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 //GLX prototypes
  49 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  50 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  51 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  52 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  53 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  54 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  55
  56 //GLX_ARB_get_proc_address
  57 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  58
  59 static dllfunction_t getprocaddressfuncs[] =
  60 {
  61         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  62         {NULL, NULL}
  63 };
  64
  65 //GLX_SGI_swap_control
  66 GLint (GLAPIENTRY *qglXSwapIntervalSGI)(GLint interval);
  67
  68 static dllfunction_t swapcontrolfuncs[] =
  69 {
  70         {"glXSwapIntervalSGI", (void **) &qglXSwapIntervalSGI},
  71         {NULL, NULL}
  72 };
  73
  74 static Display *vidx11_display = NULL;
  75 static int vidx11_screen;
  76 static Window win;
  77 static GLXContext ctx = NULL;
  78
  79 Atom wm_delete_window_atom;
  80
  81 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  82 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  83                     PointerMotionMask | ButtonMotionMask)
  84 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  85                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  86                 LeaveWindowMask)
  87
  88
  89 static qboolean mouse_avail = true;
  90 static qboolean vid_usingmouse = false;
  91 static qboolean vid_usingvsync = false;
  92 static qboolean vid_usevsync = false;
  93 static float    mouse_x, mouse_y;
  94 static int p_mouse_x, p_mouse_y;
  95
  96 #if !defined(__APPLE__) && !defined(SUNOS)
  97 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
  98 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
  99 #endif
 100
 101 qboolean vidmode_ext = false;
 102
 103 static int win_x, win_y;
 104
 105 static XF86VidModeModeInfo **vidmodes;
 106 static int num_vidmodes;
 107 static qboolean vid_isfullscreen = false;
 108
 109 static Visual *vidx11_visual;
 110 static Colormap vidx11_colormap;
 111
 112 /*-----------------------------------------------------------------------*/
 113
 114 static int XLateKey(XKeyEvent *ev, char *ascii)
 115 {
 116         int key = 0;
 117         char buf[64];
 118         KeySym keysym, shifted;
 119
 120         keysym = XLookupKeysym (ev, 0);
 121         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 122         *ascii = buf[0];
 123
 124         switch(keysym)
 125         {
 126                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 127                 case XK_Page_Up:         key = K_PGUP; break;
 128
 129                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 130                 case XK_Page_Down:       key = K_PGDN; break;
 131
 132                 case XK_KP_Home: key = K_KP_HOME; break;
 133                 case XK_Home:    key = K_HOME; break;
 134
 135                 case XK_KP_End:  key = K_KP_END; break;
 136                 case XK_End:     key = K_END; break;
 137
 138                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 139                 case XK_Left:    key = K_LEFTARROW; break;
 140
 141                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 142                 case XK_Right:  key = K_RIGHTARROW;             break;
 143
 144                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 145                 case XK_Down:    key = K_DOWNARROW; break;
 146
 147                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 148                 case XK_Up:              key = K_UPARROW;        break;
 149
 150                 case XK_Escape: key = K_ESCAPE;         break;
 151
 152                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 153                 case XK_Return: key = K_ENTER;           break;
 154
 155                 case XK_Tab:            key = K_TAB;                     break;
 156
 157                 case XK_F1:              key = K_F1;                            break;
 158
 159                 case XK_F2:              key = K_F2;                            break;
 160
 161                 case XK_F3:              key = K_F3;                            break;
 162
 163                 case XK_F4:              key = K_F4;                            break;
 164
 165                 case XK_F5:              key = K_F5;                            break;
 166
 167                 case XK_F6:              key = K_F6;                            break;
 168
 169                 case XK_F7:              key = K_F7;                            break;
 170
 171                 case XK_F8:              key = K_F8;                            break;
 172
 173                 case XK_F9:              key = K_F9;                            break;
 174
 175                 case XK_F10:            key = K_F10;                     break;
 176
 177                 case XK_F11:            key = K_F11;                     break;
 178
 179                 case XK_F12:            key = K_F12;                     break;
 180
 181                 case XK_BackSpace: key = K_BACKSPACE; break;
 182
 183                 case XK_KP_Delete: key = K_KP_DEL; break;
 184                 case XK_Delete: key = K_DEL; break;
 185
 186                 case XK_Pause:  key = K_PAUSE;           break;
 187
 188                 case XK_Shift_L:
 189                 case XK_Shift_R:        key = K_SHIFT;          break;
 190
 191                 case XK_Execute:
 192                 case XK_Control_L:
 193                 case XK_Control_R:      key = K_CTRL;            break;
 194
 195                 case XK_Alt_L:
 196                 case XK_Meta_L:
 197                 case XK_Alt_R:
 198                 case XK_Meta_R: key = K_ALT;                    break;
 199
 200                 case XK_KP_Begin: key = K_KP_5; break;
 201
 202                 case XK_Insert:key = K_INS; break;
