On Thu, 06 May 2021 13:05:58 +0300 Henry Jameson wrote:
> There's a similar bug report in ArchLinux:
> https://bugs.archlinux.org/task/67105
>
> Supposedly they had some custom patch for libpng that was causing
this and
> removing that helped. Dunno if debian has anything like this.
>
> I can confirm that downloading libpng binary from
> http://www.libpng.org/pub/png/libpng.html and running chromium with that
> library in LD_PRELOAD fixes the issue completely.
>
> --
> Best regards,
>
> HJ
>
>
>
>
I just looked into it; debian's libpng carries that same patch.
Specifically, libpng-1.6.37-apng.patch from
https://sourceforge.net/projects/libpng-apng/files/.
The request for upstream libpng to include the patch is at
https://sourceforge.net/p/libpng/feature-requests/16/, but upstream
libpng never merged it. Chromium bundles libpng without that patch, and
seems to have made APNGs work without needing to patch libpng. To fix
this bug, chromium should either use the bundled version of libpng, or
debian's libpng should drop libpng-1.6.37-apng.patch.
I'm curious what the libpng maintainers think?
