axmol/cocos2dx/base_nodes/CCAtlasNode.h

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2011      Zynga Inc.

http://www.cocos2d-x.org

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#ifndef __CCATLAS_NODE_H__
#define __CCATLAS_NODE_H__

#include "CCNode.h"
#include "CCProtocols.h"
#include "ccTypes.h"

NS_CC_BEGIN

/**
 * @addtogroup base_nodes
 * @{
 */

class CCTextureAtlas;

/** @brief CCAtlasNode is a subclass of CCNode that implements the CCRGBAProtocol and CCTextureProtocol protocol

It knows how to render a TextureAtlas object.
If you are going to render a TextureAtlas consider subclassing CCAtlasNode (or a subclass of CCAtlasNode)

All features from CCNode are valid, plus the following features:
- opacity and RGB colors
*/
class CC_DLL CCAtlasNode : public CCNodeRGBA, public CCTextureProtocol
{
protected:

    //! chars per row
    unsigned int _itemsPerRow;
    //! chars per column
    unsigned int _itemsPerColumn;

    //! width of each char
    unsigned int    _itemWidth;
    //! height of each char
    unsigned int    _itemHeight;

    ccColor3B    _colorUnmodified;

    CC_PROPERTY(CCTextureAtlas*, _textureAtlas, TextureAtlas);

    // protocol variables
    bool _isOpacityModifyRGB;
    
    CC_PROPERTY(ccBlendFunc, _blendFunc, BlendFunc);

    // quads to draw
    CC_PROPERTY(unsigned int, _quadsToDraw, QuadsToDraw);
    // color uniform
    GLint    _uniformColor;
    // This varible is only used for CCLabelAtlas FPS display. So plz don't modify its value.
    bool _ignoreContentScaleFactor;
    
public:
    CCAtlasNode();
    virtual ~CCAtlasNode();

	/** creates a CCAtlasNode  with an Atlas file the width and height of each item and the quantity of items to render*/
	static CCAtlasNode * create(const char* tile,unsigned int tileWidth, unsigned int tileHeight, 
		unsigned int itemsToRender);

    /** initializes an CCAtlasNode  with an Atlas file the width and height of each item and the quantity of items to render*/
    bool initWithTileFile(const char* tile, unsigned int tileWidth, unsigned int tileHeight, unsigned int itemsToRender);

    /** initializes an CCAtlasNode  with a texture the width and height of each item measured in points and the quantity of items to render*/
    bool initWithTexture(CCTexture2D* texture, unsigned int tileWidth, unsigned int tileHeight, unsigned int itemsToRender);
    
    /** updates the Atlas (indexed vertex array).
    * Shall be overridden in subclasses
    */
    virtual void updateAtlasValues();

    virtual void draw(void);

    // CC Texture protocol

    /** returns the used texture*/
    virtual CCTexture2D* getTexture(void);

    /** sets a new texture. it will be retained*/
    virtual void setTexture(CCTexture2D *texture);
    
    virtual bool isOpacityModifyRGB();
    virtual void setOpacityModifyRGB(bool isOpacityModifyRGB);
    virtual const ccColor3B& getColor(void);
    virtual void setColor(const ccColor3B& color);
    virtual void setOpacity(GLubyte opacity);

private :
    void calculateMaxItems();
    void updateBlendFunc();
    void updateOpacityModifyRGB();
    
    friend class CCDirector;
    void setIgnoreContentScaleFactor(bool bIgnoreContentScaleFactor);
};

// end of base_node group
/// @}

NS_CC_END

#endif // __CCATLAS_NODE_H__