vid_glx.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18 */
  19
  20 //#include <termios.h>
  21 //#include <sys/ioctl.h>
  22 //#include <sys/stat.h>
  23 //#include <sys/vt.h>
  24 //#include <stdarg.h>
  25 //#include <stdio.h>
  26 #include <signal.h>
  27
  28 #include <dlfcn.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/Xutil.h>
  32 #include <GL/glx.h>
  33
  34 #include <X11/keysym.h>
  35 #include <X11/cursorfont.h>
  36
  37 #include <X11/extensions/XShm.h>
  38 #include <X11/extensions/xf86dga.h>
  39 #include <X11/extensions/xf86vmode.h>
  40
  41 #include "quakedef.h"
  42
  43 int cl_available = true;
  44
  45 //GLX prototypes
  46 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  47 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  48 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  49 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  50 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  51 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  52
  53 //GLX_ARB_get_proc_address
  54 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  55
  56 static dllfunction_t getprocaddressfuncs[] =
  57 {
  58         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  59         {NULL, NULL}
  60 };
  61
  62 //GLX_SGI_video_sync
  63 GLint (GLAPIENTRY *qglXGetVideoSyncSGI)(GLuint *count);
  64 GLint (GLAPIENTRY *qglXWaitVideoSyncSGI)(int divisor, int remainder, unsigned int *count);
  65
  66 static dllfunction_t videosyncfuncs[] =
  67 {
  68         {"glXGetVideoSyncSGI", (void **) &qglXGetVideoSyncSGI},
  69         {"glXWaitVideoSyncSGI", (void **) &qglXWaitVideoSyncSGI},
  70         {NULL, NULL}
  71 };
  72
  73 static Display *vidx11_display = NULL;
  74 static int scrnum;
  75 static Window win;
  76 static GLXContext ctx = NULL;
  77
  78 Atom wm_delete_window_atom;
  79
  80 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  81 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  82                     PointerMotionMask | ButtonMotionMask )
  83 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | StructureNotifyMask )
  84
  85
  86 static qboolean         mouse_avail = true;
  87 static qboolean         mouse_active = false, usingmouse = false;
  88 static float    mouse_x, mouse_y;
  89 static int p_mouse_x, p_mouse_y;
  90
  91 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
  92 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
  93
  94 qboolean vidmode_ext = false;
  95
  96 static int win_x, win_y;
  97
  98 static int scr_width, scr_height;
  99
 100 static XF86VidModeModeInfo **vidmodes;
 101 static int num_vidmodes;
 102 static qboolean vidmode_active = false;
 103
 104 static Visual *vidx11_visual;
 105 static Colormap vidx11_colormap;
 106
 107 /*-----------------------------------------------------------------------*/
 108
 109 static int XLateKey(XKeyEvent *ev)
 110 {
 111         int key = 0;
 112         char buf[64];
 113         KeySym keysym;
 114
 115         XLookupString(ev, buf, sizeof buf, &keysym, 0);
 116
 117         switch(keysym)
 118         {
 119                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 120                 case XK_Page_Up:         key = K_PGUP; break;
 121
 122                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 123                 case XK_Page_Down:       key = K_PGDN; break;
 124
 125                 case XK_KP_Home: key = K_KP_HOME; break;
 126                 case XK_Home:    key = K_HOME; break;
 127
 128                 case XK_KP_End:  key = K_KP_END; break;
 129                 case XK_End:     key = K_END; break;
 130
 131                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 132                 case XK_Left:    key = K_LEFTARROW; break;
 133
 134                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 135                 case XK_Right:  key = K_RIGHTARROW;             break;
 136
 137                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 138                 case XK_Down:    key = K_DOWNARROW; break;
 139
 140                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 141                 case XK_Up:              key = K_UPARROW;        break;
 142
 143                 case XK_Escape: key = K_ESCAPE;         break;
 144
 145                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 146                 case XK_Return: key = K_ENTER;           break;
 147
 148                 case XK_Tab:            key = K_TAB;                     break;
 149
 150                 case XK_F1:              key = K_F1;                            break;
 151
 152                 case XK_F2:              key = K_F2;                            break;
 153
 154                 case XK_F3:              key = K_F3;                            break;
 155
 156                 case XK_F4:              key = K_F4;                            break;
 157
 158                 case XK_F5:              key = K_F5;                            break;
 159
 160                 case XK_F6:              key = K_F6;                            break;
 161
 162                 case XK_F7:              key = K_F7;                            break;
 163
 164                 case XK_F8:              key = K_F8;                            break;
 165
 166                 case XK_F9:              key = K_F9;                            break;
 167
 168                 case XK_F10:            key = K_F10;                     break;
 169
 170                 case XK_F11:            key = K_F11;                     break;
 171
 172                 case XK_F12:            key = K_F12;                     break;
 173
 174                 case XK_BackSpace: key = K_BACKSPACE; break;
 175
 176                 case XK_KP_Delete: key = K_KP_DEL; break;
 177                 case XK_Delete: key = K_DEL; break;
 178
 179                 case XK_Pause:  key = K_PAUSE;           break;
 180
 181                 case XK_Shift_L:
 182                 case XK_Shift_R:        key = K_SHIFT;          break;
 183
 184                 case XK_Execute:
 185                 case XK_Control_L:
 186                 case XK_Control_R:      key = K_CTRL;            break;
 187
