axmol/cocos2dx/platform/CCDirector_mobile.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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****************************************************************************/

#include "CCDirector.h"
#include "CCScene.h"
#include "NSMutableArray.h"
#include "CCScheduler.h"
#include "ccMacros.h"
#include "CCXCocos2dDefine.h"
#include "CCTouchDispatcher.h"
#include "support/opengl_support/glu.h"
#include "CGPointExtension.h"
#include "CCTransition.h"
#include "CCTextureCache.h"
#include "CCTransition.h"
#include "CCSpriteFrameCache.h"
#include "NSAutoreleasePool.h"
#include "platform/platform.h"
#include "CCXApplication.h"
#include "CCLabelBMFont.h"
#include "CCActionManager.h"
#include "CCLabelTTF.h"
#include "CCConfiguration.h"
#include "CCKeypadDispatcher.h"
#include "CCGL.h"

#if CC_ENABLE_PROFILERS
#include "support/CCProfiling.h"
#endif // CC_ENABLE_PROFILERS

#include <string>

using namespace std;
using namespace cocos2d;
namespace  cocos2d 
{

// singleton stuff
static CCDisplayLinkDirector s_sharedDirector;
static bool s_bFirstRun = true;

#define kDefaultFPS		60  // 60 frames per second
extern const char* cocos2dVersion(void);

CCDirector* CCDirector::sharedDirector(void)
{
	if (s_bFirstRun)
	{
		s_sharedDirector.init();
        s_bFirstRun = false;
	}

	return &s_sharedDirector;
}

bool CCDirector::init(void)
{
	CCLOG("cocos2d: %s", cocos2dVersion());

	CCLOG("cocos2d: Using Director Type: CCDirectorDisplayLink");

	// scenes
	m_pRunningScene = NULL;
	m_pNextScene = NULL;

	m_pNotificationNode = NULL;

	m_dOldAnimationInterval = m_dAnimationInterval = 1.0 / kDefaultFPS;	
	m_pobScenesStack = new NSMutableArray<CCScene*>();

	// Set default projection (3D)
	m_eProjection = kCCDirectorProjectionDefault;

	// projection delegate if "Custom" projection is used
	m_pProjectionDelegate = NULL;

	// FPS
	m_bDisplayFPS = false;
	m_nFrames = 0;
	m_pszFPS = new char[10];
	m_fExpectedFrameRate = (ccTime)(1 / m_dAnimationInterval);
	m_fComputeFrameRateDeltaTime = 0;
	m_pLastComputeFrameRate = new struct cc_timeval();
	m_pLastUpdate = new struct cc_timeval();

	// paused ?
	m_bPaused = false;

	m_obWinSizeInPixels = m_obWinSizeInPoints = CGSizeZero;

	// default values
	m_ePixelFormat = kCCPixelFormatDefault;
	m_eDepthBufferFormat = kCCDepthBufferNone; // 0

	// portrait mode default
	m_eDeviceOrientation = CCDeviceOrientationPortrait;		

	m_pobOpenGLView = NULL;

    m_fContentScaleFactor = 1;	
	m_bIsContentScaleSupported = false;

	// create autorelease pool
	NSPoolManager::getInstance()->push();

	return true;
}

CCDirector::~CCDirector(void)
{
	CCLOGINFO("cocos2d: deallocing %p", this);

#if CC_DIRECTOR_FAST_FPS
	CCX_SAFE_RELEASE(m_pFPSLabel);
#endif 
    
	CCX_SAFE_RELEASE(m_pRunningScene);
	CCX_SAFE_RELEASE(m_pNotificationNode);
	CCX_SAFE_RELEASE(m_pobScenesStack);

	// pop the autorelease pool
	NSPoolManager::getInstance()->pop();

	// delete m_pLastUpdate
	CCX_SAFE_DELETE(m_pLastUpdate);

	// delete last compute time
	CCX_SAFE_DELETE(m_pLastComputeFrameRate);

    CCKeypadDispatcher::purgeSharedDispatcher();

	// delete fps string
	delete []m_pszFPS;
}

void CCDirector::setGLDefaultValues(void)
{
	// This method SHOULD be called only after openGLView_ was initialized
	assert(m_pobOpenGLView);

	setAlphaBlending(true);
	setDepthTest(true);
	setProjection(m_eProjection);

