vid_glx.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   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
  20 //#include <termios.h>
  21 //#include <sys/ioctl.h>
  22 //#include <sys/stat.h>
  23 //#include <sys/vt.h>
  24 //#include <stdarg.h>
  25 //#include <stdio.h>
  26 #include <signal.h>
  27
  28 #include <dlfcn.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/Xutil.h>
  32 #include <GL/glx.h>
  33
  34 #include <X11/keysym.h>
  35 #include <X11/cursorfont.h>
  36
  37 #include <X11/extensions/XShm.h>
  38 #include <X11/extensions/xf86dga.h>
  39 #include <X11/extensions/xf86vmode.h>
  40
  41 #include "quakedef.h"
  42
  43 int cl_available = true;
  44
  45 //GLX prototypes
  46 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  47 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  48 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  49 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  50 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  51 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  52
  53 //GLX_ARB_get_proc_address
  54 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  55
  56 static dllfunction_t getprocaddressfuncs[] =
  57 {
  58         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  59         {NULL, NULL}
  60 };
  61
  62 //GLX_SGI_video_sync
  63 GLint (GLAPIENTRY *qglXGetVideoSyncSGI)(GLuint *count);
  64 GLint (GLAPIENTRY *qglXWaitVideoSyncSGI)(GLint divisor, GLint remainder, GLuint *count);
  65
  66 static dllfunction_t videosyncfuncs[] =
  67 {
  68         {"glXGetVideoSyncSGI", (void **) &qglXGetVideoSyncSGI},
  69         {"glXWaitVideoSyncSGI", (void **) &qglXWaitVideoSyncSGI},
  70         {NULL, NULL}
  71 };
  72
  73 static Display *vidx11_display = NULL;
  74 static int vidx11_screen;
  75 static Window win;
  76 static GLXContext ctx = NULL;
  77
  78 Atom wm_delete_window_atom;
  79
  80 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  81 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  82                     PointerMotionMask | ButtonMotionMask)
  83 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  84                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  85                 LeaveWindowMask)
  86
  87
  88 static qboolean         mouse_avail = true;
  89 static qboolean         mouse_active = false, usingmouse = false;
  90 static float    mouse_x, mouse_y;
  91 static int p_mouse_x, p_mouse_y;
  92
  93 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
  94 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
  95
  96 qboolean vidmode_ext = false;
  97
  98 static int win_x, win_y;
  99
 100 static int scr_width, scr_height;
 101
 102 static XF86VidModeModeInfo **vidmodes;
 103 static int num_vidmodes;
 104 static qboolean vidmode_active = false;
 105
 106 static Visual *vidx11_visual;
 107 static Colormap vidx11_colormap;
 108
 109 /*-----------------------------------------------------------------------*/
 110
 111 static int XLateKey(XKeyEvent *ev)
 112 {
 113         int key = 0;
 114         char buf[64];
 115         KeySym keysym, shifted;
 116
 117         keysym = XLookupKeysym (ev, 0);
 118         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 119
 120         switch(keysym)
 121         {
 122                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 123                 case XK_Page_Up:         key = K_PGUP; break;
 124
 125                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 126                 case XK_Page_Down:       key = K_PGDN; break;
 127
 128                 case XK_KP_Home: key = K_KP_HOME; break;
 129                 case XK_Home:    key = K_HOME; break;
 130
 131                 case XK_KP_End:  key = K_KP_END; break;
 132                 case XK_End:     key = K_END; break;
 133
 134                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 135                 case XK_Left:    key = K_LEFTARROW; break;
 136
 137                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 138                 case XK_Right:  key = K_RIGHTARROW;             break;
 139
 140                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 141                 case XK_Down:    key = K_DOWNARROW; break;
 142
 143                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 144                 case XK_Up:              key = K_UPARROW;        break;
 145
 146                 case XK_Escape: key = K_ESCAPE;         break;
 147
 148                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 149                 case XK_Return: key = K_ENTER;           break;
 150
 151                 case XK_Tab:            key = K_TAB;                     break;
 152
 153                 case XK_F1:              key = K_F1;                            break;
 154
 155                 case XK_F2:              key = K_F2;                            break;
 156
 157                 case XK_F3:              key = K_F3;                            break;
 158
 159                 case XK_F4:              key = K_F4;                            break;
 160
 161                 case XK_F5:              key = K_F5;                            break;
 162
 163                 case XK_F6:              key = K_F6;                            break;
 164
 165                 case XK_F7:              key = K_F7;                            break;
