https://bugs.winehq.org/show_bug.cgi?id=35428
faalagorn@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |faalagorn@gmail.com
--- Comment #3 from faalagorn@gmail.com --- I recently made a forum post about it and got pointed to this issue – the screenshots are unfortunately always scaled down to 1024 width – now that I know that, I always rescale them down to that resolution beforehand, so at least I can choose the scaling method on my PC and since the file size limit is only 600KB it often allows to upload in a higher quality.
Due to size restrictions I always uploaded JPGs instead of PNGs but at least it seems that PNG is an accepted format that stays PNG after upload, but since WineHQ adds its watermark (and scales down, unless you are aware of 1024 width limitation), the image have to be processed anyway. For already scaled down PNGs that should be lossless though if you optimized the image that gains will be lost, but for JPG that can result in further quality lost.
Mobygames stopped adding watermarks on their images and even proceed to remove them for existing images, so it's something to take into consideration, especially since if WineHQ logo changes, the old images retain old screenshots.
Either way, for the time being it would be nice to at least add the information about the 1024 width scaling – that way, knowing the resolution, uploader can either run the applicationf or screenshot on a lower resolution beforehand, or at least resize the image to more easily fit in the 600KB limit and/or choose the preferred scaling method.
Linking my post for clarity as well https://forum.winehq.org/viewtopic.php?f=11&t=29709&p=112880