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 gl_extensionfunctionlist_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)(int divisor, int remainder, unsigned int *count);
  65
  66 static gl_extensionfunctionlist_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 scrnum;
  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 | StructureNotifyMask )
  84
  85
  86 static qboolean         mouse_avail = true;
  87 static qboolean         mouse_active = false, usingmouse = false;
  88 static float    mouse_x, mouse_y;
  89 static int p_mouse_x, p_mouse_y;
  90
  91 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
  92 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
  93
  94 qboolean vidmode_ext = false;
  95
  96 static int win_x, win_y;
  97
  98 static int scr_width, scr_height;
  99
 100 static XF86VidModeModeInfo **vidmodes;
 101 static int num_vidmodes;
 102 static qboolean vidmode_active = false;
 103
 104 static Visual *vidx11_visual;
 105 static Colormap vidx11_colormap;
 106
 107 /*-----------------------------------------------------------------------*/
 108
 109 static int
 110 XLateKey(XKeyEvent *ev)
 111 {
 112         int key = 0;
 113         KeySym keysym;
 114
 115         keysym = XLookupKeysym(ev, 0);
 116
 117         switch(keysym)
 118         {
 119                 case XK_KP_Page_Up:     key = KP_PGUP; break;
 120                 case XK_Page_Up:        key = K_PGUP; break;
 121
 122                 case XK_KP_Page_Down:   key = KP_PGDN; break;
 123                 case XK_Page_Down:      key = K_PGDN; break;
 124
 125                 case XK_KP_Home:        key = KP_HOME; break;
 126                 case XK_Home:           key = K_HOME; break;
 127
 128                 case XK_KP_End:         key = KP_END; break;
 129                 case XK_End:            key = K_END; break;
 130
 131                 case XK_KP_Left:        key = KP_LEFTARROW; break;
 132                 case XK_Left:           key = K_LEFTARROW; break;
 133
 134                 case XK_KP_Right:       key = KP_RIGHTARROW; break;
 135                 case XK_Right:          key = K_RIGHTARROW; break;
 136
 137                 case XK_KP_Down:        key = KP_DOWNARROW; break;
 138                 case XK_Down:           key = K_DOWNARROW; break;
 139
 140                 case XK_KP_Up:          key = KP_UPARROW; break;
 141                 case XK_Up:                     key = K_UPARROW; break;
 142
 143                 case XK_Escape:         key = K_ESCAPE; break;
 144
 145                 case XK_KP_Enter:       key = KP_ENTER; break;
 146                 case XK_Return:         key = K_ENTER; break;
 147
 148                 case XK_Tab:            key = K_TAB; break;
 149
 150                 case XK_F1:                     key = K_F1; break;
 151                 case XK_F2:                     key = K_F2; break;
 152                 case XK_F3:                     key = K_F3; break;
 153                 case XK_F4:                     key = K_F4; break;
 154                 case XK_F5:                     key = K_F5; break;
 155                 case XK_F6:                     key = K_F6; break;
 156                 case XK_F7:                     key = K_F7; break;
 157                 case XK_F8:                     key = K_F8; break;
 158                 case XK_F9:                     key = K_F9; break;
 159                 case XK_F10:            key = K_F10; break;
 160                 case XK_F11:            key = K_F11; break;
 161                 case XK_F12:            key = K_F12; break;
 162
 163                 case XK_BackSpace:      key = K_BACKSPACE; break;
 164
 165                 case XK_KP_Delete:      key = KP_DEL; break;
 166                 case XK_Delete:         key = K_DEL; break;
 167
 168                 case XK_Pause:          key = K_PAUSE; break;
 169
 170                 case XK_Shift_L:
 171                 case XK_Shift_R:        key = K_SHIFT; break;
 172
 173                 case XK_Execute:
 174                 case XK_Control_L:
 175                 case XK_Control_R:      key = K_CTRL; break;
 176
 177                 case XK_Mode_switch:
 178                 case XK_Alt_L:
 179                 case XK_Meta_L:
 180                 case XK_Alt_R:
 181                 case XK_Meta_R:         key = K_ALT; break;
 182
 183                 case XK_Caps_Lock:      key = K_CAPSLOCK; break;
 184                 case XK_KP_Begin:       key = KP_5; break;
 185
 186                 case XK_Insert:         key = K_INS; break;
 187                 case XK_KP_Insert:      key = KP_INS; break;
 188
 189                 case XK_KP_Multiply:    key = KP_MULTIPLY; break;
 190                 case XK_KP_Add:         key = KP_PLUS; break;
 191                 case XK_KP_Subtract:    key = KP_MINUS; break;
 192                 case XK_KP_Divide:      key = KP_DIVIDE; break;
 193
 194                 /* For Sun keyboards */
 195                 case XK_F27:            key = K_HOME; break;
 196                 case XK_F29:            key = K_PGUP; break;
 197                 case XK_F33:            key = K_END; break;
 198                 case XK_F35:            key = K_PGDN; break;
 199
 200                 default:
 201                         if (keysym < 128)
 202                         {
 203                                 /* ASCII keys */
