Fix launcher having black pixels left behind when windows are moved over it on linux

InteropPatcher/Program.cs

@@ -28,7 +28,7 @@ namespace InteropPatcher {
 	
 	public static class Patcher {
 
-		public static int Main( string[] args ) {
+		public static int Main(string[] args) {
 			try {
 				if( args.Length == 0 ) {
 					Console.WriteLine( "Expecting single argument specifying the file to patch" );

Launcher2/LauncherWindow.cs

@@ -26,7 +26,7 @@ namespace Launcher {
 		public Screen Screen;
 		
 		/// <summary> Whether the client drawing area needs to be redrawn/presented to the screen. </summary>
-		public bool Dirty;
+		public bool Dirty, pendingRedraw;
 				/// <summary> The specific area/region of the window that needs to be redrawn. </summary>
 		public Rectangle DirtyArea;
 		
@@ -58,9 +58,9 @@ namespace Launcher {
 		PlatformDrawer platformDrawer;
 		public void Init() {
 			Window.Resize += Resize;
-			Window.FocusedChanged += ForceRedraw;
+			Window.FocusedChanged += RedrawAll;
 			Window.WindowStateChanged += Resize;
-			Window.Redraw += ForceRedraw;
+			Window.Redraw += RedrawPending;
 			Keyboard.KeyDown += KeyDown;
 			
 			ClassicalSharp.Program.CleanupMainDirectory();
@@ -103,10 +103,16 @@ namespace Launcher {
 		void Resize(object sender, EventArgs e) {
 			UpdateClientSize();
 			platformDrawer.Resize();
-			ForceRedraw(sender, e);
+			RedrawAll(sender, e);
 		}
 		
-		void ForceRedraw(object sender, EventArgs e) {
+		void RedrawPending(object sender, EventArgs e) {
+			// in case we get multiple of these events
+			pendingRedraw = true;
+			Dirty = true;
+		}
+		
+		void RedrawAll(object sender, EventArgs e) {
 			if (Program.ShowingErrorDialog) return;
 			RedrawBackground();			
 			if (Screen != null) Screen.Resize();
@@ -217,6 +223,11 @@ namespace Launcher {
 		}
 		
 		void Display() {
+			if (pendingRedraw) {
+				RedrawAll(null, null);
+				pendingRedraw = false;
+			}
+			
 			Screen.OnDisplay();
 			Dirty = false;
 			
@@ -235,9 +246,9 @@ namespace Launcher {
 		
 		public void Dispose() {
 			Window.Resize -= Resize;
-			Window.FocusedChanged -= ForceRedraw;
+			Window.FocusedChanged -= RedrawAll;
 			Window.WindowStateChanged -= Resize;
-			Window.Redraw -= ForceRedraw;
+			Window.Redraw -= RedrawPending;
 			Keyboard.KeyDown -= KeyDown;
 			
 			List<FastBitmap> bitmaps = FetchFlagsTask.Bitmaps;

OpenTK/Platform/X11/Structs.cs

@@ -106,6 +106,20 @@ namespace OpenTK.Platform.X11 {
 		public IntPtr above;
 		public bool override_redirect;
 	}
+	
+	[StructLayout(LayoutKind.Sequential)]
+    public struct XExposeEvent {
+        public XEventName type;
+        public IntPtr serial;
+        public bool send_event;
+        public IntPtr display;
+        public IntPtr window;
+        public int x;
+        public int y;
+        public int width;
+        public int height;
+        public int count;
+    }
 
 	[StructLayout(LayoutKind.Sequential)]
 	public struct XPropertyEvent {
@@ -215,6 +229,8 @@ namespace OpenTK.Platform.X11 {
 		[FieldOffset(0)]
 		public XConfigureEvent ConfigureEvent;
 		[FieldOffset(0)]
+		public XExposeEvent ExposeEvent;
+		[FieldOffset(0)]
 		public XPropertyEvent PropertyEvent;
 		[FieldOffset(0)]
 		public XSelectionRequestEvent SelectionRequestEvent;

