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      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 #ifndef HTMLVideoElement_h
     27 #define HTMLVideoElement_h
     28 
     29 #include "core/html/HTMLMediaElement.h"
     30 #include "core/html/canvas/CanvasImageSource.h"
     31 
     32 namespace blink {
     33 class WebGraphicsContext3D;
     34 }
     35 
     36 namespace WebCore {
     37 
     38 class ExceptionState;
     39 class HTMLImageLoader;
     40 
     41 class HTMLVideoElement FINAL : public HTMLMediaElement, public CanvasImageSource {
     42 public:
     43     static PassRefPtrWillBeRawPtr<HTMLVideoElement> create(Document&);
     44     virtual void trace(Visitor*) OVERRIDE;
     45 
     46     unsigned videoWidth() const;
     47     unsigned videoHeight() const;
     48 
     49     // Fullscreen
     50     void webkitEnterFullscreen(ExceptionState&);
     51     void webkitExitFullscreen();
     52     bool webkitSupportsFullscreen();
     53     bool webkitDisplayingFullscreen();
     54 
     55     // Statistics
     56     unsigned webkitDecodedFrameCount() const;
     57     unsigned webkitDroppedFrameCount() const;
     58 
     59     // Used by canvas to gain raw pixel access
     60     void paintCurrentFrameInContext(GraphicsContext*, const IntRect&) const;
     61 
     62     // Used by WebGL to do GPU-GPU textures copy if possible.
     63     // See more details at MediaPlayer::copyVideoTextureToPlatformTexture() defined in Source/WebCore/platform/graphics/MediaPlayer.h.
     64     bool copyVideoTextureToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject texture, GC3Dint level, GC3Denum type, GC3Denum internalFormat, bool premultiplyAlpha, bool flipY);
     65 
     66     bool shouldDisplayPosterImage() const { return displayMode() == Poster || displayMode() == PosterWaitingForVideo; }
     67 
     68     KURL posterImageURL() const;
     69 
     70     // FIXME: Remove this when WebMediaPlayerClientImpl::loadInternal does not depend on it.
     71     virtual KURL mediaPlayerPosterURL() OVERRIDE;
     72 
     73     // CanvasImageSource implementation
     74     virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageMode, SourceImageStatus*) const OVERRIDE;
     75     virtual bool isVideoElement() const OVERRIDE { return true; }
     76     virtual bool wouldTaintOrigin(SecurityOrigin*) const OVERRIDE;
     77     virtual FloatSize sourceSize() const OVERRIDE;
     78     virtual const KURL& sourceURL() const OVERRIDE { return currentSrc(); }
     79 
     80 private:
     81     HTMLVideoElement(Document&);
     82 
     83     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
     84     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     85     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     86     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     87     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     88     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
     89     virtual bool hasVideo() const OVERRIDE { return webMediaPlayer() && webMediaPlayer()->hasVideo(); }
     90     bool supportsFullscreen() const;
     91     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
     92     virtual const AtomicString imageSourceURL() const OVERRIDE;
     93 
     94     bool hasAvailableVideoFrame() const;
     95     virtual void updateDisplayState() OVERRIDE;
     96     virtual void didMoveToNewDocument(Document& oldDocument) OVERRIDE;
     97     virtual void setDisplayMode(DisplayMode) OVERRIDE;
     98 
     99     OwnPtrWillBeMember<HTMLImageLoader> m_imageLoader;
    100 
    101     AtomicString m_defaultPosterURL;
    102 };
    103 
    104 } //namespace
    105 
    106 #endif
    107