axmol/cocos2dx/sprite_nodes/CCSprite.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
of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE.
****************************************************************************/

#include "CCSpriteSheet.h"
#include "ccConfig.h"
#include "CCSprite.h"
#include "CCSpriteFrame.h"
#include "CCSpriteFrameCache.h"
#include "CCTextureCache.h"
#include "CGPointExtension.h"
#include "CCDrawingPrimitives.h"
#include "CGGeometry.h"
#include "CCTexture2D.h"
#include "CGAffineTransform.h"

#include <string.h>

using namespace std;
namespace   cocos2d {

#if CC_SPRITESHEET_RENDER_SUBPIXEL
#define RENDER_IN_SUBPIXEL
#else
#define RENDER_IN_SUBPIXEL(__A__) ( (int)(__A__))
#endif

// XXX: Optmization
struct transformValues_ {
	CGPoint pos;		// position x and y
	CGPoint	scale;		// scale x and y
	float	rotation;
	CGPoint ap;			// anchor point in pixels
};

CCSprite* CCSprite::spriteWithTexture(CCTexture2D *pTexture)
{
	CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithTexture(pTexture);
	pobSprite->autorelease();

	return pobSprite;
}

CCSprite* CCSprite::spriteWithTexture(CCTexture2D *pTexture, CGRect rect)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithTexture(pTexture, rect);
	pobSprite->autorelease();

	return pobSprite;
}

CCSprite* CCSprite::spriteWithTexture(CCTexture2D *pTexture, CGRect rect, CGPoint offset)
{
	// not implement
	assert(0);
	return NULL;
}

CCSprite* CCSprite::spriteWithFile(const char *pszFileName)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithFile(pszFileName);
	pobSprite->autorelease();

	return pobSprite;
}

CCSprite* CCSprite::spriteWithFile(const char *pszFileName, CGRect rect)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithFile(pszFileName, rect);
	pobSprite->autorelease();

	return pobSprite;
}

CCSprite* CCSprite::spriteWithSpriteFrame(CCSpriteFrame *pSpriteFrame)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithSpriteFrame(pSpriteFrame);
	pobSprite->autorelease();

	return pobSprite;
}

CCSprite* CCSprite::spriteWithSpriteFrameName(const char *pszSpriteFrameName)
{
	CCSpriteFrame *pFrame = CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByName(pszSpriteFrameName);
	return spriteWithSpriteFrame(pFrame);
}


// XXX: deprecated
/*
CCSprite* CCSprite::spriteWithCGImage(CGImageRef pImage)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithCGImage(pImage);
	pobSprite->autorelease();

	return pobSprite;
}
*/

/*
CCSprite* CCSprite::spriteWithCGImage(CGImageRef pImage, const char *pszKey)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithCGImage(pImage, pszKey);
	pobSprite->autorelease();

	return pobSprite;
}
*/

CCSprite* CCSprite::spriteWithSpriteSheet(CCSpriteSheet *pSpriteSheet, CGRect rect)
{
    CCSprite *pobSprite = new CCSprite();
	pobSprite->initWithSpriteSheet(pSpriteSheet, rect);
	pobSprite->autorelease();

	return pobSprite;
}

bool CCSprite::init(void)
{
	m_bDirty = m_bRecursiveDirty = false;

	// by default use "Self Render".
	// if the sprite is added to an SpriteSheet, then it will automatically switch to "SpriteSheet Render"
    useSelfRender();

	m_bOpacityModifyRGB = true;
	m_nOpacity = 255;
	m_sColor = m_sColorUnmodified = ccWHITE;

	m_sBlendFunc.src = CC_BLEND_SRC;
	m_sBlendFunc.dst = CC_BLEND_DST;

	// update texture (calls updateBlendFunc)
	setTexture(NULL);

	// clean the Quad
	memset(&m_sQuad, 0, sizeof(m_sQuad));

	m_bFlipX = m_bFlipY = false;

	// lazy alloc
	m_pAnimations = NULL;

	// default transform anchor: center
	m_tAnchorPoint = ccp(0.5f, 0.5f);

	// zwoptex default values
    m_obOffsetPosition = CGPointZero;

	m_eHonorParentTransform = CC_HONOR_PARENT_TRANSFORM_ALL;
	m_bHasChildren = false;

