GIMP

What's new in this version:

Core:
- Ignore Pentax and PentaxDng metadata at export because they are unsupported
- DBus calls (remote file open, typically with double click on file browser; and remote command run) are now processed after all command line files (in case of calls during startup) and in the call order (FIFO) for consistency. Some timeout has also been added to not spam the core process with non-processable DBus calls during startup.
- Display profile name in "Color space" field of Image Properties and improve ellipsis & wrap on dialog fields whose contents' size is not controllable together with better dialog size management.
- Fix stack overflow when loading very large XCF files on Windows
- Point snapping now works outside the canvas. This is used for snap to guides, grid and vectors. Snap to grid only works off-canvas when "Show All" is enabled because off-canvas grid is not visible otherwise, though snap to guide and vectors will always work off-canvas.

Libgimp:
Various metadata improvements:
- Improve reading of iptc tags that appear more than once

Plug-ins:
- JPEG export will better advertize when metadata export fails, possibly with relevant error message. Image export would not fail, but at least we make the person aware metadata is not properly exported.

More robust TIFF import and export:
- Better handling of Exif.Thumbnail.* tags on export
- Import now ignores TIFF pages with invalid directory (rather than freezing and output an error to warn of possible data loss)
- Import attempts to count the directories by reading them when the headers does not announce any directory, which allows to salvage images with improper header. Also if reading of a directory fail, we now output a message to warn of possible data loss.
- Fixed loading 2 and 4-bit TIFF images in grayscale and indexed
- Improve support of ExtraSamples fields with non-conformant TIFF files
- Improve loading of multi page tiffs with linear TRC
- More safety checks as a result of fuzz-testing
- Improve loading of MinIsWhite and MinIsBlack images
- GeoTIFF tag support added (recognized and stored into image parasites at import, then exported back when TIFF format is used) with appropriate "Save GeoTIFF data" checkbox (checked by default) to disable GeoTIFF metadata export when not desired.
- The metadata viewer and editor got a big cleaning and refactoring

Pass, as well as various fixes and several improvements:
- Fix handling of IPTC tags which can appear more than once (such as "Keywords") in both the viewer and editor
- Always read both the IPTC and XMP equivalent tags in the editor, instead of assuming they are necessarily the same.
- More IPTC equivalents of XMP tags added:
- Iptc.Application2.LocationName <=> Xmp.iptc.Location
- Iptc.Application2.BylineTitle <=> Xmp.photoshop.AuthorsPosition
- Iptc.Application2.CountryCode <=> Xmp.iptc.CountryCode
- Iptc.Application2.Writer <=> Xmp.photoshop.CaptionWriter
- The editor now properly saves IPTC tags.
- Improve UTF-8 conversion to avoid double string conversion (hence actually breaking encoding)
- Use proper unit abbreviations and proper label casing
- GPS data is now properly formatted with better precision and with
- Translatable string parts and tooltips are added to explain how to
- Correctly edit GPS data (latitude, longitude, altitude)
- Also seconds part of latitude/longitude is now saved with more
- Precision and altitude details now switch from .1m to .10m
- Better error reporting when the editor fails to write a tag, with proper GUI error, so that such error do not go unseen
- Better error handling when closing the editor or viewer too, and improve error handling when the calendar dialog fails
- Use a logging domain for debugging-only messages which pollutes the output.
- Xmp.iptc.CreatorContactInfo/Iptc4xmpCore:* override the shorter forms Xmp.iptc.Ci* if both are present, since the longer form is more common.
- Improve saving of XMP metadata
- And more bug fixes and refactoring steps to get rid of duplicate code.
- PNG will now prompt only for layer offset different from zero. Some software were always setting an offset of 0 (e.g.: POV-Ray v3.7) so GIMP would unecessarily prompt the user until now for PNG created by such software.

BMP:
- Allow loading of BMP images with incorrect BI_BITFIELDS compression
- Support loading more bit depth such as 24bpp images

File-darktable:
- Support updated Lua API of darktable 3.6 and beyond
- Adding environment contents to debugging output when
- DARKTABLE_DEBUG env variable is set

PDF import:
- New option to reverse order of layer
- Support fractional DPI (allowing accurate page dimensions)

DDS:
- Set blue channel of BC5 dds images to 0 instead of 255
- Fix DDS BC5 compression/decompression with Red and Blue swapped
- We detect images created by an older GIMP on loading and swap the channels back

HEIF:
- Removes the "HDR" mention on HEIF 10/12-bit export because high bit depth does not necessarily means HDR
- Runtime detection of HEIC and AVIF file formats (depending on available encoders and decoders), which allows afterwards update of the dependency, but also allows usage for a single format (e.g. for distributions which want to support only AVIF).
- With libheif 1.10, visually lossless export is possible for 10/12 bit depths too

PSD:
- More flexible reading of layer mask record size, skipping invalid or unsupported mask info size, hence allowing us to load more PSD files (at least the part of a PSD we support instead of failing the whole import altogether).

G3 fax images:
- Improve error handling when loading
- Be more forgiving on bad lines which were quite frequent on older fax images, allowing to salvage some old images

Build:
- Some configure fixes for autoconf-2.70 support
- Adwaita's legacy "software-update-available" icon is now bundled with GIMP to handle the possibility of them being absent from your system theme (typically it was missing on our Windows build).

Installer:
- New Slovak translation

Translations:
- Kabyle translation added

Build:
- Bumping minimum GEGL to version 0.4.30