--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/textord/underlin.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,54 @@
+/**********************************************************************
+ * File:        underlin.h  (Formerly undrline.h)
+ * Description: Code to chop blobs apart from underlines.
+ * Author:      Ray Smith
+ *
+ * (C) Copyright 1994, Hewlett-Packard Ltd.
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ *
+ **********************************************************************/
+
+#ifndef UNDERLIN_H
+#define UNDERLIN_H
+
+#include "fpchop.h"
+
+namespace tesseract {
+
+extern double_VAR_H(textord_underline_offset);
+extern BOOL_VAR_H(textord_restore_underlines);
+void restore_underlined_blobs( // get chop points
+    TO_BLOCK *block            // block to do
+);
+TO_ROW *most_overlapping_row( // find best row
+    TO_ROW_LIST *rows,        // list of rows
+    BLOBNBOX *blob            // blob to place
+);
+void find_underlined_blobs(    // get chop points
+    BLOBNBOX *u_line,          // underlined unit
+    QSPLINE *baseline,         // actual baseline
+    float xheight,             // height of line
+    float baseline_offset,     // amount to shrinke it
+    ICOORDELT_LIST *chop_cells // places to chop
+);
+void vertical_cunderline_projection( // project outlines
+    C_OUTLINE *outline,              // outline to project
+    QSPLINE *baseline,               // actual baseline
+    float xheight,                   // height of line
+    float baseline_offset,           // amount to shrinke it
+    STATS *lower_proj,               // below baseline
+    STATS *middle_proj,              // centre region
+    STATS *upper_proj                // top region
+);
+
+} // namespace tesseract
+
+#endif