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, char *ascii)
 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         *ascii = buf[0];
 120
 121         switch(keysym)
 122         {
 123                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 124                 case XK_Page_Up:         key = K_PGUP; break;
 125
 126                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 127                 case XK_Page_Down:       key = K_PGDN; break;
 128
 129                 case XK_KP_Home: key = K_KP_HOME; break;
 130                 case XK_Home:    key = K_HOME; break;
 131
 132                 case XK_KP_End:  key = K_KP_END; break;
 133                 case XK_End:     key = K_END; break;
 134
 135                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 136                 case XK_Left:    key = K_LEFTARROW; break;
 137
 138                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 139                 case XK_Right:  key = K_RIGHTARROW;             break;
 140
 141                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 142                 case XK_Down:    key = K_DOWNARROW; break;
 143
 144                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 145                 case XK_Up:              key = K_UPARROW;        break;
 146
 147                 case XK_Escape: key = K_ESCAPE;         break;
 148
 149                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 150                 case XK_Return: key = K_ENTER;           break;
 151
 152                 case XK_Tab:            key = K_TAB;                     break;
 153
 154                 case XK_F1:              key = K_F1;                            break;
 155
 156                 case XK_F2:              key = K_F2;                            break;
 157
 158                 case XK_F3:              key = K_F3;                            break;
 159
 160                 case XK_F4:              key = K_F4;                            break;
 161
 162                 case XK_F5:              key = K_F5;                            break;
 163
 164                 case XK_F6:              key = K_F6;                            break;
 165
 166                 case XK_F7:              key = K_F7;                            break;
 167
 168                 case XK_F8:              key = K_F8;                            break;
 169
 170                 case XK_F9:              key = K_F9;                            break;
 171
 172                 case XK_F10:            key = K_F10;                     break;
 173
 174                 case XK_F11:            key = K_F11;                     break;
 175
 176                 case XK_F12:            key = K_F12;                     break;
 177
 178                 case XK_BackSpace: key = K_BACKSPACE; break;
 179
 180                 case XK_KP_Delete: key = K_KP_DEL; break;
 181                 case XK_Delete: key = K_DEL; break;
 182
 183                 case XK_Pause:  key = K_PAUSE;           break;
 184
 185                 case XK_Shift_L:
 186                 case XK_Shift_R:        key = K_SHIFT;          break;
 187
 188                 case XK_Execute:
 189                 case XK_Control_L:
 190                 case XK_Control_R:      key = K_CTRL;            break;
 191
 192                 case XK_Alt_L:
 193                 case XK_Meta_L:
 194                 case XK_Alt_R:
 195                 case XK_Meta_R: key = K_ALT;                    break;
 196
 197                 case XK_KP_Begin: key = K_KP_5; break;
 198
 199                 case XK_Insert:key = K_INS; break;
 200                 case XK_KP_Insert: key = K_KP_INS; break;
 201
 202                 case XK_KP_Multiply: key = '*'; break;
 203                 case XK_KP_Add:  key = K_KP_PLUS; break;
 204                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 205                 case XK_KP_Divide: key = K_KP_SLASH; break;
 206
 207                 default:
 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         int key;
 296         char ascii;
 297         qboolean dowarp = false;
 298
 299         if (!vidx11_display)
 300                 return;
 301
 302         while (XPending(vidx11_display))
 303         {
 304                 XNextEvent(vidx11_display, &event);
 305
 306                 switch (event.type)
 307                 {
 308                 case KeyPress:
 309                         // key pressed
 310                         key = XLateKey (&event.xkey, &ascii);
 311                         Key_Event(key, ascii, true);
 312                         break;
 313
 314                 case KeyRelease:
 315                         // key released
 316                         key = XLateKey (&event.xkey, &ascii);
 317                         Key_Event(key, ascii, false);
 318                         break;
 319
 320                 case MotionNotify:
 321                         // mouse moved
 322                         if (usingmouse)
 323                         {
 324                                 if (vid_dga.integer == 1)
 325                                 {
 326                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 327                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 328                                 }
 329                                 else
 330                                 {
 331
 332                                         if (!event.xmotion.send_event)
 333                                         {
 334                                                 mouse_x += event.xmotion.x - p_mouse_x;
 335                                                 mouse_y += event.xmotion.y - p_mouse_y;
 336                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 337                                                         dowarp = true;
