From ba0726e3dcba141cc3c7838865afa274edad813e Mon Sep 17 00:00:00 2001
From: bearishsun <ad6c8384cb4728bf648f276ad63bb60d5443e58a>
Date: Wed, 26 Dec 2018 09:30:50 +0100
Subject: [PATCH] Bugfix: Fix OpenGL not rendering in macOS Mojave

---
 .../bsfCore/Private/MacOS/BsMacOSWindow.h     |  3 +++
 .../bsfCore/Private/MacOS/BsMacOSWindow.mm    | 23 +++++++++++++++++++
 .../bsfGLRenderAPI/MacOS/BsMacOSContext.mm    |  3 ++-
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.h b/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.h
index 0a592810e..fdec2296f 100644
--- a/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.h
+++ b/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.h
@@ -151,6 +151,9 @@ namespace bs
 		 */
 		void _unregisterForDragAndDrop();
 
+		/** Lets the window know that the provided OpenGL context will be rendering to it. */
+		void _registerGLContext(void* context);
+
 		/** Returns internal private data for use by friends. */
 		Pimpl* _getPrivateData() const { return m; }
 
diff --git a/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.mm b/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.mm
index 777ab8e3c..b1632b0ed 100644
--- a/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.mm
+++ b/Source/Foundation/bsfCore/Private/MacOS/BsMacOSWindow.mm
@@ -1,6 +1,7 @@
 //************************************ bs::framework - Copyright 2018 Marko Pintera **************************************//
 //*********** Licensed under the MIT license. See LICENSE.md for full terms. This notice is not to be removed. ***********//
 #define BS_COCOA_INTERNALS 1
+#define GL_SILENCE_DEPRECATION 1
 #include "Private/MacOS/BsMacOSWindow.h"
 #include "Private/MacOS/BsMacOSPlatform.h"
 #include "Private/MacOS/BsMacOSDropTarget.h"
@@ -49,12 +50,14 @@ static bool keyCodeToInputCommand(uint32_t keyCode, bool shift, bs::InputCommand
 @interface BSView : NSView
 -(void)rightMouseDown:(NSEvent*) event;
 -(void)setBackgroundImage:(NSImage*)image;
+-(void)setGLContext:(NSOpenGLContext*)context;
 @end
 
 @implementation BSView
 {
 	NSTrackingArea* mTrackingArea;
 	NSImageView* mImageView;
+	NSOpenGLContext* mGLContext;
 }
 
 -(id)init
@@ -63,10 +66,24 @@ -(id)init
 
 	mTrackingArea = nil;
 	mImageView = nil;
+	mGLContext = nil;
 
 	return self;
 }
 
+-(void)setLayer:(CALayer*)layer
+{
+	[super setLayer:layer];
+
+	if(mGLContext)
+		[mGLContext update];
+}
+
+-(void)setGLContext:(NSOpenGLContext*)context
+{
+	mGLContext = context;
+}
+
 -(void)resetCursorRects
 {
 	[super resetCursorRects];
@@ -883,4 +900,10 @@ - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
 		if(m->numDropTargets == 0)
 			[m->window unregisterDraggedTypes];
 	}
+
+	void CocoaWindow::_registerGLContext(void* context)
+	{
+		NSOpenGLContext* glContext = (__bridge_transfer NSOpenGLContext* )context;
+		[m->view setGLContext:glContext];
+	}
 }
diff --git a/Source/Plugins/bsfGLRenderAPI/MacOS/BsMacOSContext.mm b/Source/Plugins/bsfGLRenderAPI/MacOS/BsMacOSContext.mm
index 611b60562..c366370d6 100644
--- a/Source/Plugins/bsfGLRenderAPI/MacOS/BsMacOSContext.mm
+++ b/Source/Plugins/bsfGLRenderAPI/MacOS/BsMacOSContext.mm
@@ -78,8 +78,9 @@
 			return;
 		}
 
-		NSWindow* nsWindow = window->_getPrivateData()->window;
+		window->_registerGLContext((__bridge_retained void*) m->context);
 
+		NSWindow* nsWindow = window->_getPrivateData()->window;
 		[m->context setView:[nsWindow contentView]];
 		[m->context makeCurrentContext];
 		[m->context update];