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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkArithmeticMode_gpu.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrFragmentProcessor.h"
#include "GrInvariantOutput.h"
#include "GrProcessor.h"
#include "GrTexture.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLProgramDataManager.h"
#include "glsl/GrGLSLUniformHandler.h"
#include "glsl/GrGLSLXferProcessor.h"
static void add_arithmetic_code(GrGLSLFragmentBuilder* fragBuilder,
const char* srcColor,
const char* dstColor,
const char* outputColor,
const char* kUni,
bool enforcePMColor) {
// We don't try to optimize for this case at all
if (nullptr == srcColor) {
fragBuilder->codeAppend("const vec4 src = vec4(1);");
} else {
fragBuilder->codeAppendf("vec4 src = %s;", srcColor);
}
fragBuilder->codeAppendf("vec4 dst = %s;", dstColor);
fragBuilder->codeAppendf("%s = %s.x * src * dst + %s.y * src + %s.z * dst + %s.w;",
outputColor, kUni, kUni, kUni, kUni);
fragBuilder->codeAppendf("%s = clamp(%s, 0.0, 1.0);\n", outputColor, outputColor);
if (enforcePMColor) {
fragBuilder->codeAppendf("%s.rgb = min(%s.rgb, %s.a);",
outputColor, outputColor, outputColor);
}
}
class GLArithmeticFP : public GrGLSLFragmentProcessor {
public:
void emitCode(EmitArgs& args) override {
const GrArithmeticFP& arith = args.fFp.cast<GrArithmeticFP>();
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
SkString dstColor("dstColor");
this->emitChild(0, nullptr, &dstColor, args);
fKUni = args.fUniformHandler->addUniform(kFragment_GrShaderFlag,
kVec4f_GrSLType, kDefault_GrSLPrecision,
"k");
const char* kUni = args.fUniformHandler->getUniformCStr(fKUni);
add_arithmetic_code(fragBuilder,
args.fInputColor,
dstColor.c_str(),
args.fOutputColor,
kUni,
arith.enforcePMColor());
}
static void GenKey(const GrProcessor& proc, const GrShaderCaps&, GrProcessorKeyBuilder* b) {
const GrArithmeticFP& arith = proc.cast<GrArithmeticFP>();
uint32_t key = arith.enforcePMColor() ? 1 : 0;
b->add32(key);
}
protected:
void onSetData(const GrGLSLProgramDataManager& pdman, const GrProcessor& proc) override {
const GrArithmeticFP& arith = proc.cast<GrArithmeticFP>();
pdman.set4f(fKUni, arith.k1(), arith.k2(), arith.k3(), arith.k4());
}
private:
GrGLSLProgramDataManager::UniformHandle fKUni;
typedef GrGLSLFragmentProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
GrArithmeticFP::GrArithmeticFP(float k1, float k2, float k3, float k4, bool enforcePMColor,
sk_sp<GrFragmentProcessor> dst)
: fK1(k1), fK2(k2), fK3(k3), fK4(k4), fEnforcePMColor(enforcePMColor) {
this->initClassID<GrArithmeticFP>();
SkASSERT(dst);
SkDEBUGCODE(int dstIndex = )this->registerChildProcessor(std::move(dst));
SkASSERT(0 == dstIndex);
}
void GrArithmeticFP::onGetGLSLProcessorKey(const GrShaderCaps& caps,
GrProcessorKeyBuilder* b) const {
GLArithmeticFP::GenKey(*this, caps, b);
}
GrGLSLFragmentProcessor* GrArithmeticFP::onCreateGLSLInstance() const {
return new GLArithmeticFP;
}
bool GrArithmeticFP::onIsEqual(const GrFragmentProcessor& fpBase) const {
const GrArithmeticFP& fp = fpBase.cast<GrArithmeticFP>();
return fK1 == fp.fK1 &&
fK2 == fp.fK2 &&
fK3 == fp.fK3 &&
fK4 == fp.fK4 &&
fEnforcePMColor == fp.fEnforcePMColor;
}
void GrArithmeticFP::onComputeInvariantOutput(GrInvariantOutput* inout) const {
// TODO: optimize this
inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
}
///////////////////////////////////////////////////////////////////////////////
sk_sp<GrFragmentProcessor> GrArithmeticFP::TestCreate(GrProcessorTestData* d) {
float k1 = d->fRandom->nextF();
float k2 = d->fRandom->nextF();
float k3 = d->fRandom->nextF();
float k4 = d->fRandom->nextF();
bool enforcePMColor = d->fRandom->nextBool();
sk_sp<GrFragmentProcessor> dst(GrProcessorUnitTest::MakeChildFP(d));
return GrArithmeticFP::Make(k1, k2, k3, k4, enforcePMColor, std::move(dst));
}
GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrArithmeticFP);
///////////////////////////////////////////////////////////////////////////////
// Xfer Processor
///////////////////////////////////////////////////////////////////////////////
class ArithmeticXP : public GrXferProcessor {
public:
ArithmeticXP(const DstTexture*, bool hasMixedSamples,
float k1, float k2, float k3, float k4, bool enforcePMColor);
const char* name() const override { return "Arithmetic"; }
GrGLSLXferProcessor* createGLSLInstance() const override;
float k1() const { return fK1; }
