--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/leptonica/src/fliphmtgen.c.notused	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,367 @@
+/*====================================================================*
+ -  Copyright (C) 2001 Leptonica.  All rights reserved.
+ -
+ -  Redistribution and use in source and binary forms, with or without
+ -  modification, are permitted provided that the following conditions
+ -  are met:
+ -  1. Redistributions of source code must retain the above copyright
+ -     notice, this list of conditions and the following disclaimer.
+ -  2. Redistributions in binary form must reproduce the above
+ -     copyright notice, this list of conditions and the following
+ -     disclaimer in the documentation and/or other materials
+ -     provided with the distribution.
+ -
+ -  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ -  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ -  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ -  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ANY
+ -  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ -  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ -  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ -  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ -  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ -  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *====================================================================*/
+
+/*
+ *    fliphmtgen.c.notused
+ *
+ *                                  NOTE
+ *    ================================================================
+ *    This code has been retired from the library, along with the code
+ *    in flipdetectdwa.c which uses it.  It is no longer compiled.
+ *    ================================================================
+ *
+ *       DWA implementation of hit-miss transforms with auto-generated sels
+ *       for pixOrientDetectDwa() and pixUpDownDetectDwa() in
+ *       flipdetectdwa.c
+ *
+ *            PIX             *pixFlipFHMTGen()
+ *              static l_int32   flipfhmtgen_low()  -- dispatcher
+ *                static void      fhmt_1_0()
+ *                static void      fhmt_1_1()
+ *                static void      fhmt_1_2()
+ *                static void      fhmt_1_3()
+ *
+ *       The code (slightly rearranged) was generated by prog/flipselgen.c
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config_auto.h>
+#endif  /* HAVE_CONFIG_H */
+
+#include <string.h>
+#include "allheaders.h"
+
+static l_int32   NUM_SELS_GENERATED = 4;
+static char  SEL_NAMES[][10] = {"flipsel1",
+                                "flipsel2",
+                                "flipsel3",
+                                "flipsel4"};
+
+static l_int32 flipfhmtgen_low(l_uint32 *, l_int32, l_int32, l_int32,
+                               l_uint32 *, l_int32, l_int32);
+
+static void  fhmt_1_0(l_uint32 *, l_int32, l_int32, l_int32, l_uint32 *,
+                      l_int32);
+static void  fhmt_1_1(l_uint32 *, l_int32, l_int32, l_int32, l_uint32 *,
+                      l_int32);
+static void  fhmt_1_2(l_uint32 *, l_int32, l_int32, l_int32, l_uint32 *,
+                      l_int32);
+static void  fhmt_1_3(l_uint32 *, l_int32, l_int32, l_int32, l_uint32 *,
+                      l_int32);
+
+/*---------------------------------------------------------------------*
+ *                          Top-level hmt functions                    *
+ *---------------------------------------------------------------------*/
+/*
+ *  pixFlipFHMTGen()
+ *
+ *      Input:  pixd (usual 3 choices: null, == pixs, != pixs)
+ *              pixs
+ *              sel name (one of four defined in SEL_NAMES[])
+ *      Return: pixd
+ *
+ *  Notes:
+ *     Action: hit-miss transform on pixs by the sel
+ *     N.B.: the sel must have at least one hit, and it
+ *           can have any number of misses.
