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