1 /*
2 * Copyright (C) 2007, 2008, 2009, 2010 Apple 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 "core/html/HTMLVideoElement.h"
28
29 #include "bindings/core/v8/ExceptionState.h"
30 #include "core/CSSPropertyNames.h"
31 #include "core/HTMLNames.h"
32 #include "core/dom/Attribute.h"
33 #include "core/dom/Document.h"
34 #include "core/dom/ExceptionCode.h"
35 #include "core/dom/shadow/ShadowRoot.h"
36 #include "core/frame/Settings.h"
37 #include "core/html/HTMLImageLoader.h"
38 #include "core/html/canvas/CanvasRenderingContext.h"
39 #include "core/html/parser/HTMLParserIdioms.h"
40 #include "core/rendering/RenderImage.h"
41 #include "core/rendering/RenderVideo.h"
42 #include "platform/UserGestureIndicator.h"
43 #include "platform/graphics/GraphicsContext.h"
44 #include "platform/graphics/gpu/Extensions3DUtil.h"
45 #include "public/platform/WebCanvas.h"
46 #include "public/platform/WebGraphicsContext3D.h"
47
48 namespace blink {
49
50 using namespace HTMLNames;
51
HTMLVideoElement(Document & document)52 inline HTMLVideoElement::HTMLVideoElement(Document& document)
53 : HTMLMediaElement(videoTag, document)
54 {
55 if (document.settings())
56 m_defaultPosterURL = AtomicString(document.settings()->defaultVideoPosterURL());
57 }
58
create(Document & document)59 PassRefPtrWillBeRawPtr<HTMLVideoElement> HTMLVideoElement::create(Document& document)
60 {
61 RefPtrWillBeRawPtr<HTMLVideoElement> video = adoptRefWillBeNoop(new HTMLVideoElement(document));
62 video->ensureUserAgentShadowRoot();
63 video->suspendIfNeeded();
64 return video.release();
65 }
66
trace(Visitor * visitor)67 void HTMLVideoElement::trace(Visitor* visitor)
68 {
69 visitor->trace(m_imageLoader);
70 HTMLMediaElement::trace(visitor);
71 }
72
rendererIsNeeded(const RenderStyle & style)73 bool HTMLVideoElement::rendererIsNeeded(const RenderStyle& style)
74 {
75 return HTMLElement::rendererIsNeeded(style);
76 }
77
createRenderer(RenderStyle *)78 RenderObject* HTMLVideoElement::createRenderer(RenderStyle*)
79 {
80 return new RenderVideo(this);
81 }
82
attach(const AttachContext & context)83 void HTMLVideoElement::attach(const AttachContext& context)
84 {
85 HTMLMediaElement::attach(context);
86
87 updateDisplayState();
88 if (shouldDisplayPosterImage()) {
89 if (!m_imageLoader)
90 m_imageLoader = HTMLImageLoader::create(this);
91 m_imageLoader->updateFromElement();
92 if (renderer())
93 toRenderImage(renderer())->imageResource()->setImageResource(m_imageLoader->image());
94 }
95 }
96
collectStyleForPresentationAttribute(const QualifiedName & name,const AtomicString & value,MutableStylePropertySet * style)97 void HTMLVideoElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style)
98 {
99 if (name == widthAttr)
100 addHTMLLengthToStyle(style, CSSPropertyWidth, value);
101 else if (name == heightAttr)
102 addHTMLLengthToStyle(style, CSSPropertyHeight, value);
103 else
104 HTMLMediaElement::collectStyleForPresentationAttribute(name, value, style);
105 }
106
isPresentationAttribute(const QualifiedName & name) const107 bool HTMLVideoElement::isPresentationAttribute(const QualifiedName& name) const
108 {
109 if (name == widthAttr || name == heightAttr)
110 return true;
111 return HTMLMediaElement::isPresentationAttribute(name);
112 }
113
parseAttribute(const QualifiedName & name,const AtomicString & value)114 void HTMLVideoElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
115 {
116 if (name == posterAttr) {
117 // Force a poster recalc by setting m_displayMode to Unknown directly before calling updateDisplayState.
