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EXIF improvements and bugfixes

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- Fixes a writing issue for float values ​​less than 1
- Fixes a missing definition of `EXIF_DATETIMEDIGITIZED` tag
- Adds support for some common camera shot metadata
- Adds missing metadata to writing tests

The following plugins automatically gain support for the new metadata: AVIF, IFF, HEIF, JXL, JXR, PSD and TGA (V2E).

The new metadata added with this patch is usually saved by smartphones (e.g. iPhone or Google Pixel).
This commit is contained in:
Mirco Miranda
2026-04-26 06:08:25 +02:00
parent 51db11eefc
commit 191e5e6a69
7 changed files with 559 additions and 13 deletions
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12
src/imageformats/util_p.h
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@@ -34,10 +34,22 @@
#define META_KEY_MODIFICATIONDATE "ModificationDate"
#define META_KEY_OWNER "Owner"
#define META_KEY_SOFTWARE "Software"
#define META_KEY_SPEED "Speed"
#define META_KEY_TITLE "Title"
#define META_KEY_XML_GIMP "XML:org.gimp.xml"
#define META_KEY_XMP_ADOBE "XML:com.adobe.xmp"
// Shot info metadata keys
#define META_KEY_DIGITALZOOMRATIO "DigitalZoomRatio"
#define META_KEY_EXPOSUREMODE "ExposureMode"
#define META_KEY_EXPOSUREPROGRAM "ExposureProgram"
#define META_KEY_EXPOSURETIME "ExposureTime"
#define META_KEY_FLASH "Flash"
#define META_KEY_FNUMBER "FNumber"
#define META_KEY_FOCALLENGTH "FocalLength"
#define META_KEY_ISOSPEEDRATINGS "ISOSpeedRatings"
#define META_KEY_WHITEBALANCE "WhiteBalance"
// Camera info metadata keys
#define META_KEY_MANUFACTURER "Manufacturer"
#define META_KEY_MODEL "Model"