+ */
+PIX *
+pixFlipFHMTGen(PIX         *pixd,
+               PIX         *pixs,
+               const char  *selname)
+{
+l_int32    i, index, found, w, h, wpls, wpld;
+l_uint32  *datad, *datas, *datat;
+PIX       *pixt;
+
+    PROCNAME("pixFlipFHMTGen");
+
+    if (!pixs)
+        return (PIX *)ERROR_PTR("pixs not defined", procName, pixd);
+    if (pixGetDepth(pixs) != 1)
+        return (PIX *)ERROR_PTR("pixs must be 1 bpp", procName, pixd);
+
+    found = FALSE;
+    for (i = 0; i < NUM_SELS_GENERATED; i++) {
+        if (strcmp(selname, SEL_NAMES[i]) == 0) {
+            found = TRUE;
+            index = i;
+            break;
+        }
+    }
+    if (found == FALSE)
+        return (PIX *)ERROR_PTR("sel index not found", procName, pixd);
+
+    if (pixd) {
+        if (!pixSizesEqual(pixs, pixd))
+            return (PIX *)ERROR_PTR("sizes not equal", procName, pixd);
+    } else {
+        if ((pixd = pixCreateTemplate(pixs)) == NULL)
+            return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
+    }
+
+    wpls = pixGetWpl(pixs);
+    wpld = pixGetWpl(pixd);
+
+        /*  The images must be surrounded with ADDED_BORDER white pixels,
+         *  that we'll read from.  We fabricate a "proper"
+         *  image as the subimage within the border, having the
+         *  following parameters:  */
+    w = pixGetWidth(pixs) - 2 * ADDED_BORDER;
+    h = pixGetHeight(pixs) - 2 * ADDED_BORDER;
+    datas = pixGetData(pixs) + ADDED_BORDER * wpls + ADDED_BORDER / 32;
+    datad = pixGetData(pixd) + ADDED_BORDER * wpld + ADDED_BORDER / 32;
+
+    if (pixd == pixs) {  /* need temp image if in-place */
+        if ((pixt = pixCopy(NULL, pixs)) == NULL)
+            return (PIX *)ERROR_PTR("pixt not made", procName, pixd);
+        datat = pixGetData(pixt) + ADDED_BORDER * wpls + ADDED_BORDER / 32;
+        flipfhmtgen_low(datad, w, h, wpld, datat, wpls, index);
+        pixDestroy(&pixt);
+    } else {  /* simple and not in-place */
+        flipfhmtgen_low(datad, w, h, wpld, datas, wpls, index);
+    }
+
+    return pixd;
+}
+
+
+/*---------------------------------------------------------------------*
+ *                           Fast hmt dispatcher                       *
+ *---------------------------------------------------------------------*/
+/*
+ *  flipfhmtgen_low()
+ *
+ *       A dispatcher to appropriate low-level code for flip hmt ops
+ */
+static l_int32
+flipfhmtgen_low(l_uint32  *datad,
+                l_int32    w,
+                l_int32    h,
+                l_int32    wpld,
+                l_uint32  *datas,
+                l_int32    wpls,
+                l_int32    index)
+{
+
+    switch (index)
+    {
+    case 0:
+        fhmt_1_0(datad, w, h, wpld, datas, wpls);
+        break;
+    case 1:
+        fhmt_1_1(datad, w, h, wpld, datas, wpls);
+        break;
+    case 2:
+        fhmt_1_2(datad, w, h, wpld, datas, wpls);
+        break;
+    case 3:
+        fhmt_1_3(datad, w, h, wpld, datas, wpls);
+        break;
+    }
+
+    return 0;
+}
+
+
+/*--------------------------------------------------------------------------*
+ *                  Low-level auto-generated hmt routines                   *
+ *--------------------------------------------------------------------------*/
+/*
+ *  N.B.  in all the low-level routines, the part of the image
+ *        that is accessed has been clipped by ADDED_BORDER pixels
+ *        on all four sides.  This is done in the higher level
+ *        code by redefining w and h smaller and by moving the
+ *        start-of-image pointers up to the beginning of this
+ *        interior rectangle.
