d_event.pas

//------------------------------------------------------------------------------
//
//  FPCDoom - Port of Doom to Free Pascal Compiler
//  Copyright (C) 1993-1996 by id Software, Inc.
//  Copyright (C) 2004-2007 by Jim Valavanis
//  Copyright (C) 2017-2022 by Jim Valavanis
//
//  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.
//
//------------------------------------------------------------------------------
//  E-Mail: jimmyvalavanis@yahoo.gr
//  Site  : https://sourceforge.net/projects/fpcdoom/
//------------------------------------------------------------------------------

{$I FPCDoom.inc}

unit d_event;

interface

//
// Event handling.
//
// Input event types.

type
  evtype_t = (ev_keydown, ev_keyup, ev_mouse, ev_joystick);

// Event structure.
// keys / mouse/joystick buttons
// mouse/joystick x move
// mouse/joystick y move

  event_t = record
    _type: evtype_t;
    data1: integer;
    data2: integer;
    data3: integer;
  end;
  Pevent_t = ^event_t;

  gameaction_t = (ga_nothing, ga_loadlevel, ga_newgame, ga_loadgame,
                  ga_savegame, ga_playdemo, ga_completed,
                  ga_victory, ga_worlddone, ga_screenshot);

//
// Button/action code definitions.
//
// Press "Fire".
// Use button, to open doors, activate switches.
// Flag: game events, not really buttons.
// Flag, weapon change pending.
// If true, the next 3 bits hold weapon num.
// The 3bit weapon mask and shift, convenience.
// Pause the game.
// Save the game at each console.
// Savegame slot numbers
//  occupy the second byte of buttons.

const
  // Press "Fire".
  BT_ATTACK = 1;
  // Use button, to open doors, activate switches.
  BT_USE = 2;

  // Flag: game events, not really buttons.
  BT_SPECIAL = 128;
  BT_SPECIALMASK = 3;

  // Flag, weapon change pending.
  // If true, the next 3 bits hold weapon num.
  BT_CHANGE = 4;
  // The 3bit weapon mask and shift, convenience.
  BT_WEAPONMASK = (8+16+32);
  BT_WEAPONSHIFT = 3;

  // Pause the game.
  BTS_PAUSE = 1;
  // Save the game at each console.
  BTS_SAVEGAME = 2;

  // Savegame slot numbers
  //  occupy the second byte of buttons.
  BTS_SAVEMASK = (4 + 8 + 16);
  BTS_SAVESHIFT = 2;

// Commands Actions
const
  CM_SAVEGAME = 1;

//
// GLOBAL VARIABLES
//

const
  MAXEVENTS = 256;

const
  NUMJOYBUTTONS = 12;

var
//
// EVENT HANDLING
//
// Events are asynchronous inputs generally generated by the game user.
// Events can be discarded if no responder claims them
//
  events: array[0..MAXEVENTS - 1] of event_t;
  eventhead: integer;
  eventtail: integer;

implementation

end.