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 TextureAtlas;

/** @brief AtlasNode is a subclass of Node that implements the RGBAProtocol and TextureProtocol protocol

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

All features from Node are valid, plus the following features:
- opacity and RGB colors
*/
class CC_DLL AtlasNode : public NodeRGBA, public TextureProtocol
{
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;

    Color3B    _colorUnmodified;

    CC_PROPERTY(TextureAtlas*, _textureAtlas, TextureAtlas);

    // protocol variables
    bool _isOpacityModifyRGB;
    
    CC_PROPERTY_PASS_BY_REF(BlendFunc, _blendFunc, BlendFunc);

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

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

    /** initializes an AtlasNode  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 AtlasNode  with a texture the width and height of each item measured in points and the quantity of items to render*/
    bool initWithTexture(Texture2D* 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 Texture2D* getTexture(void);

    /** sets a new texture. it will be retained*/
    virtual void setTexture(Texture2D *texture);
    
    virtual bool isOpacityModifyRGB() const;
    virtual void setOpacityModifyRGB(bool isOpacityModifyRGB);
    virtual const Color3B& getColor(void) const;
    virtual void setColor(const Color3B& color);
    virtual void setOpacity(GLubyte opacity);

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

// end of base_node group
/// @}

NS_CC_END

#endif // __CCATLAS_NODE_H__