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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.
+ *
+ */
+
+// 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 <unistd.h>
+
+// cocos2d imports
+#import "CCDirectorIOS.h"
+#import "CCTouchDelegateProtocol.h"
+#import "CCTouchDispatcher.h"
+#import "../../CCScheduler.h"
+#import "../../CCActionManager.h"
+#import "../../CCTextureCache.h"
+#import "../../ccMacros.h"
+#import "../../CCScene.h"
+
+// support imports
+#import "glu.h"
+#import "../../Support/OpenGL_Internal.h"
+#import "../../Support/CGPointExtension.h"
+
+#import "CCLayer.h"
+
+#if CC_ENABLE_PROFILERS
+#import "../../Support/CCProfiling.h"
+#endif
+
+
+#pragma mark -
+#pragma mark Director - global variables (optimization)
+
+CGFloat __ccContentScaleFactor = 1;
+
+#pragma mark -
+#pragma mark Director iOS
+
+@interface CCDirector ()
+-(void) setNextScene;
+-(void) showFPS;
+-(void) calculateDeltaTime;
+@end
+
+@implementation CCDirector (iOSExtensionClassMethods)
+
++(Class) defaultDirector
+{
+        return [CCDirectorTimer class];
+}
+
++ (BOOL) setDirectorType:(ccDirectorType)type
+{
+        if( type == CCDirectorTypeDisplayLink ) {
+                NSString *reqSysVer = @"3.1";
+                NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
+                
+                if([currSysVer compare:reqSysVer options:NSNumericSearch] == NSOrderedAscending)
+                        return NO;
+        }
+        switch (type) {
+                case CCDirectorTypeNSTimer:
+                        [CCDirectorTimer sharedDirector];
+                        break;
+                case CCDirectorTypeDisplayLink:
+                        [CCDirectorDisplayLink sharedDirector];
+                        break;
+                case CCDirectorTypeMainLoop:
+                        [CCDirectorFast sharedDirector];
+                        break;
+                case CCDirectorTypeThreadMainLoop:
+                        [CCDirectorFastThreaded sharedDirector];
+                        break;
+                default:
+                        NSAssert(NO,@"Unknown director type");
+        }
+        
+        return YES;
+}
+
+@end
+
+
+
+#pragma mark -
+#pragma mark CCDirectorIOS
+
+@interface CCDirectorIOS ()
+-(void) updateContentScaleFactor;
+
+@end
+
+@implementation CCDirectorIOS
+
+- (id) init
+{  
+        if( (self=[super init]) ) {
+                                
+                // portrait mode default
+                deviceOrientation_ = CCDeviceOrientationPortrait;
+                
+                __ccContentScaleFactor = 1;
+                isContentScaleSupported_ = NO;
+                
+                // running thread is main thread on iOS
+                runningThread_ = [NSThread currentThread];
+        }
+        
+        return self;
+}
+
+- (void) dealloc
+{       
+        [super dealloc];
+}
+
+//
+// Draw the Scene
+//
+- (void) drawScene
+{    
+        /* calculate "global" dt */
+        [self calculateDeltaTime];
+        
+        /* tick before glClear: issue #533 */
+        if( ! isPaused_ ) {
+                [[CCScheduler sharedScheduler] tick: dt];       
+        }
+        
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        
+        /* to avoid flickr, nextScene MUST be here: after tick and before draw.
