1. A method of generating a graphical display on a display device of a computing device, comprising: receiving control data to set a number of bits of a window ID for indexing into a window attribute table; reading a window ID from a window ID buffer; splitting the window ID into a first set of bits and a second set of bits according to the number of bits for indexing into the window attribute table set based on the control signal; and generating the graphical display using at least one entry obtained from at least one window attribute table, wherein the at least one entry is identified by at least one of the first set of bits and the second set of bits.