[task #16096] Writing of TIFF files

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/task/?16096>

                 Summary: Writing of TIFF files
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Wed 15 Dec 2021 08:10:50 PM UTC
         Should Start On: Wed 15 Dec 2021 12:00:00 AM UTC
   Should be Finished on: Wed 15 Dec 2021 12:00:00 AM UTC
                Category: Libraries
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: Postponed
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

Currently Gnuastro's can only read from TIFF files, it can't write to them
(see the lib/tiff.c
<https://git.savannah.gnu.org/cgit/gnuastro.git/tree/lib/tiff.c> file in
Gnuastro's source)!

The main reason behind this was time: unlike JPEG (which is only one image per
file), TIFF allows multiple images per file (like FITS extensions), so the
libtiff library's writing functions are a little more complicated than those
functions for reading.

As a result, I only implemented reading of TIFF files (which I needed at that
moment), not writing of TIFF files!

If anyone is interested in doing this, please make a post here, its a good
chance to learn professional APIs of important libraries!

I'd be happy to help. There are other examples of reading or writing to
different file formats, like lib/eps.c
<https://git.savannah.gnu.org/cgit/gnuastro.git/tree/lib/eps.c> (for writing
EPS files), lib/jpeg.c
<https://git.savannah.gnu.org/cgit/gnuastro.git/tree/lib/jpeg.c> (for
reading/writing JPEG files), lib/pdf.c
<https://git.savannah.gnu.org/cgit/gnuastro.git/tree/lib/pdf.c> (for writing
PDF files, which actually writes EPS, then compiles them to PDF), and of
course, lib/tiff.c
<https://git.savannah.gnu.org/cgit/gnuastro.git/tree/lib/tiff.c> (that
currently on reads from TIFF files).




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