summaryrefslogtreecommitdiffstats
path: root/Source/WebCore/rendering/RenderVideo.cpp
blob: 3a96ef8832872fda542403fee4fd31472d39c940 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
/*
 * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "config.h"

#if ENABLE(VIDEO)
#include "RenderVideo.h"

#include "Document.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLNames.h"
#include "HTMLVideoElement.h"
#include "MediaPlayer.h"
#include "PaintInfo.h"
#include "RenderView.h"

#if USE(ACCELERATED_COMPOSITING)
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#endif

using namespace std;

namespace WebCore {

using namespace HTMLNames;

RenderVideo::RenderVideo(HTMLVideoElement* video)
    : RenderMedia(video)
{
    setIntrinsicSize(calculateIntrinsicSize());
}

RenderVideo::~RenderVideo()
{
    if (MediaPlayer* p = mediaElement()->player()) {
        p->setVisible(false);
        p->setFrameView(0);
    }
}

IntSize RenderVideo::defaultSize()
{
    // These values are specified in the spec.
    static const int cDefaultWidth = 300;
    static const int cDefaultHeight = 150;

    return IntSize(cDefaultWidth, cDefaultHeight);
}

void RenderVideo::intrinsicSizeChanged()
{
    if (videoElement()->shouldDisplayPosterImage())
        RenderMedia::intrinsicSizeChanged();
    updateIntrinsicSize(); 
}

void RenderVideo::updateIntrinsicSize()
{
    IntSize size = calculateIntrinsicSize();
    size.scale(style()->effectiveZoom());

    // Never set the element size to zero when in a media document.
    if (size.isEmpty() && node()->ownerDocument() && node()->ownerDocument()->isMediaDocument())
        return;

    if (size == intrinsicSize())
        return;

    setIntrinsicSize(size);
    setPreferredLogicalWidthsDirty(true);
    setNeedsLayout(true);
}
    
IntSize RenderVideo::calculateIntrinsicSize()
{
    HTMLVideoElement* video = videoElement();
    
    // Spec text from 4.8.6
    //
    // The intrinsic width of a video element's playback area is the intrinsic width 
    // of the video resource, if that is available; otherwise it is the intrinsic 
    // width of the poster frame, if that is available; otherwise it is 300 CSS pixels.
    //
    // The intrinsic height of a video element's playback area is the intrinsic height 
    // of the video resource, if that is available; otherwise it is the intrinsic 
    // height of the poster frame, if that is available; otherwise it is 150 CSS pixels.
    MediaPlayer* player = mediaElement()->player();
    if (player && video->readyState() >= HTMLVideoElement::HAVE_METADATA)
        return player->naturalSize();

    if (video->shouldDisplayPosterImage() && !m_cachedImageSize.isEmpty() && !imageResource()->errorOccurred())
        return m_cachedImageSize;

    // When the natural size of the video is unavailable, we use the provided
    // width and height attributes of the video element as the intrinsic size until
    // better values become available. 
    if (video->hasAttribute(widthAttr) && video->hasAttribute(heightAttr))
        return IntSize(video->width(), video->height());

    // <video> in standalone media documents should not use the default 300x150
    // size since they also have audio-only files. By setting the intrinsic
    // size to 300x1 the video will resize itself in these cases, and audio will
    // have the correct height (it needs to be > 0 for controls to render properly).
    if (video->ownerDocument() && video->ownerDocument()->isMediaDocument())
        return IntSize(defaultSize().width(), 1);

    return defaultSize();
}

void RenderVideo::imageChanged(WrappedImagePtr newImage, const IntRect* rect)
{
    RenderMedia::imageChanged(newImage, rect);

    // Cache the image intrinsic size so we can continue to use it to draw the image correctly
    // even if we know the video intrinsic size but aren't able to draw video frames yet
    // (we don't want to scale the poster to the video size without keeping aspect ratio).
    if (videoElement()->shouldDisplayPosterImage())
        m_cachedImageSize = intrinsicSize();

    // The intrinsic size is now that of the image, but in case we already had the
    // intrinsic size of the video we call this here to restore the video size.
    updateIntrinsicSize();
}

