1. A method for comparing a pixel against one or more windows using a pipeline, the method comprising: passing said pixel through the pipeline, wherein said pipeline comprises two or more pipeline segments; computing window result in each one of said two or more pipeline segments, wherein each one of said two or more pipeline segments corresponds to one of said one or more windows, wherein said window result comprises an indication of inclusion of said pixel within the corresponding one of said one or more windows; outputting a window word from each one of said two or more pipeline segments, wherein said outputting said window word comprises, for each of said two or more pipeline segments except for a last pipeline segment, passing said window word to next pipeline segment, wherein said window word comprises said window result and previous window result; and examining said window word available in the last pipeline segment.