tl;dr: AppStream builder will reject AppData screenshots smaller than 312x175. If you want things to be pixel-crisp and your application ships only one screenshot use 752x423. If you've got multiple screenshots use 624x351, or integer multiples thereof. You can still ship random sized screenshots bigger than 312x175 and we'll pad them out to the right size and shape, but choosing a 16:9 resolution makes everything look consistent in the software center. If you think 312x175 is being too strict, you really need to have a look at this: http://alt.fedoraproject.org/pub/alt/screenshots/f22/624x351/proofgeneral-4d9bd746838746355151f75f38e3ac4c.png -- I'm considering making 624x351 the smallest screenshot size allowed for F22/F23 although this may be too strict at this stage. Also, if you need to show the desktop background (e.g. for gimp, where you want to show multiple windows at once) use an alpha channel as the background. This allows gnome-software to composite in the current users desktop when we show it before it's installed. I've emailed most of the maintainers this affects privately, although you can check your app by looking at this commit to the logs: https://github.com/hughsie/createrepo_as_logs/commit/42e4c078a8a8bd882d297862e5868372fc8a58b1 -- Thanks. Richard -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