118 HTMLMediaElement::setDisplayMode(Unknown);
119 updateDisplayState();
120 if (shouldDisplayPosterImage()) {
121 if (!m_imageLoader)
122 m_imageLoader = HTMLImageLoader::create(this);
123 m_imageLoader->updateFromElement(ImageLoader::UpdateIgnorePreviousError);
124 } else {
125 if (renderer())
126 toRenderImage(renderer())->imageResource()->setImageResource(0);
127 }
128 // Notify the player when the poster image URL changes.
129 if (webMediaPlayer())
130 webMediaPlayer()->setPoster(posterImageURL());
131 } else {
132 HTMLMediaElement::parseAttribute(name, value);
133 }
134 }
135
supportsFullscreen() const136 bool HTMLVideoElement::supportsFullscreen() const
137 {
138 if (!document().page())
139 return false;
140
141 if (!webMediaPlayer())
142 return false;
143
144 return true;
145 }
146
videoWidth() const147 unsigned HTMLVideoElement::videoWidth() const
148 {
149 if (!webMediaPlayer())
150 return 0;
151 return webMediaPlayer()->naturalSize().width;
152 }
153
videoHeight() const154 unsigned HTMLVideoElement::videoHeight() const
155 {
156 if (!webMediaPlayer())
157 return 0;
158 return webMediaPlayer()->naturalSize().height;
159 }
160
isURLAttribute(const Attribute & attribute) const161 bool HTMLVideoElement::isURLAttribute(const Attribute& attribute) const
162 {
163 return attribute.name() == posterAttr || HTMLMediaElement::isURLAttribute(attribute);
164 }
165
imageSourceURL() const166 const AtomicString HTMLVideoElement::imageSourceURL() const
167 {
168 const AtomicString& url = getAttribute(posterAttr);
169 if (!stripLeadingAndTrailingHTMLSpaces(url).isEmpty())
170 return url;
171 return m_defaultPosterURL;
172 }
173
setDisplayMode(DisplayMode mode)174 void HTMLVideoElement::setDisplayMode(DisplayMode mode)
175 {
176 DisplayMode oldMode = displayMode();
177 KURL poster = posterImageURL();
178
179 if (!poster.isEmpty()) {
180 // We have a poster path, but only show it until the user triggers display by playing or seeking and the
181 // media engine has something to display.
182 // Don't show the poster if there is a seek operation or
183 // the video has restarted because of loop attribute
184 if (mode == Video && oldMode == Poster && !hasAvailableVideoFrame())
185 mode = PosterWaitingForVideo;
186 }
187
188 HTMLMediaElement::setDisplayMode(mode);
189
190 if (renderer() && displayMode() != oldMode)
191 renderer()->updateFromElement();
192 }
193
updateDisplayState()194 void HTMLVideoElement::updateDisplayState()
195 {
196 if (posterImageURL().isEmpty())
197 setDisplayMode(Video);
198 else if (displayMode() < Poster)
199 setDisplayMode(Poster);
200 }
201
paintCurrentFrameInContext(GraphicsContext * context,const IntRect & destRect) const202 void HTMLVideoElement::paintCurrentFrameInContext(GraphicsContext* context, const IntRect& destRect) const
203 {
204 if (!webMediaPlayer())
205 return;
206
207 WebCanvas* canvas = context->canvas();
208 SkXfermode::Mode mode = WebCoreCompositeToSkiaComposite(context->compositeOperation(), context->blendModeOperation());
209 webMediaPlayer()->paint(canvas, destRect, context->getNormalizedAlpha(), mode);
210 }
211
copyVideoTextureToPlatformTexture(WebGraphicsContext3D * context,Platform3DObject texture,GLint level,GLenum internalFormat,GLenum type,bool premultiplyAlpha,bool flipY)212 bool HTMLVideoElement::copyVideoTextureToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLint level, GLenum internalFormat, GLenum type, bool premultiplyAlpha, bool flipY)
213 {
214 if (!webMediaPlayer())
215 return false;
216
217 if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(internalFormat, type, level))
