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                                       uint32_t uniqueID = 0) {
21        if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) {
22            return NULL;
23        }
24        return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect, uniqueID));
25    }
26    virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
27    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
28
29protected:
30    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect* cropRect, uint32_t uniqueID);
31#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
32    explicit SkOffsetImageFilter(SkReadBuffer& buffer);
33#endif
34    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
35
36    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
37                               SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
38    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) const SK_OVERRIDE;
39
40private:
41    SkVector fOffset;
42};
43
44#endif
45