vid_sdl.c

   1 /*
   2 Copyright (C) 2003  T. Joseph Carter
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18 */
  19 #undef WIN32_LEAN_AND_MEAN  //hush a warning, SDL.h redefines this
  20 #include <SDL.h>
  21 #include <stdio.h>
  22
  23 #include "quakedef.h"
  24
  25 // Tell startup code that we have a client
  26 int cl_available = true;
  27
  28 qboolean vid_supportrefreshrate = false;
  29
  30 cvar_t joy_detected = {CVAR_READONLY, "joy_detected", "0", "number of joysticks detected by engine"};
  31 cvar_t joy_enable = {0, "joy_enable", "1", "enables joystick support"};
  32 cvar_t joy_index = {0, "joy_index", "0", "selects which joystick to use if you have multiple"};
  33 cvar_t joy_axisforward = {0, "joy_axisforward", "1", "which joystick axis to query for forward/backward movement"};
  34 cvar_t joy_axisside = {0, "joy_axisside", "0", "which joystick axis to query for right/left movement"};
  35 cvar_t joy_axisup = {0, "joy_axisup", "-1", "which joystick axis to query for up/down movement"};
  36 cvar_t joy_axispitch = {0, "joy_axispitch", "3", "which joystick axis to query for looking up/down"};
  37 cvar_t joy_axisyaw = {0, "joy_axisyaw", "2", "which joystick axis to query for looking right/left"};
  38 cvar_t joy_axisroll = {0, "joy_axisroll", "-1", "which joystick axis to query for tilting head right/left"};
  39 cvar_t joy_deadzoneforward = {0, "joy_deadzoneforward", "0", "deadzone tolerance, suggested values are in the range 0 to 0.01"};
  40 cvar_t joy_deadzoneside = {0, "joy_deadzoneside", "0", "deadzone tolerance, suggested values are in the range 0 to 0.01"};
  41 cvar_t joy_deadzoneup = {0, "joy_deadzoneup", "0", "deadzone tolerance, suggested values are in the range 0 to 0.01"};
  42 cvar_t joy_deadzonepitch = {0, "joy_deadzonepitch", "0", "deadzone tolerance, suggested values are in the range 0 to 0.01"};
  43 cvar_t joy_deadzoneyaw = {0, "joy_deadzoneyaw", "0", "deadzone tolerance, suggested values are in the range 0 to 0.01"};
  44 cvar_t joy_deadzoneroll = {0, "joy_deadzoneroll", "0", "deadzone tolerance, suggested values are in the range 0 to 0.01"};
  45 cvar_t joy_sensitivityforward = {0, "joy_sensitivityforward", "-1", "movement multiplier"};
  46 cvar_t joy_sensitivityside = {0, "joy_sensitivityside", "1", "movement multiplier"};
  47 cvar_t joy_sensitivityup = {0, "joy_sensitivityup", "1", "movement multiplier"};
  48 cvar_t joy_sensitivitypitch = {0, "joy_sensitivitypitch", "1", "movement multiplier"};
  49 cvar_t joy_sensitivityyaw = {0, "joy_sensitivityyaw", "-1", "movement multiplier"};
  50 cvar_t joy_sensitivityroll = {0, "joy_sensitivityroll", "1", "movement multiplier"};
  51
  52
  53 static qboolean vid_usingmouse;
  54 static qboolean vid_isfullscreen;
  55 static int vid_numjoysticks = 0;
  56 #define MAX_JOYSTICKS 8
  57 static SDL_Joystick *vid_joysticks[MAX_JOYSTICKS];
  58
  59 static SDL_Surface *screen;
  60
  61 /////////////////////////
  62 // Input handling
  63 ////
  64 //TODO: Add joystick support
  65 //TODO: Add error checking
  66
  67
  68 //keysym to quake keysym mapping
  69 #define tenoh   0,0,0,0,0, 0,0,0,0,0
  70 #define fiftyoh tenoh, tenoh, tenoh, tenoh, tenoh
  71 #define hundredoh fiftyoh, fiftyoh
  72 static unsigned int tbl_sdltoquake[] =
  73 {
  74         0,0,0,0,                //SDLK_UNKNOWN          = 0,
  75         0,0,0,0,                //SDLK_FIRST            = 0,
  76         K_BACKSPACE,    //SDLK_BACKSPACE        = 8,
  77         K_TAB,                  //SDLK_TAB                      = 9,
  78         0,0,
  79         0,                              //SDLK_CLEAR            = 12,
  80         K_ENTER,                //SDLK_RETURN           = 13,
  81     0,0,0,0,0,