	// Atlas: Color
	ccColor4B tmpColor = { 255, 255, 255, 255 };
	m_sQuad.bl.colors = tmpColor;
	m_sQuad.br.colors = tmpColor;
	m_sQuad.tl.colors = tmpColor;
	m_sQuad.tr.colors = tmpColor;

	// Atlas: Vertex
		
	// updated in "useSelfRender"
		
	// Atlas: TexCoords
	setTextureRect(CGRectZero);

	return true;
}

bool CCSprite::initWithTexture(CCTexture2D *pTexture, CGRect rect)
{
	assert(pTexture != NULL);
	// IMPORTANT: [self init] and not [super init];
	init();
	setTexture(pTexture);
	setTextureRect(rect);

	return true;
}

bool CCSprite::initWithTexture(CCTexture2D *pTexture)
{
	assert(pTexture != NULL);

	CGRect rect = CGRectZero;
	rect.size = pTexture->getContentSize();
	
	return initWithTexture(pTexture, rect);
}

bool CCSprite::initWithFile(const char *pszFilename)
{
	assert(pszFilename != NULL);

	CCTexture2D *pTexture = CCTextureCache::sharedTextureCache()->addImage(pszFilename);
	if (pTexture)
	{
		CGRect rect = CGRectZero;
		rect.size = pTexture->getContentSize();
		return initWithTexture(pTexture, rect);
	}

	// don't release here.
	// when load texture failed, it's better to get a "transparent" sprite then a crashed program
	// this->release(); 
	return false;
}

bool CCSprite::initWithFile(const char *pszFilename, CGRect rect)
{
	assert(pszFilename != NULL);

	CCTexture2D *pTexture = CCTextureCache::sharedTextureCache()->addImage(pszFilename);
	if (pTexture)
	{
		return initWithTexture(pTexture, rect);
	}

	// don't release here.
	// when load texture failed, it's better to get a "transparent" sprite then a crashed program
	// this->release(); 
	return false;
}

bool CCSprite::initWithSpriteFrame(CCSpriteFrame *pSpriteFrame)
{
	assert(pSpriteFrame != NULL);

	bool bRet = initWithTexture(pSpriteFrame->getTexture(), pSpriteFrame->getRect());
	setDisplayFrame(pSpriteFrame);

	return bRet;
}

bool CCSprite::initWithSpriteFrameName(const char *pszSpriteFrameName)
{
	assert(pszSpriteFrameName != NULL);

	CCSpriteFrame *pFrame = CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByName(pszSpriteFrameName);
	return initWithSpriteFrame(pFrame);
}

// XXX: deprecated
/*
CCSprite* CCSprite::initWithCGImage(CGImageRef pImage)
{
	// todo
	// because it is deprecated, so we do not impelment it

	return NULL;
}
*/

/*
CCSprite* CCSprite::initWithCGImage(CGImageRef pImage, const char *pszKey)
{
	assert(pImage != NULL);

	// XXX: possible bug. See issue #349. New API should be added
	CCTexture2D *pTexture = CCTextureCache::sharedTextureCache()->addCGImage(pImage, pszKey);

	CGSize size = pTexture->getContentSize();
	CGRect rect = CGRectMake(0 ,0, size.width, size.height);

	return initWithTexture(texture, rect);
}
*/

bool CCSprite::initWithSpriteSheet(CCSpriteSheet *pSpriteSheet, CGRect rect)
{
	assert(pSpriteSheet != NULL);
	bool bRet = initWithTexture(pSpriteSheet->getTexture(), rect);
	useSpriteSheetRender(pSpriteSheet);

	return bRet;
}

CCSprite::CCSprite()
: m_pobTexture(NULL)
{
    init();
}

CCSprite::~CCSprite(void)
{
	CCX_SAFE_RELEASE(m_pobTexture);
	CCX_SAFE_RELEASE(m_pAnimations);
}

void CCSprite::useSelfRender(void)
{
    m_uAtlasIndex = CCSpriteIndexNotInitialized;
	m_bUsesSpriteSheet = false;
	m_pobTextureAtlas = NULL;
    m_pobSpriteSheet = NULL;
	m_bDirty = m_bRecursiveDirty = false;

