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/*
* Copyright 2023 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/effects/colorfilters/SkComposeColorFilter.h"
#include "include/core/SkRefCnt.h"
#include "include/private/base/SkAssert.h"
#include "src/core/SkReadBuffer.h"
#include "src/core/SkWriteBuffer.h"
#include "src/effects/colorfilters/SkColorFilterBase.h"
#include <utility>
struct SkStageRec;
SkComposeColorFilter::SkComposeColorFilter(sk_sp<SkColorFilter> outer, sk_sp<SkColorFilter> inner)
: fOuter(as_CFB_sp(std::move(outer))), fInner(as_CFB_sp(std::move(inner))) {
SkASSERT(fOuter && fInner);
}
bool SkComposeColorFilter::onIsAlphaUnchanged() const {
// Can only claim alphaunchanged support if both our proxys do.
return fOuter->isAlphaUnchanged() && fInner->isAlphaUnchanged();
}
bool SkComposeColorFilter::appendStages(const SkStageRec& rec, bool shaderIsOpaque) const {
bool innerIsOpaque = shaderIsOpaque;
if (!fInner->isAlphaUnchanged()) {
innerIsOpaque = false;
}
return fInner->appendStages(rec, shaderIsOpaque) && fOuter->appendStages(rec, innerIsOpaque);
}
void SkComposeColorFilter::flatten(SkWriteBuffer& buffer) const {
buffer.writeFlattenable(fOuter.get());
buffer.writeFlattenable(fInner.get());
}
sk_sp<SkFlattenable> SkComposeColorFilter::CreateProc(SkReadBuffer& buffer) {
sk_sp<SkColorFilter> outer(buffer.readColorFilter());
sk_sp<SkColorFilter> inner(buffer.readColorFilter());
return outer ? outer->makeComposed(std::move(inner)) : inner;
}
sk_sp<SkColorFilter> SkColorFilter::makeComposed(sk_sp<SkColorFilter> inner) const {
if (!inner) {
return sk_ref_sp(this);
}
return sk_sp<SkColorFilter>(new SkComposeColorFilter(sk_ref_sp(this), std::move(inner)));
}
void SkRegisterComposeColorFilterFlattenable() { SK_REGISTER_FLATTENABLE(SkComposeColorFilter); }