src/engine/e_input.pas

   1 (* Copyright (C)  Doom 2D: Forever Developers
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *)
  16 {$INCLUDE ../shared/a_modes.inc}
  17 unit e_input;
  18
  19 interface
  20
  21 uses SysUtils, SDL2;
  22
  23 const
  24   e_MaxKbdKeys  = SDL_NUM_SCANCODES;
  25   e_MaxJoys     = 4;
  26   e_MaxJoyBtns  = 32;
  27   e_MaxJoyAxes  = 8;
  28   e_MaxJoyHats  = 8;
  29   e_MaxVirtKeys = 48;
  30
  31   e_MaxJoyKeys = e_MaxJoyBtns + e_MaxJoyAxes*2 + e_MaxJoyHats*4;
  32
  33   e_MaxInputKeys = e_MaxKbdKeys + e_MaxJoys*e_MaxJoyKeys + e_MaxVirtKeys - 1;
  34   // $$$..$$$ -  321 Keyboard buttons/keys
  35   // $$$..$$$ - 4*32 Joystick buttons
  36   // $$$..$$$ -  8*2 Joystick axes (- and +)
  37   // $$$..$$$ -  4*4 Joystick hats (L U R D)
  38   // $$$..$$$ -   48 Virtual buttons/keys
  39
  40   KBRD_END = e_MaxKbdKeys;
  41   JOYK_BEG = KBRD_END;
  42   JOYK_END = JOYK_BEG + e_MaxJoyBtns*e_MaxJoys;
  43   JOYA_BEG = JOYK_END;
  44   JOYA_END = JOYA_BEG + e_MaxJoyAxes*2*e_MaxJoys;
  45   JOYH_BEG = JOYA_END;
  46   JOYH_END = JOYH_BEG + e_MaxJoyHats*4*e_MaxJoys;
  47   VIRT_BEG = JOYH_END;
  48   VIRT_END = VIRT_BEG + e_MaxVirtKeys;
  49
  50   // these are apparently used in g_gui and g_game and elsewhere
  51   IK_INVALID = 0;
  52   IK_ESCAPE  = SDL_SCANCODE_ESCAPE;
  53   IK_RETURN  = SDL_SCANCODE_RETURN;
  54   IK_KPRETURN= SDL_SCANCODE_KP_ENTER;
  55   IK_ENTER   = SDL_SCANCODE_RETURN;
  56   IK_KPINSERT = SDL_SCANCODE_KP_0;
  57   IK_UP      = SDL_SCANCODE_UP;
  58   IK_KPUP    = SDL_SCANCODE_KP_8;
  59   IK_DOWN    = SDL_SCANCODE_DOWN;
  60   IK_KPDOWN  = SDL_SCANCODE_KP_2;
  61   IK_LEFT    = SDL_SCANCODE_LEFT;
  62   IK_KPLEFT  = SDL_SCANCODE_KP_4;
  63   IK_RIGHT   = SDL_SCANCODE_RIGHT;
  64   IK_KPRIGHT = SDL_SCANCODE_KP_6;
  65   IK_DELETE  = SDL_SCANCODE_DELETE;
  66   IK_HOME    = SDL_SCANCODE_HOME;
  67   IK_KPHOME  = SDL_SCANCODE_KP_7;
  68   IK_INSERT  = SDL_SCANCODE_INSERT;
  69   IK_SPACE   = SDL_SCANCODE_SPACE;
  70   IK_CONTROL = SDL_SCANCODE_LCTRL;
  71   IK_SHIFT   = SDL_SCANCODE_LSHIFT;
  72   IK_ALT     = SDL_SCANCODE_LALT;
  73   IK_TAB     = SDL_SCANCODE_TAB;
  74   IK_PAGEUP  = SDL_SCANCODE_PAGEUP;
  75   IK_KPPAGEUP= SDL_SCANCODE_KP_9;
  76   IK_PAGEDN  = SDL_SCANCODE_PAGEDOWN;
  77   IK_KPPAGEDN= SDL_SCANCODE_KP_3;
