[bug #61967] DS9 polygon region files not read when width and color are set

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?61967>

                 Summary: DS9 polygon region files not read when width and
color are set
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Tue 01 Feb 2022 12:32:01 AM UTC
                Category: Libraries
                Severity: 3 - Normal
              Item Group: Crash
                  Status: Postponed
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

When a region file is visually made with DS9 and the user gives it a
non-standard width or color, the region file can't be read by Gnuastro, with
an error like this:


$ astcrop image.fits --polygon=ds9.reg
astcrop:ds9.reg:4: line with polygon vertices doesn't end with ')'. It is
expected for the line to have this format: 'polygon(AAA,BBB,...)'. Where 'AAA'
and 'BBB' are numbers and '...' signifies that any number of points are
possible


This happens because in such cases, DS9 appends the line with the
'polygon(...)' definition with '# color=CCCCC width=XXXX'. For example, here
is the basic region file that caused the error above (after changing the width
and color of the region):


$ cat ds9.reg 
# Region file format: DS9 version 4.1
global color=green dashlist=8 3 width=1 font="helvetica 10 normal roman"
select=1 highlite=1 dash=0 fixed=0 edit=1 move=1 delete=1 include=1 source=1
image
polygon(505.48874,678.30722,595.26462,678.30722,595.26462,588.53135,505.48874,588.53135)
# color=black width=4


We should allow the code that reads the region file to allow anything after
the closing parenthesis of 'polygon(...)'.




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