Patent ID: 8907955

Claim:
A vector image drawing device comprising: a contour generation unit that, based on vector data, generates contour data that represents starting pixels on a scan line in a drawing area where fill-in starts, and ending pixels where fill-in ends; an outline buffer that stores the number of starting or ending fill-in points of the contour data for each drawn pixel; a judgment unit that, when storing the contour data in the outline buffer, determines in which pixel there is overflow in the outline buffer of contour data; and a setting unit that adds the numerical value of the overflow portion of a pixel that the judgment unit determined to have overflow to the numerical value of contour data that corresponds to a pixel adjacent to the pixel in which overflow occurred, wherein the contour generation unit comprises a drawing processing unit that: generates numerical values for data representing the start of fill-in and data representing the end of fill-in such that the signs differ from each other, sequentially adds contour data stored in the outline buffer for each pixel along a scan line in the drawing area, and generates drawing data for each pixel that indicates whether or not fill-in is performed.