Interactive raster display system.

摘要

In a bit-mapped presentation display ssytem including an arbitrarily-shaped closed polygon filled with a first colour-coded pel pattern the boundary of the polygon is ascertained by identifying the first colour-coded pattern; determining all unique raster runs of the indentified first pattern, and creating a counterpart data representation thereof. The ascertained polygon is filled with a second colour-coded pel pattern by filling in at least a portion of the reaster colkour-coded domian with the second pattern according to the data representation.