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[d2df-sdl.git] / 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
22 SysUtils,
23 e_log,
24 SDL2;
25
26 const
27 e_MaxKbdKeys = SDL_NUM_SCANCODES;
28 e_MaxJoys = 4;
29 e_MaxJoyBtns = 32;
30 e_MaxJoyAxes = 8;
31 e_MaxJoyHats = 8;
32
33 e_MaxJoyKeys = e_MaxJoyBtns + e_MaxJoyAxes*2 + e_MaxJoyHats*4;
34
35 e_MaxInputKeys = e_MaxKbdKeys + e_MaxJoys*e_MaxJoyKeys - 1;
36 // $$$..$$$ - 321 Keyboard buttons/keys
37 // $$$..$$$ - 4*32 Joystick buttons
38 // $$$..$$$ - 8*2 Joystick axes (- and +)
39 // $$$..$$$ - 4*4 Joystick hats (L U R D)
40
41 // these are apparently used in g_gui and g_game and elsewhere
42 IK_INVALID = 65535;
43 IK_ESCAPE = SDL_SCANCODE_ESCAPE;
44 IK_RETURN = SDL_SCANCODE_RETURN;
45 IK_KPRETURN= SDL_SCANCODE_KP_ENTER;
46 IK_ENTER = SDL_SCANCODE_RETURN;
47 IK_UP = SDL_SCANCODE_UP;
48 IK_KPUP = SDL_SCANCODE_KP_8;
49 IK_DOWN = SDL_SCANCODE_DOWN;
50 IK_KPDOWN = SDL_SCANCODE_KP_2;
51 IK_LEFT = SDL_SCANCODE_LEFT;
52 IK_KPLEFT = SDL_SCANCODE_KP_4;
53 IK_RIGHT = SDL_SCANCODE_RIGHT;
54 IK_KPRIGHT = SDL_SCANCODE_KP_6;
55 IK_DELETE = SDL_SCANCODE_DELETE;
56 IK_HOME = SDL_SCANCODE_HOME;
57 IK_KPHOME = SDL_SCANCODE_KP_7;
58 IK_INSERT = SDL_SCANCODE_INSERT;
59 IK_SPACE = SDL_SCANCODE_SPACE;
60 IK_CONTROL = SDL_SCANCODE_LCTRL;
61 IK_SHIFT = SDL_SCANCODE_LSHIFT;
62 IK_TAB = SDL_SCANCODE_TAB;
63 IK_PAGEUP = SDL_SCANCODE_PAGEUP;
64 IK_KPPAGEUP= SDL_SCANCODE_KP_9;
65 IK_PAGEDN = SDL_SCANCODE_PAGEDOWN;
66 IK_KPPAGEDN= SDL_SCANCODE_KP_3;
67 IK_F2 = SDL_SCANCODE_F2;
68 IK_F3 = SDL_SCANCODE_F3;
69 IK_F4 = SDL_SCANCODE_F4;
70 IK_F5 = SDL_SCANCODE_F5;
71 IK_F6 = SDL_SCANCODE_F6;
72 IK_F7 = SDL_SCANCODE_F7;
73 IK_F8 = SDL_SCANCODE_F8;
74 IK_F9 = SDL_SCANCODE_F9;
75 IK_F10 = SDL_SCANCODE_F10;
76 IK_END = SDL_SCANCODE_END;
77 IK_KPEND = SDL_SCANCODE_KP_1;
78 IK_BACKSPACE = SDL_SCANCODE_BACKSPACE;
79 IK_BACKQUOTE = SDL_SCANCODE_GRAVE;
80 IK_GRAVE = SDL_SCANCODE_GRAVE;
81 IK_PAUSE = SDL_SCANCODE_PAUSE;
82 IK_Y = SDL_SCANCODE_Y;
83 IK_N = SDL_SCANCODE_N;
84 // TODO: think of something better than this shit
85 IK_LASTKEY = SDL_NUM_SCANCODES-1;
86
87 AX_MINUS = 0;
88 AX_PLUS = 1;
89 HAT_LEFT = 0;
90 HAT_UP = 1;
91 HAT_RIGHT = 2;
92 HAT_DOWN = 3;
93
94 function e_InitInput(): Boolean;
95 procedure e_ReleaseInput();
96 procedure e_ClearInputBuffer();
97 function e_PollInput(): Boolean;
98 function e_KeyPressed(Key: Word): Boolean;
99 function e_AnyKeyPressed(): Boolean;
100 function e_GetFirstKeyPressed(): Word;
101 function e_JoystickStateToString(mode: Integer): String;
102 function e_JoyByHandle(handle: Word): Integer;
103 function e_JoyButtonToKey(id: Word; btn: Byte): Word;
104 function e_JoyAxisToKey(id: Word; ax: Byte; dir: Byte): Word;
