--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zxing-cpp/wrappers/wasm/BarcodeWriter.cpp	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,94 @@
+/*
+* Copyright 2016 Nu-book Inc.
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#include "BarcodeFormat.h"
+#include "MultiFormatWriter.h"
+#include "BitMatrix.h"
+#include "CharacterSet.h"
+
+#include <string>
+#include <memory>
+#include <exception>
+#include <emscripten/bind.h>
+#include <emscripten/val.h>
+
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include <stb_image_write.h>
+
+class ImageData
+{
+public:
+	uint8_t* const buffer;
+	const int length;
+
+	ImageData(uint8_t* buf, int len) : buffer(buf), length(len) {}
+	~ImageData() { STBIW_FREE(buffer); }
+};
+
+class WriteResult
+{
+	std::shared_ptr<ImageData> _image;
+	std::string _error;
+
+public:
+	WriteResult(const std::shared_ptr<ImageData>& image) : _image(image) {}
+	WriteResult(std::string error) : _error(std::move(error)) {}
+
+	std::string error() const { return _error; }
+
+	emscripten::val image() const
+	{
+		if (_image != nullptr)
+			return emscripten::val(emscripten::typed_memory_view(_image->length, _image->buffer));
+		else
+			return emscripten::val::null();
+	}
+};
+
+WriteResult generateBarcode(std::wstring text, std::string format, std::string encoding, int margin, int width, int height, int eccLevel)
+{
+	using namespace ZXing;
+	try {
+		auto barcodeFormat = BarcodeFormatFromString(format);
+		if (barcodeFormat == BarcodeFormat::None)
+			return {"Unsupported format: " + format};
+
+		MultiFormatWriter writer(barcodeFormat);
+		if (margin >= 0)
+			writer.setMargin(margin);
+
+		CharacterSet charset = CharacterSetFromString(encoding);
+		if (charset != CharacterSet::Unknown)
+			writer.setEncoding(charset);
+
+		if (eccLevel >= 0 && eccLevel <= 8)
+			writer.setEccLevel(eccLevel);
+
+		auto buffer = ToMatrix<uint8_t>(writer.encode(text, width, height));
+
+		int len;
+		uint8_t* bytes = stbi_write_png_to_mem(buffer.data(), 0, buffer.width(), buffer.height(), 1, &len);
+		if (bytes == nullptr)
+			return {"Unknown error"};
+
+		return {std::make_shared<ImageData>(bytes, len)};
+	} catch (const std::exception& e) {
+		return {e.what()};
+	} catch (...) {
+		return {"Unknown error"};
+	}
+}
+
+EMSCRIPTEN_BINDINGS(BarcodeWriter)
+{
+	using namespace emscripten;
+
+	class_<WriteResult>("WriteResult")
+	    .property("image", &WriteResult::image)
+	    .property("error", &WriteResult::error)
+	    ;
+
+	function("generateBarcode", &generateBarcode);
+}