--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Classes/EAGLView.m	Fri Jul 29 18:18:15 2011 -0700
@@ -0,0 +1,153 @@
+//
+//  EAGLView.m
+//  MySampleProject
+//
+//  Created by Eric Wing on 7/29/11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import <QuartzCore/QuartzCore.h>
+
+#import "EAGLView.h"
+
+@interface EAGLView (PrivateMethods)
+- (void)createFramebuffer;
+- (void)deleteFramebuffer;
+@end
+
+@implementation EAGLView
+
+@dynamic context;
+
+// You must implement this method
++ (Class)layerClass
+{
+    return [CAEAGLLayer class];
+}
+
+//The EAGL view is stored in the nib file. When it's unarchived it's sent -initWithCoder:.
+- (id)initWithCoder:(NSCoder*)coder
+{
+    self = [super initWithCoder:coder];
+	if (self)
+    {
+        CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer;
+        
+        eaglLayer.opaque = TRUE;
+        eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
+                                        [NSNumber numberWithBool:FALSE], kEAGLDrawablePropertyRetainedBacking,
+                                        kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat,
+                                        nil];
+    }
+    
+    return self;
+}
+
+- (void)dealloc
+{
+    [self deleteFramebuffer];    
+    [context release];
+    
+    [super dealloc];
+}
+
+- (EAGLContext *)context
+{
+    return context;
+}
+
+- (void)setContext:(EAGLContext *)newContext
+{
+    if (context != newContext)
+    {
+        [self deleteFramebuffer];
+        
+        [context release];
+        context = [newContext retain];
+        
+        [EAGLContext setCurrentContext:nil];
+    }
+}
+
+- (void)createFramebuffer
+{
+    if (context && !defaultFramebuffer)
+    {
+        [EAGLContext setCurrentContext:context];
+        
+        // Create default framebuffer object.
+        glGenFramebuffers(1, &defaultFramebuffer);
+        glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
+        
+        // Create color render buffer and allocate backing store.
+        glGenRenderbuffers(1, &colorRenderbuffer);
+        glBindRenderbuffer(GL_RENDERBUFFER, colorRenderbuffer);
+        [context renderbufferStorage:GL_RENDERBUFFER fromDrawable:(CAEAGLLayer *)self.layer];
+        glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &framebufferWidth);
+        glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &framebufferHeight);
+        
+        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorRenderbuffer);
+        
+        if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+            NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
+    }
+}
+
+- (void)deleteFramebuffer
+{
+    if (context)
+    {
+        [EAGLContext setCurrentContext:context];
+        
+        if (defaultFramebuffer)
+        {
+            glDeleteFramebuffers(1, &defaultFramebuffer);
+            defaultFramebuffer = 0;
+        }
+        
+        if (colorRenderbuffer)
+        {
+            glDeleteRenderbuffers(1, &colorRenderbuffer);
+            colorRenderbuffer = 0;
+        }
+    }
+}
+
+- (void)setFramebuffer
+{
+    if (context)
+    {
+        [EAGLContext setCurrentContext:context];
+        
+        if (!defaultFramebuffer)
+            [self createFramebuffer];
+        
+        glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
+        
+        glViewport(0, 0, framebufferWidth, framebufferHeight);
+    }
+}
+
+- (BOOL)presentFramebuffer
+{
+    BOOL success = FALSE;
+    
+    if (context)
+    {
+        [EAGLContext setCurrentContext:context];
+        
+        glBindRenderbuffer(GL_RENDERBUFFER, colorRenderbuffer);
+        
+        success = [context presentRenderbuffer:GL_RENDERBUFFER];
+    }
+    
+    return success;
+}
+
+- (void)layoutSubviews
+{
+    // The framebuffer will be re-created at the beginning of the next setFramebuffer method call.
+    [self deleteFramebuffer];
+}
+
+@end