axmol/cocos2dx/sprite_nodes/CCSpriteBatchNode.cpp

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

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#include "CCSpriteBatchNode.h"
#include "ccConfig.h"
#include "CCSprite.h"
#include "effects/CCGrid.h"
#include "CCDrawingPrimitives.h"
#include "CCTextureCache.h"
#include "CGPointExtension.h"

namespace cocos2d
{
	const int defaultCapacity = 29;

	/*
	* creation with CCTexture2D
	*/
	CCSpriteBatchNode* CCSpriteBatchNode::batchNodeWithTexture(cocos2d::CCTexture2D *tex)
	{
		CCSpriteBatchNode *batchNode = new CCSpriteBatchNode();
		batchNode->initWithTexture(tex, defaultCapacity);
		batchNode->autorelease();

		return batchNode;
	}

	CCSpriteBatchNode* CCSpriteBatchNode::spriteSheetWithTexture(cocos2d::CCTexture2D *tex)
	{
		return batchNodeWithTexture(tex);
	}

	CCSpriteBatchNode* CCSpriteBatchNode::batchNodeWithTexture(CCTexture2D* tex, unsigned int capacity)
	{
		CCSpriteBatchNode *batchNode = new CCSpriteBatchNode();
		batchNode->initWithTexture(tex, capacity);
		batchNode->autorelease();

		return batchNode;
	}

	CCSpriteBatchNode* CCSpriteBatchNode::spriteSheetWithTexture(CCTexture2D *tex, unsigned int capacity)
	{
		return batchNodeWithTexture(tex, capacity);
	}

	/*
	* creation with File Image
	*/
	CCSpriteBatchNode* CCSpriteBatchNode::batchNodeWithFile(const char *fileImage, unsigned int capacity)
	{
		CCSpriteBatchNode *batchNode = new CCSpriteBatchNode();
		batchNode->initWithFile(fileImage, capacity);
		batchNode->autorelease();

		return batchNode;
	}

	CCSpriteBatchNode* CCSpriteBatchNode::spriteSheetWithFile(const char *fileImage, unsigned int capacity)
	{
		return batchNodeWithFile(fileImage, capacity);
	}

	CCSpriteBatchNode* CCSpriteBatchNode::batchNodeWithFile(const char *fileImage)
	{
		CCSpriteBatchNode *batchNode = new CCSpriteBatchNode();
		batchNode->initWithFile(fileImage, defaultCapacity);
		batchNode->autorelease();

		return batchNode;
	}

	CCSpriteBatchNode* CCSpriteBatchNode::spriteSheetWithFile(const char *fileImage)
	{
		return batchNodeWithFile(fileImage);
	}

	/*
	* init with CCTexture2D
	*/
	bool CCSpriteBatchNode::initWithTexture(cocos2d::CCTexture2D *tex, unsigned int capacity)
	{
		m_blendFunc.src = CC_BLEND_SRC;
		m_blendFunc.dst = CC_BLEND_DST;
		m_pobTextureAtlas = new CCTextureAtlas();
		m_pobTextureAtlas->initWithTexture(tex, capacity);

		updateBlendFunc();

		// no lazy alloc in this node
		m_pChildren = new NSMutableArray<CCNode*>();
		m_pobDescendants = new NSMutableArray<CCSprite*>();

		return true;
	}

	/*
	* init with FileImage
	*/
	bool CCSpriteBatchNode::initWithFile(const char* fileImage, unsigned int capacity)
	{
		CCTexture2D *pTexture2D = CCTextureCache::sharedTextureCache()->addImage(fileImage);
		return initWithTexture(pTexture2D, capacity);
	}

	CCSpriteBatchNode::~CCSpriteBatchNode()
	{
		m_pobTextureAtlas->release();
		m_pobDescendants->release();
	}

	// override visit
	// don't call visit on it's children
	void CCSpriteBatchNode::visit(void)
	{
		// CAREFUL:
		// This visit is almost identical to CocosNode#visit
		// with the exception that it doesn't call visit on it's children
		//
		// The alternative is to have a void CCSprite#visit, but
		// although this is less mantainable, is faster
		//
		if (! m_bIsVisible)
		{
			return;
		}

		glPushMatrix();

		if (m_pGrid && m_pGrid->isActive())
		{
			m_pGrid->beforeDraw();
			transformAncestors();
		}

		transform();

		draw();

