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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGLPathProcessor.h"
#include "GrPathProcessor.h"
#include "GrGLGpu.h"
#include "GrGLPathRendering.h"
GrGLPathProcessor::GrGLPathProcessor(const GrPathProcessor&, const GrBatchTracker&)
: fColor(GrColor_ILLEGAL) {}
void GrGLPathProcessor::emitCode(EmitArgs& args) {
GrGLGPBuilder* pb = args.fPB;
GrGLFragmentBuilder* fs = args.fPB->getFragmentShaderBuilder();
const PathBatchTracker& local = args.fBT.cast<PathBatchTracker>();
// emit transforms
this->emitTransforms(args.fPB, args.fTransformsIn, args.fTransformsOut);
// Setup uniform color
if (kUniform_GrGPInput == local.fInputColorType) {
const char* stagedLocalVarName;
fColorUniform = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility,
kVec4f_GrSLType,
kDefault_GrSLPrecision,
"Color",
&stagedLocalVarName);
fs->codeAppendf("%s = %s;", args.fOutputColor, stagedLocalVarName);
}
// setup constant solid coverage
if (kAllOnes_GrGPInput == local.fInputCoverageType) {
fs->codeAppendf("%s = vec4(1);", args.fOutputCoverage);
}
}
void GrGLPathProcessor::GenKey(const GrPathProcessor&,
const GrBatchTracker& bt,
const GrGLSLCaps&,
GrProcessorKeyBuilder* b) {
const PathBatchTracker& local = bt.cast<PathBatchTracker>();
b->add32(local.fInputColorType | local.fInputCoverageType << 16);
}
void GrGLPathProcessor::setData(const GrGLProgramDataManager& pdman,
const GrPrimitiveProcessor& primProc,
const GrBatchTracker& bt) {
const PathBatchTracker& local = bt.cast<PathBatchTracker>();
if (kUniform_GrGPInput == local.fInputColorType && local.fColor != fColor) {
GrGLfloat c[4];
GrColorToRGBAFloat(local.fColor, c);
pdman.set4fv(fColorUniform, 1, c);
fColor = local.fColor;
}
}
void GrGLPathProcessor::emitTransforms(GrGLGPBuilder* pb, const TransformsIn& tin,
TransformsOut* tout) {
tout->push_back_n(tin.count());
fInstalledTransforms.push_back_n(tin.count());
for (int i = 0; i < tin.count(); i++) {
const ProcCoords& coordTransforms = tin[i];
fInstalledTransforms[i].push_back_n(coordTransforms.count());
for (int t = 0; t < coordTransforms.count(); t++) {
GrSLType varyingType =
coordTransforms[t]->getMatrix().hasPerspective() ? kVec3f_GrSLType :
kVec2f_GrSLType;
SkString strVaryingName("MatrixCoord");
strVaryingName.appendf("_%i_%i", i, t);
GrGLVertToFrag v(varyingType);
fInstalledTransforms[i][t].fHandle =
pb->addSeparableVarying(strVaryingName.c_str(), &v).toShaderBuilderIndex();
fInstalledTransforms[i][t].fType = varyingType;
SkNEW_APPEND_TO_TARRAY(&(*tout)[i], GrGLProcessor::TransformedCoords,
(SkString(v.fsIn()), varyingType));
}
}
}
void GrGLPathProcessor::setTransformData(
const GrPrimitiveProcessor& primProc,
const GrGLPathProgramDataManager& pdman,
int index,
const SkTArray<const GrCoordTransform*, true>& coordTransforms) {
const GrPathProcessor& pathProc = primProc.cast<GrPathProcessor>();
SkSTArray<2, Transform, true>& transforms = fInstalledTransforms[index];
int numTransforms = transforms.count();
for (int t = 0; t < numTransforms; ++t) {
SkASSERT(transforms[t].fHandle.isValid());
const SkMatrix& transform = GetTransformMatrix(pathProc.localMatrix(),
*coordTransforms[t]);
if (transforms[t].fCurrentValue.cheapEqualTo(transform)) {
continue;
}
transforms[t].fCurrentValue = transform;
SkASSERT(transforms[t].fType == kVec2f_GrSLType ||
transforms[t].fType == kVec3f_GrSLType);
unsigned components = transforms[t].fType == kVec2f_GrSLType ? 2 : 3;
pdman.setPathFragmentInputTransform(transforms[t].fHandle.handle(), components, transform);
}
}
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