Intel 2.1.1 and HDTV tearing
nico at youplala.net
Sat Aug 18 14:32:05 PDT 2007
Michel Dänzer wrote:
> The tearing isn't directly related to (the lack of) that. There was some
> discussion about it on this list a while ago.
OK, I went into the archives.
Oops, indeed, that was discussed recently.
Tearing is caused by writing to the video buffer at the same time it's
being output to the display device. Hence you get the top part of one
frame, and the bottom part of another one. It's as if you'd torn a page
in a flipbook and peeled part of it back. The solution is
double-buffering in the driver, or waiting for vertical blanking.
I am afraid that you have to wait until Keith or Eric fixes this
Intel did not release the documentation.
If I remember correctly, Keith
said that tearless video will be available after DRI rework.
Eric has made a few improvements in the textured video path
in the last week and fixing the remaining tearing and video output
property limitations are possible as well.
Oh well, Eric looks like a fine supplier for another pony.
even resisted a cheap nvidia card at the shop today
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