/**************************************************************************\

$Header: o:\src/RCS/LUT.C 1.2 95/07/07 06:15:26 jyharbec Exp $

$Log:	LUT.C $
 * Revision 1.2  95/07/07  06:15:26  jyharbec
 * *** empty log message ***
 * 
 * Revision 1.1  95/05/02  05:16:18  jyharbec
 * Initial revision
 * 

\**************************************************************************/

/*/****************************************************************************
*          name: SetMGALut
*
*   description: Keep the Current LUT, Update it on request and send it to the
*                RAMDAC.
*
*      designed: Bart Simpson, february 11, 1993
* last modified: $Author: jyharbec $, $Date: 95/07/07 06:15:26 $
*
*       version: $Id: LUT.C 1.2 95/07/07 06:15:26 jyharbec Exp $
*
*
* void SetMGALUT(byte PWidth)
*
******************************************************************************/

#include "switches.h"

#ifndef WINDOWS_NT
  #include <stdio.h>
#endif

#include "defbind.h"
#include "bind.h"
#include "def.h"
#include "mga.h"
#include "mgai.h"

#ifdef WINDOWS_NT
    void SetMGALUT(byte PWidth);

  #if defined(ALLOC_PRAGMA)
    #pragma alloc_text(PAGE,SetMGALUT)
  #endif
#endif  /* #ifdef WINDOWS_NT */


static byte MGALUT[256] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                            10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
                            20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
                            30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
                            40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
                            50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
                            60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
                            70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
                            80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
                            90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
                            100, 101, 102, 103, 104, 105, 106, 107, 108, 109,
                            110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
                            120, 121, 122, 123, 124, 125, 126, 127, 128, 129,
                            130, 131, 132, 133, 134, 135, 136, 137, 138, 139,
                            140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
                            150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
                            160, 161, 162, 163, 164, 165, 166, 167, 168, 169,
                            170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
                            180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
                            190, 191, 192, 193, 194, 195, 196, 197, 198, 199,
                            200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
                            210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
                            220, 221, 222, 223, 224, 225, 226, 227, 228, 229,
                            230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
                            240, 241, 242, 243, 244, 245, 246, 247, 248, 249,
                            250, 251, 252, 253, 254, 255};


extern volatile byte _FAR* pMGA;
extern HwData Hw[];
extern byte iBoard;

/*** PROTOTYPES ***/
extern void WriteErr(char string[]);
extern void delay_us(dword delai);


/*---------------------------------------------------------------------------
|          name: SetMGALUT
|
|   description: Initialise a look-up table of a ramdac
|                                 
|    parameters: - PWidth: pixel width of the current mode
|         calls: - 
|       returns: - 
----------------------------------------------------------------------------*/

void SetMGALUT(byte PWidth)
   {
   word i;


   /*** Send The LUT to the RAMDAC ***/

   switch (  Hw[iBoard].EpromData.RamdacType >> 8 )
      {

      case TVP3026:
      case TVP3030:


         switch (PWidth)
            {
            case (byte)(STORM_PWIDTH_PW8 >> STORM_PWIDTH_A):
               for (i = 0; i < 256; i++)   /*** This is a 3:3:2 (RGB) LUT ***/
                  {
                  dacWriteBYTE(TVP3026_WADR_PAL, (byte)i);
                  dacWriteBYTE(TVP3026_COL_PAL, MGALUT[(((i>>5)&7)*0x2492)>>8]);
                  dacWriteBYTE(TVP3026_COL_PAL, MGALUT[(((i>>2)&7)*0x2492)>>8]);
                  dacWriteBYTE(TVP3026_COL_PAL, MGALUT[(i&3)*85]);
                  }
               break;




            case (byte)(STORM_PWIDTH_PW16 >> STORM_PWIDTH_A):
            case (byte)(STORM_PWIDTH_PW24 >> STORM_PWIDTH_A):
            case (byte)(STORM_PWIDTH_PW32 >> STORM_PWIDTH_A):

               for (i = 0; i < 256; i++)
                  {
                  dacWriteBYTE(TVP3026_WADR_PAL, (byte)i);
                  dacWriteBYTE(TVP3026_COL_PAL, MGALUT[i]);
                  dacWriteBYTE(TVP3026_COL_PAL, MGALUT[i]);
                  dacWriteBYTE(TVP3026_COL_PAL, MGALUT[i]);
                  }
               break;

               }
         break;


     default:
         WriteErr("SetMGALUT: Wrong DacType\n");
         break;
     }

}