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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 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.
+ */
+
+
+/* Idea of decoupling Window from Director taken from OC3D project: http://code.google.com/p/oc3d/
+ */
+
+#import <unistd.h>
+#import <Availability.h>
+
+// cocos2d imports
+#import "CCDirector.h"
+#import "CCScheduler.h"
+#import "CCActionManager.h"
+#import "CCTextureCache.h"
+#import "CCAnimationCache.h"
+#import "CCLabelAtlas.h"
+#import "ccMacros.h"
+#import "CCTransition.h"
+#import "CCScene.h"
+#import "CCSpriteFrameCache.h"
+#import "CCTexture2D.h"
+#import "CCLabelBMFont.h"
+#import "CCLayer.h"
+
+// support imports
+#import "Platforms/CCGL.h"
+#import "Platforms/CCNS.h"
+
+#import "Support/OpenGL_Internal.h"
+#import "Support/CGPointExtension.h"
+
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+#import "Platforms/iOS/CCDirectorIOS.h"
+#define CC_DIRECTOR_DEFAULT CCDirectorTimer
+#elif defined(__MAC_OS_X_VERSION_MAX_ALLOWED)
+#import "Platforms/Mac/CCDirectorMac.h"
+#define CC_DIRECTOR_DEFAULT CCDirectorDisplayLink
+#endif
+
+#import "Support/CCProfiling.h"
+
+#define kDefaultFPS             60.0    // 60 frames per second
+
+extern NSString * cocos2dVersion(void);
+
+
+@interface CCDirector (Private)
+-(void) setNextScene;
+// shows the FPS in the screen
+-(void) showFPS;
+// calculates delta time since last time it was called
+-(void) calculateDeltaTime;
+@end
+
+@implementation CCDirector
+
+@synthesize animationInterval = animationInterval_;
+@synthesize runningScene = runningScene_;
+@synthesize displayFPS = displayFPS_;
+@synthesize nextDeltaTimeZero = nextDeltaTimeZero_;
+@synthesize isPaused = isPaused_;
+@synthesize sendCleanupToScene = sendCleanupToScene_;
+@synthesize runningThread = runningThread_;
+@synthesize notificationNode = notificationNode_;
+@synthesize projectionDelegate = projectionDelegate_;
+@synthesize frames = frames_;
+//
+// singleton stuff
+//
+static CCDirector *_sharedDirector = nil;
+
++ (CCDirector *)sharedDirector
+{
+        if (!_sharedDirector) {
+
+                //
+                // Default Director is TimerDirector
+                // 
+                if( [ [CCDirector class] isEqual:[self class]] )
+                        _sharedDirector = [[CC_DIRECTOR_DEFAULT alloc] init];
+                else
+                        _sharedDirector = [[self alloc] init];
+        }
+                
+        return _sharedDirector;
+}
+
++(id)alloc
+{
+        NSAssert(_sharedDirector == nil, @"Attempted to allocate a second instance of a singleton.");
+        return [super alloc];
+}
+
+- (id) init
+{  
+        CCLOG(@"cocos2d: %@", cocos2dVersion() );
+
+        if( (self=[super init]) ) {
+
+                CCLOG(@"cocos2d: Using Director Type:%@", [self class]);
+                
+                // scenes
+                runningScene_ = nil;
+                nextScene_ = nil;
+                
+                notificationNode_ = nil;
+                
+                oldAnimationInterval_ = animationInterval_ = 1.0 / kDefaultFPS;
+                scenesStack_ = [[NSMutableArray alloc] initWithCapacity:10];
+                
+                // Set default projection (3D)
+                projection_ = kCCDirectorProjectionDefault;
+
+                // projection delegate if "Custom" projection is used
+                projectionDelegate_ = nil;
+
+                // FPS
+                displayFPS_ = NO;
+                frames_ = 0;
+                
+                // paused ?
