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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkNormalFlatSource.h"
#include "SkArenaAlloc.h"
#include "SkNormalSource.h"
#include "SkPoint3.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#if SK_SUPPORT_GPU
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
class NormalFlatFP : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make() {
return std::unique_ptr<GrFragmentProcessor>(new NormalFlatFP());
}
const char* name() const override { return "NormalFlatFP"; }
std::unique_ptr<GrFragmentProcessor> clone() const override { return Make(); }
private:
class GLSLNormalFlatFP : public GrGLSLFragmentProcessor {
public:
GLSLNormalFlatFP() {}
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
fragBuilder->codeAppendf("%s = float4(0, 0, 1, 0);", args.fOutputColor);
}
private:
void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override {}
};
NormalFlatFP()
: INHERITED(kFlatNormalsFP_ClassID, kConstantOutputForConstantInput_OptimizationFlag) {
}
void onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override {}
GrColor4f constantOutputForConstantInput(GrColor4f) const override {
return GrColor4f(0, 0, 1, 0);
}
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { return new GLSLNormalFlatFP; }
bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
typedef GrFragmentProcessor INHERITED;
};
std::unique_ptr<GrFragmentProcessor> SkNormalFlatSourceImpl::asFragmentProcessor(
const GrFPArgs&) const {
return NormalFlatFP::Make();
}
#endif // SK_SUPPORT_GPU
////////////////////////////////////////////////////////////////////////////
SkNormalFlatSourceImpl::Provider::Provider() {}
SkNormalFlatSourceImpl::Provider::~Provider() {}
SkNormalSource::Provider* SkNormalFlatSourceImpl::asProvider(const SkShaderBase::ContextRec &rec,
SkArenaAlloc *alloc) const {
return alloc->make<Provider>();
}
void SkNormalFlatSourceImpl::Provider::fillScanLine(int x, int y, SkPoint3 output[],
int count) const {
for (int i = 0; i < count; i++) {
output[i] = {0.0f, 0.0f, 1.0f};
}
}
////////////////////////////////////////////////////////////////////////////////
sk_sp<SkFlattenable> SkNormalFlatSourceImpl::CreateProc(SkReadBuffer& buf) {
return sk_make_sp<SkNormalFlatSourceImpl>();
}
void SkNormalFlatSourceImpl::flatten(SkWriteBuffer& buf) const {
this->INHERITED::flatten(buf);
}
////////////////////////////////////////////////////////////////////////////
sk_sp<SkNormalSource> SkNormalSource::MakeFlat() {
return sk_make_sp<SkNormalFlatSourceImpl>();
}
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