IntRect RenderVideo::videoBox() const
{
    if (m_cachedImageSize.isEmpty() && videoElement()->shouldDisplayPosterImage())
        return IntRect();

    IntSize elementSize;
    if (videoElement()->shouldDisplayPosterImage())
        elementSize = m_cachedImageSize;
    else
        elementSize = intrinsicSize();

    IntRect contentRect = contentBoxRect();
    if (elementSize.isEmpty() || contentRect.isEmpty())
        return IntRect();

    IntRect renderBox = contentRect;
    int ratio = renderBox.width() * elementSize.height() - renderBox.height() * elementSize.width();
    if (ratio > 0) {
        int newWidth = renderBox.height() * elementSize.width() / elementSize.height();
        // Just fill the whole area if the difference is one pixel or less (in both sides)
        if (renderBox.width() - newWidth > 2)
            renderBox.setWidth(newWidth);
        renderBox.move((contentRect.width() - renderBox.width()) / 2, 0);
    } else if (ratio < 0) {
        int newHeight = renderBox.width() * elementSize.height() / elementSize.width();
        if (renderBox.height() - newHeight > 2)
            renderBox.setHeight(newHeight);
        renderBox.move(0, (contentRect.height() - renderBox.height()) / 2);
    }

    return renderBox;
}

bool RenderVideo::shouldDisplayVideo() const
{
    return !videoElement()->shouldDisplayPosterImage();
}

void RenderVideo::paintReplaced(PaintInfo& paintInfo, int tx, int ty)
{
    MediaPlayer* mediaPlayer = mediaElement()->player();
    bool displayingPoster = videoElement()->shouldDisplayPosterImage();

    if (!displayingPoster) {
        if (!mediaPlayer)
            return;
        updatePlayer();
    }

    IntRect rect = videoBox();
    if (rect.isEmpty())
        return;
    rect.move(tx, ty);

    if (displayingPoster)
        paintIntoRect(paintInfo.context, rect);
    else if (document()->view() && document()->view()->paintBehavior() & PaintBehaviorFlattenCompositingLayers)
        mediaPlayer->paintCurrentFrameInContext(paintInfo.context, rect);
    else
        mediaPlayer->paint(paintInfo.context, rect);
}

void RenderVideo::layout()
{
    RenderMedia::layout();
    updatePlayer();
}
    
HTMLVideoElement* RenderVideo::videoElement() const
{
    ASSERT(node()->hasTagName(videoTag));
    return static_cast<HTMLVideoElement*>(node()); 
}

void RenderVideo::updateFromElement()
{
    RenderMedia::updateFromElement();
    updatePlayer();
}

void RenderVideo::updatePlayer()
{
    updateIntrinsicSize();

    MediaPlayer* mediaPlayer = mediaElement()->player();
    if (!mediaPlayer)
        return;

    if (!videoElement()->inActiveDocument()) {
        mediaPlayer->setVisible(false);
        return;
    }

#if USE(ACCELERATED_COMPOSITING)
    layer()->contentChanged(RenderLayer::VideoChanged);
#endif
    
    IntRect videoBounds = videoBox(); 
    mediaPlayer->setFrameView(document()->view());
    mediaPlayer->setSize(IntSize(videoBounds.width(), videoBounds.height()));
    mediaPlayer->setVisible(true);
}

int RenderVideo::computeReplacedLogicalWidth(bool includeMaxWidth) const
{
    return RenderReplaced::computeReplacedLogicalWidth(includeMaxWidth);
}

int RenderVideo::computeReplacedLogicalHeight() const
{
    return RenderReplaced::computeReplacedLogicalHeight();
}

int RenderVideo::minimumReplacedHeight() const 
{
    return RenderReplaced::minimumReplacedHeight(); 
}

#if USE(ACCELERATED_COMPOSITING)
bool RenderVideo::supportsAcceleratedRendering() const
{
    MediaPlayer* p = mediaElement()->player();
    if (p)
        return p->supportsAcceleratedRendering();

    return false;
}

void RenderVideo::acceleratedRenderingStateChanged()
{
    MediaPlayer* p = mediaElement()->player();
    if (p)
        p->acceleratedRenderingStateChanged();
}
#endif  // USE(ACCELERATED_COMPOSITING)

} // namespace WebCore

#endif