Add FT_Get_PS_Font_Value() API.

This allows a Type 1 font face to be interrogated to retrieve most
of the dictionary keys (keys not relevant to FreeType's Type 1
interpreter are not available).

* include/freetype/internal/services/svpsinfo.h
(PS_GetFontValueFunc): New typedef.
(PSInfo): Add `ps_get_font_value'.
(FT_DEFINE_SERVICE_PSINFOREC): Updated.

* include/freetype/internal/t1types.h (T1_EncodingType): Moved to...
* include/freetype/t1tables.h: Here.
(PS_Dict_Keys): New enumeration.
(FT_Get_PS_Font_Value): New declaration.

* src/base/fttype1.c (FT_Get_PS_Font_Value): New function.

* src/type1/t1driver.c (t1_ps_get_font_value): This new function
does the real job.
(t1_service_ps_info): Add it.

* src/cff/cffdrivr.c (cff_service_ps_info), src/cid/cidriver.c
(cid_service_ps_info), src/type42/t42drivr.c (t42_service_ps_info):
Updated.
9 files changed