 188                 case XK_Alt_L:
 189                 case XK_Meta_L:
 190                 case XK_Alt_R:
 191                 case XK_Meta_R: key = K_ALT;                    break;
 192
 193                 case XK_KP_Begin: key = K_KP_5; break;
 194
 195                 case XK_Insert:key = K_INS; break;
 196                 case XK_KP_Insert: key = K_KP_INS; break;
 197
 198                 case XK_KP_Multiply: key = '*'; break;
 199                 case XK_KP_Add:  key = K_KP_PLUS; break;
 200                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 201                 case XK_KP_Divide: key = K_KP_SLASH; break;
 202
 203 #if 0
 204                 case 0x021: key = '1';break;/* [!] */
 205                 case 0x040: key = '2';break;/* [@] */
 206                 case 0x023: key = '3';break;/* [#] */
 207                 case 0x024: key = '4';break;/* [$] */
 208                 case 0x025: key = '5';break;/* [%] */
 209                 case 0x05e: key = '6';break;/* [^] */
 210                 case 0x026: key = '7';break;/* [&] */
 211                 case 0x02a: key = '8';break;/* [*] */
 212                 case 0x028: key = '9';;break;/* [(] */
 213                 case 0x029: key = '0';break;/* [)] */
 214                 case 0x05f: key = '-';break;/* [_] */
 215                 case 0x02b: key = '=';break;/* [+] */
 216                 case 0x07c: key = '\'';break;/* [|] */
 217                 case 0x07d: key = '[';break;/* [}] */
 218                 case 0x07b: key = ']';break;/* [{] */
 219                 case 0x022: key = '\'';break;/* ["] */
 220                 case 0x03a: key = ';';break;/* [:] */
 221                 case 0x03f: key = '/';break;/* [?] */
 222                 case 0x03e: key = '.';break;/* [>] */
 223                 case 0x03c: key = ',';break;/* [<] */
 224 #endif
 225
 226                 default:
 227                         key = *(unsigned char*)buf;
 228                         if (key >= 'A' && key <= 'Z')
 229                                 key = key - 'A' + 'a';
 230                         break;
 231         }
 232
 233         return key;
 234 }
 235
 236 static Cursor CreateNullCursor(Display *display, Window root)
 237 {
 238         Pixmap cursormask;
 239         XGCValues xgc;
 240         GC gc;
 241         XColor dummycolour;
 242         Cursor cursor;
 243
 244         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 245         xgc.function = GXclear;
 246         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 247         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 248         dummycolour.pixel = 0;
 249         dummycolour.red = 0;
 250         dummycolour.flags = 04;
 251         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 252         XFreePixmap(display,cursormask);
 253         XFreeGC(display,gc);
 254         return cursor;
 255 }
 256
 257 static void install_grabs(void)
 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 (vid_dga.integer)
 272         {
 273                 int MajorVersion, MinorVersion;
 274
 275                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 276                 {
 277                         // unable to query, probalby not supported
 278                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
 279                         vid_dga.integer = 0;
 280                 }
 281                 else
 282                 {
 283                         vid_dga.integer = 1;
 284                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 285                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 286                 }
 287         }
 288         else
 289                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
 290
 291         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 292
 293         mouse_active = true;
 294         mouse_x = mouse_y = 0;
 295 }
 296
 297 static void uninstall_grabs(void)
 298 {
 299         if (!vidx11_display || !win)
 300                 return;
 301
 302         if (vid_dga.integer == 1)
 303                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 304
 305         XUngrabPointer(vidx11_display, CurrentTime);
 306         XUngrabKeyboard(vidx11_display, CurrentTime);
 307
 308 // inviso cursor
 309         XUndefineCursor(vidx11_display, win);
 310
 311         mouse_active = false;
 312 }
 313
 314 static void HandleEvents(void)
 315 {
 316         XEvent event;
 317         qboolean dowarp = false;
 318
 319         if (!vidx11_display)
 320                 return;
 321
 322         while (XPending(vidx11_display))
 323         {
 324                 XNextEvent(vidx11_display, &event);
 325
 326                 switch (event.type)
 327                 {
 328                 case KeyPress:
 329                         // key pressed
 330                         Key_Event(XLateKey(&event.xkey), true);
 331                         break;
 332
 333                 case KeyRelease:
 334                         // key released
 335                         Key_Event(XLateKey(&event.xkey), false);
 336                         break;
 337
 338                 case MotionNotify:
 339                         // mouse moved
 340                         if (usingmouse)
 341                         {
 342                                 if (vid_dga.integer == 1)
 343                                 {
 344                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 345                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 346                                 }
 347                                 else
 348                                 {
 349
 350                                         if (!event.xmotion.send_event)
 351                                         {
 352                                                 mouse_x += event.xmotion.x - p_mouse_x;
 353                                                 mouse_y += event.xmotion.y - p_mouse_y;
 354                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 355                                                         dowarp = true;
 356                                         }
 357                                         p_mouse_x = event.xmotion.x;