+         XXX: Which bug is this one. It seems that it can't be reproduced with v0.9 */
+        if( nextScene_ )
+                [self setNextScene];
+        
+        glPushMatrix();
+        
+        [self applyOrientation];
+        
+        // By default enable VertexArray, ColorArray, TextureCoordArray and Texture2D
+        CC_ENABLE_DEFAULT_GL_STATES();
+        
+        /* draw the scene */
+        [runningScene_ visit];
+        
+        /* draw the notification node */
+        [notificationNode_ visit];
+
+        if( displayFPS_ )
+                [self showFPS];
+        
+#if CC_ENABLE_PROFILERS
+        [self showProfilers];
+#endif
+        
+        CC_DISABLE_DEFAULT_GL_STATES();
+        
+        glPopMatrix();
+        
+        [openGLView_ swapBuffers];
+}
+
+-(void) setProjection:(ccDirectorProjection)projection
+{
+        CGSize size = winSizeInPixels_;
+        
+        switch (projection) {
+                case kCCDirectorProjection2D:
+                        glViewport(0, 0, size.width, size.height);
+                        glMatrixMode(GL_PROJECTION);
+                        glLoadIdentity();
+                        ccglOrtho(0, size.width, 0, size.height, -1024 * CC_CONTENT_SCALE_FACTOR(), 1024 * CC_CONTENT_SCALE_FACTOR());
+                        glMatrixMode(GL_MODELVIEW);
+                        glLoadIdentity();
+                        break;
+                        
+                case kCCDirectorProjection3D:
+                {
+                        float zeye = [self getZEye];
+
+                        glViewport(0, 0, size.width, size.height);
+                        glMatrixMode(GL_PROJECTION);
+                        glLoadIdentity();
+//                      gluPerspective(60, (GLfloat)size.width/size.height, zeye-size.height/2, zeye+size.height/2 );
+                        gluPerspective(60, (GLfloat)size.width/size.height, 0.5f, 1500);
+
+                        glMatrixMode(GL_MODELVIEW);     
+                        glLoadIdentity();
+                        gluLookAt( size.width/2, size.height/2, zeye,
+                                          size.width/2, size.height/2, 0,
+                                          0.0f, 1.0f, 0.0f);
+                        break;
+                }
+                        
+                case kCCDirectorProjectionCustom:
+                        if( projectionDelegate_ )
+                                [projectionDelegate_ updateProjection];
+                        break;
+                        
+                default:
+                        CCLOG(@"cocos2d: Director: unrecognized projecgtion");
+                        break;
+        }
+        
+        projection_ = projection;
+}
+
+#pragma mark Director Integration with a UIKit view
+
+-(void) setOpenGLView:(EAGLView *)view
+{
+        if( view != openGLView_ ) {
+
+                [super setOpenGLView:view];
+
+                // set size
+                winSizeInPixels_ = CGSizeMake(winSizeInPoints_.width * __ccContentScaleFactor, winSizeInPoints_.height *__ccContentScaleFactor);
+                
+                if( __ccContentScaleFactor != 1 )
+                        [self updateContentScaleFactor];
+                
+                CCTouchDispatcher *touchDispatcher = [CCTouchDispatcher sharedDispatcher];
+                [openGLView_ setTouchDelegate: touchDispatcher];
+                [touchDispatcher setDispatchEvents: YES];
+        }
+}
+
+#pragma mark Director - Retina Display
+
+-(CGFloat) contentScaleFactor
+{
+        return __ccContentScaleFactor;
+}
+
+-(void) setContentScaleFactor:(CGFloat)scaleFactor
+{
+        if( scaleFactor != __ccContentScaleFactor ) {
+                
+                __ccContentScaleFactor = scaleFactor;
+                winSizeInPixels_ = CGSizeMake( winSizeInPoints_.width * scaleFactor, winSizeInPoints_.height * scaleFactor );
+                
+                if( openGLView_ )
+                        [self updateContentScaleFactor];
+                
+                // update projection
+                [self setProjection:projection_];
+        }
+}
+
+-(void) updateContentScaleFactor
+{
+        // Based on code snippet from: http://developer.apple.com/iphone/prerelease/library/snippets/sp2010/sp28.html
+        if ([openGLView_ respondsToSelector:@selector(setContentScaleFactor:)])
+        {                       
+                [openGLView_ setContentScaleFactor: __ccContentScaleFactor];
+                
+                isContentScaleSupported_ = YES;
+        }
+        else
+                CCLOG(@"cocos2d: 'setContentScaleFactor:' is not supported on this device");
+}
+
+-(BOOL) enableRetinaDisplay:(BOOL)enabled
+{
+        // Already enabled ?
