/*
Copyright (C) 2003 Rice1964

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#ifndef __CONVERTIMAGE_H__
#define __CONVERTIMAGE_H__

#include "Texture.h"
#include "TextureManager.h"
#include "typedefs.h"

class CTexture;
class TxtrInfo;


static const uint8 OneToEight[2] =
{
    0x00,       // 0 -> 00 00 00 00
    0xff        // 1 -> 11 11 11 11
};

static const uint8 OneToFour[2] =
{
    0x00,       // 0 -> 00 00 
    0x0f        // 1 -> 11 11 
};

static const uint8 TwoToEight[4] =
{
    0x00,       // 00 -> 00 00 00 00
    0x55,       // 01 -> 01 01 01 01
    0xaa,       // 10 -> 10 10 10 10
    0xff        // 11 -> 11 11 11 11
};

static const uint8 TwoToFour[4] =
{
    0x0,        // 00 -> 00 00 
    0x5,        // 01 -> 01 01 
    0xa,        // 10 -> 10 10 
    0xf         // 11 -> 11 11
};

static const uint8 ThreeToEight[8] =
{
    0x00,       // 000 -> 00 00 00 00
    0x24,       // 001 -> 00 10 01 00
    0x49,       // 010 -> 01 00 10 01
    0x6d,       // 011 -> 01 10 11 01
    0x92,       // 100 -> 10 01 00 10
    0xb6,       // 101 -> 10 11 01 10
    0xdb,       // 110 -> 11 01 10 11
    0xff        // 111 -> 11 11 11 11
};

static const uint8 ThreeToFour[8] =
{
    0x0,        // 000 -> 00 00 00 00
    0x2,        // 001 -> 00 10 01 00
    0x4,        // 010 -> 01 00 10 01
    0x6,        // 011 -> 01 10 11 01
    0x9,        // 100 -> 10 01 00 10
    0xb,        // 101 -> 10 11 01 10
    0xd,        // 110 -> 11 01 10 11
    0xf         // 111 -> 11 11 11 11
};

static const uint8 FourToEight[16] = 
{
    0x00, 0x11, 0x22, 0x33,
    0x44, 0x55, 0x66, 0x77,
    0x88, 0x99, 0xaa, 0xbb,
    0xcc, 0xdd, 0xee, 0xff
};

static const uint16 FourToSixteen[16] = 
{
    0x0000, 0x1111, 0x2222, 0x3333,
    0x4444, 0x5555, 0x6666, 0x7777,
    0x8888, 0x9999, 0xaaaa, 0xbbbb,
    0xcccc, 0xdddd, 0xeeee, 0xffff
};

static const uint8 FiveToEight[32] =
{
    0x00, // 00000 -> 00000000
    0x08, // 00001 -> 00001000
    0x10, // 00010 -> 00010000
    0x18, // 00011 -> 00011000
    0x21, // 00100 -> 00100001
    0x29, // 00101 -> 00101001
    0x31, // 00110 -> 00110001
    0x39, // 00111 -> 00111001
    0x42, // 01000 -> 01000010
    0x4a, // 01001 -> 01001010
    0x52, // 01010 -> 01010010
    0x5a, // 01011 -> 01011010
    0x63, // 01100 -> 01100011
    0x6b, // 01101 -> 01101011
    0x73, // 01110 -> 01110011
    0x7b, // 01111 -> 01111011
    
    0x84, // 10000 -> 10000100
    0x8c, // 10001 -> 10001100
    0x94, // 10010 -> 10010100
    0x9c, // 10011 -> 10011100
    0xa5, // 10100 -> 10100101
    0xad, // 10101 -> 10101101
    0xb5, // 10110 -> 10110101
    0xbd, // 10111 -> 10111101
    0xc6, // 11000 -> 11000110
    0xce, // 11001 -> 11001110
    0xd6, // 11010 -> 11010110
    0xde, // 11011 -> 11011110
    0xe7, // 11100 -> 11100111
    0xef, // 11101 -> 11101111
    0xf7, // 11110 -> 11110111
    0xff  // 11111 -> 11111111
};


