src/game/sdl/g_system.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, version 3 of the License ONLY.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14  *)
  15 {$INCLUDE ../shared/a_modes.inc}
  16 unit g_system;
  17
  18 interface
  19
  20   uses Utils;
  21
  22   (* --- Utils --- *)
  23   function sys_GetTicks (): Int64;
  24   procedure sys_Delay (ms: Integer);
  25
  26   (* --- Graphics --- *)
  27   function sys_GetDisplayModes (bpp: Integer): SSArray;
  28   function sys_SetDisplayMode (w, h, bpp: Integer; fullscreen, maximized: Boolean): Boolean;
  29   procedure sys_EnableVSync (yes: Boolean);
  30   procedure sys_Repaint;
  31
  32   (* --- Input --- *)
  33   function sys_HandleInput (): Boolean;
  34   procedure sys_RequestQuit;
  35
  36   (* --- Init --- *)
  37   procedure sys_Init;
  38   procedure sys_Final;
  39
  40 implementation
  41
  42   uses
  43     SysUtils, SDL, Math,
  44     {$INCLUDE ../nogl/noGLuses.inc}
  45     e_log, e_graphics, e_input, e_sound,
  46     g_options, g_window, g_console, g_game, g_menu, g_gui, g_main, g_basic;
  47
  48   const
  49     GameTitle = 'Doom 2D: Forever (SDL 1.2, %s)';
  50
  51   var
  52     userResize: Boolean;
  53     modeResize: Integer;
  54     screen: PSDL_Surface;
  55     JoystickHandle: array [0..e_MaxJoys - 1] of PSDL_Joystick;
  56     JoystickHatState: array [0..e_MaxJoys - 1, 0..e_MaxJoyHats - 1, HAT_LEFT..HAT_DOWN] of Boolean;
  57     JoystickZeroAxes: array [0..e_MaxJoys - 1, 0..e_MaxJoyAxes - 1] of Integer;
  58
  59   (* --------- Utils --------- *)
  60
  61   function sys_GetTicks (): Int64;
  62   begin
  63     result := SDL_GetTicks()
  64   end;
  65
  66   procedure sys_Delay (ms: Integer);
  67   begin
  68     SDL_Delay(ms)
  69   end;
  70
  71   (* --------- Graphics --------- *)
  72
  73   procedure UpdateSize (w, h: Integer);
  74   begin
  75     gWinSizeX := w;
  76     gWinSizeY := h;
  77     gRC_Width := w;
  78     gRC_Height := h;
  79     if glRenderToFBO then
  80     begin
  81       // store real window size in gWinSize, downscale resolution now
  82       w := round(w / r_pixel_scale);
  83       h := round(h / r_pixel_scale);
  84       e_ResizeFramebuffer(w, h);
  85     end;
  86     gScreenWidth := w;
  87     gScreenHeight := h;
  88     {$IFDEF ENABLE_HOLMES}
  89       fuiScrWdt := w;
  90       fuiScrHgt := h;
  91     {$ENDIF}
  92     e_ResizeWindow(w, h);
  93     e_InitGL;
  94     g_Game_SetupScreenSize;
  95     g_Menu_Reset;
  96     g_Game_ClearLoading;
  97   end;
  98
  99   function GetTitle (): PChar;
 100     var info: AnsiString;
 101   begin
 102     info := g_GetBuildHash(false);
 103     if info = 'custom build' then
 104       info := info + ' by ' + g_GetBuilderName() + ' ' + GAME_BUILDDATE + ' ' + GAME_BUILDTIME;
 105     result := PChar(Format(GameTitle, [info]))
 106   end;
 107
 108   function InitWindow (w, h, bpp: Integer; fullScreen: Boolean): Boolean;
 109     var flags: Uint32;
 110   begin
 111     e_LogWritefln('InitWindow %s %s %s %s', [w, h, bpp, fullScreen]);
 112     result := false;
 113     SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
 114     SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
 115     SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
 116     SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 117     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 118     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8); // lights; it is enough to have 1-bit stencil buffer for lighting, but...