  82         K_PAUSE,                //SDLK_PAUSE            = 19,
  83         0,0,0,0,0,0,0,
  84         K_ESCAPE,               //SDLK_ESCAPE           = 27,
  85         0,0,0,0,
  86         K_SPACE,                //SDLK_SPACE            = 32,
  87         '!',                    //SDLK_EXCLAIM          = 33,
  88         '"',                    //SDLK_QUOTEDBL         = 34,
  89         '#',                    //SDLK_HASH                     = 35,
  90         '$',                    //SDLK_DOLLAR           = 36,
  91         0,
  92         '&',                    //SDLK_AMPERSAND        = 38,
  93         '\'',                   //SDLK_QUOTE            = 39,
  94         '(',                    //SDLK_LEFTPAREN        = 40,
  95         ')',                    //SDLK_RIGHTPAREN       = 41,
  96         '*',                    //SDLK_ASTERISK         = 42,
  97         '+',                    //SDLK_PLUS                     = 43,
  98         ',',                    //SDLK_COMMA            = 44,
  99         '-',                    //SDLK_MINUS            = 45,
 100         '.',                    //SDLK_PERIOD           = 46,
 101         '/',                    //SDLK_SLASH            = 47,
 102         '0',                    //SDLK_0                        = 48,
 103         '1',                    //SDLK_1                        = 49,
 104         '2',                    //SDLK_2                        = 50,
 105         '3',                    //SDLK_3                        = 51,
 106         '4',                    //SDLK_4                        = 52,
 107         '5',                    //SDLK_5                        = 53,
 108         '6',                    //SDLK_6                        = 54,
 109         '7',                    //SDLK_7                        = 55,
 110         '8',                    //SDLK_8                        = 56,
 111         '9',                    //SDLK_9                        = 57,
 112         ':',                    //SDLK_COLON            = 58,
 113         ';',                    //SDLK_SEMICOLON        = 59,
 114         '<',                    //SDLK_LESS                     = 60,
 115         '=',                    //SDLK_EQUALS           = 61,
 116         '>',                    //SDLK_GREATER          = 62,
 117         '?',                    //SDLK_QUESTION         = 63,
 118         '@',                    //SDLK_AT                       = 64,
 119         0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 120         '[',            //SDLK_LEFTBRACKET      = 91,
 121         '\\',           //SDLK_BACKSLASH        = 92,
 122         ']',            //SDLK_RIGHTBRACKET     = 93,
 123         '^',            //SDLK_CARET            = 94,
 124         '_',            //SDLK_UNDERSCORE       = 95,
 125         '`',            //SDLK_BACKQUOTE        = 96,
 126         'a',            //SDLK_a                        = 97,
 127         'b',            //SDLK_b                        = 98,
 128         'c',            //SDLK_c                        = 99,
 129         'd',            //SDLK_d                        = 100,
 130         'e',            //SDLK_e                        = 101,
 131         'f',            //SDLK_f                        = 102,
 132         'g',            //SDLK_g                        = 103,
 133         'h',            //SDLK_h                        = 104,
 134         'i',            //SDLK_i                        = 105,
 135         'j',            //SDLK_j                        = 106,
 136         'k',            //SDLK_k                        = 107,
 137         'l',            //SDLK_l                        = 108,
 138         'm',            //SDLK_m                        = 109,
