Texture.h
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	#ifndef _ECHOTEXTURE_H_
	#define _ECHOTEXTURE_H_

	#include <echo/Types.h>
	#include <string>

	namespace Echo
	{
	class TextureManager;

	//!\brief Texture encapsulates texture data.
	//!\details This class encapsulates texture data that is platform independent.
	//! Normally a texture object is passed to a render target which will then allocate any resources
	//! that the render target may need.
	class Texture
	{
	public:
	struct Formats
	{
	enum _
	{
	UNKNOWN,
	R8G8B8X8,
	R8G8B8A8,
	R8G8B8,
	R5G6B5,
	R5G5B5A1,
	R4G4B4A4,
	LUMINANCE8,
	LUMINANCE8_ALPHA8
	};
	static size_t GetBytesPerPixel(Formats::_ format)
	{
	switch(format)
	{
	case Formats::R8G8B8A8:
	case Formats::R8G8B8X8:
	return 4;
	case Formats::R8G8B8:
	return 3;
	case Formats::R5G6B5:
	case Formats::R5G5B5A1:
	case Formats::LUMINANCE8_ALPHA8:
	return 2;
	case Formats::LUMINANCE8:
	return 1;
	case Formats::UNKNOWN:
	default:
	break;
	}
	return 0;
	}
	};
	typedef Formats::_ Format;

	Texture(u32 width, u32 height, Format format);
	Texture(TextureManager& manager, const std::string& resourceName);
	virtual ~Texture();

	void SetResourceName(const std::string& resourceName);
	const std::string& GetResourceName() const;

	Texture(const Texture& rhs);
	const Texture& operator=(const Texture& rhs);

	//!\brief Get the width of the texture buffer.
	u32 GetWidth() const {return mWidth;}

	//!\brief Get the height of the texture buffer.
	u32 GetHeight() const {return mHeight;}

	//!\brief Get a pointer to the texture byte buffer.
	shared_ptr<u8> GetBuffer() {return mBuffer;}

	Format GetFormat() {return mFormat;}

	//!\brief Attempts to unload the texture data.
	//!\details This method will attempt to free the texture memory.
	//!\note This method will not free any memory if the texture data cannot be reloaded.
	//!\return The number of bytes freed.
	size_t AttemptUnload();

	//!\brief Unload the texture data from a resource.
	//!\note This method has not effect if the texture manager and resource names are not valid.
	//!\return Whether the resources was loaded or not.
	bool LoadResource();

	//!\brief Get the number of bytes per pixel.
	size_t GetBytesPerPixel() const;
	private:
	TextureManager* mTextureManager;
	std::string mResourceName;
	Format mFormat;
	u32 mWidth;
	u32 mHeight;
	shared_ptr<u8> mBuffer;
	};
	}
	#endif

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