SUMMARY Some PDF files are rendered "incorrectly" or rather on a very difficult way for us to read them. STEPS TO REPRODUCE 1. Open a PDF file with these characteristics. 2. See how it is pretty much unreadable. 3. See comparisons here: Default PDF viewer from Linux Mint: https://images2.imgbox.com/bd/8b/qFzQQ3cP_o.png Okular: https://images2.imgbox.com/35/e0/SiEpq6OO_o.png Default PDF viewer: https://images2.imgbox.com/6d/44/0Cf4ul3p_o.png Okular: https://images2.imgbox.com/70/bc/uM6JJmUR_o.png OBSERVED RESULT PDF's are rendered incorrectly. EXPECTED RESULT Correct rendering so as to be able to read them. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Linux Mint 20.3 Cinnamon. KDE Plasma Version: -. KDE Frameworks Version: 5.68.0. Qt Version: 5.12.8. xcb window system. ADDITIONAL INFORMATION Wrong rendered files are provided for reference and testing if needed: aHR0cHM6Ly9tZWdhLm56L2ZpbGUvTmlGV0FBSWEjU09xZTgtdmJUSm02YWVETkQyMU1GU3pHcWdabnl1R2tuS2xyX0JsbVA5MA== aHR0cHM6Ly9tZWdhLm56L2ZpbGUva2lrMjFTWUEjd2xYUFlRQXNQYjdwckN1Umdvdk9jVUt1NE1FMFdPUmx2NUdPUlkyOWh2aw== (base64).
Without files this is not actionable.
(In reply to Albert Astals Cid from comment #1) > Without files this is not actionable. The files are provided at the end.
You can add links you know, there's no need to be fancy and hide links in base64, just makes our life harder.
We do not do pdf rendering ourself, poppler does, you can go and file a bug at https://poppler.freedesktop.org/ but let me tell you this is 99% unfixable because it's not really a bug, those PDF files are scanned images, and contain LOTS OF NOISE, see a zoomed section here https://i.imgur.com/UaKtRx2.png When less zoomed the rendering engine has to decide what to do with all those "random" dots, and well it seems some engines do something you like better and some something you like worse. As an example try firefox, at least here at 100% it's acceptable https://i.imgur.com/Dfm0feQ.png but at 110% looks really bad https://i.imgur.com/jSciNYl.png
(In reply to Albert Astals Cid from comment #3) > You can add links you know, there's no need to be fancy and hide links in > base64, just makes our life harder. Had not seen the field, sorry, my bad. (In reply to Albert Astals Cid from comment #4) > We do not do pdf rendering ourself, poppler does, you can go and file a bug > at https://poppler.freedesktop.org/ but let me tell you this is 99% > unfixable because it's not really a bug, those PDF files are scanned images, > and contain LOTS OF NOISE, see a zoomed section here > https://i.imgur.com/UaKtRx2.png When less zoomed the rendering engine has to > decide what to do with all those "random" dots, and well it seems some > engines do something you like better and some something you like worse. > > As an example try firefox, at least here at 100% it's acceptable > https://i.imgur.com/Dfm0feQ.png but at 110% looks really bad > https://i.imgur.com/jSciNYl.png I see what you mean. I guess it does depend on the zoom, so there's not much to do. Guess I'll file the bug anyways just in case. Thank you for the help and explanation!