Add embedded bitmap support to CFF driver.

* src/cff/cffobjs.h (CFF_SizeRec): New structure.

* src/cff/cffgload.c (cff_builder_init): Updated.
(cff_slot_load): Updated.
[TT_CONFIG_OPTION_EMBEDDED_BITMAPS]: Load sbit.

* src/cff/cffobjs.c (sbit_size_reset)
[TT_CONFIG_OPTION_EMBEDDED_BITMAPS]: New function.
(cff_size_get_globals_funcs, cff_size_done, cff_size_init): Updated.
(cff_size_reset): Updated.
[TT_CONFIG_OPTION_EMBEDDED_BITMAPS]: Call sbit_size_reset.

* src/cff/cffdrivr.c (Load_Glyph): Updated.
(cff_driver_class): Use CFF_SizeRec.

* docs/CHANGES: Updated.
8 files changed