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_Alt_R:
 203                 case XK_Meta_R: key = K_ALT;                    break;
 204
 205                 case XK_KP_Begin: key = K_KP_5; break;
 206
 207                 case XK_Insert:key = K_INS; break;
 208                 case XK_KP_Insert: key = K_KP_INS; break;
 209
 210                 case XK_KP_Multiply: key = '*'; break;
 211                 case XK_KP_Add:  key = K_KP_PLUS; break;
 212                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 213                 case XK_KP_Divide: key = K_KP_SLASH; break;
 214
 215                 case XK_section:        key = '~'; break;
 216
 217                 default:
 218                         if (keysym < 32)
 219                                 break;
 220
 221                         if (keysym >= 'A' && keysym <= 'Z')
 222                                 key = keysym - 'A' + 'a';
 223                         else
 224                                 key = keysym;
 225
 226                         break;
 227         }
 228
 229         return key;
 230 }
 231
 232 static Cursor CreateNullCursor(Display *display, Window root)
 233 {
 234         Pixmap cursormask;
 235         XGCValues xgc;
 236         GC gc;
 237         XColor dummycolour;
 238         Cursor cursor;
 239
 240         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 241         xgc.function = GXclear;
 242         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 243         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 244         dummycolour.pixel = 0;
 245         dummycolour.red = 0;
 246         dummycolour.flags = 04;
 247         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 248         XFreePixmap(display,cursormask);
 249         XFreeGC(display,gc);
 250         return cursor;
 251 }
 252
 253 static void IN_Activate (qboolean grab)
 254 {
 255         if (!vidx11_display)
 256                 return;
 257         if (grab)
 258         {
 259                 if (!vid_usingmouse && mouse_avail && win)
 260                 {
 261                         XWindowAttributes attribs_1;
 262                         XSetWindowAttributes attribs_2;
 263
 264                         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 265                         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 266                         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 267
 268                 // inviso cursor
 269                         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 270
 271                         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 272
 273 #if !defined(__APPLE__) && !defined(SUNOS)
 274                         if (vid_dga.integer)
 275                         {
 276                                 int MajorVersion, MinorVersion;
 277
 278                                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 279                                 {
 280                                         // unable to query, probably not supported
 281                                         Con_Print( "Failed to detect XF86DGA Mouse\n" );
 282                                         Cvar_SetValueQuick(&vid_dga, 0);
 283                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 284                                 }
 285                                 else
 286                                 {
 287                                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 288                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 289                                 }
 290                         }
 291                         else
 292 #endif
 293                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 294
 295                         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 296
 297                         mouse_x = mouse_y = 0;
 298                         cl_ignoremousemove = true;
 299                         vid_usingmouse = true;
 300                 }
 301         }
 302         else
 303         {
 304                 if (vid_usingmouse)
 305                 {
 306 #if !defined(__APPLE__) && !defined(SUNOS)
 307                         if (vid_dga.integer)
 308                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 309 #endif
 310
 311                         XUngrabPointer(vidx11_display, CurrentTime);
 312                         XUngrabKeyboard(vidx11_display, CurrentTime);
 313
 314                         // inviso cursor
 315                         if (win)
 316                                 XUndefineCursor(vidx11_display, win);
 317
 318                         cl_ignoremousemove = true;
 319                         vid_usingmouse = false;
 320                 }
 321         }
 322 }
 323
 324 static keynum_t buttonremap[18] =
 325 {
 326         K_MOUSE1,
 327         K_MOUSE3,
 328         K_MOUSE2,
 329         K_MWHEELUP,
 330         K_MWHEELDOWN,
 331         K_MOUSE4,
 332         K_MOUSE5,
 333         K_MOUSE6,
 334         K_MOUSE7,
 335         K_MOUSE8,
 336         K_MOUSE9,
 337         K_MOUSE10,
 338         K_MOUSE11,
 339         K_MOUSE12,
 340         K_MOUSE13,
 341         K_MOUSE14,
 342         K_MOUSE15,
 343         K_MOUSE16,
 344 };
 345
 346 static void HandleEvents(void)
 347 {
 348         XEvent event;
 349         int key;
 350         char ascii;
 351         qboolean dowarp = false;
 352
 353         if (!vidx11_display)
 354                 return;
 355
 356         while (XPending(vidx11_display))
 357         {
 358                 XNextEvent(vidx11_display, &event);
 359
 360                 switch (event.type)
 361                 {
 362                 case KeyPress:
 363                         // key pressed
 364                         key = XLateKey (&event.xkey, &ascii);
 365                         Key_Event(key, ascii, true);
 366                         break;
 367
 368                 case KeyRelease:
 369                         // key released
 370                         key = XLateKey (&event.xkey, &ascii);
 371                         Key_Event(key, ascii, false);