	float x1 = 0 + m_obOffsetPosition.x;
	float y1 = 0 + m_obOffsetPosition.y;
	float x2 = x1 + m_obRect.size.width;
	float y2 = y1 + m_obRect.size.height;
	m_sQuad.bl.vertices = vertex3(x1, y1, 0);
	m_sQuad.br.vertices = vertex3(x2, y1, 0);
	m_sQuad.tl.vertices = vertex3(x1, y2, 0);
	m_sQuad.tr.vertices = vertex3(x2, y2, 0);
}

void CCSprite::useSpriteSheetRender(CCSpriteSheet *pSpriteSheet)
{
	m_bUsesSpriteSheet = true;
	m_pobTextureAtlas = pSpriteSheet->getTextureAtlas();
	m_pobSpriteSheet = pSpriteSheet;
}

void CCSprite::initAnimationDictionary(void)
{
	m_pAnimations = new NSMutableDictionary<string, CCAnimation*>();
}

void CCSprite::setTextureRect(CGRect rect)
{
	setTextureRect(rect, rect.size);
}

void CCSprite::setTextureRect(CGRect rect, CGSize size)
{
	m_obRect = rect;

	setContentSize(size);
	updateTextureCoords(rect);

	CGPoint relativeOffset = m_obUnflippedOffsetPositionFromCenter;

	// issue #732
	if (m_bFlipX)
	{
		relativeOffset.x = -relativeOffset.x;
	}
	if (m_bFlipY)
	{
		relativeOffset.y = -relativeOffset.y;
	}

	m_obOffsetPosition.x = relativeOffset.x + (m_tContentSize.width - m_obRect.size.width) / 2;
	m_obOffsetPosition.y = relativeOffset.y + (m_tContentSize.height - m_obRect.size.height) / 2;

	// rendering using SpriteSheet
	if (m_bUsesSpriteSheet)
	{
		// update dirty_, don't update recursiveDirty_
		m_bDirty = true;
	}
	else
	{
		// self rendering
		
		// Atlas: Vertex
		float x1 = 0 + m_obOffsetPosition.x;
		float y1 = 0 + m_obOffsetPosition.y;
		float x2 = x1 + m_obRect.size.width;
		float y2 = y1 + m_obRect.size.height;

		// Don't update Z.
		m_sQuad.bl.vertices = vertex3(x1, y1, 0);
		m_sQuad.br.vertices = vertex3(x2, y1, 0);
		m_sQuad.tl.vertices = vertex3(x1, y2, 0);
		m_sQuad.tr.vertices = vertex3(x2, y2, 0);
	}
}

void CCSprite::updateTextureCoords(CGRect rect)
{
	if (m_pobTexture)
	{
		float atlasWidth = (float)m_pobTexture->getPixelsWide();
		float atlasHeight = (float)m_pobTexture->getPixelsHigh();

		float left = m_obRect.origin.x / atlasWidth;
		float right = (m_obRect.origin.x + m_obRect.size.width) / atlasWidth;
		float top = m_obRect.origin.y / atlasHeight;
		float bottom = (m_obRect.origin.y + m_obRect.size.height) / atlasHeight;

		if (m_bFlipX)
		{
			float tmp = left;
			left = right;
			right = tmp;
		}

		if (m_bFlipY)
		{
			float tmp = top;
			top = bottom;
			bottom = tmp;
		}

		m_sQuad.bl.texCoords.u = left;
		m_sQuad.bl.texCoords.v = bottom;
		m_sQuad.br.texCoords.u = right;
		m_sQuad.br.texCoords.v = bottom;
		m_sQuad.tl.texCoords.u = left;
		m_sQuad.tl.texCoords.v = top;
		m_sQuad.tr.texCoords.u = right;
		m_sQuad.tr.texCoords.v = top;
	}
}

void CCSprite::updateTransform(void)
{
	assert(m_bUsesSpriteSheet);

	CGAffineTransform matrix;

	// Optimization: if it is not visible, then do nothing
	if (! m_bIsVisible)
	{
		m_sQuad.br.vertices = m_sQuad.tl.vertices = m_sQuad.tr.vertices = m_sQuad.bl.vertices = vertex3(0,0,0);
		m_pobTextureAtlas->updateQuad(&m_sQuad, m_uAtlasIndex);
		m_bDirty = m_bRecursiveDirty = false;
		return;
	}