 166
 167                 case XK_F8:              key = K_F8;                            break;
 168
 169                 case XK_F9:              key = K_F9;                            break;
 170
 171                 case XK_F10:            key = K_F10;                     break;
 172
 173                 case XK_F11:            key = K_F11;                     break;
 174
 175                 case XK_F12:            key = K_F12;                     break;
 176
 177                 case XK_BackSpace: key = K_BACKSPACE; break;
 178
 179                 case XK_KP_Delete: key = K_KP_DEL; break;
 180                 case XK_Delete: key = K_DEL; break;
 181
 182                 case XK_Pause:  key = K_PAUSE;           break;
 183
 184                 case XK_Shift_L:
 185                 case XK_Shift_R:        key = K_SHIFT;          break;
 186
 187                 case XK_Execute:
 188                 case XK_Control_L:
 189                 case XK_Control_R:      key = K_CTRL;            break;
 190
 191                 case XK_Alt_L:
 192                 case XK_Meta_L:
 193                 case XK_Alt_R:
 194                 case XK_Meta_R: key = K_ALT;                    break;
 195
 196                 case XK_KP_Begin: key = K_KP_5; break;
 197
 198                 case XK_Insert:key = K_INS; break;
 199                 case XK_KP_Insert: key = K_KP_INS; break;
 200
 201                 case XK_KP_Multiply: key = '*'; break;
 202                 case XK_KP_Add:  key = K_KP_PLUS; break;
 203                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 204                 case XK_KP_Divide: key = K_KP_SLASH; break;
 205
 206 #if 0
 207                 case 0x021: key = '1';break;/* [!] */
 208                 case 0x040: key = '2';break;/* [@] */
 209                 case 0x023: key = '3';break;/* [#] */
 210                 case 0x024: key = '4';break;/* [$] */
 211                 case 0x025: key = '5';break;/* [%] */
 212                 case 0x05e: key = '6';break;/* [^] */
 213                 case 0x026: key = '7';break;/* [&] */
 214                 case 0x02a: key = '8';break;/* [*] */
 215                 case 0x028: key = '9';;break;/* [(] */
 216                 case 0x029: key = '0';break;/* [)] */
 217                 case 0x05f: key = '-';break;/* [_] */
 218                 case 0x02b: key = '=';break;/* [+] */
 219                 case 0x07c: key = '\'';break;/* [|] */
 220                 case 0x07d: key = '[';break;/* [}] */
 221                 case 0x07b: key = ']';break;/* [{] */
 222                 case 0x022: key = '\'';break;/* ["] */
 223                 case 0x03a: key = ';';break;/* [:] */
 224                 case 0x03f: key = '/';break;/* [?] */
 225                 case 0x03e: key = '.';break;/* [>] */
 226                 case 0x03c: key = ',';break;/* [<] */
 227 #endif
 228
 229                 default:
 230                         key = buf[0];
 231                         if (key >= 'A' && key <= 'Z')
 232                                 key = key - 'A' + 'a';
 233                         break;
 234         }
 235
 236         return key;
 237 }
 238
 239 static Cursor CreateNullCursor(Display *display, Window root)
 240 {
 241         Pixmap cursormask;
 242         XGCValues xgc;
 243         GC gc;
 244         XColor dummycolour;
 245         Cursor cursor;
 246
 247         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 248         xgc.function = GXclear;
 249         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 250         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 251         dummycolour.pixel = 0;
 252         dummycolour.red = 0;
 253         dummycolour.flags = 04;
 254         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 255         XFreePixmap(display,cursormask);
 256         XFreeGC(display,gc);
 257         return cursor;
 258 }
 259
 260 static void install_grabs(void)
 261 {
 262         XWindowAttributes attribs_1;
 263         XSetWindowAttributes attribs_2;
 264
 265         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 266         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 267         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 268
 269 // inviso cursor
 270         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 271
 272         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 273
 274         if (vid_dga.integer)
 275         {
 276                 int MajorVersion, MinorVersion;
 277
 278                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 279                 {
 280                         // unable to query, probalby not supported
 281                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
 282                         vid_dga.integer = 0;
 283                 }
 284                 else
 285                 {
 286                         vid_dga.integer = 1;
 287                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 288                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 289                 }
 290         }
 291         else
 292                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
 293
 294         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 295
 296         mouse_active = true;
 297         mouse_x = mouse_y = 0;
