US Patent 7407247 Controller which generates data suitable for inkjet printhead

A print controller for an inkjet printhead is provided. The print controller has contone decompression circuitry for decompressing a contone layer of compressed page data, bi-level decompression circuitry for decompressing a bi-level layer of the compressed page data, halftoner and compositor circuitry for halftoning the decompressed contone planes to associated bi-level versions and compositing the decompressed bi-level layer over the halftoned contone layers, and printhead interface circuitry for receiving the halftoned and composited data so as to generate print data suitable for printing by the printhead.