	// Optimization: If parent is spritesheet, or parent is nil
	// build Affine transform manually
	if (! m_pParent || m_pParent == m_pobSpriteSheet)
	{
		float radians = -CC_DEGREES_TO_RADIANS(m_fRotation);
		float c = cosf(radians);
		float s = sinf(radians);

        matrix = CGAffineTransformMake(c * m_fScaleX, s * m_fScaleX,
			-s * m_fScaleY, c * m_fScaleY,
			m_tPosition.x, m_tPosition.y);
		matrix = CGAffineTransformTranslate(matrix, -m_tAnchorPointInPixels.x, -m_tAnchorPointInPixels.y);
	} else
	if (m_pParent != m_pobSpriteSheet)
	{
		// else do affine transformation according to the HonorParentTransform
		matrix = CGAffineTransformIdentity;
		ccHonorParentTransform prevHonor = CC_HONOR_PARENT_TRANSFORM_ALL;

		for (CCNode *p = this; p && p != m_pobSpriteSheet; p = p->getParent())
		{
			struct transformValues_ tv = ((CCSprite*)p)->getTransformValues();

			CGAffineTransform newMatrix = CGAffineTransformIdentity;

			// 2nd: Translate, Rotate, Scale
			if( prevHonor & CC_HONOR_PARENT_TRANSFORM_TRANSLATE )
			{
				newMatrix = CGAffineTransformTranslate(newMatrix, tv.pos.x, tv.pos.y);
			}

			if( prevHonor & CC_HONOR_PARENT_TRANSFORM_ROTATE )
			{
				newMatrix = CGAffineTransformRotate(newMatrix, -CC_DEGREES_TO_RADIANS(tv.rotation));
			}

			if( prevHonor & CC_HONOR_PARENT_TRANSFORM_SCALE ) 
			{
				newMatrix = CGAffineTransformScale(newMatrix, tv.scale.x, tv.scale.y);
			}

			// 3rd: Translate anchor point
			newMatrix = CGAffineTransformTranslate(newMatrix, -tv.ap.x, -tv.ap.y);

			// 4th: Matrix multiplication
			matrix = CGAffineTransformConcat( matrix, newMatrix);

			prevHonor = ((CCSprite*)p)->getHornorParentTransform();
		}
	}

	//
	// calculate the Quad based on the Affine Matrix
	//
	CGSize size = m_obRect.size;

	float x1 = m_obOffsetPosition.x;
	float y1 = m_obOffsetPosition.y;

	float x2 = x1 + size.width;
	float y2 = y1 + size.height;
    float x = matrix.tx;
	float y = matrix.ty;
	
	float cr = matrix.a;
	float sr = matrix.b;
	float cr2 = matrix.d;
	float sr2 = -matrix.c;
	float ax = x1 * cr - y1 * sr2 + x;
	float ay = x1 * sr + y1 * cr2 + y;
	
	float bx = x2 * cr - y1 * sr2 + x;
	float by = x2 * sr + y1 * cr2 + y;
	
	float cx = x2 * cr - y2 * sr2 + x;
	float cy = x2 * sr + y2 * cr2 + y;
	
	float dx = x1 * cr - y2 * sr2 + x;
	float dy = x1 * sr + y2 * cr2 + y;

	m_sQuad.bl.vertices = vertex3(RENDER_IN_SUBPIXEL(ax), RENDER_IN_SUBPIXEL(ay), m_fVertexZ);
	m_sQuad.br.vertices = vertex3(RENDER_IN_SUBPIXEL(bx), RENDER_IN_SUBPIXEL(by), m_fVertexZ);
	m_sQuad.tl.vertices = vertex3(RENDER_IN_SUBPIXEL(dx), RENDER_IN_SUBPIXEL(dy), m_fVertexZ);
	m_sQuad.tr.vertices = vertex3(RENDER_IN_SUBPIXEL(cx), RENDER_IN_SUBPIXEL(cy), m_fVertexZ);

	m_pobTextureAtlas->updateQuad(&m_sQuad, m_uAtlasIndex);
	m_bDirty = m_bRecursiveDirty = false;
}

