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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkColorSpaceXformer.h"
#include "SkImageFilterPriv.h"
#include "SkLocalMatrixImageFilter.h"
#include "SkReadBuffer.h"
#include "SkSpecialImage.h"
#include "SkString.h"
sk_sp<SkImageFilter> SkLocalMatrixImageFilter::Make(const SkMatrix& localM,
sk_sp<SkImageFilter> input) {
if (!input) {
return nullptr;
}
if (localM.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
return nullptr;
}
if (localM.isIdentity()) {
return input;
}
return sk_sp<SkImageFilter>(new SkLocalMatrixImageFilter(localM, input));
}
SkLocalMatrixImageFilter::SkLocalMatrixImageFilter(const SkMatrix& localM,
sk_sp<SkImageFilter> input)
: INHERITED(&input, 1, nullptr)
, fLocalM(localM) {
}
sk_sp<SkFlattenable> SkLocalMatrixImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
SkMatrix lm;
buffer.readMatrix(&lm);
return SkLocalMatrixImageFilter::Make(lm, common.getInput(0));
}
void SkLocalMatrixImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeMatrix(fLocalM);
}
sk_sp<SkSpecialImage> SkLocalMatrixImageFilter::onFilterImage(SkSpecialImage* source,
const Context& ctx,
SkIPoint* offset) const {
Context localCtx(SkMatrix::Concat(ctx.ctm(), fLocalM), ctx.clipBounds(), ctx.cache(),
ctx.outputProperties());
return this->filterInput(0, source, localCtx, offset);
}
SkIRect SkLocalMatrixImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
MapDirection dir, const SkIRect* inputRect) const {
return this->getInput(0)->filterBounds(src, SkMatrix::Concat(ctm, fLocalM), dir, inputRect);
}
sk_sp<SkImageFilter> SkLocalMatrixImageFilter::onMakeColorSpace(SkColorSpaceXformer* xformer)
const {
SkASSERT(1 == this->countInputs() && this->getInput(0));
auto input = xformer->apply(this->getInput(0));
if (input.get() != this->getInput(0)) {
return SkLocalMatrixImageFilter::Make(fLocalM, std::move(input));
}
return this->refMe();
}
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