Method for selecting interpreters for PDF direct printing

摘要

A method implemented in a printer for PDF direct printing. The printer includes a PDF interpreter such as APPE (Adobe PDF Print Engine), and at least one other interpreter also capable of interpreting PDF data, such as a PostScript interpreter. The printer automatically selects either APPE or the PS interpreter or both to interpret a PDF document. If the PDF document is PDF/VT, PDF/X-4 or later, then APPE is selected. If the PDF document is not one of these versions but contains transparency data, APPE is selected to interpret the pages containing transparency data, and the other pages may be interpreted using the PS interpreter. If the PDF document is not one of the above versions and contains no transparency data, the PS interpreter is selected. Other factors such as the busy status of the interpreters may be considered in making the selection.

主权项

1. A method implemented in a printer for processing a PDF document for PDF direct printing, the printer including a first interpreter and a second interpreter, the method comprising:
(a) analyzing characteristics of the PDF document; (b) based on the analysis of step (a) and a busy or error status of the first and second interpreters, automatically selecting the first interpreter or the second interpreter or both interpreters concurrently to be used to interpret the PDF document; and (c) based on the selection of step (b), interpreting the PDF document using the selected interpreter or interpreters.