--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/leptonica/src/watershed.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,64 @@
+/*====================================================================*
+ -  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.
+ *====================================================================*/
+
+#ifndef  LEPTONICA_WATERSHED_H
+#define  LEPTONICA_WATERSHED_H
+
+/*!
+ * \file watershed.h
+ *
+ *     Simple data structure to hold watershed data.
+ *     All data here is owned by the L_WShed and must be freed.
+ */
+
+/*! Simple data structure to hold watershed data. */
+struct L_WShed
+{
+    struct Pix    *pixs;      /*!< clone of input 8 bpp pixs                */
+    struct Pix    *pixm;      /*!< clone of input 1 bpp seed (marker) pixm  */
+    l_int32        mindepth;  /*!< minimum depth allowed for a watershed    */
+    struct Pix    *pixlab;    /*!< 16 bpp label pix                         */
+    struct Pix    *pixt;      /*!< scratch pix for computing wshed regions  */
+    void         **lines8;    /*!< line ptrs for pixs                       */
+    void         **linem1;    /*!< line ptrs for pixm                       */
+    void         **linelab32; /*!< line ptrs for pixlab                     */
+    void         **linet1;    /*!< line ptrs for pixt                       */
+    struct Pixa   *pixad;     /*!< result: 1 bpp pixa of watersheds         */
+    struct Pta    *ptas;      /*!< pta of initial seed pixels               */
+    struct Numa   *nasi;      /*!< numa of seed indicators; 0 if completed  */
+    struct Numa   *nash;      /*!< numa of initial seed heights             */
+    struct Numa   *namh;      /*!< numa of initial minima heights           */
+    struct Numa   *nalevels;  /*!< result: numa of watershed levels         */
+    l_int32        nseeds;    /*!< number of seeds (markers)                */
+    l_int32        nother;    /*!< number of minima different from seeds    */
+    l_int32       *lut;       /*!< lut for pixel indices                    */
+    struct Numa  **links;     /*!< back-links into lut, for updates         */
+    l_int32        arraysize; /*!< size of links array                      */
+    l_int32        debug;     /*!< set to 1 for debug output                */
+};
+typedef struct L_WShed L_WSHED;
+
+#endif  /* LEPTONICA_WATERSHED_H */