US Patent 7113309 Image processing method, image processing apparatus, and image processing system

An information processing method is provided in which bit-map data and attribute information for each pixel corresponding to the bit-map data are created by expanding a rendering command. In this method, the type of operation to be performed on the attribute information is determined based on logical operation processing specified for the rendering command. The logical operation processing for attribute information is created based on the determined type of operation. The attribute information is created by executing the logical operation processing. The attribute information is inverted if it possesses an inversion attribute.