Settings for monotone printing and color printing

A computer-readable medium storing a printer driver program executed on a computer, characterized in that:

• the printer driver program has a monotone printing mode and a color printing mode,
• an average pass count that is an average value of scan pass counts of ink nozzles on each scan line are respectively set to 1 or greater for the monotone printing mode and the color printing mode, and
• the average pass count for the monotone printing mode is set to be a larger value than the average pass count for the color printing mode under printing conditions which use an identical print medium and an identical printing resolution for the monotone printing mode and the color printing mode,
• the computer-readable medium further comprising:
• a print data generating module configured to generate printing data from image data according to the printing conditions, the print data generating module including
• a scanning method storage module configured to store in advance a first scanning method for the monotone printing mode and a second scanning method for the color printing mode,
• a color conversion module configured to convert the image data to ink amount data using a color conversion lookup table,
• a halftone processing module configured to generate dot data representing dot formation status at each pixel by executing halftone processing on the ink amount data, and
• a data alignment module configured to read out the scanning method from the scanning method storage module according to the printing conditions and to adjust alignment of the dot data according to the read scanning method.