Using the image cache.

Hi,


I'm using FreeType for an engine that renders text on demand.  To make 
this as efficient as possible I'm using the cache API for all my 
rendering.  I'm calling FTC_ImageCache_LookupScaler to get my FT_Glyph, 
and using FT_Glyph.advance.x to move the cursor to the next start.


I'm having a problem, however, rendering certain text for SOME fonts.  
For instance, Anonymous Pro 
(https://fonts.google.com/specimen/Anonymous+Pro?query=Anonymous). The 
issue can be seen when rendering text like "MAIL."  I get a big gap 
between the M and the A.

Investigating this with FontForge, the issue appears to be that the A 
has a negative left-side bearing.  If I adjust the cursor position by 
this amount before I render the A, everything looks perfect.


My issue, however, is that the left side bearing isn't available in an 
FT_Glyph.  It's only available, it seems (as horiBearingX) in the 
FT_Face.glyph.metrics (FT_Glyph_Metrics) structure.  And that's not 
getting updated when I'm loading a glyph from the cache.


What's the best way to deal with this issue?


Thanks,


Brian