SkOffsetImageFilter.h revision 4cb543d6057b692e1099e9f115155f0bf323a0c8 
1/*
2 * Copyright 2012 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkOffsetImageFilter_DEFINED
9#define SkOffsetImageFilter_DEFINED
10
11#include "SkImageFilter.h"
12#include "SkPoint.h"
13
14class SK_API SkOffsetImageFilter : public SkImageFilter {
15    typedef SkImageFilter INHERITED;
16
17public:
18    static SkOffsetImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
19                                       const CropRect* cropRect = NULL) {
20        return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect));
21    }
22    virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
23    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
24
25protected:
26    SkOffsetImageFilter(SkReadBuffer& buffer);
27    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
28
29    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
30                               SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
31    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) const SK_OVERRIDE;
32
33#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
34public:
35#endif
36    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
37                        const CropRect* cropRect = NULL);
38
39private:
40    SkVector fOffset;
41};
42
43#endif
44