 298 }
 299
 300 static void uninstall_grabs(void)
 301 {
 302         if (!vidx11_display || !win)
 303                 return;
 304
 305         if (vid_dga.integer == 1)
 306                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 307
 308         XUngrabPointer(vidx11_display, CurrentTime);
 309         XUngrabKeyboard(vidx11_display, CurrentTime);
 310
 311 // inviso cursor
 312         XUndefineCursor(vidx11_display, win);
 313
 314         mouse_active = false;
 315 }
 316
 317 static void HandleEvents(void)
 318 {
 319         XEvent event;
 320         qboolean dowarp = false;
 321
 322         if (!vidx11_display)
 323                 return;
 324
 325         while (XPending(vidx11_display))
 326         {
 327                 XNextEvent(vidx11_display, &event);
 328
 329                 switch (event.type)
 330                 {
 331                 case KeyPress:
 332                         // key pressed
 333                         Key_Event(XLateKey(&event.xkey), true);
 334                         break;
 335
 336                 case KeyRelease:
 337                         // key released
 338                         Key_Event(XLateKey(&event.xkey), false);
 339                         break;
 340
 341                 case MotionNotify:
 342                         // mouse moved
 343                         if (usingmouse)
 344                         {
 345                                 if (vid_dga.integer == 1)
 346                                 {
 347                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 348                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 349                                 }
 350                                 else
 351                                 {
 352
 353                                         if (!event.xmotion.send_event)
 354                                         {
 355                                                 mouse_x += event.xmotion.x - p_mouse_x;
 356                                                 mouse_y += event.xmotion.y - p_mouse_y;
 357                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 358                                                         dowarp = true;
 359                                         }
 360                                         p_mouse_x = event.xmotion.x;
 361                                         p_mouse_y = event.xmotion.y;
 362                                 }
 363                         }
 364                         else
 365                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 366                         break;
 367
 368                 case ButtonPress:
 369                         // mouse button pressed
 370                         switch(event.xbutton.button)
 371                         {
 372                         case 1:
 373                                 Key_Event(K_MOUSE1, true);
 374                                 break;
 375                         case 2:
 376                                 Key_Event(K_MOUSE3, true);
 377                                 break;
 378                         case 3:
 379                                 Key_Event(K_MOUSE2, true);
 380                                 break;
 381                         case 4:
 382                                 Key_Event(K_MWHEELUP, true);
 383                                 break;
 384                         case 5:
 385                                 Key_Event(K_MWHEELDOWN, true);
 386                                 break;
 387                         case 6:
 388                                 Key_Event(K_MOUSE4, true);
 389                                 break;
 390                         case 7:
 391                                 Key_Event(K_MOUSE5, true);
 392                                 break;
 393                         case 8:
 394                                 Key_Event(K_MOUSE6, true);
 395                                 break;
 396                         case 9:
 397                                 Key_Event(K_MOUSE7, true);
 398                                 break;
 399                         case 10:
 400                                 Key_Event(K_MOUSE8, true);
 401                                 break;
 402                         case 11:
 403                                 Key_Event(K_MOUSE9, true);
 404                                 break;
 405                         case 12:
 406                                 Key_Event(K_MOUSE10, true);
 407                                 break;
 408                         default:
 409                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-12 expected\n", event.xbutton.button);
 410                                 break;
 411                         }
 412                         break;
 413
 414                 case ButtonRelease:
 415                         // mouse button released
 416                         switch(event.xbutton.button)
 417                         {
 418                         case 1:
 419                                 Key_Event(K_MOUSE1, false);
 420                                 break;
 421                         case 2:
 422                                 Key_Event(K_MOUSE3, false);
 423                                 break;
 424                         case 3:
