initialize in constructor
clear usage flags for all entries
removes entries not used after last call of checkpoint() or cleanup()
find font face definition by family only (try to get one of defaults for family if possible)
find font face definition by face only
find font face definition by family and face
get font by properties
initialize font manager by enumerating of system fonts
register enumerated font
for returning of not found font
sets new font manager singleton instance
returns font manager singleton instance
get font instance best matched specified parameters
clear usage flags for all entries -- for cleanup of unused fonts
removes entries not used after last call of checkpoint() or cleanup()
Font manager implementation based on Win32 API system fonts.