Patent ID: 6778292
Filing Date: 2004-08-17
Classification: G06F,G06K

Abstract:
A printer host which comprises an auxiliary storage unit and a main storage unit, and expands a bundle of drawing commands of one page stored, as a spool file, in the auxiliary storage unit, into image data for each of bands having a predetermined band width, the printer host further comprising:list-forming means for forming a band-corresponded drawing command list showing correspondence of each of the drawing commands to the band or bands, by making reference to the spool file stored in the auxiliary storage unit; drawing command storage region which is a portion of the main storage unit and stores therein the drawing command of one band; an image data expanding region which is another portion of the main storage unit and in which the image data of one band is expanded; drawing command storage control means which successively reads out the drawing commands corresponding to the respective bands from the spool file stored in the auxiliary storage unit according to the band-corresponded drawing command list, and stores the drawing command, of only one band that is read out, in the drawing command storage region; and image data expanding means which converts the drawing command of one band stored in the drawing command storage region into image data and expands the image data in the image data expanding region.