DRAWING DATA GENERATION DEVICE AND DRAWING DEVICE

摘要

A drawing data generation device performs an integration process on map data so as to integrate line data for drawing linear features such as roads, such that a drawing speed of a map image is improved. The line data is grouped by the line type and the line width. The integration process links thin solid lines L1 and L3 by a non-display line LA1, and links thick solid lines L2, L4 and L5 by non-display lines LA2 and LA3, for example, so as to integrate the line data of a plurality of lines into integrated line data for an integral line formed of linked lines in a same group. Drawing a map using the map data in which the line data is integrated reduces the call counts for a line function for drawing lines provided in a graphics, thereby shortening

主权项

1. A drawing data generation device that generates drawing data for drawing an image using a graphics library, wherein
the graphics library has a line function that sequentially connects points specified by line data to draw a line, the drawing data generation device comprising: an original database that stores original data to be drawn; and a line data integrator that integrates a plurality of line data among the original data to line data of one integral line, wherein the line data integrator extracts a plurality of line data, which share a common setting of the line function for drawing, among line data included in the original data, and the line data integrator generates data to link end points spatially away from each other among end points of the line data by a hidden line, so as to connect and integrate the plurality of extracted line data to line data of one integral line.