OpenTK/Platform/X11/X11Window.cs

@@ -44,7 +44,7 @@ namespace OpenTK.Platform.X11 {
 		IntPtr net_wm_state_minimized;
 		IntPtr net_wm_state_fullscreen;
 		IntPtr net_wm_state_maximized_horizontal;
-		IntPtr net_wm_state_maximized_vertical;	
+		IntPtr net_wm_state_maximized_vertical;
 		IntPtr net_wm_icon, net_frame_extents;
 
 		IntPtr xa_clipboard, xa_targets, xa_utf8_string, xa_data_sel;
@@ -272,6 +272,12 @@ namespace OpenTK.Platform.X11 {
 						RefreshWindowBounds(ref e);
 						break;
 						
+					case XEventName.Expose:
+						if (e.ExposeEvent.count == 0) {
+							RaiseRedraw();
+						}
+						break;
+						
 					case XEventName.KeyPress:
 						ToggleKey(ref e.KeyEvent, true);
 						int status = API.XLookupString(ref e.KeyEvent, ascii, ascii.Length, null, IntPtr.Zero);

src/Client/AsyncDownloader.c

@@ -112,7 +112,7 @@ static void AsyncDownloader_Add(String* url, bool priority, String* id, UInt8 ty
 		}
 	}
 	Platform_MutexUnlock(async_pendingMutex);
-	Platform_EventSet(async_eventHandle);
+	Platform_EventSignal(async_eventHandle);
 }
 
 void AsyncDownloader_GetSkin(STRING_PURE String* id, STRING_PURE String* skinName) {
@@ -355,7 +355,7 @@ static void AsyncDownloader_Reset(void) {
 		AsyncRequestList_Free(&async_pending);
 	}
 	Platform_MutexUnlock(async_pendingMutex);
-	Platform_EventSet(async_eventHandle);
+	Platform_EventSignal(async_eventHandle);
 }
 
 static void AsyncDownloader_Free(void) {

src/Client/Platform.h

@@ -77,7 +77,7 @@ void Platform_MutexUnlock(void* handle);
 
 void* Platform_EventCreate(void);
 void Platform_EventFree(void* handle);
-void Platform_EventSet(void* handle);
+void Platform_EventSignal(void* handle);
 void Platform_EventWait(void* handle);
 
 typedef Int64 Stopwatch;

src/Client/WinPlatform.c

@@ -341,7 +341,7 @@ void Platform_EventFree(void* handle) {
 	}
 }
 
-void Platform_EventSet(void* handle) {
+void Platform_EventSignal(void* handle) {
 	SetEvent((HANDLE)handle);
 }
 

src/Client/World.c

@@ -9,6 +9,7 @@
 #include "Entity.h"
 #include "ExtMath.h"
 #include "Physics.h"
+#include "Game.h"
 
 void World_Reset(void) {
 	Platform_MemFree(&World_Blocks);
@@ -19,7 +20,12 @@ void World_Reset(void) {
 
 	Random rnd;
 	Random_InitFromCurrentTime(&rnd);
+	/* add a bit of randomness for uuid */
 	Int32 i;
+	for (i = 0; i < Game_Username.length; i++) {
+		Random_Next(&rnd, Game_Username.buffer[i] + 3);
+	}
+
 	for (i = 0; i < 16; i++) {
 		World_Uuid[i] = Random_Next(&rnd, 256);
 	}

src/Client/X11Platform.c

@@ -35,8 +35,14 @@ static void Platform_UnicodeExpand(UInt8* dst, STRING_PURE String* src) {
 	*dst = NULL;
 }
 
