I've got draw_image() displaying an image for cairo and gtkcairo
backends and have a few questions.
- Why does draw_image() not have a gc argument like the other
- What is the Image class image format or formats(s) ? Is it an array of
float32 and RGBA32?
- image_demo.py, image_demo2.py are working but colors are not same as
gtkagg, Cairo supports A1, A8, RGB24 and ARGB32