105 function e_JoyHatToKey(id: Word; hat: Byte; dir: Byte): Word;
106 procedure e_SetKeyState(key: Word; state: Integer);
107
108 procedure e_UnpressAllKeys ();
109 procedure e_KeyUpDown (key: Word; down: Boolean);
110
111 var
112 {e_MouseInfo: TMouseInfo;}
113 e_EnableInput: Boolean = False;
114 e_JoysticksAvailable: Byte = 0;
115 e_JoystickDeadzones: array [0..e_MaxJoys-1] of Integer = (8192, 8192, 8192, 8192);
116 e_KeyNames: array [0..e_MaxInputKeys] of String;
117
118 implementation
119
120 uses Math;
121
122 const
123 KBRD_END = e_MaxKbdKeys;
124 JOYK_BEG = KBRD_END;
125 JOYK_END = JOYK_BEG + e_MaxJoyBtns*e_MaxJoys;
126 JOYA_BEG = JOYK_END;
127 JOYA_END = JOYA_BEG + e_MaxJoyAxes*2*e_MaxJoys;
128 JOYH_BEG = JOYA_END;
129 JOYH_END = JOYH_BEG + e_MaxJoyHats*4*e_MaxJoys;
130
131 type
132 TJoystick = record
133 ID: Byte;
134 Handle: PSDL_Joystick;
135 Axes: Byte;
136 Buttons: Byte;
137 Hats: Byte;
138 ButtBuf: array [0..e_MaxJoyBtns] of Boolean;
139 AxisBuf: array [0..e_MaxJoyAxes] of Integer;
140 AxisZero: array [0..e_MaxJoyAxes] of Integer;
141 HatBuf: array [0..e_MaxJoyHats] of array [HAT_LEFT..HAT_DOWN] of Boolean;
142 end;
143
144 var
145 KeyBuffer: array [0..e_MaxKbdKeys] of Boolean;
146 Joysticks: array of TJoystick = nil;
147
148 function OpenJoysticks(): Byte;
149 var
150 i, j, k, c: Integer;
151 joy: PSDL_Joystick;
152 begin
153 Result := 0;
154 k := Min(e_MaxJoys, SDL_NumJoysticks());
155 if k = 0 then Exit;
156 c := 0;
157 for i := 0 to k do
158 begin
159 joy := SDL_JoystickOpen(i);
160 if joy <> nil then
161 begin
162 Inc(c);
163 e_WriteLog('Input: Opened SDL joystick ' + IntToStr(i) + ' (' + SDL_JoystickName(joy) +
164 ') as joystick ' + IntToStr(c) + ':', MSG_NOTIFY);
165 SetLength(Joysticks, c);
166 with Joysticks[c-1] do
167 begin
168 ID := i;
169 Handle := joy;
170 Axes := Min(e_MaxJoyAxes, SDL_JoystickNumAxes(joy));
171 Buttons := Min(e_MaxJoyBtns, SDL_JoystickNumButtons(joy));
172 Hats := Min(e_MaxJoyHats, SDL_JoystickNumHats(joy));
173 // TODO: find proper solution for this xbox trigger shit
174 for j := 0 to Axes do AxisZero[j] := SDL_JoystickGetAxis(joy, j);
175 e_WriteLog(' ' + IntToStr(Axes) + ' axes, ' + IntToStr(Buttons) + ' buttons, ' +
176 IntToStr(Hats) + ' hats.', MSG_NOTIFY);
177 end;
178 end;
179 end;
180 Result := c;
181 end;
182
183 procedure ReleaseJoysticks();
184 var
185 i: Integer;
186 begin
187 if (Joysticks = nil) or (e_JoysticksAvailable = 0) then Exit;
188 for i := Low(Joysticks) to High(Joysticks) do
189 with Joysticks[i] do
190 SDL_JoystickClose(Handle);
191 SetLength(Joysticks, 0);
192 end;
193
194
195 procedure e_UnpressAllKeys ();
196 var
197 i: Integer;
198 begin
