Re: [Silgraphite-fonts] Problems with attaching a reordered vowel sign to its base

[Sharon C. <sha...@si...>]

On 7/28/2012 12:08 PM, Shriramana Sharma wrote:
> BTW do I correctly understand that if a (diacritic) glyph is attached
> to another using attach.at and .with, and the advancewidth of the
> attached (diacritic) glyph is in fact non-zero in the font, then after
> attachment such advancewidth is ignored?

No. For Graphite1, if the advance-width is non-zero, it will affect 
the advance of the base character. If the advance width is zero, the 
metrics of the diacritic will be ignored as far as positioning the 
base. (It should be possible to set the advanced width to zero using 
GDL, even if the font uses something different.)

But there is some difference between Graphite1 and Graphite2. 
Graphite2 automatically adds some guard space for the diacritic, even 
when the advance-width is zero. Martin and I have just been discussing 
this difference recently.