 204                                 key = keysym;
 205                                 if ((key >= 'A') && (key <= 'Z'))
 206                                         key = key + ('a' - 'A');
 207                         }
 208                         break;
 209         }
 210
 211         return key;
 212 }
 213
 214 static Cursor CreateNullCursor(Display *display, Window root)
 215 {
 216         Pixmap cursormask;
 217         XGCValues xgc;
 218         GC gc;
 219         XColor dummycolour;
 220         Cursor cursor;
 221
 222         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 223         xgc.function = GXclear;
 224         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 225         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 226         dummycolour.pixel = 0;
 227         dummycolour.red = 0;
 228         dummycolour.flags = 04;
 229         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 230         XFreePixmap(display,cursormask);
 231         XFreeGC(display,gc);
 232         return cursor;
 233 }
 234
 235 static void install_grabs(void)
 236 {
 237         XWindowAttributes attribs_1;
 238         XSetWindowAttributes attribs_2;
 239
 240         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 241         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 242         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 243
 244 // inviso cursor
 245         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 246
 247         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 248
 249         if (vid_dga.integer)
 250         {
 251                 int MajorVersion, MinorVersion;
 252
 253                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 254                 {
 255                         // unable to query, probalby not supported
 256                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
 257                         vid_dga.integer = 0;
 258                 }
 259                 else
 260                 {
 261                         vid_dga.integer = 1;
 262                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 263                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 264                 }
 265         }
 266         else
 267                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
 268
 269         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 270
 271         mouse_active = true;
 272         mouse_x = mouse_y = 0;
 273 }
 274
 275 static void uninstall_grabs(void)
 276 {
 277         if (!vidx11_display || !win)
 278                 return;
 279
 280         if (vid_dga.integer == 1)
 281                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 282
 283         XUngrabPointer(vidx11_display, CurrentTime);
 284         XUngrabKeyboard(vidx11_display, CurrentTime);
 285
 286 // inviso cursor
 287         XUndefineCursor(vidx11_display, win);
 288
 289         mouse_active = false;
 290 }
 291
 292 static void HandleEvents(void)
 293 {
 294         XEvent event;
 295         qboolean dowarp = false;
 296
 297         if (!vidx11_display)
 298                 return;
 299
 300         while (XPending(vidx11_display))
 301         {
 302                 XNextEvent(vidx11_display, &event);
 303
 304                 switch (event.type)
 305                 {
 306                 case KeyPress:
 307                         // key pressed
 308                         Key_Event(XLateKey(&event.xkey), true);
 309                         break;
 310
 311                 case KeyRelease:
 312                         // key released
 313                         Key_Event(XLateKey(&event.xkey), false);
 314                         break;
 315
 316                 case MotionNotify:
 317                         // mouse moved
 318                         if (usingmouse)
 319                         {
 320                                 if (vid_dga.integer == 1)
 321                                 {
 322                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 323                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 324                                 }
 325                                 else
 326                                 {
 327
 328                                         if (!event.xmotion.send_event)
 329                                         {
 330                                                 mouse_x += event.xmotion.x - p_mouse_x;
 331                                                 mouse_y += event.xmotion.y - p_mouse_y;
 332                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 333                                                         dowarp = true;
 334                                         }
 335                                         p_mouse_x = event.xmotion.x;
 336                                         p_mouse_y = event.xmotion.y;
 337                                 }
 338                         }
 339                         else
 340                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 341                         break;
 342
 343                 case ButtonPress:
 344                         // mouse button pressed
 345                         switch(event.xbutton.button)
 346                         {