+        if( enabled && __ccContentScaleFactor == 2 )
+                return YES;
+        
+        // Already disabled
+        if( ! enabled && __ccContentScaleFactor == 1 )
+                return YES;
+
+        // setContentScaleFactor is not supported
+        if (! [openGLView_ respondsToSelector:@selector(setContentScaleFactor:)])
+                return NO;
+
+        // SD device
+        if ([[UIScreen mainScreen] scale] == 1.0)
+                return NO;
+
+        float newScale = enabled ? 2 : 1;
+        [self setContentScaleFactor:newScale];
+        
+        return YES;
+}
+
+// overriden, don't call super
+-(void) reshapeProjection:(CGSize)size
+{
+        winSizeInPoints_ = [openGLView_ bounds].size;
+        winSizeInPixels_ = CGSizeMake(winSizeInPoints_.width * __ccContentScaleFactor, winSizeInPoints_.height *__ccContentScaleFactor);
+        
+        [self setProjection:projection_];
+}
+
+#pragma mark Director Scene Landscape
+
+-(CGPoint)convertToGL:(CGPoint)uiPoint
+{
+        CGSize s = winSizeInPoints_;
+        float newY = s.height - uiPoint.y;
+        float newX = s.width - uiPoint.x;
+        
+        CGPoint ret = CGPointZero;
+        switch ( deviceOrientation_) {
+                case CCDeviceOrientationPortrait:
+                        ret = ccp( uiPoint.x, newY );
+                        break;
+                case CCDeviceOrientationPortraitUpsideDown:
+                        ret = ccp(newX, uiPoint.y);
+                        break;
+                case CCDeviceOrientationLandscapeLeft:
+                        ret.x = uiPoint.y;
+                        ret.y = uiPoint.x;
+                        break;
+                case CCDeviceOrientationLandscapeRight:
+                        ret.x = newY;
+                        ret.y = newX;
+                        break;
+        }
+        return ret;
+}
+
+-(CGPoint)convertToUI:(CGPoint)glPoint
+{
+        CGSize winSize = winSizeInPoints_;
+        int oppositeX = winSize.width - glPoint.x;
+        int oppositeY = winSize.height - glPoint.y;
+        CGPoint uiPoint = CGPointZero;
+        switch ( deviceOrientation_) {
+                case CCDeviceOrientationPortrait:
+                        uiPoint = ccp(glPoint.x, oppositeY);
+                        break;
+                case CCDeviceOrientationPortraitUpsideDown:
+                        uiPoint = ccp(oppositeX, glPoint.y);
+                        break;
+                case CCDeviceOrientationLandscapeLeft:
+                        uiPoint = ccp(glPoint.y, glPoint.x);
+                        break;
+                case CCDeviceOrientationLandscapeRight:
+                        // Can't use oppositeX/Y because x/y are flipped
+                        uiPoint = ccp(winSize.width-glPoint.y, winSize.height-glPoint.x);
+                        break;
+        }
+        return uiPoint;
+}
+
+// get the current size of the glview
+-(CGSize) winSize
+{
+        CGSize s = winSizeInPoints_;
+        
+        if( deviceOrientation_ == CCDeviceOrientationLandscapeLeft || deviceOrientation_ == CCDeviceOrientationLandscapeRight ) {
+                // swap x,y in landscape mode
+                CGSize tmp = s;
+                s.width = tmp.height;
+                s.height = tmp.width;
+        }
+        return s;
+}
+
+-(CGSize) winSizeInPixels
+{
+        CGSize s = [self winSize];
+        
+        s.width *= CC_CONTENT_SCALE_FACTOR();
+        s.height *= CC_CONTENT_SCALE_FACTOR();
+        
+        return s;
+}
+
+-(ccDeviceOrientation) deviceOrientation
+{
+        return deviceOrientation_;
+}
+
+- (void) setDeviceOrientation:(ccDeviceOrientation) orientation
+{
+        if( deviceOrientation_ != orientation ) {
+                deviceOrientation_ = orientation;
+                switch( deviceOrientation_) {
+                        case CCDeviceOrientationPortrait:
+                                [[UIApplication sharedApplication] setStatusBarOrientation: UIInterfaceOrientationPortrait animated:NO];
+                                break;
+                        case CCDeviceOrientationPortraitUpsideDown:
+                                [[UIApplication sharedApplication] setStatusBarOrientation: UIInterfaceOrientationPortraitUpsideDown animated:NO];
+                                break;
+                        case CCDeviceOrientationLandscapeLeft:
+                                [[UIApplication sharedApplication] setStatusBarOrientation: UIInterfaceOrientationLandscapeRight animated:NO];
+                                break;
+                        case CCDeviceOrientationLandscapeRight:
+                                [[UIApplication sharedApplication] setStatusBarOrientation: UIInterfaceOrientationLandscapeLeft animated:NO];
+                                break;
+                        default:
+                                NSLog(@"Director: Unknown device orientation");
+                                break;
+                }
+        }
+}
+
+-(void) applyOrientation
+{       
+        CGSize s = winSizeInPixels_;
+        float w = s.width / 2;
+        float h = s.height / 2;
+        
+        // XXX it's using hardcoded values.
+        // What if the the screen size changes in the future?
