Am Mittwoch, 8. Januar 2003 17:46 schrieb Keith Whitwell: > Dieter Nützel wrote: > > Am Mittwoch, 8. Januar 2003 17:04 schrieb Keith Whitwell: > >>>What "clobbering" is allowed can be inferred from the GLX specification. > >>> If you overlook DBE for a second, I believe we are meeting the > >>>requirements of the spec, so I wouldn't say we're "broken". > >> > >>This isn't true. > >> > >>Consider when a diagonal line is drawn by Xlib across the active GL > >> window, with pages flipped. > >> > >>--> Xlib draws in the "back buffer" > >>--> Shadow copies the bounding box of the line to the front buffer, > >>including *all* of the backbuffer. > >> > >>What you really want is just a line to be drawn in the front buffer, but > >> in fact you get a whole lot of garbage with it. > >> > >>A common place things like this occur is in opaque window moves -- if you > >>move the 3d window when pages are flipped, its contents are replaced with > >>whatever's in the backbuffer. > >> > >>A solution to this is to get Xlib and GL to agree which is the front > >> buffer and always have Xlib draw into that & copy to the backbuffer. > > > > Then this must be the culprit for the massive 3D window flickring (mixing > > front and back buffer, but only when textures are involved, ipers but not > > gears) when I move the window around? > > Yes, though nothing to do with textures -- gears is just too fast to see it > flickering, whereas ipers is quite slow.
Gears is fast but not as fast as before on my dual Athlon SMP like several other 3D apps. Some interference with the great new native AMD 76x power management stuff. I have to disable it for further testing. U160: 2376 RPM (min = 1500 RPM, div = 4) CPU 0: 4115 RPM (min = 3000 RPM, div = 2) CPU 1: 4090 RPM (min = 3000 RPM, div = 2) System: +28.0°C (limit = +40°C, hysteresis = +37°C) sensor = thermistor CPU 1: +20.5°C (limit = +52°C, hysteresis = +47°C) sensor = 3904 transistor CPU 0: +23.5°C (limit = +52°C, hysteresis = +47°C) sensor = 3904 transistor -Dieter ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
