axmol/cocos2dx/base_nodes/CCAtlasNode.h

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

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#ifndef __CCATLAS_NODE_H__
#define __CCATLAS_NODE_H__

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

NS_CC_BEGIN

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 CCNode, public CCRGBAProtocol, public CCTextureProtocol
{
protected:

    //! chars per row
    unsigned int m_uItemsPerRow;
    //! chars per column
    unsigned int m_uItemsPerColumn;

    //! width of each char
    unsigned int    m_uItemWidth;
    //! height of each char
    unsigned int    m_uItemHeight;

    ccColor3B    m_tColorUnmodified;

    CC_PROPERTY(CCTextureAtlas*, m_pTextureAtlas, TextureAtlas);

    // protocol variables
    CC_PROPERTY(bool, m_bIsOpacityModifyRGB, IsOpacityModifyRGB)
    CC_PROPERTY(ccBlendFunc, m_tBlendFunc, BlendFunc);
    CC_PROPERTY(GLubyte, m_cOpacity, Opacity);
    CC_PROPERTY_PASS_BY_REF(ccColor3B, m_tColor, Color);

    // quads to draw
    CC_PROPERTY(unsigned int, m_uQuadsToDraw, QuadsToDraw);
    // color uniform
    GLint    m_nUniformColor;
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 * atlasWithTileFile(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);

    /** updates the Atlas (indexed vertex array).
    * Shall be overriden 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);

private :
    void calculateMaxItems();
    void updateBlendFunc();
    void updateOpacityModifyRGB();

};

NS_CC_END

#endif // __CCATLAS_NODE_H__