axmol/cocos2dx/include/CCTextureCache.h

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#ifndef __CCTEXTURE_CACHE_H__
#define __CCTEXTURE_CACHE_H__

#include <string>
#include "NSObject.h"
#include "NSMutableDictionary.h"

namespace   cocos2d {
class CCTexture2D;
class CCAsyncObject;
class NSLock;
class UIImage;

typedef void (*fpAsyncCallback)(CCTexture2D*, void*);

/** Singleton that handles the loading of textures
* Once the texture is loaded, the next time it will return
* a reference of the previously loaded texture reducing GPU & CPU memory
*/
class CCX_DLL CCTextureCache : public NSObject
{
protected:
	NSMutableDictionary<std::string, CCTexture2D*> * m_pTextures;
	NSLock				*m_pDictLock;
	NSLock				*m_pContextLock;

private:
	void addImageWithAsyncObject(CCAsyncObject* async);

public:

	CCTextureCache();
	virtual ~CCTextureCache();

	char * description(void);

	/** Retruns ths shared instance of the cache */
	static CCTextureCache * sharedTextureCache();

	/** purges the cache. It releases the retained instance.
	@since v0.99.0
	*/
	static void purgeSharedTextureCache();

	/** Returns a Texture2D object given an file image
	* If the file image was not previously loaded, it will create a new CCTexture2D
	*  object and it will return it. It will use the filename as a key.
	* Otherwise it will return a reference of a previosly loaded image.
	* Supported image extensions: .png, .bmp, .tiff, .jpeg, .pvr, .gif
	*/
	CCTexture2D* addImage(const char* fileimage);

	/** Returns a Texture2D object given a file image
	* If the file image was not previously loaded, it will create a new CCTexture2D object and it will return it.
	* Otherwise it will load a texture in a new thread, and when the image is loaded, the callback will be called with the Texture2D as a parameter.
	* The callback will be called from the main thread, so it is safe to create any cocos2d object from the callback.
	* Supported image extensions: .png, .bmp, .tiff, .jpeg, .pvr, .gif
	* @since v0.8
	*/
	/// @todo selector
	void addImageAsync(const char* filename, NSObject*target, fpAsyncCallback func);

#if _POWERVR_SUPPORT_
	/** Returns a Texture2D object given an PVRTC RAW filename
	* If the file image was not previously loaded, it will create a new CCTexture2D
	*  object and it will return it. Otherwise it will return a reference of a previosly loaded image
	*
	* It can only load square images: width == height, and it must be a power of 2 (128,256,512...)
	* bpp can only be 2 or 4. 2 means more compression but lower quality.
	* hasAlpha: whether or not the image contains alpha channel
	*/
	CCTexture2D* addPVRTCImage(const char* fileimage, int bpp, bool hasAlpha, int width);

	/** Returns a Texture2D object given an PVRTC filename
	* If the file image was not previously loaded, it will create a new CCTexture2D
	*  object and it will return it. Otherwise it will return a reference of a previosly loaded image
	*/
	CCTexture2D* addPVRTCImage(const char* fileimage);
#endif

	/** Returns a Texture2D object given an CGImageRef image
	* If the image was not previously loaded, it will create a new CCTexture2D object and it will return it.
	* Otherwise it will return a reference of a previously loaded image
	* The "key" parameter will be used as the "key" for the cache.
	* If "key" is nil, then a new texture will be created each time.
	* @since v0.8
	*/
	/// @todo CGImageRef CCTexture2D* addCGImage(CGImageRef image, string &  key);
	/** Returns a Texture2D object given an UIImage image
	* If the image was not previously loaded, it will create a new CCTexture2D object and it will return it.
	* Otherwise it will return a reference of a previously loaded image
	* The "key" parameter will be used as the "key" for the cache.
	* If "key" is nil, then a new texture will be created each time.
	*/
	CCTexture2D* addUIImage(UIImage *image, const char *key);
	/** Purges the dictionary of loaded textures.
	* Call this method if you receive the "Memory Warning"
	* In the short term: it will free some resources preventing your app from being killed
	* In the medium term: it will allocate more resources
	* In the long term: it will be the same
	*/
	void removeAllTextures();

	/** Removes unused textures
	* Textures that have a retain count of 1 will be deleted
	* It is convinient to call this method after when starting a new Scene
	* @since v0.8
	*/
	void removeUnusedTextures();

	/** Deletes a texture from the cache given a texture
	*/
	void removeTexture(CCTexture2D* texture);

	/** Deletes a texture from the cache given a its key name
	@since v0.99.4
	*/
	void removeTextureForKey(const std::string & textureKeyName);
};
}//namespace   cocos2d 

#endif //__CCTEXTURE_CACHE_H__