From b0f14c38c698f8578d90e406824800f8ba65c16c Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sat, 7 Dec 2002 06:48:49 +0000
Subject: [PATCH] From: Darrell Walisser Subject: Re: [SDL] OS X and power save

Here ya go. This works just fine. One might complain that it doesn't
generate the event until after wake as completed (there is about 5
seconds between the screen coming up and the expose event), but I think
that's OK.
---
 src/video/quartz/SDL_QuartzEvents.m | 40 +++++++++++++++++++++++++++++
 src/video/quartz/SDL_QuartzVideo.h  |  4 ++-
 src/video/quartz/SDL_QuartzVideo.m  |  3 +++
 3 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/video/quartz/SDL_QuartzEvents.m b/src/video/quartz/SDL_QuartzEvents.m
index b34882ddd..2f26b6dcb 100644
--- a/src/video/quartz/SDL_QuartzEvents.m
+++ b/src/video/quartz/SDL_QuartzEvents.m
@@ -20,6 +20,8 @@
     slouken@libsdl.org
 */
 #include <stdlib.h>	// For getenv()
+#include <IOKit/IOMessage.h> // For wake from sleep detection
+#include <IOKit/pwr_mgt/IOPMLib.h> // For wake from sleep detection
 #include "SDL_QuartzKeys.h"
 
 static void     QZ_InitOSKeymap (_THIS) {
@@ -304,6 +306,44 @@ static void QZ_DoDeactivate (_THIS) {
     SDL_PrivateAppActive (0, SDL_APPINPUTFOCUS);
 }
 
+void QZ_SleepNotificationHandler (void * refcon,
+                                  io_service_t service,
+                                  natural_t messageType,
+                                  void * messageArgument )
+{
+     SDL_VideoDevice *this = (SDL_VideoDevice*)refcon;
+     
+     switch(messageType)
+     {
+         case kIOMessageSystemWillSleep:
+             IOAllowPowerChange(powerConnection, (long) messageArgument);
+             break;
+         case kIOMessageCanSystemSleep:
+             IOAllowPowerChange(powerConnection, (long) messageArgument);
+             break;
+         case kIOMessageSystemHasPoweredOn:
+			/* awake */
+            SDL_PrivateExpose();
+            break;
+     }
+}
+
+static void QZ_RegisterForSleepNotifications (_THIS)
+{
+     CFRunLoopSourceRef rls;
+     IONotificationPortRef thePortRef;
+     io_object_t notifier;
+
+     powerConnection = IORegisterForSystemPower (this, &thePortRef, QZ_SleepNotificationHandler, &notifier);
+
+     if (powerConnection == 0)
+         NSLog(@"SDL: QZ_SleepNotificationHandler() IORegisterForSystemPower failed.");
+
+     rls = IONotificationPortGetRunLoopSource (thePortRef);
+     CFRunLoopAddSource (CFRunLoopGetCurrent(), rls, kCFRunLoopDefaultMode);
+     CFRelease (rls);
+}
+
 static void QZ_PumpEvents (_THIS)
 {
     int firstMouseEvent;
diff --git a/src/video/quartz/SDL_QuartzVideo.h b/src/video/quartz/SDL_QuartzVideo.h
index 6047d43f7..f9af234a2 100644
--- a/src/video/quartz/SDL_QuartzVideo.h
+++ b/src/video/quartz/SDL_QuartzVideo.h
@@ -131,7 +131,8 @@ typedef struct SDL_PrivateVideoData {
     SDLKey             keymap[256];        /* Mac OS X to SDL key mapping */
     Uint32             current_mods;       /* current keyboard modifiers, to track modifier state */
     Uint32             last_virtual_button;/* last virtual mouse button pressed */
-    
+    io_connect_t       powerConnection;    /* used with IOKit to detect wake from sleep */
+
     ImageDescriptionHandle yuv_idh;
     MatrixRecordPtr        yuv_matrix;
     DecompressorComponent  yuv_codec;
@@ -165,6 +166,7 @@ typedef struct SDL_PrivateVideoData {
 #define keymap (this->hidden->keymap)
 #define current_mods (this->hidden->current_mods)
 #define last_virtual_button (this->hidden->last_virtual_button)
+#define powerConnection (this->hidden->powerConnection)
 
 #define yuv_idh (this->hidden->yuv_idh)
 #define yuv_matrix (this->hidden->yuv_matrix)
diff --git a/src/video/quartz/SDL_QuartzVideo.m b/src/video/quartz/SDL_QuartzVideo.m
index 96232c3e3..ab5fc9840 100644
--- a/src/video/quartz/SDL_QuartzVideo.m
+++ b/src/video/quartz/SDL_QuartzVideo.m
@@ -131,6 +131,9 @@ static int QZ_VideoInit (_THIS, SDL_PixelFormat *video_format) {
     current_grab_mode = SDL_GRAB_OFF;
     in_foreground     = YES;
     
+    /* register for sleep notifications so wake from sleep generates SDL_VIDEOEXPOSE */
+    QZ_RegisterForSleepNotifications (this);
+    
     return 0;
 }