Messages in this thread | | | Date | Sat, 28 Mar 1998 16:47:47 +0100 (MET) | From | Geert Uytterhoeven <> | Subject | Re: GGI Project Unhappy On Linux |
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On Fri, 27 Mar 1998, Erik Andersen wrote: > On Fri, Mar 27, 1998 at 05:50:42PM +0100, Geert Uytterhoeven wrote: > > On Thu, 26 Mar 1998, Pavel Machek wrote: > > > How does fbcon work with hardware acceleration? [Once we solve > > > acceleration issue somehow, we can get rid of GGI and use fbcon > > > instead. But - I'm not sure if such thing even can be done. With > > > cards having critical registers neer non-critical ones :-( ] > > > > >From user space, the X server mmaps the MMIO registers. > > > > For text console acceleration (mainly scrolling), the kernel knows how to do > > simple blits for some chipsets. If no blit routines are available, it will use > > the CPU. > > Hmm. Could fbcon be made to work _with_ libggi? That way the
That's perfectly possible.
> framebuffer's drawing and acceleration code could stay in the userspace > libggi library -- not in the kernel. This move to a userspace libggi > could also move the "blits for some chipsets" code already in the kernel > out to userspace as well, so the kernel gets to use the nice, safe, sane > svga card support from the ggi folks, the ggi folks stay happy because > the Linux world finally apprecieates them, the X server folks get to > focus on X windowing things (instead of graphics card support) because > ALL Linux targets are just framebuffers, and Linus stays happy because > the device abstraction stays the same as it is now.
People actually started working on a frame buffer device library, but it seems the project died.
Greetings,
Geert
-- Geert Uytterhoeven Geert.Uytterhoeven@cs.kuleuven.ac.be Wavelets, Linux/{m68k~Amiga,PPC~CHRP} http://www.cs.kuleuven.ac.be/~geert/ Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium
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