/*      $NetBSD: grfabs_fal.h,v 1.6 2023/01/06 10:28:28 tsutsui Exp $   */

/*
* Copyright (c) 1995 Thomas Gerner.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _GRFABS_FAL_H
#define _GRFABS_FAL_H
/*
* Struct to hold the values for the different video modes
*/
struct videl {
   u_short video_mode;         /* video mode                       */
   u_char  vd_syncmode;        /* Syncronisation                   */
   u_short vd_line_wide;       /* Falcon line word distance        */
   u_short vd_vert_wrap;       /* Falcon line length               */
   u_char  vd_st_res;          /* ST resolution                    */
   u_short vd_fal_res;         /* Falcon resolution                */
   u_short vd_h_hold_tim;      /* Falcon horizontal hold timer     */
   u_short vd_h_bord_beg;      /* Falcon horizontal border begin   */
   u_short vd_h_bord_end;      /* Falcon horizontal border end     */
   u_short vd_h_dis_beg;       /* Falcon horizontal display begin  */
   u_short vd_h_dis_end;       /* Falcon horizontal display end    */
   u_short vd_h_ss;            /* Falcon horizontal SS             */
   u_short vd_h_fs;            /* Falcon horizontal FS             */
   u_short vd_h_hh;            /* Falcon horizontal HH             */
   u_short vd_v_freq_tim;      /* Falcon vertical frequency timer  */
   u_short vd_v_bord_beg;      /* Falcon vertical border begin     */
   u_short vd_v_bord_end;      /* Falcon vertical border end       */
   u_short vd_v_dis_beg;       /* Falcon vertical display begin    */
   u_short vd_v_dis_end;       /* Falcon vertical display end      */
   u_short vd_v_ss;            /* Falcon vertical SS               */
   u_short vd_fal_ctrl;        /* Falcon video control             */
   u_short vd_fal_mode;        /* Falcon video mode                */
};


/*
* Colormap related macro's
*/
#define CM_L2FAL(v) \
   (((0x003f0000 & (v)) << 10) | ((0x00003f00 & (v)) << 10) |\
     (0x0000003f & (v)) << 2)
#define CM_FAL2L(v) \
   (((((0xfc000000 & (v)) >> 10) * 0xff / 0x3f) & 0x00ff0000) |\
    ((((0x00fc0000 & (v)) >> 10) * 0xff / 0x3f) & 0x0000ff00) |\
      ((0x000000fc & (v)) >>  2) * 0xff / 0x3f)
#define CM_L2ST(v) \
   (((0x000e0000 & (v)) >> 9) | ((0x00000e00 & (v)) >> 5) |\
     (0x0000000e & (v)) >> 1)
#define CM_ST2L(v) \
   (((((0x00000700 & (v)) * 0xff / 0x7) << 8) & 0x00ff0000) |\
    ((((0x00000070 & (v)) * 0xff / 0x7) << 4) & 0x0000ff00) |\
       (0x00000007 & (v)) * 0xff / 0x7)

void falcon_probe_video(MODES *);
#endif /*  _GRFABS_FAL_H */