Gert Pellin - GPE 5064d80b1e TIFF: write and read EXIF as the file's own Exif and GPS directories (#4876) ...

A flat TIFF dropped EXIF on export ("EXIF not supported") and ignored it
on import. TIFF is EXIF's own container: IFD0 points to the Exif (34665)
and GPS (34853) directories and holds the descriptive tags.

- Export: the EXIF block's Exif and GPS directories are written as
  directories outside the page chain, IFD0 points to them, and IFD0's
  descriptive tags (ImageDescription, Make, Model, Software, DateTime,
  Artist, Copyright) are added unless the text metadata already wrote
  them. Values are copied as bytes, reordered to the file's byte order,
  so unknown tags survive.
- Import: a classic TIFF with an Exif or GPS directory gets an EXIF
  block built from them and IFD0's descriptive tags.
- TIFF's format caps now include EXIF. Layered TIFFs keep EXIF as
  resource 1058 as before (read back unchanged); the layered importer
  already preferred the TIFF's own EXIF when there is one.

exiftool and Photoshop 2025 read the Exif and GPS tags of such a TIFF.

Fixes #4875

2026-10-13 13:24:27 -04:00

..

examples

raw: fit non-DNG colour to the camera's embedded JPEG (#2135)

2026-10-11 05:45:46 -04:00

src

TIFF: write and read EXIF as the file's own Exif and GPS directories (#4876)

2026-10-13 13:24:27 -04:00

tests

TIFF: write and read EXIF as the file's own Exif and GPS directories (#4876)

2026-10-13 13:24:27 -04:00

Cargo.toml

Add OpenRaster (.ora) import and export (#2257)

2026-10-10 08:40:35 -04:00