(...)
    /* coord[0]: finger1, coord[1]: finger2 */
    coord[0][0] = buf[0] + (buf[4]*256);
    coord[0][1] = buf[1] + (buf[5]*256);
    coord[1][0] = buf[2] + (buf[6]*256);
    coord[1][1] = buf[3] + (buf[7]*256);

    pressed = (coord[0][0]||coord[0][1]) ? 1 : 0;
    finger2_pressed = (coord[1][0]||coord[1][1]) ? 1: 0;

    if (!finger2_pressed) {
        /* No multitouch -- force width to zero */;
        width = 0;
        x = coord[0][0];
        y = coord[0][1];
    } else {
        /* (x,y) coords for multitouch are at midpt between fingers */
        x = (coord[0][0] + coord[1][0]) / 2;
        y = (coord[0][1] + coord[1][1]) / 2;

        /* Report the width according to the abs distance of x-axis */
        width = abs((coord[0][0] - coord[1][0]));
    }
(...)