 139         'n',            //SDLK_n                        = 110,
 140         'o',            //SDLK_o                        = 111,
 141         'p',            //SDLK_p                        = 112,
 142         'q',            //SDLK_q                        = 113,
 143         'r',            //SDLK_r                        = 114,
 144         's',            //SDLK_s                        = 115,
 145         't',            //SDLK_t                        = 116,
 146         'u',            //SDLK_u                        = 117,
 147         'v',            //SDLK_v                        = 118,
 148         'w',            //SDLK_w                        = 119,
 149         'x',            //SDLK_x                        = 120,
 150         'y',            //SDLK_y                        = 121,
 151         'z',            //SDLK_z                        = 122,
 152         0,0,0,0,
 153         K_DEL,          //SDLK_DELETE           = 127,
 154         hundredoh /*227*/, tenoh, tenoh, 0,0,0,0,0,0,0,0,
 155         K_KP_0,         //SDLK_KP0              = 256,
 156         K_KP_1,         //SDLK_KP1              = 257,
 157         K_KP_2,         //SDLK_KP2              = 258,
 158         K_KP_3,         //SDLK_KP3              = 259,
 159         K_KP_4,         //SDLK_KP4              = 260,
 160         K_KP_5,         //SDLK_KP5              = 261,
 161         K_KP_6,         //SDLK_KP6              = 262,
 162         K_KP_7,         //SDLK_KP7              = 263,
 163         K_KP_8,         //SDLK_KP8              = 264,
 164         K_KP_9,         //SDLK_KP9              = 265,
 165         K_KP_PERIOD,//SDLK_KP_PERIOD    = 266,
 166         K_KP_DIVIDE,//SDLK_KP_DIVIDE    = 267,
 167         K_KP_MULTIPLY,//SDLK_KP_MULTIPLY= 268,
 168         K_KP_MINUS,     //SDLK_KP_MINUS         = 269,
 169         K_KP_PLUS,      //SDLK_KP_PLUS          = 270,
 170         K_KP_ENTER,     //SDLK_KP_ENTER         = 271,
 171         K_KP_EQUALS,//SDLK_KP_EQUALS    = 272,
 172         K_UPARROW,      //SDLK_UP               = 273,
 173         K_DOWNARROW,//SDLK_DOWN         = 274,
 174         K_RIGHTARROW,//SDLK_RIGHT       = 275,
 175         K_LEFTARROW,//SDLK_LEFT         = 276,
 176         K_INS,          //SDLK_INSERT   = 277,
 177         K_HOME,         //SDLK_HOME             = 278,
 178         K_END,          //SDLK_END              = 279,
 179         K_PGUP,         //SDLK_PAGEUP   = 280,
 180         K_PGDN,         //SDLK_PAGEDOWN = 281,
 181         K_F1,           //SDLK_F1               = 282,
 182         K_F2,           //SDLK_F2               = 283,
 183         K_F3,           //SDLK_F3               = 284,
 184         K_F4,           //SDLK_F4               = 285,
 185         K_F5,           //SDLK_F5               = 286,
 186         K_F6,           //SDLK_F6               = 287,
 187         K_F7,           //SDLK_F7               = 288,
 188         K_F8,           //SDLK_F8               = 289,
 189         K_F9,           //SDLK_F9               = 290,
 190         K_F10,          //SDLK_F10              = 291,
 191         K_F11,          //SDLK_F11              = 292,
 192         K_F12,          //SDLK_F12              = 293,
 193         0,                      //SDLK_F13              = 294,
 194         0,                      //SDLK_F14              = 295,
 195         0,                      //SDLK_F15              = 296,
 196         0,0,0,
 197         K_NUMLOCK,      //SDLK_NUMLOCK  = 300,
 198         K_CAPSLOCK,     //SDLK_CAPSLOCK = 301,
 199         K_SCROLLOCK,//SDLK_SCROLLOCK= 302,
 200         K_SHIFT,        //SDLK_RSHIFT   = 303,
 201         K_SHIFT,        //SDLK_LSHIFT   = 304,
 202         K_CTRL,         //SDLK_RCTRL    = 305,
