Patent ID: 8310713

Claim:
An image forming device for receiving a document file that has not been converted into a printer-recognizable Page Description Language (PDL) format for direct printing and forming printable images of said document file, wherein said document file contains a plurality of pages and a plurality of unconverted objects for displaying a part or all of the contents of each page of the document and being capable of lining up in the file regardless of the order of said contents displayed in said document, comprising: a receiving unit for successively receiving unconverted constituent data of said document file from an external device; a storing unit for successively storing said objects contained in said unconverted constituent data received by said receiving unit; a judging unit for judging whether all objects necessary for displaying a specific page out of the plurality of objects included in the document file are stored in said storing unit; and an image forming unit for forming images of said specific page before all of the unconverted constituent data of the document file have been received from the external device when: the unconverted objects are not arranged according to page number of the document file, it is judged by said judging unit that all objects necessary for displaying said specific page are stored in said storing unit, and all of the plurality of objects included in the document file have not yet been stored in said storing unit.