Print control device, print control method, and print control program

A print control method for a computer in which a standard print control unit functioning by execution of an operating system causes a printer to execute printing according to print data via a standard communication control unit functioning by the execution of the operating system, the print control method comprising:

• a custom processing step in which the computer executes a custom class driver for hiding the function of the standard communication control unit and for customizing processing of causing the printer to execute the printing, based on the print data delivered from the standard print control unit;
• and
• a print management step in which the computer executes processing of attaching an identifier to the print data that goes through the custom class driver and delivering the print data with the identifier attached, to the standard print control unit, wherein
• in the custom processing step, when the identifier is attached to the print data delivered from the standard print control unit, the computer deletes the identifier from the print data and customizes the processing of causing the printer to execute the printing, based on the print data, and
• in the print management step, the computer detects a read state of the custom class driver by the execution of the operating system, and when the read state indicates a failure in reading the custom class driver, the computer delivers the print data without the identifier attached, to the standard print control unit, and thus causes the printer to execute the printing that is limited via the standard communication control unit or to stop the printing.

A non-transitory computer-readable storage medium storing a print control program, the print control program being for a computer in which a standard print control function that an operating system causes the computer to implement causes a printer to execute printing according to print data via a standard communication control function that the operating system causes the computer to implement,

• the print control program including a custom class driver and a filter module, wherein
• the custom class driver causes the computer to implement a custom processing function for hiding the standard communication control function and for customizing processing of causing the printer to execute the printing, based on the print data delivered from the standard print control function,
• the filter module causes the computer to implement a print management function for attaching an identifier to the print data that goes through the custom class driver and for delivering the print data with the identifier attached, to the standard print control function,
• when the identifier is attached to the print data delivered from the standard print control function, the custom processing function deletes the identifier from the print data and customizes the processing of causing the printer to execute the printing, based on the print data, and
• the print management function detects a read state of the custom class driver by the execution of the operating system, and when the read state indicates a failure in reading the custom class driver, the print management function delivers the print data without the identifier attached, to the standard print control function, and thus causes the printer to execute the printing that is limited via the standard communication control function or to stop the printing.