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

	This source file is part of Viewizard Game Engine
	For the latest info, see http://www.viewizard.com/

	File name: Texture.h

	Copyright (c) 2001-2007 Michael Kurinnoy, Viewizard
	All Rights Reserved.

	File Version: 3.0

******************************************************************************

	AstroMenace game source code available under "dual licensing" model.
	The licensing options available are:

	* Commercial Licensing. This is the appropriate option if you are
	  creating proprietary applications and you are not prepared to
	  distribute and share the source code of your application.
	  Contact us for pricing at viewizard@viewizard.com

	* Open Source Licensing. This is the appropriate option if you want
	  to share the source code of your application with everyone you
	  distribute it to, and you also want to give them the right to share
	  who uses it. You should have received a copy of the GNU General Public
	  License version 3 with this source codes.
	  If not, see <http://www.gnu.org/licenses/>.

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


#ifndef Texture_H
#define Texture_H


#include "../Base.h"
#include "../VirtualFileSystem/VFS.h"



// File types (for LoadAs parametre)
#define AUTO_FILE			0	// Detect by file extension
#define BMP_FILE			1	// BMP file
#define TGA_FILE			2	// TGA file
#define JPG_FILE			4	// JPG file

// Create alpha channel by image greyscale color
#define TX_ALPHA_GREYSC		0x0021
// Create alpha channel by equal Alpha color
#define TX_ALPHA_EQUAL		0x0022
// Create alpha channel by great or equal than Alpha color
#define TX_ALPHA_GEQUAL		0x0023
// Create alpha channel by less or equal Alpha color
#define TX_ALPHA_LEQUAL		0x0024
// Create alpha channel by great than Alpha color
#define TX_ALPHA_GREAT		0x0025
// Create alpha channel by less Alpha color
#define TX_ALPHA_LESS		0x0026

struct eTexture
{
	char*	Name;			// File name

	int		Filtering;		// Texture filtering mode (near, linear, ... )
	int		Address_Mode;	// Texture address mode (wrap, clamp)
	bool	MipMap;

	BYTE	ARed;			// Alpha channel red color
	BYTE	AGreen;			// Alpha channel green color
	BYTE	ABlue;			// Alpha channel blue color

	int		Width;			// Texture width
	int		Height;			// Texture height
	int		SrcWidth;		// Source image width
	int		SrcHeight;		// Source image height

	int		Bytes;			// Bytes Per Pixel

	// приоритет
	float	TexturePrior;


    GLuint	TextureID;		// Номер текстуры

	eTexture*	Prev;		// Pointer to the previous loaded Texture in the memory
	eTexture*	Next;		// Pointer to the next loaded Texture in the memory
	int			Num;		// ID number
};


// eTexture functions
// Load texture from file
eTexture*	vw_LoadTexture(const char *TextureName, const char *RememberAsName, bool NeedCompression, int LoadAs=AUTO_FILE, int NeedResizeW=0, int NeedResizeH=0);
// Release texture
void		vw_ReleaseTexture(eTexture* Texture);


// Texture manager functions

// Release all textures
void		vw_ReleaseAllTextures();
// Set textures properties
void		vw_SetTextureProp(int nFiltering, int nAddress_Mode, bool nAlpha = false, int nAFlag = TX_ALPHA_EQUAL, bool nMipMap = true);
// Set textures alpha color
void		vw_SetTextureAlpha(BYTE nARed, BYTE nAGreen, BYTE nABlue);

// Find texture by name
eTexture*	vw_FindTextureByName(const char *Name);
// Find texture by ID
eTexture*	vw_FindTextureByNum(int Num);

// Set texture by eTexture pointer
void		vw_SetTextureT(DWORD Stage, eTexture *Tex, int AnisotropyLevel);

// проверка и установка правильного приоритета текстур
void 		vw_CheckTexturesPrior();


#endif // Texture_H