Re: [ft-devel] severe problems with subpixel hinting

[Infinality]

> > I'm trying to detect when functions match a certain criteria at FDEF
> > time, setting a variable in the execution context, and reading it
> > later during hinting, but it seems like it's not set to what I
> > expect it to be once the hinting process starts.
> What's the problem?

Well, I'm trying to set a variable inside the execution context during 
Ins_FDEF that will set compatibility mode to "on" for the rest of the 
execution of glyph hinting for that entire face.  I'm assuming that the 
FDEFs are only read once during the prep, and not every time a glyph is 
loaded.  But, it "seems" (yes, a vague word) like compatibility mode 
isn't always on during execution, even though I know that the function 
opcode patterns were triggered, and compatibility_mode was set to TRUE 
for that execution context.

So, that makes me wonder if my assumptions about the execution context 
are even correct.  Like, let's say that Times New Roman gets loaded, and 
Ins_FDEF detects that compatibility_mode should be set to TRUE.  I set 
it as such, and then, Oxygen gets loaded, which sets compatibility_mode 
to FALSE, because it's a modern font without the triggering opcode 
patterns.  Then, I load another glyph from Times New Roman.  Will the 
execution context for that glyph have compatibility_mode set to TRUE or 
FALSE?

Basically, I just need a spot to store this compatibility_mode 
information so that it is preserved without having to re-execute the 
prep / FDEF stuff.  Does that make sense?

Thanks,
Erik