 338                                         }
 339                                         p_mouse_x = event.xmotion.x;
 340                                         p_mouse_y = event.xmotion.y;
 341                                 }
 342                         }
 343                         else
 344                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 345                         break;
 346
 347                 case ButtonPress:
 348                         // mouse button pressed
 349                         switch(event.xbutton.button)
 350                         {
 351                         case 1:
 352                                 Key_Event(K_MOUSE1, 0, true);
 353                                 break;
 354                         case 2:
 355                                 Key_Event(K_MOUSE3, 0, true);
 356                                 break;
 357                         case 3:
 358                                 Key_Event(K_MOUSE2, 0, true);
 359                                 break;
 360                         case 4:
 361                                 Key_Event(K_MWHEELUP, 0, true);
 362                                 break;
 363                         case 5:
 364                                 Key_Event(K_MWHEELDOWN, 0, true);
 365                                 break;
 366                         case 6:
 367                                 Key_Event(K_MOUSE4, 0, true);
 368                                 break;
 369                         case 7:
 370                                 Key_Event(K_MOUSE5, 0, true);
 371                                 break;
 372                         case 8:
 373                                 Key_Event(K_MOUSE6, 0, true);
 374                                 break;
 375                         case 9:
 376                                 Key_Event(K_MOUSE7, 0, true);
 377                                 break;
 378                         case 10:
 379                                 Key_Event(K_MOUSE8, 0, true);
 380                                 break;
 381                         case 11:
 382                                 Key_Event(K_MOUSE9, 0, true);
 383                                 break;
 384                         case 12:
 385                                 Key_Event(K_MOUSE10, 0, true);
 386                                 break;
 387                         default:
 388                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-12 expected\n", event.xbutton.button);
 389                                 break;
 390                         }
 391                         break;
 392
 393                 case ButtonRelease:
 394                         // mouse button released
 395                         switch(event.xbutton.button)
 396                         {
 397                         case 1:
 398                                 Key_Event(K_MOUSE1, 0, false);
 399                                 break;
 400                         case 2:
 401                                 Key_Event(K_MOUSE3, 0, false);
 402                                 break;
 403                         case 3:
 404                                 Key_Event(K_MOUSE2, 0, false);
 405                                 break;
 406                         case 4:
 407                                 Key_Event(K_MWHEELUP, 0, false);
 408                                 break;
 409                         case 5:
 410                                 Key_Event(K_MWHEELDOWN, 0, false);
 411                                 break;
 412                         case 6:
 413                                 Key_Event(K_MOUSE4, 0, false);
 414                                 break;
 415                         case 7:
 416                                 Key_Event(K_MOUSE5, 0, false);
 417                                 break;
 418                         case 8:
 419                                 Key_Event(K_MOUSE6, 0, false);
 420                                 break;
 421                         case 9:
 422                                 Key_Event(K_MOUSE7, 0, false);
 423                                 break;
 424                         case 10:
 425                                 Key_Event(K_MOUSE8, 0, false);
 426                                 break;
 427                         case 11:
 428                                 Key_Event(K_MOUSE9, 0, false);
 429                                 break;
 430                         case 12:
 431                                 Key_Event(K_MOUSE10, 0, false);
 432                                 break;
 433                         default:
 434                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-12 expected\n", event.xbutton.button);
 435                                 break;
 436                         }
 437                         break;
 438
 439                 case CreateNotify:
 440                         // window created
 441                         win_x = event.xcreatewindow.x;
 442                         win_y = event.xcreatewindow.y;
 443                         break;
 444
 445                 case ConfigureNotify:
 446                         // window changed size/location
 447                         win_x = event.xconfigure.x;
 448                         win_y = event.xconfigure.y;
 449                         break;
 450                 case DestroyNotify:
 451                         // window has been destroyed
 452                         Sys_Quit();
 453                         break;
 454                 case ClientMessage:
 455                         // window manager messages
 456                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 457                                 Sys_Quit();
 458                         break;
 459                 case MapNotify:
 460                         // window restored
 461                         vid_hidden = false;
 462                         vid_allowhwgamma = true;
 463                         break;
 464                 case UnmapNotify:
 465                         // window iconified/rolledup/whatever
 466                         vid_hidden = true;
 467                         vid_allowhwgamma = false;
 468                         VID_RestoreSystemGamma();
 469                         break;
 470                 case FocusIn:
 471                         // window is now the input focus
 472                         vid_allowhwgamma = true;
 473                         break;
 474                 case FocusOut:
 475                         // window is no longer the input focus
 476                         vid_allowhwgamma = false;
 477                         VID_RestoreSystemGamma();
 478                         break;
 479                 case EnterNotify:
 480                         // mouse entered window
 481                         vid_allowhwgamma = true;
 482                         break;
 483                 case LeaveNotify:
 484                         // mouse left window
 485                         vid_allowhwgamma = false;
 486                         VID_RestoreSystemGamma();
 487                         break;
 488                 }
 489         }
 490
 491         if (dowarp)
 492         {
 493                 /* move the mouse to the window center again */
 494                 p_mouse_x = scr_width / 2;
 495                 p_mouse_y = scr_height / 2;
 496                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 497         }
 498
 499 }
 500
 501 static void IN_DeactivateMouse( void )
 502 {
 503         if (!mouse_avail || !vidx11_display || !win)
 504                 return;
 505
 506         if (mouse_active)
 507         {
 508                 uninstall_grabs();
 509                 mouse_active = false;
 510         }
 511 }
 512
 513 static void IN_ActivateMouse( void )
 514 {
 515         if (!mouse_avail || !vidx11_display || !win)
 516                 return;
 517
 518         if (!mouse_active)
 519         {
 520                 mouse_x = mouse_y = 0; // don't spazz
 521                 install_grabs();
 522                 mouse_active = true;
 523         }
 524 }
 525
 526 void VID_Shutdown(void)
 527 {
 528         if (!ctx || !vidx11_display)
 529                 return;
 530
 531         vid_hidden = true;
 532         usingmouse = false;
 533         if (vidx11_display)
 534         {
 535                 VID_RestoreSystemGamma();
 536                 uninstall_grabs();
 537
 538                 // FIXME: glXDestroyContext here?
 539                 if (vidmode_active)
 540                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 541                 if (win)
 542                         XDestroyWindow(vidx11_display, win);
 543                 XCloseDisplay(vidx11_display);
 544         }
 545         vidmode_active = false;
 546         vidx11_display = NULL;
 547         win = 0;
 548         ctx = NULL;
 549
 550         GL_CloseLibrary();
 551 }
 552
 553 void signal_handler(int sig)
 554 {
 555         printf("Received signal %d, exiting...\n", sig);
 556         VID_RestoreSystemGamma();
 557         Sys_Quit();
 558         exit(0);
 559 }
 560
 561 void InitSig(void)
 562 {
 563         signal(SIGHUP, signal_handler);
 564         signal(SIGINT, signal_handler);
 565         signal(SIGQUIT, signal_handler);
 566         signal(SIGILL, signal_handler);
 567         signal(SIGTRAP, signal_handler);
 568         signal(SIGIOT, signal_handler);
 569         signal(SIGBUS, signal_handler);
 570         signal(SIGFPE, signal_handler);
 571         signal(SIGSEGV, signal_handler);
 572         signal(SIGTERM, signal_handler);
 573 }
 574
 575 /*
 576 =================
 577 VID_GetWindowSize
 578 =================
 579 */
 580 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 581 {
 582         *x = *y = 0;
 583         *width = scr_width;
 584         *height = scr_height;
 585 }
 586
 587 void VID_Finish (void)
 588 {
 589         int usemouse;
 590         if (r_render.integer)
 591         {
 592                 qglFinish();
 593                 qglXSwapBuffers(vidx11_display, win);
 594         }
 595
 596 // handle the mouse state when windowed if that's changed
 597         usemouse = false;
 598         if (vid_mouse.integer && !key_consoleactive)
 599                 usemouse = true;
 600         if (vidmode_active)
 601                 usemouse = true;
 602         if (usemouse)
 603         {
 604                 if (!usingmouse)
 605                 {
 606                         usingmouse = true;
 607                         IN_ActivateMouse ();
 608                 }
 609         }
 610         else
 611         {
 612                 if (usingmouse)
 613                 {
 614                         usingmouse = false;
 615                         IN_DeactivateMouse ();
 616                 }
 617         }
 618 }
 619
 620 int VID_SetGamma(unsigned short *ramps)
 621 {
 622         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 623 }
 624
 625 int VID_GetGamma(unsigned short *ramps)
 626 {
 627         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 628 }
 629
 630 void VID_Init(void)
 631 {
 632         Cvar_RegisterVariable (&vid_dga);
 633         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 634         InitSig(); // trap evil signals
 635         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 636                 mouse_avail = false;
 637 }
 638
 639 void VID_BuildGLXAttrib(int *attrib, int stencil)
 640 {
 641         *attrib++ = GLX_RGBA;