 203                 case XK_KP_Insert: key = K_KP_INS; break;
 204
 205                 case XK_KP_Multiply: key = '*'; break;
 206                 case XK_KP_Add:  key = K_KP_PLUS; break;
 207                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 208                 case XK_KP_Divide: key = K_KP_SLASH; break;
 209
 210                 case XK_section:        key = '~'; break;
 211
 212                 default:
 213                         if (keysym < 32)
 214                                 break;
 215
 216                         if (keysym >= 'A' && keysym <= 'Z')
 217                                 key = keysym - 'A' + 'a';
 218                         else
 219                                 key = keysym;
 220
 221                         break;
 222         }
 223
 224         return key;
 225 }
 226
 227 static Cursor CreateNullCursor(Display *display, Window root)
 228 {
 229         Pixmap cursormask;
 230         XGCValues xgc;
 231         GC gc;
 232         XColor dummycolour;
 233         Cursor cursor;
 234
 235         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 236         xgc.function = GXclear;
 237         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 238         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 239         dummycolour.pixel = 0;
 240         dummycolour.red = 0;
 241         dummycolour.flags = 04;
 242         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 243         XFreePixmap(display,cursormask);
 244         XFreeGC(display,gc);
 245         return cursor;
 246 }
 247
 248 static void IN_Activate (qboolean grab)
 249 {
 250         if (!vidx11_display)
 251                 return;
 252         if (grab)
 253         {
 254                 if (!vid_usingmouse && mouse_avail && win)
 255                 {
 256                         XWindowAttributes attribs_1;
 257                         XSetWindowAttributes attribs_2;
 258
 259                         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 260                         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 261                         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 262
 263                 // inviso cursor
 264                         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 265
 266                         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 267
 268 #if !defined(__APPLE__) && !defined(SUNOS)
 269                         if (vid_dga.integer)
 270                         {
 271                                 int MajorVersion, MinorVersion;
 272
 273                                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 274                                 {
 275                                         // unable to query, probably not supported
 276                                         Con_Print( "Failed to detect XF86DGA Mouse\n" );
 277                                         Cvar_SetValueQuick(&vid_dga, 0);
 278                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 279                                 }
 280                                 else
 281                                 {
 282                                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 283                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 284                                 }
 285                         }
 286                         else
 287 #endif
 288                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 289
 290                         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 291
 292                         mouse_x = mouse_y = 0;
 293                         cl_ignoremousemove = true;
 294                         vid_usingmouse = true;
 295                 }
 296         }
 297         else
 298         {
 299                 if (vid_usingmouse)
 300                 {
 301 #if !defined(__APPLE__) && !defined(SUNOS)
 302                         if (vid_dga.integer)
 303                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 304 #endif
 305
 306                         XUngrabPointer(vidx11_display, CurrentTime);
 307                         XUngrabKeyboard(vidx11_display, CurrentTime);
 308
 309                         // inviso cursor
 310                         if (win)
 311                                 XUndefineCursor(vidx11_display, win);
 312
 313                         cl_ignoremousemove = true;
 314                         vid_usingmouse = false;
 315                 }
 316         }
 317 }
 318
 319 static keynum_t buttonremap[18] =
 320 {
 321         K_MOUSE1,
 322         K_MOUSE3,
 323         K_MOUSE2,
 324         K_MWHEELUP,
 325         K_MWHEELDOWN,
 326         K_MOUSE4,
 327         K_MOUSE5,
 328         K_MOUSE6,
 329         K_MOUSE7,
 330         K_MOUSE8,
 331         K_MOUSE9,
 332         K_MOUSE10,
 333         K_MOUSE11,
 334         K_MOUSE12,
 335         K_MOUSE13,
 336         K_MOUSE14,
 337         K_MOUSE15,
 338         K_MOUSE16,
 339 };
 340
 341 static void HandleEvents(void)
 342 {
 343         XEvent event;
 344         int key;
 345         char ascii;
 346         qboolean dowarp = false;
 347
 348         if (!vidx11_display)
 349                 return;
 350
 351         while (XPending(vidx11_display))
 352         {
 353                 XNextEvent(vidx11_display, &event);
 354
 355                 switch (event.type)
 356                 {
 357                 case KeyPress:
 358                         // key pressed
 359                         key = XLateKey (&event.xkey, &ascii);
 360                         Key_Event(key, ascii, true);
 361                         break;
 362
 363                 case KeyRelease:
 364                         // key released
 365                         key = XLateKey (&event.xkey, &ascii);
 366                         Key_Event(key, ascii, false);
 367                         break;
 368
 369                 case MotionNotify:
 370                         // mouse moved
 371                         if (vid_usingmouse)
