NGRegion does the majority of drawing for a controls based application but is only a simple implementation for now. For example it does a large paint image loop to tile images in many cases. Also it is not written to avoid garbage creation during paint etc. We have added one fast path using ImagePattern in RT-10497 with work on ImagePattern it could be extended to cover the other repeat styles.

Hopefully much of Region could be painted by one or more shaders and be crazy fast.