  78   IK_KP5     = SDL_SCANCODE_KP_5;
  79   IK_NUMLOCK = SDL_SCANCODE_NUMLOCKCLEAR;
  80   IK_KPDIVIDE= SDL_SCANCODE_KP_DIVIDE;
  81   IK_KPMULTIPLE= SDL_SCANCODE_KP_MULTIPLY;
  82   IK_KPMINUS = SDL_SCANCODE_KP_MINUS;
  83   IK_KPPLUS  = SDL_SCANCODE_KP_PLUS;
  84   IK_KPENTER = SDL_SCANCODE_KP_ENTER;
  85   IK_KPDOT   = SDL_SCANCODE_KP_PERIOD;
  86   IK_CAPSLOCK= SDL_SCANCODE_CAPSLOCK;
  87   IK_RSHIFT  = SDL_SCANCODE_RSHIFT;
  88   IK_CTRL    = SDL_SCANCODE_LCTRL;
  89   IK_RCTRL   = SDL_SCANCODE_RCTRL;
  90   IK_RALT    = SDL_SCANCODE_RALT;
  91   IK_WIN     = SDL_SCANCODE_LGUI;
  92   IK_RWIN    = SDL_SCANCODE_RGUI;
  93   IK_MENU    = SDL_SCANCODE_MENU;
  94   IK_PRINTSCR= SDL_SCANCODE_PRINTSCREEN;
  95   IK_SCROLLLOCK= SDL_SCANCODE_SCROLLLOCK;
  96   IK_LBRACKET= SDL_SCANCODE_LEFTBRACKET;
  97   IK_RBRACKET= SDL_SCANCODE_RIGHTBRACKET;
  98   IK_SEMICOLON= SDL_SCANCODE_SEMICOLON;
  99   IK_QUOTE   = SDL_SCANCODE_APOSTROPHE;
 100   IK_BACKSLASH= SDL_SCANCODE_BACKSLASH;
 101   IK_SLASH   = SDL_SCANCODE_SLASH;
 102   IK_COMMA   = SDL_SCANCODE_COMMA;
 103   IK_DOT     = SDL_SCANCODE_PERIOD;
 104   IK_EQUALS  = SDL_SCANCODE_EQUALS;
 105   IK_0      = SDL_SCANCODE_0;
 106   IK_1      = SDL_SCANCODE_1;
 107   IK_2      = SDL_SCANCODE_2;
 108   IK_3      = SDL_SCANCODE_3;
 109   IK_4      = SDL_SCANCODE_4;
 110   IK_5      = SDL_SCANCODE_5;
 111   IK_6      = SDL_SCANCODE_6;
 112   IK_7      = SDL_SCANCODE_7;
 113   IK_8      = SDL_SCANCODE_8;
 114   IK_9      = SDL_SCANCODE_9;
 115   IK_F1      = SDL_SCANCODE_F1;
 116   IK_F2      = SDL_SCANCODE_F2;
 117   IK_F3      = SDL_SCANCODE_F3;
 118   IK_F4      = SDL_SCANCODE_F4;
 119   IK_F5      = SDL_SCANCODE_F5;
 120   IK_F6      = SDL_SCANCODE_F6;
 121   IK_F7      = SDL_SCANCODE_F7;
 122   IK_F8      = SDL_SCANCODE_F8;
 123   IK_F9      = SDL_SCANCODE_F9;
 124   IK_F10     = SDL_SCANCODE_F10;
 125   IK_F11     = SDL_SCANCODE_F11;
 126   IK_F12     = SDL_SCANCODE_F12;
 127   IK_END     = SDL_SCANCODE_END;
 128   IK_KPEND   = SDL_SCANCODE_KP_1;
 129   IK_BACKSPACE = SDL_SCANCODE_BACKSPACE;
 130   IK_BACKQUOTE = SDL_SCANCODE_GRAVE;
 131   IK_GRAVE     = SDL_SCANCODE_GRAVE;
 132   IK_PAUSE   = SDL_SCANCODE_PAUSE;
 133   IK_Y       = SDL_SCANCODE_Y;
 134   IK_N       = SDL_SCANCODE_N;
 135   IK_W       = SDL_SCANCODE_W;
 136   IK_A       = SDL_SCANCODE_A;