 203         K_CTRL,         //SDLK_LCTRL    = 306,
 204         K_ALT,          //SDLK_RALT             = 307,
 205         K_ALT,          //SDLK_LALT             = 308,
 206         0,                      //SDLK_RMETA    = 309,
 207         0,                      //SDLK_LMETA    = 310,
 208         0,                      //SDLK_LSUPER   = 311,          /* Left "Windows" key */
 209         0,                      //SDLK_RSUPER   = 312,          /* Right "Windows" key */
 210         K_ALT,                  //SDLK_MODE             = 313,          /* "Alt Gr" key */
 211         0,                      //SDLK_COMPOSE  = 314,          /* Multi-key compose key */
 212         0,                      //SDLK_HELP             = 315,
 213         0,                      //SDLK_PRINT    = 316,
 214         0,                      //SDLK_SYSREQ   = 317,
 215         K_PAUSE,        //SDLK_BREAK    = 318,
 216         0,                      //SDLK_MENU             = 319,
 217         0,                      //SDLK_POWER    = 320,          /* Power Macintosh power key */
 218         'e',            //SDLK_EURO             = 321,          /* Some european keyboards */
 219         0                       //SDLK_UNDO             = 322,          /* Atari keyboard has Undo */
 220 };
 221 #undef tenoh
 222 #undef fiftyoh
 223 #undef hundredoh
 224
 225 static int MapKey( unsigned int sdlkey )
 226 {
 227         if( sdlkey > sizeof(tbl_sdltoquake)/ sizeof(int) )
 228                 return 0;
 229     return tbl_sdltoquake[ sdlkey ];
 230 }
 231
 232 static void IN_Activate( qboolean grab )
 233 {
 234         if (grab)
 235         {
 236                 if (!vid_usingmouse)
 237                 {
 238                         vid_usingmouse = true;
 239                         cl_ignoremousemove = true;
 240                         SDL_WM_GrabInput( SDL_GRAB_ON );
 241                         SDL_ShowCursor( SDL_DISABLE );
 242                 }
 243         }
 244         else
 245         {
 246                 if (vid_usingmouse)
 247                 {
 248                         vid_usingmouse = false;
 249                         cl_ignoremousemove = true;
 250                         SDL_WM_GrabInput( SDL_GRAB_OFF );
 251                         SDL_ShowCursor( SDL_ENABLE );
 252                 }
 253         }
 254 }
 255
 256 static double IN_JoystickGetAxis(SDL_Joystick *joy, int axis, double sensitivity, double deadzone)
 257 {
 258         double value;
 259         if (axis < 0 || axis >= SDL_JoystickNumAxes(joy))
 260                 return 0; // no such axis on this joystick
 261         value = SDL_JoystickGetAxis(joy, axis) * (1.0 / 32767.0);
 262         value = bound(-1, value, 1);
 263         if (fabs(value) < deadzone)
 264                 return 0; // within deadzone around center
 265         return value * sensitivity;
 266 }
 267
 268 void IN_Move( void )
 269 {
 270         int j;
 271         int x, y;
 272         if( vid_usingmouse )
 273         {
 274                 SDL_GetRelativeMouseState( &x, &y );
 275                 in_mouse_x = x;
 276                 in_mouse_y = y;
 277         }
 278         if (vid_numjoysticks && joy_enable.integer && joy_index.integer >= 0 && joy_index.integer < vid_numjoysticks)
 279         {
 280                 SDL_Joystick *joy = vid_joysticks[joy_index.integer];
 281                 int numballs = SDL_JoystickNumBalls(joy);
 282                 for (j = 0;j < numballs;j++)
 283                 {
 284                         SDL_JoystickGetBall(joy, j, &x, &y);
 285                         in_mouse_x += x;
 286                         in_mouse_y += y;
 287                 }
