From c4807c5b607eb4dda4a2071c959cffd747bb9cf3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Tue, 27 Jan 2015 14:58:49 +0100
Subject: [PATCH] Only query once for XFree86-VidModeExtension

currentRefreshRate is called after each randr event and we don't
need to query the extension each time.

REVIEW: 122272
---
 options.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/options.cpp b/options.cpp
index caba701259..c9623fbadc 100644
--- a/options.cpp
+++ b/options.cpp
@@ -55,7 +55,8 @@ int currentRefreshRate()
     else if (GLPlatform::instance()->driver() == Driver_NVidia) {
 #ifndef KWIN_NO_XF86VM
         int major, event, error;
-        if (XQueryExtension(display(), "XFree86-VidModeExtension", &major, &event, &error)) {
+        static const bool s_hasVidMode = XQueryExtension(display(), "XFree86-VidModeExtension", &major, &event, &error);
+        if (s_hasVidMode) {
             XF86VidModeModeLine modeline;
             int dotclock, vtotal;
             if (XF86VidModeGetModeLine(display(), 0, &dotclock, &modeline)) {