1. A method for allocating a workload in a pixel sequential rendering system comprising a plurality of processors, said workload comprising a raster pixel image comprising a plurality of graphical objects, said method comprising, for each scan line of said raster pixel image, the steps of: identifying, in a predetermined order, edges of said plurality of graphical objects that intersect with a current scan line of said raster pixel image; dividing a span of pixel locations on the current scan line defined by an adjacent pair of edges of the identified edges into a plurality of segments, one of the plurality of segments comprising varying pixel values; and allocating, independently of existing workloads of said plurality of processors, said plurality of segments to respective ones of said plurality of processors for rendering.