Generic filters are a catch-all for filters which can't be placed elsewhere.
This category describes the following filters:
Odjeljak 9.2, “Convolution Matrix”
Odjeljak 9.3, “Distance Map”
Odjeljak 9.4, “Normal Map”
Odjeljak 9.5, “Dilate”
Odjeljak 9.6, “Erode”
Odjeljak 9.7, “GEGL Graph”
