GitLab

* src/font.c (font_filter_properties): New function, refactored from
  ftfont_filter_properties.
* src/font.h (font_filter_properties): Declare.
* src/ftfont.c (ftfont_filter_properties): Use font_filter_properties.
* src/w32font.c (w32font_booleans, w32font_non_booleans): New variables.
  (w32font_filter_properties): New function.
  (w32font_driver): Add w32font_filter_properties.