 137   IK_S       = SDL_SCANCODE_S;
 138   IK_D       = SDL_SCANCODE_D;
 139   IK_Q       = SDL_SCANCODE_Q;
 140   IK_E       = SDL_SCANCODE_E;
 141   IK_H       = SDL_SCANCODE_H;
 142   IK_J       = SDL_SCANCODE_J;
 143   IK_T       = SDL_SCANCODE_T;
 144   IK_Z       = SDL_SCANCODE_Z;
 145   IK_MINUS   = SDL_SCANCODE_MINUS;
 146   // TODO: think of something better than this shit
 147   IK_LASTKEY = SDL_NUM_SCANCODES-1;
 148
 149   VK_FIRSTKEY = e_MaxKbdKeys + e_MaxJoys*e_MaxJoyKeys;
 150   VK_LEFT     = VK_FIRSTKEY + 0;
 151   VK_RIGHT    = VK_FIRSTKEY + 1;
 152   VK_UP       = VK_FIRSTKEY + 2;
 153   VK_DOWN     = VK_FIRSTKEY + 3;
 154   VK_FIRE     = VK_FIRSTKEY + 4;
 155   VK_OPEN     = VK_FIRSTKEY + 5;
 156   VK_JUMP     = VK_FIRSTKEY + 6;
 157   VK_CHAT     = VK_FIRSTKEY + 7;
 158   VK_ESCAPE   = VK_FIRSTKEY + 8;
 159   VK_0        = VK_FIRSTKEY + 9;
 160   VK_1        = VK_FIRSTKEY + 10;
 161   VK_2        = VK_FIRSTKEY + 11;
 162   VK_3        = VK_FIRSTKEY + 12;
 163   VK_4        = VK_FIRSTKEY + 13;
 164   VK_5        = VK_FIRSTKEY + 14;
 165   VK_6        = VK_FIRSTKEY + 15;
 166   VK_7        = VK_FIRSTKEY + 16;
 167   VK_8        = VK_FIRSTKEY + 17;
 168   VK_9        = VK_FIRSTKEY + 18;
 169   VK_A        = VK_FIRSTKEY + 19;
 170   VK_B        = VK_FIRSTKEY + 20;
 171   VK_C        = VK_FIRSTKEY + 21;
 172   VK_D        = VK_FIRSTKEY + 22;
 173   VK_E        = VK_FIRSTKEY + 23;
 174   VK_F        = VK_FIRSTKEY + 24;
 175   VK_CONSOLE  = VK_FIRSTKEY + 25;
 176   VK_STATUS   = VK_FIRSTKEY + 26;
 177   VK_TEAM     = VK_FIRSTKEY + 27;
 178   VK_PREV     = VK_FIRSTKEY + 28;
 179   VK_NEXT     = VK_FIRSTKEY + 29;
 180   VK_STRAFE   = VK_FIRSTKEY + 30;
 181   VK_LSTRAFE  = VK_FIRSTKEY + 31;
 182   VK_RSTRAFE  = VK_FIRSTKEY + 32;
 183   VK_PRINTSCR = VK_FIRSTKEY + 33;
 184   VK_SHOWKBD  = VK_FIRSTKEY + 34;
 185   VK_HIDEKBD  = VK_FIRSTKEY + 35;
 186   VK_LASTKEY  = e_MaxKbdKeys + e_MaxJoys*e_MaxJoyKeys + e_MaxVirtKeys - 1;
 187
 188   AX_MINUS  = 0;
 189   AX_PLUS   = 1;
 190   HAT_LEFT  = 0;
 191   HAT_UP    = 1;
 192   HAT_RIGHT = 2;
 193   HAT_DOWN  = 3;
 194
 195   JOY0_ATTACK = JOYK_BEG + 0*e_MaxJoyBtns + 0;
 196   JOY1_ATTACK = JOYK_BEG + 1*e_MaxJoyBtns + 0;
 197   JOY2_ATTACK = JOYK_BEG + 2*e_MaxJoyBtns + 0;
 198   JOY3_ATTACK = JOYK_BEG + 3*e_MaxJoyBtns + 0;
