The host facing GEGL API is getting closer to a stage where it should be scrutinized before an initial tarball release. The API that is getting stable is the host facing API, which is the portions of the GEGL library exposed in gegl.h[1]. Usage of this API is illustrated in the hello world example[2] in the documentation. 1: http://cvs.gnome.org/viewcvs/gegl/gegl/gegl.h?view=markup 2: http://cvs.gnome.org/viewcvs/gegl/docs/hello-world.c?view=markup Comments and requests for renaming/clarification of this API would be most welcome, the API to write plug-ins as well as the XML serialization format are still not ready to be stabilized. But the public API should be possible to keep largely unchanged whilst adding optimizations internally in the GEGL engine. Right now I think there is two issues that needs resolving, the most important one is probably exposing introspection of meta data/properties for operations. The current function GSList * gegl_operation_list_operations (void); which returns a static list of operation names is not good enough. To discover the parameters a temporary GeglNode needs to be instantiated and it's list of properties must be examined. I want to avoid exposing the GObject internals of GEGL in the public API. The other issue is hit detection, this is a more minor issue, and I think introducing API to do this can be postponed until later, but most probably adding a function similar to the following would work: GeglNode *gegl_node_hit_test (GeglNode *node, gint x, gint y, gdouble alpha_threshold); As part of exercising the API some additional GUI integration code has also been written, most importantly GeglProjection a cache/queue for rendered output from a node (which probably will be reused internally in GEGL for caching) and GeglView a GtkWidget for viewing/requesting renderings from a projection. GeglView together with some other convenience code for using GEGL from GTK+ will probably be wrapped up in a helper GUI library. /Øyvind K. -- «The future is already here. It's just not very evenly distributed» -- William Gibson http://pippin.gimp.org/ http://ffii.org/ _______________________________________________ Gegl-developer mailing list Gegl-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gegl-developer
