A non-transitory storage medium storing a program that, when executed by a computer, causes the computer to execute a method of method of image processing by an image processing system for sequentially executing a plurality of processes, the image processing system including a first control apparatus capable of controlling an execution of the plurality of processes, the first control apparatus including a first drawing information generator for generating drawing information to which an image forming apparatus refers when performing an image generation-output operation based on information of a target image to be output, the second control apparatus capable of controlling an execution of the image generation-output operation based on command information of the image generation-output operation received from the first control apparatus, the second control apparatus including a plurality of second drawing information generators corresponding to the first drawing information generator, the method comprising:
- designating one or more of the second drawing information generators to be used for generating the drawing information based on the information of the target image to be output among the plurality of the second drawing information generator;
- converting one or more control parameters designated for generating the drawing information by using the designated one or more second drawing information generators depending on processing capability of the designated one or more second drawing information generators;
- and
- instructing the image forming apparatus to execute the image generation-output operation based on the drawing information generated by using the designated one or more second drawing information generators controlled by using the converted one or more control parameters,
- wherein when plural pages are to be condensed to a single page to be used for the image generation-output operation, the converting step converts the one or more control parameters depending on a data format processable by the second drawing information generator to be used for generating drawing information corresponding to each of the plural pages to be condensed as the single page.