--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/leptonica/src/jbclass.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,142 @@
+/*====================================================================*
+ -  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_JBCLASS_H
+#define  LEPTONICA_JBCLASS_H
+
+/*!
+ * \file jbclass.h
+ *
+ *       JbClasser
+ *       JbData
+ */
+
+
+    /*!
+     * <pre>
+     * The JbClasser struct holds all the data accumulated during the
+     * classification process that can be used for a compressed
+     * jbig2-type representation of a set of images.  This is created
+     * in an initialization process and added to as the selected components
+     * on each successive page are analyzed.
+     * </pre>
+     */
+struct JbClasser
+{
+    struct Sarray   *safiles;      /*!< input page image file names          */
+    l_int32          method;       /*!< JB_RANKHAUS, JB_CORRELATION          */
+    l_int32          components;   /*!< JB_CONN_COMPS, JB_CHARACTERS or      */
+                                   /*!< JB_WORDS                             */
+    l_int32          maxwidth;     /*!< max component width allowed          */
+    l_int32          maxheight;    /*!< max component height allowed         */
+    l_int32          npages;       /*!< number of pages already processed    */
+    l_int32          baseindex;    /*!< number components already processed  */
+                                   /*!< on fully processed pages             */
+    struct Numa     *nacomps;      /*!< number of components on each page    */
+    l_int32          sizehaus;     /*!< size of square struct elem for haus  */
+    l_float32        rankhaus;     /*!< rank val of haus match, each way     */
+    l_float32        thresh;       /*!< thresh value for correlation score   */
+    l_float32        weightfactor; /*!< corrects thresh value for heaver     */
+                                   /*!< components; use 0 for no correction  */
+    struct Numa     *naarea;       /*!< w * h of each template, without      */
+                                   /*!< extra border pixels                  */
+    l_int32          w;            /*!< max width of original src images     */
+    l_int32          h;            /*!< max height of original src images    */
+    l_int32          nclass;       /*!< current number of classes            */
+    l_int32          keep_pixaa;   /*!< If zero, pixaa isn't filled          */
+    struct Pixaa    *pixaa;        /*!< instances for each class; unbordered */
+    struct Pixa     *pixat;        /*!< templates for each class; bordered   */
+                                   /*!< and not dilated                      */
+    struct Pixa     *pixatd;       /*!< templates for each class; bordered   */
+                                   /*!< and dilated                          */
+    struct L_DnaHash *dahash;      /*!< Hash table to find templates by size */
+    struct Numa     *nafgt;        /*!< fg areas of undilated templates;     */
+                                   /*!< only used for rank < 1.0             */
+    struct Pta      *ptac;         /*!< centroids of all bordered cc         */
+    struct Pta      *ptact;        /*!< centroids of all bordered template cc */
+    struct Numa     *naclass;      /*!< array of class ids for each component */
+    struct Numa     *napage;       /*!< array of page nums for each component */
+    struct Pta      *ptaul;        /*!< array of UL corners at which the     */
+                                   /*!< template is to be placed for each    */
+                                   /*!< component                            */
+    struct Pta      *ptall;        /*!< similar to ptaul, but for LL corners */
+};
+typedef struct JbClasser  JBCLASSER;
+
+
+    /*!
+     * <pre>
+     * The JbData struct holds all the data required for
+     * the compressed jbig-type representation of a set of images.
+     * The data can be written to file, read back, and used
+     * to regenerate an approximate version of the original,
+     * which differs in two ways from the original:
+     *   (1) It uses a template image for each c.c. instead of the
+     *       original instance, for each occurrence on each page.
+     *   (2) It discards components with either a height or width larger
+     *       than the maximuma, given here by the lattice dimensions
+     *       used for storing the templates.
+     * </pre>
+     */
+struct JbData
+{
+    struct Pix      *pix;        /*!< template composite for all classes    */
+    l_int32          npages;     /*!< number of pages                       */
+    l_int32          w;          /*!< max width of original page images     */
+    l_int32          h;          /*!< max height of original page images    */
+    l_int32          nclass;     /*!< number of classes                     */
+    l_int32          latticew;   /*!< lattice width for template composite  */
+    l_int32          latticeh;   /*!< lattice height for template composite */
+    struct Numa     *naclass;    /*!< array of class ids for each component */
+    struct Numa     *napage;     /*!< array of page nums for each component */
+    struct Pta      *ptaul;      /*!< array of UL corners at which the      */
+                                 /*!< template is to be placed for each     */
+                                 /*!< component                             */
+};
+typedef struct JbData  JBDATA;
+
+
+/*! JB Classifier */
+enum {
+    JB_RANKHAUS = 0,
+    JB_CORRELATION = 1
+};
+
+    /*! For jbGetComponents(): type of component to extract from images */
+/*! JB Component */
+enum {
+    JB_CONN_COMPS = 0,
+    JB_CHARACTERS = 1,
+    JB_WORDS = 2
+};
+
+    /*! These parameters are used for naming the two files
+     * in which the jbig2-like compressed data is stored.  */
+#define   JB_TEMPLATE_EXT      ".templates.png"
+#define   JB_DATA_EXT          ".data"
+
+
+#endif  /* LEPTONICA_JBCLASS_H */