 347                         case 1:
 348                                 Key_Event(K_MOUSE1, true);
 349                                 break;
 350                         case 2:
 351                                 Key_Event(K_MOUSE3, true);
 352                                 break;
 353                         case 3:
 354                                 Key_Event(K_MOUSE2, true);
 355                                 break;
 356                         case 4:
 357                                 Key_Event(K_MWHEELUP, true);
 358                                 break;
 359                         case 5:
 360                                 Key_Event(K_MWHEELDOWN, true);
 361                                 break;
 362                 default:
 363                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-5 expected\n", event.xbutton.button);
 364                                 break;
 365                         }
 366                         break;
 367
 368                 case ButtonRelease:
 369                         // mouse button released
 370                         switch(event.xbutton.button)
 371                         {
 372                         case 1:
 373                                 Key_Event(K_MOUSE1, false);
 374                                 break;
 375                         case 2:
 376                                 Key_Event(K_MOUSE3, false);
 377                                 break;
 378                         case 3:
 379                                 Key_Event(K_MOUSE2, false);
 380                                 break;
 381                         case 4:
 382                                 Key_Event(K_MWHEELUP, false);
 383                                 break;
 384                         case 5:
 385                                 Key_Event(K_MWHEELDOWN, false);
 386                                 break;
 387                 default:
 388                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-5 expected\n", event.xbutton.button);
 389                                 break;
 390                         }
 391                         break;
 392
 393                 case CreateNotify:
 394                         // window created
 395                         win_x = event.xcreatewindow.x;
 396                         win_y = event.xcreatewindow.y;
 397                         break;
 398
 399                 case ConfigureNotify:
 400                         // window changed size/location
 401                         win_x = event.xconfigure.x;
 402                         win_y = event.xconfigure.y;
 403                         break;
 404                 case DestroyNotify:
 405                         // window has been destroyed
 406                         Sys_Quit();
 407                         break;
 408                 case ClientMessage:
 409                         // window manager messages
 410                         if ((event.xclient.format == 32) && (event.xclient.data.l[0] == wm_delete_window_atom))
 411                                 Sys_Quit();
 412                         break;
 413                 case MapNotify:
 414                         // window restored
 415                         vid_hidden = false;
 416                         break;
 417                 case UnmapNotify:
 418                         // window iconified/rolledup/whatever
 419                         vid_hidden = true;
 420                         break;
 421                 case FocusIn:
 422                         // window is now the input focus
 423                         break;
 424                 case FocusOut:
 425                         // window is no longer the input focus
 426                         break;
 427                 case EnterNotify:
 428                         // mouse entered window
 429                         break;
 430                 case LeaveNotify:
 431                         // mouse left window
 432                         break;
 433                 }
 434         }
 435
 436         if (dowarp)
 437         {
 438                 /* move the mouse to the window center again */
 439                 p_mouse_x = scr_width / 2;
 440                 p_mouse_y = scr_height / 2;
 441                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 442         }
 443
 444 }
 445
 446 static void IN_DeactivateMouse( void )
 447 {
 448         if (!mouse_avail || !vidx11_display || !win)
 449                 return;
 450
 451         if (mouse_active)
 452         {
 453                 uninstall_grabs();
 454                 mouse_active = false;
 455         }
 456 }
 457
 458 static void IN_ActivateMouse( void )
 459 {
 460         if (!mouse_avail || !vidx11_display || !win)
 461                 return;
 462
 463         if (!mouse_active)
 464         {
 465                 mouse_x = mouse_y = 0; // don't spazz
 466                 install_grabs();
 467                 mouse_active = true;
 468         }
 469 }
 470
 471
 472 void VID_Shutdown(void)
 473 {
 474         if (!ctx || !vidx11_display)
 475                 return;
 476
 477         vid_hidden = true;
 478         usingmouse = false;
 479         if (vidx11_display)
 480         {
 481                 uninstall_grabs();
 482
 483                 // FIXME: glXDestroyContext here?