float k2() const { return fK2; }
float k3() const { return fK3; }
float k4() const { return fK4; }
bool enforcePMColor() const { return fEnforcePMColor; }
private:
GrXferProcessor::OptFlags onGetOptimizations(const GrPipelineOptimizations& optimizations,
bool doesStencilWrite,
GrColor* overrideColor,
const GrCaps& caps) const override;
void onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override;
bool onIsEqual(const GrXferProcessor& xpBase) const override {
const ArithmeticXP& xp = xpBase.cast<ArithmeticXP>();
if (fK1 != xp.fK1 ||
fK2 != xp.fK2 ||
fK3 != xp.fK3 ||
fK4 != xp.fK4 ||
fEnforcePMColor != xp.fEnforcePMColor) {
return false;
}
return true;
}
float fK1, fK2, fK3, fK4;
bool fEnforcePMColor;
typedef GrXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class GLArithmeticXP : public GrGLSLXferProcessor {
public:
GLArithmeticXP(const ArithmeticXP& arithmeticXP)
: fEnforcePMColor(arithmeticXP.enforcePMColor()) {
}
~GLArithmeticXP() override {}
static void GenKey(const GrProcessor& processor, const GrShaderCaps& caps,
GrProcessorKeyBuilder* b) {
const ArithmeticXP& arith = processor.cast<ArithmeticXP>();
uint32_t key = arith.enforcePMColor() ? 1 : 0;
b->add32(key);
}
private:
void emitBlendCodeForDstRead(GrGLSLXPFragmentBuilder* fragBuilder,
GrGLSLUniformHandler* uniformHandler,
const char* srcColor,
const char* srcCoverage,
const char* dstColor,
const char* outColor,
const char* outColorSecondary,
const GrXferProcessor& proc) override {
fKUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
kVec4f_GrSLType, kDefault_GrSLPrecision,
"k");
const char* kUni = uniformHandler->getUniformCStr(fKUni);
add_arithmetic_code(fragBuilder, srcColor, dstColor, outColor, kUni, fEnforcePMColor);
// Apply coverage.
INHERITED::DefaultCoverageModulation(fragBuilder, srcCoverage, dstColor, outColor,
outColorSecondary, proc);
}
void onSetData(const GrGLSLProgramDataManager& pdman,
const GrXferProcessor& processor) override {
const ArithmeticXP& arith = processor.cast<ArithmeticXP>();
pdman.set4f(fKUni, arith.k1(), arith.k2(), arith.k3(), arith.k4());
fEnforcePMColor = arith.enforcePMColor();
}
GrGLSLProgramDataManager::UniformHandle fKUni;
bool fEnforcePMColor;
typedef GrGLSLXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
ArithmeticXP::ArithmeticXP(const DstTexture* dstTexture, bool hasMixedSamples,
float k1, float k2, float k3, float k4, bool enforcePMColor)
: INHERITED(dstTexture, true, hasMixedSamples)
, fK1(k1)
, fK2(k2)
, fK3(k3)
, fK4(k4)
, fEnforcePMColor(enforcePMColor) {
this->initClassID<ArithmeticXP>();
}
void ArithmeticXP::onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const {
GLArithmeticXP::GenKey(*this, caps, b);
}
GrGLSLXferProcessor* ArithmeticXP::createGLSLInstance() const { return new GLArithmeticXP(*this); }
GrXferProcessor::OptFlags ArithmeticXP::onGetOptimizations(
const GrPipelineOptimizations& optimizations,
bool doesStencilWrite,
GrColor* overrideColor,
const GrCaps& caps) const {
return GrXferProcessor::kNone_OptFlags;
}
///////////////////////////////////////////////////////////////////////////////
GrArithmeticXPFactory::GrArithmeticXPFactory(float k1, float k2, float k3, float k4,
bool enforcePMColor)
: fK1(k1), fK2(k2), fK3(k3), fK4(k4), fEnforcePMColor(enforcePMColor) {
this->initClassID<GrArithmeticXPFactory>();
}
GrXferProcessor*
GrArithmeticXPFactory::onCreateXferProcessor(const GrCaps& caps,
const GrPipelineOptimizations& optimizations,
bool hasMixedSamples,
const DstTexture* dstTexture) const {
return new ArithmeticXP(dstTexture, hasMixedSamples, fK1, fK2, fK3, fK4, fEnforcePMColor);
}
void GrArithmeticXPFactory::getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
InvariantBlendedColor* blendedColor) const {
blendedColor->fWillBlendWithDst = true;
// TODO: We could try to optimize this more. For example if fK1 and fK3 are zero, then we won't
// be blending the color with dst at all so we can know what the output color is (up to the
// valid color components passed in).
blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
}
GR_DEFINE_XP_FACTORY_TEST(GrArithmeticXPFactory);
sk_sp<GrXPFactory> GrArithmeticXPFactory::TestCreate(GrProcessorTestData* d) {
float k1 = d->fRandom->nextF();
float k2 = d->fRandom->nextF();
float k3 = d->fRandom->nextF();
float k4 = d->fRandom->nextF();
bool enforcePMColor = d->fRandom->nextBool();
return GrArithmeticXPFactory::Make(k1, k2, k3, k4, enforcePMColor);
}
#endif