Re: GGI Project Unhappy On Linux
Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 27 Mar 1998 00:11:52 +0000 (GMT)
> > 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
>
> OK, that sounds nice, but... my 1024x1024 image is in application VM,
> which is fragmented in physical RAM. Does this humble request include
> a page translation table? Or can the graphics chip access the CPUs MMU?
> Or are we stuck with pre-allocating "DMA buffers" and doing an extra
> copy?
Firstly you can say its lots of smaller blocks, secondly some AGP cards will
allegedly be able to do scatter gather. At this point please consult a real
graphics hardware guru not a passing reader of video card manuals and info ;)
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