GIMP 2.10.22 is a bug fix release, which for once contains mostly maintenance changes in core code.
Improved HEIC and newly added AVIF support Numerous improvements in the PSP file format support Improved multi-layer TIFF exporting Better handling of the Exif “Orientation” metadata New “Sample merged” option in the GEGL operation tool
On official plug-in side though, there are quite a few improvements, in particular, better support of image formats, as well as support for one new format, AVIF.
The highlight of this release is clearly the contributions on file format plug-ins.
HEIF: improved HEIC and newly added AVIF support¶
AVIF is the HEIF variant using AV1 compression (instead of HEVC in the same HEIF container format, which is the default and also called HEIC). This format was highly awaited as being an open, royalty-free, video coding format developed by the Alliance for Open Media.
AVIF is already supported on the web in Firefox (experimentally, you must enable image.avif.enabled in about:config), Chrome and Opera, which makes it a serious contender as a web image format.
It is now supported by GIMP, both for import and export.
Not only this, but HEIF files (both AVIF and HEIC) can now be imported and exported in high bit depth (10- and 12-bit per channel).
GIMP 2.10.20 brings AVIF support, as well high-bit depth support. It will also import NCLX profiles and metadata.
And finally, NCLX color profiles and metadata will now be properly imported.
These changes all happened thanks to the awesome contributions of Daniel Novomesky.
The plug-in for reading PSP (Paint Shop Pro) files has received numerous bug fixes and improvements. Raster layers from PSP images over version 6 are now supported, as well as 16-bit integer, grayscale, and indexed images.
Furthermore, PSP blend modes are now better converted to GIMP layer modes for correct rendering.
The importer is also much more robust and is even able to fix errors of some files which may have been wrongly exported by third party software. It also handles some edge cases like zero-length layer names better.
All these improvements were made by Jacob Boerema, one of GIMP newest core contributors.
Multi-layer TIFF export got improved by allowing to crop layers to image bounds in the exported image. Indeed, TIFF has no concept of global image bounds, only layer bounds. Hence cropping the layers is the only way to enforce the image bounds.
Obviously, this cropping may or may not be what you wanted and perhaps you were expecting layers of various sizes. This is why the feature is available as a new optional Crop layers to image bounds checkbox in the export dialog.
There have been other bug fixes and improvements in the TIFF plug-in as well.
BMP, DDS, JPEG, WebP, XPM…¶
Other file format supports were improved. In particular:
BMP always include color masks when exporting BMP with color space info, as mandated by BITMAPV5HEADER specification. DDS import is now a bit more permissive, allowing to load some files with invalid header flags regarding compression, while we are able to know the right compression from other flags. This allows to recover invalid DDS files exported by other software. JPEG and WebP detection improved. XPM does not export a “None” (transparent) color when unused. Exporting an unused color was notContinue reading