Locate a #PangoMap for a particular engine type and render type. The resulting map can be used to determine the engine for each character.
the language tag for which to find the map
the engine type for the map to find
the render type for the map to find
Return: the suitable #PangoMap.
See Implementation
Locate a #PangoMap for a particular engine type and render type. The resulting map can be used to determine the engine for each character.