#define RGBA5551_RedMask   (0xF800)
#define RGBA5551_GreenMask (0x07C0)
#define RGBA5551_BlueMask  (0x003E)
#define RGBA5551_AlphaMask (0x0001)


#define RGBA5551_RedShift   11
#define RGBA5551_GreenShift 6
#define RGBA5551_BlueShift  1
#define RGBA5551_AlphaShift 0

#define RGBA565_RedMask     (0xF800)
#define RGBA565_GreenMask   (0x07E0)
#define RGBA565_BlueMask    (0x001F)

#define RGBA565_RedShift    11
#define RGBA565_GreenShift  5
#define RGBA565_BlueShift   0

inline uint16 ConvertRGBTo555(uint8 red, uint8 grn, uint8 blu)
{
    return (uint16)(((uint16)(red >> 3) << RGBA5551_RedShift) |
                  ((uint16)(grn >> 3) << RGBA5551_GreenShift) |
                  ((uint16)(blu >> 3) << RGBA5551_BlueShift) |
                  ((uint16)(1)        << RGBA5551_AlphaShift));
}

inline uint16 ConvertRGBTo565(uint8 red, uint8 grn, uint8 blu)
{
    return (uint16)(((uint16)(red >> 3) << RGBA565_RedShift) |
                  ((uint16)(grn >> 2) << RGBA565_GreenShift) |
                  ((uint16)(blu >> 3) << RGBA565_BlueShift));
}
inline uint16 Convert555To565(uint16 w555)
{
    // Probably a faster method by fudging the low bits..

    uint8 red = FiveToEight[(w555&RGBA5551_RedMask)  >> RGBA5551_RedShift];
    uint8 grn = FiveToEight[(w555&RGBA5551_GreenMask)>> RGBA5551_GreenShift];
    uint8 blu = FiveToEight[(w555&RGBA5551_BlueMask) >> RGBA5551_BlueShift];

    return ConvertRGBTo565(red, grn, blu);
}

#define R4G4B4A4_MAKE(r,g,b,a)  ((uint16)(((a) << 12) | ((r)<< 8) | ((g)<<4) | (b)))


inline uint32 Convert555ToRGBA(uint16 w555)
{
    uint32 dwRed   = FiveToEight[(w555&RGBA5551_RedMask)  >> RGBA5551_RedShift];
    uint32 dwGreen = FiveToEight[(w555&RGBA5551_GreenMask)>> RGBA5551_GreenShift];
    uint32 dwBlue  = FiveToEight[(w555&RGBA5551_BlueMask) >> RGBA5551_BlueShift];
    uint32 dwAlpha =             (w555&RGBA5551_AlphaMask) ? 0xFF : 0x00;
    return COLOR_RGBA(dwRed, dwGreen, dwBlue, dwAlpha);

}
inline uint16 Convert555ToR4G4B4A4(uint16 w555)
{
    uint8 dwRed   = ((w555&RGBA5551_RedMask)  >> RGBA5551_RedShift)>>1;
    uint8 dwGreen = ((w555&RGBA5551_GreenMask)>> RGBA5551_GreenShift)>>1;
    uint8 dwBlue  = ((w555&RGBA5551_BlueMask) >> RGBA5551_BlueShift)>>1;
    uint8 dwAlpha =             (w555&RGBA5551_AlphaMask) ? 0xF : 0x0;

    return R4G4B4A4_MAKE(dwRed, dwGreen, dwBlue, dwAlpha);
}

inline uint32 ConvertIA4ToRGBA(uint8 IA4)
{
    uint32 I = ThreeToEight[(IA4 & 0x0F) >> 1];
    uint32 A = OneToEight[(IA4 & 0x01)];        
    return COLOR_RGBA(I, I, I, A);
}

