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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 "GrGLNvprProgramBuilder.h"
#include "../GrGLGpu.h"
#define GL_CALL(X) GR_GL_CALL(this->gpu()->glInterface(), X)
#define GL_CALL_RET(R, X) GR_GL_CALL_RET(this->gpu()->glInterface(), R, X)
GrGLNvprProgramBuilder::GrGLNvprProgramBuilder(GrGLGpu* gpu,
const GrOptDrawState& optState)
: INHERITED(gpu, optState)
, fSeparableVaryingInfos(kVarsPerBlock) {
}
void GrGLNvprProgramBuilder::emitTransforms(const GrPendingFragmentStage& processorStage,
GrGLProcessor::TransformedCoordsArray* outCoords,
GrGLInstalledFragProc* ifp) {
const GrFragmentProcessor* effect = processorStage.processor();
int numTransforms = effect->numTransforms();
ifp->fTransforms.push_back_n(numTransforms);
for (int t = 0; t < numTransforms; t++) {
GrSLType varyingType =
processorStage.isPerspectiveCoordTransform(t) ?
kVec3f_GrSLType :
kVec2f_GrSLType;
const char* varyingName = "MatrixCoord";
SkString suffixedVaryingName;
if (0 != t) {
suffixedVaryingName.append(varyingName);
suffixedVaryingName.appendf("_%i", t);
varyingName = suffixedVaryingName.c_str();
}
GrGLVertToFrag v(varyingType);
ifp->fTransforms[t].fHandle = this->addSeparableVarying(varyingName, &v);
ifp->fTransforms[t].fType = varyingType;
SkNEW_APPEND_TO_TARRAY(outCoords, GrGLProcessor::TransformedCoords,
(SkString(v.fsIn()), varyingType));
}
}
GrGLInstalledFragProc::ShaderVarHandle
GrGLNvprProgramBuilder::addSeparableVarying(const char* name, GrGLVarying* v) {
this->addVarying(name, v);
SeparableVaryingInfo& varying = fSeparableVaryingInfos.push_back();
varying.fVariable = fFS.fInputs.back();
return GrGLInstalledFragProc::ShaderVarHandle(fSeparableVaryingInfos.count() - 1);
}
void GrGLNvprProgramBuilder::resolveSeparableVaryings(GrGLuint programId) {
int count = fSeparableVaryingInfos.count();
for (int i = 0; i < count; ++i) {
GrGLint location;
GL_CALL_RET(location,
GetProgramResourceLocation(programId,
GR_GL_FRAGMENT_INPUT,
fSeparableVaryingInfos[i].fVariable.c_str()));
fSeparableVaryingInfos[i].fLocation = location;
}
}
GrGLProgram* GrGLNvprProgramBuilder::createProgram(GrGLuint programID) {
// this is just for nvpr es, which has separable varyings that are plugged in after
// building
this->resolveSeparableVaryings(programID);
return SkNEW_ARGS(GrGLNvprProgram, (fGpu, fDesc, fUniformHandles, programID, fUniforms,
fGeometryProcessor,
fXferProcessor, fFragmentProcessors.get(),
fSeparableVaryingInfos));
}
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