 642         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 643         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 644         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 645         *attrib++ = GLX_DOUBLEBUFFER;
 646         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 647         // if stencil is enabled, ask for alpha too
 648         if (stencil)
 649         {
 650                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 651                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 652         }
 653         *attrib++ = None;
 654 }
 655
 656 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
 657 {
 658         int i;
 659         int attrib[32];
 660         XSetWindowAttributes attr;
 661         unsigned long mask;
 662         Window root;
 663         XVisualInfo *visinfo;
 664         int MajorVersion, MinorVersion;
 665         const char *drivername;
 666
 667         drivername = "libGL.so.1";
 668         i = COM_CheckParm("-gl_driver");
 669         if (i && i < com_argc - 1)
 670                 drivername = com_argv[i + 1];
 671         if (!GL_OpenLibrary(drivername))
 672         {
 673                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 674                 return false;
 675         }
 676
 677         if (!(vidx11_display = XOpenDisplay(NULL)))
 678         {
 679                 Con_Printf("Couldn't open the X display\n");
 680                 return false;
 681         }
 682
 683         vidx11_screen = DefaultScreen(vidx11_display);
 684         root = RootWindow(vidx11_display, vidx11_screen);
 685
 686         // Get video mode list
 687         MajorVersion = MinorVersion = 0;
 688         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 689                 vidmode_ext = false;
 690         else
 691         {
 692                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 693                 vidmode_ext = true;
 694         }
 695
 696         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 697          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 698          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 699          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 700          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 701         {
 702                 Con_Printf("glX functions not found in %s\n", gl_driver);
 703                 return false;
 704         }
 705
 706         VID_BuildGLXAttrib(attrib, stencil);
 707         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 708         if (!visinfo)
 709         {
 710                 Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
 711                 return false;
 712         }
 713
 714         if (vidmode_ext)
 715         {
 716                 int best_fit, best_dist, dist, x, y;
 717
 718                 // Are we going fullscreen?  If so, let's change video mode
 719                 if (fullscreen)
 720                 {
 721                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 722                         best_dist = 9999999;
 723                         best_fit = -1;
 724
 725                         for (i = 0; i < num_vidmodes; i++)
 726                         {
 727                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 728                                         continue;
 729
 730                                 x = width - vidmodes[i]->hdisplay;
 731                                 y = height - vidmodes[i]->vdisplay;
 732                                 dist = (x * x) + (y * y);
 733                                 if (dist < best_dist)
 734                                 {
 735                                         best_dist = dist;
 736                                         best_fit = i;
 737                                 }
 738                         }
 739
 740                         if (best_fit != -1)
 741                         {
 742                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 743                                 // to width/height =, so the window will take the full area of
 744                                 // the mode chosen
 745                                 width = vidmodes[best_fit]->hdisplay;
 746                                 height = vidmodes[best_fit]->vdisplay;
 747
 748                                 // change to the mode
 749                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 750                                 vidmode_active = true;
 751
 752                                 // Move the viewport to top left
 753                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 754                         }
 755                         else
 756                                 fullscreen = 0;
 757                 }
 758         }
 759
 760         // LordHavoc: save the visual for use in gamma ramp settings later
 761         vidx11_visual = visinfo->visual;
 762
 763         /* window attributes */
 764         attr.background_pixel = 0;
 765         attr.border_pixel = 0;
 766         // LordHavoc: save the colormap for later, too
 767         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 768         attr.event_mask = X_MASK;
 769         if (vidmode_active)
 770         {
 771                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 772                 attr.override_redirect = True;
 773                 attr.backing_store = NotUseful;
 774                 attr.save_under = False;
 775         }
 776         else
 777                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 778
 779         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 780         XStoreName(vidx11_display, win, gamename);
 781         XMapWindow(vidx11_display, win);
 782
 783         // LordHavoc: making the close button on a window do the right thing
 784         // seems to involve this mess, sigh...
