PARALLEL ALGORITHMS FOR GENERATING THE RASTER REPRESENTATION OF STRAIGHT-LINES AND CIRCLES

This paper presents two parallel algorithms for generating graphics primitives on a raster scan display device. The first algorithm is for drawing straight lines and the second is for drawing circles. The line algorithm requires three integer multiplies and one or two integer divides in its setup and has the same loop as the sequential algorithm, but requires only about 1/P as many iterations of the loop, where P is the number of processors. Its setup is the equivalent of about seven loop iterations. The circle algorithm requires only four integer multiplies in its setup and approaches a speedup of 90% P. Its setup is the equivalent of about one loop iteration. © 1991.