199 for i := 0 to High(KeyBuffer) do KeyBuffer[i] := False;
200 end;
201
202
203 procedure e_KeyUpDown (key: Word; down: Boolean);
204 begin
205 if (key > 0) and (key < Length(KeyBuffer)) then KeyBuffer[key] := down;
206 end;
207
208
209 function PollKeyboard(): Boolean;
210 {
211 var
212 Keys: PByte;
213 NKeys: Integer;
214 i: NativeUInt;
215 }
216 begin
217 Result := False;
218 {
219 Keys := SDL_GetKeyboardState(@NKeys);
220 if (Keys = nil) or (NKeys < 1) then Exit;
221 for i := 0 to NKeys do
222 begin
223 if ((PByte(NativeUInt(Keys) + i)^) <> 0) then KeyBuffer[i] := false;
224 end;
225 for i := NKeys to High(KeyBuffer) do KeyBuffer[i] := False;
226 }
227 end;
228
229 function PollJoysticks(): Boolean;
230 var
231 i, j: Word;
232 hat: Byte;
233 begin
234 Result := False;
235 if (Joysticks = nil) or (e_JoysticksAvailable = 0) then Exit;
236 SDL_JoystickUpdate();
237 for j := Low(Joysticks) to High(Joysticks) do
238 with Joysticks[j] do
239 begin
240 for i := 0 to Buttons do
241 ButtBuf[i] := SDL_JoystickGetButton(Handle, i) <> 0;
242 for i := 0 to Axes do
243 AxisBuf[i] := SDL_JoystickGetAxis(Handle, i);
244 for i := 0 to Hats do
245 begin
246 hat := SDL_JoystickGetHat(Handle, i);
247 HatBuf[i, HAT_UP] := LongBool(hat and SDL_HAT_UP);
248 HatBuf[i, HAT_DOWN] := LongBool(hat and SDL_HAT_DOWN);
249 HatBuf[i, HAT_LEFT] := LongBool(hat and SDL_HAT_LEFT);
250 HatBuf[i, HAT_RIGHT] := LongBool(hat and SDL_HAT_RIGHT);
251 end;
252 end;
253 end;
254
255 procedure GenerateKeyNames();
256 var
257 i, j, k: LongWord;
258 begin
259 // keyboard key names
260 for i := 0 to IK_LASTKEY do
261 e_KeyNames[i] := SDL_GetScancodeName(i);
262
263 // joysticks
264 for j := 0 to e_MaxJoys-1 do
265 begin
266 k := JOYK_BEG + j * e_MaxJoyBtns;
267 // buttons
268 for i := 0 to e_MaxJoyBtns-1 do
269 e_KeyNames[k + i] := Format('JOY%d B%d', [j, i]);
270 k := JOYA_BEG + j * e_MaxJoyAxes * 2;
271 // axes
272 for i := 0 to e_MaxJoyAxes-1 do
273 begin
274 e_KeyNames[k + i*2 ] := Format('JOY%d A%d+', [j, i]);
275 e_KeyNames[k + i*2 + 1] := Format('JOY%d A%d-', [j, i]);
276 end;
277 k := JOYH_BEG + j * e_MaxJoyHats * 4;
278 // hats
279 for i := 0 to e_MaxJoyHats-1 do
280 begin
281 e_KeyNames[k + i*4 ] := Format('JOY%d D%dL', [j, i]);
282 e_KeyNames[k + i*4 + 1] := Format('JOY%d D%dU', [j, i]);
283 e_KeyNames[k + i*4 + 2] := Format('JOY%d D%dR', [j, i]);
284 e_KeyNames[k + i*4 + 3] := Format('JOY%d D%dD', [j, i]);
285 end;
286 end;
287 end;
288
289 function e_InitInput(): Boolean;
290 begin
291 Result := False;
292
293 e_JoysticksAvailable := OpenJoysticks();
294 e_EnableInput := True;
295 GenerateKeyNames();
296
297 Result := True;
298 end;
299
300 procedure e_ReleaseInput();
301 begin