 119     flags := SDL_OPENGL;
 120     if fullScreen then flags := flags or SDL_FULLSCREEN;
 121     if userResize then flags := flags or SDL_VIDEORESIZE;
 122     if (screen = nil) or (SDL_VideoModeOk(w, h, bpp, flags) <> 0) then
 123     begin
 124       SDL_FreeSurface(screen);
 125       screen := SDL_SetVideoMode(w, h, bpp, flags);
 126       if screen <> nil then
 127       begin
 128         {$IFDEF NOGL_INIT}
 129         nogl_Init;
 130         if (not nogl_ExtensionSupported('GL_OES_framebuffer_object')) and glRenderToFBO then
 131         {$ELSE}
 132         if (not Load_GL_ARB_framebuffer_object()) and glRenderToFBO then
 133         {$ENDIF}
 134         begin
 135           e_LogWriteln('SDL: no framebuffer object support detected');
 136           glRenderToFBO := False
 137         end;
 138         SDL_WM_SetCaption(GetTitle(), nil);
 139         gFullScreen := fullscreen;
 140         gRC_FullScreen := fullscreen;
 141         UpdateSize(w, h);
 142         result := True
 143       end
 144     end
 145     else
 146     begin
 147       e_LogWritefln('SDL: video mode not supported', [])
 148     end
 149   end;
 150
 151   procedure sys_Repaint;
 152   begin
 153     if glRenderToFBO then
 154       e_BlitFramebuffer(gWinSizeX, gWinSizeY);
 155     SDL_GL_SwapBuffers
 156   end;
 157
 158   procedure sys_EnableVSync (yes: Boolean);
 159   begin
 160     (* ??? *)
 161   end;
 162
 163   function sys_GetDisplayModes (bpp: Integer): SSArray;
 164     var m: PPSDL_Rect; f: TSDL_PixelFormat; i, count: Integer;
 165   begin
 166     SetLength(result, 0);
 167     FillChar(f, sizeof(f), 0);
 168     f.palette := nil;
 169     f.BitsPerPixel := bpp;
 170     f.BytesPerPixel := (bpp + 7) div 8;
 171     m := SDL_ListModes(@f, SDL_OPENGL or SDL_FULLSCREEN);
 172     if (m <> NIL) and (UIntPtr(m) <> UIntPtr(-1)) then
 173     begin
 174       count := 0;
 175       while m[count] <> nil do inc(count);
 176       SetLength(result, count);
 177       for i := 0 to count - 1 do
 178         result[i] := IntToStr(m[i].w) + 'x' + IntToStr(m[i].h);
 179     end
 180   end;
 181
 182   function sys_SetDisplayMode (w, h, bpp: Integer; fullscreen, maximized: Boolean): Boolean;
 183   begin
 184     result := InitWindow(w, h, bpp, fullscreen)
 185   end;
 186
 187   (* --------- Joystick --------- *)
 188
 189   procedure HandleJoyButton (var ev: TSDL_JoyButtonEvent);
 190     var down: Boolean; key: Integer;
 191   begin
 192     if (ev.which < e_MaxJoys) and (ev.button < e_MaxJoyBtns) then
 193     begin
 194       key := e_JoyButtonToKey(ev.which, ev.button);
 195       down := ev.type_ = SDL_JOYBUTTONDOWN;
 196       if g_dbg_input then
 197         e_LogWritefln('Input Debug: jbutton, joy=%s, button=%s, keycode=%s, press=%s', [ev.which, ev.button, key, down]);
 198       e_KeyUpDown(key, down);
 199       g_Console_ProcessBind(key, down)
 200     end
 201     else
 202     begin
 203       if g_dbg_input then
 204       begin
 205         down := ev.type_ = SDL_JOYBUTTONDOWN;
 206         e_LogWritefln('Input Debug: NOT IN RANGE! jbutton, joy=%s, button=%s, press=%s', [ev.which, ev.button, down])
 207       end
 208     end
 209   end;
 210
 211   procedure HandleJoyAxis (var ev: TSDL_JoyAxisEvent);
 212     var key, minuskey: Integer;
 213   begin
 214     if (ev.which < e_MaxJoys) and (ev.axis < e_MaxJoyAxes) then
 215     begin
 216       key := e_JoyAxisToKey(ev.which, ev.axis, AX_PLUS);
 217       minuskey := e_JoyAxisToKey(ev.which, ev.axis, AX_MINUS);
 218
 219       if g_dbg_input then