 199   JOY0_NEXT = JOYK_BEG + 0*e_MaxJoyBtns + 1;
 200   JOY1_NEXT = JOYK_BEG + 1*e_MaxJoyBtns + 1;
 201   JOY2_NEXT = JOYK_BEG + 2*e_MaxJoyBtns + 1;
 202   JOY3_NEXT = JOYK_BEG + 3*e_MaxJoyBtns + 1;
 203   JOY0_JUMP = JOYK_BEG + 0*e_MaxJoyBtns + 2;
 204   JOY1_JUMP = JOYK_BEG + 1*e_MaxJoyBtns + 2;
 205   JOY2_JUMP = JOYK_BEG + 2*e_MaxJoyBtns + 2;
 206   JOY3_JUMP = JOYK_BEG + 3*e_MaxJoyBtns + 2;
 207   JOY0_ACTIVATE = JOYK_BEG + 0*e_MaxJoyBtns + 3;
 208   JOY1_ACTIVATE = JOYK_BEG + 1*e_MaxJoyBtns + 3;
 209   JOY2_ACTIVATE = JOYK_BEG + 2*e_MaxJoyBtns + 3;
 210   JOY3_ACTIVATE = JOYK_BEG + 3*e_MaxJoyBtns + 3;
 211   JOY0_PREV = JOYK_BEG + 0*e_MaxJoyBtns + 4;
 212   JOY1_PREV = JOYK_BEG + 1*e_MaxJoyBtns + 4;
 213   JOY2_PREV = JOYK_BEG + 2*e_MaxJoyBtns + 4;
 214   JOY3_PREV = JOYK_BEG + 3*e_MaxJoyBtns + 4;
 215
 216   JOY0_LEFT = JOYA_BEG + 0*e_MaxJoyAxes*2 + 0*2 + AX_MINUS;
 217   JOY1_LEFT = JOYA_BEG + 1*e_MaxJoyAxes*2 + 0*2 + AX_MINUS;
 218   JOY2_LEFT = JOYA_BEG + 2*e_MaxJoyAxes*2 + 0*2 + AX_MINUS;
 219   JOY3_LEFT = JOYA_BEG + 3*e_MaxJoyAxes*2 + 0*2 + AX_MINUS;
 220   JOY0_RIGHT = JOYA_BEG + 0*e_MaxJoyAxes*2 + 0*2 + AX_PLUS;
 221   JOY1_RIGHT = JOYA_BEG + 1*e_MaxJoyAxes*2 + 0*2 + AX_PLUS;
 222   JOY2_RIGHT = JOYA_BEG + 2*e_MaxJoyAxes*2 + 0*2 + AX_PLUS;
 223   JOY3_RIGHT = JOYA_BEG + 3*e_MaxJoyAxes*2 + 0*2 + AX_PLUS;
 224   JOY0_UP = JOYA_BEG + 0*e_MaxJoyAxes*2 + 1*2 + AX_MINUS;
 225   JOY1_UP = JOYA_BEG + 1*e_MaxJoyAxes*2 + 1*2 + AX_MINUS;
 226   JOY2_UP = JOYA_BEG + 2*e_MaxJoyAxes*2 + 1*2 + AX_MINUS;
 227   JOY3_UP = JOYA_BEG + 3*e_MaxJoyAxes*2 + 1*2 + AX_MINUS;
 228   JOY0_DOWN = JOYA_BEG + 0*e_MaxJoyAxes*2 + 1*2 + AX_PLUS;
 229   JOY1_DOWN = JOYA_BEG + 1*e_MaxJoyAxes*2 + 1*2 + AX_PLUS;
 230   JOY2_DOWN = JOYA_BEG + 2*e_MaxJoyAxes*2 + 1*2 + AX_PLUS;
 231   JOY3_DOWN = JOYA_BEG + 3*e_MaxJoyAxes*2 + 1*2 + AX_PLUS;
 232
 233 function  e_InitInput: Boolean;
 234 procedure e_ReleaseInput;
 235 procedure e_UnpressAllKeys;
 236 procedure e_KeyUpDown (key: Integer; down: Boolean);
 237
 238 function  e_KeyPressed (key: Integer): Boolean;
 239 function  e_AnyKeyPressed: Boolean;
 240 function  e_GetFirstKeyPressed: Integer;
 241 function  e_HasJoysticks: Boolean;
 242
 243 function  e_JoyButtonToKey (id, btn: Integer): Integer;
 244 function  e_JoyAxisToKey (id, ax, dir: Integer): Integer;
