--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/jbig2dec/jbig2_text.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,81 @@
+/* Copyright (C) 2001-2023 Artifex Software, Inc.
+   All Rights Reserved.
+
+   This software is provided AS-IS with no warranty, either express or
+   implied.
+
+   This software is distributed under license and may not be copied,
+   modified or distributed except as expressly authorized under the terms
+   of the license contained in the file LICENSE in this distribution.
+
+   Refer to licensing information at http://www.artifex.com or contact
+   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,
+   CA 94129, USA, for further information.
+*/
+
+/*
+    jbig2dec
+*/
+
+#ifndef _JBIG2_TEXT_H
+#define _JBIG2_TEXT_H
+
+/**
+ * Headers for Text region handling
+ **/
+
+typedef enum {
+    JBIG2_CORNER_BOTTOMLEFT = 0,
+    JBIG2_CORNER_TOPLEFT = 1,
+    JBIG2_CORNER_BOTTOMRIGHT = 2,
+    JBIG2_CORNER_TOPRIGHT = 3
+} Jbig2RefCorner;
+
+typedef struct {
+    bool SBHUFF;
+    bool SBREFINE;
+    bool SBDEFPIXEL;
+    Jbig2ComposeOp SBCOMBOP;
+    bool TRANSPOSED;
+    Jbig2RefCorner REFCORNER;
+    int SBDSOFFSET;
+    /* int SBW; */
+    /* int SBH; */
+    uint32_t SBNUMINSTANCES;
+    int LOGSBSTRIPS;
+    int SBSTRIPS;
+    /* int SBNUMSYMS; */
+    /* SBSYMCODES */
+    /* SBSYMCODELEN */
+    /* SBSYMS */
+    Jbig2HuffmanTable *SBHUFFFS;
+    Jbig2HuffmanTable *SBHUFFDS;
+    Jbig2HuffmanTable *SBHUFFDT;
+    Jbig2HuffmanTable *SBHUFFRDW;
+    Jbig2HuffmanTable *SBHUFFRDH;
+    Jbig2HuffmanTable *SBHUFFRDX;
+    Jbig2HuffmanTable *SBHUFFRDY;
+    Jbig2HuffmanTable *SBHUFFRSIZE;
+    Jbig2ArithIntCtx *IADT;
+    Jbig2ArithIntCtx *IAFS;
+    Jbig2ArithIntCtx *IADS;
+    Jbig2ArithIntCtx *IAIT;
+    Jbig2ArithIaidCtx *IAID;
+    Jbig2ArithIntCtx *IARI;
+    Jbig2ArithIntCtx *IARDW;
+    Jbig2ArithIntCtx *IARDH;
+    Jbig2ArithIntCtx *IARDX;
+    Jbig2ArithIntCtx *IARDY;
+    bool SBRTEMPLATE;
+    int8_t sbrat[4];
+} Jbig2TextRegionParams;
+
+int
+jbig2_decode_text_region(Jbig2Ctx *ctx, Jbig2Segment *segment,
+                         const Jbig2TextRegionParams *params,
+                         const Jbig2SymbolDict *const *dicts, const uint32_t n_dicts,
+                         Jbig2Image *image, const byte *data, const size_t size, Jbig2ArithCx *GR_stats, Jbig2ArithState *as, Jbig2WordStream *ws);
+
+int jbig2_text_region(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);
+
+#endif /* _JBIG2_TEXT_H */