chore: import upstream snapshot with attribution

zxing-cpp/include/ZXing/MultiFormatWriter.h

@@ -0,0 +1,62 @@
+/*
+* Copyright 2017 Huy Cuong Nguyen
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "BarcodeFormat.h"
+#include "CharacterSet.h"
+
+#include <string>
+
+namespace ZXing {
+
+class BitMatrix;
+
+/**
+* This class is here just for convenience as it offers single-point service
+* to generate barcodes for all supported formats. As a result, this class
+* offer very limited customization compared to what are available in each
+* individual encoder.
+*/
+class MultiFormatWriter
+{
+public:
+	explicit MultiFormatWriter(BarcodeFormat format) : _format(format) {}
+
+	/**
+	* Used for Aztec, PDF417, and QRCode only.
+	*/
+	MultiFormatWriter& setEncoding(CharacterSet encoding) {
+		_encoding = encoding;
+		return *this;
+	}
+
+	/**
+	* Used for Aztec, PDF417, and QRCode only, [0-8].
+	*/
+	MultiFormatWriter& setEccLevel(int level) {
+		_eccLevel = level;
+		return *this;
+	}
+
+	/**
+	* Used for all formats, sets the minimum number of quiet zone pixels.
+	*/
+	MultiFormatWriter& setMargin(int margin) {
+		_margin = margin;
+		return *this;
+	}
+
+	BitMatrix encode(const std::wstring& contents, int width, int height) const;
+	BitMatrix encode(const std::string& contents, int width, int height) const;
+
+private:
+	BarcodeFormat _format;
+	CharacterSet _encoding = CharacterSet::Unknown;
+	int _margin = -1;
+	int _eccLevel = -1;
+};
+
+} // ZXing