/*
* 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 "GrFragmentProcessor.h"
#include "GrCoordTransform.h"
#include "GrPipeline.h"
#include "GrProcessorAnalysis.h"
#include "effects/GrConstColorProcessor.h"
#include "effects/GrPremulInputFragmentProcessor.h"
#include "effects/GrXfermodeFragmentProcessor.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLProgramDataManager.h"
#include "glsl/GrGLSLUniformHandler.h"
bool GrFragmentProcessor::isEqual(const GrFragmentProcessor& that) const {
if (this->classID() != that.classID()) {
return false;
}
if (this->numTextureSamplers() != that.numTextureSamplers()) {
return false;
}
for (int i = 0; i < this->numTextureSamplers(); ++i) {
if (this->textureSampler(i) != that.textureSampler(i)) {
return false;
}
}
if (!this->hasSameTransforms(that)) {
return false;
}
if (!this->onIsEqual(that)) {
return false;
}
if (this->numChildProcessors() != that.numChildProcessors()) {
return false;
}
for (int i = 0; i < this->numChildProcessors(); ++i) {
if (!this->childProcessor(i).isEqual(that.childProcessor(i))) {
return false;
}
}
return true;
}
void GrFragmentProcessor::visitProxies(const std::function<void(GrSurfaceProxy*)>& func) {
GrFragmentProcessor::TextureAccessIter iter(this);
while (const TextureSampler* sampler = iter.next()) {
func(sampler->proxy());
}
}
GrGLSLFragmentProcessor* GrFragmentProcessor::createGLSLInstance() const {
GrGLSLFragmentProcessor* glFragProc = this->onCreateGLSLInstance();
glFragProc->fChildProcessors.push_back_n(fChildProcessors.count());
for (int i = 0; i < fChildProcessors.count(); ++i) {
glFragProc->fChildProcessors[i] = fChildProcessors[i]->createGLSLInstance();
}
return glFragProc;
}
const GrFragmentProcessor::TextureSampler& GrFragmentProcessor::textureSampler(int i) const {
SkASSERT(i >= 0 && i < fTextureSamplerCnt);
return this->onTextureSampler(i);
}
void GrFragmentProcessor::addCoordTransform(const GrCoordTransform* transform) {
fCoordTransforms.push_back(transform);
fFlags |= kUsesLocalCoords_Flag;
SkDEBUGCODE(transform->setInProcessor();)
}
bool GrFragmentProcessor::instantiate(GrResourceProvider* resourceProvider) const {
for (int i = 0; i < fTextureSamplerCnt; ++i) {
if (!this->textureSampler(i).instantiate(resourceProvider)) {
return false;
}
}
for (int i = 0; i < this->numChildProcessors(); ++i) {
if (!this->childProcessor(i).instantiate(resourceProvider)) {
return false;
}
}
return true;
}
void GrFragmentProcessor::markPendingExecution() const {
for (int i = 0; i < fTextureSamplerCnt; ++i) {
auto* ref = this->textureSampler(i).proxyRef();
ref->markPendingIO();
ref->removeRef();
}
for (int i = 0; i < this->numChildProcessors(); ++i) {
this->childProcessor(i).markPendingExecution();
}
}
int GrFragmentProcessor::registerChildProcessor(std::unique_ptr<GrFragmentProcessor> child) {
if (child->usesLocalCoords()) {
fFlags |= kUsesLocalCoords_Flag;
}
int index = fChildProcessors.count();
fChildProcessors.push_back(std::move(child));
return index;
}
bool GrFragmentProcessor::hasSameTransforms(const GrFragmentProcessor& that) const {
if (this->numCoordTransforms() != that.numCoordTransforms()) {
return false;
}
int count = this->numCoordTransforms();
for (int i = 0; i < count; ++i) {
if (!this->coordTransform(i).hasSameEffectAs(that.coordTransform(i))) {
return false;
}
}
return true;
}
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::MulChildByInputAlpha(
std::unique_ptr<GrFragmentProcessor> fp) {
if (!fp) {
return nullptr;
}
return GrXfermodeFragmentProcessor::MakeFromDstProcessor(std::move(fp), SkBlendMode::kDstIn);
}
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::MulInputByChildAlpha(
std::unique_ptr<GrFragmentProcessor> fp) {
if (!fp) {
return nullptr;
}
return GrXfermodeFragmentProcessor::MakeFromDstProcessor(std::move(fp), SkBlendMode::kSrcIn);
}
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::PremulInput(
std::unique_ptr<GrFragmentProcessor> fp) {
if (!fp) {
return nullptr;
