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 float    mouse_x, mouse_y;
  97 static int p_mouse_x, p_mouse_y;
  98
  99 #if !defined(__APPLE__) && !defined(SUNOS)
 100 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
 101 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
 102 #endif
 103
 104 qboolean vidmode_ext = false;
 105
 106 static int win_x, win_y;
 107
 108 static XF86VidModeModeInfo **vidmodes;
 109 static int num_vidmodes;
 110 static qboolean vid_isfullscreen = false;
 111
 112 static Visual *vidx11_visual;
 113 static Colormap vidx11_colormap;
 114
 115 /*-----------------------------------------------------------------------*/
 116
 117 static int XLateKey(XKeyEvent *ev, char *ascii)
 118 {
 119         int key = 0;
 120         char buf[64];
 121         KeySym keysym, shifted;
 122
 123         keysym = XLookupKeysym (ev, 0);
 124         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 125         *ascii = buf[0];
 126
 127         switch(keysym)
 128         {
 129                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 130                 case XK_Page_Up:         key = K_PGUP; break;
 131
 132                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 133                 case XK_Page_Down:       key = K_PGDN; break;
 134
 135                 case XK_KP_Home: key = K_KP_HOME; break;
 136                 case XK_Home:    key = K_HOME; break;
 137
 138                 case XK_KP_End:  key = K_KP_END; break;
 139                 case XK_End:     key = K_END; break;
 140
 141                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 142                 case XK_Left:    key = K_LEFTARROW; break;
 143
 144                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 145                 case XK_Right:  key = K_RIGHTARROW;             break;
 146
 147                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 148                 case XK_Down:    key = K_DOWNARROW; break;
 149
 150                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 151                 case XK_Up:              key = K_UPARROW;        break;
 152
 153                 case XK_Escape: key = K_ESCAPE;         break;
 154
 155                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 156                 case XK_Return: key = K_ENTER;           break;
 157
 158                 case XK_Tab:            key = K_TAB;                     break;
 159
 160                 case XK_F1:              key = K_F1;                            break;
 161
 162                 case XK_F2:              key = K_F2;                            break;
 163
 164                 case XK_F3:              key = K_F3;                            break;
 165
 166                 case XK_F4:              key = K_F4;                            break;
 167
 168                 case XK_F5:              key = K_F5;                            break;
 169
 170                 case XK_F6:              key = K_F6;                            break;
 171
 172                 case XK_F7:              key = K_F7;                            break;
 173
 174                 case XK_F8:              key = K_F8;                            break;
 175
 176                 case XK_F9:              key = K_F9;                            break;
 177
 178                 case XK_F10:            key = K_F10;                     break;
 179
 180                 case XK_F11:            key = K_F11;                     break;
 181
 182                 case XK_F12:            key = K_F12;                     break;
 183
 184                 case XK_BackSpace: key = K_BACKSPACE; break;
 185
 186                 case XK_KP_Delete: key = K_KP_DEL; break;
 187                 case XK_Delete: key = K_DEL; break;
 188
 189                 case XK_Pause:  key = K_PAUSE;           break;
 190
 191                 case XK_Shift_L:
 192                 case XK_Shift_R:        key = K_SHIFT;          break;
 193
 194                 case XK_Execute:
 195                 case XK_Control_L:
 196                 case XK_Control_R:      key = K_CTRL;            break;
 197
 198                 case XK_Alt_L:
 199                 case XK_Meta_L:
 200                 case XK_Alt_R:
 201                 case XK_Meta_R: key = K_ALT;                    break;
 202
 203                 case XK_KP_Begin: key = K_KP_5; break;
 204
 205                 case XK_Insert:key = K_INS; break;
 206                 case XK_KP_Insert: key = K_KP_INS; break;
 207
 208                 case XK_KP_Multiply: key = '*'; break;
 209                 case XK_KP_Add:  key = K_KP_PLUS; break;
 210                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 211                 case XK_KP_Divide: key = K_KP_SLASH; break;
 212
 213                 case XK_section:        key = '~'; break;
 214
 215                 default:
 216                         if (keysym < 32)
 217                                 break;
 218
 219                         if (keysym >= 'A' && keysym <= 'Z')
 220                                 key = keysym - 'A' + 'a';
 221                         else
 222                                 key = keysym;
 223
 224                         break;
 225         }
 226
 227         return key;
 228 }
 229
 230 static Cursor CreateNullCursor(Display *display, Window root)
 231 {
 232         Pixmap cursormask;
 233         XGCValues xgc;
 234         GC gc;
 235         XColor dummycolour;
 236         Cursor cursor;
 237