 372                         break;
 373
 374                 case MotionNotify:
 375                         // mouse moved
 376                         if (vid_usingmouse)
 377                         {
 378 #if !defined(__APPLE__) && !defined(SUNOS)
 379                                 if (vid_dga.integer == 1)
 380                                 {
 381                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 382                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 383                                 }
 384                                 else
 385 #endif
 386                                 {
 387
 388                                         if (!event.xmotion.send_event)
 389                                         {
 390                                                 mouse_x += event.xmotion.x - p_mouse_x;
 391                                                 mouse_y += event.xmotion.y - p_mouse_y;
 392                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 393                                                         dowarp = true;
 394                                         }
 395                                         p_mouse_x = event.xmotion.x;
 396                                         p_mouse_y = event.xmotion.y;
 397                                 }
 398                         }
 399                         //else
 400                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 401                         break;
 402
 403                 case ButtonPress:
 404                         // mouse button pressed
 405                         if (event.xbutton.button <= 18)
 406                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 407                         else
 408                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 409                         break;
 410
 411                 case ButtonRelease:
 412                         // mouse button released
 413                         if (event.xbutton.button <= 18)
 414                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 415                         else
 416                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 417                         break;
 418
 419                 case CreateNotify:
 420                         // window created
 421                         win_x = event.xcreatewindow.x;
 422                         win_y = event.xcreatewindow.y;
 423                         break;
 424
 425                 case ConfigureNotify:
 426                         // window changed size/location
 427                         win_x = event.xconfigure.x;
 428                         win_y = event.xconfigure.y;
 429                         break;
 430                 case DestroyNotify:
 431                         // window has been destroyed
 432                         Sys_Quit();
 433                         break;
 434                 case ClientMessage:
 435                         // window manager messages
 436                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 437                                 Sys_Quit();
 438                         break;
 439                 case MapNotify:
 440                         // window restored
 441                         vid_hidden = false;
 442                         vid_activewindow = false;
 443                         VID_RestoreSystemGamma();
 444                         break;
 445                 case UnmapNotify:
 446                         // window iconified/rolledup/whatever
 447                         vid_hidden = true;
 448                         vid_activewindow = false;
 449                         VID_RestoreSystemGamma();
 450                         break;
 451                 case FocusIn:
 452                         // window is now the input focus
 453                         vid_activewindow = true;
 454                         break;
 455                 case FocusOut:
 456                         // window is no longer the input focus
 457                         vid_activewindow = false;
 458                         VID_RestoreSystemGamma();
 459                         break;
 460                 case EnterNotify:
 461                         // mouse entered window
 462                         break;
 463                 case LeaveNotify:
 464                         // mouse left window
 465                         break;
 466                 }
 467         }
 468
 469         if (dowarp)
 470         {
 471                 /* move the mouse to the window center again */
 472                 p_mouse_x = vid.width / 2;
 473                 p_mouse_y = vid.height / 2;
 474                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 475         }
 476 }
 477
 478 static void *prjobj = NULL;
 479
 480 static void GL_CloseLibrary(void)
 481 {
 482         if (prjobj)
 483                 dlclose(prjobj);
 484         prjobj = NULL;
 485         gl_driver[0] = 0;
 486         qglXGetProcAddressARB = NULL;
 487         gl_extensions = "";
 488         gl_platform = "";
 489         gl_platformextensions = "";
 490 }
 491
 492 static int GL_OpenLibrary(const char *name)
 493 {
 494         Con_Printf("Loading OpenGL driver %s\n", name);
 495         GL_CloseLibrary();
 496         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 497         {
 498                 Con_Printf("Unable to open symbol list for %s\n", name);
 499                 return false;
 500         }
 501         strcpy(gl_driver, name);
 502         return true;
 503 }
 504
 505 void *GL_GetProcAddress(const char *name)
 506 {
 507         void *p = NULL;
 508         if (qglXGetProcAddressARB != NULL)
 509                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 510         if (p == NULL)
 511                 p = (void *) dlsym(prjobj, name);
 512         return p;
 513 }
 514
 515 void VID_Shutdown(void)
 516 {
 517         if (!ctx || !vidx11_display)
 518                 return;
 519
 520         if (vidx11_display)
 521         {
 522                 IN_Activate(false);
 523                 VID_RestoreSystemGamma();
 524
 525                 // FIXME: glXDestroyContext here?