	// set other opengl default values
	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

#if CC_DIRECTOR_FAST_FPS
	if (! m_pFPSLabel)
	{
        m_pFPSLabel = CCLabelTTF::labelWithString("00.0", "XXX", 24);
		m_pFPSLabel->retain();
	}
#endif
}

// Draw the SCene
void CCDirector::drawScene(void)
{
	// calculate "global" dt
	calculateDeltaTime();

	//tick before glClear: issue #533
	if (! m_bPaused)
	{
		CCScheduler::sharedScheduler()->tick(m_fDeltaTime);
	}

	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 (m_pNextScene)
	{
		setNextScene();
	}

	glPushMatrix();

	applyOrientation();

	// By default enable VertexArray, ColorArray, TextureCoordArray and Texture2D
	CC_ENABLE_DEFAULT_GL_STATES();

	// draw the scene
    if (m_pRunningScene)
    {
        m_pRunningScene->visit();
    }

	// draw the notifications node
	if (m_pNotificationNode)
	{
		m_pNotificationNode->visit();
	}

	if (m_bDisplayFPS)
	{
		showFPS();
	}

#if CC_ENABLE_PROFILERS
	showProfilers();
#endif

	CC_DISABLE_DEFAULT_GL_STATES();

	glPopMatrix();

	// swap buffers
	if (m_pobOpenGLView)
    {
        m_pobOpenGLView->swapBuffers();
    }
}

void CCDirector::calculateDeltaTime(void)
{
    struct cc_timeval now;

	if (CCTime::gettimeofdayCocos2d(&now, NULL) != 0)
	{
		CCLOG("error in gettimeofday");
        m_fDeltaTime = 0;
		return;
	}

	// new delta time
	if (m_bNextDeltaTimeZero)
	{
		m_fDeltaTime = 0;
		m_bNextDeltaTimeZero = false;
	}
	else
	{
		m_fDeltaTime = (now.tv_sec - m_pLastUpdate->tv_sec) + (now.tv_usec - m_pLastUpdate->tv_usec) / 1000000.0f;
		m_fDeltaTime = MAX(0, m_fDeltaTime);
	}

	*m_pLastUpdate = now;
}


// m_dAnimationInterval
void CCDirector::setAnimationInterval(double dValue)
{
	CCLOG("cocos2d: Director#setAnimationInterval. Overrride me");
	assert(0);
}


// m_pobOpenGLView

void CCDirector::setOpenGLView(CC_GLVIEW *pobOpenGLView)
{
	assert(pobOpenGLView);

	if (m_pobOpenGLView != pobOpenGLView)
	{
		// because EAGLView is not kind of NSObject
		delete m_pobOpenGLView; // [openGLView_ release]
		m_pobOpenGLView = pobOpenGLView;

		setGLDefaultValues();

		// set size
		m_obWinSizeInPoints = CCNSSizeToCGSize(m_pobOpenGLView->getSize());
		m_obWinSizeInPixels = CGSizeMake(m_obWinSizeInPoints.width * m_fContentScaleFactor, m_obWinSizeInPoints * m_fContentScaleFactor);

		if (m_fContentScaleFactor != 1)
		{
			updateContentScaleFactor();
		}

 		CCTouchDispatcher *pTouchDispatcher = CCTouchDispatcher::sharedDispatcher();
 		m_pobOpenGLView->setTouchDelegate(pTouchDispatcher);
        pTouchDispatcher->setDispatchEvents(true);		
	}
}

void CCDirector::setNextDeltaTimeZero(bool bNextDeltaTimeZero)
{
	m_bNextDeltaTimeZero = bNextDeltaTimeZero;
}

void CCDirector::setProjection(ccDirectorProjection kProjection)
{
	CGSize size = m_obWinSizeInPixels;
	switch (kProjection)
	{
	case kCCDirectorProjection2D:
		glViewport((GLsizei)0, (GLsizei)0, (GLsizei)size.width, (GLsizei)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:
		glViewport(0, 0, (GLsizei)size.width, (GLsizei)size.height);
		glMatrixMode(GL_PROJECTION);
		glLoadIdentity();
		gluPerspective(60, (GLfloat)size.width/size.height, 0.5f, 1500.0f);
			