		if (m_pGrid && m_pGrid->isActive())
		{
			m_pGrid->afterDraw(this);
		}

		glPopMatrix();
	}

	// xxx deprecated
	CCSprite* CCSpriteBatchNode::createSpriteWithRect(CGRect rect)
	{
		CCSprite *pSprite = CCSprite::spriteWithTexture(m_pobTextureAtlas->getTexture(), rect);
		pSprite->useBatchNode(this);

		return pSprite;
	}

	// XXX deprecated
	void CCSpriteBatchNode::initSprite(cocos2d::CCSprite *sprite, cocos2d::CGRect rect)
	{
		if (sprite)
		{
			sprite->initWithTexture(m_pobTextureAtlas->getTexture(), rect);
			sprite->useBatchNode(this);
		}		
	}

	void CCSpriteBatchNode::addChild(CCNode *child, int zOrder, int tag)
	{
		assert(child != NULL);

		CCSprite *pSprite = (CCSprite*)(child);
		// check CCSprite is using the same texture id
		assert(pSprite->getTexture()->getName() == m_pobTextureAtlas->getTexture()->getName());

		CCNode::addChild(child, zOrder, tag);

		unsigned int uIndex = atlasIndexForChild(pSprite, zOrder);
		insertChild(pSprite, uIndex);
	}

	void CCSpriteBatchNode::addChild(CCNode *child)
	{
		CCNode::addChild(child);
	}

	void CCSpriteBatchNode::addChild(CCNode *child, int zOrder)
	{
		CCNode::addChild(child, zOrder);
	}

	// override reorderChild
	void CCSpriteBatchNode::reorderChild(CCNode *child, int zOrder)
	{
		assert(child != NULL);
		assert(m_pChildren->containsObject(child));

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

		// xxx: instead of removing/adding, it is more efficient ot reorder manually
		child->retain();
		removeChild(child, false);
		addChild(child, zOrder);
		child->release();
	}

	// override remove child
	void CCSpriteBatchNode::removeChild(CCNode *child, bool cleanup)
	{
		CCSprite *pSprite = (CCSprite*)(child);

		// explicit null handling
		if (pSprite == NULL)
		{
			return;
		}

		assert(m_pChildren->containsObject(pSprite));

		// cleanup before removing
		removeSpriteFromAtlas(pSprite);

		CCNode::removeChild(pSprite, cleanup);
	}

	void CCSpriteBatchNode::removeChildAtIndex(unsigned int uIndex, bool bDoCleanup)
	{
		removeChild((CCSprite*)(m_pChildren->getObjectAtIndex(uIndex)), bDoCleanup);
	}

	void CCSpriteBatchNode::removeAllChildrenWithCleanup(bool bCleanup)
	{
		// Invalidate atlas index. issue #569
		if (m_pChildren && m_pChildren->count() > 0)
		{
			CCSprite *pSprite;
			NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
			for (iter = m_pChildren->begin(); iter != m_pChildren->end(); ++iter)
			{
				pSprite = (CCSprite*)(*iter);

				if (! pSprite)
				{
					break;
				}

				pSprite->useSelfRender();
			}
		}

		CCNode::removeAllChildrenWithCleanup(bCleanup);

		m_pobDescendants->removeAllObjects();
		m_pobTextureAtlas->removeAllQuads();
	}

	// draw
	void CCSpriteBatchNode::draw(void)
	{
		// Optimization: Fast Dispatch	
		if (m_pobTextureAtlas->getTotalQuads() == 0)
		{
			return;
		}

		if (m_pobDescendants && m_pobDescendants->count() > 0)
		{
			CCSprite *pSprite;
			NSMutableArray<CCSprite*>::NSMutableArrayIterator iter;
			for (iter = m_pobDescendants->begin(); iter != m_pobDescendants->end(); ++iter)
			{
				pSprite = *iter;

				if (! pSprite)
				{
					break;
				}

                // fast dispatch
				pSprite->updateTransform();


#if CC_SPRITESHEET_DEBUG_DRAW
				// issue #528
				CGRect rect = pSprite->boundingBox();
				CGPoint vertices[4]={
					ccp(rect.origin.x,rect.origin.y),
					ccp(rect.origin.x+rect.size.width,rect.origin.y),
					ccp(rect.origin.x+rect.size.width,rect.origin.y+rect.size.height),
					ccp(rect.origin.x,rect.origin.y+rect.size.height),
				};
				ccDrawPoly(vertices, 4, true);
#endif // CC_SPRITESHEET_DEBUG_DRAW
			}
		}

