1. An apparatus comprising: a plurality of vertex buffers to store vertex data; and a plurality of bin buffers, each associated with a different zone on a display device and to store a combination of a plurality of contiguous primitives as a single primitive, the single primitive including a command header and a plurality of vertex indices, wherein the plurality of vertex indices are of a variable number based on a code in the command header to indicate a variable number of subsequent vertex indices for storage in each bin buffer.