selDisplayInPix(SEL     *sel,
                l_int32  size,
                l_int32  gthick)
{
l_int32  i, j, w, h, sx, sy, cx, cy, type, width;
l_int32  radius1, radius2, shift1, shift2, x0, y0;
PIX     *pixd, *pix2, *pixh, *pixm, *pixorig;
PTA     *pta1, *pta2, *pta1t, *pta2t;

    PROCNAME("selDisplayInPix");

    if (!sel)
        return (PIX *)ERROR_PTR("sel not defined", procName, NULL);
    if (size < 13) {
        L_WARNING("size < 13; setting to 13\n", procName);
        size = 13;
    }
    if (size % 2 == 0)
        size++;
    if (gthick < 2) {
        L_WARNING("grid thickness < 2; setting to 2\n", procName);
        gthick = 2;
    }
    selGetParameters(sel, &sy, &sx, &cy, &cx);
    w = size * sx + gthick * (sx + 1);
    h = size * sy + gthick * (sy + 1);
    pixd = pixCreate(w, h, 1);

        /* Generate grid lines */
    for (i = 0; i <= sy; i++)
        pixRenderLine(pixd, 0, gthick / 2 + i * (size + gthick),
                      w - 1, gthick / 2 + i * (size + gthick),
                      gthick, L_SET_PIXELS);
    for (j = 0; j <= sx; j++)
        pixRenderLine(pixd, gthick / 2 + j * (size + gthick), 0,
                      gthick / 2 + j * (size + gthick), h - 1,
                      gthick, L_SET_PIXELS);

        /* Generate hit and miss patterns */
    radius1 = (l_int32)(0.85 * ((size - 1) / 2.0) + 0.5);  /* of hit */
    radius2 = (l_int32)(0.65 * ((size - 1) / 2.0) + 0.5);  /* of inner miss */
    pta1 = generatePtaFilledCircle(radius1);
    pta2 = generatePtaFilledCircle(radius2);
    shift1 = (size - 1) / 2 - radius1;  /* center circle in square */
    shift2 = (size - 1) / 2 - radius2;
    pta1t = ptaTransform(pta1, shift1, shift1, 1.0, 1.0);
    pta2t = ptaTransform(pta2, shift2, shift2, 1.0, 1.0);
    pixh = pixGenerateFromPta(pta1t, size, size);  /* hits */
    pix2 = pixGenerateFromPta(pta2t, size, size);
    pixm = pixSubtract(NULL, pixh, pix2);

        /* Generate crossed lines for origin pattern */
    pixorig = pixCreate(size, size, 1);
    width = size / 8;
    pixRenderLine(pixorig, size / 2, (l_int32)(0.12 * size),
                           size / 2, (l_int32)(0.88 * size),
                           width, L_SET_PIXELS);
    pixRenderLine(pixorig, (l_int32)(0.15 * size), size / 2,
                           (l_int32)(0.85 * size), size / 2,
                           width, L_FLIP_PIXELS);
    pixRasterop(pixorig, size / 2 - width, size / 2 - width,
                2 * width, 2 * width, PIX_NOT(PIX_DST), NULL, 0, 0);

        /* Specialize origin pattern for this sel */
    selGetTypeAtOrigin(sel, &type);
    if (type == SEL_HIT)
        pixXor(pixorig, pixorig, pixh);
    else if (type == SEL_MISS)
        pixXor(pixorig, pixorig, pixm);

        /* Paste the patterns in */
    y0 = gthick;
    for (i = 0; i < sy; i++) {
        x0 = gthick;
        for (j = 0; j < sx; j++) {
            selGetElement(sel, i, j, &type);
            if (i == cy && j == cx)  /* origin */
                pixRasterop(pixd, x0, y0, size, size, PIX_SRC, pixorig, 0, 0);
            else if (type == SEL_HIT)
                pixRasterop(pixd, x0, y0, size, size, PIX_SRC, pixh, 0, 0);
            else if (type == SEL_MISS)
                pixRasterop(pixd, x0, y0, size, size, PIX_SRC, pixm, 0, 0);
            x0 += size + gthick;
        }
        y0 += size + gthick;
    }

    pixDestroy(&pix2);
    pixDestroy(&pixh);
    pixDestroy(&pixm);
    pixDestroy(&pixorig);
    ptaDestroy(&pta1);
    ptaDestroy(&pta1t);
    ptaDestroy(&pta2);
    ptaDestroy(&pta2t);
    return pixd;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.