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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 {$MODE DELPHI}
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 var
109 {e_MouseInfo: TMouseInfo;}
110 e_EnableInput: Boolean = False;
111 e_JoysticksAvailable: Byte = 0;
112 e_JoystickDeadzones: array [0..e_MaxJoys-1] of Integer = (8192, 8192, 8192, 8192);
113 e_KeyNames: array [0..e_MaxInputKeys] of String;
114
115 implementation
116
117 uses Math;
118
119 const
120 KBRD_END = e_MaxKbdKeys;
121 JOYK_BEG = KBRD_END;
122 JOYK_END = JOYK_BEG + e_MaxJoyBtns*e_MaxJoys;
123 JOYA_BEG = JOYK_END;
124 JOYA_END = JOYA_BEG + e_MaxJoyAxes*2*e_MaxJoys;
125 JOYH_BEG = JOYA_END;
126 JOYH_END = JOYH_BEG + e_MaxJoyHats*4*e_MaxJoys;
127
128 type
129 TJoystick = record
130 ID: Byte;
131 Handle: PSDL_Joystick;
132 Axes: Byte;
133 Buttons: Byte;
134 Hats: Byte;
135 ButtBuf: array [0..e_MaxJoyBtns] of Boolean;
136 AxisBuf: array [0..e_MaxJoyAxes] of Integer;
137 AxisZero: array [0..e_MaxJoyAxes] of Integer;
138 HatBuf: array [0..e_MaxJoyHats] of array [HAT_LEFT..HAT_DOWN] of Boolean;
139 end;
140
141 var
142 KeyBuffer: array [0..e_MaxKbdKeys] of Boolean;
143 Joysticks: array of TJoystick = nil;
144
145 function OpenJoysticks(): Byte;
146 var
147 i, j, k, c: Integer;
148 joy: PSDL_Joystick;
149 begin
150 Result := 0;
151 k := Min(e_MaxJoys, SDL_NumJoysticks());
152 if k = 0 then Exit;
153 c := 0;
154 for i := 0 to k do
155 begin
156 joy := SDL_JoystickOpen(i);
157 if joy <> nil then
158 begin
159 Inc(c);
160 e_WriteLog('Input: Opened SDL joystick ' + IntToStr(i) + ' (' + SDL_JoystickName(joy) +
161 ') as joystick ' + IntToStr(c) + ':', MSG_NOTIFY);
162 SetLength(Joysticks, c);
163 with Joysticks[c-1] do
164 begin
165 ID := i;
166 Handle := joy;
167 Axes := Min(e_MaxJoyAxes, SDL_JoystickNumAxes(joy));
168 Buttons := Min(e_MaxJoyBtns, SDL_JoystickNumButtons(joy));
169 Hats := Min(e_MaxJoyHats, SDL_JoystickNumHats(joy));
170 // TODO: find proper solution for this xbox trigger shit
171 for j := 0 to Axes do AxisZero[j] := SDL_JoystickGetAxis(joy, j);
172 e_WriteLog(' ' + IntToStr(Axes) + ' axes, ' + IntToStr(Buttons) + ' buttons, ' +
173 IntToStr(Hats) + ' hats.', MSG_NOTIFY);
174 end;
175 end;
176 end;
177 Result := c;
178 end;
179
180 procedure ReleaseJoysticks();
181 var
182 i: Integer;
183 begin
184 if (Joysticks = nil) or (e_JoysticksAvailable = 0) then Exit;
185 for i := Low(Joysticks) to High(Joysticks) do
186 with Joysticks[i] do
187 SDL_JoystickClose(Handle);
188 SetLength(Joysticks, 0);
189 end;
190
191 function PollKeyboard(): Boolean;
192 var
193 Keys: PByte;
194 NKeys: Integer;
195 i: Cardinal;
196 begin
197 Result := False;
198 Keys := SDL_GetKeyboardState(@NKeys);
199 if (Keys = nil) or (NKeys < 1) then
200 Exit;
201 for i := 0 to NKeys do
202 KeyBuffer[i] := ((PByte(Cardinal(Keys) + i)^) <> 0);
203 for i := NKeys to High(KeyBuffer) do
204 KeyBuffer[i] := False;
205 end;
206
207 function PollJoysticks(): Boolean;
208 var
209 i, j: Word;
210 hat: Byte;
211 begin
212 Result := False;
213 if (Joysticks = nil) or (e_JoysticksAvailable = 0) then Exit;
214 SDL_JoystickUpdate();
215 for j := Low(Joysticks) to High(Joysticks) do
216 with Joysticks[j] do
217 begin
218 for i := 0 to Buttons do
219 ButtBuf[i] := SDL_JoystickGetButton(Handle, i) <> 0;
220 for i := 0 to Axes do
221 AxisBuf[i] := SDL_JoystickGetAxis(Handle, i);
222 for i := 0 to Hats do
223 begin
