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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 "GrGLLegacyNvprProgramBuilder.h"
#include "../GrGpuGL.h"
GrGLLegacyNvprProgramBuilder::GrGLLegacyNvprProgramBuilder(GrGpuGL* gpu,
const GrOptDrawState& optState,
const GrGLProgramDesc& desc)
: INHERITED(gpu, optState, desc)
, fTexCoordSetCnt(0) {
SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fColorInput);
SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fCoverageInput);
}
int GrGLLegacyNvprProgramBuilder::addTexCoordSets(int count) {
int firstFreeCoordSet = fTexCoordSetCnt;
fTexCoordSetCnt += count;
SkASSERT(gpu()->glCaps().maxFixedFunctionTextureCoords() >= fTexCoordSetCnt);
return firstFreeCoordSet;
}
void GrGLLegacyNvprProgramBuilder::emitTransforms(const GrProcessorStage& processorStage,
GrGLProcessor::TransformedCoordsArray* outCoords,
GrGLInstalledProcessors* installedProcessors) {
int numTransforms = processorStage.getProcessor()->numTransforms();
int texCoordIndex = this->addTexCoordSets(numTransforms);
SkTArray<GrGLInstalledProcessors::Transform, true>& transforms =
installedProcessors->addTransforms();
// Use the first uniform location as the texcoord index. This may seem a bit hacky but it
// allows us to use one program effects object for all of our programs which really simplifies
// the code overall
transforms.push_back_n(1);
transforms[0].fHandle = GrGLInstalledProcessors::ShaderVarHandle(texCoordIndex);
SkString name;
for (int t = 0; t < numTransforms; ++t) {
GrSLType type = processorStage.isPerspectiveCoordTransform(t, false) ? kVec3f_GrSLType :
kVec2f_GrSLType;
name.printf("%s(gl_TexCoord[%i])", GrGLSLTypeString(type), texCoordIndex++);
SkNEW_APPEND_TO_TARRAY(outCoords, GrGLProcessor::TransformedCoords, (name, type));
}
}
GrGLProgram* GrGLLegacyNvprProgramBuilder::createProgram(GrGLuint programID) {
return SkNEW_ARGS(GrGLLegacyNvprProgram, (fGpu, fDesc, fUniformHandles, programID, fUniforms,
fColorEffects, fCoverageEffects, fTexCoordSetCnt));
}
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