// XXX: Optimization: instead of calling 5 times the parent sprite to obtain: position, scale.x, scale.y, anchorpoint and rotation,
// this fuction return the 5 values in 1 single call
struct transformValues_ CCSprite::getTransformValues(void)
{
	struct transformValues_ tv;
	tv.pos = m_tPosition;
	tv.scale.x = m_fScaleX;
	tv.scale.y = m_fScaleY;
	tv.rotation = m_fRotation;
	tv.ap = m_tAnchorPointInPixels;

	return tv;
}

// draw

void CCSprite::draw(void)
{
	assert(! m_bUsesSpriteSheet);

	// 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_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
	// Unneeded states: -
	bool newBlend = false;
	if (m_sBlendFunc.src != CC_BLEND_SRC || m_sBlendFunc.dst != CC_BLEND_DST)
	{
		newBlend = true;
		glBlendFunc(m_sBlendFunc.src, m_sBlendFunc.dst);
	}

#define kQuadSize sizeof(m_sQuad.bl)
    if (m_pobTexture)
    {
        glBindTexture(GL_TEXTURE_2D, m_pobTexture->getName());
    }
    else
    {
        glBindTexture(GL_TEXTURE_2D, 0);
    }

	int offset = (int)&m_sQuad;

	// vertex
	int diff = offsetof(ccV3F_C4B_T2F, vertices);
	glVertexPointer(3, GL_FLOAT, kQuadSize, (void*)(offset + diff));

	// color
	diff = offsetof( ccV3F_C4B_T2F, colors);
	glColorPointer(4, GL_UNSIGNED_BYTE, kQuadSize, (void*)(offset + diff));
	
	// tex coords
	diff = offsetof( ccV3F_C4B_T2F, texCoords);
	glTexCoordPointer(2, GL_FLOAT, kQuadSize, (void*)(offset + diff));
	
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
	
	if( newBlend )
	{
		glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
	}

#if CC_SPRITE_DEBUG_DRAW
	CGSize s = m_tContentSize;
	CGSize s = [self contentSize];
	CGPoint vertices[4]={
		ccp(0,0),ccp(s.width,0),
		ccp(s.width,s.height),ccp(0,s.height),
	};
	ccDrawPoly(vertices, 4, ture);
#endif // CC_SPRITE_DEBUG_DRAW
}

// CCNode overrides

CCNode* CCSprite::addChild(CCNode* pChild)
{
	return CCNode::addChild(pChild);
}

CCNode* CCSprite::addChild(CCNode *pChild, int zOrder)
{
	return CCNode::addChild(pChild, zOrder);
}

CCNode* CCSprite::addChild(CCNode *pChild, int zOrder, int tag)
{
	assert(pChild != NULL);
	CCNode* pRet = CCNode::addChild(pChild, zOrder, tag);

	if (m_bUsesSpriteSheet)
	{
		unsigned int index = m_pobSpriteSheet->atlasIndexForChild((CCSprite*)(pChild), zOrder);
		m_pobSpriteSheet->insertChild((CCSprite*)(pChild), index);
	}

	m_bHasChildren = true;

	return pRet;
}

void CCSprite::reorderChild(CCNode *pChild, int zOrder)
{
    assert(pChild != NULL);
	assert(m_pChildren->containsObject(pChild));

	if (zOrder == pChild->getZOrder())
	{
		return;
	}

	if (m_bUsesSpriteSheet)
	{
		// XXX: Instead of removing/adding, it is more efficient to reorder manually
		pChild->retain();
		removeChild(pChild, false);
		addChild(pChild, zOrder);
		pChild->release();
	}
	else
	{
		CCNode::reorderChild(pChild, zOrder);
	}
}

void CCSprite::removeChild(CCNode *pChild, bool bCleanup)
{
	if (m_bUsesSpriteSheet)
	{
		m_pobSpriteSheet->removeSpriteFromAtlas((CCSprite*)(pChild));
	}

	CCNode::removeChild(pChild, bCleanup);
	
}

void CCSprite::removeAllChildrenWithCleanup(bool bCleanup)
{
	if (m_bUsesSpriteSheet)
	{
		CCSprite *pChild;
		NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
		for (iter = m_pChildren->begin(); iter != m_pChildren->end(); ++iter)
		{
			pChild = (CCSprite*)(*iter);
            CCX_BREAK_IF(! pChild);
			m_pobSpriteSheet->removeSpriteFromAtlas(pChild);
		}
	}