224 hat := SDL_JoystickGetHat(Handle, i);
225 HatBuf[i, HAT_UP] := LongBool(hat and SDL_HAT_UP);
226 HatBuf[i, HAT_DOWN] := LongBool(hat and SDL_HAT_DOWN);
227 HatBuf[i, HAT_LEFT] := LongBool(hat and SDL_HAT_LEFT);
228 HatBuf[i, HAT_RIGHT] := LongBool(hat and SDL_HAT_RIGHT);
229 end;
230 end;
231 end;
232
233 procedure GenerateKeyNames();
234 var
235 i, j, k: LongWord;
236 begin
237 // keyboard key names
238 for i := 0 to IK_LASTKEY do
239 e_KeyNames[i] := SDL_GetScancodeName(i);
240
241 // joysticks
242 for j := 0 to e_MaxJoys-1 do
243 begin
244 k := JOYK_BEG + j * e_MaxJoyBtns;
245 // buttons
246 for i := 0 to e_MaxJoyBtns-1 do
247 e_KeyNames[k + i] := Format('JOY%d B%d', [j, i]);
248 k := JOYA_BEG + j * e_MaxJoyAxes * 2;
249 // axes
250 for i := 0 to e_MaxJoyAxes-1 do
251 begin
252 e_KeyNames[k + i*2 ] := Format('JOY%d A%d+', [j, i]);
253 e_KeyNames[k + i*2 + 1] := Format('JOY%d A%d-', [j, i]);
254 end;
255 k := JOYH_BEG + j * e_MaxJoyHats * 4;
256 // hats
257 for i := 0 to e_MaxJoyHats-1 do
258 begin
259 e_KeyNames[k + i*4 ] := Format('JOY%d D%dL', [j, i]);
260 e_KeyNames[k + i*4 + 1] := Format('JOY%d D%dU', [j, i]);
261 e_KeyNames[k + i*4 + 2] := Format('JOY%d D%dR', [j, i]);
262 e_KeyNames[k + i*4 + 3] := Format('JOY%d D%dD', [j, i]);
263 end;
264 end;
265 end;
266
267 function e_InitInput(): Boolean;
268 begin
269 Result := False;
270
271 e_JoysticksAvailable := OpenJoysticks();
272 e_EnableInput := True;
273 GenerateKeyNames();
274
275 Result := True;
276 end;
277
278 procedure e_ReleaseInput();
279 begin
280 ReleaseJoysticks();
281 e_JoysticksAvailable := 0;
282 end;
283
284 procedure e_ClearInputBuffer();
285 var
286 i, j, d: Integer;
287 begin
288 for i := Low(KeyBuffer) to High(KeyBuffer) do
289 KeyBuffer[i] := False;
290 if (Joysticks = nil) or (e_JoysticksAvailable = 0) then
291 for i := Low(Joysticks) to High(Joysticks) do
292 begin
293 for j := Low(Joysticks[i].ButtBuf) to High(Joysticks[i].ButtBuf) do
294 Joysticks[i].ButtBuf[j] := False;
295 for j := Low(Joysticks[i].AxisBuf) to High(Joysticks[i].AxisBuf) do
296 Joysticks[i].AxisBuf[j] := 0;
297 for j := Low(Joysticks[i].HatBuf) to High(Joysticks[i].HatBuf) do
298 for d := Low(Joysticks[i].HatBuf[j]) to High(Joysticks[i].HatBuf[j]) do
299 Joysticks[i].HatBuf[j, d] := False;
300 end;
301 end;
302
303 function e_PollInput(): Boolean;
304 var
305 kb, js: Boolean;
306 begin
307 kb := PollKeyboard();
308 js := PollJoysticks();
309
310 Result := kb or js;
311 end;
312
313 function e_KeyPressed(Key: Word): Boolean;
314 var
315 joyi, dir: Integer;
316 begin
317 Result := False;
318 if (Key = IK_INVALID) or (Key = 0) then Exit;
319
320 if (Key < KBRD_END) then
321 begin // Keyboard buttons/keys
322 Result := KeyBuffer[Key];
323 end
324
325 else if (Key >= JOYK_BEG) and (Key < JOYK_END) then
326 begin // Joystick buttons
327 JoyI := (Key - JOYK_BEG) div e_MaxJoyBtns;
328 if JoyI >= e_JoysticksAvailable then
329 Result := False
330 else
331 begin
332 Key := (Key - JOYK_BEG) mod e_MaxJoyBtns;
333 Result := Joysticks[JoyI].ButtBuf[Key];
334 end;
335 end
336
337 else if (Key >= JOYA_BEG) and (Key < JOYA_END) then
338 begin // Joystick axes
339 JoyI := (Key - JOYA_BEG) div (e_MaxJoyAxes*2);
340 if JoyI >= e_JoysticksAvailable then
341 Result := False
342 else
343 begin
344 Key := (Key - JOYA_BEG) mod (e_MaxJoyAxes*2);
345 dir := Key mod 2;
346 if dir = AX_MINUS then
347 Result := Joysticks[JoyI].AxisBuf[Key div 2] <