 372                         {
 373 #if !defined(__APPLE__) && !defined(SUNOS)
 374                                 if (vid_dga.integer == 1)
 375                                 {
 376                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 377                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 378                                 }
 379                                 else
 380 #endif
 381                                 {
 382
 383                                         if (!event.xmotion.send_event)
 384                                         {
 385                                                 mouse_x += event.xmotion.x - p_mouse_x;
 386                                                 mouse_y += event.xmotion.y - p_mouse_y;
 387                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 388                                                         dowarp = true;
 389                                         }
 390                                         p_mouse_x = event.xmotion.x;
 391                                         p_mouse_y = event.xmotion.y;
 392                                 }
 393                         }
 394                         //else
 395                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 396                         break;
 397
 398                 case ButtonPress:
 399                         // mouse button pressed
 400                         if (event.xbutton.button <= 18)
 401                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 402                         else
 403                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 404                         break;
 405
 406                 case ButtonRelease:
 407                         // mouse button released
 408                         if (event.xbutton.button <= 18)
 409                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 410                         else
 411                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 412                         break;
 413
 414                 case CreateNotify:
 415                         // window created
 416                         win_x = event.xcreatewindow.x;
 417                         win_y = event.xcreatewindow.y;
 418                         break;
 419
 420                 case ConfigureNotify:
 421                         // window changed size/location
 422                         win_x = event.xconfigure.x;
 423                         win_y = event.xconfigure.y;
 424                         break;
 425                 case DestroyNotify:
 426                         // window has been destroyed
 427                         Sys_Quit();
 428                         break;
 429                 case ClientMessage:
 430                         // window manager messages
 431                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 432                                 Sys_Quit();
 433                         break;
 434                 case MapNotify:
 435                         // window restored
 436                         vid_hidden = false;
 437                         vid_activewindow = false;
 438                         VID_RestoreSystemGamma();
 439                         break;
 440                 case UnmapNotify:
 441                         // window iconified/rolledup/whatever
 442                         vid_hidden = true;
 443                         vid_activewindow = false;
 444                         VID_RestoreSystemGamma();
 445                         break;
 446                 case FocusIn:
 447                         // window is now the input focus
 448                         vid_activewindow = true;
 449                         break;
 450                 case FocusOut:
 451                         // window is no longer the input focus
 452                         vid_activewindow = false;
 453                         VID_RestoreSystemGamma();
 454                         break;
 455                 case EnterNotify:
 456                         // mouse entered window
 457                         break;
 458                 case LeaveNotify:
 459                         // mouse left window
 460                         break;
 461                 }
 462         }
 463
 464         if (dowarp)
 465         {
 466                 /* move the mouse to the window center again */
 467                 p_mouse_x = vid.width / 2;
 468                 p_mouse_y = vid.height / 2;
 469                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 470         }
 471 }
 472
 473 static void *prjobj = NULL;
 474
 475 static void GL_CloseLibrary(void)
 476 {
 477         if (prjobj)
 478                 dlclose(prjobj);
 479         prjobj = NULL;
 480         gl_driver[0] = 0;
 481         qglXGetProcAddressARB = NULL;
 482         gl_extensions = "";
 483         gl_platform = "";
 484         gl_platformextensions = "";
 485 }
 486
 487 static int GL_OpenLibrary(const char *name)
 488 {
 489         Con_Printf("Loading OpenGL driver %s\n", name);
 490         GL_CloseLibrary();
 491         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 492         {
 493                 Con_Printf("Unable to open symbol list for %s\n", name);
 494                 return false;
 495         }
 496         strcpy(gl_driver, name);
 497         return true;
 498 }
 499
 500 void *GL_GetProcAddress(const char *name)
 501 {
 502         void *p = NULL;
 503         if (qglXGetProcAddressARB != NULL)
 504                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 505         if (p == NULL)
 506                 p = (void *) dlsym(prjobj, name);
 507         return p;
 508 }
 509
 510 void VID_Shutdown(void)
 511 {
 512         if (!ctx || !vidx11_display)
 513                 return;
 514
 515         if (vidx11_display)
 516         {
 517                 IN_Activate(false);
 518                 VID_RestoreSystemGamma();
 519
 520                 // FIXME: glXDestroyContext here?
