Function ptaConvertToBox

deps/leptonica/src/boxfunc4.c:904–927

! * \brief ptaConvertToBox() * * \param[in] pta * \return box minimum containing all points in the pta, or NULL on error * * * Notes: * (1) For 2 corners, the order of the 2 points is UL, LR. * For 4 corners, the order of points is UL, UR, LL, LR. * */

 * </pre>
 */
BOX *
ptaConvertToBox(PTA  *pta)
{
l_int32  n, x1, y1, x2, y2, x3, y3, x4, y4, x, y, xmax, ymax;

    PROCNAME("ptaConvertToBox");

    if (!pta)
        return (BOX *)ERROR_PTR("pta not defined", procName, NULL);
    n = ptaGetCount(pta);
    ptaGetIPt(pta, 0, &x1, &y1);
    ptaGetIPt(pta, 1, &x2, &y2);
    if (n == 2)
        return boxCreate(x1, y1, x2 - x1 + 1, y2 - y1 + 1);

        /* 4 corners */
    ptaGetIPt(pta, 2, &x3, &y3);
    ptaGetIPt(pta, 3, &x4, &y4);
    x = L_MIN(x1, x3);
    y = L_MIN(y1, y2);
    xmax = L_MAX(x2, x4);
    ymax = L_MAX(y3, y4);
    return boxCreate(x, y, xmax - x + 1, ymax - y + 1);
}


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