1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "GrGLSLFragmentProcessor.h"
9 #include "GrFragmentProcessor.h"
10 #include "GrProcessor.h"
11 #include "glsl/GrGLSLFragmentShaderBuilder.h"
12 #include "glsl/GrGLSLUniformHandler.h"
13
setData(const GrGLSLProgramDataManager & pdman,const GrFragmentProcessor & processor)14 void GrGLSLFragmentProcessor::setData(const GrGLSLProgramDataManager& pdman,
15 const GrFragmentProcessor& processor) {
16 this->onSetData(pdman, processor);
17 SkASSERT(fChildProcessors.count() == processor.numChildProcessors());
18 for (int i = 0; i < fChildProcessors.count(); ++i) {
19 fChildProcessors[i]->setData(pdman, processor.childProcessor(i));
20 }
21 }
22
emitChild(int childIndex,const char * inputColor,EmitArgs & args)23 void GrGLSLFragmentProcessor::emitChild(int childIndex, const char* inputColor, EmitArgs& args) {
24 this->internalEmitChild(childIndex, inputColor, args.fOutputColor, args);
25 }
26
emitChild(int childIndex,const char * inputColor,SkString * outputColor,EmitArgs & args)27 void GrGLSLFragmentProcessor::emitChild(int childIndex, const char* inputColor,
28 SkString* outputColor, EmitArgs& args) {
29
30 SkASSERT(outputColor);
31 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
32 outputColor->append(fragBuilder->getMangleString());
33 fragBuilder->codeAppendf("vec4 %s;", outputColor->c_str());
34 this->internalEmitChild(childIndex, inputColor, outputColor->c_str(), args);
35 }
36
internalEmitChild(int childIndex,const char * inputColor,const char * outputColor,EmitArgs & args)37 void GrGLSLFragmentProcessor::internalEmitChild(int childIndex, const char* inputColor,
38 const char* outputColor, EmitArgs& args) {
39 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
40
41 fragBuilder->onBeforeChildProcEmitCode(); // call first so mangleString is updated
42
43 const GrFragmentProcessor& childProc = args.fFp.childProcessor(childIndex);
44
45 // emit the code for the child in its own scope
46 fragBuilder->codeAppend("{\n");
47 fragBuilder->codeAppendf("// Child Index %d (mangle: %s): %s\n", childIndex,
48 fragBuilder->getMangleString().c_str(), childProc.name());
49 TransformedCoordVars coordVars = args.fTransformedCoords.childInputs(childIndex);
50 TextureSamplers textureSamplers = args.fTexSamplers.childInputs(childIndex);
51 BufferSamplers bufferSamplers = args.fBufferSamplers.childInputs(childIndex);
52 ImageStorages imageStorages = args.fImageStorages.childInputs(childIndex);
53 EmitArgs childArgs(fragBuilder,
54 args.fUniformHandler,
55 args.fShaderCaps,
56 childProc,
57 outputColor,
58 inputColor,
59 coordVars,
60 textureSamplers,
61 bufferSamplers,
62 imageStorages,
63 args.fGpImplementsDistanceVector);
64 this->childProcessor(childIndex)->emitCode(childArgs);
65 fragBuilder->codeAppend("}\n");
66
67 fragBuilder->onAfterChildProcEmitCode();
68 }
69
70 //////////////////////////////////////////////////////////////////////////////
71
next()72 GrGLSLFragmentProcessor* GrGLSLFragmentProcessor::Iter::next() {
73 if (fFPStack.empty()) {
74 return nullptr;
75 }
76 GrGLSLFragmentProcessor* back = fFPStack.back();
77 fFPStack.pop_back();
78 for (int i = back->numChildProcessors() - 1; i >= 0; --i) {
79 fFPStack.push_back(back->childProcessor(i));
80 }
81 return back;
82 }
83