Upstream version 7.36.149.0
[platform/framework/web/crosswalk.git] / src / third_party / skia / include / effects / SkXfermodeImageFilter.h
1 /*
2  * Copyright 2013 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 SkXfermodeImageFilter_DEFINED
9 #define SkXfermodeImageFilter_DEFINED
10
11 #include "SkImageFilter.h"
12
13 class SkBitmap;
14 class SkXfermode;
15
16 class SK_API SkXfermodeImageFilter : public SkImageFilter {
17     /**
18      * This filter takes an xfermode, and uses it to composite the foreground
19      * over the background.  If foreground or background is NULL, the input
20      * bitmap (src) is used instead.
21       */
22
23 public:
24     virtual ~SkXfermodeImageFilter();
25
26     static SkXfermodeImageFilter* Create(SkXfermode* mode, SkImageFilter* background,
27                                          SkImageFilter* foreground = NULL,
28                                          const CropRect* cropRect = NULL) {
29         return SkNEW_ARGS(SkXfermodeImageFilter, (mode, background, foreground, cropRect));
30     }
31
32     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter)
33
34     virtual bool onFilterImage(Proxy* proxy,
35                                const SkBitmap& src,
36                                const Context& ctx,
37                                SkBitmap* dst,
38                                SkIPoint* offset) const SK_OVERRIDE;
39 #if SK_SUPPORT_GPU
40     virtual bool canFilterImageGPU() const SK_OVERRIDE;
41     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
42                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
43 #endif
44
45 protected:
46     explicit SkXfermodeImageFilter(SkReadBuffer& buffer);
47     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
48
49 #ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
50 public:
51 #endif
52     SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* background,
53                           SkImageFilter* foreground = NULL, const CropRect* cropRect = NULL);
54
55 private:
56     SkXfermode* fMode;
57     typedef SkImageFilter INHERITED;
58 };
59
60 #endif