Mark thanks for your help. I tryed to rewrite glide driver and it seems to be the right way.
Jaroslav On Friday 30 May 2003 21:17, Mark Vojkovich wrote: > It seems likely that this device was never intended for anything > other than video. You can probably run X on it with a shadow framebuffer. > See the glide driver. It renders to the 3Dfx Voodoo 1 and 2 boards > by putting the framebuffer in system memory and then copying rectangles > over to the real framebuffer using the Glide(tm) library. You could > have a shadowFB RefreshArea function that did the colorspace conversion > from RGB into YUV. > > Mark. > > On Fri, 30 May 2003, Jaroslav Vozab wrote: > > Hi, > > I try to implement xfree86 driver for one of IBM PPC based chips. > > Graphics of this chip is not based on RGB colorspace but on YUV > > colorspace and there are two planes one for Y and one for UV. I have no > > idea how to implement it. I can mmap the video memory but i have no idea > > how to describe how the data should be displayed. Is there any > > possibility to set a callback function that draws pixel? Or is possible > > to describe the format? Or is there any other possibilyty how to do it? > > > > Jaroslav > > > > _______________________________________________ > > XFree86 mailing list > > [EMAIL PROTECTED] > > http://XFree86.Org/mailman/listinfo/xfree86 > > _______________________________________________ > XFree86 mailing list > [EMAIL PROTECTED] > http://XFree86.Org/mailman/listinfo/xfree86 _______________________________________________ XFree86 mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xfree86
