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 #if !defined(__APPLE__) && !defined(__MACH__) && !defined(SUNOS)
  39 #include <X11/extensions/xf86dga.h>
  40 #endif
  41 #include <X11/extensions/xf86vmode.h>
  42
  43 #include "quakedef.h"
  44
  45 // Tell startup code that we have a client
  46 int cl_available = true;
  47
  48 // note: if we used the XRandR extension we could support refresh rates
  49 qboolean vid_supportrefreshrate = false;
  50
  51 //GLX prototypes
  52 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  53 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  54 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  55 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  56 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  57 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  58
  59 //GLX_ARB_get_proc_address
  60 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  61
  62 static dllfunction_t getprocaddressfuncs[] =
  63 {
  64         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  65         {NULL, NULL}
  66 };
  67
  68 //GLX_SGI_swap_control
  69 GLint (GLAPIENTRY *qglXSwapIntervalSGI)(GLint interval);
  70
  71 static dllfunction_t swapcontrolfuncs[] =
  72 {
  73         {"glXSwapIntervalSGI", (void **) &qglXSwapIntervalSGI},
  74         {NULL, NULL}
  75 };
  76
  77 static Display *vidx11_display = NULL;
  78 static int vidx11_screen;
  79 static Window win;
  80 static GLXContext ctx = NULL;
  81
  82 Atom wm_delete_window_atom;
  83
  84 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  85 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  86                     PointerMotionMask | ButtonMotionMask)
  87 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  88                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  89                 LeaveWindowMask)
  90
  91
  92 static qboolean mouse_avail = true;
  93 static qboolean vid_usingmouse = false;
  94 static qboolean vid_usingvsync = false;
  95 static qboolean vid_usevsync = false;
  96 static qboolean vid_x11_hardwaregammasupported = false;
  97 static int vid_x11_gammarampsize = 0;
  98 static float    mouse_x, mouse_y;
  99 static int p_mouse_x, p_mouse_y;
 100
 101 #if !defined(__APPLE__) && !defined(SUNOS)
 102 // FIXME: vid_dga_mouseaccel is poorly named, it is actually the multiplier for mouse movement, not an acceleration (which would be a power function or something)
 103 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1", "make use of DGA mouse input"};
 104 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1", "speed of mouse when using DGA mouse input"};
 105 #endif
 106
 107 qboolean vidmode_ext = false;
 108
 109 static int win_x, win_y;
 110
 111 static XF86VidModeModeInfo init_vidmode;
 112 static qboolean vid_isfullscreen = false;
 113
 114 static Visual *vidx11_visual;
 115 static Colormap vidx11_colormap;
 116
 117 /*-----------------------------------------------------------------------*/
 118
 119 static int XLateKey(XKeyEvent *ev, char *ascii)
 120 {
 121         int key = 0;
 122         char buf[64];
 123         KeySym keysym, shifted;
 124
 125         keysym = XLookupKeysym (ev, 0);
 126         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 127         *ascii = buf[0];
 128
 129         switch(keysym)
 130         {
 131                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 132                 case XK_Page_Up:         key = K_PGUP; break;
 133
 134                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 135                 case XK_Page_Down:       key = K_PGDN; break;
 136
 137                 case XK_KP_Home: key = K_KP_HOME; break;
 138                 case XK_Home:    key = K_HOME; break;
 139
 140                 case XK_KP_End:  key = K_KP_END; break;
 141                 case XK_End:     key = K_END; break;
 142
 143                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 144                 case XK_Left:    key = K_LEFTARROW; break;
 145
 146                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 147                 case XK_Right:  key = K_RIGHTARROW;             break;
 148
 149                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 150                 case XK_Down:    key = K_DOWNARROW; break;
 151
 152                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 153                 case XK_Up:              key = K_UPARROW;        break;
 154
 155                 case XK_Escape: key = K_ESCAPE;         break;
 156
 157                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 158                 case XK_Return: key = K_ENTER;           break;
 159
 160                 case XK_Tab:            key = K_TAB;                     break;
 161
 162                 case XK_F1:              key = K_F1;                            break;
 163
 164                 case XK_F2:              key = K_F2;                            break;
 165
 166                 case XK_F3:              key = K_F3;                            break;
