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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 
14 class SK_API SkOffsetImageFilter : public SkImageFilter {
15 public:
16     static SkImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
17                                  const CropRect* cropRect = NULL) {
18         if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) {
19             return NULL;
20         }
21         return new SkOffsetImageFilter(dx, dy, input, cropRect);
22     }
23 
24     void computeFastBounds(const SkRect& src, SkRect* dst) const override;
25 
26     SK_TO_STRING_OVERRIDE()
27     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
28 
29 protected:
30     void flatten(SkWriteBuffer&) const override;
31     bool onFilterImageDeprecated(Proxy*, const SkBitmap& src, const Context&, SkBitmap* result,
32                                  SkIPoint* loc) const override;
33     void onFilterNodeBounds(const SkIRect&, const SkMatrix&, SkIRect*, MapDirection) const override;
34 
35 private:
36     SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect*);
37 
38     SkVector fOffset;
39 
40     typedef SkImageFilter INHERITED;
41 };
42 
43 #endif
44