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A new PNG spec

(www.programmax.net)
614 points bluedel | 1 comments | 24 Jun 25 13:01 UTC | HN request time: 0.262s | 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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speps ◴[25 Jun 25 18:39 UTC] No.44380543[source]▶
Macromedia Fireworks did it 20 years ago, the PNG was the default save format. Of course, it wasn’t JSON stored in there…
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1. usef- ◴[25 Jun 25 22:08 UTC] No.44382249[source]▶
I was going to say the same thing. It was nice as their native save format could still be opened anywhere.

But you did need to remember to export if you didn't want the extra fields increasing the file size. I remember finding fireworks pngs on web pages many times back then.