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 SkMergeImageFilter_DEFINED
9#define SkMergeImageFilter_DEFINED
10
11#include "SkImageFilter.h"
12
13#include "SkXfermode.h"
14
15class SK_API SkMergeImageFilter : public SkImageFilter {
16public:
17    virtual ~SkMergeImageFilter();
18
19    static SkImageFilter* Create(SkImageFilter* first, SkImageFilter* second,
20                                 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode,
21                                 const CropRect* cropRect = NULL) {
22        SkImageFilter* inputs[2] = { first, second };
23        SkXfermode::Mode modes[2] = { mode, mode };
24        return new SkMergeImageFilter(inputs, 2, modes, cropRect);
25    }
26
27    static SkImageFilter* Create(SkImageFilter* filters[], int count,
28                                 const SkXfermode::Mode modes[] = NULL,
29                                const CropRect* cropRect = NULL) {
30        return new SkMergeImageFilter(filters, count, modes, cropRect);
31    }
32
33    SK_TO_STRING_OVERRIDE()
34    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMergeImageFilter)
35
36protected:
37    void flatten(SkWriteBuffer&) const override;
38    bool onFilterImageDeprecated(Proxy*, const SkBitmap& src, const Context&, SkBitmap* result,
39                                 SkIPoint* loc) const override;
40
41private:
42    SkMergeImageFilter(SkImageFilter* filters[], int count, const SkXfermode::Mode modes[],
43                       const CropRect* cropRect);
44
45    uint8_t*    fModes; // SkXfermode::Mode
46
47    // private storage, to avoid dynamically allocating storage for our copy
48    // of the modes (unless the count is so large we can't fit).
49    intptr_t    fStorage[16];
50
51    void initAllocModes();
52    void initModes(const SkXfermode::Mode []);
53
54    typedef SkImageFilter INHERITED;
55};
56
57#endif
58