 425                                 Key_Event(K_MOUSE2, false);
 426                                 break;
 427                         case 4:
 428                                 Key_Event(K_MWHEELUP, false);
 429                                 break;
 430                         case 5:
 431                                 Key_Event(K_MWHEELDOWN, false);
 432                                 break;
 433                         case 6:
 434                                 Key_Event(K_MOUSE4, false);
 435                                 break;
 436                         case 7:
 437                                 Key_Event(K_MOUSE5, false);
 438                                 break;
 439                         case 8:
 440                                 Key_Event(K_MOUSE6, false);
 441                                 break;
 442                         case 9:
 443                                 Key_Event(K_MOUSE7, false);
 444                                 break;
 445                         case 10:
 446                                 Key_Event(K_MOUSE8, false);
 447                                 break;
 448                         case 11:
 449                                 Key_Event(K_MOUSE9, false);
 450                                 break;
 451                         case 12:
 452                                 Key_Event(K_MOUSE10, false);
 453                                 break;
 454                         default:
 455                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-12 expected\n", event.xbutton.button);
 456                                 break;
 457                         }
 458                         break;
 459
 460                 case CreateNotify:
 461                         // window created
 462                         win_x = event.xcreatewindow.x;
 463                         win_y = event.xcreatewindow.y;
 464                         break;
 465
 466                 case ConfigureNotify:
 467                         // window changed size/location
 468                         win_x = event.xconfigure.x;
 469                         win_y = event.xconfigure.y;
 470                         break;
 471                 case DestroyNotify:
 472                         // window has been destroyed
 473                         Sys_Quit();
 474                         break;
 475                 case ClientMessage:
 476                         // window manager messages
 477                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 478                                 Sys_Quit();
 479                         break;
 480                 case MapNotify:
 481                         // window restored
 482                         vid_hidden = false;
 483                         vid_allowhwgamma = true;
 484                         break;
 485                 case UnmapNotify:
 486                         // window iconified/rolledup/whatever
 487                         vid_hidden = true;
 488                         vid_allowhwgamma = false;
 489                         VID_RestoreSystemGamma();
 490                         break;
 491                 case FocusIn:
 492                         // window is now the input focus
 493                         vid_allowhwgamma = true;
 494                         break;
 495                 case FocusOut:
 496                         // window is no longer the input focus
 497                         vid_allowhwgamma = false;
 498                         VID_RestoreSystemGamma();
 499                         break;
 500                 case EnterNotify:
 501                         // mouse entered window
 502                         vid_allowhwgamma = true;
 503                         break;
 504                 case LeaveNotify:
 505                         // mouse left window
 506                         vid_allowhwgamma = false;
 507                         VID_RestoreSystemGamma();
 508                         break;
 509                 }
 510         }
 511
 512         if (dowarp)
 513         {
 514                 /* move the mouse to the window center again */
 515                 p_mouse_x = scr_width / 2;
 516                 p_mouse_y = scr_height / 2;
 517                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 518         }
 519
 520 }
 521
 522 static void IN_DeactivateMouse( void )
 523 {
 524         if (!mouse_avail || !vidx11_display || !win)
 525                 return;
 526
 527         if (mouse_active)
 528         {
 529                 uninstall_grabs();
 530                 mouse_active = false;
 531         }
 532 }
 533
 534 static void IN_ActivateMouse( void )
 535 {
 536         if (!mouse_avail || !vidx11_display || !win)
 537                 return;
 538
 539         if (!mouse_active)
 540         {
 541                 mouse_x = mouse_y = 0; // don't spazz
 542                 install_grabs();
 543                 mouse_active = true;
 544         }
 545 }
 546
 547 void VID_Shutdown(void)
 548 {
 549         if (!ctx || !vidx11_display)
 550                 return;
 551
 552         vid_hidden = true;
 553         usingmouse = false;
 554         if (vidx11_display)
 555         {
 556                 VID_RestoreSystemGamma();
 557                 uninstall_grabs();
 558
 559                 // FIXME: glXDestroyContext here?
