* BView::FillRegion() sends the BRegion data instead of decomposing

it and rebuilding it on the server side (that causes a huge speed
  up for regions containing many rects)
* There is a method in ServerLink that could have been used, but I
  actually needed to add the direct BRegion support to LinkReceiver
* added LinkReceiver as a friend to BRegion class
* ServerApp and ServerWindow keep the CursorManager locked after they
  have retrieved a cursor until they have called Acquire() on the
  cursor. (Axel: what good is using atomic* stuff in Acquire() and
  Release() if we have to protect this by a lock anyways?)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16957 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/Region.h

@@ -17,10 +17,10 @@
 
 namespace BPrivate {
 	class ServerLink;
+	class LinkReceiver;
 };
 
-
-/* Integer rect used to define a cliping rectangle. All bounds are included */
+/* Integer rect used to define a clipping rectangle. All bounds are inclusive. */
 /* Moved from DirectWindow.h */
 typedef struct {
 	int32	left;
@@ -71,6 +71,7 @@ private:
 	friend class BDirectWindow;
 	friend class Support;
 	friend class BPrivate::ServerLink;
+	friend class BPrivate::LinkReceiver;
 
 		void	_AddRect(clipping_rect r);
 		void	set_size(long new_size);

headers/private/app/LinkReceiver.h

@@ -14,6 +14,7 @@
 #include <OS.h>
 
 class BString;
+class BRegion;
 
 
 namespace BPrivate {
@@ -26,15 +27,16 @@ class LinkReceiver {
 		void SetPort(port_id port);
 		port_id	Port(void) { return fReceivePort; }
 
-		status_t GetNextMessage(int32 &code, bigtime_t timeout = B_INFINITE_TIMEOUT);
+		status_t GetNextMessage(int32& code, bigtime_t timeout = B_INFINITE_TIMEOUT);
 		bool HasMessages() const;
 		bool NeedsReply() const;
 		int32 Code() const;
 
-		virtual status_t Read(void *data, ssize_t size);
+		virtual status_t Read(void* data, ssize_t size);
 		status_t ReadString(char** _string, size_t* _length = NULL);
 		status_t ReadString(BString& string, size_t* _length = NULL);
-		status_t ReadString(char *buffer, size_t bufferSize);
+		status_t ReadString(char* buffer, size_t bufferSize);
+		status_t ReadRegion(BRegion* region);
 
 		template <class Type> status_t Read(Type *data)
 			{ return Read(data, sizeof(Type)); }
@@ -46,7 +48,7 @@ class LinkReceiver {
 
 		port_id fReceivePort;
 
-		char	*fRecvBuffer;
+		char*	fRecvBuffer;
 		int32	fRecvPosition;	//current read position
 		int32	fRecvStart;	//start of current message
 		int32	fRecvBufferSize;