 238         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 239         xgc.function = GXclear;
 240         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 241         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 242         dummycolour.pixel = 0;
 243         dummycolour.red = 0;
 244         dummycolour.flags = 04;
 245         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 246         XFreePixmap(display,cursormask);
 247         XFreeGC(display,gc);
 248         return cursor;
 249 }
 250
 251 static void IN_Activate (qboolean grab)
 252 {
 253         if (!vidx11_display)
 254                 return;
 255         if (grab)
 256         {
 257                 if (!vid_usingmouse && mouse_avail && win)
 258                 {
 259                         XWindowAttributes attribs_1;
 260                         XSetWindowAttributes attribs_2;
 261
 262                         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 263                         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 264                         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 265
 266                 // inviso cursor
 267                         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 268
 269                         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 270
 271 #if !defined(__APPLE__) && !defined(SUNOS)
 272                         if (vid_dga.integer)
 273                         {
 274                                 int MajorVersion, MinorVersion;
 275
 276                                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 277                                 {
 278                                         // unable to query, probably not supported
 279                                         Con_Print( "Failed to detect XF86DGA Mouse\n" );
 280                                         Cvar_SetValueQuick(&vid_dga, 0);
 281                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 282                                 }
 283                                 else
 284                                 {
 285                                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 286                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 287                                 }
 288                         }
 289                         else
 290 #endif
 291                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 292
 293                         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 294
 295                         mouse_x = mouse_y = 0;
 296                         cl_ignoremousemove = true;
 297                         vid_usingmouse = true;
 298                 }
 299         }
 300         else
 301         {
 302                 if (vid_usingmouse)
 303                 {
 304 #if !defined(__APPLE__) && !defined(SUNOS)
 305                         if (vid_dga.integer)
 306                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 307 #endif
 308
 309                         XUngrabPointer(vidx11_display, CurrentTime);
 310                         XUngrabKeyboard(vidx11_display, CurrentTime);
 311
 312                         // inviso cursor
 313                         if (win)
 314                                 XUndefineCursor(vidx11_display, win);
 315
 316                         cl_ignoremousemove = true;
 317                         vid_usingmouse = false;
 318                 }
 319         }
 320 }
 321
 322 static keynum_t buttonremap[18] =
 323 {
 324         K_MOUSE1,
 325         K_MOUSE3,
 326         K_MOUSE2,
 327         K_MWHEELUP,
 328         K_MWHEELDOWN,
 329         K_MOUSE4,
 330         K_MOUSE5,
 331         K_MOUSE6,
 332         K_MOUSE7,
 333         K_MOUSE8,
 334         K_MOUSE9,
 335         K_MOUSE10,
 336         K_MOUSE11,
 337         K_MOUSE12,
 338         K_MOUSE13,
 339         K_MOUSE14,
 340         K_MOUSE15,
 341         K_MOUSE16,
 342 };
 343
 344 static void HandleEvents(void)
 345 {
 346         XEvent event;
 347         int key;
 348         char ascii;
 349         qboolean dowarp = false;
 350
 351         if (!vidx11_display)
 352                 return;
 353
 354         while (XPending(vidx11_display))
 355         {
 356                 XNextEvent(vidx11_display, &event);
 357
 358                 switch (event.type)
 359                 {
 360                 case KeyPress:
 361                         // key pressed
 362                         key = XLateKey (&event.xkey, &ascii);
 363                         Key_Event(key, ascii, true);
 364                         break;
 365
 366                 case KeyRelease:
 367                         // key released
 368                         key = XLateKey (&event.xkey, &ascii);
 369                         Key_Event(key, ascii, false);
 370                         break;
 371
 372                 case MotionNotify:
 373                         // mouse moved
 374                         if (vid_usingmouse)
 375                         {
 376 #if !defined(__APPLE__) && !defined(SUNOS)
 377                                 if (vid_dga.integer == 1)
 378                                 {
 379                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 380                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 381                                 }
 382                                 else
 383 #endif
 384                                 {
 385
 386                                         if (!event.xmotion.send_event)
