Output from tiff66print can also be compared between the original file and the repacked version. The repacked version may be larger if more than one TIFF field points to the same data encoding will duplicate it. The sizes of the original and repacked files can also be compared. The output of tiff66print will show any unknown fields. Such fields need to be supported in the library explicitly if the data is to be retained when rewritten. For example, fields that are apparently integers can actually be pointers to arbitrary data. TIFF is a difficult file format, and there may be omissions in this library that prevent correct processing of all possible TIFF files. The Exif44 library extends this library with additional support for Exif fields, and has corresponding print and repack programs. The tiff66repack program decodes a TIFF file and encodes it into a new file. The tiff66print program prints the IFDs (image file directories) and fields of a TIFF file. The buffer could be modified in-place if only simple changes to field data are made. This saves copying and memory use, but modifying the data in one place will also modify it in the other. Reading and rewriting a file will require space for two byte slices.ĭata is unpacked into structures that contain pointers to the raw data in the original byte slices. This library is still under construction and may change at any moment without backwards compatibility.ĭata is encoded and decoded from Go byte slices, so is limited to files that can fit in available memory. It can be used to extract or add information to TIFF files, but doesn't include functionality for processing images.įor documentation, see. Tiff66 is a Golang library for encoding and decoding TIFF files.
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