}
std::unique_ptr<GrFragmentProcessor> fpPipeline[] = { GrPremulInputFragmentProcessor::Make(),
std::move(fp) };
return GrFragmentProcessor::RunInSeries(fpPipeline, 2);
}
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::SwizzleOutput(
std::unique_ptr<GrFragmentProcessor> fp, const GrSwizzle& swizzle) {
class SwizzleFragmentProcessor : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(const GrSwizzle& swizzle) {
return std::unique_ptr<GrFragmentProcessor>(new SwizzleFragmentProcessor(swizzle));
}
const char* name() const override { return "Swizzle"; }
const GrSwizzle& swizzle() const { return fSwizzle; }
std::unique_ptr<GrFragmentProcessor> clone() const override { return Make(fSwizzle); }
private:
SwizzleFragmentProcessor(const GrSwizzle& swizzle)
: INHERITED(kSwizzleFragmentProcessor_ClassID, kAll_OptimizationFlags)
, fSwizzle(swizzle) {}
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
class GLFP : public GrGLSLFragmentProcessor {
public:
void emitCode(EmitArgs& args) override {
const SwizzleFragmentProcessor& sfp = args.fFp.cast<SwizzleFragmentProcessor>();
const GrSwizzle& swizzle = sfp.swizzle();
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
fragBuilder->codeAppendf("%s = %s.%s;",
args.fOutputColor, args.fInputColor, swizzle.c_str());
}
};
return new GLFP;
}
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override {
b->add32(fSwizzle.asKey());
}
bool onIsEqual(const GrFragmentProcessor& other) const override {
const SwizzleFragmentProcessor& sfp = other.cast<SwizzleFragmentProcessor>();
return fSwizzle == sfp.fSwizzle;
}
SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& input) const override {
return fSwizzle.applyTo(input);
}
GrSwizzle fSwizzle;
typedef GrFragmentProcessor INHERITED;
};
if (!fp) {
return nullptr;
}
if (GrSwizzle::RGBA() == swizzle) {
return fp;
}
std::unique_ptr<GrFragmentProcessor> fpPipeline[] = { std::move(fp),
SwizzleFragmentProcessor::Make(swizzle) };
return GrFragmentProcessor::RunInSeries(fpPipeline, 2);
}
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::MakeInputPremulAndMulByOutput(
std::unique_ptr<GrFragmentProcessor> fp) {
class PremulFragmentProcessor : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(
std::unique_ptr<GrFragmentProcessor> processor) {
return std::unique_ptr<GrFragmentProcessor>(
new PremulFragmentProcessor(std::move(processor)));
}
const char* name() const override { return "Premultiply"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
return Make(this->childProcessor(0).clone());
}
private:
PremulFragmentProcessor(std::unique_ptr<GrFragmentProcessor> processor)
: INHERITED(kPremulFragmentProcessor_ClassID, OptFlags(processor.get())) {
this->registerChildProcessor(std::move(processor));
}
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
class GLFP : public GrGLSLFragmentProcessor {
public:
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
this->emitChild(0, args);
fragBuilder->codeAppendf("%s.rgb *= %s.rgb;", args.fOutputColor,
args.fInputColor);
fragBuilder->codeAppendf("%s *= %s.a;", args.fOutputColor, args.fInputColor);
}
};
return new GLFP;
}
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}
bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
static OptimizationFlags OptFlags(const GrFragmentProcessor* inner) {
OptimizationFlags flags = kNone_OptimizationFlags;
if (inner->preservesOpaqueInput()) {
flags |= kPreservesOpaqueInput_OptimizationFlag;
}
if (inner->hasConstantOutputForConstantInput()) {
flags |= kConstantOutputForConstantInput_OptimizationFlag;
}
return flags;
}
SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& input) const override {
SkPMColor4f childColor = ConstantOutputForConstantInput(this->childProcessor(0),
SK_PMColor4fWHITE);
SkPMColor4f premulInput = SkColor4f{ input.fR, input.fG, input.fB, input.fA }.premul();
return premulInput * childColor;
}
typedef GrFragmentProcessor INHERITED;
};
if (!fp) {
return nullptr;
}