 245 function  e_JoyHatToKey (id, hat, dir: Integer): Integer;
 246
 247 var
 248   e_JoystickAvailable: array [0..e_MaxJoys - 1] of Boolean;
 249   e_JoystickDeadzones: array [0..e_MaxJoys - 1] of Integer = (8192, 8192, 8192, 8192);
 250   e_KeyNames: array [0..e_MaxInputKeys] of String;
 251
 252 implementation
 253
 254 var
 255   InputBuffer: array [0..e_MaxInputKeys - 1] of Boolean;
 256
 257 procedure e_UnpressAllKeys;
 258   var i: Integer;
 259 begin
 260   for i := 0 to High(InputBuffer) do
 261     InputBuffer[i] := False
 262 end;
 263
 264 procedure e_KeyUpDown (key: Integer; down: Boolean);
 265 begin
 266   ASSERT(key >= 0);
 267   ASSERT(key < e_MaxInputKeys);
 268   if key > 0 then
 269     InputBuffer[key] := down
 270 end;
 271
 272 procedure GenerateKeyNames;
 273   var i, j, k: Integer;
 274 begin
 275   // keyboard key names
 276   e_KeyNames[IK_0] := '0';
 277   e_KeyNames[IK_1] := '1';
 278   e_KeyNames[IK_2] := '2';
 279   e_KeyNames[IK_3] := '3';
 280   e_KeyNames[IK_4] := '4';
 281   e_KeyNames[IK_5] := '5';
 282   e_KeyNames[IK_6] := '6';
 283   e_KeyNames[IK_7] := '7';
 284   e_KeyNames[IK_8] := '8';
 285   e_KeyNames[IK_9] := '9';
 286
 287   for i := IK_A to IK_Z do
 288     e_KeyNames[i] := '' + chr(ord('a') + (i - IK_a));
 289
 290   e_KeyNames[IK_ESCAPE] := 'ESCAPE';
 291   e_KeyNames[IK_ENTER] := 'ENTER';
 292   e_KeyNames[IK_TAB] := 'TAB';
 293   e_KeyNames[IK_BACKSPACE] := 'BACKSPACE';
 294   e_KeyNames[IK_SPACE] := 'SPACE';
 295   e_KeyNames[IK_UP] := 'UP';
 296   e_KeyNames[IK_LEFT] := 'LEFT';
 297   e_KeyNames[IK_RIGHT] := 'RIGHT';
 298   e_KeyNames[IK_DOWN] := 'DOWN';
 299   e_KeyNames[IK_INSERT] := 'INSERT';
 300   e_KeyNames[IK_DELETE] := 'DELETE';
 301   e_KeyNames[IK_HOME] := 'HOME';
 302   e_KeyNames[IK_END] := 'END';
 303   e_KeyNames[IK_PAGEUP] := 'PGUP';
 304   e_KeyNames[IK_PAGEDN] := 'PGDOWN';
 305   e_KeyNames[IK_KPINSERT] := 'PAD0';
 306   e_KeyNames[IK_KPEND] := 'PAD1';
 307   e_KeyNames[IK_KPDOWN] := 'PAD2';
 308   e_KeyNames[IK_KPPAGEDN] := 'PAD3';
 309   e_KeyNames[IK_KPLEFT] := 'PAD4';
 310   e_KeyNames[IK_KP5] := 'PAD5';
 311   e_KeyNames[IK_KPRIGHT] := 'PAD6';
 312   e_KeyNames[IK_KPHOME] := 'PAD7';
 313   e_KeyNames[IK_KPUP] := 'PAD8';
 314   e_KeyNames[IK_KPPAGEUP] := 'PAD9';
 315   e_KeyNames[IK_NUMLOCK] := 'NUM';
 316   e_KeyNames[IK_KPDIVIDE] := 'PAD/';
