[Plplot-devel] Important change to unicode text handling in core

[Thomas J. D. <to...@fi...>]

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Hi,

     Hazen: You will need to be aware of this.

     I have made a change to plP_text in the core with regards to how it
handles unicode text.  This was necessary to get the plot buffering
working correctly.

     Previously, the coordinates of the unicode text were not being
put through the driver interface filter.  Because of this, some drivers
compensated by applying the driver interface filter themselves.  For the
plot buffer to work correctly for all output devices, the driver interface
filter must be applied consistently, and so I have added the appropriate
code to plP_text.

     There are consequences for a few of the drivers.  In ps.c, I removed
the lines

  /* Apply plplot difilt transformations */
  difilt(&args->x, &args->y, 1, &clxmin, &clxmax, &clymin, &clymax);

which are no longer needed.  Note that the difilt operation for the
clipping is still used.

     The only other driver that I see that has similar lines is the
AQUATERM driver.  I leave it to Hazen to remove the offending lines,
because I cannot test the results.  Should any problem arise, please let
me know.

     I have tested both the ps and gd drivers, and both appear to be
working correctly.  Note that the change can only affect unicode-enabled
drivers.

     From the GCW driver, the plot-buffer saved result now matches that
from the raw psc device.  Excellent!

Cheers,
Tom

- --
Thomas J. Duck <to...@fi...>

  Department of Physics and Atmospheric Science, Dalhousie University,
    Halifax, Nova Scotia, Canada, B3H 3J5.
  Tel: (902)494-1456 | Fax: (902)494-5191 | Lab: (902)494-3813
  Web: http://aolab.phys.dal.ca/~tomduck/
  Public key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x17D965DB
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