Are these implemented? I have tried to find the callback signature in my delegate but it seems they don’t affect anything. I wish to know exactly when a filter, its name and params, and on which layer it is run.
Are you trying this in python or ObjectiveC?
Objective-C with GSCallbackHandler…
[GSCallbackHandler addCallback:self forOperation:GSPreFilterCallbackName]; [GSCallbackHandler addCallback:self forOperation:GSFilterCallbackName];