 317   e_KeyNames[IK_KPMULTIPLE] := 'PAD*';
 318   e_KeyNames[IK_KPMINUS] := 'PAD-';
 319   e_KeyNames[IK_KPPLUS] := 'PAD+';
 320   e_KeyNames[IK_KPENTER] := 'PADENTER';
 321   e_KeyNames[IK_KPDOT] := 'PAD.';
 322   e_KeyNames[IK_CAPSLOCK] := 'CAPS';
 323   e_KeyNames[IK_BACKQUOTE] := 'BACKQUOTE';
 324   e_KeyNames[IK_F1] := 'F1';
 325   e_KeyNames[IK_F2] := 'F2';
 326   e_KeyNames[IK_F3] := 'F3';
 327   e_KeyNames[IK_F4] := 'F4';
 328   e_KeyNames[IK_F5] := 'F5';
 329   e_KeyNames[IK_F6] := 'F6';
 330   e_KeyNames[IK_F7] := 'F7';
 331   e_KeyNames[IK_F8] := 'F8';
 332   e_KeyNames[IK_F9] := 'F9';
 333   e_KeyNames[IK_F10] := 'F10';
 334   e_KeyNames[IK_F11] := 'F11';
 335   e_KeyNames[IK_F12] := 'F12';
 336   e_KeyNames[IK_SHIFT] := 'LSHIFT';
 337   e_KeyNames[IK_RSHIFT] := 'RSHIFT';
 338   e_KeyNames[IK_CTRL] := 'LCTRL';
 339   e_KeyNames[IK_RCTRL] := 'RCTRL';
 340   e_KeyNames[IK_ALT] := 'LALT';
 341   e_KeyNames[IK_RALT] := 'RALT';
 342   e_KeyNames[IK_WIN] := 'LWIN';
 343   e_KeyNames[IK_RWIN] := 'RWIN';
 344   e_KeyNames[IK_MENU] := 'MENU';
 345   e_KeyNames[IK_PRINTSCR] := 'PSCRN';
 346   e_KeyNames[IK_SCROLLLOCK] := 'SCROLL';
 347   e_KeyNames[IK_PAUSE] := 'PAUSE';
 348   e_KeyNames[IK_LBRACKET] := '[';
 349   e_KeyNames[IK_RBRACKET] := ']';
 350   e_KeyNames[IK_SEMICOLON] := ';';
 351   e_KeyNames[IK_QUOTE] := '''';
 352   e_KeyNames[IK_BACKSLASH] := '\';
 353   e_KeyNames[IK_SLASH] := '/';
 354   e_KeyNames[IK_COMMA] := ',';
 355   e_KeyNames[IK_DOT] := '.';
 356   e_KeyNames[IK_MINUS] := '-';
 357   e_KeyNames[IK_EQUALS] := '=';
 358
 359   // joysticks
 360   for j := 0 to e_MaxJoys-1 do
 361   begin
 362     k := JOYK_BEG + j * e_MaxJoyBtns;
 363     // buttons
 364     for i := 0 to e_MaxJoyBtns-1 do
 365       e_KeyNames[k + i] := Format('JOY%dB%d', [j, i]);
 366     k := JOYA_BEG + j * e_MaxJoyAxes * 2;
 367     // axes
 368     for i := 0 to e_MaxJoyAxes-1 do
 369     begin
 370       e_KeyNames[k + i*2    ] := Format('JOY%dA%d+', [j, i]);
 371       e_KeyNames[k + i*2 + 1] := Format('JOY%dA%d-', [j, i]);
 372     end;
 373     k := JOYH_BEG + j * e_MaxJoyHats * 4;
 374     // hats
 375     for i := 0 to e_MaxJoyHats-1 do
 376     begin
 377       e_KeyNames[k + i*4    ] := Format('JOY%dD%dL', [j, i]);
 378       e_KeyNames[k + i*4 + 1] := Format('JOY%dD%dU', [j, i]);
