zxing-cpp: strip to core library only (remove tests/wrappers/examples/docs); .gitignore: fix /core to allow zxing-cpp/core/ dir

tools/chatgui/zxing-cpp/core/src/WriteBarcode.h

@@ -0,0 +1,72 @@
+/*
+* Copyright 2024 Axel Waggershauser
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "Barcode.h"
+#include "ImageView.h"
+
+#include <memory>
+
+namespace ZXing {
+
+/**
+ * @brief Configuration options for barcode writing/generation.
+ *
+ * WriterOptions provides a fluent interface for setting various parameters
+ * that control how barcodes are generated.
+ *
+ * This class supports method chaining for convenient option configuration:
+ * ```cpp
+ * auto opts = WriterOptions().scale(5).addHRT(true);
+ * ```
+ */
+class WriterOptions
+{
+	struct Data;
+
+	std::unique_ptr<Data> d;
+
+public:
+	WriterOptions();
+	~WriterOptions();
+	WriterOptions(WriterOptions&&) noexcept;
+	WriterOptions& operator=(WriterOptions&&) noexcept;
+
+#define ZX_PROPERTY(TYPE, NAME) \
+	TYPE NAME() const noexcept; \
+	WriterOptions& NAME(TYPE v)&; \
+	WriterOptions&& NAME(TYPE v)&&;
+
+	/// scale factor for rendering, ie the module size (default: 1). Passing a negative value will choose the scale
+	/// automatically to fit the size of the barcode to abs(scale) as close as possible.
+	ZX_PROPERTY(int, scale)
+
+	/// rotate the barcode by given degrees (0, 90, 180, 270)
+	ZX_PROPERTY(int, rotate)
+
+	/// invert the colors of the barcode
+	ZX_PROPERTY(bool, invert)
+
+	/// add human readable text (HRI) to the barcode
+	ZX_PROPERTY(bool, addHRT)
+
+	/// add quiet zones around the barcode (default: true)
+	ZX_PROPERTY(bool, addQuietZones)
+
+#undef ZX_PROPERTY
+};
+
+
+/// Write barcode symbol to SVG
+std::string WriteBarcodeToSVG(const Barcode& barcode, const WriterOptions& options = {});
+
+/// Write barcode symbol to a utf8 string using graphical characters (e.g. '▀')
+std::string WriteBarcodeToUtf8(const Barcode& barcode, const WriterOptions& options = {});
+
+/// Write barcode symbol to Image (Bitmap)
+Image WriteBarcodeToImage(const Barcode& barcode, const WriterOptions& options = {});
+
+} // ZXing