 785         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 786         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 787
 788         if (vidmode_active)
 789         {
 790                 XMoveWindow(vidx11_display, win, 0, 0);
 791                 XRaiseWindow(vidx11_display, win);
 792                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 793                 XFlush(vidx11_display);
 794                 // Move the viewport to top left
 795                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 796         }
 797
 798         //XSync(vidx11_display, False);
 799
 800         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 801         if (!ctx)
 802                 Sys_Error ("glXCreateContext failed\n");
 803
 804         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 805                 Sys_Error ("glXMakeCurrent failed\n");
 806
 807         XSync(vidx11_display, False);
 808
 809         scr_width = width;
 810         scr_height = height;
 811
 812         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 813                 Sys_Error("glGetString not found in %s", gl_driver);
 814
 815         gl_renderer = qglGetString(GL_RENDERER);
 816         gl_vendor = qglGetString(GL_VENDOR);
 817         gl_version = qglGetString(GL_VERSION);
 818         gl_extensions = qglGetString(GL_EXTENSIONS);
 819         gl_platform = "GLX";
 820         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 821
 822         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 823         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
 824
 825         usingmouse = false;
 826         vid_hidden = false;
 827         vid_allowhwgamma = true;
 828         GL_Init();
 829         return true;
 830 }
 831
 832 void Sys_SendKeyEvents(void)
 833 {
 834         HandleEvents();
 835 }
 836
 837 /*
 838 ===========
 839 IN_Commands
 840 ===========
 841 */
 842 void IN_Commands (void)
 843 {
 844 }
 845
 846 void IN_Move (usercmd_t *cmd)
 847 {
 848         if (mouse_avail)
 849                 IN_Mouse(cmd, mouse_x, mouse_y);
 850         mouse_x = 0;
 851         mouse_y = 0;
 852 }
 853
 854 static void *prjobj = NULL;
 855
 856 int GL_OpenLibrary(const char *name)
 857 {
 858         Con_Printf("Loading OpenGL driver %s\n", name);
 859         GL_CloseLibrary();
 860         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 861         {
 862                 Con_Printf("Unable to open symbol list for %s\n", name);
 863                 return false;
 864         }
 865         strcpy(gl_driver, name);
 866         return true;
 867 }
 868
 869 void GL_CloseLibrary(void)
 870 {
 871         if (prjobj)
 872                 dlclose(prjobj);
 873         prjobj = NULL;
 874         gl_driver[0] = 0;
 875         qglXGetProcAddressARB = NULL;
 876         gl_extensions = "";
 877         gl_platform = "";
 878         gl_platformextensions = "";
 879 }
 880
 881 void *GL_GetProcAddress(const char *name)
 882 {
 883         void *p = NULL;
 884         if (qglXGetProcAddressARB != NULL)
 885                 p = (void *) qglXGetProcAddressARB(name);
 886         if (p == NULL)
 887                 p = (void *) dlsym(prjobj, name);
 888         return p;
 889 }
 890