How to improve image rendering?

[Joaquim Duran <joaquinduran adtelecom es>]

Dear all,

I'm developing an application for an embedded devices. This devices has
GUI screen but not GUI Acceleration.

I need to scroll some images in the window to simulate an animation. The
animation takes a lot of CPU resources (near to 100% of CPU) by placing
the Gtk::image widgets on the fixed container and redrawing.

Could you provide any suggestions to improve the rendering of images?
Gnomecanvas?

Also, Some of the images has transparent background. The calculation of
combined colors, are done using float numbers or integer ones?

Thanks and Best Regards,
Joaquim Duran