 288                 cl.cmd.forwardmove += IN_JoystickGetAxis(joy, joy_axisforward.integer, joy_sensitivityforward.value, joy_deadzoneforward.value) * cl_forwardspeed.value;
 289                 cl.cmd.sidemove    += IN_JoystickGetAxis(joy, joy_axisside.integer, joy_sensitivityside.value, joy_deadzoneside.value) * cl_sidespeed.value;
 290                 cl.cmd.upmove      += IN_JoystickGetAxis(joy, joy_axisup.integer, joy_sensitivityup.value, joy_deadzoneup.value) * cl_upspeed.value;
 291                 cl.viewangles[0]   += IN_JoystickGetAxis(joy, joy_axispitch.integer, joy_sensitivitypitch.value, joy_deadzonepitch.value) * cl.realframetime * cl_pitchspeed.value;
 292                 cl.viewangles[1]   += IN_JoystickGetAxis(joy, joy_axisyaw.integer, joy_sensitivityyaw.value, joy_deadzoneyaw.value) * cl.realframetime * cl_yawspeed.value;
 293                 //cl.viewangles[2]   += IN_JoystickGetAxis(joy, joy_axisroll.integer, joy_sensitivityroll.value, joy_deadzoneroll.value) * cl.realframetime * cl_rollspeed.value;
 294         }
 295 }
 296
 297 /////////////////////
 298 // Message Handling
 299 ////
 300
 301 static int Sys_EventFilter( SDL_Event *event )
 302 {
 303         //TODO: Add a quit query in linux, too - though linux user are more likely to know what they do
 304 #ifdef WIN32
 305         if( event->type == SDL_QUIT && MessageBox( NULL, "Are you sure you want to quit?", "Confirm Exit", MB_YESNO | MB_SETFOREGROUND | MB_ICONQUESTION ) == IDNO )
 306                 return 0;
 307         else
 308                 return 1;
 309 #else
 310         return 1;
 311 #endif
 312 }
 313
 314 static keynum_t buttonremap[18] =
 315 {
 316         K_MOUSE1,
 317         K_MOUSE3,
 318         K_MOUSE2,
 319         K_MWHEELUP,
 320         K_MWHEELDOWN,
 321         K_MOUSE4,
 322         K_MOUSE5,
 323         K_MOUSE6,
 324         K_MOUSE7,
 325         K_MOUSE8,
 326         K_MOUSE9,
 327         K_MOUSE10,
 328         K_MOUSE11,
 329         K_MOUSE12,
 330         K_MOUSE13,
 331         K_MOUSE14,
 332         K_MOUSE15,
 333         K_MOUSE16,
 334 };
 335
 336 void Sys_SendKeyEvents( void )
 337 {
 338         static qboolean sound_active = true;
 339         SDL_Event event;
 340
 341         while( SDL_PollEvent( &event ) )
 342                 switch( event.type ) {
 343                         case SDL_QUIT:
 344                                 Sys_Quit(0);
 345                                 break;
 346                         case SDL_KEYDOWN:
 347                         case SDL_KEYUP:
 348                                 Key_Event( MapKey( event.key.keysym.sym ), (char)event.key.keysym.unicode, (event.key.state == SDL_PRESSED) );
 349                                 break;
 350                         case SDL_ACTIVEEVENT:
 351                                 if( event.active.state == SDL_APPACTIVE )
 352                                 {
 353                                         if( event.active.gain )
 354                                                 vid_hidden = false;
 355                                         else
 356                                                 vid_hidden = true;
 357                                 }
 358                                 break;
 359                         case SDL_MOUSEBUTTONDOWN:
 360                         case SDL_MOUSEBUTTONUP:
 361                                 if (event.button.button <= 18)
 362                                         Key_Event( buttonremap[event.button.button - 1], 0, event.button.state == SDL_PRESSED );
 363                                 break;
 364                         case SDL_JOYBUTTONDOWN:
 365                                 if (!joy_enable.integer)
 366                                         break; // ignore down events if joystick has been disabled
