Method of graphical generation of vectors with dark contours

摘要

The field of the invention is that of graphical libraries providing graphical functions used for the drawing of symbologic images. One of the fields of favored application is the generation of symbologic images for the piloting of aircraft. The object of the invention is to propose a method of graphical generation of a colored vector surrounded by a dark contour (H) on a background likewise colored as a single drawing, making it possible to preserve the function of antialiasing. The method uses two different mixing laws dependent on the position of the pixel of the vector with respect to the central axis of the vector. This method presents the following advantages: The calculations are optimized and successive writes to the buffer-memory are avoided; The dark contour is drawn at the same time as the vector of which it forms an integral part and thus becomes a functional state of the vector; The method takes into account the relative priority of the vectors with a single ordering logic.