Re: Amaya 2.4 linux bug

> Amaya 2.4 linux bug
>
> From: Keith Hopper (kh@waikato.ac.nz)
> Date: Thu, Mar 30 2000
>
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> Date: Thu, 30 Mar 2000 21:31:02 -0500 (EST)
> From: Keith Hopper <kh@waikato.ac.nz>
> To: www-amaya@w3.org
> Message-ID: <49a7aeaf09kh@waikato.ac.nz>
> Subject: Amaya 2.4 linux bug
>
> Greetings,
>      I have a Compaq Presario 1260 laptop with 160Mbytes of memory and an
> 18Gbyte hard disc.  At present it dual boots either Windows 2000
> Professional or linux 2.2.5-15 (19 April 1999) i586.
>
>      I have both the 'NT' and linux versions of Amaya 2.4.  Amaya works
> very happily in the Windows 2000 Professional environment.  The display is
> exactly as expected.
>
>      Unfortunately under linux all images, whether jpeg, gif or png are
> badly corrupted into 4/5 pixel square blocks (giving a striped effect)
> which enable one to vageuly recognise the image (if one knows what it is
> supposed to be).
>
>      It is the only program 'common' to both OSs which corrupts images
> (mind you it is also true to say that no other program corrupts images
> under either OS).
>
>      Having seen some comments on other bugs which may be library related,
> the libc in use is version 6 (libc.so.6).  I have tried both the tar/zipped
> version of 2.4 for linux and, in case the archive was corrupted, also the
> rpm version.  There is no difference. The problem also appears to be
> independent of which window manager is in use.
>
>      I have even tried to compile the source, but could not for lack of an
> Xm (?) library. Could this be related to the problem??  Amaya does not,
> however, complain about anything being missing!
>
>        Keith Hopper
>
> --
> City Desk
> Waikato University
> [PGP key available if desired]
>
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Hello
I had the same problem using Amaya V3.2.1 (Linux) on a screen
with a TrueColor visual of depth 24. There seems to be an error
in thotlib/image/gifhandler.c, procedure MakeImage.  The case where
depth is 24 and the ximage also has 24 bits per pixel ist not handled
correctly, instead, 32 bits per pixel are always sent. This gives the "stripe
effect". I made a hack there, just skipping the unnecessary byte and it
worked fine.

Walter

--
Walter Bächi
mailto:wbaechi@acm.org