+        switch ( deviceOrientation_ ) {
+                case CCDeviceOrientationPortrait:
+                        // nothing
+                        break;
+                case CCDeviceOrientationPortraitUpsideDown:
+                        // upside down
+                        glTranslatef(w,h,0);
+                        glRotatef(180,0,0,1);
+                        glTranslatef(-w,-h,0);
+                        break;
+                case CCDeviceOrientationLandscapeRight:
+                        glTranslatef(w,h,0);
+                        glRotatef(90,0,0,1);
+                        glTranslatef(-h,-w,0);
+                        break;
+                case CCDeviceOrientationLandscapeLeft:
+                        glTranslatef(w,h,0);
+                        glRotatef(-90,0,0,1);
+                        glTranslatef(-h,-w,0);
+                        break;
+        }       
+}
+
+-(void) end
+{
+        // don't release the event handlers
+        // They are needed in case the director is run again
+        [[CCTouchDispatcher sharedDispatcher] removeAllDelegates];
+        
+        [super end];
+}
+
+@end
+
+
+#pragma mark -
+#pragma mark Director TimerDirector
+
+@implementation CCDirectorTimer
+- (void)startAnimation
+{
+        NSAssert( animationTimer == nil, @"animationTimer must be nil. Calling startAnimation twice?");
+        
+        if( gettimeofday( &lastUpdate_, NULL) != 0 ) {
+                CCLOG(@"cocos2d: Director: Error in gettimeofday");
+        }
+        
+        animationTimer = [NSTimer scheduledTimerWithTimeInterval:animationInterval_ target:self selector:@selector(mainLoop) userInfo:nil repeats:YES];
+        
+        //
+        //      If you want to attach the opengl view into UIScrollView
+        //  uncomment this line to prevent 'freezing'.
+        //      It doesn't work on with the Fast Director
+        //
+        //      [[NSRunLoop currentRunLoop] addTimer:animationTimer
+        //                                                               forMode:NSRunLoopCommonModes];
+}
+
+-(void) mainLoop
+{
+        [self drawScene];
+}
+
+- (void)stopAnimation
+{
+        [animationTimer invalidate];
+        animationTimer = nil;
+}
+
+- (void)setAnimationInterval:(NSTimeInterval)interval
+{
+        animationInterval_ = interval;
+        
+        if(animationTimer) {
+                [self stopAnimation];
+                [self startAnimation];
+        }
+}
+
+-(void) dealloc
+{
+        [animationTimer release];
+        [super dealloc];
+}
+@end
+
+
+#pragma mark -
+#pragma mark Director DirectorFast
+
+@implementation CCDirectorFast
+
+- (id) init
+{
+        if(( self = [super init] )) {
+                
+#if CC_DIRECTOR_DISPATCH_FAST_EVENTS
+                CCLOG(@"cocos2d: Fast Events enabled");
+#else
+                CCLOG(@"cocos2d: Fast Events disabled");
+#endif          
+                isRunning = NO;
+                
+                // XXX:
+                // XXX: Don't create any autorelease object before calling "fast director"
+                // XXX: else it will be leaked
+                // XXX:
+                autoreleasePool = [NSAutoreleasePool new];
+        }
+
+        return self;
+}
+
+- (void) startAnimation
+{
+        NSAssert( isRunning == NO, @"isRunning must be NO. Calling startAnimation twice?");
+
+        // XXX:
+        // XXX: release autorelease objects created
+        // XXX: between "use fast director" and "runWithScene"
+        // XXX:
+        [autoreleasePool release];
+        autoreleasePool = nil;
+
+        if ( gettimeofday( &lastUpdate_, NULL) != 0 ) {
+                CCLOG(@"cocos2d: Director: Error in gettimeofday");
+        }
+        
+
+        isRunning = YES;
+
+        SEL selector = @selector(mainLoop);
+        NSMethodSignature* sig = [[[CCDirector sharedDirector] class]
+                                                          instanceMethodSignatureForSelector:selector];
+        NSInvocation* invocation = [NSInvocation
+                                                                invocationWithMethodSignature:sig];
+        [invocation setTarget:[CCDirector sharedDirector]];
+        [invocation setSelector:selector];
+        [invocation performSelectorOnMainThread:@selector(invokeWithTarget:)
+                                                                 withObject:[CCDirector sharedDirector] waitUntilDone:NO];
+        
+//      NSInvocationOperation *loopOperation = [[[NSInvocationOperation alloc]
+//                                                                                       initWithTarget:self selector:@selector(mainLoop) object:nil]
+//                                                                                      autorelease];
+//      
+//      [loopOperation performSelectorOnMainThread:@selector(start) withObject:nil
+//                                                               waitUntilDone:NO];
+}
+
+-(void) mainLoop
+{
+        while (isRunning) {
+        
+                NSAutoreleasePool *loopPool = [NSAutoreleasePool new];
+
+#if CC_DIRECTOR_DISPATCH_FAST_EVENTS
+                while( CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.004f, FALSE) == kCFRunLoopRunHandledSource);
+#else
+                while(CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, TRUE) == kCFRunLoopRunHandledSource);
+#endif
+
+                if (isPaused_) {
+                        usleep(250000); // Sleep for a quarter of a second (250,000 microseconds) so that the framerate is 4 fps.
