From c9fa963e71258c5adfb71cf1996cd1bcb33df0bb Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Sun, 26 Feb 2023 08:54:17 +0100
Subject: Start with copy of whiteboard

---
 qrcode.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 qrcode.cpp

(limited to 'qrcode.cpp')

diff --git a/qrcode.cpp b/qrcode.cpp
new file mode 100644
index 0000000..da747a5
--- /dev/null
+++ b/qrcode.cpp
@@ -0,0 +1,37 @@
+#include "qrcode.h"
+
+#include <fmt/format.h>
+
+#include <qrcodegen/QrCode.hpp>
+
+#include <Magick++.h>
+
+using namespace qrcodegen;
+using namespace Magick;
+
+void QRCode::init()
+{
+ Magick::InitializeMagick(NULL);
+}
+
+std::string QRCode::getQRCode(const std::string& data)
+{
+ QrCode qrc {QrCode::encodeText(data.c_str(), QrCode::Ecc::MEDIUM)};
+
+ int size {qrc.getSize()};
+
+ Image image(fmt::format("{0}x{0}", size).c_str(), "white");
+ image.type(GrayscaleType);
+
+ for (int x = 0; x < size; x++) {
+  for (int y = 0; y < size; y++) {
+   image.pixelColor(x, y, qrc.getModule(x, y) ? "black" : "white");
+  }
+ }
+
+ image.magick("PNG");
+
+ Blob blob;
+ image.write(&blob);
+ return std::string{(char*)blob.data(), blob.length()};
+}
-- 
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