 367                         case SDL_JOYBUTTONUP:
 368                                 if (event.jbutton.button < 48)
 369                                         Key_Event( event.jbutton.button + (event.jbutton.button < 16 ? K_JOY1 : K_AUX1 - 16), 0, (event.jbutton.state == SDL_PRESSED) );
 370                                 break;
 371                 }
 372
 373         // enable/disable sound on focus gain/loss
 374         if (!vid_activewindow && sound_active)
 375         {
 376                 S_BlockSound ();
 377                 sound_active = false;
 378         }
 379         else if (vid_activewindow && !sound_active)
 380         {
 381                 S_UnblockSound ();
 382                 sound_active = true;
 383         }
 384 }
 385
 386 /////////////////
 387 // Video system
 388 ////
 389
 390 void *GL_GetProcAddress(const char *name)
 391 {
 392         void *p = NULL;
 393         p = SDL_GL_GetProcAddress(name);
 394         return p;
 395 }
 396
 397 static int Sys_EventFilter( SDL_Event *event );
 398 static qboolean vid_sdl_initjoysticksystem = false;
 399 void VID_Init (void)
 400 {
 401         Cvar_RegisterVariable(&joy_detected);
 402         Cvar_RegisterVariable(&joy_enable);
 403         Cvar_RegisterVariable(&joy_index);
 404         Cvar_RegisterVariable(&joy_axisforward);
 405         Cvar_RegisterVariable(&joy_axisside);
 406         Cvar_RegisterVariable(&joy_axisup);
 407         Cvar_RegisterVariable(&joy_axispitch);
 408         Cvar_RegisterVariable(&joy_axisyaw);
 409         //Cvar_RegisterVariable(&joy_axisroll);
 410         Cvar_RegisterVariable(&joy_deadzoneforward);
 411         Cvar_RegisterVariable(&joy_deadzoneside);
 412         Cvar_RegisterVariable(&joy_deadzoneup);
 413         Cvar_RegisterVariable(&joy_deadzonepitch);
 414         Cvar_RegisterVariable(&joy_deadzoneyaw);
 415         //Cvar_RegisterVariable(&joy_deadzoneroll);
 416         Cvar_RegisterVariable(&joy_sensitivityforward);
 417         Cvar_RegisterVariable(&joy_sensitivityside);
 418         Cvar_RegisterVariable(&joy_sensitivityup);
 419         Cvar_RegisterVariable(&joy_sensitivitypitch);
 420         Cvar_RegisterVariable(&joy_sensitivityyaw);
 421         //Cvar_RegisterVariable(&joy_sensitivityroll);
 422
 423         if (SDL_Init(SDL_INIT_VIDEO) < 0)
 424                 Sys_Error ("Failed to init SDL video subsystem: %s", SDL_GetError());
 425         vid_sdl_initjoysticksystem = SDL_Init(SDL_INIT_JOYSTICK) >= 0;
 426         if (vid_sdl_initjoysticksystem)
 427                 Con_Printf("Failed to init SDL joystick subsystem: %s\n", SDL_GetError());
 428         vid_isfullscreen = false;
 429 }
 430
 431 // set the icon (we dont use SDL here since it would be too much a PITA)
 432 #ifdef WIN32
 433 #include "resource.h"
 434 #include <SDL_syswm.h>
 435 static void VID_SetCaption()
 436 {
 437     SDL_SysWMinfo       info;
 438         HICON                   icon;
 439
 440         // set the caption
 441         SDL_WM_SetCaption( gamename, NULL );
 442
 443         // get the HWND handle
 444     SDL_VERSION( &info.version );
 445         if( !SDL_GetWMInfo( &info ) )
 446                 return;
 447
 448         icon = LoadIcon( GetModuleHandle( NULL ), MAKEINTRESOURCE( IDI_ICON1 ) );
 449 #ifndef _W64 //If Windows 64bit data types don't exist
 450 #define SetClassLongPtr SetClassLong
 451 #define GCLP_HICON GCL_HICON
 452 #define LONG_PTR LONG
 453 #endif
 454         SetClassLongPtr( info.window, GCLP_HICON, (LONG_PTR)icon );
 455 }
 456 #else
 457 static void VID_SetCaption()
 458 {
 459         SDL_WM_SetCaption( gamename, NULL );
 460 }
 461 #endif
 462
 463 static void VID_OutputVersion()
 464 {
