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

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#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
{    
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 char* tile,unsigned int tileWidth, unsigned int tileHeight,
                              unsigned int itemsToRender);
    /**
     * @js ctor
     */
    AtlasNode();
    /**
     * @js NA
     * @lua NA
     */
    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 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();

    void setTextureAtlas(TextureAtlas* textureAtlas);
    TextureAtlas* getTextureAtlas() const;
    
    void setQuadsToDraw(unsigned int quadsToDraw);
    unsigned int 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;

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

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;
    
    TextureAtlas* _textureAtlas;
    // protocol variables
    bool _isOpacityModifyRGB;
    BlendFunc _blendFunc;

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

// end of base_node group
/// @}

NS_CC_END

#endif // __CCATLAS_NODE_H__