Printing system and printing apparatus

A printing system in which a computer provided with a printer driver is connected with a printing apparatus which runs a rendering process in response to print command data generated by said printer driver, wherein:

• said printer driver comprises data conversion means for converting drawing commands into an intermediate-language data format processible at high speed within said printing apparatus, data holding means for storing one page of the converted intermediate-language data, data information collection means for collecting attribute information about the intermediate-language data stored in the data holding means, and print data generation means for generating print data consisting of one page of intermediate-language data and intermediate-language data information;
• said printing apparatus comprises data extraction means for extracting the intermediate-language data and intermediate-language data information by interpreting the print data from said printer driver, page data holding means for storing one page of the intermediate-language data, print mode determination means for determining a print mode based on the intermediate-language data information extracted from the print data, and rendering means for running a rendering process using one page of the intermediate-language data in the print mode determined by the print mode determination means;
• when one page of intermediate-language data is stored in said data holding means, the print data generation means of said printer driver generates print data by adding the intermediate-language data information stored in said data holding means to the top of the page of the intermediate-language data;
• and
• the print mode determination means of said printing apparatus judges whether said intermediate-language data can fit in said page data holding means when said print data is converted in normal print mode and selects the normal print mode if the data-can fit in, but selects compressed print mode if the data cannot fit in.