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

[Infinality]

> > I've verified with debug messages that for TNR Regular, subpixel
> > hinting and ignore_x_mode are successfully being set TRUE in
> > tt_loader_init().  However, the execution context in ttinterp.c has
> > them set to FALSE at the beginning of TT_RunIns().  I'm wondering if
> > in some cases the execution context is being *reused* in Firefox
> > without calling tt_loader_init().  That could also explain the weird
> > graphic glitches that only happen in TNR Regular.  Does that sound
> > plausible?  Guess I'll have to dig into Firefox code.
> I'm clueless, sorry.  You might contact Jonathan Kew
> <address@hidden> for help; AFAIK, he is one of the guys
> responsible for the font engine of Firefox.
>
>
>      Werner

I think I've figured out the issue here, and (huge surprise) it's not 
firefox.  I was making the detection of opcode patterns dependent on 
ignore_x_mode being set, however this doesn't get set until glyphs are 
loaded.  I'm just going to allow opcodes to be detected simply if 
TT_CONFIG_OPTION_SUBPIXEL_HINTING has been defined.  Then, 
compatibility_mode will get enabled during runtime whenever the 
rendering mode isn't mono.

Thanks,
Erik