218 return false;
219
220 return webMediaPlayer()->copyVideoTextureToPlatformTexture(context, texture, level, internalFormat, type, premultiplyAlpha, flipY);
221 }
222
hasAvailableVideoFrame() const223 bool HTMLVideoElement::hasAvailableVideoFrame() const
224 {
225 if (!webMediaPlayer())
226 return false;
227
228 return webMediaPlayer()->hasVideo() && webMediaPlayer()->readyState() >= blink::WebMediaPlayer::ReadyStateHaveCurrentData;
229 }
230
webkitEnterFullscreen(ExceptionState & exceptionState)231 void HTMLVideoElement::webkitEnterFullscreen(ExceptionState& exceptionState)
232 {
233 if (isFullscreen())
234 return;
235
236 if (!supportsFullscreen()) {
237 exceptionState.throwDOMException(InvalidStateError, "This element does not support fullscreen mode.");
238 return;
239 }
240
241 enterFullscreen();
242 }
243
webkitExitFullscreen()244 void HTMLVideoElement::webkitExitFullscreen()
245 {
246 if (isFullscreen())
247 exitFullscreen();
248 }
249
webkitSupportsFullscreen()250 bool HTMLVideoElement::webkitSupportsFullscreen()
251 {
252 return supportsFullscreen();
253 }
254
webkitDisplayingFullscreen()255 bool HTMLVideoElement::webkitDisplayingFullscreen()
256 {
257 return isFullscreen();
258 }
259
didMoveToNewDocument(Document & oldDocument)260 void HTMLVideoElement::didMoveToNewDocument(Document& oldDocument)
261 {
262 if (m_imageLoader)
263 m_imageLoader->elementDidMoveToNewDocument();
264 HTMLMediaElement::didMoveToNewDocument(oldDocument);
265 }
266
webkitDecodedFrameCount() const267 unsigned HTMLVideoElement::webkitDecodedFrameCount() const
268 {
269 if (!webMediaPlayer())
270 return 0;
271
272 return webMediaPlayer()->decodedFrameCount();
273 }
274
webkitDroppedFrameCount() const275 unsigned HTMLVideoElement::webkitDroppedFrameCount() const
276 {
277 if (!webMediaPlayer())
278 return 0;
279
280 return webMediaPlayer()->droppedFrameCount();
281 }
282
posterImageURL() const283 KURL HTMLVideoElement::posterImageURL() const
284 {
285 String url = stripLeadingAndTrailingHTMLSpaces(imageSourceURL());
286 if (url.isEmpty())
287 return KURL();
288 return document().completeURL(url);
289 }
290
mediaPlayerPosterURL()291 KURL HTMLVideoElement::mediaPlayerPosterURL()
292 {
293 return posterImageURL();
294 }
295
getSourceImageForCanvas(SourceImageMode mode,SourceImageStatus * status) const296 PassRefPtr<Image> HTMLVideoElement::getSourceImageForCanvas(SourceImageMode mode, SourceImageStatus* status) const
297 {
298 if (!hasAvailableVideoFrame()) {
299 *status = InvalidSourceImageStatus;
300 return nullptr;
301 }
302
303 IntSize intrinsicSize(videoWidth(), videoHeight());
304 OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(intrinsicSize);
305 if (!imageBuffer) {
306 *status = InvalidSourceImageStatus;
307 return nullptr;
308 }
309
310 paintCurrentFrameInContext(imageBuffer->context(), IntRect(IntPoint(0, 0), intrinsicSize));
311
312 *status = NormalSourceImageStatus;
313 return imageBuffer->copyImage(mode == CopySourceImageIfVolatile ? CopyBackingStore : DontCopyBackingStore, Unscaled);
314 }
315
wouldTaintOrigin(SecurityOrigin * destinationSecurityOrigin) const316 bool HTMLVideoElement::wouldTaintOrigin(SecurityOrigin* destinationSecurityOrigin) const
317 {
318 return !hasSingleSecurityOrigin() || (!(webMediaPlayer() && webMediaPlayer()->didPassCORSAccessCheck()) && destinationSecurityOrigin->taintsCanvas(currentSrc()));
319 }
320
sourceSize() const321 FloatSize HTMLVideoElement::sourceSize() const
322 {
323 return FloatSize(videoWidth(), videoHeight());
324 }
325
326 }
327