feat: Rewrite png metadata handling, new VRC metadata #377

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MrUnknownDE · 2026-04-05T16:18:22+02:00

MrUnknownDE commented

2026-04-05 16:18:22 +02:00

Originally created by @GroovyTeacup on 8/1/2025

PNG-specific functionality is now more generic/standalone so it shouldn't need to be looked at most of the time and the interface is simple enough if required.
Can now easily handle/iterate over multiple chunks of the same type, like iTXt.
With that now possible, VRChat metadata can now be parsed alongside VRCX metadata (VRC metadata will override vrcx for applicable fields on the assumption it's more "trustworthy")
Optimized calls to the bruteforce search for old LFS/screenshotmanager data by checking for a start-of-file chunk that doesn't exist unless its an older picture made by one of these mods. This ensures the somewhat expensive function is no longer run on every file

WIP

*Originally created by @GroovyTeacup on 8/1/2025* - PNG-specific functionality is now more generic/standalone so it shouldn't need to be looked at most of the time and the interface is simple enough if required. - Can now easily handle/iterate over multiple chunks of the same type, like iTXt. - With that now possible, VRChat metadata can now be parsed alongside VRCX metadata (VRC metadata will override vrcx for applicable fields on the assumption it's more "trustworthy") - Optimized calls to the bruteforce search for old LFS/screenshotmanager data by checking for a start-of-file chunk that doesn't exist unless its an older picture made by one of these mods. This ensures the somewhat expensive function is no longer run on *every* file WIP

MrUnknownDE closed this issue

2026-04-05 16:18:22 +02:00

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Reference: github/VRCX#377