/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

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of this software and associated documentation files (the "Software"), to deal
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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****************************************************************************/

#ifndef __CCATLAS_NODE_H__
#define __CCATLAS_NODE_H__

#include "2d/CCNode.h"
#include "base/CCProtocols.h"
#include "base/ccTypes.h"
#include "renderer/CCQuadCommand.h"

NS_CC_BEGIN

/**
 * @addtogroup _2d
 * @{
 */

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.
     *
     * @param filename The path of Atlas file.
     * @param tileWidth The width of the item.
     * @param tileHeight The height of the item.
     * @param itemsToRender 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();
    
    /** Set an buffer manager of the texture vertex. */
    void setTextureAtlas(TextureAtlas* textureAtlas);
    
    /** Return the buffer manager of the texture vertex. 
     *
     * @return Return A TextureAtlas.
     */
    TextureAtlas* getTextureAtlas() const;
    
    void setQuadsToDraw(ssize_t quadsToDraw);
    ssize_t getQuadsToDraw() const;

    
    // Overrides
    virtual void draw(Renderer *renderer, const Mat4 &transform, uint32_t flags) 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;
    /**
    * @lua NA
    */
    virtual const BlendFunc& getBlendFunc() const override;

CC_CONSTRUCTOR_ACCESS:
    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);

protected:
    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 variable is only used for LabelAtlas FPS display. So plz don't modify its value. */
    bool _ignoreContentScaleFactor;
    /** Quad command. */
    QuadCommand _quadCommand;

private:
    CC_DISALLOW_COPY_AND_ASSIGN(AtlasNode);

};

// end of base_node group
/// @}

NS_CC_END

#endif // __CCATLAS_NODE_H__