From 61658e60ad8f392a185a7bc464b0bb0a7c5d4716 Mon Sep 17 00:00:00 2001
From: "Bruce B. Lacey" <bruce@blacey.com>
Date: Thu, 2 Mar 2017 10:16:05 -0800
Subject: [PATCH] Qt5: Enabled HiDPI scaling and Use HiDPI Qt Pixmaps

  * Enable HiDPI scaling on displays that support it
    on Qt 5.6 and later
  * Enable HiDPI Pixmaps on Qt 5.1 and later
---
 src/Gui/Application.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Gui/Application.cpp b/src/Gui/Application.cpp
index 080b7d4e8..90877c701 100644
--- a/src/Gui/Application.cpp
+++ b/src/Gui/Application.cpp
@@ -1518,6 +1518,14 @@ void Application::runApplication(void)
         return;
     }
 
+#if QT_VERSION >= 0x050600
+    //Enable automatic scaling based on pixel density fo display (added in Qt 5.6)
+    mainApp.setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+#if QT_VERSION >= 0x050100
+    //Enable support for highres images (added in Qt 5.1, but off by default)
+    mainApp.setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
     // set application icon and window title
     it = cfg.find("Application");
     if (it != cfg.end()) {