		// 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 = m_blendFunc.src != CC_BLEND_SRC || m_blendFunc.dst != CC_BLEND_DST;
		if (newBlend)
		{
			glBlendFunc(m_blendFunc.src, m_blendFunc.dst);
		}

		m_pobTextureAtlas->drawQuads();
		if (newBlend)
		{
			glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
		}
	}

	void CCSpriteBatchNode::increaseAtlasCapacity(void)
	{
		// if we're going beyond the current TextureAtlas's capacity,
		// all the previously initialized sprites will need to redo their texture coords
		// this is likely computationally expensive
		unsigned int quantity = (m_pobTextureAtlas->getCapacity() + 1) * 4 / 3;

		CCLOG("cocos2d: CCSpriteSheet: resizing TextureAtlas capacity from %u to %u.", 
			(unsigned int)m_pobTextureAtlas->getCapacity(), (unsigned int)quantity);

		if (! m_pobTextureAtlas->resizeCapacity(quantity))
		{
			// serious problems
			CCLOG("cocos2d: WARNING: Not enough memory to resize the atlas");
			assert(false);
		}
	}

	unsigned int CCSpriteBatchNode::rebuildIndexInOrder(CCSprite *pobParent, unsigned int uIndex)
	{
		NSMutableArray<CCNode*> *pChildren = pobParent->getChildren();

		if (pChildren && pChildren->count() > 0)
		{
			CCSprite *pSprite;
			NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
			for (iter = pChildren->begin(); iter != pChildren->end(); ++iter)
			{
				pSprite = (CCSprite*)(*iter);

				if (! pSprite)
				{
					break;
				}

				if (pSprite->getZOrder() < 0)
				{
					uIndex = rebuildIndexInOrder(pSprite, uIndex);
				}
			}
		}	

		// ignore self (batch node)
		if (! pobParent->isEqual(this))
		{
			pobParent->setAtlasIndex(uIndex);
			uIndex++;
		}

		if (pChildren && pChildren->count() > 0)
		{
			CCSprite *pSprite;
			NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
			for (iter = pChildren->begin(); iter != pChildren->end(); ++iter)
			{
				pSprite = (CCSprite*)(*iter);

				if (! pSprite)
				{
					break;
				}

				if (pSprite->getZOrder() >= 0)
				{
					uIndex = rebuildIndexInOrder(pSprite, uIndex);
				}
			}
		}

		return uIndex;
	}

	unsigned int CCSpriteBatchNode::highestAtlasIndexInChild(CCSprite *pSprite)
	{
		NSMutableArray<CCNode*> *pChildren = pSprite->getChildren();

		if (! pChildren || pChildren->count() == 0)
		{
			return pSprite->getAtlasIndex();
		}
		else
		{
			return highestAtlasIndexInChild((CCSprite*)(pChildren->getLastObject()));
		}
	}

	unsigned int CCSpriteBatchNode::lowestAtlasIndexInChild(CCSprite *pSprite)
	{
		NSMutableArray<CCNode*> *pChildren = pSprite->getChildren();

		if (! pChildren || pChildren->count() == 0)
		{
			return pSprite->getAtlasIndex();
		}
		else
		{
			return lowestAtlasIndexInChild((CCSprite*)(pChildren->getObjectAtIndex(0)));
		}
	}

	unsigned int CCSpriteBatchNode::atlasIndexForChild(CCSprite *pobSprite, int nZ)
	{
		NSMutableArray<CCNode*> *pBrothers = pobSprite->getParent()->getChildren();
		unsigned int uChildIndex = pBrothers->getIndexOfObject(pobSprite);

		// ignore parent Z if parent is spriteSheet
		bool bIgnoreParent = (CCSpriteBatchNode*)(pobSprite->getParent()) == this;
		CCSprite *pPrevious = NULL;
		if (uChildIndex > 0)
		{
			pPrevious = (CCSprite*)(pBrothers->getObjectAtIndex(uChildIndex - 1));
		}

		// first child of the sprite sheet
		if (bIgnoreParent)
		{
			if (uChildIndex == 0)
			{
				return 0;
			}

			return highestAtlasIndexInChild(pPrevious) + 1;
		}

		// parent is a CCSprite, so, it must be taken into account

		// first child of an CCSprite ?
		if (uChildIndex == 0)
		{
			CCSprite *p = (CCSprite*)(pobSprite->getParent());

			// less than parent and brothers
			if (nZ < 0)
			{
				return p->getAtlasIndex();
			}
			else
			{
				return p->getAtlasIndex() + 1;
			}
		}
		else
		{
			// previous & sprite belong to the same branch
			if ((pPrevious->getZOrder() < 0 && nZ < 0) || (pPrevious->getZOrder() >= 0 && nZ >= 0))
			{
				return highestAtlasIndexInChild(pPrevious) + 1;
			}

