Patent ID: 7432941

Claim:
A computer system for determining if a target display subsystem is compliant with a reference subsystem, comprising: (a) a reference display subsystem operative within the computer system for receiving drawing instructions and generating image data suitable for display on a display device; (b) a target display subsystem operative within the computer system for receiving drawings instructions and generating image data suitable for display on an output device; and (c) a compliance test subsystem, wherein the compliance test subsystem: (i) generates drawing instructions; (ii) applies said drawing instructions to either of said reference display subsystem or said target display subsystem; (iii) stores image data generated by said either of said reference display subsystem or said target display subsystem resulting from the application of said drawing instructions to said either of said reference display subsystem or said target display subsystem; (iv) applies said drawing instructions to the other of either said reference display subsystem or said target display subsystem; (v) stores image data generated by the other of said either reference display subsystem or said target display subsystem resulting from the application of said image data to the other of either said reference display subsystem and said target display subsystem; and (vi) compares said stored image data generated by said reference display subsystem and by said target display subsystem to determine if said target display subsystem is compliant with said reference display subsystem.