inline uint16 ConvertIA4ToR4G4B4A4(uint8 IA4)
{
    uint32 I = ThreeToFour[(IA4 & 0x0F) >> 1];
    uint32 A = OneToFour[(IA4 & 0x01)];     
    return R4G4B4A4_MAKE(I, I, I, A);
}
inline uint32 ConvertI4ToRGBA(uint8 I4)
{
    uint32 I = FourToEight[I4 & 0x0F];
    return COLOR_RGBA(I, I, I, I);
}

inline uint16 ConvertI4ToR4G4B4A4(uint8 I4)
{
    return FourToSixteen[I4 & 0x0F];
}

inline uint32 ConvertIA16ToRGBA(uint16 wIA)
{
    uint32 dwIntensity = (wIA >> 8) & 0xFF;
    uint32 dwAlpha     = (wIA     ) & 0xFF;
    return COLOR_RGBA(dwIntensity, dwIntensity, dwIntensity, dwAlpha);
}

inline uint16 ConvertIA16ToR4G4B4A4(uint16 wIA)
{
    uint16 dwIntensity = (wIA >> 12) & 0x0F;
    uint16 dwAlpha     = (wIA >> 4) & 0x0F;

    return R4G4B4A4_MAKE(dwIntensity, dwIntensity, dwIntensity, dwAlpha);
}

extern int g_convk0,g_convk1,g_convk2,g_convk3,g_convk4,g_convk5;
extern float g_convc0,g_convc1,g_convc2,g_convc3,g_convc4,g_convc5;

uint32 ConvertYUV16ToR8G8B8(int Y, int U, int V);
uint16 ConvertYUV16ToR4G4B4(int Y, int U, int V);


typedef void    ( * ConvertFunction )( CTexture * p_texture, const TxtrInfo & ti );

void ConvertRGBA16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertRGBA32(CTexture *pTexture, const TxtrInfo &tinfo);


void ConvertIA4(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertIA8(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertIA16(CTexture *pTexture, const TxtrInfo &tinfo);

void ConvertI4(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertI8(CTexture *pTexture, const TxtrInfo &tinfo);

void ConvertCI4( CTexture *pTexture, const TxtrInfo & ti );
void ConvertCI8( CTexture *pTexture, const TxtrInfo & ti );

void ConvertCI4_RGBA16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertCI4_IA16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertCI8_RGBA16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertCI8_IA16(CTexture *pTexture, const TxtrInfo &tinfo);

void ConvertYUV(CTexture *pTexture, const TxtrInfo &tinfo);

// 16 a4r4g4b4
void ConvertRGBA16_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertRGBA32_16(CTexture *pTexture, const TxtrInfo &tinfo);


void ConvertIA4_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertIA8_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertIA16_16(CTexture *pTexture, const TxtrInfo &tinfo);

void ConvertI4_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertI8_16(CTexture *pTexture, const TxtrInfo &tinfo);

void ConvertCI4_16( CTexture *pTexture, const TxtrInfo & ti );
void ConvertCI8_16( CTexture *pTexture, const TxtrInfo & ti );

void ConvertCI4_RGBA16_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertCI4_IA16_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertCI8_RGBA16_16(CTexture *pTexture, const TxtrInfo &tinfo);
void ConvertCI8_IA16_16(CTexture *pTexture, const TxtrInfo &tinfo);

void ConvertYUV_16(CTexture *pTexture, const TxtrInfo &tinfo);

void Convert4b(CTexture *pTexture, const TxtrInfo &tinfo);
void Convert8b(CTexture *pTexture, const TxtrInfo &tinfo);
void Convert16b(CTexture *pTexture, const TxtrInfo &tinfo);

void Convert4b_16(CTexture *pTexture, const TxtrInfo &tinfo);
void Convert8b_16(CTexture *pTexture, const TxtrInfo &tinfo);
void Convert16b_16(CTexture *pTexture, const TxtrInfo &tinfo);

#endif