+ */
+
+static void
+fhmt_1_0(l_uint32  *datad,
+         l_int32    w,
+         l_int32    h,
+         l_int32    wpld,
+         l_uint32  *datas,
+         l_int32    wpls)
+{
+l_int32    i;
+l_int32    j, pwpls;
+l_uint32  *sptr, *dptr;
+l_int32    wpls2, wpls3;
+
+    wpls2 = 2 * wpls;
+    wpls3 = 3 * wpls;
+    pwpls = (l_uint32)(w + 31) / 32;  /* proper wpl of src */
+
+    for (i = 0; i < h; i++) {
+        sptr = datas + i * wpls;
+        dptr = datad + i * wpld;
+        for (j = 0; j < pwpls; j++, sptr++, dptr++) {
+            *dptr = ((*(sptr - wpls) >> 3) | (*(sptr - wpls - 1) << 29)) &
+                    (~*(sptr - wpls)) &
+                    ((~*(sptr - wpls) << 1) | (~*(sptr - wpls + 1) >> 31)) &
+                    ((*(sptr) >> 3) | (*(sptr - 1) << 29)) &
+                    ((~*(sptr) >> 1) | (~*(sptr - 1) << 31)) &
+                    (~*sptr) &
+                    ((~*(sptr) << 1) | (~*(sptr + 1) >> 31)) &
+                    ((*(sptr + wpls) >> 3) | (*(sptr + wpls - 1) << 29)) &
+                    (~*(sptr + wpls)) &
+                    ((*(sptr + wpls2) >> 3) | (*(sptr + wpls2 - 1) << 29)) &
+                    ((*(sptr + wpls3) >> 3) | (*(sptr + wpls3 - 1) << 29)) &
+                    ((*(sptr + wpls3) >> 2) | (*(sptr + wpls3 - 1) << 30)) &
+                    ((*(sptr + wpls3) >> 1) | (*(sptr + wpls3 - 1) << 31)) &
+                    (*(sptr + wpls3)) &
+                    ((*(sptr + wpls3) << 1) | (*(sptr + wpls3 + 1) >> 31)) &
+                    ((*(sptr + wpls3) << 2) | (*(sptr + wpls3 + 1) >> 30));
+        }
+    }
+}
+
+
+static void
+fhmt_1_1(l_uint32  *datad,
+         l_int32    w,
+         l_int32    h,
+         l_int32    wpld,
+         l_uint32  *datas,
+         l_int32    wpls)
+{
+l_int32    i;
+l_int32    j, pwpls;
+l_uint32  *sptr, *dptr;
+l_int32    wpls2, wpls3;
+
+    wpls2 = 2 * wpls;
+    wpls3 = 3 * wpls;
+    pwpls = (l_uint32)(w + 31) / 32;  /* proper wpl of src */
+
+    for (i = 0; i < h; i++) {
+        sptr = datas + i * wpls;
+        dptr = datad + i * wpld;
+        for (j = 0; j < pwpls; j++, sptr++, dptr++) {
+            *dptr = ((~*(sptr - wpls) >> 1) | (~*(sptr - wpls - 1) << 31)) &
+                    (~*(sptr - wpls)) &
+                    ((*(sptr - wpls) << 3) | (*(sptr - wpls + 1) >> 29)) &
+                    ((~*(sptr) >> 1) | (~*(sptr - 1) << 31)) &
+                    (~*sptr) &
+                    ((~*(sptr) << 1) | (~*(sptr + 1) >> 31)) &
+                    ((*(sptr) << 3) | (*(sptr + 1) >> 29)) &
+                    (~*(sptr + wpls)) &
+                    ((*(sptr + wpls) << 3) | (*(sptr + wpls + 1) >> 29)) &
+                    ((*(sptr + wpls2) << 3) | (*(sptr + wpls2 + 1) >> 29)) &
+                    ((*(sptr + wpls3) >> 2) | (*(sptr + wpls3 - 1) << 30)) &
+                    ((*(sptr + wpls3) >> 1) | (*(sptr + wpls3 - 1) << 31)) &
+                    (*(sptr + wpls3)) &
+                    ((*(sptr + wpls3) << 1) | (*(sptr + wpls3 + 1) >> 31)) &
+                    ((*(sptr + wpls3) << 2) | (*(sptr + wpls3 + 1) >> 30)) &
+                    ((*(sptr + wpls3) << 3) | (*(sptr + wpls3 + 1) >> 29));
+        }
+    }