 387                                         {
 388                                                 mouse_x += event.xmotion.x - p_mouse_x;
 389                                                 mouse_y += event.xmotion.y - p_mouse_y;
 390                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 391                                                         dowarp = true;
 392                                         }
 393                                         p_mouse_x = event.xmotion.x;
 394                                         p_mouse_y = event.xmotion.y;
 395                                 }
 396                         }
 397                         //else
 398                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 399                         break;
 400
 401                 case ButtonPress:
 402                         // mouse button pressed
 403                         if (event.xbutton.button <= 18)
 404                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 405                         else
 406                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 407                         break;
 408
 409                 case ButtonRelease:
 410                         // mouse button released
 411                         if (event.xbutton.button <= 18)
 412                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 413                         else
 414                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 415                         break;
 416
 417                 case CreateNotify:
 418                         // window created
 419                         win_x = event.xcreatewindow.x;
 420                         win_y = event.xcreatewindow.y;
 421                         break;
 422
 423                 case ConfigureNotify:
 424                         // window changed size/location
 425                         win_x = event.xconfigure.x;
 426                         win_y = event.xconfigure.y;
 427                         break;
 428                 case DestroyNotify:
 429                         // window has been destroyed
 430                         Sys_Quit();
 431                         break;
 432                 case ClientMessage:
 433                         // window manager messages
 434                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 435                                 Sys_Quit();
 436                         break;
 437                 case MapNotify:
 438                         // window restored
 439                         vid_hidden = false;
 440                         vid_activewindow = false;
 441                         VID_RestoreSystemGamma();
 442                         break;
 443                 case UnmapNotify:
 444                         // window iconified/rolledup/whatever
 445                         vid_hidden = true;
 446                         vid_activewindow = false;
 447                         VID_RestoreSystemGamma();
 448                         break;
 449                 case FocusIn:
 450                         // window is now the input focus
 451                         vid_activewindow = true;
 452                         break;
 453                 case FocusOut:
 454                         // window is no longer the input focus
 455                         vid_activewindow = false;
 456                         VID_RestoreSystemGamma();
 457                         break;
 458                 case EnterNotify:
 459                         // mouse entered window
 460                         break;
 461                 case LeaveNotify:
 462                         // mouse left window
 463                         break;
 464                 }
 465         }
 466
 467         if (dowarp)
 468         {
 469                 /* move the mouse to the window center again */
 470                 p_mouse_x = vid.width / 2;
 471                 p_mouse_y = vid.height / 2;
 472                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 473         }
 474 }
 475
 476 static void *prjobj = NULL;
 477
 478 static void GL_CloseLibrary(void)
 479 {
 480         if (prjobj)
 481                 dlclose(prjobj);
 482         prjobj = NULL;
 483         gl_driver[0] = 0;
 484         qglXGetProcAddressARB = NULL;
 485         gl_extensions = "";
 486         gl_platform = "";
 487         gl_platformextensions = "";
 488 }
 489
 490 static int GL_OpenLibrary(const char *name)
 491 {
 492         Con_Printf("Loading OpenGL driver %s\n", name);
 493         GL_CloseLibrary();
 494         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 495         {
 496                 Con_Printf("Unable to open symbol list for %s\n", name);
 497                 return false;
 498         }
 499         strcpy(gl_driver, name);
 500         return true;
 501 }
 502
 503 void *GL_GetProcAddress(const char *name)
 504 {
 505         void *p = NULL;
 506         if (qglXGetProcAddressARB != NULL)
 507                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 508         if (p == NULL)
 509                 p = (void *) dlsym(prjobj, name);
 510         return p;
 511 }
 512
 513 void VID_Shutdown(void)
 514 {
 515         if (!ctx || !vidx11_display)
 516                 return;
 517
 518         if (vidx11_display)
 519         {
 520                 IN_Activate(false);
 521                 VID_RestoreSystemGamma();
 522
 523                 // FIXME: glXDestroyContext here?