 220           e_LogWritefln('Input Debug: jaxis, joy=%s, axis=%s, value=%s, zeroaxes=%s, deadzone=%s', [ev.which, ev.axis, ev.value, JoystickZeroAxes[ev.which, ev.axis], e_JoystickDeadzones[ev.which]]);
 221
 222       if ev.value < JoystickZeroAxes[ev.which, ev.axis] - e_JoystickDeadzones[ev.which] then
 223       begin
 224         if (e_KeyPressed(key)) then
 225         begin
 226           e_KeyUpDown(key, False);
 227           g_Console_ProcessBind(key, False)
 228         end;
 229         e_KeyUpDown(minuskey, True);
 230         g_Console_ProcessBind(minuskey, True)
 231       end
 232       else if ev.value > JoystickZeroAxes[ev.which, ev.axis] + e_JoystickDeadzones[ev.which] then
 233       begin
 234         if (e_KeyPressed(minuskey)) then
 235         begin
 236           e_KeyUpDown(minuskey, False);
 237           g_Console_ProcessBind(minuskey, False)
 238         end;
 239         e_KeyUpDown(key, True);
 240         g_Console_ProcessBind(key, True)
 241       end
 242       else
 243       begin
 244         if (e_KeyPressed(minuskey)) then
 245         begin
 246           e_KeyUpDown(minuskey, False);
 247           g_Console_ProcessBind(minuskey, False)
 248         end;
 249         if (e_KeyPressed(key)) then
 250         begin
 251           e_KeyUpDown(key, False);
 252           g_Console_ProcessBind(key, False)
 253         end
 254       end
 255     end
 256     else
 257     begin
 258       if g_dbg_input then
 259         e_LogWritefln('Input Debug: NOT IN RANGE! jaxis, joy=%s, axis=%s, value=%s, zeroaxes=%s, deadzone=%s', [ev.which, ev.axis, ev.value, JoystickZeroAxes[ev.which, ev.axis], e_JoystickDeadzones[ev.which]])
 260     end
 261   end;
 262
 263   procedure HandleJoyHat (var ev: TSDL_JoyHatEvent);
 264     var
 265       down: Boolean;
 266       i, key: Integer;
 267       hat: array [HAT_LEFT..HAT_DOWN] of Boolean;
 268   begin
 269     if (ev.which < e_MaxJoys) and (ev.hat < e_MaxJoyHats) then
 270     begin
 271       if g_dbg_input then
 272         e_LogWritefln('Input Debug: jhat, joy=%s, hat=%s, value=%s', [ev.which, ev.hat, ev.value]);
 273       hat[HAT_UP] := LongBool(ev.value and SDL_HAT_UP);
 274       hat[HAT_DOWN] := LongBool(ev.value and SDL_HAT_DOWN);
 275       hat[HAT_LEFT] := LongBool(ev.value and SDL_HAT_LEFT);
 276       hat[HAT_RIGHT] := LongBool(ev.value and SDL_HAT_RIGHT);
 277       for i := HAT_LEFT to HAT_DOWN do
 278       begin
 279         if JoystickHatState[ev.which, ev.hat, i] <> hat[i] then
 280         begin
 281           down := hat[i];
 282           key := e_JoyHatToKey(ev.which, ev.hat, i);
 283           e_KeyUpDown(key, down);
 284           g_Console_ProcessBind(key, down)
 285         end
 286       end;
 287       JoystickHatState[ev.which, ev.hat] := hat
 288     end
 289     else
 290     begin
 291       if g_dbg_input then
 292         e_LogWritefln('Input Debug: NOT IN RANGE! jhat, joy=%s, hat=%s, value=%s', [ev.which, ev.hat, ev.value])
 293     end
 294   end;
 295
 296   procedure AddJoystick (which: Integer);
 297     var i: Integer;
 298   begin
 299     assert(which < e_MaxJoys);
 300     JoystickHandle[which] := SDL_JoystickOpen(which);
 301     if JoystickHandle[which] <> nil then
 302     begin
 303       e_LogWritefln('Added Joystick %s', [which]);
 304       e_JoystickAvailable[which] := True;
 305       for i := 0 to Min(SDL_JoystickNumAxes(JoystickHandle[which]), e_MaxJoyAxes) - 1 do
 306         JoystickZeroAxes[which, i] := SDL_JoystickGetAxis(JoystickHandle[which], i)
 307     end
 308     else
 309     begin
 310       e_LogWritefln('Failed to open Joystick %s', [which])
 311     end
 312   end;
 313
