Printing apparatus for bit map data in unit of page

Claim 1

A printing apparatus capable of printing on both sides of a print sheet, comprising: developing means for developing received print data into dot data in a development memory, the print data including data for printing on both sides of a single sheet; input means for inputting first designation information and second designation information; first determination means for determining the direction in which the received print data is to be printed on a print sheet, in response to the first designation information input by said input means; second determination means for determining on which side of a print sheet the developed dot data is to be printed first, in response to the second designation information input by said input means; and control means for controlling data output from the development memory in response to an output from said first determination means, and for controlling the development of the received print data so that dot data for one of the two sides of a print sheet is developed before the dot data for the other side in accordance with the output of said second determination means, wherein in developing print data on a certain print sheet, said control means determines whether the print data is to be developed from a top-and-left edge or a bottom-and-right edge of the certain print sheet, the determination by said control means being made in accordance with a combination of the direction determined by said first determination means and the side of the print sheet determined by said second determination means.