Patent ID: 8477368

Claim:
A printing apparatus comprising: a print drawing data storage unit storing first print drawing data included in print drawing data received from a print data generation apparatus that is an external device; the print data generation apparatus including: a pattern data registration unit registering pattern data corresponding to first image information prepared based on an image formed in a first region on a recording medium capable of being read by an electronic pen obtaining handwriting data with a movement of a pen tip; a pattern data conversion unit converting the first image information into corresponding pattern data from the pattern data registered in the pattern data registration unit; a first image conversion unit converting the pattern data converted by the pattern data conversion unit into the first print drawing data drawn with a first color material to be optically read by the electronic pen; a second image conversion unit converting a second image information prepared based an image formed in a second region on the recording medium into second print drawing data drawn with a second color material; and an image composition unit combining the first print drawing data converted by the first image conversion unit and the second print drawing data converted by the second image conversion unit, an administration information unit storing administration information relating to the first print drawing data; and an image processing unit determining whether or not administration information relating to first print drawing data newly received and the administration information relating to the first drawing data already stored in the administration information unit are the same, and combining the first print drawing data already stored in the print drawing data storage unit and the second print drawing data received in a case where the administration information relating to the first print drawing data newly received and the administration information relating to the first print drawing data already stored in the administration information unit are the same.