1. An image processing apparatus comprising: a drawing control unit adapted to handle a page of drawing data as a set of pieces of drawing data, the set of pieces of drawing data corresponding to a plurality of areas into which a page of image is segmented; and a rendering unit adapted to render drawing data of each segmented area, wherein the drawing control unit holds information used to determine a rendering resolution in association with a drawing object in each segmented area, and the rendering unit determines, based on the information, that the rendering resolution of a segmented area of the plurality of areas which includes a first drawing object is a first resolution and the rendering resolution of a segmented area of the plurality of areas which does not include the first drawing object is a second resolution which is lower than the first resolution, and renders the drawing data in the each segmented area with the determined rendering resolution, wherein, when the drawing data of the segmented area which includes the first drawing object is rendered, a position of an edge of the first drawing object is determined by drawing in a one-pixel unit and a position of an edge of another drawing object other than the first drawing object in the drawing data of the segmented area is determined by drawing in a plural-pixel unit.