GrCoordTransform(yuvMatrix[2], vProxy.get());
this->addCoordTransform(&fVTransform);
this->addTextureSampler(&fVSampler);
}
}
YUVtoRGBEffect(const YUVtoRGBEffect& that)
: INHERITED(kPreservesOpaqueInput_OptimizationFlag)
, fYTransform(that.fYTransform)
, fYSampler(that.fYSampler)
, fUTransform(that.fUTransform)
, fUSampler(that.fUSampler)
, fVTransform(that.fVTransform)
, fVSampler(that.fVSampler)
, fColorSpace(that.fColorSpace)
, fNV12(that.fNV12) {
this->initClassID<YUVtoRGBEffect>();
this->addCoordTransform(&fYTransform);
this->addTextureSampler(&fYSampler);
this->addCoordTransform(&fUTransform);
this->addTextureSampler(&fUSampler);
if (!fNV12) {
this->addCoordTransform(&fVTransform);
this->addTextureSampler(&fVSampler);
}
}
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
return new GLSLProcessor;
}
void onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override {
b->add32(fNV12);
}
bool onIsEqual(const GrFragmentProcessor& sBase) const override {
const YUVtoRGBEffect& s = sBase.cast<YUVtoRGBEffect>();
return (fColorSpace == s.getColorSpace()) && (fNV12 == s.isNV12());
}
GrCoordTransform fYTransform;
TextureSampler fYSampler;
GrCoordTransform fUTransform;
TextureSampler fUSampler;
GrCoordTransform fVTransform;
TextureSampler fVSampler;
SkYUVColorSpace fColorSpace;
bool fNV12;
typedef GrFragmentProcessor INHERITED;
};
}
//////////////////////////////////////////////////////////////////////////////
std::unique_ptr<GrFragmentProcessor> GrYUVEffect::MakeYUVToRGB(
sk_sp<GrTextureProxy> yProxy, sk_sp<GrTextureProxy> uProxy, sk_sp<GrTextureProxy> vProxy,
const SkISize sizes[3], SkYUVColorSpace colorSpace, bool nv12) {
SkASSERT(yProxy && uProxy && vProxy && sizes);
return YUVtoRGBEffect::Make(std::move(yProxy), std::move(uProxy), std::move(vProxy),
sizes, colorSpace, nv12);
}
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