		glMatrixMode(GL_MODELVIEW);	
		glLoadIdentity();
		gluLookAt( size.width/2, size.height/2, getZEye(),
				 size.width/2, size.height/2, 0,
				 0.0f, 1.0f, 0.0f);				
		break;
			
	case kCCDirectorProjectionCustom:
		if (m_pProjectionDelegate)
		{
			m_pProjectionDelegate->updateProjection();
		}
		break;
			
	default:
		CCLOG("cocos2d: Director: unrecognized projecgtion");
		break;
	}

	m_eProjection = kProjection;
}

void CCDirector::purgeCachedData(void)
{
    CCLabelBMFont::purgeCachedData();
	CCTextureCache::purgeSharedTextureCache();
}

float CCDirector::getZEye(void)
{
    return (m_obWinSizeInPixels.height / 1.1566f);	
}

void CCDirector::setAlphaBlending(bool bOn)
{
	if (bOn)
	{
		glEnable(GL_BLEND);
		glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
	}
	else
	{
		glDisable(GL_BLEND);
	}
}

void CCDirector::setDepthTest(bool bOn)
{
	if (bOn)
	{
		ccglClearDepth(1.0f);
		glEnable(GL_DEPTH_TEST);
		glDepthFunc(GL_LEQUAL);
		glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
	}
	else
	{
		glDisable(GL_DEPTH_TEST);
	}
}

CGPoint CCDirector::convertToGL(CGPoint obPoint)
{
	CGSize s = m_obWinSizeInPoints;
	float newY = s.height - obPoint.y;
	float newX = s.width - obPoint.x;

	CGPoint ret = CGPointZero;
	switch (m_eDeviceOrientation)
	{
	case CCDeviceOrientationPortrait:
		ret = ccp(obPoint.x, newY);
		break;
	case CCDeviceOrientationPortraitUpsideDown:
		ret = ccp(newX, obPoint.y);
		break;
	case CCDeviceOrientationLandscapeLeft:
		ret.x = obPoint.y;
		ret.y = obPoint.x;
		break;
	case CCDeviceOrientationLandscapeRight:
		ret.x = newY;
		ret.y = newX;
		break;
	}

// 	if (m_fContentScaleFactor != 1 && m_bIsContentScaleSupported)
// 	{
//         ret = ccpMult(ret, m_fContentScaleFactor);
// 	}
	
	return ret;
}

CGPoint CCDirector::convertToUI(CGPoint obPoint)
{
	CGSize winSize = m_obWinSizeInPoints;
	float oppositeX = winSize.width - obPoint.x;
	float oppositeY = winSize.height - obPoint.y;
	CGPoint uiPoint = CGPointZero;

	switch (m_eDeviceOrientation)
	{
	case CCDeviceOrientationPortrait:
		uiPoint = ccp(obPoint.x, oppositeY);
		break;
	case CCDeviceOrientationPortraitUpsideDown:
		uiPoint = ccp(oppositeX, obPoint.y);
		break;
	case CCDeviceOrientationLandscapeLeft:
		uiPoint = ccp(obPoint.y, obPoint.x);
		break;
	case CCDeviceOrientationLandscapeRight:
		// Can't use oppositeX/Y because x/y are flipped
		uiPoint = ccp(winSize.width - obPoint.y, winSize.height - obPoint.x);
		break;
	}

	uiPoint = ccpMult(uiPoint, 1/m_fContentScaleFactor);
	return uiPoint;
}

CGSize CCDirector::getWinSize(void)
{
	CGSize s = m_obWinSizeInPoints;

	if (m_eDeviceOrientation == CCDeviceOrientationLandscapeLeft
		|| m_eDeviceOrientation == CCDeviceOrientationLandscapeRight)
	{
		// swap x,y in landspace mode
		CGSize tmp = s;
		s.width = tmp.height;
		s.height = tmp.width;
	}

	return s;
}

CGSize CCDirector::getWinSizeInPixels()
{
	CGSize s = getWinSize();

	s.width *= CC_CONTENT_SCALE_FACTOR();
	s.height *= CC_CONTENT_SCALE_FACTOR();

	return s;
}

// return the current frame size
CGSize CCDirector::getDisplaySizeInPiXels(void)
{
	return m_obWinSizeInPixels;
}