 521                 if (vid_isfullscreen)
 522                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 523                 if (win)
 524                         XDestroyWindow(vidx11_display, win);
 525                 XCloseDisplay(vidx11_display);
 526         }
 527         vid_hidden = true;
 528         vid_isfullscreen = false;
 529         vidx11_display = NULL;
 530         win = 0;
 531         ctx = NULL;
 532
 533         GL_CloseLibrary();
 534         Key_ClearStates ();
 535 }
 536
 537 void signal_handler(int sig)
 538 {
 539         Con_Printf("Received signal %d, exiting...\n", sig);
 540         VID_RestoreSystemGamma();
 541         Sys_Quit();
 542         exit(0);
 543 }
 544
 545 void InitSig(void)
 546 {
 547         signal(SIGHUP, signal_handler);
 548         signal(SIGINT, signal_handler);
 549         signal(SIGQUIT, signal_handler);
 550         signal(SIGILL, signal_handler);
 551         signal(SIGTRAP, signal_handler);
 552         signal(SIGIOT, signal_handler);
 553         signal(SIGBUS, signal_handler);
 554         signal(SIGFPE, signal_handler);
 555         signal(SIGSEGV, signal_handler);
 556         signal(SIGTERM, signal_handler);
 557 }
 558
 559 void VID_Finish (void)
 560 {
 561         qboolean vid_usemouse;
 562
 563         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 564         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 565         {
 566                 vid_usingvsync = vid_usevsync;
 567                 if (qglXSwapIntervalSGI (vid_usevsync))
 568                         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");
 569         }
 570
 571 // handle the mouse state when windowed if that's changed
 572         vid_usemouse = false;
 573         if (vid_mouse.integer && !key_consoleactive && !cls.demoplayback)
 574                 vid_usemouse = true;
 575         if (!vid_activewindow)
 576                 vid_usemouse = false;
 577         if (vid_isfullscreen)
 578                 vid_usemouse = true;
 579         IN_Activate(vid_usemouse);
 580
 581         if (r_render.integer)
 582         {
 583                 if (r_speeds.integer || gl_finish.integer)
 584                         qglFinish();
 585                 qglXSwapBuffers(vidx11_display, win);
 586         }
 587 }
 588
 589 int VID_SetGamma(unsigned short *ramps)
 590 {
 591         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 592 }
 593
 594 int VID_GetGamma(unsigned short *ramps)
 595 {
 596         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 597 }
 598
 599 void VID_Init(void)
 600 {
 601 #if !defined(__APPLE__) && !defined(SUNOS)
 602         Cvar_RegisterVariable (&vid_dga);
 603         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 604 #endif
 605         InitSig(); // trap evil signals
 606 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 607         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 608                 mouse_avail = false;
 609 }
 610
 611 void VID_BuildGLXAttrib(int *attrib, int stencil)
 612 {
 613         *attrib++ = GLX_RGBA;
 614         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 615         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 616         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 617         *attrib++ = GLX_DOUBLEBUFFER;
 618         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 619         // if stencil is enabled, ask for alpha too
 620         if (stencil)
 621         {
 622                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 623                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 624         }
 625         *attrib++ = None;
 626 }
 627
 628 int VID_InitMode(int fullscreen, int width, int height, int bpp)
 629 {
 630         int i;
 631         int attrib[32];
 632         XSetWindowAttributes attr;
 633         unsigned long mask;
 634         Window root;
 635         XVisualInfo *visinfo;
 636         int MajorVersion, MinorVersion;
 637         const char *drivername;
 638
 639 #if defined(__APPLE__) && defined(__MACH__)
 640         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 641 #else
 642         drivername = "libGL.so.1";
 643 #endif
 644 // 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
 645 // 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
 646 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 647         i = COM_CheckParm("-gl_driver");
 648         if (i && i < com_argc - 1)
 649                 drivername = com_argv[i + 1];
 650         if (!GL_OpenLibrary(drivername))
 651         {
 652                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 653                 return false;
 654         }
 655
 656         if (!(vidx11_display = XOpenDisplay(NULL)))
 657         {
 658                 Con_Print("Couldn't open the X display\n");
 659                 return false;
 660         }
 661
 662         vidx11_screen = DefaultScreen(vidx11_display);
 663         root = RootWindow(vidx11_display, vidx11_screen);
 664
 665         // Get video mode list
 666         MajorVersion = MinorVersion = 0;
 667         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 668                 vidmode_ext = false;
 669         else
 670         {
 671                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 672                 vidmode_ext = true;
 673         }
 674
 675         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 676          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 677          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 678          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 679          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 680          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 681         {
 682                 Con_Printf("glX functions not found in %s\n", gl_driver);
 683                 return false;
 684         }
 685
 686         VID_BuildGLXAttrib(attrib, bpp == 32);
 687         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 688         if (!visinfo)
