On Tue, 2 Jul 2002, Lawrence Lee (Shanghai) wrote:
> hi,all
> I'm studying the Graphics Card Driver in xwindow. I'm very confused with
> DGA(direct Graphics Architecture). Why an application needs DGA?Is DGA more
> faster? Like set mode, why xfree86 provides the DGA method?
> Thanks
DGA is an extension to allow the driver to essentially switch
to another VT and leave the graphics hardware initialized so a
client can render to the framebuffer directly and all by itself.
It was intended as a sort of replacement for svgalib which was
struggling to get hardware supported at the time, while XFree86 had
fairly good driver coverage. I consider it to be a legacy feature
which is deprecated. The existence of DGA complicates the driver
somewhat.
Mark.
_______________________________________________
Render mailing list
[EMAIL PROTECTED]
http://XFree86.Org/mailman/listinfo/render