 314   procedure RemoveJoystick (which: Integer);
 315   begin
 316     assert(which < e_MaxJoys);
 317     e_LogWritefln('Remove Joystick %s', [which]);
 318     e_JoystickAvailable[which] := False;
 319     if JoystickHandle[which] <> nil then
 320       SDL_JoystickClose(JoystickHandle[which]);
 321     JoystickHandle[which] := nil
 322   end;
 323
 324   (* --------- Input --------- *)
 325
 326   function Key2Stub (key: Integer): Integer;
 327     var x: Integer;
 328   begin
 329     case key of
 330       SDLK_ESCAPE: x := IK_ESCAPE;
 331       SDLK_RETURN: x := IK_RETURN;
 332       SDLK_KP_ENTER: x := IK_KPRETURN;
 333       SDLK_KP0: x := IK_KPINSERT;
 334       SDLK_UP: x := IK_UP;
 335       SDLK_KP8: x := IK_KPUP;
 336       SDLK_DOWN: x := IK_DOWN;
 337       SDLK_KP2: x := IK_KPDOWN;
 338       SDLK_LEFT: x := IK_LEFT;
 339       SDLK_KP4: x := IK_KPLEFT;
 340       SDLK_RIGHT: x := IK_RIGHT;
 341       SDLK_KP6: x := IK_KPRIGHT;
 342       SDLK_DELETE: x := IK_DELETE;
 343       SDLK_HOME: x := IK_HOME;
 344       SDLK_KP7: x := IK_KPHOME;
 345       SDLK_INSERT: x := IK_INSERT;
 346       SDLK_SPACE: x := IK_SPACE;
 347       SDLK_LSHIFT: x := IK_SHIFT;
 348       SDLK_LALT: x := IK_ALT;
 349       SDLK_TAB: x := IK_TAB;
 350       SDLK_PAGEUP: x := IK_PAGEUP;
 351       SDLK_KP9: x := IK_KPPAGEUP;
 352       SDLK_PAGEDOWN: x := IK_PAGEDN;
 353       SDLK_KP3: x := IK_KPPAGEDN;
 354       SDLK_KP5: x := IK_KP5;
 355       SDLK_NUMLOCK: x := IK_NUMLOCK;
 356       SDLK_KP_DIVIDE: x := IK_KPDIVIDE;
 357       SDLK_KP_MULTIPLY: x := IK_KPMULTIPLE;
 358       SDLK_KP_MINUS: x := IK_KPMINUS;
 359       SDLK_KP_PLUS: x := IK_KPPLUS;
 360       SDLK_KP_PERIOD: x := IK_KPDOT;
 361       SDLK_CAPSLOCK: x := IK_CAPSLOCK;
 362       SDLK_RSHIFT: x := IK_RSHIFT;
 363       SDLK_LCTRL: x := IK_CTRL;
 364       SDLK_RCTRL: x := IK_RCTRL;
 365       SDLK_RALT: x := IK_RALT;
 366       SDLK_LSUPER: x := IK_WIN;
 367       SDLK_RSUPER: x := IK_RWIN;
 368       SDLK_MENU: x := IK_MENU;
 369       SDLK_PRINT: x := IK_PRINTSCR;
 370       SDLK_SCROLLOCK: x := IK_SCROLLLOCK;
 371       SDLK_LEFTBRACKET: x := IK_LBRACKET;
 372       SDLK_RIGHTBRACKET: x := IK_RBRACKET;
 373       SDLK_SEMICOLON: x := IK_SEMICOLON;
 374       SDLK_QUOTE: x := IK_QUOTE;
 375       SDLK_BACKSLASH: x := IK_BACKSLASH;
 376       SDLK_SLASH: x := IK_SLASH;
 377       SDLK_COMMA: x := IK_COMMA;
 378       SDLK_PERIOD: x := IK_DOT;
 379       SDLK_EQUALS: x := IK_EQUALS;
 380       SDLK_0: x := IK_0;
 381       SDLK_1: x := IK_1;
 382       SDLK_2: x := IK_2;
 383       SDLK_3: x := IK_3;
 384       SDLK_4: x := IK_4;
 385       SDLK_5: x := IK_5;
 386       SDLK_6: x := IK_6;
 387       SDLK_7: x := IK_7;
 388       SDLK_8: x := IK_8;
 389       SDLK_9: x := IK_9;
 390       SDLK_F1: x := IK_F1;
 391       SDLK_F2: x := IK_F2;
 392       SDLK_F3: x := IK_F3;
 393       SDLK_F4: x := IK_F4;
 394       SDLK_F5: x := IK_F5;
 395       SDLK_F6: x := IK_F6;
 396       SDLK_F7: x := IK_F7;
 397       SDLK_F8: x := IK_F8;
 398       SDLK_F9: x := IK_F9;
 399       SDLK_F10: x := IK_F10;
 400       SDLK_F11: x := IK_F11;
 401       SDLK_F12: x := IK_F12;
 402       SDLK_END: x := IK_END;
 403       SDLK_KP1: x := IK_KPEND;
 404       SDLK_BACKSPACE: x := IK_BACKSPACE;
 405       SDLK_BACKQUOTE: x := IK_BACKQUOTE;
 406       SDLK_PAUSE: x := IK_PAUSE;
 407       SDLK_A..SDLK_Z: x := IK_A + (key - SDLK_A);
 408       SDLK_MINUS: x := IK_MINUS;
 409       SDLK_RMETA: x := IK_RMETA;
 410       SDLK_LMETA: x := IK_LMETA;
 411     else
 412       x := IK_INVALID
 413     end;
 414     result := x
 415   end;
