← Back to branch summary

~oif-team/ubuntu/natty/qt4-x11/xi2.1

« back to all changes in this revision

Viewing changes to src/3rdparty/webkit/WebCore/html/canvas/CanvasShortArray.h

  • Committer: Bazaar Package Importer
  • Author(s): Alessandro Ghersi
  • Date: 2009-11-02 18:30:08 UTC
  • mfrom: (1.2.2 upstream)
  • mto: (15.2.5 experimental)
  • mto: This revision was merged to the branch mainline in revision 88.
  • Revision ID: james.westby@ubuntu.com-20091102183008-b6a4gcs128mvfb3m
Tags: upstream-4.6.0~beta1
Import upstream version 4.6.0~beta1

Show diffs side-by-side

added added

removed removed

Lines of Context:
src/3rdparty/webkit/WebCore/html/canvas/CanvasShortArray.h
 
1
/*
 
2
 * Copyright (C) 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
 * 1. Redistributions of source code must retain the above copyright
 
8
 *    notice, this list of conditions and the following disclaimer.
 
9
 * 2. Redistributions in binary form must reproduce the above copyright
 
10
 *    notice, this list of conditions and the following disclaimer in the
 
11
 *    documentation and/or other materials provided with the distribution.
 
12
 *
 
13
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 
14
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 
15
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 
16
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 
17
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 
18
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 
19
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 
20
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 
21
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
22
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 
23
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 
24
 */
 
25
 
 
26
#ifndef CanvasShortArray_h
 
27
#define CanvasShortArray_h
 
28
 
 
29
#include "CanvasArray.h"
 
30
#include <wtf/MathExtras.h>
 
31
#include <wtf/PassRefPtr.h>
 
32
#include <wtf/RefCounted.h>
 
33
 
 
34
namespace WebCore {
 
35
    
 
36
    class CanvasShortArray : public CanvasArray {
 
37
    public:
 
38
        static PassRefPtr<CanvasShortArray> create(unsigned length);
 
39
        static PassRefPtr<CanvasShortArray> create(short* array, unsigned length);
 
40
        static PassRefPtr<CanvasShortArray> create(PassRefPtr<CanvasArrayBuffer> buffer, int offset, unsigned length);
 
41
 
 
42
        short* data() { return static_cast<short*>(baseAddress()); }
 
43
 
 
44
        virtual unsigned length() const;
 
45
        virtual unsigned sizeInBytes() const;
 
46
 
 
47
        void set(unsigned index, double value)
 
48
        {
 
49
            if (index >= m_size)
 
50
                return;
 
51
            if (isnan(value)) // Clamp NaN to 0
 
52
                value = 0;
 
53
            if (value < std::numeric_limits<short>::min())
 
54
                value = std::numeric_limits<short>::min();
 
55
            else if (value > std::numeric_limits<short>::max())
 
56
                value = std::numeric_limits<short>::max();
 
57
            short* storage = static_cast<short*>(m_baseAddress);
 
58
            storage[index] = static_cast<short>(value);
 
59
        }
 
60
        
 
61
        bool get(unsigned index, short& result) const
 
62
        {
 
63
            if (index >= m_size)
 
64
                return false;
 
65
            result = item(index);
 
66
            return true;
 
67
        }
 
68
        
 
69
        short item(unsigned index) const
 
70
        {
 
71
            ASSERT(index < m_size);
 
72
            short* storage = static_cast<short*>(m_baseAddress);
 
73
            return storage[index];
 
74
        }
 
75
 
 
76
    private:
 
77
        CanvasShortArray(PassRefPtr<CanvasArrayBuffer> buffer, int offset, unsigned length);
 
78
        unsigned m_size;
 
79
    };
 
80
    
 
81
} // namespace WebCore
 
82
 
 
83
#endif // CanvasShortArray_h