Function kernelCreateFromString

deps/leptonica/src/kernel.c:678–723

----------------------------------------------------------------------* * Making a kernel from a compiled string * *----------------------------------------------------------------------*/ ! * \brief kernelCreateFromString() * * \param[in] h, w height, width * \param[in] cy, cx origin * \param[in] kdata * \return kernel of the given size, or

 * </pre>
 */
L_KERNEL *
kernelCreateFromString(l_int32      h,
                       l_int32      w,
                       l_int32      cy,
                       l_int32      cx,
                       const char  *kdata)
{
l_int32    n, i, j, index;
l_float32  val;
L_KERNEL  *kel;
NUMA      *na;

    PROCNAME("kernelCreateFromString");

    if (h < 1)
        return (L_KERNEL *)ERROR_PTR("height must be > 0", procName, NULL);
    if (w < 1)
        return (L_KERNEL *)ERROR_PTR("width must be > 0", procName, NULL);
    if (cy < 0 || cy >= h)
        return (L_KERNEL *)ERROR_PTR("cy invalid", procName, NULL);
    if (cx < 0 || cx >= w)
        return (L_KERNEL *)ERROR_PTR("cx invalid", procName, NULL);

    kel = kernelCreate(h, w);
    kernelSetOrigin(kel, cy, cx);
    na = parseStringForNumbers(kdata, " \t\n");
    n = numaGetCount(na);
    if (n != w * h) {
        kernelDestroy(&kel);
        numaDestroy(&na);
        fprintf(stderr, "w = %d, h = %d, num ints = %d\n", w, h, n);
        return (L_KERNEL *)ERROR_PTR("invalid integer data", procName, NULL);
    }

    index = 0;
    for (i = 0; i < h; i++) {
        for (j = 0; j < w; j++) {
            numaGetFValue(na, index, &val);
            kernelSetElement(kel, i, j, val);
            index++;
        }
    }

    numaDestroy(&na);
    return kel;
}


/*----------------------------------------------------------------------*