+}
+
+
+static void
+fhmt_1_2(l_uint32  *datad,
+         l_int32    w,
+         l_int32    h,
+         l_int32    wpld,
+         l_uint32  *datas,
+         l_int32    wpls)
+{
+l_int32    i;
+l_int32    j, pwpls;
+l_uint32  *sptr, *dptr;
+l_int32    wpls2, wpls3;
+
+    wpls2 = 2 * wpls;
+    wpls3 = 3 * wpls;
+    pwpls = (l_uint32)(w + 31) / 32;  /* proper wpl of src */
+
+    for (i = 0; i < h; i++) {
+        sptr = datas + i * wpls;
+        dptr = datad + i * wpld;
+        for (j = 0; j < pwpls; j++, sptr++, dptr++) {
+            *dptr = ((*(sptr - wpls3) >> 3) | (*(sptr - wpls3 - 1) << 29)) &
+                    ((*(sptr - wpls3) >> 2) | (*(sptr - wpls3 - 1) << 30)) &
+                    ((*(sptr - wpls3) >> 1) | (*(sptr - wpls3 - 1) << 31)) &
+                    (*(sptr - wpls3)) &
+                    ((*(sptr - wpls3) << 1) | (*(sptr - wpls3 + 1) >> 31)) &
+                    ((*(sptr - wpls3) << 2) | (*(sptr - wpls3 + 1) >> 30)) &
+                    ((*(sptr - wpls2) >> 3) | (*(sptr - wpls2 - 1) << 29)) &
+                    ((*(sptr - wpls) >> 3) | (*(sptr - wpls - 1) << 29)) &
+                    (~*(sptr - wpls)) &
+                    ((*(sptr) >> 3) | (*(sptr - 1) << 29)) &
+                    ((~*(sptr) >> 1) | (~*(sptr - 1) << 31)) &
+                    (~*sptr) &
+                    ((~*(sptr) << 1) | (~*(sptr + 1) >> 31)) &
+                    ((*(sptr + wpls) >> 3) | (*(sptr + wpls - 1) << 29)) &
+                    (~*(sptr + wpls)) &
+                    ((~*(sptr + wpls) << 1) | (~*(sptr + wpls + 1) >> 31));
+        }
+    }
+}
+
+
+static void
+fhmt_1_3(l_uint32  *datad,
+         l_int32    w,
+         l_int32    h,
+         l_int32    wpld,
+         l_uint32  *datas,
+         l_int32    wpls)
+{
+l_int32    i;
+l_int32    j, pwpls;
+l_uint32  *sptr, *dptr;
+l_int32    wpls2, wpls3;
+
+    wpls2 = 2 * wpls;
+    wpls3 = 3 * wpls;
+    pwpls = (l_uint32)(w + 31) / 32;  /* proper wpl of src */
+
+    for (i = 0; i < h; i++) {
+        sptr = datas + i * wpls;
+        dptr = datad + i * wpld;
+        for (j = 0; j < pwpls; j++, sptr++, dptr++) {
+            *dptr = ((*(sptr - wpls3) >> 2) | (*(sptr - wpls3 - 1) << 30)) &
+                    ((*(sptr - wpls3) >> 1) | (*(sptr - wpls3 - 1) << 31)) &
+                    (*(sptr - wpls3)) &
+                    ((*(sptr - wpls3) << 1) | (*(sptr - wpls3 + 1) >> 31)) &
+                    ((*(sptr - wpls3) << 2) | (*(sptr - wpls3 + 1) >> 30)) &
+                    ((*(sptr - wpls3) << 3) | (*(sptr - wpls3 + 1) >> 29)) &
+                    ((*(sptr - wpls2) << 3) | (*(sptr - wpls2 + 1) >> 29)) &
+                    (~*(sptr - wpls)) &
+                    ((*(sptr - wpls) << 3) | (*(sptr - wpls + 1) >> 29)) &
+                    ((~*(sptr) >> 1) | (~*(sptr - 1) << 31)) &
+                    (~*sptr) &
+                    ((~*(sptr) << 1) | (~*(sptr + 1) >> 31)) &
+                    ((*(sptr) << 3) | (*(sptr + 1) >> 29)) &
+                    ((~*(sptr + wpls) >> 1) | (~*(sptr + wpls - 1) << 31)) &
+                    (~*(sptr + wpls)) &
+                    ((*(sptr + wpls) << 3) | (*(sptr + wpls + 1) >> 29));
+        }
+    }
+}