+                isPaused_ = NO;
+                
+                // running thread
+                runningThread_ = nil;
+                
+                winSizeInPixels_ = winSizeInPoints_ = CGSizeZero;
+        }
+
+        return self;
+}
+
+- (void) dealloc
+{
+        CCLOGINFO(@"cocos2d: deallocing %@", self);
+
+#if CC_DIRECTOR_FAST_FPS
+        [FPSLabel_ release];
+#endif
+        [runningScene_ release];
+        [notificationNode_ release];
+        [scenesStack_ release];
+        
+        [projectionDelegate_ release];
+        
+        _sharedDirector = nil;
+        
+        [super dealloc];
+}
+
+-(void) setGLDefaultValues
+{
+        // This method SHOULD be called only after openGLView_ was initialized
+        NSAssert( openGLView_, @"openGLView_ must be initialized");
+
+        [self setAlphaBlending: YES];
+        [self setDepthTest: YES];
+        [self setProjection: projection_];
+        
+        // set other opengl default values
+        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+        
+#if CC_DIRECTOR_FAST_FPS
+    if (!FPSLabel_) {
+                CCTexture2DPixelFormat currentFormat = [CCTexture2D defaultAlphaPixelFormat];
+                [CCTexture2D setDefaultAlphaPixelFormat:kCCTexture2DPixelFormat_RGBA4444];
+                FPSLabel_ = [[CCLabelAtlas labelWithString:@"00.0" charMapFile:@"fps_images.png" itemWidth:16 itemHeight:24 startCharMap:'.'] retain];
+                [CCTexture2D setDefaultAlphaPixelFormat:currentFormat];         
+        }
+#endif  // CC_DIRECTOR_FAST_FPS
+}
+
+//
+// Draw the Scene
+//
+- (void) drawScene
+{ 
+        // Override me
+}
+
+-(void) calculateDeltaTime
+{
+        struct timeval now;
+        
+        if( gettimeofday( &now, NULL) != 0 ) {
+                CCLOG(@"cocos2d: error in gettimeofday");
+                dt = 0;
+                return;
+        }
+        
+        // new delta time
+        if( nextDeltaTimeZero_ ) {
+                dt = 0;
+                nextDeltaTimeZero_ = NO;
+        } else {
+                dt = (now.tv_sec - lastUpdate_.tv_sec) + (now.tv_usec - lastUpdate_.tv_usec) / 1000000.0f;
+                dt = MAX(0,dt);
+        }
+
+#ifdef DEBUG
+        // If we are debugging our code, prevent big delta time
+        if( dt > 0.2f )
+                dt = 1/60.0f;
+#endif
+        
+        lastUpdate_ = now;      
+}
+
+#pragma mark Director - Memory Helper
+
+-(void) purgeCachedData
+{
+        [CCLabelBMFont purgeCachedData];        
+        [[CCTextureCache sharedTextureCache] removeUnusedTextures];     
+}
+
+#pragma mark Director - Scene OpenGL Helper
+
+-(ccDirectorProjection) projection
+{
+        return projection_;
+}
+
+-(float) getZEye
+{
+        return ( winSizeInPixels_.height / 1.1566f );
+}
+
+-(void) setProjection:(ccDirectorProjection)projection
+{
+        CCLOG(@"cocos2d: override me");
+}
+
+- (void) setAlphaBlending: (BOOL) on
+{
+        if (on) {
+                glEnable(GL_BLEND);
+                glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
+                
+        } else
+                glDisable(GL_BLEND);
+}
+
+- (void) setDepthTest: (BOOL) on
+{
+        if (on) {
+                ccglClearDepth(1.0f);
+                glEnable(GL_DEPTH_TEST);
+                glDepthFunc(GL_LEQUAL);
+//              glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+        } else
+                glDisable( GL_DEPTH_TEST );
+}
+
+#pragma mark Director Integration with a UIKit view
+
+-(CC_GLVIEW*) openGLView
+{
+        return openGLView_;
