1 /*
2 * Copyright (C) 2006 Apple Computer, 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 #include "config.h"
27 #include "ImageDecoder.h"
28
29 #include <cairo.h>
30
31 namespace WebCore {
32
RGBA32Buffer()33 RGBA32Buffer::RGBA32Buffer()
34 : m_hasAlpha(false)
35 , m_status(FrameEmpty)
36 , m_duration(0)
37 , m_disposalMethod(DisposeNotSpecified)
38 {
39 }
40
clear()41 void RGBA32Buffer::clear()
42 {
43 m_bytes.clear();
44 m_status = FrameEmpty;
45 // NOTE: Do not reset other members here; clearFrameBufferCache()
46 // calls this to free the bitmap data, but other functions like
47 // initFrameBuffer() and frameComplete() may still need to read
48 // other metadata out of this frame later.
49 }
50
zeroFill()51 void RGBA32Buffer::zeroFill()
52 {
53 m_bytes.fill(0);
54 m_hasAlpha = true;
55 }
56
copyBitmapData(const RGBA32Buffer & other)57 void RGBA32Buffer::copyBitmapData(const RGBA32Buffer& other)
58 {
59 if (this == &other)
60 return;
61
62 m_bytes = other.m_bytes;
63 m_size = other.m_size;
64 setHasAlpha(other.m_hasAlpha);
65 }
66
setSize(int newWidth,int newHeight)67 bool RGBA32Buffer::setSize(int newWidth, int newHeight)
68 {
69 // NOTE: This has no way to check for allocation failure if the
70 // requested size was too big...
71 m_bytes.resize(newWidth * newHeight);
72 m_size = IntSize(newWidth, newHeight);
73
74 // Zero the image.
75 zeroFill();
76
77 return true;
78 }
79
asNewNativeImage() const80 NativeImagePtr RGBA32Buffer::asNewNativeImage() const
81 {
82 return cairo_image_surface_create_for_data(
83 reinterpret_cast<unsigned char*>(const_cast<PixelData*>(
84 m_bytes.data())), CAIRO_FORMAT_ARGB32, width(), height(),
85 width() * sizeof(PixelData));
86 }
87
hasAlpha() const88 bool RGBA32Buffer::hasAlpha() const
89 {
90 return m_hasAlpha;
91 }
92
setHasAlpha(bool alpha)93 void RGBA32Buffer::setHasAlpha(bool alpha)
94 {
95 m_hasAlpha = alpha;
96 }
97
setStatus(FrameStatus status)98 void RGBA32Buffer::setStatus(FrameStatus status)
99 {
100 m_status = status;
101 }
102
operator =(const RGBA32Buffer & other)103 RGBA32Buffer& RGBA32Buffer::operator=(const RGBA32Buffer& other)
104 {
105 if (this == &other)
106 return *this;
107
108 copyBitmapData(other);
109 setRect(other.rect());
110 setStatus(other.status());
111 setDuration(other.duration());
112 setDisposalMethod(other.disposalMethod());
113 return *this;
114 }
115
width() const116 int RGBA32Buffer::width() const {
117 return m_size.width();
118 }
119
height() const120 int RGBA32Buffer::height() const {
121 return m_size.height();
122 }
123
124 } // namespace WebCore
125