I finally figured out what the "line" in my video is during movement. Video tear or image shear its called. And on a software rotated screen it shows up as a big gnarly stair step across the diagonal of the video window. The only cure I saw listed in all my research so far is syncing up with the vertical retrace. Which X4 currently dosen't support. (At least not to a client program) A few of the drivers for cards do have some sort of sync when using Xv but I didn't see my S3 savage listed. So I hacked the software rotate routine of the savage driver to wait for a VSync before doing the rotate. The result was zero shear but the damn server was so slow it was almost unuseable. I was about to call it a night when I larked on the idea that if instead of syncing _every_ update I just synced every few updates I might be able to mask the shear. Turns out I was right. Adjusting my sync wait to every 3 or 4 updates effectively hides the shear. Yet still allows the server to operate in a reasonably timely manner. There is a little bit of lag and the video drops frames but it looks good. Which is the really important part. So now that I know the problem and have have a brutal ugly hack to work around it. What's the lists view on the "Right" TM way to get rid of shear? -- Richard A. Smith Bitworks, Inc. rsmith@xxxxxxxxxxxx 501.846.5777 Sr. Design Engineer http://www.bitworks.com
