Geez, what happens when I'm not looking for a minute ;) On Thu, 2001-10-18 at 23:58, Tom Rini wrote: > On Thu, Oct 18, 2001 at 02:07:11PM -0700, Nicolas Lopez wrote: > > On Thu, Oct 18, 2001 at 12:46:18PM -0700, Tom Rini wrote: > > > On Thu, Oct 18, 2001 at 12:25:09PM -0700, Nicolas Lopez wrote: > > > But does the iBook have enough VRAM to do DRI on even 640x480 at >16bpp? > > Um, yeah. [EMAIL PROTECTED] is less than a 1M framebuffer. There's 8M > > there. > > Yeah, but doesn't DRI need a whole lot more? You can run X at 1024x768 > at 24/32, but not w/ DRI. [EMAIL PROTECTED] w/ DRI is a go tho. Last I tried > anyhow. :)
The DRI needs twice w*h*bpp/8 (front and back buffer) plus w*h*16/8 (depth buffer). 8 MB is slightly too little for 1024x768x32, barely enough for 800x600x32, but there's not much left for textures. > > And I just refreshed my xfree86 source tree, r128_dri.c still says: > > case 8: /* 8bpp mode is not support */ > > case 15: /* FIXME */ > > case 24: /* FIXME */ > > xf86DrvMsg(pScreen->myNum, X_ERROR, > > "[dri] R128DRIScreenInit failed (depth %d not > > supported). > > " > > "Disabling DRI.\n", info->CurrentLayout.pixel_code); > > return FALSE; > > > > So it wouldn't even try if it did have the vram. Have you bothered looking further down? There's a case for 32... info->CurrentLayout.pixel_code is bits per pixel, so this code is slightly broken in this regard, but nevertheless DRI works in depth 24, 32 bpp. -- Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer XFree86 and DRI project member / CS student, Free Software enthusiast
