Patent ID: 7227667

Claim:
A printer controller for delivering printing data to a color image forming device for forming a synthetic image in which a plurality of color images are superposed with one another, said printer controller comprising: a rasterizer that produces raster data as printing data; a skew corrector that corrects the raster data for a skew error of the color image forming device in accordance with a correction coefficient delivered from the color image forming device to provide skew-corrected raster data; a compression part that compresses the skew-corrected raster data to provide compressed raster data, and that provides the compressed raster data to a memory for storage therein; an expansion part that expands the stored compressed raster data so as to restore the skew-corrected raster data; a magnification corrector that corrects the skew-corrected raster data delivered from the expansion part for a magnification error of the color image forming device in accordance with a correction coefficient delivered from the color image forming device to provide skew and magnification-corrected raster data; and an interface section that provides the skew and magnification-corrected data to the color image forming device.