 560                 if (vidmode_active)
 561                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 562                 if (win)
 563                         XDestroyWindow(vidx11_display, win);
 564                 XCloseDisplay(vidx11_display);
 565         }
 566         vidmode_active = false;
 567         vidx11_display = NULL;
 568         win = 0;
 569         ctx = NULL;
 570
 571         GL_CloseLibrary();
 572 }
 573
 574 void signal_handler(int sig)
 575 {
 576         printf("Received signal %d, exiting...\n", sig);
 577         VID_RestoreSystemGamma();
 578         Sys_Quit();
 579         exit(0);
 580 }
 581
 582 void InitSig(void)
 583 {
 584         signal(SIGHUP, signal_handler);
 585         signal(SIGINT, signal_handler);
 586         signal(SIGQUIT, signal_handler);
 587         signal(SIGILL, signal_handler);
 588         signal(SIGTRAP, signal_handler);
 589         signal(SIGIOT, signal_handler);
 590         signal(SIGBUS, signal_handler);
 591         signal(SIGFPE, signal_handler);
 592         signal(SIGSEGV, signal_handler);
 593         signal(SIGTERM, signal_handler);
 594 }
 595
 596 /*
 597 =================
 598 VID_GetWindowSize
 599 =================
 600 */
 601 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 602 {
 603         *x = *y = 0;
 604         *width = scr_width;
 605         *height = scr_height;
 606 }
 607
 608 void VID_Finish (void)
 609 {
 610         int usemouse;
 611         if (r_render.integer)
 612         {
 613                 qglFinish();
 614                 qglXSwapBuffers(vidx11_display, win);
 615         }
 616
 617 // handle the mouse state when windowed if that's changed
 618         usemouse = false;
 619         if (vid_mouse.integer && !key_consoleactive)
 620                 usemouse = true;
 621         if (vidmode_active)
 622                 usemouse = true;
 623         if (usemouse)
 624         {
 625                 if (!usingmouse)
 626                 {
 627                         usingmouse = true;
 628                         IN_ActivateMouse ();
 629                 }
 630         }
 631         else
 632         {
 633                 if (usingmouse)
 634                 {
 635                         usingmouse = false;
 636                         IN_DeactivateMouse ();
 637                 }
 638         }
 639 }
 640
 641 int VID_SetGamma(unsigned short *ramps)
 642 {
 643         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 644 }
 645
 646 int VID_GetGamma(unsigned short *ramps)
 647 {
 648         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 649 }
 650
 651 void VID_Init(void)
 652 {
 653         Cvar_RegisterVariable (&vid_dga);
 654         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 655         InitSig(); // trap evil signals
 656         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 657                 mouse_avail = false;
 658 }
 659
 660 void VID_BuildGLXAttrib(int *attrib, int stencil)
 661 {
 662         *attrib++ = GLX_RGBA;
 663         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 664         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 665         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 666         *attrib++ = GLX_DOUBLEBUFFER;
 667         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 668         // if stencil is enabled, ask for alpha too
 669         if (stencil)
 670         {
 671                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 672                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 673         }
 674         *attrib++ = None;
 675 }
 676
 677 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
 678 {
 679         int i;
 680         int attrib[32];
 681         XSetWindowAttributes attr;
 682         unsigned long mask;
 683         Window root;
 684         XVisualInfo *visinfo;
 685         int MajorVersion, MinorVersion;
 686         const char *drivername;
 687
 688         drivername = "libGL.so.1";
 689         i = COM_CheckParm("-gl_driver");
 690         if (i && i < com_argc - 1)
 691                 drivername = com_argv[i + 1];
 692         if (!GL_OpenLibrary(drivername))
 693         {
 694                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 695                 return false;
 696         }
 697
 698         if (!(vidx11_display = XOpenDisplay(NULL)))
 699         {
 700                 Con_Printf("Couldn't open the X display\n");
 701                 return false;
 702         }
 703
 704         vidx11_screen = DefaultScreen(vidx11_display);
 705         root = RootWindow(vidx11_display, vidx11_screen);
 706
 707         // Get video mode list
 708         MajorVersion = MinorVersion = 0;
 709         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 710                 vidmode_ext = false;
 711         else
 712         {
 713                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 714                 vidmode_ext = true;
 715         }
 716
 717         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 718          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 719          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 720          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 721          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 722         {
 723                 Con_Printf("glX functions not found in %s\n", gl_driver);
 724                 return false;
 725         }
 726
 727         VID_BuildGLXAttrib(attrib, stencil);
 728         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 729         if (!visinfo)
 730         {
 731                 Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
 732                 return false;
 733         }
 734
 735         if (vidmode_ext)
 736         {
 737                 int best_fit, best_dist, dist, x, y;
 738
 739                 // Are we going fullscreen?  If so, let's change video mode
 740                 if (fullscreen)
 741                 {
 742                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 743                         best_dist = 9999999;