			// else (previous < 0 and sprite >= 0 )
			CCSprite *p = (CCSprite*)(pobSprite->getParent());
			return p->getAtlasIndex() + 1;
		}

		// Should not happen. Error calculating Z on SpriteSheet
		assert(0);
		return 0;
	}

	// add child helper

	void CCSpriteBatchNode::insertChild(CCSprite *pobSprite, unsigned int uIndex)
	{
		pobSprite->useBatchNode(this);
		pobSprite->setAtlasIndex(uIndex);
		pobSprite->setDirty(true);

		if (m_pobTextureAtlas->getTotalQuads() == m_pobTextureAtlas->getCapacity())
		{
			increaseAtlasCapacity();
		}

		ccV3F_C4B_T2F_Quad quad = pobSprite->getQuad();
		m_pobTextureAtlas->insertQuad(&quad, uIndex);

		m_pobDescendants->insertObjectAtIndex(pobSprite, uIndex);

		// update indices
		unsigned int i = 0;
		if (m_pobDescendants && m_pobDescendants->count() > 0)
		{
			NSMutableArray<CCSprite*>::NSMutableArrayIterator iter;
			for (iter = m_pobDescendants->begin(); iter != m_pobDescendants->end(); ++iter)
			{
				if (! *iter)
				{
					break;
				}

				if (i > uIndex)
				{
					(*iter)->setAtlasIndex((*iter)->getAtlasIndex() + 1);
				}

				++i;
			}
		}	

		// add children recursively
		NSMutableArray<CCNode*> *pChildren = pobSprite->getChildren();
		if (pChildren && pChildren->count() > 0)
		{
			NSMutableArray<CCNode*>::NSMutableArrayIterator iterNode;
			CCSprite *pSprite;
			for (iterNode = pChildren->begin(); iterNode != pChildren->end(); ++iterNode)
			{
				pSprite = (CCSprite*)(*iterNode);

				if (! pSprite)
				{
					break;
				}

				unsigned int uIndex = atlasIndexForChild(pSprite, pSprite->getZOrder());
				insertChild(pSprite, uIndex);
			}
		}
	}

	void CCSpriteBatchNode::removeSpriteFromAtlas(CCSprite *pobSprite)
	{
		// remove from TextureAtlas
		m_pobTextureAtlas->removeQuadAtIndex(pobSprite->getAtlasIndex());

		// Cleanup sprite. It might be reused (issue #569)
		pobSprite->useSelfRender();

		unsigned int uIndex = m_pobDescendants->getIndexOfObject(pobSprite);
		if (uIndex != -1)
		{
			m_pobDescendants->removeObjectAtIndex(uIndex);

			// update all sprites beyond this one
			unsigned int count = m_pobDescendants->count();

			for(; uIndex < count; ++uIndex)
			{
				CCSprite* s = (CCSprite*)(m_pobDescendants->getObjectAtIndex(uIndex));
				s->setAtlasIndex( s->getAtlasIndex() - 1 );
			}
		}

		// remove children recursively
		NSMutableArray<CCNode*> *pChildren = pobSprite->getChildren();
		if (pChildren && pChildren->count() > 0)
		{
			CCSprite *pSprite;
			NSMutableArray<CCNode*>::NSMutableArrayIterator iter;
			for (iter = pChildren->begin(); iter != pChildren->end(); ++iter)
			{
				pSprite = (CCSprite*)(*iter);

				if (! pSprite)
				{
					break;
				}

				removeSpriteFromAtlas(pSprite);
			}
		}
	}

	void CCSpriteBatchNode::updateBlendFunc(void)
	{
		if (! m_pobTextureAtlas->getTexture()->getHasPremultipliedAlpha())
		{
			m_blendFunc.src = GL_SRC_ALPHA;
			m_blendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
		}
	}

	// CocosNodeTexture protocol
	void CCSpriteBatchNode::setBlendFunc(ccBlendFunc blendFunc)
	{
		m_blendFunc = blendFunc;
	}

	ccBlendFunc CCSpriteBatchNode::getBlendFunc(void)
	{
		return m_blendFunc;
	}

	CCTexture2D* CCSpriteBatchNode::getTexture(void)
	{
		return m_pobTextureAtlas->getTexture();
	}

	void CCSpriteBatchNode::setTexture(CCTexture2D *texture)
	{
		m_pobTextureAtlas->setTexture(texture);
		updateBlendFunc();
	}

}