Add "gboolean use_cache" to gimp_applicator_new(). Don't use a cache
anywhere but in GimpImageMap because it incrementally fills that cache
via the projection update. In gimp_drawable_merge_filter(), get that
cache and pass it to gimp_gegl_apply_cached_operation() which then
avoids doing the work twice for the already cached results. Win!
Add "linear" parameter to GimpApplicator. Pass the drawable's "linear"
to the applicator, and to all calls to gimp_gegl_mode_node_set_mode(),
instead of hardcoding FALSE everywhere.
which means adding a lot of proper API. Input, output and aux can be
pads or buffers. Make sure it uses the minimum possible graph in all
cases and doesn't reconfigure nodes unless needed. Port GimpPaintCore
to the new API.
and use it in GimpPaintCore, instead of calling
gimp_drawable_apply_buffer() which sets up a new graph for each
call. Makes painting speed bearable again.
Michael Natterer