--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zxing-cpp/core/src/BinaryBitmap.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,66 @@
+/*
+* Copyright 2016 Nu-book Inc.
+* Copyright 2016 ZXing authors
+* Copyright 2021 Axel Waggershauser
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "ImageView.h"
+
+#include <cstdint>
+#include <memory>
+#include <vector>
+
+namespace ZXing {
+
+class BitMatrix;
+
+using PatternRow = std::vector<uint16_t>;
+
+/**
+* This class is the core bitmap class used by ZXing to represent 1 bit data. Reader objects
+* accept a BinaryBitmap and attempt to decode it.
+*/
+class BinaryBitmap
+{
+	struct Cache;
+	std::unique_ptr<Cache> _cache;
+	bool _inverted = false;
+	bool _closed = false;
+
+protected:
+	const ImageView _buffer;
+
+	/**
+	* Converts a 2D array of luminance data to 1 bit (true means black).
+	*
+	* @return The 2D array of bits for the image, nullptr on error.
+	*/
+	virtual std::shared_ptr<const BitMatrix> getBlackMatrix() const = 0;
+
+	BitMatrix binarize(const uint8_t threshold) const;
+
+public:
+	BinaryBitmap(const ImageView& buffer);
+	virtual ~BinaryBitmap();
+
+	int width() const { return _buffer.width(); }
+	int height() const { return _buffer.height(); }
+
+	/**
+	* Converts one row of luminance data to a vector of ints denoting the widths of the bars and spaces.
+	*/
+	virtual bool getPatternRow(int row, int rotation, PatternRow& res) const = 0;
+
+	const BitMatrix* getBitMatrix() const;
+
+	void invert();
+	bool inverted() const { return _inverted; }
+
+	void close();
+	bool closed() const { return _closed; }
+};
+
+} // ZXing