302 ReleaseJoysticks();
303 e_JoysticksAvailable := 0;
304 end;
305
306 procedure e_ClearInputBuffer();
307 var
308 i, j, d: Integer;
309 begin
310 for i := Low(KeyBuffer) to High(KeyBuffer) do
311 KeyBuffer[i] := False;
312 if (Joysticks = nil) or (e_JoysticksAvailable = 0) then
313 for i := Low(Joysticks) to High(Joysticks) do
314 begin
315 for j := Low(Joysticks[i].ButtBuf) to High(Joysticks[i].ButtBuf) do
316 Joysticks[i].ButtBuf[j] := False;
317 for j := Low(Joysticks[i].AxisBuf) to High(Joysticks[i].AxisBuf) do
318 Joysticks[i].AxisBuf[j] := 0;
319 for j := Low(Joysticks[i].HatBuf) to High(Joysticks[i].HatBuf) do
320 for d := Low(Joysticks[i].HatBuf[j]) to High(Joysticks[i].HatBuf[j]) do
321 Joysticks[i].HatBuf[j, d] := False;
322 end;
323 end;
324
325 function e_PollInput(): Boolean;
326 var
327 kb, js: Boolean;
328 begin
329 kb := PollKeyboard();
330 js := PollJoysticks();
331
332 Result := kb or js;
333 end;
334
335 function e_KeyPressed(Key: Word): Boolean;
336 var
337 joyi, dir: Integer;
338 begin
339 Result := False;
340 if (Key = IK_INVALID) or (Key = 0) then Exit;
341
342 if (Key < KBRD_END) then
343 begin // Keyboard buttons/keys
344 Result := KeyBuffer[Key];
345 end
346
347 else if (Key >= JOYK_BEG) and (Key < JOYK_END) then
348 begin // Joystick buttons
349 JoyI := (Key - JOYK_BEG) div e_MaxJoyBtns;
350 if JoyI >= e_JoysticksAvailable then
351 Result := False
352 else
353 begin
354 Key := (Key - JOYK_BEG) mod e_MaxJoyBtns;
355 Result := Joysticks[JoyI].ButtBuf[Key];
356 end;
357 end
358
359 else if (Key >= JOYA_BEG) and (Key < JOYA_END) then
360 begin // Joystick axes
361 JoyI := (Key - JOYA_BEG) div (e_MaxJoyAxes*2);
362 if JoyI >= e_JoysticksAvailable then
363 Result := False
364 else
365 begin
366 Key := (Key - JOYA_BEG) mod (e_MaxJoyAxes*2);
367 dir := Key mod 2;
368 if dir = AX_MINUS then
369 Result := Joysticks[JoyI].AxisBuf[Key div 2] <
370 Joysticks[JoyI].AxisZero[Key div 2] - e_JoystickDeadzones[JoyI]
371 else
372 Result := Joysticks[JoyI].AxisBuf[Key div 2] >
373 Joysticks[JoyI].AxisZero[Key div 2] + e_JoystickDeadzones[JoyI]
374 end;
375 end
376
377 else if (Key >= JOYH_BEG) and (Key < JOYH_END) then
378 begin // Joystick hats
379 JoyI := (Key - JOYH_BEG) div (e_MaxJoyHats*4);
380 if JoyI >= e_JoysticksAvailable then
381 Result := False
382 else
383 begin
384 Key := (Key - JOYH_BEG) mod (e_MaxJoyHats*4);
385 dir := Key mod 4;
386 Result := Joysticks[JoyI].HatBuf[Key div 4, dir];
387 end;
388 end;
389 end;
390
391 procedure e_SetKeyState(key: Word; state: Integer);
392 var
393 JoyI, dir: Integer;
394 begin
395 if (Key = IK_INVALID) or (Key = 0) then Exit;
396
397 if (Key < KBRD_END) then
398 begin // Keyboard buttons/keys
