Add masked icon for macOS with dynamic wallpapers (flameshot-org#4257)

Author: artptr

data/graphics.qrc

@@ -4,6 +4,8 @@
         <file>img/app/flameshot.svg</file>
         <file>img/app/org.flameshot.Flameshot.png</file>
         <file>img/app/flameshot.png</file>
+        <file>img/app/flameshot.mask.png</file>
+        <file>img/app/flameshot.mask.svg</file>
         <file>img/app/flameshot.monochrome.png</file>
         <file>img/app/flameshot.monochrome.svg</file>
         <file>img/app/keyboard.svg</file>

data/img/app/flameshot.mask.png

@@ -5,6 +5,10 @@
 #include <QApplication>
 #include <QFontMetrics>
 
+#if defined(Q_OS_MACOS)
+#include <QOperatingSystemVersion>
+#endif
+
 int GlobalValues::buttonBaseSize()
 {
     return QFontMetrics(qApp->font()).lineSpacing() * 2.2;
@@ -33,3 +37,21 @@ QString GlobalValues::iconPathPNG()
     return { ":img/app/flameshot.png" };
 #endif
 }
+
+QString GlobalValues::trayIconPath()
+{
+#if USE_MONOCHROME_ICON
+#if defined(Q_OS_MACOS)
+    auto currentMacOsVersion = QOperatingSystemVersion::current();
+    if (currentMacOsVersion >= QOperatingSystemVersion::MacOSBigSur) {
+        return { ":img/app/flameshot.mask.png" };
+    } else {
+        return { ":img/app/flameshot.monochrome.png" };
+    }
+#else
+    return { ":img/app/flameshot.monochrome.png" };
+#endif
+#else
+    return { ":img/app/flameshot.png" };
+#endif
+}

data/img/app/flameshot.mask.svg

@@ -11,4 +11,5 @@ int buttonBaseSize();
 QString versionInfo();
 QString iconPath();
 QString iconPathPNG();
+QString trayIconPath();
 }

src/utils/globalvalues.cpp

@@ -33,7 +33,14 @@ TrayIcon::TrayIcon(QObject* parent)
     setContextMenu(m_menu);
 #endif
     QIcon icon =
-      QIcon::fromTheme("flameshot-tray", QIcon(GlobalValues::iconPathPNG()));
+      QIcon::fromTheme("flameshot-tray", QIcon(GlobalValues::trayIconPath()));
+
+#if defined(Q_OS_MACOS)
+    if (currentMacOsVersion >= QOperatingSystemVersion::MacOSBigSur) {
+        icon.setIsMask(true);
+    }
+#endif
+
     setIcon(icon);
 
 #if defined(Q_OS_MACOS)