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A new PNG spec

(www.programmax.net)
616 points bluedel | 3 comments | 24 Jun 25 13:01 UTC | HN request time: 0.451s | source
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LeoPanthera ◴[25 Jun 25 05:06 UTC] No.44373778[source]▶
> I know you all immediately wondered, better compression?. We're already working on that.

This worries me. Because presumably, changing the compression algorithm will break backwards compatibility, which means we'll start to see "png" files that aren't actually png files.

It'll be like USB-C but for images.

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mrheosuper ◴[25 Jun 25 06:20 UTC] No.44374139[source]▶
Does usb-c spec break backward compatibility ?, a 2018 macbook work perfectly fine with 2025 usb c charger
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1. techpression ◴[25 Jun 25 06:34 UTC] No.44374198[source]▶
I don’t know if it’s the spec or just a plethora of vendors that ignores it, but I have many things with a USB-C port that requires USB-A as source. USB-C to A to C works, yay dongles, but not just C to C. So maybe it’s not really breaking backwards compatibility, just a weird mix of a port and the communication being separate standards.
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2. mrheosuper ◴[25 Jun 25 06:41 UTC] No.44374252[source]▶
because those usb-c ports do not follow the spec. If they had followed the spec from 1st day there would be no problem even now.
3. fragmede ◴[25 Jun 25 07:10 UTC] No.44374411[source]▶
it's vendors just changing the physical port but not updating the electronics. specifically, a 5.1kΩ pull-up resistors on the CC1 and/or CC pins is needed on the host (was usb-a) side in order for the c to c cable to work.