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 "WebImage.h"
33
34 #include "Image.h"
35 #include "ImageSource.h"
36 #include "SharedBuffer.h"
37
38 #include "WebData.h"
39 #include "WebSize.h"
40
41 #include <CoreGraphics/CGImage.h>
42
43 #include <wtf/PassRefPtr.h>
44 #include <wtf/RetainPtr.h>
45
46 using namespace WebCore;
47
48 namespace WebKit {
49
fromData(const WebData & data,const WebSize & desiredSize)50 WebImage WebImage::fromData(const WebData& data, const WebSize& desiredSize)
51 {
52 // FIXME: Do something like what WebImageSkia.cpp does to enumerate frames.
53 // Not sure whether the CG decoder uses the same frame ordering rules (if so
54 // we can just use the same logic).
55
56 ImageSource source;
57 source.setData(PassRefPtr<SharedBuffer>(data).get(), true);
58 if (!source.isSizeAvailable())
59 return WebImage();
60
61 RetainPtr<CGImageRef> frame0(AdoptCF, source.createFrameAtIndex(0));
62 if (!frame0)
63 return WebImage();
64
65 return WebImage(frame0.get());
66 }
67
reset()68 void WebImage::reset()
69 {
70 CGImageRelease(m_imageRef);
71 m_imageRef = 0;
72 }
73
assign(const WebImage & image)74 void WebImage::assign(const WebImage& image)
75 {
76 assign(image.m_imageRef);
77 }
78
isNull() const79 bool WebImage::isNull() const
80 {
81 return !m_imageRef;
82 }
83
size() const84 WebSize WebImage::size() const
85 {
86 return WebSize(CGImageGetWidth(m_imageRef), CGImageGetHeight(m_imageRef));
87 }
88
WebImage(const PassRefPtr<Image> & image)89 WebImage::WebImage(const PassRefPtr<Image>& image)
90 : m_imageRef(0)
91 {
92 if (image.get())
93 assign(image->nativeImageForCurrentFrame());
94 }
95
operator =(const PassRefPtr<Image> & image)96 WebImage& WebImage::operator=(const PassRefPtr<Image>& image)
97 {
98 if (image.get())
99 assign(image->nativeImageForCurrentFrame());
100 else
101 reset();
102 return *this;
103 }
104
assign(CGImageRef imageRef)105 void WebImage::assign(CGImageRef imageRef)
106 {
107 // Make sure to retain the imageRef first incase m_imageRef == imageRef.
108 CGImageRetain(imageRef);
109 CGImageRelease(m_imageRef);
110 m_imageRef = imageRef;
111 }
112
113 } // namespace WebKit
114