	CCNode::removeAllChildrenWithCleanup(bCleanup);
	
	m_bHasChildren = false;
}

//
// CCNode property overloads
// used only when parent is CCSpriteSheet
//

void CCSprite::setDirtyRecursively(bool bValue)
{
	m_bDirty = m_bRecursiveDirty = bValue;
	// recursively set dirty
	if (m_bHasChildren)
	{
		CCSprite *pChild;
		NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
		for (iter = m_pChildren->begin(); iter != m_pChildren->end(); ++iter)
		{
			pChild = (CCSprite*)(*iter);
            CCX_BREAK_IF(! pChild);
			pChild->setDirtyRecursively(true);
		}
	}
}

// XXX HACK: optimization
#define SET_DIRTY_RECURSIVELY() {									\
					if (m_bUsesSpriteSheet && ! m_bRecursiveDirty) {	\
						m_bDirty = m_bRecursiveDirty = true;				\
						if ( m_bHasChildren)							\
							setDirtyRecursively(true);			\
						}											\
					}

void CCSprite::setPosition(CGPoint pos)
{
	CCNode::setPosition(pos);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setRotation(float fRotation)
{
	CCNode::setRotation(fRotation);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setScaleX(float fScaleX)
{
	CCNode::setScaleX(fScaleX);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setScaleY(float fScaleY)
{
	CCNode::setScaleY(fScaleY);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setScale(float fScale)
{
	CCNode::setScale(fScale);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setVertexZ(float fVertexZ)
{
	CCNode::setVertexZ(fVertexZ);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setAnchorPoint(CGPoint anchor)
{
	CCNode::setAnchorPoint(anchor);
	SET_DIRTY_RECURSIVELY();
}

void CCSprite::setIsRelativeAnchorPoint(bool bRelative)
{
	assert(! m_bUsesSpriteSheet);
	CCNode::setIsRelativeAnchorPoint(bRelative);
}

void CCSprite::setIsVisible(bool bVisible)
{
	if (bVisible != m_bIsVisible)
	{
		CCNode::setIsVisible(bVisible);
		if (m_bUsesSpriteSheet && m_bRecursiveDirty)
		{
			m_bDirty = m_bRecursiveDirty = true;
			CCNode *pChild;
			NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
            if (m_pChildren && m_pChildren->count() != 0)
            {
                for (iter = m_pChildren->begin(); iter != m_pChildren->end(); ++iter)
                {
                    pChild = *iter;

                    CCX_BREAK_IF(! pChild);
                    pChild->setIsVisible(bVisible);
                }
            }
		}
	}
}

void CCSprite::setFlipX(bool bFlipX)
{
	if (m_bFlipX != bFlipX)
	{
		m_bFlipX = bFlipX;
		setTextureRect(m_obRect);
	}
}

bool CCSprite::isFlipX(void)
{
	return m_bFlipX;
}

void CCSprite::setFlipY(bool bFlipY)
{
	if (m_bFlipY != bFlipY)
	{
		m_bFlipY = bFlipY;
		setTextureRect(m_obRect);
	}
}

bool CCSprite::isFlipY(void)
{
	return m_bFlipY;
}

//
// RGBA protocol
//

void CCSprite::updateColor(void)
{
	ccColor4B color4 = { m_sColor.r, m_sColor.g, m_sColor.b, m_nOpacity };

	m_sQuad.bl.colors = color4;
	m_sQuad.br.colors = color4;
	m_sQuad.tl.colors = color4;
	m_sQuad.tr.colors = color4;

	// renders using Sprite Manager
	if (m_bUsesSpriteSheet)
	{
		if (m_uAtlasIndex != CCSpriteIndexNotInitialized)
		{
			m_pobTextureAtlas->updateQuad(&m_sQuad, m_uAtlasIndex);
		}
		else
		{
			// no need to set it recursively
			// update dirty_, don't update recursiveDirty_
			m_bDirty = true;
		}
	}

	// self render
	// do nothing
}

GLubyte CCSprite::getOpacity(void)
{
	return m_nOpacity;
}

void CCSprite::setOpacity(GLubyte opacity)
{
	m_nOpacity = opacity;

