Re: [Qemu-devel] [PATCH] update server bits on vnc_update

[Lucas Meneghel Rodrigues]

On Sat, Jul 18, 2009 at 1:47 AM, Glauber Costa<address@hidden> wrote:
> Since the server/guest split in vnc architecture, we
> no longer update the server bits on large updates. Result
> is screen gets garbled, specially on scroll actions.
>
> I must admit I don't fully understand our vnc code, but after
> a careful reading, it seemed to me the proposed patch would fix
> it, and it indeed, works.
>
> Gerd, Anthony, please tell me what you think of this approach.
>
> This fixes the following bugs for me:
> https://bugzilla.redhat.com/show_bug.cgi?id=503156
> https://bugzilla.redhat.com/show_bug.cgi?id=507626
> https://bugs.launchpad.net/qemu/+bug/397212

Works for me as well. I've rebuilt the virt-preview repo rpms with
Glauber's patch and I don't have garbled VNC anymore.

Thanks for fixing this up, Glauber!

> Signed-off-by: Glauber Costa <address@hidden>
> CC: Gerd Hoffmann <address@hidden>
> ---
>  vnc.c |   10 ++++++++--
>  1 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/vnc.c b/vnc.c
> index de0ff87..acebdaf 100644
> --- a/vnc.c
> +++ b/vnc.c
> @@ -262,9 +262,8 @@ static inline int vnc_and_bits(const uint32_t *d1, const 
> uint32_t *d2,
>     return 0;
>  }
>
> -static void vnc_update(VncState *vs, int x, int y, int w, int h)
> +static void do_vnc_update(struct VncSurface *s, int x, int y, int w, int h)
>  {
> -    struct VncSurface *s = &vs->guest;
>     int i;
>
>     h += y;
> @@ -286,6 +285,13 @@ static void vnc_update(VncState *vs, int x, int y, int 
> w, int h)
>             vnc_set_bit(s->dirty[y], (x + i) / 16);
>  }
>
> +
> +static void vnc_update(VncState *vs, int x, int y, int w, int h)
> +{
> +    do_vnc_update(&vs->guest, x, y, w, h);
> +    do_vnc_update(&vs->server, x, y, w, h);
> +}
> +
>  static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h)
>  {
>     VncDisplay *vd = ds->opaque;
> --
> 1.6.2.2
>
>
>
>



-- 
Lucas Meneghel