On Tue, 9 Apr 2002, Keith Whitwell wrote: > Ian Romanick wrote: > > > > On Sat, Apr 06, 2002 at 09:42:36AM -0700, Brian Paul wrote: > > > Ian Romanick wrote: > > > > > > > > Also, I just noticed that when Maya starts up it logs the following message > > > > in its "script editor" windows. It repeats four times. > > > > > > > > // Warning: Unable to get OpenGL visual with a depth buffer, trying without // > > > > > > > > What would be the easiest way for me to figure out exactly what type of > > > > visual it is trying to get? > > > > > > Modify glXChooseVisual() to print the attribute tokens/values as the list > > > is parsed. It would be interesting to know what it's looking for. > > > > > > > > > > This may not be important because it only > > > > happens when I run w/a 16-bpp display. > > > > The issue is that Maya is requesting at least 23-bits of Z-buffer. In > > 16-bit mode, we only have 16-bits of Z-buffer, so it can't find a visual. > > On the Radeon, is depth bpp == color bpp a hardware limitation or just the > > way the drivers were done? > > Probably just the way it was done. It would be fairly easy to allow an > XF86Config option for zbuffer depth, but quite a bit more work to support 16 > and 32 bpp side-by-side.
We talked about this a bit at yesterday's IRC. The mach64 can only use a 16-bit depth buffer, even with a 32bpp framebuffer, so I'm also interested in this. I couldn't see a way to request a smaller buffer from the XFree framebuffer manager (currently we allocate a 32-bit depth buffer, but are only using 16-bit z-buffer depth). It looks like the utah-glx driver was able to accomplish this since it's managing it's own buffers. Most of the drivers seem to have a comment in the ScreenInit of the DDX driver about, "When we move to dynamic allocation of back and depth buffers...". Could anyone explain what the plan was regarding this? -- Leif Delgass http://www.retinalburn.net _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