 167
 168                 case XK_F4:              key = K_F4;                            break;
 169
 170                 case XK_F5:              key = K_F5;                            break;
 171
 172                 case XK_F6:              key = K_F6;                            break;
 173
 174                 case XK_F7:              key = K_F7;                            break;
 175
 176                 case XK_F8:              key = K_F8;                            break;
 177
 178                 case XK_F9:              key = K_F9;                            break;
 179
 180                 case XK_F10:            key = K_F10;                     break;
 181
 182                 case XK_F11:            key = K_F11;                     break;
 183
 184                 case XK_F12:            key = K_F12;                     break;
 185
 186                 case XK_BackSpace: key = K_BACKSPACE; break;
 187
 188                 case XK_KP_Delete: key = K_KP_DEL; break;
 189                 case XK_Delete: key = K_DEL; break;
 190
 191                 case XK_Pause:  key = K_PAUSE;           break;
 192
 193                 case XK_Shift_L:
 194                 case XK_Shift_R:        key = K_SHIFT;          break;
 195
 196                 case XK_Execute:
 197                 case XK_Control_L:
 198                 case XK_Control_R:      key = K_CTRL;            break;
 199
 200                 case XK_Alt_L:
 201                 case XK_Meta_L:
 202                 case XK_ISO_Level3_Shift:
 203                 case XK_Alt_R:
 204                 case XK_Meta_R: key = K_ALT;                    break;
 205
 206                 case XK_KP_Begin: key = K_KP_5; break;
 207
 208                 case XK_Insert:key = K_INS; break;
 209                 case XK_KP_Insert: key = K_KP_INS; break;
 210
 211                 case XK_KP_Multiply: key = '*'; break;
 212                 case XK_KP_Add:  key = K_KP_PLUS; break;
 213                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 214                 case XK_KP_Divide: key = K_KP_SLASH; break;
 215
 216                 case XK_section:        key = '~'; break;
 217
 218                 default:
 219                         if (keysym < 32)
 220                                 break;
 221
 222                         if (keysym >= 'A' && keysym <= 'Z')
 223                                 key = keysym - 'A' + 'a';
 224                         else
 225                                 key = keysym;
 226
 227                         break;
 228         }
 229
 230         return key;
 231 }
 232
 233 static Cursor CreateNullCursor(Display *display, Window root)
 234 {
 235         Pixmap cursormask;
 236         XGCValues xgc;
 237         GC gc;
 238         XColor dummycolour;
 239         Cursor cursor;
 240
 241         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 242         xgc.function = GXclear;
 243         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 244         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 245         dummycolour.pixel = 0;
 246         dummycolour.red = 0;
 247         dummycolour.flags = 04;
 248         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 249         XFreePixmap(display,cursormask);
 250         XFreeGC(display,gc);
 251         return cursor;
 252 }
 253
 254 static void IN_Activate (qboolean grab)
 255 {
 256         if (!vidx11_display)
 257                 return;
 258         if (grab)
 259         {
 260                 if (!vid_usingmouse && mouse_avail && win)
 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 !defined(__APPLE__) && !defined(SUNOS)
 275                         if (vid_dga.integer)
 276                         {
 277                                 int MajorVersion, MinorVersion;
 278
 279                                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 280                                 {
 281                                         // unable to query, probably not supported
 282                                         Con_Print( "Failed to detect XF86DGA Mouse\n" );
 283                                         Cvar_SetValueQuick(&vid_dga, 0);
 284                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 285                                 }
 286                                 else
 287                                 {
 288                                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 289                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 290                                 }
 291                         }
 292                         else
 293 #endif
 294                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 295
 296                         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 297
 298                         mouse_x = mouse_y = 0;
 299                         cl_ignoremousemove = true;
 300                         vid_usingmouse = true;
 301                 }
 302         }
 303         else
