On Wednesday 22 November 2006 16:36, Jesse Chappell wrote: > Yes, the key to fast (efficient) scrolling is to use a pixel copying > routine (glCopyPixels is the GL equivalent) then draw only the new > data. The copying routines are hardware accelerated by the display > driver. Unfortunately, it turned out that SDL drawing on X11 is not hardware accelerated at all (which is a shame really), so there's not much I can do about that. As for GL, glCopyPixels seems to be very slow with most common drivers... Anyway here's version 0.2, using a textured quad for GL drawing, if possible. For now, this requires a fairly recent driver which supports the framebuffer objects extension, otherwise it will fall back to the old drawing method. http://das.nasophon.de/jack_oscrolloscope/ Dominic
