--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/jbig2dec/jbig2_halftone.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,59 @@
+/* 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_HALFTONE_H
+#define _JBIG2_HALFTONE_H
+
+typedef struct {
+    int n_patterns;
+    Jbig2Image **patterns;
+    uint32_t HPW, HPH;
+} Jbig2PatternDict;
+
+/* Table 24 */
+typedef struct {
+    bool HDMMR;
+    uint32_t HDPW;
+    uint32_t HDPH;
+    uint32_t GRAYMAX;
+    int HDTEMPLATE;
+} Jbig2PatternDictParams;
+
+/* Table 33 */
+typedef struct {
+    byte flags;
+    uint32_t HGW;
+    uint32_t HGH;
+    int32_t HGX;
+    int32_t HGY;
+    uint16_t HRX;
+    uint16_t HRY;
+    bool HMMR;
+    int HTEMPLATE;
+    bool HENABLESKIP;
+    Jbig2ComposeOp HCOMBOP;
+    bool HDEFPIXEL;
+} Jbig2HalftoneRegionParams;
+
+void jbig2_hd_release(Jbig2Ctx *ctx, Jbig2PatternDict *dict);
+
+int jbig2_halftone_region(Jbig2Ctx *ctx, Jbig2Segment *segment, const byte *segment_data);
+int jbig2_pattern_dictionary(Jbig2Ctx *ctx, Jbig2Segment *segment, const byte *segment_data);
+
+#endif /* _JBIG2_HALFTONE_H */