1/*
2 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
3 * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
4 * Copyright (C) 2008, Google Inc. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "config.h"
29#include "platform/graphics/ImageSource.h"
30
31#include "platform/graphics/DeferredImageDecoder.h"
32#include "platform/image-decoders/ImageDecoder.h"
33#include "wtf/PassOwnPtr.h"
34#include "wtf/PassRefPtr.h"
35
36namespace WebCore {
37
38ImageSource::ImageSource(ImageSource::AlphaOption alphaOption, ImageSource::GammaAndColorProfileOption gammaAndColorProfileOption)
39    : m_alphaOption(alphaOption)
40    , m_gammaAndColorProfileOption(gammaAndColorProfileOption)
41{
42}
43
44ImageSource::~ImageSource()
45{
46}
47
48size_t ImageSource::clearCacheExceptFrame(size_t clearExceptFrame)
49{
50    return m_decoder ? m_decoder->clearCacheExceptFrame(clearExceptFrame) : 0;
51}
52
53bool ImageSource::initialized() const
54{
55    return m_decoder;
56}
57
58void ImageSource::setData(SharedBuffer& data, bool allDataReceived)
59{
60    // Make the decoder by sniffing the bytes.
61    // This method will examine the data and instantiate an instance of the appropriate decoder plugin.
62    // If insufficient bytes are available to determine the image type, no decoder plugin will be
63    // made.
64    if (!m_decoder)
65        m_decoder = DeferredImageDecoder::create(data, m_alphaOption, m_gammaAndColorProfileOption);
66
67    if (m_decoder)
68        m_decoder->setData(data, allDataReceived);
69}
70
71String ImageSource::filenameExtension() const
72{
73    return m_decoder ? m_decoder->filenameExtension() : String();
74}
75
76bool ImageSource::isSizeAvailable()
77{
78    return m_decoder && m_decoder->isSizeAvailable();
79}
80
81bool ImageSource::hasColorProfile() const
82{
83    return m_decoder && m_decoder->hasColorProfile();
84}
85
86IntSize ImageSource::size(RespectImageOrientationEnum shouldRespectOrientation) const
87{
88    return frameSizeAtIndex(0, shouldRespectOrientation);
89}
90
91IntSize ImageSource::frameSizeAtIndex(size_t index, RespectImageOrientationEnum shouldRespectOrientation) const
92{
93    if (!m_decoder)
94        return IntSize();
95
96    IntSize size = m_decoder->frameSizeAtIndex(index);
97    if ((shouldRespectOrientation == RespectImageOrientation) && m_decoder->orientation().usesWidthAsHeight())
98        return IntSize(size.height(), size.width());
99
100    return size;
101}
102
103bool ImageSource::getHotSpot(IntPoint& hotSpot) const
104{
105    return m_decoder ? m_decoder->hotSpot(hotSpot) : false;
106}
107
108int ImageSource::repetitionCount()
109{
110    return m_decoder ? m_decoder->repetitionCount() : cAnimationNone;
111}
112
113size_t ImageSource::frameCount() const
114{
115    return m_decoder ? m_decoder->frameCount() : 0;
116}
117
118PassRefPtr<NativeImageSkia> ImageSource::createFrameAtIndex(size_t index)
119{
120    if (!m_decoder)
121        return nullptr;
122
123    ImageFrame* buffer = m_decoder->frameBufferAtIndex(index);
124    if (!buffer || buffer->status() == ImageFrame::FrameEmpty)
125        return nullptr;
126
127    // Zero-height images can cause problems for some ports.  If we have an
128    // empty image dimension, just bail.
129    if (size().isEmpty())
130        return nullptr;
131
132    // Return the buffer contents as a native image.  For some ports, the data
133    // is already in a native container, and this just increments its refcount.
134    return buffer->asNewNativeImage();
135}
136
137float ImageSource::frameDurationAtIndex(size_t index) const
138{
139    if (!m_decoder)
140        return 0;
141
142    // Many annoying ads specify a 0 duration to make an image flash as quickly as possible.
143    // We follow Firefox's behavior and use a duration of 100 ms for any frames that specify
144    // a duration of <= 10 ms. See <rdar://problem/7689300> and <http://webkit.org/b/36082>
145    // for more information.
146    const float duration = m_decoder->frameDurationAtIndex(index) / 1000.0f;
147    if (duration < 0.011f)
148        return 0.100f;
149    return duration;
150}
151
152ImageOrientation ImageSource::orientationAtIndex(size_t) const
153{
154    return m_decoder ? m_decoder->orientation() : DefaultImageOrientation;
155}
156
157bool ImageSource::frameHasAlphaAtIndex(size_t index) const
158{
159    return !m_decoder || m_decoder->frameHasAlphaAtIndex(index);
160}
161
162bool ImageSource::frameIsCompleteAtIndex(size_t index) const
163{
164    return m_decoder && m_decoder->frameIsCompleteAtIndex(index);
165}
166
167unsigned ImageSource::frameBytesAtIndex(size_t index) const
168{
169    if (!m_decoder)
170        return 0;
171    return m_decoder->frameBytesAtIndex(index);
172}
173
174}
175