+}
+
+-(void) setOpenGLView:(CC_GLVIEW *)view
+{
+        NSAssert( view, @"OpenGLView must be non-nil");
+
+        if( view != openGLView_ ) {
+                [openGLView_ release];
+                openGLView_ = [view retain];
+                
+                // set size
+                winSizeInPixels_ = winSizeInPoints_ = CCNSSizeToCGSize( [view bounds].size );
+
+                [self setGLDefaultValues];
+        }
+}
+
+#pragma mark Director Scene Landscape
+
+-(CGPoint)convertToGL:(CGPoint)uiPoint
+{
+        CCLOG(@"CCDirector#convertToGL: OVERRIDE ME.");
+        return CGPointZero;
+}
+
+-(CGPoint)convertToUI:(CGPoint)glPoint
+{
+        CCLOG(@"CCDirector#convertToUI: OVERRIDE ME.");
+        return CGPointZero;
+}
+
+-(CGSize)winSize
+{
+        return winSizeInPoints_;
+}
+
+-(CGSize)winSizeInPixels
+{
+        return winSizeInPixels_;
+}
+
+-(CGSize)displaySizeInPixels
+{
+        return winSizeInPixels_;
+}
+
+-(void) reshapeProjection:(CGSize)newWindowSize
+{
+        winSizeInPixels_ = winSizeInPoints_ = newWindowSize;
+        [self setProjection:projection_];
+}
+
+#pragma mark Director Scene Management
+
+- (void)runWithScene:(CCScene*) scene
+{
+        NSAssert( scene != nil, @"Argument must be non-nil");
+        NSAssert( runningScene_ == nil, @"You can't run an scene if another Scene is running. Use replaceScene or pushScene instead");
+        
+        [self pushScene:scene];
+        [self startAnimation];  
+}
+
+-(void) replaceScene: (CCScene*) scene
+{
+        NSAssert( scene != nil, @"Argument must be non-nil");
+
+        NSUInteger index = [scenesStack_ count];
+        
+        sendCleanupToScene_ = YES;
+        [scenesStack_ replaceObjectAtIndex:index-1 withObject:scene];
+        nextScene_ = scene;     // nextScene_ is a weak ref
+}
+
+- (void) pushScene: (CCScene*) scene
+{
+        NSAssert( scene != nil, @"Argument must be non-nil");
+
+        sendCleanupToScene_ = NO;
+
+        [scenesStack_ addObject: scene];
+        nextScene_ = scene;     // nextScene_ is a weak ref
+}
+
+-(void) popScene
+{       
+        NSAssert( runningScene_ != nil, @"A running Scene is needed");
+
+        [scenesStack_ removeLastObject];
+        NSUInteger c = [scenesStack_ count];
+        
+        if( c == 0 )
+                [self end];
+        else {
+                sendCleanupToScene_ = YES;
+                nextScene_ = [scenesStack_ objectAtIndex:c-1];
+        }
+}
+
+-(void) end
+{
+        [runningScene_ onExit];
+        [runningScene_ cleanup];
+        [runningScene_ release];
+
+        runningScene_ = nil;
+        nextScene_ = nil;
+        
+        // remove all objects, but don't release it.
+        // runWithScene might be executed after 'end'.
+        [scenesStack_ removeAllObjects];
+        
+        [self stopAnimation];
+        
+#if CC_DIRECTOR_FAST_FPS
+        [FPSLabel_ release];
+        FPSLabel_ = nil;
+#endif  
+
+        [projectionDelegate_ release];
+        projectionDelegate_ = nil;
+        
+        // Purge bitmap cache
+        [CCLabelBMFont purgeCachedData];
+
+        // Purge all managers
+        [CCAnimationCache purgeSharedAnimationCache];
+        [CCSpriteFrameCache purgeSharedSpriteFrameCache];
+        [CCScheduler purgeSharedScheduler];
+        [CCActionManager purgeSharedManager];
+        [CCTextureCache purgeSharedTextureCache];
+        
+        
+        // OpenGL view
+        
+        // Since the director doesn't attach the openglview to the window
+        // it shouldn't remove it from the window too.
