[Qemu-devel] qemu-system-sparc video problem on 16 bit displays

[Qemu-devel] qemu-system-sparc video problem on 16 bit displays

[Juergen Lock]

Hi!

 I was made aware of this by a FreeBSD user, but i suspect the
problem is not specific to FreeBSD hosts:  If run on a 16 bit
display, qemu-system-sparc' video is messed up like shown here:
	http://img320.imageshack.us/img320/3807/qemusparckd1.png
(pink, and uses only half of the window's width...)  It looks okay
on 24 bit displays.

 Thanx,
	Juergen

Re: [Qemu-devel] qemu-system-sparc video problem on 16 bit displays

[WaxDragon]

I can confirm this happens under linux also.  Never thought to try 24bit.

On 8/9/06, Juergen Lock <qemu-l@jelal.kn-bremen.de> wrote:
> Hi!
>
>  I was made aware of this by a FreeBSD user, but i suspect the
> problem is not specific to FreeBSD hosts:  If run on a 16 bit
> display, qemu-system-sparc' video is messed up like shown here:
>         http://img320.imageshack.us/img320/3807/qemusparckd1.png
> (pink, and uses only half of the window's width...)  It looks okay
> on 24 bit displays.
>
>  Thanx,
>         Juergen
>
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>


-- 
< undrdawg> it was buggy and hung a lot

[Qemu-devel] Re: qemu-system-sparc video problem on 16 bit displays

[Anthony Liguori]

On Thu, 10 Aug 2006 00:32:20 +0200, Juergen Lock wrote:

> Hi!
> 
>  I was made aware of this by a FreeBSD user, but i suspect the
> problem is not specific to FreeBSD hosts:  If run on a 16 bit display,
> qemu-system-sparc' video is messed up like shown here:
> 	http://img320.imageshack.us/img320/3807/qemusparckd1.png
> (pink, and uses only half of the window's width...)  It looks okay on 24
> bit displays.

Looks you're telling QEMU that you've got a 16 bit buffer when it's really
a 32 bit buffer.

Perhaps we're mixing up bits-per-pixel with depth?

Regards,

Anthony Liguori

>  Thanx,
> 	Juergen

Re: [Qemu-devel] Re: qemu-system-sparc video problem on 16 bit displays

[WaxDragon]

On 8/9/06, Anthony Liguori <anthony@codemonkey.ws> wrote:
> On Thu, 10 Aug 2006 00:32:20 +0200, Juergen Lock wrote:
>
> > Hi!
> >
> >  I was made aware of this by a FreeBSD user, but i suspect the
> > problem is not specific to FreeBSD hosts:  If run on a 16 bit display,
> > qemu-system-sparc' video is messed up like shown here:
> >       http://img320.imageshack.us/img320/3807/qemusparckd1.png
> > (pink, and uses only half of the window's width...)  It looks okay on 24
> > bit displays.
>
> Looks you're telling QEMU that you've got a 16 bit buffer when it's really
> a 32 bit buffer.
>
> Perhaps we're mixing up bits-per-pixel with depth?
>
> Regards,
>
> Anthony Liguori
>
> >  Thanx,
> >       Juergen
>
>
>
>

Perhaps this in tcx.c?

    switch (ts->ds->depth) {
    case 32:
    f = tcx_draw_line32;
    break;
    case 24:
    f = tcx_draw_line24;
    break;
    default:
    case 8:
    f = tcx_draw_line8;
    break;
    case 0:
    return;
    }

WD
-- 
< undrdawg> it was buggy and hung a lot