 379       e_KeyNames[k + i*4 + 2] := Format('JOY%dD%dR', [j, i]);
 380       e_KeyNames[k + i*4 + 3] := Format('JOY%dD%dD', [j, i]);
 381     end;
 382   end;
 383
 384   // vitrual keys
 385   for i := 0 to e_MaxVirtKeys-1 do
 386     e_KeyNames[VIRT_BEG + i] := 'VIRTUAL' + IntToStr(i);
 387 end;
 388
 389 function e_HasJoysticks: Boolean;
 390   var i: Integer;
 391 begin
 392   i := 0;
 393   while (i < e_MaxJoys) and (e_JoystickAvailable[i] = False) do inc(i);
 394   result := i < e_MaxJoys
 395 end;
 396
 397 function e_InitInput: Boolean;
 398   var i: Integer;
 399 begin
 400   for i := 0 to e_MaxJoys - 1 do
 401     e_JoystickAvailable[i] := False;
 402   GenerateKeyNames;
 403   result := True
 404 end;
 405
 406 procedure e_ReleaseInput;
 407   var i: Integer;
 408 begin
 409   for i := 0 to e_MaxJoys - 1 do
 410     e_JoystickAvailable[i] := False
 411 end;
 412
 413 function e_KeyPressed (key: Integer): Boolean;
 414 begin
 415   ASSERT(key >= 0);
 416   ASSERT(key < e_MaxInputKeys);
 417   result := InputBuffer[key]
 418 end;
 419
 420 function e_AnyKeyPressed: Boolean;
 421 begin
 422   result := e_GetFirstKeyPressed <> IK_INVALID;
 423 end;
 424
 425 function e_GetFirstKeyPressed: Integer;
 426   var i: Integer;
 427 begin
 428   i := 1;
 429   while (i < e_MaxInputKeys) and (InputBuffer[i] = False) do inc(i);
 430   if i < e_MaxInputKeys then
 431     result := i
 432   else
 433     result := IK_INVALID
 434 end;
 435
 436 function e_JoyButtonToKey (id, btn: Integer): Integer;
 437 begin
 438   ASSERT(id >= 0);
 439   ASSERT(id < e_MaxJoys);
 440   ASSERT(btn >= 0);
 441   ASSERT(btn < e_MaxJoyBtns);
 442   result := JOYK_BEG + id*e_MaxJoyBtns + btn
 443 end;
 444
 445 function e_JoyAxisToKey (id, ax, dir: Integer): Integer;
 446 begin
 447   ASSERT(id >= 0);
 448   ASSERT(id < e_MaxJoys);
 449   ASSERT(ax >= 0);
 450   ASSERT(ax < e_MaxJoyAxes);
 451   ASSERT(dir in [AX_MINUS, AX_PLUS]);
 452   result := JOYA_BEG + id*e_MaxJoyAxes*2 + ax*2 + dir
 453 end;
 454
 455 function e_JoyHatToKey (id, hat, dir: Integer): Integer;
 456 begin
 457   ASSERT(id >= 0);
 458   ASSERT(id < e_MaxJoys);
 459   ASSERT(hat >= 0);
 460   ASSERT(hat < e_MaxJoyHats);
 461   ASSERT(dir in [HAT_LEFT, HAT_UP, HAT_RIGHT, HAT_DOWN]);
 462   result := JOYH_BEG + id*e_MaxJoyHats*4 + hat*4 + dir
 463 end;
 464
 465 end.