Help about SDL abnormal color display in VNC viewer.
James Weatherall
jnw "at" realvnc.com
Wed Apr 9 17:12:01 2008
Hi Steve,
Yes, simply start your VNC Servers with whatever pixel format the broken
applications require.
Regards,
--
Wez @ RealVNC Ltd
> -----Original Message-----
> From: Dorland, Steve [mailto:steve.dorland "at" intel.com]
> Sent: 09 April 2008 16:43
> To: James Weatherall
> Cc: vnc-list "at" realvnc.com
> Subject: RE: Help about SDL abnormal color display in VNC viewer.
>
>
>
>
>
> Hi James,
>
>
>
> When an application does this, is there a fix or workaround?
> Two apps that have been brought to my attention here are
> firefox (in which all the links are red instead of blue) and
> xcmap (which comes up red - evidently it's supposed to be blue).
>
>
>
> Thanks,
>
> Steve.
>
>
>
>
>
> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of James Weatherall
> Sent: Tuesday, April 08, 2008 3:12 AM
> To: 'Alex Chen'; dongxiao.xu "at" gmail.com
> Cc: vnc-list "at" realvnc.com
> Subject: RE: Help about SDL abnormal color display in VNC viewer.
>
>
>
> Alex,
>
>
>
> I'm afraid that I can't find any such post to this mailing
> list. If the red
>
> & blue components are swapped in an application then that
> does invariably
>
> mean that the application is ignoring the actual format of
> depth-24 pixels,
>
> and assuming an RGB format, while Xvnc currently defaults to BGR (for
>
> historical reasons).
>
>
>
> Cheers,
>
>
>
> --
>
> Wez @ RealVNC Ltd
>
>
>
>
>
> > -----Original Message-----
>
> > From: vnc-list-admin "at" realvnc.com
>
> > [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Alex Chen
>
> > Sent: 08 April 2008 02:56
>
> > To: dongxiao.xu "at" gmail.com
>
> > Cc: vnc-list "at" realvnc.com
>
> > Subject: Re: Help about SDL abnormal color display in VNC viewer.
>
> >
>
> > Hi DongXiao,
>
> >
>
> > I have met a similar issue but I am not sure whether it is
>
> > exactly same.
>
> > please find "It seems SDL exchanges R & B channels, but turn
>
> > out VNC related" topic in the list, hope it could help you
>
> >
>
> > --Alex
>
> >
>
> > On 4/3/08, James Weatherall <jnw "at" realvnc.com> wrote:
>
> > >
>
> > > Paresh,
>
> > >
>
> > > I'm afraid that you are mistaken. What I described is the VNC
>
> > > Viewer's Low Colour feature, used by default for slow connections.
>
> > >
>
> > > The XRANDR extension affects the size of the X desktop, its
>
> > rotation,
>
> > > and in the latest spec the positions of physical display devices'
>
> > > viewports. It doesn't affect the X desktop's colours, so
>
> > I'm not sure
>
> > > why you think XRANDR is causing whatever "weird colours" you're
>
> > > seeing.
>
> > >
>
> > > What is the "VNC session window resize problem" that you refer to?
>
> > >
>
> > >
>
> > > --
>
> > > Wez @ RealVNC Ltd
>
> > >
>
> > >
>
> > > > -----Original Message-----
>
> > >
>
> > > > From: paresh masani [mailto:masaniparesh "at" gmail.com]
>
> > > > Sent: 03 April 2008 16:19
>
> > > > To: James Weatherall
>
> > >
>
> > > > Cc: Xu Dongxiao; vnc-list "at" realvnc.com
>
> > > > Subject: Re: Help about SDL abnormal color display in
> VNC viewer.
>
> > > >
>
> > > > Hi,
>
> > > >
>
> > > > This happens for me as well if i open my VNC session of other
>
> > > > monitor which will have monitor size different. It is
>
> > showing weird
>
> > > > colors.Could anyone suggest regarding this issue? Is it
>
> > related to
>
> > > > 24 bit color problem?
>
> > > >
>
> > > > I think this is happening because of the VNC session
>
> > window resize
>
> > > > problem and current VNC dont have XRANDR supports.
>
> > > >
>
> > > > Thanks,
>
> > > > Paresh
>
> > > >
>
> > > >
>
> > > > On 4/3/08, James Weatherall <jnw "at" realvnc.com> wrote:
>
> > > >
>
> > > > Hi again,
>
> > > >
>
> > > > Sorry - one other thing I forgot to mention is that
>
> > if you are
>
> > > > connecting to
>
> > > > your VNC Server over a slow link then it will use
> a reduced
>
> > > > colour level,
>
> > > > which may lead to colours being approximated by a
>
> > more limited
>
> > > > palette. You
>
> > > > should configure your VNC Viewer to use "full-colour"
>
> > > > if you need to see
>
> > > > exact colours.
>
> > > >
>
> > > > Regards,
>
> > > >
>
> > > > --
>
> > > > Wez @ RealVNC Ltd
>
> > > >
>
> > > >
>
> > > > > -----Original Message-----
>
> > > > > From: Xu Dongxiao [mailto:dongxiao.xu "at" gmail.com]
>
> > > > > Sent: 03 April 2008 14:57
>
> > > > > To: James Weatherall
>
> > > > > Cc: vnc-list "at" realvnc.com
>
> > > > > Subject: Re: Help about SDL abnormal color
> display in VNC
>
> > > > viewer.
>
> > > > >
>
> > > > > Hi, James,
>
> > > > > Thanks for your reply!
>
> > > > > I have put the picture on this website:
>
> > > > > http://bbs.nju.edu.cn/file/P/prece/color.jpg
>
> > > > > I also swap the red color and blue color on
> the above
>
> > > > > image, but the color is still not correct.
>
> > > > >
>
> > > > > Best Regards,
>
> > > > > Xu Dongxiao
>
> > > > _______________________________________________
>
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>
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>
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>
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>
> > > >
>
> > > >
>
> > > >
>
> > > >
>
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>
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>
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>
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>
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>
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>
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