 304         {
 305                 if (vid_usingmouse)
 306                 {
 307 #if !defined(__APPLE__) && !defined(SUNOS)
 308                         if (vid_dga.integer)
 309                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 310 #endif
 311
 312                         XUngrabPointer(vidx11_display, CurrentTime);
 313                         XUngrabKeyboard(vidx11_display, CurrentTime);
 314
 315                         // inviso cursor
 316                         if (win)
 317                                 XUndefineCursor(vidx11_display, win);
 318
 319                         cl_ignoremousemove = true;
 320                         vid_usingmouse = false;
 321                 }
 322         }
 323 }
 324
 325 static keynum_t buttonremap[18] =
 326 {
 327         K_MOUSE1,
 328         K_MOUSE3,
 329         K_MOUSE2,
 330         K_MWHEELUP,
 331         K_MWHEELDOWN,
 332         K_MOUSE4,
 333         K_MOUSE5,
 334         K_MOUSE6,
 335         K_MOUSE7,
 336         K_MOUSE8,
 337         K_MOUSE9,
 338         K_MOUSE10,
 339         K_MOUSE11,
 340         K_MOUSE12,
 341         K_MOUSE13,
 342         K_MOUSE14,
 343         K_MOUSE15,
 344         K_MOUSE16,
 345 };
 346
 347 static void HandleEvents(void)
 348 {
 349         XEvent event;
 350         int key;
 351         char ascii;
 352         qboolean dowarp = false;
 353
 354         if (!vidx11_display)
 355                 return;
 356
 357         while (XPending(vidx11_display))
 358         {
 359                 XNextEvent(vidx11_display, &event);
 360
 361                 switch (event.type)
 362                 {
 363                 case KeyPress:
 364                         // key pressed
 365                         key = XLateKey (&event.xkey, &ascii);
 366                         Key_Event(key, ascii, true);
 367                         break;
 368
 369                 case KeyRelease:
 370                         // key released
 371                         key = XLateKey (&event.xkey, &ascii);
 372                         Key_Event(key, ascii, false);
 373                         break;
 374
 375                 case MotionNotify:
 376                         // mouse moved
 377                         if (vid_usingmouse)
 378                         {
 379 #if !defined(__APPLE__) && !defined(SUNOS)
 380                                 if (vid_dga.integer == 1)
 381                                 {
 382                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 383                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 384                                 }
 385                                 else
 386 #endif
 387                                 {
 388
 389                                         if (!event.xmotion.send_event)
 390                                         {
 391                                                 mouse_x += event.xmotion.x - p_mouse_x;
 392                                                 mouse_y += event.xmotion.y - p_mouse_y;
 393                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 394                                                         dowarp = true;
 395                                         }
 396                                         p_mouse_x = event.xmotion.x;
 397                                         p_mouse_y = event.xmotion.y;
 398                                 }
 399                         }
 400                         //else
 401                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 402                         break;
 403
 404                 case ButtonPress:
 405                         // mouse button pressed
 406                         if (event.xbutton.button <= 18)
 407                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 408                         else
 409                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 410                         break;
 411
 412                 case ButtonRelease:
 413                         // mouse button released
 414                         if (event.xbutton.button <= 18)
 415                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 416                         else
 417                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 418                         break;
 419
 420                 case CreateNotify:
 421                         // window created
 422                         win_x = event.xcreatewindow.x;
 423                         win_y = event.xcreatewindow.y;
 424                         break;
 425
 426                 case ConfigureNotify:
 427                         // window changed size/location
 428                         win_x = event.xconfigure.x;
 429                         win_y = event.xconfigure.y;
 430                         break;
 431                 case DestroyNotify:
 432                         // window has been destroyed
 433                         Sys_Quit();
 434                         break;
 435                 case ClientMessage:
 436                         // window manager messages
 437                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 438                                 Sys_Quit();
 439                         break;
 440                 case MapNotify:
 441                         // window restored
 442                         vid_hidden = false;
 443                         vid_activewindow = false;
 444                         VID_RestoreSystemGamma();
 445                         break;
 446                 case UnmapNotify:
 447                         // window iconified/rolledup/whatever
 448                         vid_hidden = true;
 449                         vid_activewindow = false;
 450                         VID_RestoreSystemGamma();
 451                         break;
 452                 case FocusIn:
 453                         // window is now the input focus
 454                         vid_activewindow = true;
 455                         break;
 456                 case FocusOut:
 457                         // window is no longer the input focus
 458                         vid_activewindow = false;
 459                         VID_RestoreSystemGamma();
 460                         break;
 461                 case EnterNotify:
 462                         // mouse entered window
 463                         break;
 464                 case LeaveNotify:
 465                         // mouse left window
 466                         break;
 467                 }
 468         }
 469
 470         if (dowarp)
 471         {
 472                 /* move the mouse to the window center again */
 473                 p_mouse_x = vid.width / 2;
 474                 p_mouse_y = vid.height / 2;
 475                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 476         }
 477 }
 478
 479 static void *prjobj = NULL;
 480
 481 static void GL_CloseLibrary(void)
 482 {
 483         if (prjobj)
 484                 dlclose(prjobj);
 485         prjobj = NULL;
 486         gl_driver[0] = 0;
 487         qglXGetProcAddressARB = NULL;
 488         gl_extensions = "";
 489         gl_platform = "";
 490         gl_platformextensions = "";
 491 }
 492
 493 static int GL_OpenLibrary(const char *name)
 494 {
 495         Con_Printf("Loading OpenGL driver %s\n", name);
 496         GL_CloseLibrary();
 497         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 498         {
 499                 Con_Printf("Unable to open symbol list for %s\n", name);
 500                 return false;
 501         }
 502         strcpy(gl_driver, name);
 503         return true;
 504 }
 505
 506 void *GL_GetProcAddress(const char *name)
 507 {
 508         void *p = NULL;
 509         if (qglXGetProcAddressARB != NULL)
 510                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 511         if (p == NULL)
 512                 p = (void *) dlsym(prjobj, name);
 513         return p;
 514 }
 515
 516 void VID_Shutdown(void)
 517 {
 518         if (!ctx || !vidx11_display)
 519                 return;
 520
 521         if (vidx11_display)
 522         {
 523                 IN_Activate(false);
 524                 VID_RestoreSystemGamma();
 525
 526                 // FIXME: glXDestroyContext here?
 527                 if (vid_isfullscreen)
 528                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, &init_vidmode);
 529                 if (win)
 530                         XDestroyWindow(vidx11_display, win);
 531                 XCloseDisplay(vidx11_display);
 532         }
 533         vid_hidden = true;
 534         vid_isfullscreen = false;
 535         vidx11_display = NULL;
 536         win = 0;
 537         ctx = NULL;
 538
 539         GL_CloseLibrary();
 540         Key_ClearStates ();
 541 }
 542
 543 void signal_handler(int sig)
 544 {
 545         Con_Printf("Received signal %d, exiting...\n", sig);
 546         VID_RestoreSystemGamma();
 547         Sys_Quit();
 548         exit(0);
 549 }
 550
 551 void InitSig(void)
 552 {
 553         signal(SIGHUP, signal_handler);
 554         signal(SIGINT, signal_handler);
 555         signal(SIGQUIT, signal_handler);
 556         signal(SIGILL, signal_handler);
 557         signal(SIGTRAP, signal_handler);
 558         signal(SIGIOT, signal_handler);
 559         signal(SIGBUS, signal_handler);
 560         signal(SIGFPE, signal_handler);
 561         signal(SIGSEGV, signal_handler);
 562         signal(SIGTERM, signal_handler);
 563 }
 564
 565 void VID_Finish (qboolean allowmousegrab)
 566 {
 567         qboolean vid_usemouse;
 568
 569         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 570         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 571         {
 572                 vid_usingvsync = vid_usevsync;
 573                 if (qglXSwapIntervalSGI (vid_usevsync))
 574                         Con_Print("glXSwapIntervalSGI didn't accept the vid_vsync change, it will take effect on next vid_restart (GLX_SGI_swap_control does not allow turning off vsync)\n");
 575         }
 576
