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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 "SkArenaAlloc.h"
#include "SkColorFilterShader.h"
#include "SkColorSpaceXformer.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkShader.h"
#include "SkString.h"
#if SK_SUPPORT_GPU
#include "GrFragmentProcessor.h"
#endif
SkColorFilterShader::SkColorFilterShader(sk_sp<SkShader> shader, sk_sp<SkColorFilter> filter)
: fShader(std::move(shader))
, fFilter(std::move(filter))
{
SkASSERT(fShader);
SkASSERT(fFilter);
}
sk_sp<SkFlattenable> SkColorFilterShader::CreateProc(SkReadBuffer& buffer) {
auto shader = buffer.readShader();
auto filter = buffer.readColorFilter();
if (!shader || !filter) {
return nullptr;
}
return sk_make_sp<SkColorFilterShader>(shader, filter);
}
void SkColorFilterShader::flatten(SkWriteBuffer& buffer) const {
buffer.writeFlattenable(fShader.get());
buffer.writeFlattenable(fFilter.get());
}
bool SkColorFilterShader::onAppendStages(const StageRec& rec) const {
if (!as_SB(fShader)->appendStages(rec)) {
return false;
}
fFilter->appendStages(rec.fPipeline, rec.fDstCS, rec.fAlloc, fShader->isOpaque());
return true;
}
sk_sp<SkShader> SkColorFilterShader::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
return xformer->apply(fShader.get())->makeWithColorFilter(xformer->apply(fFilter.get()));
}
#if SK_SUPPORT_GPU
/////////////////////////////////////////////////////////////////////
std::unique_ptr<GrFragmentProcessor> SkColorFilterShader::asFragmentProcessor(
const GrFPArgs& args) const {
auto fp1 = as_SB(fShader)->asFragmentProcessor(args);
if (!fp1) {
return nullptr;
}
auto fp2 = fFilter->asFragmentProcessor(args.fContext, *args.fDstColorSpaceInfo);
if (!fp2) {
return fp1;
}
std::unique_ptr<GrFragmentProcessor> fpSeries[] = { std::move(fp1), std::move(fp2) };
return GrFragmentProcessor::RunInSeries(fpSeries, 2);
}
#endif
///////////////////////////////////////////////////////////////////////////////////////////////////
sk_sp<SkShader> SkShader::makeWithColorFilter(sk_sp<SkColorFilter> filter) const {
SkShader* base = const_cast<SkShader*>(this);
if (!filter) {
return sk_ref_sp(base);
}
return sk_make_sp<SkColorFilterShader>(sk_ref_sp(base), filter);
}
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