Forces a change in the context, which will cause any pango.context.Context
using this fontmap to change.
This function is only useful when implementing a new backend
for Pango, something applications won't do. Backends should
call this function if they have attached extra data to the
context and such data is changed.
Forces a change in the context, which will cause any pango.context.Context using this fontmap to change.
This function is only useful when implementing a new backend for Pango, something applications won't do. Backends should call this function if they have attached extra data to the context and such data is changed.