I'm using SDL to write a program. If I use the standard X11 graphics driver all is fine. However, if I set SDL to use the DGA driver as opposed to the standard X graphics driver, and in addition instruct SDL to use page flipping (as opposed to simply blitting from an off screen surface to the video memory each frame), the mouse cursor becomes invisible. Obviously this is partially to do with SDL as well as XFree86, but given that SDL is nothing more than an API layer to calls on the relevant drivers provided by other systems (in this case XFree86) I'm not surprised that noone on the SDL mailing list could tell me where my problem lies. Here is a summary of different combinations of settings and the different results they cause: - Standard X11 driver (implying software display surface and no page flipping): No problems. - DGA driver with software surface and no page flipping: No problems. - DGA driver with hardware surface and no page flipping: Display flickers wildly (to be expected), the mouse cursor also flickers a lot and is invisible more often than not, but nonetheless it is definitely there. - DGA driver with hardware surface and page flipping: Mouse cursor totally invisible - DGA driver with software surface and page flipping Impossible. So I guess that page flipping is somehow overwriting the cursor, but this is low level enough that simply looking through the SDL source code isn't really providing any answers. Could anyone provide any sort of pointers? Even just a brief (and simplified) explanation of how page flipping and mouse cursor work with DGA so I might know where to start looking for the solution? Thanks, James _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
