Puts back the registered hatch patterns the map no longer holds.
Meant for the moment a style has just been replaced. After a rebuild from scratch the image
store is empty, and every pattern registered through registerHatchPattern is drawn
again; after a diff the patterns are still there, and this does nothing.
Puts back the registered hatch patterns the map no longer holds.
Meant for the moment a style has just been replaced. After a rebuild from scratch the image store is empty, and every pattern registered through registerHatchPattern is drawn again; after a diff the patterns are still there, and this does nothing.