Save a pdf with inverted colors? (lemmy.world)

submitted 1 day ago by Override4414@lemmy.world to c/opensource@lemmy.ml

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Is there any way I can convert my PDF into a dark mode version without converting it into images first and invert that image and combine them, instead simply invert every element in the PDF and make it dark (preserving the original text and hyperlinks). appreciate any help!

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[-] roflo1@feddit.nl 15 points 1 day ago* (last edited 1 day ago)

I don’t remember where I got this. I jotted it down in my notes. (Sorry to whoever was the original author for not giving credit)

gs -o inverted.pdf -sDEVICE=pdfwrite -c "{1 exch sub}{1 exch sub}{1 exch sub}{1 exch sub} setcolortransfer" -f original.pdf

Edit: this might well be the original post I found: https://stackoverflow.com/a/30287097

this post was submitted on 12 May 2025

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