+//      [openGLView_ removeFromSuperview];
+
+        [openGLView_ release];
+        openGLView_ = nil;      
+}
+
+-(void) setNextScene
+{
+        Class transClass = [CCTransitionScene class];
+        BOOL runningIsTransition = [runningScene_ isKindOfClass:transClass];
+        BOOL newIsTransition = [nextScene_ isKindOfClass:transClass];
+
+        // If it is not a transition, call onExit/cleanup
+        if( ! newIsTransition ) {
+                [runningScene_ onExit];
+
+                // issue #709. the root node (scene) should receive the cleanup message too
+                // otherwise it might be leaked.
+                if( sendCleanupToScene_)
+                        [runningScene_ cleanup];
+        }
+
+        [runningScene_ release];
+        
+        runningScene_ = [nextScene_ retain];
+        nextScene_ = nil;
+
+        if( ! runningIsTransition ) {
+                [runningScene_ onEnter];
+                [runningScene_ onEnterTransitionDidFinish];
+        }
+}
+
+-(void) pause
+{
+        if( isPaused_ )
+                return;
+
+        oldAnimationInterval_ = animationInterval_;
+        
+        // when paused, don't consume CPU
+        [self setAnimationInterval:1/4.0];
+        isPaused_ = YES;
+}
+
+-(void) resume
+{
+        if( ! isPaused_ )
+                return;
+        
+        [self setAnimationInterval: oldAnimationInterval_];
+
+        if( gettimeofday( &lastUpdate_, NULL) != 0 ) {
+                CCLOG(@"cocos2d: Director: Error in gettimeofday");
+        }
+        
+        isPaused_ = NO;
+        dt = 0;
+}
+
+- (void)startAnimation
+{
+        CCLOG(@"cocos2d: Director#startAnimation. Override me");
+}
+
+- (void)stopAnimation
+{
+        CCLOG(@"cocos2d: Director#stopAnimation. Override me");
+}
+
+- (void)setAnimationInterval:(NSTimeInterval)interval
+{
+        CCLOG(@"cocos2d: Director#setAnimationInterval. Override me");
+}
+
+#if CC_DIRECTOR_FAST_FPS
+
+// display the FPS using a LabelAtlas
+// updates the FPS every frame
+-(void) showFPS
+{
+        frames_++;
+        accumDt_ += dt;
+        
+        if ( accumDt_ > CC_DIRECTOR_FPS_INTERVAL)  {
+                frameRate_ = frames_/accumDt_;
+                frames_ = 0;
+                accumDt_ = 0;
+
+//              sprintf(format,"%.1f",frameRate);
+//              [FPSLabel setCString:format];
+
+                NSString *str = [[NSString alloc] initWithFormat:@"%.1f", frameRate_];
+                [FPSLabel_ setString:str];
+                [str release];
+        }
+
+        [FPSLabel_ draw];
+}
+#else
+// display the FPS using a manually generated Texture (very slow)
+// updates the FPS 3 times per second aprox.
+-(void) showFPS
+{
+        frames_++;
+        accumDt_ += dt;
+        
+        if ( accumDt_ > CC_DIRECTOR_FPS_INTERVAL)  {
+                frameRate_ = frames_/accumDt_;
+                frames_ = 0;
+                accumDt_ = 0;
+        }
+        
+        NSString *str = [NSString stringWithFormat:@"%.2f",frameRate_];
+        CCTexture2D *texture = [[CCTexture2D alloc] initWithString:str dimensions:CGSizeMake(100,30) alignment:CCTextAlignmentLeft fontName:@"Arial" fontSize:24];
+
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Unneeded states: GL_COLOR_ARRAY
+        glDisableClientState(GL_COLOR_ARRAY);
+        
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        
+        glColor4ub(224,224,244,200);
+        [texture drawAtPoint: ccp(5,2)];
+        [texture release];
+        
+        glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
+        
+        // restore default GL state
+        glEnableClientState(GL_COLOR_ARRAY);
+}
+#endif
+
+- (void) showProfilers {
+#if CC_ENABLE_PROFILERS
+        accumDtForProfiler_ += dt;
+        if (accumDtForProfiler_ > 1.0f) {
+                accumDtForProfiler_ = 0;
+                [[CCProfiler sharedProfiler] displayTimers];
+        }
+#endif // CC_ENABLE_PROFILERS
+}
+
+@end
+