 689         {
 690                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 691                 return false;
 692         }
 693
 694         if (vidmode_ext)
 695         {
 696                 int best_fit, best_dist, dist, x, y;
 697
 698                 // Are we going fullscreen?  If so, let's change video mode
 699                 if (fullscreen)
 700                 {
 701                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 702                         best_dist = 9999999;
 703                         best_fit = -1;
 704
 705                         for (i = 0; i < num_vidmodes; i++)
 706                         {
 707                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 708                                         continue;
 709
 710                                 x = width - vidmodes[i]->hdisplay;
 711                                 y = height - vidmodes[i]->vdisplay;
 712                                 dist = (x * x) + (y * y);
 713                                 if (dist < best_dist)
 714                                 {
 715                                         best_dist = dist;
 716                                         best_fit = i;
 717                                 }
 718                         }
 719
 720                         if (best_fit != -1)
 721                         {
 722                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 723                                 // to width/height =, so the window will take the full area of
 724                                 // the mode chosen
 725                                 width = vidmodes[best_fit]->hdisplay;
 726                                 height = vidmodes[best_fit]->vdisplay;
 727
 728                                 // change to the mode
 729                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 730                                 vid_isfullscreen = true;
 731
 732                                 // Move the viewport to top left
 733                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 734                         }
 735                         else
 736                                 fullscreen = 0;
 737                 }
 738         }
 739
 740         // LordHavoc: save the visual for use in gamma ramp settings later
 741         vidx11_visual = visinfo->visual;
 742
 743         /* window attributes */
 744         attr.background_pixel = 0;
 745         attr.border_pixel = 0;
 746         // LordHavoc: save the colormap for later, too
 747         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 748         attr.event_mask = X_MASK;
 749         if (vid_isfullscreen)
 750         {
 751                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 752                 attr.override_redirect = True;
 753                 attr.backing_store = NotUseful;
 754                 attr.save_under = False;
 755         }
 756         else
 757                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 758
 759         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 760         XStoreName(vidx11_display, win, gamename);
 761         XMapWindow(vidx11_display, win);
 762
 763         // LordHavoc: making the close button on a window do the right thing
 764         // seems to involve this mess, sigh...
 765         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 766         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 767
 768         if (vid_isfullscreen)
 769         {
 770                 XMoveWindow(vidx11_display, win, 0, 0);
 771                 XRaiseWindow(vidx11_display, win);
 772                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 773                 XFlush(vidx11_display);
 774                 // Move the viewport to top left
 775                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 776         }
 777
 778         //XSync(vidx11_display, False);
 779
 780         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 781         if (!ctx)
 782         {
 783                 Con_Printf ("glXCreateContext failed\n");
 784                 return false;
 785         }
 786
 787         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 788         {
 789                 Con_Printf ("glXMakeCurrent failed\n");
 790                 return false;
 791         }
 792
 793         XSync(vidx11_display, False);
 794
 795         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 796         {
 797                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 798                 return false;
 799         }
 800
 801         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 802         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 803         gl_version = (const char *)qglGetString(GL_VERSION);
 804         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 805         gl_platform = "GLX";
 806         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 807
 808         gl_videosyncavailable = false;
 809
 810 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 811 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 812 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 813         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 814 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 815 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 816 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 817         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 818
 819         vid_usingmouse = false;
 820         vid_usingvsync = false;
 821         vid_hidden = false;
 822         vid_activewindow = true;
 823         GL_Init();
 824         return true;
 825 }
 826
 827 void Sys_SendKeyEvents(void)
 828 {
 829         HandleEvents();
 830 }
 831
 832 void IN_Move (void)
 833 {
 834         if (mouse_avail)
 835         {
 836                 in_mouse_x = mouse_x;
 837                 in_mouse_y = mouse_y;
 838         }
 839         mouse_x = 0;
 840         mouse_y = 0;
 841 }