chore:add qr code support for login

Signed-off-by: Trial97 <alexandru.tripon97@gmail.com>

libraries/qt-qrcodegenerator/CMakeLists.txt

@@ -0,0 +1,32 @@
+cmake_minimum_required(VERSION 3.6)
+
+project(qrcode)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_CXX_STANDARD_REQUIRED true)
+set(CMAKE_C_STANDARD_REQUIRED true)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_C_STANDARD 11)
+
+
+if(QT_VERSION_MAJOR EQUAL 5)
+    find_package(Qt5 COMPONENTS Core Gui REQUIRED)
+elseif(Launcher_QT_VERSION_MAJOR EQUAL 6)
+    find_package(Qt6 COMPONENTS Core Gui Core5Compat REQUIRED)
+    list(APPEND systeminfo_LIBS Qt${QT_VERSION_MAJOR}::Core5Compat)
+endif()
+
+add_library(qrcode STATIC qr.h qr.cpp QR-Code-generator/cpp/qrcodegen.cpp QR-Code-generator/cpp/qrcodegen.hpp )
+
+target_link_libraries(qrcode Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Gui ${systeminfo_LIBS})
+
+
+# needed for statically linked qrcode in shared libs on x86_64
+set_target_properties(qrcode
+    PROPERTIES POSITION_INDEPENDENT_CODE TRUE
+)
+
+target_include_directories(qrcode PUBLIC ./ PRIVATE QR-Code-generator/cpp/)
+

libraries/qt-qrcodegenerator/qr.cpp

@@ -0,0 +1,29 @@
+
+#include "qr.h"
+#include "qrcodegen.hpp"
+
+void paintQR(QPainter& painter, const QSize sz, const QString& data, QColor fg)
+{
+    // NOTE: At this point you will use the API to get the encoding and format you want, instead of my hardcoded stuff:
+    qrcodegen::QrCode qr = qrcodegen::QrCode::encodeText(data.toUtf8().constData(), qrcodegen::QrCode::Ecc::LOW);
+    const int s = qr.getSize() > 0 ? qr.getSize() : 1;
+    const double w = sz.width();
+    const double h = sz.height();
+    const double aspect = w / h;
+    const double size = ((aspect > 1.0) ? h : w);
+    const double scale = size / (s + 2);
+    // NOTE: For performance reasons my implementation only draws the foreground parts in supplied color.
+    // It expects background to be prepared already (in white or whatever is preferred).
+    painter.setPen(Qt::NoPen);
+    painter.setBrush(fg);
+    for (int y = 0; y < s; y++) {
+        for (int x = 0; x < s; x++) {
+            const int color = qr.getModule(x, y);  // 0 for white, 1 for black
+            if (0 != color) {
+                const double rx1 = (x + 1) * scale, ry1 = (y + 1) * scale;
+                QRectF r(rx1, ry1, scale, scale);
+                painter.drawRects(&r, 1);
+            }
+        }
+    }
+}

libraries/qt-qrcodegenerator/qr.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <QColor>
+#include <QPainter>
+#include <QSize>
+
+// https://stackoverflow.com/questions/21400254/how-to-draw-a-qr-code-with-qt-in-native-c-c
+void paintQR(QPainter& painter, const QSize sz, const QString& data, QColor fg);