Enable attribute Qt::AA_EnableHighDpiScaling for support HighDpi displays.

--HG--
branch : develop

src/app/tape/main.cpp

@@ -49,6 +49,10 @@ int main(int argc, char *argv[])
 
     qt_qhash_seed.store(0); // Lock producing random attribute order in XML
 
+#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
+#endif
+
     MApplication app(argc, argv);
     app.InitOptions();
 

src/app/valentina/main.cpp

@@ -53,6 +53,10 @@ int main(int argc, char *argv[])
 
     qt_qhash_seed.store(0); // Lock producing random attribute order in XML
 
+#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
+#endif
+
     VApplication app(argc, argv);
 
     app.InitOptions();