 577 // handle the mouse state when windowed if that's changed
 578         vid_usemouse = false;
 579         if (allowmousegrab && vid_mouse.integer && !key_consoleactive && (key_dest != key_game || !cls.demoplayback))
 580                 vid_usemouse = true;
 581         if (!vid_activewindow)
 582                 vid_usemouse = false;
 583         if (vid_isfullscreen)
 584                 vid_usemouse = true;
 585         IN_Activate(vid_usemouse);
 586
 587         if (r_render.integer)
 588         {
 589                 CHECKGLERROR
 590                 if (r_speeds.integer || gl_finish.integer)
 591                 {
 592                         qglFinish();CHECKGLERROR
 593                 }
 594                 qglXSwapBuffers(vidx11_display, win);CHECKGLERROR
 595         }
 596
 597         if (vid_x11_hardwaregammasupported)
 598                 VID_UpdateGamma(false, vid_x11_gammarampsize);
 599 }
 600
 601 int VID_SetGamma(unsigned short *ramps, int rampsize)
 602 {
 603         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 604 }
 605
 606 int VID_GetGamma(unsigned short *ramps, int rampsize)
 607 {
 608         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 609 }
 610
 611 void VID_Init(void)
 612 {
 613 #if !defined(__APPLE__) && !defined(SUNOS)
 614         Cvar_RegisterVariable (&vid_dga);
 615         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 616 #endif
 617         InitSig(); // trap evil signals
 618 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 619         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 620                 mouse_avail = false;
 621 }
 622
 623 void VID_BuildGLXAttrib(int *attrib, int stencil)
 624 {
 625         *attrib++ = GLX_RGBA;
 626         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 627         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 628         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 629         *attrib++ = GLX_DOUBLEBUFFER;
 630         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 631         // if stencil is enabled, ask for alpha too
 632         if (stencil)
 633         {
 634                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 635                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 636         }
 637         *attrib++ = None;
 638 }
 639
 640 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate)
 641 {
 642         int i;
 643         int attrib[32];
 644         XSetWindowAttributes attr;
 645         unsigned long mask;
 646         Window root;
 647         XVisualInfo *visinfo;
 648         int MajorVersion, MinorVersion;
 649         const char *drivername;
 650
 651 #if defined(__APPLE__) && defined(__MACH__)
 652         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 653 #else
 654         drivername = "libGL.so.1";
 655 #endif
 656 // COMMANDLINEOPTION: Linux GLX: -gl_driver <drivername> selects a GL driver library, default is libGL.so.1, useful only for using fxmesa or similar, if you don't know what this is for, you don't need it
 657 // COMMANDLINEOPTION: BSD GLX: -gl_driver <drivername> selects a GL driver library, default is libGL.so.1, useful only for using fxmesa or similar, if you don't know what this is for, you don't need it
 658 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 659         i = COM_CheckParm("-gl_driver");
 660         if (i && i < com_argc - 1)
 661                 drivername = com_argv[i + 1];
 662         if (!GL_OpenLibrary(drivername))
 663         {
 664                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 665                 return false;
 666         }
 667
 668         if (!(vidx11_display = XOpenDisplay(NULL)))
 669         {
 670                 Con_Print("Couldn't open the X display\n");
 671                 return false;
 672         }
 673
 674         vidx11_screen = DefaultScreen(vidx11_display);
 675         root = RootWindow(vidx11_display, vidx11_screen);
 676
 677         // Get video mode list
 678         MajorVersion = MinorVersion = 0;
 679         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 680                 vidmode_ext = false;
 681         else
 682         {
 683                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 684                 vidmode_ext = true;
 685         }
 686
 687         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 688          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 689          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 690          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 691          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 692          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 693         {
 694                 Con_Printf("glX functions not found in %s\n", gl_driver);
 695                 return false;
 696         }
 697
 698         VID_BuildGLXAttrib(attrib, bpp == 32);
 699         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 700         if (!visinfo)
 701         {
