axmol/cocos/2d/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 Node, public TextureProtocol
{    
public:
	/** 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 std::string& filename, int tileWidth, int tileHeight, int itemsToRender);

    /** updates the Atlas (indexed vertex array).
    * Shall be overridden in subclasses
    */
    virtual void updateAtlasValues();

    void setTextureAtlas(TextureAtlas* textureAtlas);
    TextureAtlas* getTextureAtlas() const;
    
    void setQuadsToDraw(ssize_t quadsToDraw);
    ssize_t getQuadsToDraw() const;

    
    // Overrides
    virtual void draw() override;
    virtual Texture2D* getTexture() const override;
    virtual void setTexture(Texture2D *texture) override;
    virtual bool isOpacityModifyRGB() const override;
    virtual void setOpacityModifyRGB(bool isOpacityModifyRGB) override;
    virtual const Color3B& getColor(void) const override;
    virtual void setColor(const Color3B& color) override;
    virtual void setOpacity(GLubyte opacity) override;
    /**
    * @code
    * When this function bound into js or lua,the parameter will be changed
    * In js: var setBlendFunc(var src, var dst)
    * @endcode
    * @lua NA
    */
    virtual void setBlendFunc(const BlendFunc& blendFunc) override;
    /**
    * @js NA
    * @lua NA
    */
    virtual const BlendFunc& getBlendFunc() const override;


protected:
    AtlasNode();
    virtual ~AtlasNode();

    /** initializes an AtlasNode  with an Atlas file the width and height of each item and the quantity of items to render*/
    bool initWithTileFile(const std::string& tile, int tileWidth, int tileHeight, 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, int tileWidth, int tileHeight, int itemsToRender);

    void calculateMaxItems();
    void updateBlendFunc();
    void updateOpacityModifyRGB();

    friend class Director;
    void setIgnoreContentScaleFactor(bool bIgnoreContentScaleFactor);

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

    //! width of each char
    int    _itemWidth;
    //! height of each char
    int    _itemHeight;
    
    Color3B    _colorUnmodified;
    
    TextureAtlas* _textureAtlas;
    // protocol variables
    bool _isOpacityModifyRGB;
    BlendFunc _blendFunc;

    // quads to draw
    ssize_t _quadsToDraw;
    // color uniform
    GLint    _uniformColor;
    // This varible is only used for LabelAtlas FPS display. So plz don't modify its value.
    bool _ignoreContentScaleFactor;

private:
    CC_DISALLOW_COPY_AND_ASSIGN(AtlasNode);

};

// end of base_node group
/// @}

NS_CC_END

#endif // __CCATLAS_NODE_H__