 524                 if (vid_isfullscreen)
 525                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 526                 if (win)
 527                         XDestroyWindow(vidx11_display, win);
 528                 XCloseDisplay(vidx11_display);
 529         }
 530         vid_hidden = true;
 531         vid_isfullscreen = false;
 532         vidx11_display = NULL;
 533         win = 0;
 534         ctx = NULL;
 535
 536         GL_CloseLibrary();
 537         Key_ClearStates ();
 538 }
 539
 540 void signal_handler(int sig)
 541 {
 542         Con_Printf("Received signal %d, exiting...\n", sig);
 543         VID_RestoreSystemGamma();
 544         Sys_Quit();
 545         exit(0);
 546 }
 547
 548 void InitSig(void)
 549 {
 550         signal(SIGHUP, signal_handler);
 551         signal(SIGINT, signal_handler);
 552         signal(SIGQUIT, signal_handler);
 553         signal(SIGILL, signal_handler);
 554         signal(SIGTRAP, signal_handler);
 555         signal(SIGIOT, signal_handler);
 556         signal(SIGBUS, signal_handler);
 557         signal(SIGFPE, signal_handler);
 558         signal(SIGSEGV, signal_handler);
 559         signal(SIGTERM, signal_handler);
 560 }
 561
 562 void VID_Finish (void)
 563 {
 564         qboolean vid_usemouse;
 565
 566         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 567         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 568         {
 569                 vid_usingvsync = vid_usevsync;
 570                 if (qglXSwapIntervalSGI (vid_usevsync))
 571                         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");
 572         }
 573
 574 // handle the mouse state when windowed if that's changed
 575         vid_usemouse = false;
 576         if (vid_mouse.integer && !key_consoleactive && !cls.demoplayback)
 577                 vid_usemouse = true;
 578         if (!vid_activewindow)
 579                 vid_usemouse = false;
 580         if (vid_isfullscreen)
 581                 vid_usemouse = true;
 582         IN_Activate(vid_usemouse);
 583
 584         if (r_render.integer)
 585         {
 586                 if (r_speeds.integer || gl_finish.integer)
 587                         qglFinish();
 588                 qglXSwapBuffers(vidx11_display, win);
 589         }
 590 }
 591
 592 int VID_SetGamma(unsigned short *ramps)
 593 {
 594         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 595 }
 596
 597 int VID_GetGamma(unsigned short *ramps)
 598 {
 599         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 600 }
 601
 602 void VID_Init(void)
 603 {
 604 #if !defined(__APPLE__) && !defined(SUNOS)
 605         Cvar_RegisterVariable (&vid_dga);
 606         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 607 #endif
 608         InitSig(); // trap evil signals
 609 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 610         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 611                 mouse_avail = false;
 612 }
 613
 614 void VID_BuildGLXAttrib(int *attrib, int stencil)
 615 {
 616         *attrib++ = GLX_RGBA;
 617         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 618         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 619         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 620         *attrib++ = GLX_DOUBLEBUFFER;
 621         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 622         // if stencil is enabled, ask for alpha too
 623         if (stencil)
 624         {
 625                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 626                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 627         }
 628         *attrib++ = None;
 629 }
 630
 631 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate)
 632 {
 633         int i;
 634         int attrib[32];
 635         XSetWindowAttributes attr;
 636         unsigned long mask;
 637         Window root;
 638         XVisualInfo *visinfo;
 639         int MajorVersion, MinorVersion;
 640         const char *drivername;
 641
 642 #if defined(__APPLE__) && defined(__MACH__)
 643         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 644 #else
 645         drivername = "libGL.so.1";
 646 #endif
 647 // 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
 648 // 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
 649 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 650         i = COM_CheckParm("-gl_driver");
 651         if (i && i < com_argc - 1)
 652                 drivername = com_argv[i + 1];
 653         if (!GL_OpenLibrary(drivername))
 654         {
 655                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 656                 return false;
 657         }
 658
 659         if (!(vidx11_display = XOpenDisplay(NULL)))
 660         {
 661                 Con_Print("Couldn't open the X display\n");
 662                 return false;
 663         }
 664
 665         vidx11_screen = DefaultScreen(vidx11_display);
 666         root = RootWindow(vidx11_display, vidx11_screen);
 667
 668         // Get video mode list
 669         MajorVersion = MinorVersion = 0;
 670         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 671                 vidmode_ext = false;
 672         else
 673         {
 674                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 675                 vidmode_ext = true;
 676         }
 677
 678         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 679          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 680          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 681          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 682          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 683          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 684         {
 685                 Con_Printf("glX functions not found in %s\n", gl_driver);
 686                 return false;
 687         }
 688
 689         VID_BuildGLXAttrib(attrib, bpp == 32);
 690         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 691         if (!visinfo)
