axmol/cocos2dx/sprite_nodes/CCSpriteBatchNode.h

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2009-2010 Ricardo Quesada
Copyright (C) 2009      Matt Oswald
Copyright (c) 2011      Zynga Inc.

http://www.cocos2d-x.org

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all copies or substantial portions of the Software.

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****************************************************************************/

#ifndef __CC_SPRITE_BATCH_NODE_H__
#define __CC_SPRITE_BATCH_NODE_H__

#include "CCNode.h"
#include "CCProtocols.h"
#include "CCTextureAtlas.h"
#include "ccMacros.h"
#include "CCArray.h"

NS_CC_BEGIN

#define kDefaultSpriteBatchCapacity   29

class CCSprite;

/** CCSpriteBatchNode is like a batch node: if it contains children, it will draw them in 1 single OpenGL call
* (often known as "batch draw").
*
* A CCSpriteBatchNode can reference one and only one texture (one image file, one texture atlas).
* Only the CCSprites that are contained in that texture can be added to the CCSpriteBatchNode.
* All CCSprites added to a CCSpriteBatchNode are drawn in one OpenGL ES draw call.
* If the CCSprites are not added to a CCSpriteBatchNode then an OpenGL ES draw call will be needed for each one, which is less efficient.
*
*
* Limitations:
*  - The only object that is accepted as child (or grandchild, grand-grandchild, etc...) is CCSprite or any subclass of CCSprite. eg: particles, labels and layer can't be added to a CCSpriteBatchNode.
*  - Either all its children are Aliased or Antialiased. It can't be a mix. This is because "alias" is a property of the texture, and all the sprites share the same texture.
* 
* @since v0.7.1
*/
class CC_DLL CCSpriteBatchNode : public CCNode, public CCTextureProtocol
{
public:
    ~CCSpriteBatchNode();

    // property
    
    // retain
    inline CCTextureAtlas* getTextureAtlas(void) { return m_pobTextureAtlas; }
    inline void setTextureAtlas(CCTextureAtlas* textureAtlas) 
    { 
        if (textureAtlas != m_pobTextureAtlas)
        {
            CC_SAFE_RETAIN(textureAtlas);
            CC_SAFE_RELEASE(m_pobTextureAtlas);
            m_pobTextureAtlas = textureAtlas;
        }
    }

    inline CCArray* getDescendants(void) { return m_pobDescendants; }

    /** creates a CCSpriteBatchNode with a texture2d and capacity of children.
    The capacity will be increased in 33% in runtime if it run out of space.
    @warning: This interface will be deprecated in future.
    */
    static CCSpriteBatchNode* batchNodeWithTexture(CCTexture2D* tex, unsigned int capacity = kDefaultSpriteBatchCapacity);

    /** creates a CCSpriteBatchNode with a file image (.png, .jpeg, .pvr, etc) and capacity of children.
    The capacity will be increased in 33% in runtime if it run out of space.
    The file will be loaded using the TextureMgr.
    @warning: This interface will be deprecated in future.
    */
    static CCSpriteBatchNode* batchNodeWithFile(const char* fileImage, unsigned int capacity = kDefaultSpriteBatchCapacity);

    /** creates a CCSpriteBatchNode with a texture2d and capacity of children.
    The capacity will be increased in 33% in runtime if it run out of space.
    */
    static CCSpriteBatchNode* createWithTexture(CCTexture2D* tex, unsigned int capacity = kDefaultSpriteBatchCapacity);

    /** creates a CCSpriteBatchNode with a file image (.png, .jpeg, .pvr, etc) and capacity of children.
    The capacity will be increased in 33% in runtime if it run out of space.
    The file will be loaded using the TextureMgr.
    */
    static CCSpriteBatchNode* create(const char* fileImage, unsigned int capacity = kDefaultSpriteBatchCapacity);

    /** initializes a CCSpriteBatchNode with a texture2d and capacity of children.
    The capacity will be increased in 33% in runtime if it run out of space.
    */
    bool initWithTexture(CCTexture2D *tex, unsigned int capacity);
    /** initializes a CCSpriteBatchNode with a file image (.png, .jpeg, .pvr, etc) and a capacity of children.
    The capacity will be increased in 33% in runtime if it run out of space.
    The file will be loaded using the TextureMgr.
    */
    bool initWithFile(const char* fileImage, unsigned int capacity);
    bool init();

    void increaseAtlasCapacity();

    /** removes a child given a certain index. It will also cleanup the running actions depending on the cleanup parameter.
    @warning Removing a child from a CCSpriteBatchNode is very slow
    */
    void removeChildAtIndex(unsigned int index, bool doCleanup);

    void insertChild(CCSprite *child, unsigned int index);
    void appendChild(CCSprite* sprite);
    void removeSpriteFromAtlas(CCSprite *sprite);

    unsigned int rebuildIndexInOrder(CCSprite *parent, unsigned int index);
    unsigned int highestAtlasIndexInChild(CCSprite *sprite);
    unsigned int lowestAtlasIndexInChild(CCSprite *sprite);
    unsigned int atlasIndexForChild(CCSprite *sprite, int z);
    /* Sprites use this to start sortChildren, don't call this manually */
    void reorderBatch(bool reorder);
    // CCTextureProtocol
    virtual CCTexture2D* getTexture(void);
    virtual void setTexture(CCTexture2D *texture);
    virtual void setBlendFunc(ccBlendFunc blendFunc);
    virtual ccBlendFunc getBlendFunc(void);

    virtual void visit(void);
    virtual void addChild(CCNode * child);
    virtual void addChild(CCNode * child, int zOrder);
    virtual void addChild(CCNode * child, int zOrder, int tag);
    virtual void reorderChild(CCNode * child, int zOrder);
        
    virtual void removeChild(CCNode* child, bool cleanup);
    virtual void removeAllChildrenWithCleanup(bool cleanup);
    virtual void sortAllChildren();
    virtual void draw(void);

protected:
    /* IMPORTANT XXX IMPORTNAT:
    * These 2 methods can't be part of CCTMXLayer since they call [super add...], and CCSpriteSheet#add SHALL not be called
    */

    /* Adds a quad into the texture atlas but it won't be added into the children array.
    This method should be called only when you are dealing with very big AtlasSrite and when most of the CCSprite won't be updated.
    For example: a tile map (CCTMXMap) or a label with lots of characters (BitmapFontAtlas)
    */
    void addQuadFromSprite(CCSprite *sprite, unsigned int index);
    /* This is the opposite of "addQuadFromSprite.
    It add the sprite to the children and descendants array, but it doesn't update add it to the texture atlas
    */
    CCSpriteBatchNode * addSpriteWithoutQuad(CCSprite*child, unsigned int z, int aTag);

private:
    void updateAtlasIndex(CCSprite* sprite, int* curIndex);
    void swap(int oldIndex, int newIndex);
    void updateBlendFunc();

protected:
    CCTextureAtlas *m_pobTextureAtlas;
    ccBlendFunc m_blendFunc;

    // all descendants: chlidren, gran children, etc...
    CCArray* m_pobDescendants;
};

NS_CC_END

#endif // __CC_SPRITE_BATCH_NODE_H__