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/*
* Copyright 2015 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkLocalMatrixImageFilter_DEFINED
#define SkLocalMatrixImageFilter_DEFINED
#include "SkFlattenable.h"
#include "SkImageFilter.h"
/**
* Wraps another imagefilter + matrix, such that using this filter will give the same result
* as using the wrapped filter with the matrix applied to its context.
*/
class SkLocalMatrixImageFilter : public SkImageFilter {
public:
static sk_sp<SkImageFilter> Make(const SkMatrix& localM, sk_sp<SkImageFilter> input);
Factory getFactory() const override { return CreateProc; }
protected:
void flatten(SkWriteBuffer&) const override;
sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
SkIPoint* offset) const override;
sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override;
SkIRect onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
MapDirection, const SkIRect* inputRect) const override;
private:
SkLocalMatrixImageFilter(const SkMatrix& localM, sk_sp<SkImageFilter> input);
static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&);
friend class SkFlattenable::PrivateInitializer;
SkMatrix fLocalM;
typedef SkImageFilter INHERITED;
};
#endif
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