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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 SkBicubicImageFilter_DEFINED
#define SkBicubicImageFilter_DEFINED
#include "SkImageFilter.h"
#include "SkScalar.h"
#include "SkSize.h"
#include "SkPoint.h"
/*! \class SkBicubicImageFilter
Bicubic resampling image filter. This filter does a 16-tap bicubic
filter using the given matrix.
*/
class SK_API SkBicubicImageFilter : public SkImageFilter {
public:
virtual ~SkBicubicImageFilter();
static SkBicubicImageFilter* CreateMitchell(const SkSize& scale, SkImageFilter* input = NULL);
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBicubicImageFilter)
protected:
/** Construct a (scaling-only) bicubic resampling image filter.
@param scale How much to scale the image.
@param coefficients The 16 coefficients of the bicubic matrix.
@param input The input image filter. If NULL, the src bitmap
passed to filterImage() is used instead.
*/
SkBicubicImageFilter(const SkSize& scale, const SkScalar coefficients[16],
SkImageFilter* input = NULL);
SkBicubicImageFilter(SkReadBuffer& buffer);
virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
#if SK_SUPPORT_GPU
virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
#endif
private:
SkSize fScale;
SkScalar fCoefficients[16];
typedef SkImageFilter INHERITED;
};
#endif
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