/*

===== IMPORTANT =====

This is sample code demonstrating API, technology or techniques in development.
Although this sample code has been reviewed for technical accuracy, it is not
final. Apple is supplying this information to help you plan for the adoption of
the technologies and programming interfaces described herein. This information
is subject to change, and software implemented based on this sample code should
be tested with final operating system software and final documentation. Newer
versions of this sample code may be provided with future seeds of the API or
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documentation, view the New & Updated sidebars in subsequent documentation
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=====================

File: EAGLView.m
Abstract: Convenience class that wraps the CAEAGLLayer from CoreAnimation into a
UIView subclass.

Version: 1.3

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*/

#import <QuartzCore/QuartzCore.h>

#import "EAGLView.h"
#import "ES1Renderer.h"
#import "CCDirector.h"
#import "NSSet.h"
#import "CCTouch.h"

//CLASS IMPLEMENTATIONS:

static EAGLView *view;

@interface EAGLView (Private)
-(BOOL) setupSurface;
@end

@implementation EAGLView

@synthesize surfaceSize=size_;
@synthesize pixelFormat=pixelformat_, depthFormat=depthFormat_;
@synthesize context=context_;

+ (Class) layerClass
{
	return [CAEAGLLayer class];
}

+ (id) viewWithFrame:(CGRect)frame
{
	return [[[self alloc] initWithFrame:frame] autorelease];
}

+ (id) viewWithFrame:(CGRect)frame pixelFormat:(NSString*)format
{
	return [[[self alloc] initWithFrame:frame pixelFormat:format] autorelease];
}

+ (id) viewWithFrame:(CGRect)frame pixelFormat:(NSString*)format depthFormat:(GLuint)depth preserveBackbuffer:(BOOL)retained
{
	return [[[self alloc] initWithFrame:frame pixelFormat:format depthFormat:depth preserveBackbuffer:retained] autorelease];
}

+ (id) getGlobalView
{
	return view;
}

- (id) initWithFrame:(CGRect)frame
{
	return [self initWithFrame:frame pixelFormat:kEAGLColorFormatRGB565 depthFormat:0 preserveBackbuffer:NO];
}

- (id) initWithFrame:(CGRect)frame pixelFormat:(NSString*)format 
{
	return [self initWithFrame:frame pixelFormat:format depthFormat:0 preserveBackbuffer:NO];
}

- (id) initWithFrame:(CGRect)frame pixelFormat:(NSString*)format depthFormat:(GLuint)depth preserveBackbuffer:(BOOL)retained
{
	if((self = [super initWithFrame:frame]))
	{
		pixelformat_ = format;
		depthFormat_ = depth;
		size_ = frame.size;
		
		if( ! [self setupSurface] ) {
			[self release];
			return nil;
		}
	}

	view = self;
	return self;
}

-(id) initWithCoder:(NSCoder *)aDecoder
{
	if( (self = [super initWithCoder:aDecoder]) ) {
		
		CAEAGLLayer *eaglLayer = (CAEAGLLayer*)[self layer];
		
		pixelformat_ = kEAGLColorFormatRGB565;
		depthFormat_ = 0; // GL_DEPTH_COMPONENT24_OES;
		size_ = [eaglLayer bounds].size;

		if( ! [self setupSurface] ) {
			[self release];
			return nil;
		}
    }
	
    return self;
}

-(int) getWidth
{
	CGSize bound = [self bounds].size;
	return bound.width;
}

-(int) getHeight
{
	CGSize bound = [self bounds].size;
	return bound.height;
}

-(BOOL) setupSurface
{
	CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer;
	
	eaglLayer.opaque = YES;
	eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
									[NSNumber numberWithBool:FALSE], kEAGLDrawablePropertyRetainedBacking,
									pixelformat_, kEAGLDrawablePropertyColorFormat, nil];
	
		
	renderer_ = [[ES1Renderer alloc] initWithDepthFormat:depthFormat_];
	if (!renderer_)
		return NO;

	context_ = [renderer_ context];
	[context_ renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:eaglLayer];

	//discardFramebufferSupported_ = [[CCConfiguration sharedConfiguration] supportsDiscardFramebuffer];
	
	return YES;
}

- (void) dealloc
{
	[renderer_ release];
	[super dealloc];
}

- (void) layoutSubviews
{
    [renderer_ resizeFromLayer:(CAEAGLLayer*)self.layer];
    size_ = [renderer_ backingSize];
}

- (void) swapBuffers
{
	// IMPORTANT:
	// - preconditions
	//	-> context_ MUST be the OpenGL context
	//	-> renderBuffer_ must be the the RENDER BUFFER

#ifdef __IPHONE_4_0
	if( discardFramebufferSupported_ && depthFormat_ ) {
		GLenum attachments[] = { GL_DEPTH_ATTACHMENT_OES };
		glDiscardFramebufferEXT(GL_FRAMEBUFFER_OES, 1, attachments);
	}
#endif // __IPHONE_4_0
	
	//if(![context_ presentRenderbuffer:GL_RENDERBUFFER_OES])
		//CCLOG(@"cocos2d: Failed to swap renderbuffer in %s\n", __FUNCTION__);
	[context_ presentRenderbuffer:GL_RENDERBUFFER_OES];
#if COCOS2D_DEBUG
	CHECK_GL_ERROR();
#endif	
}

#pragma mark EAGLView - Point conversion

// Pass the touches to the superview
#pragma mark EAGLView - Touch Delegate

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
	cocos2d::NSSet set;
	for (UITouch *touch in touches) {
		cocos2d::CCTouch *pCocosTouch = new cocos2d::CCTouch();
		float x = [touch locationInView: [touch view]].x;
		float y = [touch locationInView: [touch view]].y;
		pCocosTouch->SetTouchInfo(0, x, y);
		
		set.addObject(pCocosTouch);
		pCocosTouch->release();
	}
	
	cocos2d::CCDirector::sharedDirector()->getOpenGLView()->touchesBegan(&set);
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
	cocos2d::NSSet set;
	for (UITouch *touch in touches) {
		cocos2d::CCTouch *pCocosTouch = new cocos2d::CCTouch();
		float x = [touch locationInView: [touch view]].x;
		float y = [touch locationInView: [touch view]].y;
		pCocosTouch->SetTouchInfo(0, x, y);
		
		set.addObject(pCocosTouch);
		pCocosTouch->release();
	}
	
	cocos2d::CCDirector::sharedDirector()->getOpenGLView()->touchesMoved(&set);
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
	cocos2d::NSSet set;
	for (UITouch *touch in touches) {
		cocos2d::CCTouch *pCocosTouch = new cocos2d::CCTouch();
		float x = [touch locationInView: [touch view]].x;
		float y = [touch locationInView: [touch view]].y;
		pCocosTouch->SetTouchInfo(0, x, y);
		
		set.addObject(pCocosTouch);
		pCocosTouch->release();
	}
	
	cocos2d::CCDirector::sharedDirector()->getOpenGLView()->touchesEnded(&set);
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
	cocos2d::NSSet set;
	for (UITouch *touch in touches) {
		cocos2d::CCTouch *pCocosTouch = new cocos2d::CCTouch();
		float x = [touch locationInView: [touch view]].x;
		float y = [touch locationInView: [touch view]].y;
		pCocosTouch->SetTouchInfo(0, x, y);
		
		set.addObject(pCocosTouch);
		pCocosTouch->release();
	}
	
	cocos2d::CCDirector::sharedDirector()->getOpenGLView()->touchesCancelled(&set);
}

@end