--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zxing-cpp/core/src/GridSampler.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,58 @@
+/*
+* Copyright 2016 Nu-book Inc.
+* Copyright 2016 ZXing authors
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "DetectorResult.h"
+#include "PerspectiveTransform.h"
+
+namespace ZXing {
+
+/**
+* Samples an image for a rectangular matrix of bits of the given dimension. The sampling
+* transformation is determined by the coordinates of 4 points, in the original and transformed
+* image space.
+*
+* The following figure is showing the layout a 'pixel'. The point (0,0) is the upper left corner
+* of the first pixel. (1,1) is its lower right corner.
+*
+*   0    1   ...   w
+* 0 #----#-- ... --#
+*   |    |   ...   |
+*   |    |   ...   |
+* 1 #----#   ... --#
+*   |    |   ...   |
+*
+*   |    |   ...   |
+* h #----#-- ... --#
+*
+* @param image image to sample
+* @param width width of {@link BitMatrix} to sample from image
+* @param height height of {@link BitMatrix} to sample from image
+* @param mod2Pix transforming a module (grid) coordinate into an image (pixel) coordinate
+* @return {@link DetectorResult} representing a grid of points sampled from the image within a region
+*   defined by the "src" parameters. Result is empty if transformation is invalid (out of bound access).
+*/
+DetectorResult SampleGrid(const BitMatrix& image, int width, int height, const PerspectiveTransform& mod2Pix);
+
+template <typename PointT = PointF>
+Quadrilateral<PointT> Rectangle(int x0, int x1, int y0, int y1, typename PointT::value_t o = 0.5)
+{
+	return {PointT{x0 + o, y0 + o}, {x1 + o, y0 + o}, {x1 + o, y1 + o}, {x0 + o, y1 + o}};
+}
+
+class ROI
+{
+public:
+	int x0, x1, y0, y1;
+	PerspectiveTransform mod2Pix;
+};
+
+using ROIs = std::vector<ROI>;
+
+DetectorResult SampleGrid(const BitMatrix& image, int width, int height, const ROIs& rois);
+
+} // ZXing