 526                 if (vid_isfullscreen)
 527                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, &init_vidmode);
 528                 if (win)
 529                         XDestroyWindow(vidx11_display, win);
 530                 XCloseDisplay(vidx11_display);
 531         }
 532         vid_hidden = true;
 533         vid_isfullscreen = false;
 534         vidx11_display = NULL;
 535         win = 0;
 536         ctx = NULL;
 537
 538         GL_CloseLibrary();
 539         Key_ClearStates ();
 540 }
 541
 542 void signal_handler(int sig)
 543 {
 544         Con_Printf("Received signal %d, exiting...\n", sig);
 545         VID_RestoreSystemGamma();
 546         Sys_Quit();
 547         exit(0);
 548 }
 549
 550 void InitSig(void)
 551 {
 552         signal(SIGHUP, signal_handler);
 553         signal(SIGINT, signal_handler);
 554         signal(SIGQUIT, signal_handler);
 555         signal(SIGILL, signal_handler);
 556         signal(SIGTRAP, signal_handler);
 557         signal(SIGIOT, signal_handler);
 558         signal(SIGBUS, signal_handler);
 559         signal(SIGFPE, signal_handler);
 560         signal(SIGSEGV, signal_handler);
 561         signal(SIGTERM, signal_handler);
 562 }
 563
 564 void VID_Finish (qboolean allowmousegrab)
 565 {
 566         qboolean vid_usemouse;
 567
 568         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 569         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 570         {
 571                 vid_usingvsync = vid_usevsync;
 572                 if (qglXSwapIntervalSGI (vid_usevsync))
 573                         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");
 574         }
 575
 576 // handle the mouse state when windowed if that's changed
 577         vid_usemouse = false;
 578         if (allowmousegrab && vid_mouse.integer && !key_consoleactive && !cls.demoplayback)
 579                 vid_usemouse = true;
 580         if (!vid_activewindow)
 581                 vid_usemouse = false;
 582         if (vid_isfullscreen)
 583                 vid_usemouse = true;
 584         IN_Activate(vid_usemouse);
 585
 586         if (r_render.integer)
 587         {
 588                 if (r_speeds.integer || gl_finish.integer)
 589                         qglFinish();
 590                 qglXSwapBuffers(vidx11_display, win);
 591         }
 592
 593         if (vid_x11_hardwaregammasupported)
 594                 VID_UpdateGamma(false, vid_x11_gammarampsize);
 595 }
 596
 597 int VID_SetGamma(unsigned short *ramps, int rampsize)
 598 {
 599         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 600 }
 601
 602 int VID_GetGamma(unsigned short *ramps, int rampsize)
 603 {
 604         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 605 }
 606
 607 void VID_Init(void)
 608 {
 609 #if !defined(__APPLE__) && !defined(SUNOS)
 610         Cvar_RegisterVariable (&vid_dga);
 611         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 612 #endif
 613         InitSig(); // trap evil signals
 614 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 615         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 616                 mouse_avail = false;
 617 }
 618
 619 void VID_BuildGLXAttrib(int *attrib, int stencil)
 620 {
 621         *attrib++ = GLX_RGBA;
 622         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 623         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 624         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 625         *attrib++ = GLX_DOUBLEBUFFER;
 626         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 627         // if stencil is enabled, ask for alpha too
 628         if (stencil)
 629         {
 630                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 631                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 632         }
 633         *attrib++ = None;
 634 }
 635
 636 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate)
 637 {
 638         int i;
 639         int attrib[32];
 640         XSetWindowAttributes attr;
 641         unsigned long mask;
 642         Window root;
 643         XVisualInfo *visinfo;
 644         int MajorVersion, MinorVersion;
 645         const char *drivername;
 646
 647 #if defined(__APPLE__) && defined(__MACH__)
 648         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 649 #else
 650         drivername = "libGL.so.1";
 651 #endif
 652 // 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
 653 // 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
 654 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 655         i = COM_CheckParm("-gl_driver");
 656         if (i && i < com_argc - 1)
 657                 drivername = com_argv[i + 1];
 658         if (!GL_OpenLibrary(drivername))
 659         {
 660                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 661                 return false;
 662         }
 663
 664         if (!(vidx11_display = XOpenDisplay(NULL)))
 665         {
 666                 Con_Print("Couldn't open the X display\n");
 667                 return false;
 668         }
 669
 670         vidx11_screen = DefaultScreen(vidx11_display);
 671         root = RootWindow(vidx11_display, vidx11_screen);
 672
 673         // Get video mode list
 674         MajorVersion = MinorVersion = 0;
 675         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 676                 vidmode_ext = false;
 677         else
 678         {
 679                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 680                 vidmode_ext = true;
 681         }
 682
 683         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 684          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 685          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 686          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 687          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 688          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 689         {
 690                 Con_Printf("glX functions not found in %s\n", gl_driver);
 691                 return false;
 692         }
 693
 694         VID_BuildGLXAttrib(attrib, bpp == 32);
 695         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 696         if (!visinfo)
 697         {
 698                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 699                 return false;
 700         }
 701
 702         if (vidmode_ext)
 703         {
 704                 int best_fit, best_dist, dist, x, y;