void CCDirector::reshapeProjection(CGSize newWindowSize)
{
    m_obWinSizeInPoints = m_pobOpenGLView->getSize();
	m_obWinSizeInPixels = CGSizeMake(m_obWinSizeInPoints.width * m_fContentScaleFactor,
		                             m_obWinSizeInPoints.height * m_fContentScaleFactor);

	setProjection(m_eProjection);
}

// scene management

void CCDirector::runWithScene(CCScene *pScene)
{
	assert(pScene != NULL);
	assert(m_pRunningScene == NULL);

	pushScene(pScene);
	startAnimation();
}

void CCDirector::replaceScene(CCScene *pScene)
{
	assert(pScene != NULL);

	unsigned int index = m_pobScenesStack->count();

	m_bSendCleanupToScene = true;
	m_pobScenesStack->replaceObjectAtIndex(index - 1, pScene);

	m_pNextScene = pScene;
}

void CCDirector::pushScene(CCScene *pScene)
{
	assert(pScene);

	m_bSendCleanupToScene = false;

	m_pobScenesStack->addObject(pScene);
	m_pNextScene = pScene;
}

void CCDirector::popScene(void)
{
	assert(m_pRunningScene != NULL);

	m_pobScenesStack->removeLastObject();
	unsigned int c = m_pobScenesStack->count();

	if (c == 0)
	{
		end();
	}
	else
	{
		m_bSendCleanupToScene = true;
		m_pNextScene = m_pobScenesStack->getObjectAtIndex(c - 1);
	}
}

void CCDirector::end(void)
{
	// don't release the event handlers
	// They are needed in case the director is run again
	CCTouchDispatcher::sharedDispatcher()->removeAllDelegates();

	m_pRunningScene->onExit();
	m_pRunningScene->cleanup();
	m_pRunningScene->release();

	m_pRunningScene = NULL;
	m_pNextScene = NULL;

	// remove all objects, but don't release it.
	// runWithScene might be executed after 'end'.
	m_pobScenesStack->removeAllObjects();

	stopAnimation();

#if CC_DIRECTOR_FAST_FPS
	CCX_SAFE_RELEASE_NULL(m_pFPSLabel);
#endif

		CCX_SAFE_RELEASE_NULL(m_pProjectionDelegate);

	// purge bitmap cache
	CCLabelBMFont::purgeCachedData();

	// purge all managers
	CCAnimationCache::purgeSharedAnimationCache();
 	CCSpriteFrameCache::purgeSharedSpriteFrameCache();
	CCActionManager::sharedManager()->purgeSharedManager();
	CCScheduler::purgeSharedScheduler();
	CCTextureCache::purgeSharedTextureCache();

	// OpenGL view
	m_pobOpenGLView->release();
	m_pobOpenGLView = NULL;
}

void CCDirector::setNextScene(void)
{
	ccSceneFlag runningSceneType = ccNormalScene;
	ccSceneFlag newSceneType = m_pNextScene->getSceneType();

	if (m_pRunningScene)
	{
		runningSceneType = m_pRunningScene->getSceneType();
	}

	// If it is not a transition, call onExit/cleanup
 	/*if (! newIsTransition)*/
	if (! (newSceneType & ccTransitionScene))
 	{
         if (m_pRunningScene)
         {
             m_pRunningScene->onExit();
         }
 
 		// issue #709. the root node (scene) should receive the cleanup message too
 		// otherwise it might be leaked.
 		if (m_bSendCleanupToScene && m_pRunningScene)
 		{
 			m_pRunningScene->cleanup();
 		}
 	}

    if (m_pRunningScene)
    {
        m_pRunningScene->release();
    }
    m_pRunningScene = m_pNextScene;
	m_pNextScene->retain();
	m_pNextScene = NULL;

	if (! (runningSceneType & ccTransitionScene) && m_pRunningScene)
	{
		m_pRunningScene->onEnter();
		m_pRunningScene->onEnterTransitionDidFinish();
	}
}

void CCDirector::pause(void)
{
	if (m_bPaused)
	{
		return;
	}

	m_dOldAnimationInterval = m_dAnimationInterval;

