SDL_haa (libsdl-haa1.2-dev) is my own work and currently only in use by DrNokSnes, but it is a plain SDL wrapper around the Hildon Animation Actor atoms, and animation actors are documented: http://maemo.org/api_refs/5.0/5.0-fi...tionActor.html

If you're going the SGX route, then I suggest using actors to scale (since they will still work as fast when the compositor is enabled, for example in windowed mode). But for simpler scalings, software _is_ the better choice for now.