From ca431371a23a2b9ad36c1d64e11ea41d5e4e5f04 Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Fri, 26 Nov 2010 15:31:22 -0500
Subject: [PATCH] XQuartz: Disable the Mac OS X screensaver when in full screen
 mode

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
---
 hw/xquartz/quartz.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/hw/xquartz/quartz.c b/hw/xquartz/quartz.c
index e21303ccd..26b2c1f38 100644
--- a/hw/xquartz/quartz.c
+++ b/hw/xquartz/quartz.c
@@ -62,6 +62,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <IOKit/pwr_mgt/IOPMLib.h>
+#include <pthread.h>
 
 #include <rootlessCommon.h>
 #include <Xplugin.h>
@@ -246,6 +247,40 @@ void QuartzUpdateScreens(void) {
     quartzProcs->UpdateScreen(pScreen);
 }
 
+static void pokeActivityCallback(CFRunLoopTimerRef timer, void *info) {
+    UpdateSystemActivity(OverallAct);
+}
+
+static void QuartzScreenSaver(int state) {
+    static CFRunLoopTimerRef pokeActivityTimer = NULL;
+    static CFRunLoopTimerContext pokeActivityContext = { 0, NULL, NULL, NULL, NULL };
+    static pthread_mutex_t pokeActivityMutex = PTHREAD_MUTEX_INITIALIZER;
+
+    pthread_mutex_lock(&pokeActivityMutex);
+    
+    if(state) {
+        if(pokeActivityTimer == NULL)
+            goto QuartzScreenSaverEnd;
+
+        CFRunLoopTimerInvalidate(pokeActivityTimer);
+        CFRelease(pokeActivityTimer);
+        pokeActivityTimer = NULL;
+    } else {
+        if(pokeActivityTimer != NULL)
+            goto QuartzScreenSaverEnd;
+        
+        pokeActivityTimer = CFRunLoopTimerCreate(NULL, CFAbsoluteTimeGetCurrent(), 30, 0, 0, pokeActivityCallback, &pokeActivityContext);
+        if(pokeActivityTimer == NULL) {
+            ErrorF("Unable to create pokeActivityTimer.\n");
+            goto QuartzScreenSaverEnd;
+        }
+
+        CFRunLoopAddTimer(CFRunLoopGetMain(), pokeActivityTimer, kCFRunLoopCommonModes);
+    }
+QuartzScreenSaverEnd:
+    pthread_mutex_unlock(&pokeActivityMutex);
+}
+
 void QuartzShowFullscreen(int state) {
     int i;
     
@@ -256,6 +291,8 @@ void QuartzShowFullscreen(int state) {
         return;
     }
     
+    QuartzScreenSaver(!state);
+    
     if(XQuartzFullscreenVisible == state)
         return;