 692         {
 693                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 694                 return false;
 695         }
 696
 697         if (vidmode_ext)
 698         {
 699                 int best_fit, best_dist, dist, x, y;
 700
 701                 // Are we going fullscreen?  If so, let's change video mode
 702                 if (fullscreen)
 703                 {
 704                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 705                         best_dist = 9999999;
 706                         best_fit = -1;
 707
 708                         for (i = 0; i < num_vidmodes; i++)
 709                         {
 710                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 711                                         continue;
 712
 713                                 x = width - vidmodes[i]->hdisplay;
 714                                 y = height - vidmodes[i]->vdisplay;
 715                                 dist = (x * x) + (y * y);
 716                                 if (dist < best_dist)
 717                                 {
 718                                         best_dist = dist;
 719                                         best_fit = i;
 720                                 }
 721                         }
 722
 723                         if (best_fit != -1)
 724                         {
 725                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 726                                 // to width/height =, so the window will take the full area of
 727                                 // the mode chosen
 728                                 width = vidmodes[best_fit]->hdisplay;
 729                                 height = vidmodes[best_fit]->vdisplay;
 730
 731                                 // change to the mode
 732                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 733                                 vid_isfullscreen = true;
 734
 735                                 // Move the viewport to top left
 736                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 737                         }
 738                         else
 739                                 fullscreen = 0;
 740                 }
 741         }
 742
 743         // LordHavoc: save the visual for use in gamma ramp settings later
 744         vidx11_visual = visinfo->visual;
 745
 746         /* window attributes */
 747         attr.background_pixel = 0;
 748         attr.border_pixel = 0;
 749         // LordHavoc: save the colormap for later, too
 750         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 751         attr.event_mask = X_MASK;
 752         if (vid_isfullscreen)
 753         {
 754                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 755                 attr.override_redirect = True;
 756                 attr.backing_store = NotUseful;
 757                 attr.save_under = False;
 758         }
 759         else
 760                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 761
 762         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 763         XStoreName(vidx11_display, win, gamename);
 764         XMapWindow(vidx11_display, win);
 765
 766         // LordHavoc: making the close button on a window do the right thing
 767         // seems to involve this mess, sigh...
 768         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 769         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 770
 771         if (vid_isfullscreen)
 772         {
 773                 XMoveWindow(vidx11_display, win, 0, 0);
 774                 XRaiseWindow(vidx11_display, win);
 775                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 776                 XFlush(vidx11_display);
 777                 // Move the viewport to top left
 778                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 779         }
 780
 781         //XSync(vidx11_display, False);
 782
 783         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 784         if (!ctx)
 785         {
 786                 Con_Printf ("glXCreateContext failed\n");
 787                 return false;
 788         }
 789
 790         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 791         {
 792                 Con_Printf ("glXMakeCurrent failed\n");
 793                 return false;
 794         }
 795
 796         XSync(vidx11_display, False);
 797
 798         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 799         {
 800                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 801                 return false;
 802         }
 803
 804         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 805         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 806         gl_version = (const char *)qglGetString(GL_VERSION);
 807         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 808         gl_platform = "GLX";
 809         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 810
 811         gl_videosyncavailable = false;
 812
 813 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 814 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 815 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 816         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 817 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 818 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 819 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 820         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 821
 822         vid_usingmouse = false;
 823         vid_usingvsync = false;
 824         vid_hidden = false;
 825         vid_activewindow = true;
 826         GL_Init();
 827         return true;
 828 }
 829
 830 void Sys_SendKeyEvents(void)
 831 {
 832         HandleEvents();
 833 }
 834
 835 void IN_Move (void)
 836 {
 837         if (mouse_avail)
 838         {
 839                 in_mouse_x = mouse_x;
 840                 in_mouse_y = mouse_y;
 841         }
 842         mouse_x = 0;
 843         mouse_y = 0;
 844 }