 465         const SDL_version *version;
 466         version = SDL_Linked_Version();
 467         Con_Printf(     "Linked against SDL version %d.%d.%d\n"
 468                                         "Using SDL library version %d.%d.%d\n",
 469                                         SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL,
 470                                         version->major, version->minor, version->patch );
 471 }
 472
 473 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate, int stereobuffer)
 474 {
 475         int i;
 476         static int notfirstvideomode = false;
 477         int flags = SDL_OPENGL;
 478         const char *drivername;
 479
 480         VID_OutputVersion();
 481
 482         /*
 483         SDL Hack
 484                 We cant switch from one OpenGL video mode to another.
 485                 Thus we first switch to some stupid 2D mode and then back to OpenGL.
 486         */
 487         if (notfirstvideomode)
 488                 SDL_SetVideoMode( 0, 0, 0, 0 );
 489         notfirstvideomode = true;
 490
 491         // SDL usually knows best
 492         drivername = NULL;
 493
 494 // COMMANDLINEOPTION: SDL GL: -gl_driver <drivername> selects a GL driver library, default is whatever SDL recommends, useful only for 3dfxogl.dll/3dfxvgl.dll or fxmesa or similar, if you don't know what this is for, you don't need it
 495         i = COM_CheckParm("-gl_driver");
 496         if (i && i < com_argc - 1)
 497                 drivername = com_argv[i + 1];
 498         if (SDL_GL_LoadLibrary(drivername) < 0)
 499         {
 500                 Con_Printf("Unable to load GL driver \"%s\": %s\n", drivername, SDL_GetError());
 501                 return false;
 502         }
 503
 504         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 505         {
 506                 VID_Shutdown();
 507                 Con_Print("Required OpenGL function glGetString not found\n");
 508                 return false;
 509         }
 510
 511         // Knghtbrd: should do platform-specific extension string function here
 512
 513         vid_isfullscreen = false;
 514         if (fullscreen) {
 515                 flags |= SDL_FULLSCREEN;
 516                 vid_isfullscreen = true;
 517         }
 518
 519         SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
 520         if (bpp >= 32)
 521         {
 522                 SDL_GL_SetAttribute (SDL_GL_RED_SIZE, 8);
 523                 SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, 8);
 524                 SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 8);
 525                 SDL_GL_SetAttribute (SDL_GL_ALPHA_SIZE, 8);
 526                 SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 24);
 527                 SDL_GL_SetAttribute (SDL_GL_STENCIL_SIZE, 8);
 528         }
 529         else
 530         {
 531                 SDL_GL_SetAttribute (SDL_GL_RED_SIZE, 1);
 532                 SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, 1);
 533                 SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 1);
 534                 SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 16);
 535         }
 536         if (stereobuffer)
 537                 SDL_GL_SetAttribute (SDL_GL_STEREO, 1);
 538
 539         screen = SDL_SetVideoMode(width, height, bpp, flags);
 540         if (screen == NULL)
 541         {
 542                 Con_Printf("Failed to set video mode to %ix%i: %s\n", width, height, SDL_GetError());
 543                 VID_Shutdown();
 544                 return false;
 545         }
 546
 547         // set window title
 548         VID_SetCaption();
 549         // set up an event filter to ask confirmation on close button in WIN32
