Can't seem to make that work either, so I am stopping this pursuit for the moment until I see if I can get some GNUplot gurus to give me some pointers; so far no luck with that either!
You've really gone above and beyond in trying to help and I'll come back when and IF I solve this!
With my thanks,
One last question:
Do those Moon Phase fonts support Unicode mapping?
From the GNUplot Font Help page:
"The fonts are retrieved from the usual fonts subsystems. Under Windows,
those fonts are to be found and configured in the entry "Fonts" of the
control panel. Under UNIX, they are handled by "fontconfig"."
"Pango, the library used to layout the text, is based on utf-8. Thus, the pdfcairo
terminal has to convert from your encoding to utf-8. The default input
encoding is based on your 'locale'. If you want to use another encoding,
make sure gnuplot knows which one you are using. See `encoding` for more
"Pango may give unexpected results with fonts that do not respect the unicode
mapping. With the Symbol font, for example, the pdfcairo terminal will use the map
provided by http://www.unicode.org/ to translate character codes to unicode.
Note that "the Symbol font" is to be understood as the Adobe
Symbol font, distributed with Acrobat Reader as "SY______.PFB".
Alternatively, the OpenSymbol font, distributed with OpenOffice.org as
"opens___.ttf", offers the same characters. Microsoft has distributed a
Symbol font ("symbol.ttf"), but it has a different character set with
several missing or moved mathematic characters. If you experience problems
with your default setup (if the demo enhancedtext.dem is not displayed
properly for example), you probably have to install one of the Adobe or
OpenOffice Symbol fonts, and remove the Microsoft one.
Other non-conform fonts, such as "wingdings" have been observed working."
With thanks again for all your effort on this.
Sorry to say, no joy, though there was the interesting result that when I loaded the unicode-mapped .otf PopChar asked for permission to access FB, which had not happened with the other versions.
Anyway, let's stop here. You've gone way beyond the necessary and I appreciate it very much.
I'm not sure how this discussion got marked "Solved my question" though.
With my thanks,
Many Many months later:
The problem finally got solved in a very roundabout manner: I found a font (in comp.fonts), Symbola, which includes glyphs for the new and full moons, and the first and last quarters, installed it, only to find that only the first/last quarters would display, and only when I set GNUplot to use UTF8.
Then it turns out that the glyphs for the New and Full Moon are recent additions to Unicode, but only Full would display on my desktop. So I had to use Large circle and Large Black Circle in their place. It finally now works in the PDF output generated by GNUplot. The different output "terminals" used by GNUplot tend to vary in how long it takes to catch up in such matters.
The place it finally all got solved was over in the comp.graphics.app.gnuplot, in this thread:
and in comp.fonts, in this thread:
I thought you might be interested to know the developments in this. I appreciated your help enormously at the time, even if we didn't solve it then!