Shapes or line based filling

[Trilarion]

Currently the app has png compressed black and white images of continuous lines and then using a custom fill algorithm for the coloring. It's not too difficult and works well except for very large images and complicated shapes where filling can take a bit longer.

Instead if could convert the white areas in the images to shapes and then use underlying filling capabilities of the OS. This may not be faster actually, but probably would use less memory and less code and might potentially scale better on a high resolution screen. It would also mean that the images must be stored differently (as collection of shapes instead).

It's a bit like rasterized images versus vector graphics.