 484                 if (vidmode_active)
 485                         XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[0]);
 486                 if (win)
 487                         XDestroyWindow(vidx11_display, win);
 488                 XCloseDisplay(vidx11_display);
 489         }
 490         vidmode_active = false;
 491         vidx11_display = NULL;
 492         win = 0;
 493         ctx = NULL;
 494
 495         GL_CloseLibrary();
 496 }
 497
 498 void signal_handler(int sig)
 499 {
 500         printf("Received signal %d, exiting...\n", sig);
 501         Sys_Quit();
 502         exit(0);
 503 }
 504
 505 void InitSig(void)
 506 {
 507         signal(SIGHUP, signal_handler);
 508         signal(SIGINT, signal_handler);
 509         signal(SIGQUIT, signal_handler);
 510         signal(SIGILL, signal_handler);
 511         signal(SIGTRAP, signal_handler);
 512         signal(SIGIOT, signal_handler);
 513         signal(SIGBUS, signal_handler);
 514         signal(SIGFPE, signal_handler);
 515         signal(SIGSEGV, signal_handler);
 516         signal(SIGTERM, signal_handler);
 517 }
 518
 519 /*
 520 =================
 521 VID_GetWindowSize
 522 =================
 523 */
 524 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 525 {
 526         *x = *y = 0;
 527         *width = scr_width;
 528         *height = scr_height;
 529 }
 530
 531 void VID_Finish (void)
 532 {
 533         int usemouse;
 534         if (r_render.integer)
 535         {
 536                 qglFinish();
 537                 qglXSwapBuffers(vidx11_display, win);
 538         }
 539
 540 // handle the mouse state when windowed if that's changed
 541         usemouse = false;
 542         if (vid_mouse.integer && !key_consoleactive)
 543                 usemouse = true;
 544         if (vidmode_active)
 545                 usemouse = true;
 546         if (usemouse)
 547         {
 548                 if (!usingmouse)
 549                 {
 550                         usingmouse = true;
 551                         IN_ActivateMouse ();
 552                 }
 553         }
 554         else
 555         {
 556                 if (usingmouse)
 557                 {
 558                         usingmouse = false;
 559                         IN_DeactivateMouse ();
 560                 }
 561         }
 562 }
 563
 564 // LordHavoc: ported from SDL 1.2.2, this was far more difficult to port from
 565 // SDL than to simply use the XFree gamma ramp extension, but that affects the
 566 // whole screen even when the game window is inactive, this only affects the
 567 // screen while the window is active, very desirable behavior :)
 568 int VID_SetGamma(float prescale, float gamma, float scale, float base)
 569 {
 570 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
 571 #if 1
 572         return FALSE;
 573 #else
 574         int i, ncolors, c;
 575         unsigned int Rmask, Gmask, Bmask, Rloss, Gloss, Bloss, Rshift, Gshift, Bshift, mask;
 576         XColor xcmap[256];
 577         unsigned short ramp[256];
 578
 579         if (COM_CheckParm("-nogamma"))
 580                 return FALSE;
 581
 582         if (vidx11_visual->class != DirectColor)
 583         {
 584                 Con_Printf("X11 Visual class is %d, can only do gamma on %d\n", vidx11_visual->class, DirectColor);
 585                 return FALSE;
 586         }
 587
 588         Rmask = vidx11_visual->red_mask;
 589         Gmask = vidx11_visual->green_mask;
 590         Bmask = vidx11_visual->blue_mask;
 591
 592         Rshift = 0;
 593         Rloss = 8;
 594         if ((mask = Rmask))
 595         {
 596                 for (;!(mask & 1);mask >>= 1)
 597                         ++Rshift;
 598                 for (;(mask & 1);mask >>= 1)
 599                         --Rloss;
 600         }
 601         Gshift = 0;
 602         Gloss = 8;
 603         if ((mask = Gmask))
 604         {
 605                 for (;!(mask & 1);mask >>= 1)
 606                         ++Gshift;
 607                 for (;(mask & 1);mask >>= 1)
 608                         --Gloss;
 609         }
 610         Bshift = 0;
 611         Bloss = 8;
 612         if ((mask = Bmask))
 613         {
 614                 for (;!(mask & 1);mask >>= 1)
 615                         ++Bshift;
 616                 for (;(mask & 1);mask >>= 1)
 617                         --Bloss;
 618         }
 619
 620         BuildGammaTable16(prescale, gamma, scale, base, ramp);
 621
 622         // convert gamma ramp to palette (yes this seems odd)
 623         ncolors = vidx11_visual->map_entries;
 624         for (i = 0;i < ncolors;i++)
 625         {
 626                 c = (256 * i / ncolors);
 627                 xcmap[i].pixel = ((c >> Rloss) << Rshift) | ((c >> Gloss) << Gshift) | ((c >> Bloss) << Bshift);
 628                 xcmap[i].red   = ramp[c];
 629                 xcmap[i].green = ramp[c];
 630                 xcmap[i].blue  = ramp[c];
 631                 xcmap[i].flags = (DoRed|DoGreen|DoBlue);
 632         }
 633         XStoreColors(vidx11_display, vidx11_colormap, xcmap, ncolors);
 634         XSync(vidx11_display, false);
 635         // FIXME: should this check for BadAccess/BadColor/BadValue errors produced by XStoreColors before setting this true?