 702                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 703                 return false;
 704         }
 705
 706         if (vidmode_ext)
 707         {
 708                 int best_fit, best_dist, dist, x, y;
 709
 710                 // Are we going fullscreen?  If so, let's change video mode
 711                 if (fullscreen)
 712                 {
 713                         XF86VidModeModeLine *current_vidmode;
 714                         XF86VidModeModeInfo **vidmodes;
 715                         int num_vidmodes;
 716
 717                         // This nice hack comes from the SDL source code
 718                         current_vidmode = (XF86VidModeModeLine*)((char*)&init_vidmode + sizeof(init_vidmode.dotclock));
 719                         XF86VidModeGetModeLine(vidx11_display, vidx11_screen, (int*)&init_vidmode.dotclock, current_vidmode);
 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                                 vid_isfullscreen = 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                         free(vidmodes);
 759                 }
 760         }
 761
 762         // LordHavoc: save the visual for use in gamma ramp settings later
 763         vidx11_visual = visinfo->visual;
 764
 765         /* window attributes */
 766         attr.background_pixel = 0;
 767         attr.border_pixel = 0;
 768         // LordHavoc: save the colormap for later, too
 769         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 770         attr.event_mask = X_MASK;
 771         if (vid_isfullscreen)
 772         {
 773                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 774                 attr.override_redirect = True;
 775                 attr.backing_store = NotUseful;
 776                 attr.save_under = False;
 777         }
 778         else
 779                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 780
 781         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 782         XStoreName(vidx11_display, win, gamename);
 783         XMapWindow(vidx11_display, win);
 784
 785         // LordHavoc: making the close button on a window do the right thing
 786         // seems to involve this mess, sigh...
 787         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 788         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 789
 790         if (vid_isfullscreen)
 791         {
 792                 XMoveWindow(vidx11_display, win, 0, 0);
 793                 XRaiseWindow(vidx11_display, win);
 794                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 795                 XFlush(vidx11_display);
 796                 // Move the viewport to top left
 797                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 798         }
 799
 800         //XSync(vidx11_display, False);
 801
 802         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 803         if (!ctx)
 804         {
 805                 Con_Printf ("glXCreateContext failed\n");
 806                 return false;
 807         }
 808
 809         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 810         {
 811                 Con_Printf ("glXMakeCurrent failed\n");
 812                 return false;
 813         }
 814
 815         XSync(vidx11_display, False);
 816
 817         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 818         {
 819                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 820                 return false;
 821         }
 822
 823         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 824         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 825         gl_version = (const char *)qglGetString(GL_VERSION);
 826         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 827         gl_platform = "GLX";
 828         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 829
 830         gl_videosyncavailable = false;
 831
 832 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 833 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 834 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 835         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 836 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 837 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 838 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 839         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 840
 841         vid_usingmouse = false;
 842         vid_usingvsync = false;
 843         vid_hidden = false;
 844         vid_activewindow = true;
 845         vid_x11_hardwaregammasupported = XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &vid_x11_gammarampsize) != 0;
 846         GL_Init();
 847         return true;
 848 }
 849
 850 void Sys_SendKeyEvents(void)
 851 {
 852         HandleEvents();
 853 }
 854
 855 void IN_Move (void)
 856 {
 857         if (mouse_avail)
 858         {
 859                 in_mouse_x = mouse_x;
 860                 in_mouse_y = mouse_y;
 861         }
 862         mouse_x = 0;
 863         mouse_y = 0;
 864 }