 744                         best_fit = -1;
 745
 746                         for (i = 0; i < num_vidmodes; i++)
 747                         {
 748                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 749                                         continue;
 750
 751                                 x = width - vidmodes[i]->hdisplay;
 752                                 y = height - vidmodes[i]->vdisplay;
 753                                 dist = (x * x) + (y * y);
 754                                 if (dist < best_dist)
 755                                 {
 756                                         best_dist = dist;
 757                                         best_fit = i;
 758                                 }
 759                         }
 760
 761                         if (best_fit != -1)
 762                         {
 763                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 764                                 // to width/height =, so the window will take the full area of
 765                                 // the mode chosen
 766                                 width = vidmodes[best_fit]->hdisplay;
 767                                 height = vidmodes[best_fit]->vdisplay;
 768
 769                                 // change to the mode
 770                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 771                                 vidmode_active = true;
 772
 773                                 // Move the viewport to top left
 774                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 775                         }
 776                         else
 777                                 fullscreen = 0;
 778                 }
 779         }
 780
 781         // LordHavoc: save the visual for use in gamma ramp settings later
 782         vidx11_visual = visinfo->visual;
 783
 784         /* window attributes */
 785         attr.background_pixel = 0;
 786         attr.border_pixel = 0;
 787         // LordHavoc: save the colormap for later, too
 788         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 789         attr.event_mask = X_MASK;
 790         if (vidmode_active)
 791         {
 792                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 793                 attr.override_redirect = True;
 794                 attr.backing_store = NotUseful;
 795                 attr.save_under = False;
 796         }
 797         else
 798                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 799
 800         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 801         XStoreName(vidx11_display, win, gamename);
 802         XMapWindow(vidx11_display, win);
 803
 804         // LordHavoc: making the close button on a window do the right thing
 805         // seems to involve this mess, sigh...
 806         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 807         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 808
 809         if (vidmode_active)
 810         {
 811                 XMoveWindow(vidx11_display, win, 0, 0);
 812                 XRaiseWindow(vidx11_display, win);
 813                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 814                 XFlush(vidx11_display);
 815                 // Move the viewport to top left
 816                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 817         }
 818
 819         //XSync(vidx11_display, False);
 820
 821         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 822         if (!ctx)
 823                 Sys_Error ("glXCreateContext failed\n");
 824
 825         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 826                 Sys_Error ("glXMakeCurrent failed\n");
 827
 828         XSync(vidx11_display, False);
 829
 830         scr_width = width;
 831         scr_height = height;
 832
 833         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 834                 Sys_Error("glGetString not found in %s", gl_driver);
 835
 836         gl_renderer = qglGetString(GL_RENDERER);
 837         gl_vendor = qglGetString(GL_VENDOR);
 838         gl_version = qglGetString(GL_VERSION);
 839         gl_extensions = qglGetString(GL_EXTENSIONS);
 840         gl_platform = "GLX";
 841         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 842
 843         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 844         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
 845
 846         usingmouse = false;
 847         vid_hidden = false;
 848         vid_allowhwgamma = true;
 849         GL_Init();
 850         return true;
 851 }
 852
 853 void Sys_SendKeyEvents(void)
 854 {
 855         HandleEvents();
 856 }
 857
 858 /*
 859 ===========
 860 IN_Commands
 861 ===========
 862 */
 863 void IN_Commands (void)
 864 {
 865 }
 866
 867 void IN_Move (usercmd_t *cmd)
 868 {
 869         if (mouse_avail)
 870                 IN_Mouse(cmd, mouse_x, mouse_y);
 871         mouse_x = 0;
 872         mouse_y = 0;
 873 }
 874
 875 static void *prjobj = NULL;
 876
 877 int GL_OpenLibrary(const char *name)
 878 {
 879         Con_Printf("Loading OpenGL driver %s\n", name);
 880         GL_CloseLibrary();
 881         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 882         {
 883                 Con_Printf("Unable to open symbol list for %s\n", name);
 884                 return false;
 885         }
 886         strcpy(gl_driver, name);
 887         return true;
 888 }
 889
 890 void GL_CloseLibrary(void)
 891 {
 892         if (prjobj)
 893                 dlclose(prjobj);
 894         prjobj = NULL;
 895         gl_driver[0] = 0;
 896         qglXGetProcAddressARB = NULL;
 897         gl_extensions = "";
 898         gl_platform = "";
 899         gl_platformextensions = "";
 900 }
 901
 902 void *GL_GetProcAddress(const char *name)
 903 {
 904         void *p = NULL;
 905         if (qglXGetProcAddressARB != NULL)
 906                 p = (void *) qglXGetProcAddressARB(name);
 907         if (p == NULL)
 908                 p = (void *) dlsym(prjobj, name);
 909         return p;
 910 }
 911