[WIP] Direct surface publishing using SyphonServerBase

Syphon.h

@@ -33,6 +33,7 @@
 #import <Syphon/SyphonOpenGLServer.h>
 #import <Syphon/SyphonOpenGLClient.h>
 #import <Syphon/SyphonOpenGLImage.h>
+#import <Syphon/SyphonServerBase.h>
 
 /*
  Deprecated headers

SyphonServerBase.h

@@ -28,6 +28,7 @@
 */
 
 #import <Foundation/Foundation.h>
+#import <IOSurface/IOSurface.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -64,6 +65,16 @@ extern NSString * const SyphonServerOptionIsPrivate;
  */
 @property (readonly) BOOL hasClients;
 
+
+/*!
+ Direclty publish an IOSurface you own. Note your surface MUST have kIOSurfaceIsGlobal property set to true, otherwise you will fail to publish and silently die
+ This API  circumvents normal Syphon Server operations, and does not opt in to IOSurface re-use, which makes this sub optimal in most, but not all situations.
+
+ This function will retain the surface until the next publishSurface: call, at which point the surface will be released, and the new incoming surface will be retained. 
+ */
+- (void)publishSurface:(IOSurfaceRef)surface;
+
+
 /*!
  Stops the server instance. Use of this method is optional and releasing all references to the server has the same effect.
  */

SyphonServerBase.m

@@ -266,6 +266,25 @@ - (IOSurfaceRef)newSurfaceForWidth:(size_t)width height:(size_t)height options:(
     return _surface;
 }
 
+- (void)publishSurface:(IOSurfaceRef)surface
+{
+    if (_surface)
+    {
+        CFRelease(_surface);
+    }
+
+    _surface = surface;
+
+    if (_surface)
+    {
+        // Return retained (caller releases)
+        CFRetain(_surface);
+        _pushPending = true;
+    }
+
+    [self publish];
+}
+
 - (void)publish
 {
     if (_pushPending)
@@ -276,6 +295,7 @@ - (void)publish
     }
     [(SyphonServerConnectionManager *)_connectionManager publishNewFrame];
 }
+
 #pragma mark Notification Handling for Server Presence
 /*
  Broadcast and discovery is done via NSDistributedNotificationCenter. Servers notify announce, change (currently only affects name) and retirement.