void cvFillConvexPoly(CvArr* img, CvPoint* pts, int npts, CvScalar color, int line_type, int shift) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvFillConvexPoly_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvFillConvexPoly, img, pts, npts, color, line_type, shift);
}
