From 55ef01d93f8257b5927660290fc1ead0b2b74ec9 Mon Sep 17 00:00:00 2001
From: Andreas Hartmetz <ahartmetz@gmail.com>
Date: Thu, 18 Mar 2010 02:41:14 +0100
Subject: [PATCH] Add environment variable switch for graphicssystem so distros and
 non-developers can more easily pick a different default.

---
 src/gui/kernel/qapplication.cpp |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/src/gui/kernel/qapplication.cpp b/src/gui/kernel/qapplication.cpp
index 49713cf..af83047 100644
--- a/src/gui/kernel/qapplication.cpp
+++ b/src/gui/kernel/qapplication.cpp
@@ -763,6 +763,10 @@ void QApplicationPrivate::construct(
 
     qt_is_gui_used = (qt_appType != QApplication::Tty);
     process_cmdline();
+    // the environment variable has the lowest precedence of runtime graphicssystem switches
+    if (graphics_system_name.isEmpty()) {
+        graphics_system_name = QString::fromLocal8Bit(qgetenv("QT_GRAPHICSSYSTEM"));
+    }
     // Must be called before initialize()
     qt_init(this, qt_appType
 #ifdef Q_WS_X11
-- 
1.6.1