A graphics system and method are disclosed that may optimize the rate of pixel
generation to match the rate at which a memory may be designed to receive pixel
data. If a memory is configured to store multiple pixels substantially simultaneously,
it may be advantageous to render an equivalent number of pixels substantially simultaneously
and at the same rate. An edge walker that utilizes multiple sets of accumulators
to generate multiple scan lines substantially simultaneously and a span walker
that utilizes multiple sets of accumulators to render multiple pixel values substantially
simultaneously is described.