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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 "GrGLSLFragmentProcessor.h"
#include "GrFragmentProcessor.h"
#include "GrProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLUniformHandler.h"
void GrGLSLFragmentProcessor::setData(const GrGLSLProgramDataManager& pdman,
const GrFragmentProcessor& processor) {
this->onSetData(pdman, processor);
SkASSERT(fChildProcessors.count() == processor.numChildProcessors());
for (int i = 0; i < fChildProcessors.count(); ++i) {
fChildProcessors[i]->setData(pdman, processor.childProcessor(i));
}
}
void GrGLSLFragmentProcessor::emitChild(int childIndex, const char* inputColor, EmitArgs& args) {
this->internalEmitChild(childIndex, inputColor, args.fOutputColor, args);
}
void GrGLSLFragmentProcessor::emitChild(int childIndex, const char* inputColor,
SkString* outputColor, EmitArgs& args) {
SkASSERT(outputColor);
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
outputColor->append(fragBuilder->getMangleString());
fragBuilder->codeAppendf("half4 %s;", outputColor->c_str());
this->internalEmitChild(childIndex, inputColor, outputColor->c_str(), args);
}
void GrGLSLFragmentProcessor::internalEmitChild(int childIndex, const char* inputColor,
const char* outputColor, EmitArgs& args) {
SkASSERT(inputColor);
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
fragBuilder->onBeforeChildProcEmitCode(); // call first so mangleString is updated
const GrFragmentProcessor& childProc = args.fFp.childProcessor(childIndex);
// emit the code for the child in its own scope
fragBuilder->codeAppend("{\n");
fragBuilder->codeAppendf("// Child Index %d (mangle: %s): %s\n", childIndex,
fragBuilder->getMangleString().c_str(), childProc.name());
TransformedCoordVars coordVars = args.fTransformedCoords.childInputs(childIndex);
TextureSamplers textureSamplers = args.fTexSamplers.childInputs(childIndex);
TexelBuffers texelBuffers = args.fTexelBuffers.childInputs(childIndex);
EmitArgs childArgs(fragBuilder,
args.fUniformHandler,
args.fShaderCaps,
childProc,
outputColor,
inputColor,
coordVars,
textureSamplers,
texelBuffers);
this->childProcessor(childIndex)->emitCode(childArgs);
fragBuilder->codeAppend("}\n");
fragBuilder->onAfterChildProcEmitCode();
}
//////////////////////////////////////////////////////////////////////////////
GrGLSLFragmentProcessor* GrGLSLFragmentProcessor::Iter::next() {
if (fFPStack.empty()) {
return nullptr;
}
GrGLSLFragmentProcessor* back = fFPStack.back();
fFPStack.pop_back();
for (int i = back->numChildProcessors() - 1; i >= 0; --i) {
fFPStack.push_back(back->childProcessor(i));
}
return back;
}
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