Re: GGI Project Unhappy On Linux
Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
Fri, 27 Mar 1998 17:59:01 +0100 (CET)
On Fri, 27 Mar 1998, Pavel Machek wrote:
> > > > (Note BTW its arguable that soon not only text mode but all direct frame
> > > > buffer access will go out of fashion. Its an expensive slowing item that
> > > > adds cost and major complexity to the performance critical memory subsystem
> > > > on the video card).
> > >
> > > Erk! So what happens to blitting images to the screen?
> >
> > Dear graphics controller, there is a nice pixmap in main memory at
> > 0xD0A13C30, its 64x64 pixels square and in RGB888 format, please map it
> > to the 8bit mode colours you are in and dither if neccessary. If you'd be
> > kind enough to post me an interrupt when you've finished I'd be
> > greatful
>
> Well, imagine putting 8x16 blocks on screen (letters). You got
> interrupt for every character. That is not going to be too fast. (I
> assume that current fbcon layer is not able to work with such
> accelerated hw... :-( )
Yes it does! You have to provide your own putc routine. There's even a putcs
routine for multiple characters since drawing single characters is very slow on
some machines (e.g. on the Amiga).
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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