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List:       freedesktop-xorg
Subject:    Question about Xvideo and shadow
From:       <yangshuai126 () 126 ! com>
Date:       2011-12-19 14:14:28
Message-ID: 1f5b64bf.1ca67.13456ac6f0f.Coremail.yangshuai126 () 126 ! com
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 hi,all

 I modify the standard driver of fbdev,and add the xv adaptor.

 So in the fbdev driver ,there are shadow and xv at the same time.

 Then I found a problem:
 When I move the video window(which use the xvimagesink),the picture in the window is \
not the video frame but the data from the shadow buffer.At the same time,When I move \
the mouse in the video window ,I can see a block data from the shadow buffer instead \
of the video data.

I think it's too bad for the user.

How can I improve the experience  when I use both shadow and xvideo?

If I don't use shadow,I must make the FB cacheable to ensure the result of x11perf is \
not too bad.But there are lots of stripes ,when I make the FB cacheable.

So,I think maybe I could add a cache flush ioctl at the point when the xorg complete \
a drawing action.I think if i do so,the stripes will be greatly reduced.

But where I should add the cache flush ioctl in the source code of xorg?

Any advice is welcome!


Thanks!

Best Regards,
David


[Attachment #5 (text/html)]

<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial">&nbsp;hi,all<br><br>&nbsp;I \
modify the standard driver of fbdev,and add the xv adaptor.<br><br>&nbsp;So in the \
fbdev driver ,there are shadow and xv at the same time.<br><br>&nbsp;Then I found a \
problem:<br>&nbsp;When I move the video window(which use the xvimagesink),the picture \
in the window is not the video frame but the data from the shadow buffer.At the same \
time,When I move the mouse in the video window ,I can see a block data from the \
shadow buffer instead of the video data.<br><br>I think it's too bad for the \
user.<br><br>How can I improve the experience&nbsp; when I use both shadow and \
xvideo?<br><br>If I don't use shadow,I must make the FB cacheable to ensure the \
result of x11perf is not too bad.But there are lots of stripes ,when I make the FB \
cacheable.<br><br>So,I think maybe I could add a cache flush ioctl at the point when \
the xorg complete a drawing action.I think if i do so,the stripe  s will be greatly \
reduced.<br><br>But where I should add the cache flush ioctl in the source code of \
xorg?<br><br>Any advice is welcome!<br><br><br>Thanks!<br><br>Best \
Regards,<br>David<br><br></div><br><br><span title="neteasefooter"><span \
id="netease_mail_footer"></span></span>



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