399 keyBuffer[key] := (state <> 0);
400 end
401
402 else if (Key >= JOYK_BEG) and (Key < JOYK_END) then
403 begin // Joystick buttons
404 JoyI := (Key - JOYK_BEG) div e_MaxJoyBtns;
405 if JoyI >= e_JoysticksAvailable then
406 Exit
407 else
408 begin
409 Key := (Key - JOYK_BEG) mod e_MaxJoyBtns;
410 Joysticks[JoyI].ButtBuf[Key] := (state <> 0);
411 end;
412 end
413
414 else if (Key >= JOYA_BEG) and (Key < JOYA_END) then
415 begin // Joystick axes
416 JoyI := (Key - JOYA_BEG) div (e_MaxJoyAxes*2);
417 if JoyI >= e_JoysticksAvailable then
418 Exit
419 else
420 begin
421 Key := (Key - JOYA_BEG) mod (e_MaxJoyAxes*2);
422 Joysticks[JoyI].AxisBuf[Key div 2] := state;
423 end;
424 end
425
426 else if (Key >= JOYH_BEG) and (Key < JOYH_END) then
427 begin // Joystick hats
428 JoyI := (Key - JOYH_BEG) div (e_MaxJoyHats*4);
429 if JoyI >= e_JoysticksAvailable then
430 Exit
431 else
432 begin
433 Key := (Key - JOYH_BEG) mod (e_MaxJoyHats*4);
434 dir := Key mod 4;
435 Joysticks[JoyI].HatBuf[Key div 4, dir] := (state <> 0);
436 end;
437 end;
438 end;
439
440 function e_AnyKeyPressed(): Boolean;
441 var
442 k: Word;
443 begin
444 Result := False;
445
446 for k := 1 to e_MaxInputKeys do
447 if e_KeyPressed(k) then
448 begin
449 Result := True;
450 Break;
451 end;
452 end;
453
454 function e_GetFirstKeyPressed(): Word;
455 var
456 k: Word;
457 begin
458 Result := IK_INVALID;
459
460 for k := 1 to e_MaxInputKeys do
461 if e_KeyPressed(k) then
462 begin
463 Result := k;
464 Break;
465 end;
466 end;
467
468 ////////////////////////////////////////////////////////////////////////////////
469
470 function e_JoystickStateToString(mode: Integer): String;
471 begin
472 Result := '';
473 end;
474
475 function e_JoyByHandle(handle: Word): Integer;
476 var
477 i: Integer;
478 begin
479 Result := -1;
480 if Joysticks = nil then Exit;
481 for i := Low(Joysticks) to High(Joysticks) do
482 if Joysticks[i].ID = handle then
483 begin
484 Result := i;
485 Exit;
486 end;
487 end;
488
489 function e_JoyButtonToKey(id: Word; btn: Byte): Word;
490 begin
491 Result := 0;
492 if id >= Length(Joysticks) then Exit;
493 Result := JOYK_BEG + id*e_MaxJoyBtns + btn;
494 end;
495
496 function e_JoyAxisToKey(id: Word; ax: Byte; dir: Byte): Word;
497 begin
498 Result := 0;
499 if id >= Length(Joysticks) then Exit;
500 Result := JOYA_BEG + id*e_MaxJoyAxes*2 + ax*2 + dir;
501 end;
502
503 function e_JoyHatToKey(id: Word; hat: Byte; dir: Byte): Word;
504 begin
505 Result := 0;
506 if id >= Length(Joysticks) then Exit;
507 Result := JOYH_BEG + id*e_MaxJoyHats*4 + hat*4 + dir;
508 end;
509
510 end.
[MIRROR] a port of Doom 2D Forever to FPC/SDL
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