726 void TraceConvexHull(PointInfo *vertices,size_t number_vertices,  in TraceConvexHull()  argument
744   for (i=0; i < (ssize_t) number_vertices; i++)  in TraceConvexHull()
752   for (i=(ssize_t) number_vertices-2; i >= 0; i--)  in TraceConvexHull()
763   size_t *number_vertices,ExceptionInfo *exception)  in GetImageConvexHull()  argument
796   *number_vertices=0;  in GetImageConvexHull()
851   TraceConvexHull(vertices,n,&monotone_chain,number_vertices);  in GetImageConvexHull()
852   convex_hull=(PointInfo *) AcquireQuantumMemory(*number_vertices,  in GetImageConvexHull()
855     for (n=0; n < *number_vertices; n++)  in GetImageConvexHull()
1200   size_t *number_vertices,ExceptionInfo *exception)  in GetImageMinimumBoundingBox()  argument
1230   *number_vertices=0;  in GetImageMinimumBoundingBox()
1234   *number_vertices=4;  in GetImageMinimumBoundingBox()
1235   bounding_box=(PointInfo *) AcquireQuantumMemory(*number_vertices,  in GetImageMinimumBoundingBox()