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A new PNG spec

(www.programmax.net)
615 points bluedel | 1 comments | 24 Jun 25 13:01 UTC | HN request time: 0.199s | source
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joshmarinacci ◴[25 Jun 25 15:55 UTC] No.44378719[source]▶
A fun trick I do with my web based drawing tools is to save a JSON representation of your document as a comment field inside of a PNG. This way the doc you save is immediately usable as an image but can also be loaded back into the editor. Also means your downloads folder isn’t littered with unintelligible JSON files.
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1. osetnik ◴[25 Jun 25 18:52 UTC] No.44380678[source]▶
> save a JSON representation of your document as a comment field inside of a PNG

Can you compress it? I mean, theoretically there is this 'zTXt' chunk, but it never worked for me, therefore I'm asking.