wxt terminal - questions

[Ethan A M. <merritt@u.washington.edu>]

Two questions

(1) 
I've been poking about in the code, and so far as I can
see the code assumes that character strings passed to Pango
will be interpreted as UTF-8.  E.g. the following comment:

  /* pango needs a string encoded in utf-8. We use g_convert from glib.
   * gp_cairo_get_encoding() gives the encoding set via 'set enconding'
   * memory allocated for enhanced_text_utf8 is freed at the end of 
   * gp_cairo_enhanced_flush */
  string_utf8 = g_convert(string, -1, "UTF-8", gp_cairo_get_encoding(plot), NULL, NULL, NULL);

But this doesn't happen. My machines are normally set to a UTF-8 locale,
and all characters I type into gnuplot are UTF-8 encoded.  
But the multibyte characters are mangled when displayed in the wxt plot window.
The same strings are properly displayed in x11 (when set to multibyte mode)
and in gd (which by default uses UTF-8).  So I know they are correctly
stored inside gnuplot. What's going wrong in wxt?

(2)
I happened across a page of sample plots from another plotting program,
and was struck by how useful transparency can be in some cases.
In particular in the case of overlapping histograms
   http://sourceforge.net/project/screenshots.php?group_id=15494
I think it would be possible to support this in gd.trm and svg.trm,
but I'm not sure about any other terminals.   Do the Cairo graphics
primitives support an alpha channel, so that wxt.trm could use this also?


-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742