axmol/cocos2dx/include/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"

namespace   cocos2d {
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();

};
}//namespace   cocos2d 

#endif // __CCATLAS_NODE_H__