I'll pick gnome-calculator as an example since it shows stretched in
both Xenial and Yakkety.
The issue seems to be the appstream generator is making stretched
thumbnails and gnome-software / appstream-glib is choosing these over
the original images. For gnome-calculator (which shows the problem in
both Xenial and Yakkety) the dep11 data [1] gives:
>From
source-image:
height: 285
url:
g/gn/gnome-calculator.desktop/849e24a42d3d86f364e068fc3be7f680/screenshots/source/scr-1.png
width: 312
thumbnails:
- height: 702
url:
g/gn/gnome-calculator.desktop/849e24a42d3d86f364e068fc3be7f680/screenshots/1248x702/scr-1.png
width: 1248
- height: 423
url:
g/gn/gnome-calculator.desktop/849e24a42d3d86f364e068fc3be7f680/screenshots/752x423/scr-1.png
width: 752
- height: 351
url:
g/gn/gnome-calculator.desktop/849e24a42d3d86f364e068fc3be7f680/screenshots/624x351/scr-1.png
width: 624
- height: 63
url:
g/gn/gnome-calculator.desktop/849e24a42d3d86f364e068fc3be7f680/screenshots/112x63/scr-1.png
width: 112
The large thumbnails are distorted and should not be used/generated.
[1] /var/lib/apt/lists/archive.ubuntu
.com_ubuntu_dists_yakkety_main_dep11_Components-amd64.yml.gz
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Packages, which is subscribed to gnome-software in Ubuntu.
https://bugs.launchpad.net/bugs/1626494
Title:
Some app screenshots wrongly stretched in Ubuntu version of Gnome
Software
Status in gnome-software package in Ubuntu:
Triaged
Bug description:
Looking at Thunar in Gnome Software, the Ubuntu version of GS
stretches the screenshot, making it look ugly. Upstream apparently
doesn't do this and uses grey letterboxing. (See attached
screenshots.)
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-software
3.20.1+git20160617.1.0440874.ubuntu-xenial-0ubuntu1~16.04.1
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Sep 22 12:02:12 2016
InstallationDate: Installed on 2014-04-07 (899 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
SourcePackage: gnome-software
UpgradeStatus: Upgraded to xenial on 2016-08-04 (49 days ago)
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https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1626494/+subscriptions
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