 550         SDL_SetEventFilter( (SDL_EventFilter) Sys_EventFilter );
 551         // init keyboard
 552         SDL_EnableUNICODE( SDL_ENABLE );
 553         // enable key repeat since everyone expects it
 554         SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
 555
 556         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 557         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 558         gl_version = (const char *)qglGetString(GL_VERSION);
 559         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 560         gl_platform = "SDL";
 561         // Knghtbrd: should assign platform-specific extensions here
 562         //TODO: maybe ;)
 563         gl_platformextensions = "";
 564         gl_videosyncavailable = false;
 565
 566         GL_Init();
 567
 568         vid_numjoysticks = SDL_NumJoysticks();
 569         vid_numjoysticks = bound(0, vid_numjoysticks, MAX_JOYSTICKS);
 570         Cvar_SetValueQuick(&joy_detected, vid_numjoysticks);
 571         Con_Printf("%d SDL joystick(s) found:\n", vid_numjoysticks);
 572         memset(vid_joysticks, 0, sizeof(vid_joysticks));
 573         for (i = 0;i < vid_numjoysticks;i++)
 574         {
 575                 SDL_Joystick *joy;
 576                 joy = vid_joysticks[i] = SDL_JoystickOpen(i);
 577                 if (!joy)
 578                 {
 579                         Con_Printf("joystick #%i: open failed: %s\n", i, SDL_GetError());
 580                         continue;
 581                 }
 582                 Con_Printf("joystick #%i: opened \"%s\" with %i axes, %i buttons, %i balls\n", i, SDL_JoystickName(i), (int)SDL_JoystickNumAxes(joy), (int)SDL_JoystickNumButtons(joy), (int)SDL_JoystickNumBalls(joy));
 583         }
 584
 585         vid_hidden = false;
 586         vid_activewindow = false;
 587         vid_usingmouse = false;
 588         return true;
 589 }
 590
 591 void VID_Shutdown (void)
 592 {
 593         // this is needed to retry gamma after a vid_restart
 594         VID_RestoreSystemGamma();
 595
 596         IN_Activate(false);
 597         SDL_QuitSubSystem(SDL_INIT_VIDEO);
 598 }
 599
 600 int VID_SetGamma (unsigned short *ramps, int rampsize)
 601 {
 602         return !SDL_SetGammaRamp (ramps, ramps + rampsize, ramps + rampsize*2);
 603 }
 604
 605 int VID_GetGamma (unsigned short *ramps, int rampsize)
 606 {
 607         return !SDL_GetGammaRamp (ramps, ramps + rampsize, ramps + rampsize*2);
 608 }
 609
 610 void VID_Finish (qboolean allowmousegrab)
 611 {
 612         Uint8 appstate;
 613         qboolean vid_usemouse;
 614
 615         //react on appstate changes
 616         appstate = SDL_GetAppState();
 617
 618         vid_hidden = !(appstate & SDL_APPACTIVE);
 619
 620         if( vid_hidden || !( appstate & SDL_APPMOUSEFOCUS ) || !( appstate & SDL_APPINPUTFOCUS ) )
 621                 vid_activewindow = false;
 622         else
 623                 vid_activewindow = true;
 624
 625         vid_usemouse = false;
 626         if( allowmousegrab && vid_mouse.integer && !key_consoleactive && (key_dest != key_game || !cls.demoplayback) )
 627                 vid_usemouse = true;
 628         if( vid_isfullscreen )
 629                 vid_usemouse = true;
 630         if( !vid_activewindow )
 631                 vid_usemouse = false;
 632
 633         IN_Activate(vid_usemouse);
 634
 635         VID_UpdateGamma(false, 256);
 636
 637         if (r_render.integer && !vid_hidden)
 638         {
 639                 CHECKGLERROR
 640                 if (r_speeds.integer || gl_finish.integer)
 641                 {
 642                         qglFinish();CHECKGLERROR
 643                 }
 644                 SDL_GL_SwapBuffers();
 645         }
 646 }