--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/ccstruct/quadratc.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,65 @@
+/**********************************************************************
+ * File:        quadratc.h  (Formerly quadrtic.h)
+ * Description: Code for the QUAD_COEFFS class.
+ * Author:      Ray Smith
+ * Created:     Tue Oct 08 17:24:40 BST 1991
+ *
+ * (C) Copyright 1991, 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 QUADRATC_H
+#define QUADRATC_H
+
+#include "points.h"
+
+namespace tesseract {
+
+class QUAD_COEFFS {
+public:
+  QUAD_COEFFS() = default;
+  QUAD_COEFFS(    // constructor
+      double xsq, // coefficients
+      float x, float constant) {
+    a = xsq;
+    b = x;
+    c = constant;
+  }
+
+  float y(             // evaluate
+      float x) const { // at x
+    return static_cast<float>((a * x + b) * x + c);
+  }
+
+  void move(        // reposition word
+      ICOORD vec) { // by vector
+    /************************************************************
+  y - q = a (x - p)^2 + b (x - p) + c
+  y - q = ax^2 - 2apx + ap^2 + bx - bp + c
+    y = ax^2 + (b - 2ap)x + (c - bp + ap^2 + q)
+************************************************************/
+    int16_t p = vec.x();
+    int16_t q = vec.y();
+
+    c = static_cast<float>(c - b * p + a * p * p + q);
+    b = static_cast<float>(b - 2 * a * p);
+  }
+
+  double a; // x squared
+  float b;  // x
+  float c;  // constant
+private:
+};
+
+} // namespace tesseract
+
+#endif