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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 SkResizeImageFilter_DEFINED
#define SkResizeImageFilter_DEFINED
#include "SkImageFilter.h"
#include "SkScalar.h"
#include "SkRect.h"
#include "SkPoint.h"
#include "SkPaint.h"
/*! \class SkResizeImageFilter
Resampling image filter. This filter draws its source image resampled using the given scale
values.
*/
class SK_API SkResizeImageFilter : public SkImageFilter {
public:
virtual ~SkResizeImageFilter();
/** Construct a (scaling-only) resampling image filter.
* @param sx The x scale parameter to apply when resizing.
* @param sy The y scale parameter to apply when resizing.
* @param filterLevel The quality of filtering to apply when scaling.
* @param input The input image filter. If NULL, the src bitmap
* passed to filterImage() is used instead.
*/
static SkResizeImageFilter* Create(SkScalar sx, SkScalar sy, SkPaint::FilterLevel filterLevel,
SkImageFilter* input = NULL) {
return SkNEW_ARGS(SkResizeImageFilter, (sx, sy, filterLevel, input));
}
virtual void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE;
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkResizeImageFilter)
protected:
SkResizeImageFilter(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;
virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
SkIRect* dst) const SK_OVERRIDE;
#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
public:
#endif
SkResizeImageFilter(SkScalar sx, SkScalar sy, SkPaint::FilterLevel filterLevel,
SkImageFilter* input = NULL);
private:
SkScalar fSx, fSy;
SkPaint::FilterLevel fFilterLevel;
typedef SkImageFilter INHERITED;
};
#endif
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