In a printer driver, combinations of standard print conditions and standard render data are saved as standard patterns, and combinations of standard print conditions and standard render data used for exceptional settings are saved as print application patterns. The print application patterns and the standard patterns are associated with each other. When printing document data, print condition data and render data are spooled by each page, the standard print conditions and the standard render data are compared, and a most similar standard pattern is detected. The print application pattern corresponding to the detected standard pattern is referred to, and print conditions are generated by combining standard print conditions and print conditions of the document data for each page. From the render data of the document data or from the standard render data, print data that can be processed by the printer is generated.