I've run into some CFF fonts that use the divide operator, which is
unimplemented in the new CFF interpreter.
Here's a patch that fixes it -- at least for the fonts I'm looking at.
I'm doing a floating point divide and then converting to fixed point.
There may be a better way to handle it. Maybe someone more familiar
with the cf2 internals could comment?
I was going to include a sample font, but I can't get ftview to load CFF
fonts (and I need it to figure out exactly which font(s) are the problem
cases). Is there some trick to making ftview work with CFF fonts?
- Derek
*** freetype-2.6.2/src/cff/cf2intrp.c 2016-02-04 18:55:23.328184725 -0800
--- freetype-2.6.2b/src/cff/cf2intrp.c 2016-02-04 19:01:36.821256136 -0800
***************
*** 871,880 ****
break;
case cf2_escDIV: /* in spec */
! FT_TRACE4(( " div\n" ));
! CF2_FIXME;
! break;
case cf2_escNEG: /* in spec */
FT_TRACE4(( " neg\n" ));
--- 871,888 ----
break;
case cf2_escDIV: /* in spec */
! {
! CF2_Int num;
! CF2_Int den;
! FT_TRACE4(( " div\n" ));
!
! den = cf2_stack_popInt( opStack );
! num = cf2_stack_popInt( opStack );
! cf2_stack_pushFixed( opStack,
! cf2_floatToFixed((float)num / (float)den)
);
! }
! continue;
case cf2_escNEG: /* in spec */
FT_TRACE4(( " neg\n" ));
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