jeff wrote: > > On Friday 16 November 2001 00:08, Erik Steffl wrote: > > jeff wrote: > > > On Thursday 15 November 2001 23:05, Erik Steffl wrote: > > > > jeff wrote: > > > > > xscreensaver runs fast and looks great in 'windowed' (even maximized) > > > > > mode but it's _really_ slow and yucky in fullscreen mode. > > > > > > > > > > hardware is a penitum iii, voodoo 3/200 AGP and 128 mb ram > > > > > > > > > > kernel is 2.4.14 w/DRI and voodoo compiled in > > > > > > > > openGL xscreensaver hacks or all of them? > > > > > > what's the diff? for instance, i run bubble3d in a window and it looks > > > groovy. i run it fullscreen and it's slower than cold molasses... > > > > openGL screensavers use DRI, the other screensaver only use 2d > > acceleration that is provided by X server. Depending on which > > screensavers do not work you can start to investigate one thing or > > another. > > > > I guess you are talking about openGL stuff since bubble3d uses openGL. > > Just to verify: even if you maximize window (so that it is practically > > on the full screen) it is smooth, as opposed to fullscreen which is > > choppy, right? > > ya ya...maximized looks fine but when, say, the screensaver naturally starts > up, the opengl stuff (bubble3d) is really slow. really slow. :) i don't > really care about screensavers mind you...i'm just trying to figure out why > it would do that...i want to develop my own opengl programs and something > silly like this would give me headaches for days. :)
well, try some simple program and see what it tells you (inside, when you switch to fullscreen, there are some functions that give you capabilities etc. you might be able to figure out whether it uses software rendering and why). if you don't know how to start see e.g. http://nehe.gamedev.net/ (I am going through these right now, fairly good, clean and understandble), or check out opengl.org for other tutorials/docs/examples etc. I have no idea why would it use dro in window and software rendering in fullscreen mode... erik