348 Joysticks[JoyI].AxisZero[Key div 2] - e_JoystickDeadzones[JoyI]
349 else
350 Result := Joysticks[JoyI].AxisBuf[Key div 2] >
351 Joysticks[JoyI].AxisZero[Key div 2] + e_JoystickDeadzones[JoyI]
352 end;
353 end
354
355 else if (Key >= JOYH_BEG) and (Key < JOYH_END) then
356 begin // Joystick hats
357 JoyI := (Key - JOYH_BEG) div (e_MaxJoyHats*4);
358 if JoyI >= e_JoysticksAvailable then
359 Result := False
360 else
361 begin
362 Key := (Key - JOYH_BEG) mod (e_MaxJoyHats*4);
363 dir := Key mod 4;
364 Result := Joysticks[JoyI].HatBuf[Key div 4, dir];
365 end;
366 end;
367 end;
368
369 procedure e_SetKeyState(key: Word; state: Integer);
370 var
371 JoyI, dir: Integer;
372 begin
373 if (Key = IK_INVALID) or (Key = 0) then Exit;
374
375 if (Key < KBRD_END) then
376 begin // Keyboard buttons/keys
377 keyBuffer[key] := (state <> 0);
378 end
379
380 else if (Key >= JOYK_BEG) and (Key < JOYK_END) then
381 begin // Joystick buttons
382 JoyI := (Key - JOYK_BEG) div e_MaxJoyBtns;
383 if JoyI >= e_JoysticksAvailable then
384 Exit
385 else
386 begin
387 Key := (Key - JOYK_BEG) mod e_MaxJoyBtns;
388 Joysticks[JoyI].ButtBuf[Key] := (state <> 0);
389 end;
390 end
391
392 else if (Key >= JOYA_BEG) and (Key < JOYA_END) then
393 begin // Joystick axes
394 JoyI := (Key - JOYA_BEG) div (e_MaxJoyAxes*2);
395 if JoyI >= e_JoysticksAvailable then
396 Exit
397 else
398 begin
399 Key := (Key - JOYA_BEG) mod (e_MaxJoyAxes*2);
400 Joysticks[JoyI].AxisBuf[Key div 2] := state;
401 end;
402 end
403
404 else if (Key >= JOYH_BEG) and (Key < JOYH_END) then
405 begin // Joystick hats
406 JoyI := (Key - JOYH_BEG) div (e_MaxJoyHats*4);
407 if JoyI >= e_JoysticksAvailable then
408 Exit
409 else
410 begin
411 Key := (Key - JOYH_BEG) mod (e_MaxJoyHats*4);
412 dir := Key mod 4;
413 Joysticks[JoyI].HatBuf[Key div 4, dir] := (state <> 0);
414 end;
415 end;
416 end;
417
418 function e_AnyKeyPressed(): Boolean;
419 var
420 k: Word;
421 begin
422 Result := False;
423
424 for k := 1 to e_MaxInputKeys do
425 if e_KeyPressed(k) then
426 begin
427 Result := True;
428 Break;
429 end;
430 end;
431
432 function e_GetFirstKeyPressed(): Word;
433 var
434 k: Word;
435 begin
436 Result := IK_INVALID;
437
438 for k := 1 to e_MaxInputKeys do
439 if e_KeyPressed(k) then
440 begin
441 Result := k;
442 Break;
443 end;
444 end;
445
446 ////////////////////////////////////////////////////////////////////////////////
447
448 function e_JoystickStateToString(mode: Integer): String;
449 begin
450 Result := '';
451 end;
452
453 function e_JoyByHandle(handle: Word): Integer;
454 var
455 i: Integer;
456 begin
457 Result := -1;
458 if Joysticks = nil then Exit;
459 for i := Low(Joysticks) to High(Joysticks) do
460 if Joysticks[i].ID = handle then
461 begin
462 Result := i;
463 Exit;
464 end;
465 end;
466
467 function e_JoyButtonToKey(id: Word; btn: Byte): Word;
468 begin
469 Result := 0;
470 if id >= Length(Joysticks) then Exit;
471 Result := JOYK_BEG + id*e_MaxJoyBtns + btn;
472 end;
473
474 function e_JoyAxisToKey(id: Word; ax: Byte; dir: Byte): Word;
475 begin
476 Result := 0;
477 if id >= Length(Joysticks) then Exit;
478 Result := JOYA_BEG + id*e_MaxJoyAxes*2 + ax*2 + dir;
479 end;
480
481 function e_JoyHatToKey(id: Word; hat: Byte; dir: Byte): Word;
482 begin
483 Result := 0;
484 if id >= Length(Joysticks) then Exit;
485 Result := JOYH_BEG + id*e_MaxJoyHats*4 + hat*4 + dir;
486 end;
487
488 end.
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