1. An image processing apparatus that generates drawing data based on a drawing command, the drawing command including a background setting command that sets a background of the drawing data, the image processing apparatus comprising: a feature determining unit that determines a feature of a background for each line in the drawing command; and a background drawing unit that selects for each line a drawing method enabling a high-speed drawing process depending on the feature of that line, and draws drawing data corresponding to the background based on the background setting command and selected drawing method.