-void Platform_Init(void) { }
-void Platform_Free(void) { }
+pthread_mutex_t event_mutex;
+void Platform_Init(void) {
+	pthread_mutex_init(&event_mutex, NULL);
+}
+
+void Platform_Free(void) {
+	pthread_mutex_destroy(&event_mutex);
+}
 
 void Platform_Exit(ReturnCode code) { exit(code); }
 STRING_PURE String Platform_GetCommandLineArgs(void);
@@ -264,10 +270,30 @@ void Platform_MutexUnlock(void* handle) {
 	ErrorHandler_CheckOrFail(result, "Unlocking mutex");
 }
 
-void* Platform_EventCreate(void);
-void Platform_EventFree(void* handle);
-void Platform_EventSet(void* handle);
-void Platform_EventWait(void* handle);
+pthread_cond_t condList[2]; Int32 condIndex;
+void* Platform_EventCreate(void) {
+	if (condIndex == Array_Elems(condList)) ErrorHandler_Fail("Cannot allocate event");
+	pthread_cond_t* ptr = &condList[condIndex];
+	int result = pthread_cond_init(ptr, NULL);
+
+	ErrorHandler_CheckOrFail(result, "Creating event");
+	condIndex++; return ptr;
+}
+
+void Platform_EventFree(void* handle) {
+	int result = pthread_cond_destroy((pthread_cond_t*)handle);
+	ErrorHandler_CheckOrFail(result, "Destroying event");
+}
+
+void Platform_EventSignal(void* handle) {
+	int result = pthread_cond_signal((pthread_cond_t*)handle);
+	ErrorHandler_CheckOrFail(result, "Signalling event");
+}
+
+void Platform_EventWait(void* handle) {
+	int result = pthread_cond_wait((pthread_cond_t*)handle, event_mutex);
+	ErrorHandler_CheckOrFail(result, "Waiting event");
+}
 
 void Stopwatch_Start(Stopwatch* timer);
 Int32 Stopwatch_ElapsedMicroseconds(Stopwatch* timer);

src/Client/X11Window.c

@@ -473,12 +473,18 @@ void Window_ProcessEvents(void) {
 			break;
 
 		case ConfigureNotify:
-			RefreshWindowBounds(&e);
+			Window_RefreshBounds(&e);
+			break;
+
+		case Expose:
+			if (e.xexpose.count == 0) {
+				Event_RaiseVoid(&WindowEvents_Redraw);
+			}
 			break;
 
 		case KeyPress:
 		{
-			ToggleKey(&e.xkey, true);
+			Window_ToggleKey(&e.xkey, true);
 			UInt8 data[16]; UInt8 convBuffer[16];
 			int status = XLookupString(&e.xkey, data, Array_Elems(data), NULL, NULL);
 
@@ -493,7 +499,7 @@ void Window_ProcessEvents(void) {
 		case KeyRelease:
 			/* TODO: raise KeyPress event. Use code from */
 			/* http://anonsvn.mono-project.com/viewvc/trunk/mcs/class/Managed.Windows.Forms/System.Windows.Forms/X11Keyboard.cs?view=markup */
-			ToggleKey(&e.xkey, false);
+			Window_ToggleKey(&e.xkey, false);
 			break;
 
 		case ButtonPress:
@@ -538,7 +544,7 @@ void Window_ProcessEvents(void) {
 
 		case PropertyNotify:
 			if (e.xproperty.atom == net_wm_state) {
-				RaiseWindowStateChanged();
+				Event_RaiseVoid(&WindowEvents_StateChanged);
 			}
 
 			//if (e.xproperty.atom == net_frame_extents) {
@@ -763,7 +769,7 @@ static XVisualInfo GLContext_SelectVisual(struct GraphicsMode* mode) {
 		visual = glXChooseVisual(win_display, win_screen, attribs);
 	}
 	if (visual == NULL) {
-		ErorrHandler_Fail("Requested GraphicsMode not available.");
+		ErrorHandler_Fail("Requested GraphicsMode not available.");
 	}
 
 	XVisualInfo info = *visual;