1/*
2 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef CanvasPixelArray_h
30#define CanvasPixelArray_h
31
32#include <wtf/ByteArray.h>
33#include <wtf/MathExtras.h>
34#include <wtf/PassRefPtr.h>
35#include <wtf/RefCounted.h>
36#include <wtf/Vector.h>
37
38namespace WebCore {
39
40class CanvasPixelArray : public RefCounted<CanvasPixelArray> {
41public:
42    static PassRefPtr<CanvasPixelArray> create(unsigned length);
43    static PassRefPtr<CanvasPixelArray> create(PassRefPtr<ByteArray>);
44
45    ByteArray* data() { return m_data.get(); }
46    const ByteArray* data() const { return m_data.get(); }
47    unsigned length() const { return m_data->length(); }
48
49    void set(unsigned index, double value)
50    {
51        m_data->set(index, value);
52    }
53
54    void set(unsigned index, unsigned char value)
55    {
56        m_data->set(index, value);
57    }
58
59    bool get(unsigned index, unsigned char& result) const
60    {
61        return m_data->get(index, result);
62    }
63
64    unsigned char get(unsigned index) const
65    {
66        return m_data->get(index);
67    }
68
69private:
70    CanvasPixelArray(unsigned length);
71    CanvasPixelArray(PassRefPtr<ByteArray>);
72
73    RefPtr<ByteArray> m_data;
74};
75
76} // namespace WebCore
77
78#endif // CanvasPixelArray_h
79