[Pkg-squeak-devel] Bug#763494: squeak-vm: Please change build dependency to libjpeg-dev (libjpeg-turbo transition)

[Niels Möller]

Ondřej Surý <ondrej at debian.org> writes:

> I have no idea if it fixes the #744289, but if the bundled library is
> the original libjpeg6b then it might.

I've now tested (after upgrading squeak-vm to version
"1:4.10.2.2614-1.1+b1"). jpeg files still don't work in scratch, and I
get no error messages.

To reproduce (with an English locale):

  Start scratch. For me, this displays a message
  Executing: /usr/lib/squeak/4.10.2-2614/squeakvm -encoding UTF-8 -vm-display-x11 -plugins /usr/lib/scratch/plugins/:/usr/lib/squeak/4.10.2-2614/ /usr/share/scratch/Scratch.image
  and then the scratch window appears.
  
  Click "Stage" on the right. In the middle, we get three tabs,
  including a "Backgrounds" tab.

  Select the "Backgrounds" tab.

  Click the "Import" button. A file selector appears.

  Select the "Indoors" folder and the file "party-room" (in the file
  system, that's
  /usr/share/scratch/Media/Backgrounds/Indoors/party-room.jpg), and
  click "Ok". We get a new entry in the list of backgrounds, but the
  thumbnail is an empty image.

  Interestingly, I do get a correct thumbnail for the party-room image
  in the file selector, but I guess the thumbnails are stored separately
  in scratchthumbs.db.
  
  For contrast, click the "Import" button again, and select
  Indoors/bedroom1 (corresponding to the file "bedroom1.gif"). We get a
  new entry in the list, with a correct thumbnail image, and since it is
  selected, we also get a larger version on the right as the stage
  background.

So something is still broken with jpg support in squeak-vm and/or
scratch. And I think backgrounds are a quite important feature in
scratch.
  
Maybe someone more familiar with smalltalk and squeak can cook up a
simpler jpeg test case.

Regards,
/Niels

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