	// when paused, don't consume CPU
	setAnimationInterval(1 / 4.0);
	m_bPaused = true;
}

void CCDirector::resume(void)
{
	if (! m_bPaused)
	{
		return;
	}

	setAnimationInterval(m_dOldAnimationInterval);

	if (CCTime::gettimeofdayCocos2d(m_pLastUpdate, NULL) != 0)
	{
		CCLOG("cocos2d: Director: Error in gettimeofday");
	}

	m_bPaused = false;
	m_fDeltaTime = 0;
}

void CCDirector::startAnimation(void)
{
	CCLOG("cocos2d: Director#startAnimation. Overrride me");
	assert(0);
}

void CCDirector::stopAnimation(void)
{
	CCLOG("cocos2d: Director#stopAnimation. Overrride me");
	assert(0);
}

void CCDirector::mainLoop(void)
{
    CCLOG("cocos2d: Director#preMainLoop. Overrride me");
	assert(0);
}

#if CC_DIRECTOR_FAST_FPS
// display the FPS using a LabelAtlas
// updates the FPS every frame
void CCDirector::showFPS(void)
{
	sprintf(m_pszFPS, "%.1f", m_fFrameRate);
	m_pFPSLabel->setString(m_pszFPS);

    m_pFPSLabel->draw();
}
#endif // CC_DIRECTOR_FAST_FPS

void CCDirector::calculateFramerateDeltaTime(void)
{
	struct cc_timeval now;

	if (CCTime::gettimeofdayCocos2d(&now, NULL) != 0)
	{
		CCLOG("error in gettimeofday");
		m_fComputeFrameRateDeltaTime = 0;
		return;
	}

	m_fComputeFrameRateDeltaTime = (now.tv_sec - m_pLastComputeFrameRate->tv_sec) + (now.tv_usec - m_pLastComputeFrameRate->tv_usec) / 1000000.0f;
	m_fComputeFrameRateDeltaTime = MAX(0, m_fComputeFrameRateDeltaTime);

	*m_pLastComputeFrameRate = now;
}

void CCDirector::computeFrameRate()
{
	static bool bInvoked = true;

	// compute delta time
	calculateFramerateDeltaTime();

	// only add frames if the director really draw the scene
	if (bInvoked)
	{
		m_nFrames++;
	}

	m_fAccumDt += m_fComputeFrameRateDeltaTime;

	if (m_fAccumDt > CC_DIRECTOR_FPS_INTERVAL)
	{
		m_fFrameRate = m_nFrames / m_fAccumDt;

		if (m_fFrameRate > m_fExpectedFrameRate)
		{
			bInvoked = false;
		}
		else
		{
			m_nFrames = 0;
			m_fAccumDt = 0;
			bInvoked = true;
		}
	}
}


void CCDirector::showProfilers()
{
#if CC_ENABLE_PROFILERS
	m_fAccumDtForProfiler += m_fDeltaTime;
	if (m_fAccumDtForProfiler > 1.0f)
	{
		m_fAccumDtForProfiler = 0;
		CCProfiler::sharedProfiler()->displayTimers();
	}
#endif
}

/***************************************************
* mobile platforms specific functions
**************************************************/

// is the view currently attached
bool CCDirector::isOpenGLAttached(void)
{
	return m_pobOpenGLView->isOpenGLReady();
}

void CCDirector::updateContentScaleFactor()
{
	// [openGLView responseToSelector:@selector(setContentScaleFactor)]
	if (m_pobOpenGLView->canSetContentScaleFactor())
	{
		m_pobOpenGLView->setContentScaleFactor(m_fContentScaleFactor);
		m_bIsContentScaleSupported = true;
	}
	else
	{
		CCLOG("cocos2d: setContentScaleFactor:'is not supported on this device");
	}
}

// detach or attach to a view or a window
bool CCDirector::detach(void)
{
	assert(isOpenGLAttached());