return PremulFragmentProcessor::Make(std::move(fp));
}
//////////////////////////////////////////////////////////////////////////////
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::OverrideInput(
std::unique_ptr<GrFragmentProcessor> fp, const SkPMColor4f& color) {
class ReplaceInputFragmentProcessor : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> child,
const SkPMColor4f& color) {
return std::unique_ptr<GrFragmentProcessor>(
new ReplaceInputFragmentProcessor(std::move(child), color));
}
const char* name() const override { return "Replace Color"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
return Make(this->childProcessor(0).clone(), fColor);
}
private:
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
class GLFP : public GrGLSLFragmentProcessor {
public:
GLFP() : fHaveSetColor(false) {}
void emitCode(EmitArgs& args) override {
const char* colorName;
fColorUni = args.fUniformHandler->addUniform(kFragment_GrShaderFlag,
kHalf4_GrSLType,
"Color", &colorName);
this->emitChild(0, colorName, args);
}
private:
void onSetData(const GrGLSLProgramDataManager& pdman,
const GrFragmentProcessor& fp) override {
SkPMColor4f color = fp.cast<ReplaceInputFragmentProcessor>().fColor;
if (!fHaveSetColor || color != fPreviousColor) {
pdman.set4fv(fColorUni, 1, color.vec());
fPreviousColor = color;
fHaveSetColor = true;
}
}
GrGLSLProgramDataManager::UniformHandle fColorUni;
bool fHaveSetColor;
SkPMColor4f fPreviousColor;
};
return new GLFP;
}
ReplaceInputFragmentProcessor(std::unique_ptr<GrFragmentProcessor> child,
const SkPMColor4f& color)
: INHERITED(kReplaceInputFragmentProcessor_ClassID, OptFlags(child.get(), color))
, fColor(color) {
this->registerChildProcessor(std::move(child));
}
static OptimizationFlags OptFlags(const GrFragmentProcessor* child,
const SkPMColor4f& color) {
OptimizationFlags childFlags = child->optimizationFlags();
OptimizationFlags flags = kNone_OptimizationFlags;
if (childFlags & kConstantOutputForConstantInput_OptimizationFlag) {
flags |= kConstantOutputForConstantInput_OptimizationFlag;
}
if ((childFlags & kPreservesOpaqueInput_OptimizationFlag) && color.isOpaque()) {
flags |= kPreservesOpaqueInput_OptimizationFlag;
}
return flags;
}
void onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override
{}
bool onIsEqual(const GrFragmentProcessor& that) const override {
return fColor == that.cast<ReplaceInputFragmentProcessor>().fColor;
}
SkPMColor4f constantOutputForConstantInput(const SkPMColor4f&) const override {
return ConstantOutputForConstantInput(this->childProcessor(0), fColor);
}
SkPMColor4f fColor;
typedef GrFragmentProcessor INHERITED;
};
if (!fp) {
return nullptr;
}
return ReplaceInputFragmentProcessor::Make(std::move(fp), color);
}
std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::RunInSeries(
std::unique_ptr<GrFragmentProcessor>* series, int cnt) {
class SeriesFragmentProcessor : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(
std::unique_ptr<GrFragmentProcessor>* children, int cnt) {
return std::unique_ptr<GrFragmentProcessor>(new SeriesFragmentProcessor(children, cnt));
}
const char* name() const override { return "Series"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
SkSTArray<4, std::unique_ptr<GrFragmentProcessor>> children(this->numChildProcessors());
for (int i = 0; i < this->numChildProcessors(); ++i) {
if (!children.push_back(this->childProcessor(i).clone())) {
return nullptr;
}
}
return Make(children.begin(), this->numChildProcessors());
}
private:
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
class GLFP : public GrGLSLFragmentProcessor {
public:
void emitCode(EmitArgs& args) override {
// First guy's input might be nil.
SkString temp("out0");
this->emitChild(0, args.fInputColor, &temp, args);
SkString input = temp;
for (int i = 1; i < this->numChildProcessors() - 1; ++i) {
temp.printf("out%d", i);
this->emitChild(i, input.c_str(), &temp, args);
input = temp;
}
// Last guy writes to our output variable.