 416
 417   procedure HandleKeyboard (var ev: TSDL_KeyboardEvent);
 418     var down, repeated: Boolean; key: Integer; ch: Char;
 419   begin
 420     key := Key2Stub(ev.keysym.sym);
 421     down := (ev.type_ = SDL_KEYDOWN);
 422     repeated := down and e_KeyPressed(key);
 423     ch := wchar2win(WideChar(ev.keysym.unicode));
 424     if g_dbg_input then
 425       e_LogWritefln('Input Debug: keysym, down=%s, sym=%s, state=%s, unicode=%s, stubsym=%s, cp1251=%s', [down, ev.keysym.sym, ev.state, ev.keysym.unicode, key, Ord(ch)]);
 426     if not repeated then
 427     begin
 428       e_KeyUpDown(key, down);
 429       g_Console_ProcessBind(key, down);
 430     end
 431     else if gConsoleShow or gChatShow or (g_ActiveWindow <> nil) then
 432     begin
 433       KeyPress(key) // key repeat in menus and shit
 434     end;
 435     if down and IsValid1251(ev.keysym.unicode) and IsPrintable1251(ch) then
 436       CharPress(ch)
 437   end;
 438
 439   procedure HandleResize (var ev: TSDL_ResizeEvent);
 440   begin
 441     if g_dbg_input then
 442       e_LogWritefln('Input Debug: SDL_VIDEORESIZE %s %s', [ev.w, ev.h]);
 443     if modeResize = 1 then
 444       UpdateSize(ev.w, ev.h)
 445     else if modeResize > 1 then
 446       InitWindow(ev.w, ev.h, gBPP, gFullscreen)
 447   end;
 448
 449   function sys_HandleInput (): Boolean;
 450     var ev: TSDL_Event;
 451   begin
 452     result := false;
 453     while SDL_PollEvent(@ev) <> 0 do
 454     begin
 455       case ev.type_ of
 456         SDL_QUITEV: result := true;
 457         SDL_VIDEORESIZE: HandleResize(ev.resize);
 458         SDL_KEYUP, SDL_KEYDOWN: HandleKeyboard(ev.key);
 459         SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP: HandleJoyButton(ev.jbutton);
 460         SDL_JOYAXISMOTION: HandleJoyAxis(ev.jaxis);
 461         SDL_JOYHATMOTION: HandleJoyHat(ev.jhat);
 462         SDL_VIDEOEXPOSE: sys_Repaint;
 463         SDL_ACTIVEEVENT: e_MuteChannels((ev.active.gain = 0) and gMuteWhenInactive);
 464       end
 465     end
 466   end;
 467
 468   procedure sys_RequestQuit;
 469     var ev: TSDL_Event;
 470   begin
 471     ev.quit.type_ := SDL_QUITEV;
 472     SDL_PushEvent(@ev)
 473   end;
 474
 475   (* --------- Init --------- *)
 476
 477   procedure sys_Init;
 478     var flags: Uint32; i: Integer;
 479   begin
 480     e_WriteLog('Init SDL', TMsgType.Notify);
 481     flags := SDL_INIT_VIDEO or SDL_INIT_AUDIO or
 482              SDL_INIT_TIMER or SDL_INIT_JOYSTICK
 483              (*or SDL_INIT_NOPARACHUTE*);
 484     if SDL_Init(flags) <> 0 then
 485       raise Exception.Create('SDL: Init failed: ' + SDL_GetError);
 486     SDL_EnableUNICODE(1);
 487     SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
 488     for i := 0 to e_MaxJoys - 1 do
 489       AddJoystick(i)
 490   end;
 491
 492   procedure sys_Final;
 493     var i: Integer;
 494   begin
 495     e_WriteLog('Releasing SDL', TMsgType.Notify);
 496     for i := 0 to e_MaxJoys - 1 do
 497       RemoveJoystick(i);
 498     if screen <> nil then
 499     begin
 500       {$IFDEF NOGL_INIT}
 501         nogl_Quit;
 502       {$ENDIF}
 503       SDL_FreeSurface(screen)
 504     end;
 505     SDL_Quit
 506   end;
 507
 508 initialization
 509   (* window resize are broken both on linux and osx, so disabled by default *)
 510   conRegVar('sdl_allow_resize', @userResize, 'allow to resize window by user', 'allow to resize window by user');
 511   conRegVar('sdl_resize_action', @modeResize, 'set window resize mode (0: ignore, 1: change, 2: reset)', '');
 512   userResize := false;
 513   modeResize := 0;
 514 end.