 636         return TRUE;
 637 #endif
 638 }
 639
 640 void VID_Init(void)
 641 {
 642         Cvar_RegisterVariable (&vid_dga);
 643         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 644         InitSig(); // trap evil signals
 645         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 646                 mouse_avail = false;
 647 }
 648
 649 void VID_BuildGLXAttrib(int *attrib, int stencil, int gamma)
 650 {
 651         *attrib++ = GLX_RGBA;
 652         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 653         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 654         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 655         *attrib++ = GLX_DOUBLEBUFFER;
 656         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 657         if (stencil)
 658         {
 659                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 660         }
 661         if (gamma)
 662         {
 663                 *attrib++ = GLX_X_VISUAL_TYPE;*attrib++ = GLX_DIRECT_COLOR;
 664         };
 665         *attrib++ = None;
 666 }
 667
 668 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
 669 {
 670         int i;
 671         int attrib[32];
 672         XSetWindowAttributes attr;
 673         unsigned long mask;
 674         Window root;
 675         XVisualInfo *visinfo;
 676         int MajorVersion, MinorVersion;
 677         const char *drivername;
 678
 679         drivername = "libGL.so.1";
 680         i = COM_CheckParm("-gl_driver");
 681         if (i && i < com_argc - 1)
 682                 drivername = com_argv[i + 1];
 683         if (!GL_OpenLibrary(drivername))
 684         {
 685                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 686                 return false;
 687         }
 688
 689         if (!(vidx11_display = XOpenDisplay(NULL)))
 690         {
 691                 Con_Printf("Couldn't open the X display\n");
 692                 return false;
 693         }
 694
 695         scrnum = DefaultScreen(vidx11_display);
 696         root = RootWindow(vidx11_display, scrnum);
 697
 698         // Get video mode list
 699         MajorVersion = MinorVersion = 0;
 700         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 701                 vidmode_ext = false;
 702         else
 703         {
 704                 Con_Printf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 705                 vidmode_ext = true;
 706         }
 707
 708         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 709          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 710          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 711          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 712          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 713         {
 714                 Con_Printf("glX functions not found in %s\n", gl_driver);
 715                 return false;
 716         }
 717
 718         visinfo = NULL;
 719 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
 720 #if 0
 721         if (!COM_CheckParm("-nogamma"))
 722         {
 723                 VID_BuildGLXAttrib(attrib, stencil, true);
 724                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
 725         }
 726 #endif
 727         if (!visinfo)
 728         {
 729                 VID_BuildGLXAttrib(attrib, stencil, false);
 730                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
 731                 if (!visinfo)
 732                 {
 733                         Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
 734                         return false;
 735                 }
 736         }
 737
 738         if (vidmode_ext)
 739         {
 740                 int best_fit, best_dist, dist, x, y;
 741
 742                 XF86VidModeGetAllModeLines(vidx11_display, scrnum, &num_vidmodes, &vidmodes);
 743
 744                 // Are we going fullscreen?  If so, let's change video mode
 745                 if (fullscreen)
 746                 {
 747                         best_dist = 9999999;
 748                         best_fit = -1;
 749
 750                         for (i = 0; i < num_vidmodes; i++)
 751                         {
 752                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 753                                         continue;
 754
 755                                 x = width - vidmodes[i]->hdisplay;
 756                                 y = height - vidmodes[i]->vdisplay;
 757                                 dist = (x * x) + (y * y);
 758                                 if (dist < best_dist)
 759                                 {
 760                                         best_dist = dist;
 761                                         best_fit = i;
 762                                 }
 763                         }
 764
 765                         if (best_fit != -1)
 766                         {
 767                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 768                                 // to width/height =, so the window will take the full area of
