Asier Goikoetxea Yanci ([EMAIL PROTECTED]): > I have writen an application to scroll a text on a window (just like > kbanner screen saver but on a window). I provide different texts and > the program scrolls them one after the other quite smoothly.
Cool, I've been working on the same thing. > However, there is an issue that I didn't manage to solve, flickering. > I've been searching and I found that the flickering is caused because > the print is not synchronised with the vertical frecuency/signal (or > at least is what I understood). It seems that printing the text on the > screen/window when vblank is happening solves the problem of > flickering. And it seems that I have to use SYNC extension in order to > solve this problem. Am I right? Correct me please if I am wrong. I'm writing a paper on this topic where I discuss methods of refresh sync and polling the refresh when the application intends to draw at the refresh rate of the monitor, or close to it: http://scanline.ca/smooth/ If you want to email me off-list I can send you my code (headlines-0.2.tar.gz in that dir is an ok start, but I have some more generalized stuff I haven't yet released) and also discuss the methods in more detail. It would help me finish that paper :) > Well, the thing is that I have not clue on how to use SYNC extension, > not even if it would solve my problem. Any suggestion is wellcome. The SYNC extension as it currently exists won't help you. -Billy _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