 705
 706                 // Are we going fullscreen?  If so, let's change video mode
 707                 if (fullscreen)
 708                 {
 709                         XF86VidModeModeLine *current_vidmode;
 710                         XF86VidModeModeInfo **vidmodes;
 711                         int num_vidmodes;
 712
 713                         // This nice hack comes from the SDL source code
 714                         current_vidmode = (XF86VidModeModeLine*)((char*)&init_vidmode + sizeof(init_vidmode.dotclock));
 715                         XF86VidModeGetModeLine(vidx11_display, vidx11_screen, (int*)&init_vidmode.dotclock, current_vidmode);
 716
 717                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 718                         best_dist = 9999999;
 719                         best_fit = -1;
 720
 721                         for (i = 0; i < num_vidmodes; i++)
 722                         {
 723                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 724                                         continue;
 725
 726                                 x = width - vidmodes[i]->hdisplay;
 727                                 y = height - vidmodes[i]->vdisplay;
 728                                 dist = (x * x) + (y * y);
 729                                 if (dist < best_dist)
 730                                 {
 731                                         best_dist = dist;
 732                                         best_fit = i;
 733                                 }
 734                         }
 735
 736                         if (best_fit != -1)
 737                         {
 738                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 739                                 // to width/height =, so the window will take the full area of
 740                                 // the mode chosen
 741                                 width = vidmodes[best_fit]->hdisplay;
 742                                 height = vidmodes[best_fit]->vdisplay;
 743
 744                                 // change to the mode
 745                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 746                                 vid_isfullscreen = true;
 747
 748                                 // Move the viewport to top left
 749                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 750                         }
 751                         else
 752                                 fullscreen = 0;
 753
 754                         free(vidmodes);
 755                 }
 756         }
 757
 758         // LordHavoc: save the visual for use in gamma ramp settings later
 759         vidx11_visual = visinfo->visual;
 760
 761         /* window attributes */
 762         attr.background_pixel = 0;
 763         attr.border_pixel = 0;
 764         // LordHavoc: save the colormap for later, too
 765         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 766         attr.event_mask = X_MASK;
 767         if (vid_isfullscreen)
 768         {
 769                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 770                 attr.override_redirect = True;
 771                 attr.backing_store = NotUseful;
 772                 attr.save_under = False;
 773         }
 774         else
 775                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 776
 777         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 778         XStoreName(vidx11_display, win, gamename);
 779         XMapWindow(vidx11_display, win);
 780
 781         // LordHavoc: making the close button on a window do the right thing
 782         // seems to involve this mess, sigh...
 783         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 784         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 785
 786         if (vid_isfullscreen)
 787         {
 788                 XMoveWindow(vidx11_display, win, 0, 0);
 789                 XRaiseWindow(vidx11_display, win);
 790                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 791                 XFlush(vidx11_display);
 792                 // Move the viewport to top left
 793                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 794         }
 795
 796         //XSync(vidx11_display, False);
 797
 798         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 799         if (!ctx)
 800         {
 801                 Con_Printf ("glXCreateContext failed\n");
 802                 return false;
 803         }
 804
 805         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 806         {
 807                 Con_Printf ("glXMakeCurrent failed\n");
 808                 return false;
 809         }
 810
 811         XSync(vidx11_display, False);
 812
 813         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 814         {
 815                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 816                 return false;
 817         }
 818
 819         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 820         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 821         gl_version = (const char *)qglGetString(GL_VERSION);
 822         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 823         gl_platform = "GLX";
 824         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 825
 826         gl_videosyncavailable = false;
 827
 828 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 829 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 830 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 831         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 832 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 833 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 834 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 835         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 836
 837         vid_usingmouse = false;
 838         vid_usingvsync = false;
 839         vid_hidden = false;
 840         vid_activewindow = true;
 841         vid_x11_hardwaregammasupported = XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &vid_x11_gammarampsize) != 0;
 842         GL_Init();
 843         return true;
 844 }
 845
 846 void Sys_SendKeyEvents(void)
 847 {
 848         HandleEvents();
 849 }
 850
 851 void IN_Move (void)
 852 {
 853         if (mouse_avail)
 854         {
 855                 in_mouse_x = mouse_x;
 856                 in_mouse_y = mouse_y;
 857         }
 858         mouse_x = 0;
 859         mouse_y = 0;
 860 }