Progressive JPEG decoded in lower resolution

[sophie-h]

I got a report of an image that is rendered correctly everywhere else (TM), but not with image-rs. I guess it's a zune-jpeg issues?

https://gitlab.gnome.org/-/project/27706/uploads/6c2ce998dcd935b9a5707489dd786236/IMG_20240620_193631_036_1600x1200.jpg

It looks like not all progressive decoding levels are done. But that's just a wild guess.

[Shnatsel]

This is what the zune-jpeg decoding result looks like - it basically becomes pixelated:

[eomanis]

Original reporter here.

I do not recall with certainty what application I used to downscale this photo to 1600x1200, but I think it was likely the Flatpak GIMP 3 Beta from the Flathub flathub-beta remote.

File modification and birth timestamps are 2024-06-26 18:53:50+00:00.

[eomanis]

Signed license declaration as "Creative Commons CC0 1.0 Universal" in case the image file should be used in a regression test:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

I hereby declare the following work I made, identified by its file size and checksum(s) as stated in this document, to be licensed as "Creative Commons CC0 1.0 Universal".

File name             IMG_20240620_193631_036_1600x1200.jpg
File size in bytes    488183
File SHA384 checksum  1df8a0a79faa2389aab75bc7b332fa414a8e892c7b5150be5e1c87d7241093531d0499939b13fd57b43b6c216e4e68f3
Creation time         2024-06-26 20:53:49.711665112 +0200

2024-12-22 / December 22, 2024
eomanis
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[etemesi254]

Looking into it

We limit decoders progressive passes to prevent oom so might be the cause

[etemesi254]

It seems like its a decoder issue.

Investigating it