	CCX_SAFE_DELETE(m_pobOpenGLView);
	return true;
}

void CCDirector::setDepthBufferFormat(tDepthBufferFormat kDepthBufferFormat)
{
	assert(! isOpenGLAttached());
	m_eDepthBufferFormat = kDepthBufferFormat;
}

void CCDirector::setPixelFormat(tPixelFormat kPixelFormat)
{
	m_ePixelFormat = kPixelFormat;
}

tPixelFormat CCDirector::getPiexFormat(void)
{
	return m_ePixelFormat;
}

bool CCDirector::setDirectorType(ccDirectorType obDirectorType)
{
	// we only support CCDisplayLinkDirector
	CCDirector::sharedDirector();

	return true;
}

bool CCDirector::enableRetinaDisplay(bool enabled)
{
	// Already enabled?
	if (enabled && m_fContentScaleFactor == 2)
	{
		return true;
	}

	// Already diabled?
	if (!enabled && m_fContentScaleFactor == 1)
	{
		return false;
	}

	// setContentScaleFactor is not supported
	if (! m_pobOpenGLView->canSetContentScaleFactor())
	{
		return false;
	}

	///@todo SD device iphone specific
// 	if ([[UIScreen mainScreen] scale] == 1.0)
// 		return NO;

	float newScale = enabled ? 2 : 1;
	setContentScaleFactor(newScale);
	return true;
}

CGFloat CCDirector::getContentScaleFactor(void)
{
	return m_fContentScaleFactor;
}

void CCDirector::setContentScaleFactor(CGFloat scaleFactor)
{
	if (scaleFactor != m_fContentScaleFactor)
	{
		m_fContentScaleFactor = scaleFactor;
		m_obWinSizeInPixels = CGSizeMake(m_obWinSizeInPoints.width * scaleFactor, m_obWinSizeInPoints.height * scaleFactor);

		if (m_pobOpenGLView)
		{
			updateContentScaleFactor();
		}

		// update projection
		setProjection(m_eProjection);
	}
}

void CCDirector::applyOrientation(void)
{
	CGSize s = m_obWinSizeInPixels;
	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 (m_eDeviceOrientation)
	{
	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;
	}
}

ccDeviceOrientation CCDirector::getDeviceOrientation(void)
{
	return m_eDeviceOrientation;
}

void CCDirector::setDeviceOrientation(ccDeviceOrientation kDeviceOrientation)
{
	ccDeviceOrientation eNewOrientation;
	eNewOrientation = CCXApplication::sharedApplication()->setDeviceOrientation(kDeviceOrientation);
	if (m_eDeviceOrientation != eNewOrientation)
	{
		m_eDeviceOrientation = kDeviceOrientation;
	}
}

/***************************************************
* PC platforms specific functions, such as mac
**************************************************/

CGPoint CCDirector::convertEventToGL(NSEvent *event);
{
    assert(false);
	return CGPointZero;
}

bool CCDirector::isFullScreen(void)
{
    assert(false);
	return false;
}

void CCDirector::setResizeMode(int resizeMode)
{
    assert(false);
}

int CCDirector::getResizeMode(void);
{
    assert(false);
	return -1;
}

void CCDirector::setFullScreen(bool fullscreen)
{
    assert(false);
}

CGPoint CCDirector::convertToLogicalCoordinates(CGPoint coordinates)
{
    assert(false);
}


/***************************************************
* implementation of DisplayLinkDirector
**************************************************/

// should we afford 4 types of director ??
// I think DisplayLinkDirector is enough
// so we now only support DisplayLinkDirector
void CCDisplayLinkDirector::startAnimation(void)
{
	if (CCTime::gettimeofdayCocos2d(m_pLastUpdate, NULL) != 0)
	{
		CCLOG("cocos2d: DisplayLinkDirector: Error on gettimeofday");
	}

	m_bInvalid = false;
}

void CCDisplayLinkDirector::mainLoop(void)
{
 	if (! m_bInvalid)
 	{
		// compute frame rate
		computeFrameRate();

		// control frame rate
		if (m_fFrameRate <= m_fExpectedFrameRate)
		{
 			drawScene();
	 
 			// release the objects
 			NSPoolManager::getInstance()->pop();
		}		
 	}
}

void CCDisplayLinkDirector::stopAnimation(void)
{
	m_bInvalid = true;
}

void CCDisplayLinkDirector::setAnimationInterval(double dValue)
{
	m_dAnimationInterval = dValue;
	m_fExpectedFrameRate = (ccTime)(1 / m_dAnimationInterval);
	if (! m_bInvalid)
	{
		stopAnimation();
		startAnimation();
	}	
}

} //namespace   cocos2d