this->emitChild(this->numChildProcessors() - 1, input.c_str(), args);
}
};
return new GLFP;
}
SeriesFragmentProcessor(std::unique_ptr<GrFragmentProcessor>* children, int cnt)
: INHERITED(kSeriesFragmentProcessor_ClassID, OptFlags(children, cnt)) {
SkASSERT(cnt > 1);
for (int i = 0; i < cnt; ++i) {
this->registerChildProcessor(std::move(children[i]));
}
}
static OptimizationFlags OptFlags(std::unique_ptr<GrFragmentProcessor>* children, int cnt) {
OptimizationFlags flags = kAll_OptimizationFlags;
for (int i = 0; i < cnt && flags != kNone_OptimizationFlags; ++i) {
flags &= children[i]->optimizationFlags();
}
return flags;
}
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}
bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& inColor) const override {
SkPMColor4f color = inColor;
int childCnt = this->numChildProcessors();
for (int i = 0; i < childCnt; ++i) {
color = ConstantOutputForConstantInput(this->childProcessor(i), color);
}
return color;
}
typedef GrFragmentProcessor INHERITED;
};
if (!cnt) {
return nullptr;
}
if (1 == cnt) {
return std::move(series[0]);
}
// Run the through the series, do the invariant output processing, and look for eliminations.
GrProcessorAnalysisColor inputColor;
inputColor.setToUnknown();
GrColorFragmentProcessorAnalysis info(inputColor, unique_ptr_address_as_pointer_address(series),
cnt);
SkTArray<std::unique_ptr<GrFragmentProcessor>> replacementSeries;
SkPMColor4f knownColor;
int leadingFPsToEliminate = info.initialProcessorsToEliminate(&knownColor);
if (leadingFPsToEliminate) {
std::unique_ptr<GrFragmentProcessor> colorFP(
GrConstColorProcessor::Make(knownColor, GrConstColorProcessor::InputMode::kIgnore));
if (leadingFPsToEliminate == cnt) {
return colorFP;
}
cnt = cnt - leadingFPsToEliminate + 1;
replacementSeries.reserve(cnt);
replacementSeries.emplace_back(std::move(colorFP));
for (int i = 0; i < cnt - 1; ++i) {
replacementSeries.emplace_back(std::move(series[leadingFPsToEliminate + i]));
}
series = replacementSeries.begin();
}
return SeriesFragmentProcessor::Make(series, cnt);
}
//////////////////////////////////////////////////////////////////////////////
GrFragmentProcessor::Iter::Iter(const GrPipeline& pipeline) {
for (int i = pipeline.numFragmentProcessors() - 1; i >= 0; --i) {
fFPStack.push_back(&pipeline.getFragmentProcessor(i));
}
}
GrFragmentProcessor::Iter::Iter(const GrPaint& paint) {
for (int i = paint.numCoverageFragmentProcessors() - 1; i >= 0; --i) {
fFPStack.push_back(paint.getCoverageFragmentProcessor(i));
}
for (int i = paint.numColorFragmentProcessors() - 1; i >= 0; --i) {
fFPStack.push_back(paint.getColorFragmentProcessor(i));
}
}
const GrFragmentProcessor* GrFragmentProcessor::Iter::next() {
if (fFPStack.empty()) {
return nullptr;
}
const GrFragmentProcessor* back = fFPStack.back();
fFPStack.pop_back();
for (int i = back->numChildProcessors() - 1; i >= 0; --i) {
fFPStack.push_back(&back->childProcessor(i));
}
return back;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
GrFragmentProcessor::TextureSampler::TextureSampler(sk_sp<GrTextureProxy> proxy,
const GrSamplerState& samplerState) {
this->reset(std::move(proxy), samplerState);
}
GrFragmentProcessor::TextureSampler::TextureSampler(sk_sp<GrTextureProxy> proxy,
GrSamplerState::Filter filterMode,
GrSamplerState::WrapMode wrapXAndY) {
this->reset(std::move(proxy), filterMode, wrapXAndY);
}
void GrFragmentProcessor::TextureSampler::reset(sk_sp<GrTextureProxy> proxy,
const GrSamplerState& samplerState) {
fProxyRef.setProxy(std::move(proxy), kRead_GrIOType);
fSamplerState = samplerState;
fSamplerState.setFilterMode(SkTMin(samplerState.filter(), this->proxy()->highestFilterMode()));
}
void GrFragmentProcessor::TextureSampler::reset(sk_sp<GrTextureProxy> proxy,
GrSamplerState::Filter filterMode,
GrSamplerState::WrapMode wrapXAndY) {
fProxyRef.setProxy(std::move(proxy), kRead_GrIOType);
filterMode = SkTMin(filterMode, this->proxy()->highestFilterMode());
fSamplerState = GrSamplerState(wrapXAndY, filterMode);
}