GRASS png display driver - header file.
void path_close(struct path *p)
void path_cont(struct path *p, double x, double y)
void PNG_Move(double x, double y)
void path_move(struct path *p, double x, double y)
void png_draw_line(double x1, double y1, double x2, double y2)
void png_polygon(struct path *)
Draw polygon.
void PNG_Cont(double x, double y)
void path_begin(struct path *p)
void path_stroke(struct path *p, void(*line)(double, double, double, double))