Upstream version 9.38.198.0
[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         SkImageFilter* inputs[2] = { background, foreground };
30         return SkNEW_ARGS(SkXfermodeImageFilter, (mode, inputs, cropRect));
31     }
32
33     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter)
34
35     virtual bool onFilterImage(Proxy* proxy,
36                                const SkBitmap& src,
37                                const Context& ctx,
38                                SkBitmap* dst,
39                                SkIPoint* offset) const SK_OVERRIDE;
40 #if SK_SUPPORT_GPU
41     virtual bool canFilterImageGPU() const SK_OVERRIDE;
42     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
43                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
44 #endif
45
46 protected:
47     SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* inputs[2],
48                           const CropRect* cropRect);
49     explicit SkXfermodeImageFilter(SkReadBuffer& buffer);
50     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
51
52 private:
53     SkXfermode* fMode;
54     typedef SkImageFilter INHERITED;
55 };
56
57 #endif