6343c4b575f13aed4cb9f43ce8e859af3850d726
[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     SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* background,
25                           SkImageFilter* foreground = NULL, const CropRect* cropRect = NULL);
26
27     virtual ~SkXfermodeImageFilter();
28
29     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter)
30
31     virtual bool onFilterImage(Proxy* proxy,
32                                const SkBitmap& src,
33                                const SkMatrix& ctm,
34                                SkBitmap* dst,
35                                SkIPoint* offset) SK_OVERRIDE;
36 #if SK_SUPPORT_GPU
37     virtual bool canFilterImageGPU() const SK_OVERRIDE { return !cropRectIsSet(); }
38     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
39                                 SkBitmap* result, SkIPoint* offset) SK_OVERRIDE;
40 #endif
41
42 protected:
43     explicit SkXfermodeImageFilter(SkFlattenableReadBuffer& buffer);
44     virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
45
46 private:
47     SkXfermode* fMode;
48     typedef SkImageFilter INHERITED;
49 };
50
51 #endif