	// special opacity for premultiplied textures
	if (m_bOpacityModifyRGB)
	{
		setColor(m_sColorUnmodified);
	}

	updateColor();
}

ccColor3B CCSprite::getColor(void)
{
	if (m_bOpacityModifyRGB)
	{
		return m_sColorUnmodified;
	}

	return m_sColor;
}

void CCSprite::setColor(ccColor3B color3)
{
    m_sColor = m_sColorUnmodified = color3;

	if (m_bOpacityModifyRGB)
	{
		m_sColor.r = color3.r * m_nOpacity/255;
		m_sColor.g = color3.g * m_nOpacity/255;
		m_sColor.b = color3.b * m_nOpacity/255;
	}

	updateColor();
}

void CCSprite::setIsOpacityModifyRGB(bool bValue)
{
	ccColor3B oldColor = m_sColor;
	m_bOpacityModifyRGB = bValue;
	m_sColor = oldColor;
}

bool CCSprite::getIsOpacityModifyRGB(void)
{
	return m_bOpacityModifyRGB;
}

// CCFrameProtocol protocol

void CCSprite::setDisplayFrame(CCSpriteFrame *pNewFrame)
{
	m_obUnflippedOffsetPositionFromCenter = pNewFrame->getOffset();

	CCTexture2D *pNewTexture = pNewFrame->getTexture();
	// update texture before updating texture rect
	if (pNewTexture->getName() != m_pobTexture->getName())
	{
        setTexture(pNewTexture);
	}

	// update rect
	setTextureRect(pNewFrame->getRect(), pNewFrame->getOriginalSize());
}

void CCSprite::setDisplayFrame(const char *pszAnimationName, int nFrameIndex)
{
	if (! m_pAnimations)
	{
		initAnimationDictionary();
	}

	CCAnimation *pAnimation = m_pAnimations->objectForKey(std::string(pszAnimationName));
	CCSpriteFrame *pFrame = pAnimation->getFrames()->getObjectAtIndex(nFrameIndex);

	assert(pFrame);

	setDisplayFrame(pFrame);
}

bool CCSprite::isFrameDisplayed(CCSpriteFrame *pFrame)
{
	CGRect r = pFrame->getRect();
	CGPoint p = pFrame->getOffset();
	return (CGRect::CGRectEqualToRect(r, m_obRect) &&
		pFrame->getTexture()->getName() == m_pobTexture->getName() &&
		CGPoint::CGPointEqualToPoint(p, m_obOffsetPosition));
}

CCSpriteFrame* CCSprite::displayedFrame(void)
{
	return CCSpriteFrame::frameWithTexture(m_pobTexture, m_obRect, CGPointZero);
}

void CCSprite::addAnimation(CCAnimation *pAnimation)
{
	// lazy alloc
	if (! m_pAnimations)
	{
		initAnimationDictionary();
	}

	m_pAnimations->setObject(pAnimation, pAnimation->getName());
}

CCAnimation* CCSprite::animationByName(const char *pszAnimationName)
{
	assert(pszAnimationName != NULL);

	return m_pAnimations->objectForKey(std::string(pszAnimationName));
}

// Texture protocol

void CCSprite::updateBlendFunc(void)
{
	// CCSprite: updateBlendFunc doesn't work when the sprite is rendered using a CCSpriteSheet
	assert (! m_bUsesSpriteSheet);

	// it's possible to have an untextured sprite
	if (! m_pobTexture || ! m_pobTexture->getHasPremultipliedAlpha())
	{
		m_sBlendFunc.src = GL_SRC_ALPHA;
		m_sBlendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
		setIsOpacityModifyRGB(false);
	}
	else
	{
		m_sBlendFunc.src = CC_BLEND_SRC;
		m_sBlendFunc.dst = CC_BLEND_DST;
		setIsOpacityModifyRGB(true);
	}
}

void CCSprite::setTexture(CCTexture2D *texture)
{
	// CCSprite: setTexture doesn't work when the sprite is rendered using a CCSpriteSheet
	assert(! m_bUsesSpriteSheet);

	// we can not use RTTI, so we do not known the type of object
	// accept texture==nil as argument
	/*assert((! texture) || dynamic_cast<CCTexture2D*>(texture));*/

	CCX_SAFE_RELEASE(m_pobTexture);

	m_pobTexture = texture;
	if (texture)
	{
	    texture->retain();
	}

	updateBlendFunc();
}

CCTexture2D* CCSprite::getTexture(void)
{
	return m_pobTexture;
}
}//namespace   cocos2d