kdu_region_compositor::refresh

Call this function to force the buffer surfaces to be rendered and composited again, from the raw codestream data. This is particularly useful when operating with a data source which is fed by a dynamic cache whose contents might have expanded since the buffer surface was last rendered and composited.

No processing actually takes place within this function; it simply schedules the processing to take place in subsequent calls to the process function.

The call is ignored if the object was constructed with a false persistent_codestreams argument, since non-persistent code-streams do not allow any image regions to be decompressed over again.