Hi all, I get a strange phenomenon using the XV texture adapter in YV12 format on my 945G hardware and a 2.7.0 xf86-video-intel driver.
I fill a rectangle with many 1 pixel-high horizontal lines. Odd lines are black and even lines are white. I send this rectangle using XVShmPutImage to a window with the same size so that no scaling occurs. I would expect to see the black/white horizontal lines pattern. But I get a uniformly grey rectangle! Same phenomenon appears on either VGA, DVI or CVBS-TV monitors: it doesn't seem to be monitor/video encoder issue-related. I also saw that on much older drivers. Maybe it has always been this way. Notes: 1) When the output window is one pixel higher(upscaling) or one pixel shorter(downscaling) than the source rectangle, I do see the expected pattern, but with some scaling distortion (as I expected). 2) Opening a bitmap or .jpeg with the same pattern with an image viewer (GIMP), everything is fine. The phenomenon seems to be Xv-specific. 3) With the XV overlay adapter, if the pattern has the same size as the window, I do get all lines but with an unexpected scaling distortion. If the pattern is one pixel higher than the window (downscaling case), I do get the same phenomenon as when the texture adapter is used with no scaling. There seems to be a skew of 1 pixel on the overlay adapter vs. the texture one. Is this a known issue? Should I enter this into Bugzilla? Hugo Jacques This electronic message may contain proprietary and confidential information of Verint Systems Inc., its affiliates and/or subsidiaries. The information is intended to be for the use of the individual(s) or entity(ies) named above. If you are not the intended recipient (or authorized to receive this e-mail for the intended recipient), you may not use, copy, disclose or distribute to anyone this message or any information contained in this message. If you have received this electronic message in error, please notify us by replying to this e-mail. _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
