A method is provided for managing windows in a raster display. The method includes generating a first display map defining sequential picture element runs, each run having a common set of windows containing the picture elements of the run. The windows are arranged in a stacking order and include a topmost...http://www.google.de/patents/US5596345?utm_source=gb-gplus-sharePatent US5596345 - Method for managing non-rectangular windows in a raster display
