nanogui: Images resolution
Subject:
Re: Images resolution
From:
Rosimildo daSilva ####@####.####
Date:
28 Jan 2000 04:31:49 -0000
Message-Id: <200001280421.UAA28640@www1.xoommail.com>
Chris Johns wrote:
> Rosimildo daSilva wrote:
> >
> > "Greg Haerr" wrote:
> > > : I have looked at:
> > > :
> > > : + Linux SVGA
> > > : + GRX
> > > :
> > > : graphics library last night.
> > > :
> > > : They're somewhat large, but possible of being ported to RTEMS.
> > > : If anybody with more "graphics" experience than me,
> > > : could post some pros and cons of each library, I would appreciated.
> > > :
> > > : I've got the impression that the Linux SVGA would be easier to port.
> > >
> > > The GRX library runs on top of DOS, which is closer to the hardware.
> > > The SVGAlib library is based mostly as a user mode app, and probably
> > > requires mmap(), right?
> > >
> > > Greg
> >
> > Yes, but it is easy to "emulate" this call. IIRC, RTEMS already
> > supports it. RTEMS being a POSIX based RTOS "match" better with
> > Linux code.
> >
>
> I do not think POSIX is something which extends to this level. RTEMS
> also have other API's which people use and need to be supported.
>
> RTEMS does not have an mmap call. Are you going to add an mmap call ?
>
Not at this point. Unless we as community feel that there is
need for such a call.
At this point I am trying to edudate myself about the possibilities
that we have out there.
> > I was just wondering about the benefits of porting either one in the
> > long run.
> >
> > + which one has large development community
> > + availability of drivers
> > + applications
> >
> > How about Linux Frame Buffer ( FB ) ?
> > Is there any advantage of it over SVGA ?
> >
>
> Please consider Linux code very carefully. Code which is GPL cannot be
> included in RTEMS.
Thanks for the advise.
>
> Is it possible to have the RTEMS parts which are specific to the PC
> Board Support Package (BSP) defined under RTEMS_PC rather than just
> RTEMS ?
Absolutely. Please advise how you'd think it should be,
and I'll try to adjust for *our* needs.
Chris,
I know you contribute a lot for the RTEMS community,
So, are you using MicroWindows with RTEMS, or you did not
have a chance to try it out. ?
Rosimildo.
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