On Mon, Dec 10, 2001 at 05:53:32PM -0800, Gareth Hughes wrote: > On Mon, Dec 10, 2001 at 05:33:09PM -0800, Philip Brown wrote: > > ... > > But... isnt there a straightforward mmap type way to access the RAM on > > board the card, then? > > Or is it usually "load the data to the aperture, then copy it > > into card-local RAM from there" ? > > [or via the "drmDMA" stuff, I suppose?] > > Why do you want to touch the framebuffer (video memory, that is)? > That's one way to make your 3D graphics go really slowly...
I dont know... I'm new at all this :-) I just figured that since it only takes about 8 megs of RAM to hold all the pixels for high-res 24-bit displays, then if a card has 32 megs of RAM or higher, then programs have to be doing something interesting with the rest of the ram. I thought under 2d, it gets used for sprites, and other various cached pixmaps. So in 3d, it got used to store textures or something. So I'd better know how to enable access to it, if I want to implement DRI on my platform. > AGP was designed to let the graphics processor pull data from system > memory, instead of having the CPU push data out. Good to know ;-) _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
