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Exif support #221
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Exif support #221
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Thanks for sharing this! I've been wanting to add better EXIF handling to image-rs and being able to convert the EXIF data in a TIFF file into the same form as the EXIF chunks in PNG or JPEG would certainly help with that. It'll probably be a little while before I have a chance to work on implementing that, so I'll leave this open for now |
Where is this at ? I am interested in writing Exif as well and would love to help. |
IFD data structures are defined twice. In Line 161 in 6dc7a26
Lines 565 to 569 in 6dc7a26
And Line 699 in 6dc7a26
Lines 334 to 338 in 6dc7a26
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Does this require an |
Curious whether this is (or can be turned into) something usable for more than just me.
I've added a way to access embedded Exif tags in a sort-of-standardized way. The basic idea is that allows access when decoding images for other parsing libraries and for recoding images with the Exif tag intact. Since Exif is essentially TIFF-formatted, all the basic tools were more or less in place and I just had to tweak them a bit. The things that were really missing was support for IFD sub-directories and encoding values with a dynamically derived type.
Decoder -> has a method to gather the Exif information, store the entries and feed them into an encoder for a TIFF-file without pixel data.
Encoder -> has a similar method to decode TIFF-file with-or-without pixel data and feed the Exif entries into the encoder itself.