iohann.s.titov@gmail.com Ivan S. Titov Gwyddion is a modular program for SPM data analysis. The 3.x series is an upstream rewrite targeting GTK+ 3, still marked unstable by upstream. It co-installs with the 2.x series (sci-visualization/gwyddion) since the binary is renamed to gwyddion3 and all libraries have a 3 suffix. The -r1 revision enables Python 3 scripting (pygwy) via GObject Introspection and PyGObject 3; scripts use the namespaced Gwyddion/GwyApp/GwyUI imports, not the 2.x 'import gwy' interface. Enable FITS image import via sci-libs/cfitsio Enable hdf5 support Generate GObject Introspection .gir/.typelib files so Gwyddion's libraries can be consumed from bindings (Python, JavaScript, Vala). Required for USE=python. Enable dev-libs/json-glib-based JSON import/export Build pygwy, the Python 3 scripting bridge. Implies USE=introspection and pulls in dev-python/pygobject. Provides a plug-in discovery path and an in-process console registered as /Python Console. Use x11-libs/gtksourceview:4 for Python syntax highlighting in the pygwy console. Implies USE=python. Enable WebP image export via media-libs/libwebp