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diff --git a/indra/llwindow/llopenglview-objc.h b/indra/llwindow/llopenglview-objc.h
new file mode 100644
index 0000000000..41837b1eb4
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+++ b/indra/llwindow/llopenglview-objc.h
@@ -0,0 +1,110 @@
+/**
+ * @file llopenglview-objc.h
+ * @brief Class interfaces for most of the Mac facing window functionality.
+ *
+ * $LicenseInfo:firstyear=2000&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLOpenGLView_H
+#define LLOpenGLView_H
+
+#import <Cocoa/Cocoa.h>
+#import <IOKit/IOKitLib.h>
+#import <CoreFoundation/CFBase.h>
+#import <CoreFoundation/CFNumber.h>
+#include <string>
+
+@interface LLOpenGLView : NSOpenGLView <NSTextInputClient>
+{
+	std::string mLastDraggedUrl;
+	unsigned int mModifiers;
+	float mMousePos[2];
+	bool mHasMarkedText;
+	unsigned int mMarkedTextLength;
+    bool mMarkedTextAllowed;
+    bool mSimulatedRightClick;
+}
+- (id) initWithSamples:(NSUInteger)samples;
+- (id) initWithSamples:(NSUInteger)samples andVsync:(BOOL)vsync;
+- (id) initWithFrame:(NSRect)frame withSamples:(NSUInteger)samples andVsync:(BOOL)vsync;
+
+- (void)commitCurrentPreedit;
+
+// rebuildContext
+// Destroys and recreates a context with the view's internal format set via setPixelFormat;
+// Use this in event of needing to rebuild a context for whatever reason, without needing to assign a new pixel format.
+- (BOOL) rebuildContext;
+
+// rebuildContextWithFormat
+// Destroys and recreates a context with the specified pixel format.
+- (BOOL) rebuildContextWithFormat:(NSOpenGLPixelFormat *)format;
+
+// These are mostly just for C++ <-> Obj-C interop.  We can manipulate the CGLContext from C++ without reprecussions.
+- (CGLContextObj) getCGLContextObj;
+- (CGLPixelFormatObj*)getCGLPixelFormatObj;
+
+- (unsigned long) getVramSize;
+
+- (void) allowMarkedTextInput:(bool)allowed;
+
+@end
+
+@interface LLUserInputWindow : NSPanel
+
+@end
+
+@interface LLNonInlineTextView : NSTextView
+{
+	LLOpenGLView *glview;
+}
+
+- (void) setGLView:(LLOpenGLView*)view;
+
+@end
+
+@interface LLNSWindow : NSWindow
+
+- (NSPoint)convertToScreenFromLocalPoint:(NSPoint)point relativeToView:(NSView *)view;
+- (NSPoint)flipPoint:(NSPoint)aPoint;
+
+@end
+
+@interface NSScreen (PointConversion)
+
+/*
+ Returns the screen where the mouse resides
+ */
++ (NSScreen *)currentScreenForMouseLocation;
+
+/*
+ Allows you to convert a point from global coordinates to the current screen coordinates.
+ */
+- (NSPoint)convertPointToScreenCoordinates:(NSPoint)aPoint;
+
+/*
+ Allows to flip the point coordinates, so y is 0 at the top instead of the bottom. x remains the same
+ */
+- (NSPoint)flipPoint:(NSPoint)aPoint;
+
+@end
+
+#endif