Merge pull request #3253

initramfs (1):
      refactor(hidpi): enable HiDPI support if Qt supports it

qtox.pro

@@ -108,11 +108,6 @@ contains(DISABLE_FILTER_AUDIO, NO) {
      DEFINES += QTOX_FILTER_AUDIO
 }
 
-contains(HIGH_DPI, YES) {
-    QT_DEVICE_PIXEL_RATIO= auto
-    DEFINES += HIGH_DPI
-}
-
 contains(JENKINS,YES) {
     INCLUDEPATH += ./libs/include/
 } else {

src/main.cpp

@@ -117,6 +117,12 @@ void logMessageHandler(QtMsgType type, const QMessageLogContext& ctxt, const QSt
 
 int main(int argc, char *argv[])
 {
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+    QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
+
     qInstallMessageHandler(logMessageHandler);
 
     QApplication a(argc, argv);
@@ -129,10 +135,6 @@ int main(int argc, char *argv[])
     osx::migrateProfiles();
 #endif
 
-#ifdef HIGH_DPI
-    a.setAttribute(Qt::AA_UseHighDpiPixmaps, true);
-#endif
-
     qsrand(time(0));
     Settings::getInstance();
     Translator::translate();