This may be a quick and dirty fix to the problems we've been having with the update code. However this requires something from DisplayDriver. I'll write about this in a moment on app_server list.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12165 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/Desktop.cpp

@@ -262,6 +262,7 @@ void Desktop::AddWinBorder(WinBorder *winBorder)
 	if (fWinBorderList.HasItem(winBorder))
 	{
 		Unlock();
+		ActiveRootLayer()->Unlock();
 		debugger("AddWinBorder: WinBorder already in Desktop list\n");
 		return;
 	}
@@ -356,6 +357,7 @@ void Desktop::RemoveWinBorder(WinBorder *winBorder)
 	else
 	{
 		Unlock();
+		ActiveRootLayer()->Unlock();
 		debugger("RemoveWinBorder: WinBorder not found in Desktop list\n");
 		return;
 	}

src/servers/app/Layer.cpp

@@ -589,7 +589,12 @@ void Layer::RequestDraw(const BRegion &reg, Layer *startFrom)
 		{
 			// server drawings are immediate.
 			// No IPC is needed so this is done in place.
-			
+			if (fClassID == AS_WINBORDER_CLASS)
+			{
+				WinBorder	*wb = (WinBorder*)this;
+				wb->zUpdateReg.Include(&reg);
+			}
+
 			fUpdateReg = fVisible;
 			if (fFlags & B_FULL_UPDATE_ON_RESIZE
 				&& fFrameAction	== B_LAYER_ACTION_RESIZE)
@@ -625,16 +630,7 @@ void Layer::RequestDraw(const BRegion &reg, Layer *startFrom)
 			common.IntersectWith(&reg);
 			
 			if (common.CountRects() > 0)
-			{
-				// lock/unlock if we are a winborder
-				if (lay->fClassID == AS_WINBORDER_CLASS)
-					lay->Window()->Lock();
-				
 				lay->RequestDraw(reg, NULL);
-				
-				if (lay->fClassID == AS_WINBORDER_CLASS)
-					lay->Window()->Unlock();
-			}
 		}
 	}
 }
@@ -659,15 +655,26 @@ void Layer::UpdateStart()
 {
 	// During updates we only want to draw what's in the update region
 	fInUpdate = true;
+	if (fClassID == AS_WINBORDER_CLASS)
+	{
+		WinBorder	*wb = (WinBorder*)this;
+		wb->yUpdateReg = wb->zUpdateReg;
+		wb->zUpdateReg.MakeEmpty();
+	}
 	fClipReg = &fUpdateReg;
 }
 
 void Layer::UpdateEnd()
 {
 	// The usual case. Drawing is permitted in the whole visible area.
-	fInUpdate = false;
-	fClipReg = &fVisible;
 	fUpdateReg.MakeEmpty();
+	if (fClassID == AS_WINBORDER_CLASS)
+	{
+		WinBorder	*wb = (WinBorder*)this;
+		wb->yUpdateReg.MakeEmpty();
+	}
+
+	fInUpdate = false;
 }
 
 /*!

src/servers/app/RootLayer.h

@@ -120,7 +120,8 @@ public:
 			void				GoRedraw(const Layer *layer, const BRegion &region);
 
 			// Debug methods
-			void			PrintToStream(void);
+			void				PrintToStream(void);
+			thread_id			LockingThread() { return fAllRegionsLock.LockingThread(); }
 	
 			BRegion				fRedrawReg;
 			BList				fCopyRegList;

src/servers/app/ServerWindow.cpp

@@ -1408,7 +1408,9 @@ void ServerWindow::DispatchMessage(int32 code, LinkMsgReader &link)
 		case AS_BEGIN_UPDATE:
 		{
 			DTRACE(("ServerWindowo %s: AS_BEGIN_UPDATE\n",fTitle.String()));
+			fWinBorder->GetRootLayer()->Lock();
 			cl->UpdateStart();
+			fWinBorder->GetRootLayer()->Unlock();
 			break;
 		}
 		case AS_END_UPDATE:
@@ -1636,10 +1638,23 @@ void ServerWindow::DispatchMessage(int32 code, LinkMsgReader &link)
 			STRACE(("ServerWindow %s: Message Zoom unimplemented\n",fTitle.String()));
 			break;
 		}
-		
+		default:
+		{
+			DispatchGraphicsMessage(code, link);
+		}
+	}
+}
 		// -------------------- Graphics messages ----------------------------------
-		
+void ServerWindow::DispatchGraphicsMessage(int32 code, LinkMsgReader &link)
-		
+{
+	fWinBorder->GetRootLayer()->Lock();
+	BRegion		rreg(cl->fVisible);
+	rreg.Include(&fWinBorder->zUpdateReg);
+
+	desktop->GetDisplayDriver()->ConstrainClippingRegion(&rreg);
+
+	switch (code)
+	{
 		case AS_LAYER_SET_HIGH_COLOR:
 		{
 			DTRACE(("ServerWindow %s: Message AS_LAYER_SET_HIGH_COLOR: Layer: %s\n",fTitle.String(), cl->fName->String()));
@@ -2222,6 +2237,9 @@ void ServerWindow::DispatchMessage(int32 code, LinkMsgReader &link)
 			break;
 		}
 	}
+
+	desktop->GetDisplayDriver()->ConstrainClippingRegion(NULL);
+	fWinBorder->GetRootLayer()->Unlock();
 }
 //------------------------------------------------------------------------------
 /*!

src/servers/app/ServerWindow.h

@@ -131,6 +131,7 @@ private:
 
 	// message handle methods.
 	void DispatchMessage(int32 code, LinkMsgReader &link);
+	void DispatchGraphicsMessage(int32 code, LinkMsgReader &link);
 	static int32 MonitorWin(void *data);
 
 

src/servers/app/WinBorder.h

@@ -112,6 +112,9 @@ protected:
 	Decorator *fDecorator;
 	Layer *fTopLayer;
 
+	BRegion	 zUpdateReg;
+	BRegion	 yUpdateReg;
+
 	int32 fMouseButtons;
 	int32 fKeyModifiers;
 	BPoint fLastMousePosition;