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/*
* Copyright 2013 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 SkXfermodeImageFilter_DEFINED
#define SkXfermodeImageFilter_DEFINED
#include "SkImageFilter.h"
class SkBitmap;
class SkXfermode;
class SK_API SkXfermodeImageFilter : public SkImageFilter {
/**
* This filter takes an xfermode, and uses it to composite the foreground
* over the background. If foreground or background is NULL, the input
* bitmap (src) is used instead.
*/
public:
SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* background,
SkImageFilter* foreground = NULL, const CropRect* cropRect = NULL);
virtual ~SkXfermodeImageFilter();
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter)
virtual bool onFilterImage(Proxy* proxy,
const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* dst,
SkIPoint* offset) SK_OVERRIDE;
#if SK_SUPPORT_GPU
virtual bool canFilterImageGPU() const SK_OVERRIDE { return !cropRectIsSet(); }
virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
SkBitmap* result, SkIPoint* offset) SK_OVERRIDE;
#endif
protected:
explicit SkXfermodeImageFilter(SkFlattenableReadBuffer& buffer);
virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
private:
SkXfermode* fMode;
typedef SkImageFilter INHERITED;
};
#endif
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