[ft] Unable to add glyph to unassigned unicode value

[Ferdinand Ramirez]

I have problems displaying a glyph that I added to an existing font. Here are  
the steps I followed.

- I downloaded a font and used gtk markup language in my source code to load 
the font and display the value for 'J' on a gtk label and it worked fine.

- To make sure that I made no errors, I loaded this font in fontforge, double 
clicked on the glyph image for 'J' to open the glyph in edit mode, did a Select 
All and copied the glyph. I then edited the glyph for U+E3C6 and pasted the 
glyph and saved it.

- I then ran my program and did an sprintf of "\uE3C6" into a buffer and tried 
to display this buffer on the gtk label using the gtk markup language (this is 
how I displayed for 'J' as well). This time, instead of displaying the glyph, 
it just displayed the letters E3 on the top row and the letters C6 on the 
bottom row with a small square border around the letters.

What steps am I missing? I am new to fontforge and any help will be 
appreciated. My aim should be pretty simple for people here - I want to use an 
unused unicode value and display my glyph from my program. Ideally, I will want 
to display it on gtk widgets using gtk markup language after loading the font 
at runtime, but if you have answers for other means of displaying such glyphs, 
I am eager to know those as well.

I should add that I did get an error when I did a generate font which said that 
I'm saving the font in a 1-byte encoding format and will not be able to see 
more than 256 values. I am not sure how to overcome this error in case this was 
the reason for my inability to display my font.

Thanks,
-Ferdinand