+                }
+                
+                [self drawScene];               
+
+#if CC_DIRECTOR_DISPATCH_FAST_EVENTS
+                while( CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.004f, FALSE) == kCFRunLoopRunHandledSource);
+#else
+                while(CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, TRUE) == kCFRunLoopRunHandledSource);
+#endif
+
+                [loopPool release];
+        }       
+}
+- (void) stopAnimation
+{
+        isRunning = NO;
+}
+
+- (void)setAnimationInterval:(NSTimeInterval)interval
+{
+        NSLog(@"FastDirectory doesn't support setAnimationInterval, yet");
+}
+@end
+
+#pragma mark -
+#pragma mark Director DirectorThreadedFast
+
+@implementation CCDirectorFastThreaded
+
+- (id) init
+{
+        if(( self = [super init] )) {           
+                isRunning = NO;         
+        }
+        
+        return self;
+}
+
+- (void) startAnimation
+{
+        NSAssert( isRunning == NO, @"isRunning must be NO. Calling startAnimation twice?");
+
+        if ( gettimeofday( &lastUpdate_, NULL) != 0 ) {
+                CCLOG(@"cocos2d: ThreadedFastDirector: Error on gettimeofday");
+        }
+
+        isRunning = YES;
+
+        NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(mainLoop) object:nil];
+        [thread start];
+        [thread release];
+}
+
+-(void) mainLoop
+{
+        while( ![[NSThread currentThread] isCancelled] ) {
+                if( isRunning )
+                        [self performSelectorOnMainThread:@selector(drawScene) withObject:nil waitUntilDone:YES];
+                                
+                if (isPaused_) {
+                        usleep(250000); // Sleep for a quarter of a second (250,000 microseconds) so that the framerate is 4 fps.
+                } else {
+//                      usleep(2000);
+                }
+        }       
+}
+- (void) stopAnimation
+{
+        isRunning = NO;
+}
+
+- (void)setAnimationInterval:(NSTimeInterval)interval
+{
+        NSLog(@"FastDirector doesn't support setAnimationInterval, yet");
+}
+@end
+
+#pragma mark -
+#pragma mark DirectorDisplayLink
+
+// Allows building DisplayLinkDirector for pre-3.1 SDKS
+// without getting compiler warnings.
+@interface NSObject(CADisplayLink)
++ (id) displayLinkWithTarget:(id)arg1 selector:(SEL)arg2;
+- (void) addToRunLoop:(id)arg1 forMode:(id)arg2;
+- (void) setFrameInterval:(int)interval;
+- (void) invalidate;
+@end
+
+@implementation CCDirectorDisplayLink
+
+- (void)setAnimationInterval:(NSTimeInterval)interval
+{
+        animationInterval_ = interval;
+        if(displayLink){
+                [self stopAnimation];
+                [self startAnimation];
+        }
+}
+
+- (void) startAnimation
+{
+        NSAssert( displayLink == nil, @"displayLink must be nil. Calling startAnimation twice?");
+
+        if ( gettimeofday( &lastUpdate_, NULL) != 0 ) {
+                CCLOG(@"cocos2d: DisplayLinkDirector: Error on gettimeofday");
+        }
+        
+        // approximate frame rate
+        // assumes device refreshes at 60 fps
+        int frameInterval = (int) floor(animationInterval_ * 60.0f);
+        
+        CCLOG(@"cocos2d: Frame interval: %d", frameInterval);
+
+        displayLink = [NSClassFromString(@"CADisplayLink") displayLinkWithTarget:self selector:@selector(mainLoop:)];
+        [displayLink setFrameInterval:frameInterval];
+        [displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
+}
+
+-(void) mainLoop:(id)sender
+{
+        [self drawScene];       
+}
+
+- (void) stopAnimation
+{
+        [displayLink invalidate];
+        displayLink = nil;
+}
+
+-(void) dealloc
+{
+        [displayLink release];
+        [super dealloc];
+}
+@end
+
+#endif // __IPHONE_OS_VERSION_MAX_ALLOWED