SkTestImageFilters.h revision 54924243c1b65b3ee6d8fa064b50a9b1bb2a19a5 
1
2#ifndef _SkTestImageFilters_h
3#define _SkTestImageFilters_h
4
5#include "SkImageFilter.h"
6#include "SkColorFilter.h"
7
8class SkOffsetImageFilter : public SkImageFilter {
9public:
10    SkOffsetImageFilter(SkScalar dx, SkScalar dy) {
11        fOffset.set(dx, dy);
12    }
13
14    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
15
16protected:
17    SkOffsetImageFilter(SkFlattenableReadBuffer& buffer);
18    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
19
20    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
21                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
22    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
23
24private:
25    SkVector fOffset;
26
27    typedef SkImageFilter INHERITED;
28};
29
30class SkComposeImageFilter : public SkImageFilter {
31public:
32    SkComposeImageFilter(SkImageFilter* outer, SkImageFilter* inner) {
33        fOuter = outer;
34        fInner = inner;
35        SkSafeRef(outer);
36        SkSafeRef(inner);
37    }
38    virtual ~SkComposeImageFilter();
39
40    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeImageFilter)
41
42protected:
43    SkComposeImageFilter(SkFlattenableReadBuffer& buffer);
44    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
45
46    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
47                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
48    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
49
50private:
51    SkImageFilter*  fOuter;
52    SkImageFilter*  fInner;
53
54    typedef SkImageFilter INHERITED;
55};
56
57#include "SkXfermode.h"
58
59class SkMergeImageFilter : public SkImageFilter {
60public:
61    SkMergeImageFilter(SkImageFilter* first, SkImageFilter* second,
62                       SkXfermode::Mode = SkXfermode::kSrcOver_Mode);
63    SkMergeImageFilter(SkImageFilter* const filters[], int count,
64                       const SkXfermode::Mode modes[] = NULL);
65    virtual ~SkMergeImageFilter();
66
67    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMergeImageFilter)
68
69protected:
70    SkMergeImageFilter(SkFlattenableReadBuffer& buffer);
71    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
72
73    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
74                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
75    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
76
77private:
78    SkImageFilter**     fFilters;
79    uint8_t*            fModes; // SkXfermode::Mode
80    int                 fCount;
81
82    // private storage, to avoid dynamically allocating storage for our copy
83    // of the filters and modes (unless fCount is so large we can't fit).
84    intptr_t    fStorage[16];
85
86    void initAlloc(int count, bool hasModes);
87    void init(SkImageFilter* const [], int count, const SkXfermode::Mode []);
88
89    typedef SkImageFilter INHERITED;
90};
91
92class SkColorFilterImageFilter : public SkImageFilter {
93public:
94    SkColorFilterImageFilter(SkColorFilter* cf) : fColorFilter(cf) {
95        SkSafeRef(cf);
96    }
97    virtual ~SkColorFilterImageFilter();
98
99    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorFilterImageFilter)
100
101protected:
102    SkColorFilterImageFilter(SkFlattenableReadBuffer& buffer);
103    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
104
105    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
106                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
107
108private:
109    SkColorFilter*  fColorFilter;
110
111    typedef SkImageFilter INHERITED;
112};
113
114///////////////////////////////////////////////////////////////////////////////
115
116// Fun mode that scales down (only) and then scales back up to look pixelated
117class SkDownSampleImageFilter : public SkImageFilter {
118public:
119    SkDownSampleImageFilter(SkScalar scale) : fScale(scale) {}
120
121    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDownSampleImageFilter)
122
123protected:
124    SkDownSampleImageFilter(SkFlattenableReadBuffer& buffer);
125    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
126
127    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
128                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
129
130private:
131    SkScalar fScale;
132
133    typedef SkImageFilter INHERITED;
134};
135
136#endif
137