Now that DrawingContext makes it possible to draw on a ServerBitmap
without the need for a BView, we can replay pictures on app_server side,
avoiding the cost of creating a BBitmap, offscreen BWindow, and BView
from the application side.
The offscreen drawing context gets the same state as the view it's
rendering the picture for, so font size, drawing mode, etc are used.
The implementation is still the suboptimal one, converting the BBitmap
to a BRegion, and using that for clipping. Changing that comes next.
Adrien Destugues
e0d1cc186a