Patent ID: 8520007

Claim:
A graphic drawing device comprising: a buffer circuit; and a processing circuit comprising: a curved line dividing unit for carrying out matrix transformation of apex coordinates and control point coordinates of a curved line represented by vector data of a graphic object, and for dividing the matrix-transformed curved line into minute line segments; a distance information generating unit for rasterizing the minute line segments through a combination of straight line cells and corner cells, for generating distance information corresponding to a pixel of a display by using a result of the rasterizing, and for storing the generated distance information into the buffer circuit, each of the corner cells being arranged to include a corner of the minute line segment and to partly overlap with the straight cell; an edge rasterizing unit for rasterizing edge information indicating a drawing direction of the minute line segments, and for storing the rasterized edge information into the buffer circuit; and a mapping unit for retrieving the distance information and the edge information with respect to each pixel of the cell combination from the buffer circuit, for determining whether said pixel is located inside or outside by using the retrieved edge information, for adjusting a distance value indicated by the retrieved distance information in accordance with a result of the determination, and for mapping the adjusted value of the distance information onto antialiasing intensity of a component included in said pixel.