SkColorMatrixFilter.h revision ba28d03e94dc221d6a803bf2a84a420b9159255c 
1
2/*
3 * Copyright 2007 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10#ifndef SkColorMatrixFilter_DEFINED
11#define SkColorMatrixFilter_DEFINED
12
13#include "SkColorFilter.h"
14#include "SkColorMatrix.h"
15
16class SK_API SkColorMatrixFilter : public SkColorFilter {
17public:
18    SkColorMatrixFilter();
19    explicit SkColorMatrixFilter(const SkColorMatrix&);
20    SkColorMatrixFilter(const SkScalar array[20]);
21
22    void setMatrix(const SkColorMatrix&);
23    void setArray(const SkScalar array[20]);
24
25    // overrides from SkColorFilter
26    virtual void filterSpan(const SkPMColor src[], int count, SkPMColor[]) SK_OVERRIDE;
27    virtual void filterSpan16(const uint16_t src[], int count, uint16_t[]) SK_OVERRIDE;
28    virtual uint32_t getFlags() SK_OVERRIDE;
29    virtual bool asColorMatrix(SkScalar matrix[20]) SK_OVERRIDE;
30
31    // overrides for SkFlattenable
32    virtual void flatten(SkFlattenableWriteBuffer& buffer) SK_OVERRIDE;
33
34    struct State {
35        int32_t fArray[20];
36        int     fShift;
37        int32_t fResult[4];
38    };
39
40    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorMatrixFilter)
41
42protected:
43    SkColorMatrixFilter(SkFlattenableReadBuffer& buffer);
44
45private:
46
47    typedef void (*Proc)(State*, unsigned r, unsigned g, unsigned b,
48                         unsigned a);
49
50    Proc        fProc;
51    State       fState;
52    uint32_t    fFlags;
53
54    void setup(const SkScalar array[20]);
55
56    typedef SkColorFilter INHERITED;
57};
58
59#endif
60