[webkit-qt] How to draw a hole in browser to show the video content

Thu Sep 27 08:49:43 PDT 2012

Hello Andy,

I have done this on a old project for a similar purpose. Basically you have
to configure Webwiew to be rendered on a translucent Window.

Maybe this link can help:
http://www.mail-archive.com/webkit-qt@lists.webkit.org/msg00940.html

After that, you can use a Background image (at your html) with a
transparent rectangle. With that you have a hole on your browser window.

best regards,
*Bruno Ledesma*

2012/9/27 andy wang <wandy817 at gmail.com>

> Hi All,
> I want to draw a hole in the browser to show the video which below the the
> browser.
> To play/show the video of html5, I need to decode the audio/video by the
> hardware because of the poor cpu and memory, and I use the gstreamer
> architecture. In the webkit core, there are already some module to support
> the video tag of html5, HTMLMediaElement, HTMLVideoElement, MediaPlayer,
> MediaPlayerPrivate MediaPlayerPrivateGstreamer and so on. And this solution
> is using the ffmpeg or other software decode and then transfer the decoded
> data to webkit, at last render the video data to OSD layer. But my embedded
> device have poor cpu ability so I need use the hardware decode and then
> render the video data to the video layer which below the osd layer. And now
> I can decode the video stream and render it to the video layer(Not link the
> m_webkitVideoSink to m_PlayBin in
> MediaPlayerPrivateGStreamer::createGSTPlayBin, so the data will go through
> to my video sink), but I can not see the video because it's converd by the
> browser. So my question is how can i cut a hole in the browser to show the
> video, and this hole should have the same size and position with the video
> window.
>
> I try to fix this issue by draw the hole in the paint function of
> MediaPlayerPrivateGStreamer::paint, but the hole will be coverd by the
> browser background soon. So I don't know how to keep my hole alwasy there
> so I can see the video.
>
> I Use the qt4.8.0 version. And the paint engine is directfb.
>
> 2012/9/27 <webkit-qt-request at lists.webkit.org>
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>> Message: 1
>> Date: Wed, 26 Sep 2012 11:29:30 -0700 (PDT)
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>> Updates:
>>   * rtakacs status: still hacking our and Khronos' webgl test environment
>>   * bbandix status: extended QML WebView examples and pushed them to
>> gerrit for review
>>   * Ossy status: still hacking LLInt - http://wkb.ug/95749 , found what
>> broke all EWS bots for half a day - http://wkb.ug/97647 , still hacking
>> with an EvenSenderProxy bug - http://wkb.ug/92231 , minor gardening:
>> skip/unskip tests and a buildfix
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>> patch
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>> out an LLInt patch on Windows for Ossy.
>>   * dicska status: fix WTR to use 60 sec longtimeout instead of 30 sec
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>>   * setanta status: gardening Qt5 regressions
>>   * kbalazs status: sickened today :(
>>   * carewolf status: Trying to share more X11 global selection code
>> between platforms
>>   * jturcotte status: Fixed a crash on any key press in xcb-xlib. Looking
>> at the qml auto test crashes and doing between-build-uploads of the rest of
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