JPEG XL FileType (11-30-2024)

[null54]

This plugin allows JPEG XL images to be loaded and saved using libjxl.

 

The plugin only supports single frame images, animated images will generate an error when loading.

 

I strongly recommend you save your work in another format before exporting to JXL using this plugin.

If libjxl encounters an unexpected error it may cause paint.net close without warning.

 

Compatibility: 5.1+

 

Installation:

 

1. Close Paint.NET.
2. Place JpegXLFileType.dll, JpegXLFileTypeIO_ARM64.dll and JpegXLFileTypeIO_x64.dll in the Paint.NET FileTypes folder which is usually located in one the following locations depending on the Paint.NET version you have installed.

  Classic: C:\Program Files\Paint.NET\FileTypes    
  Microsoft Store: Documents\paint.net App Files\FileTypes

  Portable: <Paint.NET folder>\FileTypes

3. Restart Paint.NET.

4. The filetype should now be available as the "JPEG XL" item in the open and save dialogs.

 

Download: JpegXLFileType.zip

 

Source Code: https://github.com/0xC0000054/pdn-jpegxl

[mdnava]

Greatly appreciated!

 

Do you think metadata preservation (EXIF, XMP) will be possible in the future?..

Edited August 31, 2022 by mdnava

[null54]

34 minutes ago, mdnava said:

Do you think metadata preservation (EXIF, XMP) will be possible in the future?..

 

It should be once libjxl version 0.7 is released and available in vcpkg.

According to the libjxl release notes on GitHub, the EXIF and XMP metadata API was added in the libjxl version 0.7 release candidate.

[null54]

Release version 1.0.1.

Changes:

• Fixed lossless encoding
• Reduced memory usage when decoding

[0.NRG]

Hi, @null54.  Any idea when you might be updating this plugin based on libjxl v0.7 which was released a couple of weeks ago?  Thank you for your work on this plugin.
 

[null54]

3 hours ago, 0.NRG said:

Any idea when you might be updating this plugin based on libjxl v0.7 which was released a couple of weeks ago? 

 

When the libjxl version in vcpkg is updated. I opened an issue requesting this, but the PR that fixes it has not been merged yet.

[null54]

Release version 1.0.2.

Changes:

• Updated to libjxl version 0.7.0.
• Added support for EXIF and XMP metadata
• Changed the encoder speed slider behavior to match cjxl
• Fixed a potential infinite loop when reading a truncated file

[VcSaJen]

On 8/29/2022 at 4:06 PM, null54 said:

I strongly recommend you save your work in another format before exporting to JXL using this plugin.

If libjxl encounters an unexpected error it may cause paint.net close without warning.

Are there any example *.jxl files that would cause crash?

[null54]

4 hours ago, VcSaJen said:

Are there any example *.jxl files that would cause crash?

 

I have not seen any files that cause a crash when opening or saving, but I have encountered a crash when changing the encoder parameters in a debug build of the plugin.

 

That warning is due to the fact that libjxl calls the C runtime abort() function as part of its error handling. Because of this libjxl could terminate the Paint.NET process if it encounters any unexpected error, e.g. out of memory or a corrupt file.

The libjxl repository has an open issue related to removing the abort code: https://github.com/libjxl/libjxl/issues/1450

[null54]

Release version 1.0.3.

This release is for Paint.NET 5.0+.

 

Changes:

 

Updated to libjxl version 0.8.0.

[null54]

Release version 1.0.4.

This release is for Paint.NET 5.0+.

 

Changes:

• Update libjxl to version 0.8.2.
• Added the plugin and libjxl versions to the save UI.
• Ignore corrupted EXIF data.

[null54]

Release version 1.0.5.

Changes:

• Convert XYB encoded images to sRGB when loading.
• Fixed saving images with embedded color profiles.

[VcSaJen]

0.10.x is pretty exciting, can't wait for an update!

P.S. Any chance for jpegli plugin? It's an alternative to mozjpeg.

Edited April 6 by VcSaJen

[null54]

6 hours ago, VcSaJen said:

1.10.x is pretty exciting, can't wait for an update!

 

I am waiting for version 1.0 to be released, that way I won't have to repeatedly update the plugin for the libjxl API changes.

 

6 hours ago, VcSaJen said:

P.S. Any chance for jpegli plugin? It's an alternative to mozjpeg.

 

I have no plans to make a jpegli plugin.

[VcSaJen]

Quote

I am waiting

Just FYI, there was a serious bug in the decoding part, so all old versions are non-compliant to the file format standard (all old versions fail to decode some jxl files).

[RasterizedMuffins]

According to the official JPEG working group's site, the JPEGXL format supports layers, but when I try to save using this plugin as that format it always prompts me to flatten the image.

 

Am I misunderstanding something?

[null54]

55 minutes ago, RasterizedMuffins said:

Am I misunderstanding something?

The JPEG XL format supports layers, but this plugin currently does not.

[RasterizedMuffins]

Ah.

 

Fair enough. Thanks for the quick response!

 

Do you have any plans to introduce said support, by chance?

[null54]

2 hours ago, RasterizedMuffins said:

Do you have any plans to introduce said support, by chance?

No. I am not ruling it out as a possibility, but it would be a long-term feature. There is also an issue requesting multi-layer support on GitHub.

[RasterizedMuffins]

Fair enough. Thanks for all your hard work regardless. I appreciate it.

[null54]

Release version 1.0.6, which updates libjxl to version 0.11.0.

[user.by]

43 minutes ago, null54 said:

Release version 1.0.6, which updates libjxl to version 0.11.0.

JpegXLFileType.pdb file is missing.

[null54]

7 minutes ago, user.by said:

JpegXLFileType.pdb file is missing.

I didn't include the PDB with this release.

[user.by]

10 minutes ago, null54 said:

I didn't include the PDB with this release.

we can remove before pdb file from filetype folder.

[null54]

29 minutes ago, user.by said:

we can remove before pdb file from filetype folder.

Yes.