OLD | NEW |
| (Empty) |
1 /* | |
2 * Copyright (c) 2009, Google 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 are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #include "config.h" | |
32 #include <CanvasPixelArray.h> | |
33 | |
34 #include <v8_proxy.h> | |
35 #include <wtf/Assertions.h> | |
36 | |
37 namespace WebCore { | |
38 | |
39 CanvasPixelArray::CanvasPixelArray(size_t length) | |
40 { | |
41 ASSERT((length & 3) == 0); // Length must be a multiple of 4. | |
42 m_length = length; | |
43 m_data = static_cast<unsigned char*>(fastMalloc(m_length)); | |
44 } | |
45 | |
46 CanvasPixelArray::~CanvasPixelArray() | |
47 { | |
48 fastFree(m_data); | |
49 // Ensure that accesses after destruction will fail. In case there is a | |
50 // dangling reference. | |
51 m_length = 0; | |
52 m_data = reinterpret_cast<unsigned char*>(-1); | |
53 } | |
54 | |
55 size_t CanvasPixelArray::length() const | |
56 { | |
57 return m_length; | |
58 } | |
59 | |
60 unsigned char* CanvasPixelArray::data() | |
61 { | |
62 return m_data; | |
63 } | |
64 | |
65 unsigned char CanvasPixelArray::get(size_t index) | |
66 { | |
67 ASSERT(index < m_length); | |
68 return m_data[index]; | |
69 } | |
70 | |
71 void CanvasPixelArray::set(size_t index, double value) | |
72 { | |
73 ASSERT(index < m_length); | |
74 if (!(value > 0)) { // Test for NaN and less than zero in one go. | |
75 value = 0; | |
76 } else if (value > 255) { | |
77 value = 255; | |
78 } | |
79 m_data[index] = static_cast<unsigned char>(value + 0.5); | |
80 } | |
81 | |
82 } // namespace WebCore | |
OLD | NEW |