 769                                 // the mode chosen
 770                                 width = vidmodes[best_fit]->hdisplay;
 771                                 height = vidmodes[best_fit]->vdisplay;
 772
 773                                 // change to the mode
 774                                 XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[best_fit]);
 775                                 vidmode_active = true;
 776
 777                                 // Move the viewport to top left
 778                                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
 779                         }
 780                         else
 781                                 fullscreen = 0;
 782                 }
 783         }
 784
 785         // LordHavoc: save the visual for use in gamma ramp settings later
 786         vidx11_visual = visinfo->visual;
 787
 788         /* window attributes */
 789         attr.background_pixel = 0;
 790         attr.border_pixel = 0;
 791         // LordHavoc: save the colormap for later, too
 792         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 793         attr.event_mask = X_MASK;
 794         if (vidmode_active)
 795         {
 796                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 797                 attr.override_redirect = True;
 798                 attr.backing_store = NotUseful;
 799                 attr.save_under = False;
 800         }
 801         else
 802                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 803
 804         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 805         XStoreName(vidx11_display, win, gamename);
 806         XMapWindow(vidx11_display, win);
 807
 808         // LordHavoc: making the close button on a window do the right thing
 809         // seems to involve this mess, sigh...
 810         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 811         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 812
 813         if (vidmode_active)
 814         {
 815                 XMoveWindow(vidx11_display, win, 0, 0);
 816                 XRaiseWindow(vidx11_display, win);
 817                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 818                 XFlush(vidx11_display);
 819                 // Move the viewport to top left
 820                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
 821         }
 822
 823         //XSync(vidx11_display, False);
 824
 825         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 826         if (!ctx)
 827                 Sys_Error ("glXCreateContext failed\n");
 828
 829         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 830                 Sys_Error ("glXMakeCurrent failed\n");
 831
 832         XSync(vidx11_display, False);
 833
 834         scr_width = width;
 835         scr_height = height;
 836
 837         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 838                 Sys_Error("glGetString not found in %s", gl_driver);
 839
 840         gl_renderer = qglGetString(GL_RENDERER);
 841         gl_vendor = qglGetString(GL_VENDOR);
 842         gl_version = qglGetString(GL_VERSION);
 843         gl_extensions = qglGetString(GL_EXTENSIONS);
 844         gl_platform = "GLX";
 845         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, scrnum);
 846
 847         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 848         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
 849
 850         usingmouse = false;
 851         vid_hidden = false;
 852         GL_Init();
 853         return true;
 854 }
 855
 856 void Sys_SendKeyEvents(void)
 857 {
 858         HandleEvents();
 859 }
 860
 861 /*
 862 ===========
 863 IN_Commands
 864 ===========
 865 */
 866 void IN_Commands (void)
 867 {
 868 }
 869
 870 void IN_Move (usercmd_t *cmd)
 871 {
 872         if (mouse_avail)
 873                 IN_Mouse(cmd, mouse_x, mouse_y);
 874         mouse_x = 0;
 875         mouse_y = 0;
 876 }
 877
 878 static void *prjobj = NULL;
 879
 880 int GL_OpenLibrary(const char *name)
 881 {
 882         Con_Printf("Loading GL driver %s\n", name);
 883         GL_CloseLibrary();
 884         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 885         {
 886                 Con_Printf("Unable to open symbol list for %s\n", name);
 887                 return false;
 888         }
 889         strcpy(gl_driver, name);
 890         return true;
 891 }
 892
 893 void GL_CloseLibrary(void)
 894 {
 895         if (prjobj)
 896                 dlclose(prjobj);
 897         prjobj = NULL;
 898         gl_driver[0] = 0;
 899         qglXGetProcAddressARB = NULL;
 900         gl_extensions = "";
 901         gl_platform = "";
 902         gl_platformextensions = "";
 903 }
 904
 905 void *GL_GetProcAddress(const char *name)
 906 {
 907         void *p = NULL;
 908         if (qglXGetProcAddressARB != NULL)
 909                 p = (void *) qglXGetProcAddressARB(name);
 910         if (p == NULL)
 911                 p = (void *) dlsym(prjobj, name);
 912         return p;
 913 }