[Vm-dev] Fwd: [Pkg-squeak-devel] Bug#744289: scratch: Impossible importing or using jpeg files

Mon Apr 14 01:30:56 UTC 2014

Thanks Bert,

I tried installing a squeakvm with apt-get on my Ubuntu laptop. I'm assuming
this is probably the same as, or derived from, a Debian build. That VM exhibits
the problem described below, i.e. the plugin loads into Squeak but JPEG images
cannot be displayed.

With a standard interpreter VM from squeakvm.org, there is no problem. I also
compiled an interpreter VM in 64 bit mode using the standard Cmake build system
from squeakvm.org, and this also works without problems (so it is not a 64-bit
issue).

This suggests that the problem is somehow specific to the Debian build, but
I can't say what the cause might be.

I'll note also that the Debian 64-bit build of squeakvm is not suitable for
use with Scratch, because it includes at least one plugin (the CameraPlugin)
that currently works only when compiled for 32-bits (again I am assuming
that my Ubuntu download is really coming from Debian, hope I have that right).

I am CCing Miriam and Jos? Luis on this. I'm sorry I cannot see the cause
of the problem, but maybe knowing that it works properly on a standard
squeakvm Cmake build will help.

r.e. use of old libjeg sources: Yes it would be nice if someone updated the
Squeak JPEGReaderPlugin to use up to date libraries. As far as I know, nobody
is working on that right now, but a volunteer would be welcome. In the mean
time, the current source base seems to work acceptably for Squeak and Scratch.

Dave

On Sun, Apr 13, 2014 at 12:21:27PM -0700, Bert Freudenberg wrote:
>  
> Begin forwarded message:
> 
> > From: Jos? Luis Redrejo Rodr?guez <jredrejo at debian.org>
> > Subject: Re: [Pkg-squeak-devel] Bug#744289: scratch: Impossible importing or using jpeg files
> > Date: 12. April 2014 10:22:30 GMT-7
> > To: Miriam Ruiz <miriam at debian.org>
> > Cc: pkg-squeak-devel at lists.alioth.debian.org
> > 
> > mmm, I don't think compiling squeak-vm against the ancient libjpeg
> > sources bundled with squeak sources instead system libjpeg is a good
> > idea.
> > Instead of it, the JPEGReaderPlugin should be fixed to work correctly
> > with a modern jpeg library, but I don't feel with the  needed time
> > and/or knowledge to fix that currently. I'm afraid I've forgotten most
> > of my Smalltalk skills in the last years :(
> > 
> > Regards.
> > Jos? L.
> > 
> > 2014-04-12 18:22 GMT+02:00 Miriam Ruiz <miriam at debian.org>:
> >> Hi!
> >> 
> >> I've received this bug report for Scratch, but according to what is
> >> said in the forums of the Raspberry Pi device, it might belong to
> >> squeak-vm instead.
> >> 
> >> Any thoughts about it?
> >> 
> >> Thanks,
> >> Miry
> >> 
> >> 
> >> 
> >> ---------- Forwarded message ----------
> >> From: gea <geaplanet at yahoo.es>
> >> Date: 2014-04-12 16:16 GMT+02:00
> >> Subject: Bug#744289: scratch: Impossible importing or using jpeg files
> >> To: Debian Bug Tracking System <submit at bugs.debian.org>
> >> 
> >> 
> >> Package: scratch
> >> Version: 1.4.0.6~dfsg1-5
> >> Severity: normal
> >> 
> >> Dear Maintainer,
> >> 
> >> In the last versions of Scratch it is impossible to import jpeg files.
> >> With png works perfectly, but you find problems with jpeg. The program doesn't
> >> complain in any way but after you select an image jpg (for example in
> >> backgrounds) to use it, it is like if you were did not anything.
> >> 
> >> I think something is missing, perhaps the jpeg plugin, because I remember there
> >> was one in 1.3 version, but it is not present in 1.4.
> >> 
> >> 
> >> Thanks in advance.
> >> 
> >> 
> >> 
> >> -- System Information:
> >> Debian Release: wheezy/sid
> >>  APT prefers unstable
> >>  APT policy: (500, 'unstable')
> >> Architecture: i386 (i686)
> >> 
> >> Kernel: Linux 3.10.1-picaros (SMP w/4 CPU cores)
> >> Locale: LANG=es_ES.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8)
> >> Shell: /bin/sh linked to /bin/dash
> >> 
> >> Versions of packages scratch depends on:
> >> ii  libgtk2.0-bin           2.24.22-1
> >> ii  shared-mime-info        1.0-1+b1
> >> ii  squeak-plugins-scratch  1.4.0.2~svn.r83-1
> >> ii  squeak-vm               1:4.10.2.2614-1
> >> 
> >> scratch recommends no packages.
> >> 
> >> Versions of packages scratch suggests:
> >> ii  pulseaudio  4.0-6+b1
> >> 
> >> -- no debconf information
> >> 
> >> 
> >> ---------- Forwarded message ----------
> >> From: Miriam Ruiz <miriam at debian.org>
> >> Date: 2014-04-12 17:36 GMT+02:00
> >> Subject: Re: Bug#744289: scratch: Impossible importing or using jpeg files
> >> To: gea <geaplanet at yahoo.es>, 744289 at bugs.debian.org
> >> 
> >> 
> >> It might be related to the Squeak VM over which Scratch is executed,
> >> but I need to check it:
> >> 
> >> ?Me and Tim discussed this, and I've found a fix. The issue is due to
> >> the Debian package inheriting a patch from the original Debian
> >> packager making it link against the system libjpeg (rather than the
> >> rather ancient libjpeg bundled in the squeak-vm sources). For some
> >> reason, it seems squeak-vm isn't happy working with the newer libjpeg,
> >> so I've removed that patch and it all seems well. I'll post here when
> >> the updated squeak-vm is added to the repository, which should be
> >> tomorrow.? ( http://www.raspberrypi.org/forums/viewtopic.php?f=77&t=15583&start=25
> >> )
> > 
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