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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ *
+ * File autogenerated with Xcode. Adapted for cocos2d needs.
+ */
+
+// Only compile this code on iOS. These files should NOT be included on your Mac project.
+// But in case they are included, it won't be compiled.
+#import <Availability.h>
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+
+#import "ES1Renderer.h"
+#import "../../Support/OpenGL_Internal.h"
+#import "../../ccMacros.h"
+
+
+@interface ES1Renderer (private)
+
+- (GLenum) convertPixelFormat:(int) pixelFormat;
+
+@end
+
+
+@implementation ES1Renderer
+
+@synthesize context=context_;
+
+- (id) initWithDepthFormat:(unsigned int)depthFormat withPixelFormat:(unsigned int)pixelFormat withSharegroup:(EAGLSharegroup*)sharegroup withMultiSampling:(BOOL) multiSampling withNumberOfSamples:(unsigned int) requestedSamples
+{
+    if ((self = [super init]))
+    {
+                if ( sharegroup == nil )
+                {
+                        context_ = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];
+                }
+                else
+                {
+                        context_ = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1 sharegroup:sharegroup];
+                }
+
+        if (!context_ || ![EAGLContext setCurrentContext:context_])
+        {
+            [self release];
+            return nil;
+        }
+
+        // Create default framebuffer object. The backing will be allocated for the current layer in -resizeFromLayer
+        glGenFramebuffersOES(1, &defaultFramebuffer_);
+                NSAssert( defaultFramebuffer_, @"Can't create default frame buffer");
+        glGenRenderbuffersOES(1, &colorRenderbuffer_);
+                NSAssert( colorRenderbuffer_, @"Can't create default render buffer");
+
+        glBindFramebufferOES(GL_FRAMEBUFFER_OES, defaultFramebuffer_);
+        glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer_);
+        glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, colorRenderbuffer_);
+
+                depthFormat_ = depthFormat;
+                
+                if( depthFormat_ ) {
+//                      glGenRenderbuffersOES(1, &depthBuffer_);
+//                      glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthBuffer_);
+//                      glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depthFormat_, 100, 100);
+//                      glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthBuffer_);
+
+                        // default buffer
+//                      glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer_);
+                }
+                
+                pixelFormat_ = pixelFormat;
+                multiSampling_ = multiSampling; 
+                if (multiSampling_)
+                {
+                        GLint maxSamplesAllowed;
+                        glGetIntegerv(GL_MAX_SAMPLES_APPLE, &maxSamplesAllowed);
+                        samplesToUse_ = MIN(maxSamplesAllowed,requestedSamples);
+                        
+                        /* Create the MSAA framebuffer (offscreen) */
+                        glGenFramebuffersOES(1, &msaaFramebuffer_);
+                        glBindFramebufferOES(GL_FRAMEBUFFER_OES, msaaFramebuffer_);
+                        
+                }
+
+                CHECK_GL_ERROR();
+    }
+
+    return self;
+}
+
+- (BOOL)resizeFromLayer:(CAEAGLLayer *)layer
+{       
+    // Allocate color buffer backing based on the current layer size
+
+    glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer_);
+
+        if (![context_ renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:layer])
+        {
+                CCLOG(@"failed to call context");       
+        }
+
+    glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth_);
+    glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight_);
+
+        CCLOG(@"cocos2d: surface size: %dx%d", (int)backingWidth_, (int)backingHeight_);
+
+        if (multiSampling_)
+        {
+                
+                if ( msaaColorbuffer_) {
+                        glDeleteRenderbuffersOES(1, &msaaColorbuffer_);
+                        msaaColorbuffer_ = 0;
+                }
+
+                /* Create the offscreen MSAA color buffer.
+                 After rendering, the contents of this will be blitted into ColorRenderbuffer */
+                
+                //msaaFrameBuffer needs to be binded
+                glBindFramebufferOES(GL_FRAMEBUFFER_OES, msaaFramebuffer_);
+                glGenRenderbuffersOES(1, &msaaColorbuffer_);
+                glBindRenderbufferOES(GL_RENDERBUFFER_OES, msaaColorbuffer_);
+                glRenderbufferStorageMultisampleAPPLE(GL_RENDERBUFFER_OES, samplesToUse_,pixelFormat_ , backingWidth_, backingHeight_);
+                glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, msaaColorbuffer_);
+
+                if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES)
+                {
+                        CCLOG(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES));
+                        return NO;
+                }
+        }
+        
+        if (depthFormat_) 
+        {
+                if( ! depthBuffer_ )
+                        glGenRenderbuffersOES(1, &depthBuffer_);
+                
+                glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthBuffer_);
+                if( multiSampling_ )
+                        glRenderbufferStorageMultisampleAPPLE(GL_RENDERBUFFER_OES, samplesToUse_, depthFormat_,backingWidth_, backingHeight_);
+                else
+                        glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depthFormat_, backingWidth_, backingHeight_);
+                glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthBuffer_);
+                
+                // bind color buffer
+                glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer_);
+        }
+        
+        glBindFramebufferOES(GL_FRAMEBUFFER_OES, defaultFramebuffer_);
+        
+        if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES)
+        {
+                CCLOG(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES));
+                return NO;
+        }
+
+        CHECK_GL_ERROR();
+
+    return YES;
+}
+
+-(CGSize) backingSize
+{
+        return CGSizeMake( backingWidth_, backingHeight_);
+}
+
+- (NSString*) description
+{
+        return [NSString stringWithFormat:@"<%@ = %08X | size = %ix%i>", [self class], self, backingWidth_, backingHeight_];
+}
+
+
+- (void)dealloc
+{
+        CCLOGINFO(@"cocos2d: deallocing %@", self);
+
+    // Tear down GL
+    if(defaultFramebuffer_)
+    {
+        glDeleteFramebuffersOES(1, &defaultFramebuffer_);
+        defaultFramebuffer_ = 0;
+    }
+
+    if(colorRenderbuffer_)
+    {
+        glDeleteRenderbuffersOES(1, &colorRenderbuffer_);
+        colorRenderbuffer_ = 0;
+    }
+
+        if( depthBuffer_ )
+        {
+                glDeleteRenderbuffersOES(1, &depthBuffer_);
+                depthBuffer_ = 0;
+        }
+
+        if ( msaaColorbuffer_)
+        {
+                glDeleteRenderbuffersOES(1, &msaaColorbuffer_);
+                msaaColorbuffer_ = 0;
+        }
+        
+        if ( msaaFramebuffer_)
+        {
+                glDeleteRenderbuffersOES(1, &msaaFramebuffer_);
+                msaaFramebuffer_ = 0;
+        }
+        
+    // Tear down context
+    if ([EAGLContext currentContext] == context_)
+        [EAGLContext setCurrentContext:nil];
+
+    [context_ release];
+    context_ = nil;
+
+    [super dealloc];
+}
+
+- (unsigned int) colorRenderBuffer
+{
+        return colorRenderbuffer_;
+}
+
+- (unsigned int) defaultFrameBuffer
+{
+        return defaultFramebuffer_;
+}
+
+- (unsigned int) msaaFrameBuffer
+{
+        return msaaFramebuffer_;        
+}
+
+- (unsigned int) msaaColorBuffer
+{
+        return msaaColorbuffer_;        
+}
+
+@end
+
+#endif // __IPHONE_OS_VERSION_MAX_ALLOWED