Re: General punctuation spaces U+2000 to U+200B

At 01:09 AM 4/26/2003, William Overington wrote:

> So, how wide should I make U+2003 in font units please?

This should equal the UPM value of your font, since this is the scaling 
factor applied by the rasteriser. The actual height of the glyphs in your 
font is not equivalent to the *body* height which is determined by the UPM 
value. In TT fonts, the UPM value can be any value you like, e.g. you could 
change it to equal the actual height of your tallest characters, but is 
usuall a power of 2 (which gives a miniscule performance improvement) and 
is typically 2048. In the latter case, your em space, dash, etc. should be 
2048 units wide. This ensures that these glyphs are e.g. 12pts wide in 12pt 
text.

John Hudson



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