 358                                         p_mouse_y = event.xmotion.y;
 359                                 }
 360                         }
 361                         else
 362                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 363                         break;
 364
 365                 case ButtonPress:
 366                         // mouse button pressed
 367                         switch(event.xbutton.button)
 368                         {
 369                         case 1:
 370                                 Key_Event(K_MOUSE1, true);
 371                                 break;
 372                         case 2:
 373                                 Key_Event(K_MOUSE3, true);
 374                                 break;
 375                         case 3:
 376                                 Key_Event(K_MOUSE2, true);
 377                                 break;
 378                         case 4:
 379                                 Key_Event(K_MWHEELUP, true);
 380                                 break;
 381                         case 5:
 382                                 Key_Event(K_MWHEELDOWN, true);
 383                                 break;
 384                 default:
 385                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-5 expected\n", event.xbutton.button);
 386                                 break;
 387                         }
 388                         break;
 389
 390                 case ButtonRelease:
 391                         // mouse button released
 392                         switch(event.xbutton.button)
 393                         {
 394                         case 1:
 395                                 Key_Event(K_MOUSE1, false);
 396                                 break;
 397                         case 2:
 398                                 Key_Event(K_MOUSE3, false);
 399                                 break;
 400                         case 3:
 401                                 Key_Event(K_MOUSE2, false);
 402                                 break;
 403                         case 4:
 404                                 Key_Event(K_MWHEELUP, false);
 405                                 break;
 406                         case 5:
 407                                 Key_Event(K_MWHEELDOWN, false);
 408                                 break;
 409                 default:
 410                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-5 expected\n", event.xbutton.button);
 411                                 break;
 412                         }
 413                         break;
 414
 415                 case CreateNotify:
 416                         // window created
 417                         win_x = event.xcreatewindow.x;
 418                         win_y = event.xcreatewindow.y;
 419                         break;
 420
 421                 case ConfigureNotify:
 422                         // window changed size/location
 423                         win_x = event.xconfigure.x;
 424                         win_y = event.xconfigure.y;
 425                         break;
 426                 case DestroyNotify:
 427                         // window has been destroyed
 428                         Sys_Quit();
 429                         break;
 430                 case ClientMessage:
 431                         // window manager messages
 432                         if ((event.xclient.format == 32) && (event.xclient.data.l[0] == wm_delete_window_atom))
 433                                 Sys_Quit();
 434                         break;
 435                 case MapNotify:
 436                         // window restored
 437                         vid_hidden = false;
 438                         break;
 439                 case UnmapNotify:
 440                         // window iconified/rolledup/whatever
 441                         vid_hidden = true;
 442                         break;
 443                 case FocusIn:
 444                         // window is now the input focus
 445                         break;
 446                 case FocusOut:
 447                         // window is no longer the input focus
 448                         break;
 449                 case EnterNotify:
 450                         // mouse entered window
 451                         break;
 452                 case LeaveNotify:
 453                         // mouse left window
 454                         break;
 455                 }
 456         }
 457
 458         if (dowarp)
 459         {
 460                 /* move the mouse to the window center again */
 461                 p_mouse_x = scr_width / 2;
 462                 p_mouse_y = scr_height / 2;
 463                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 464         }
 465
 466 }
 467
 468 static void IN_DeactivateMouse( void )
 469 {
 470         if (!mouse_avail || !vidx11_display || !win)
 471                 return;
 472
 473         if (mouse_active)
 474         {
 475                 uninstall_grabs();
 476                 mouse_active = false;
 477         }
 478 }
 479
 480 static void IN_ActivateMouse( void )
 481 {
 482         if (!mouse_avail || !vidx11_display || !win)
 483                 return;
 484
 485         if (!mouse_active)
 486         {
 487                 mouse_x = mouse_y = 0; // don't spazz
 488                 install_grabs();
 489                 mouse_active = true;
 490         }
 491 }
 492
 493
 494 void VID_Shutdown(void)
 495 {
 496         if (!ctx || !vidx11_display)
 497                 return;
 498
 499         vid_hidden = true;
 500         usingmouse = false;
 501         if (vidx11_display)
 502         {
 503                 uninstall_grabs();
 504
 505                 // FIXME: glXDestroyContext here?
 506                 if (vidmode_active)
 507                         XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[0]);
 508                 if (win)
 509                         XDestroyWindow(vidx11_display, win);
 510                 XCloseDisplay(vidx11_display);
 511         }
 512         vidmode_active = false;
 513         vidx11_display = NULL;
 514         win = 0;
 515         ctx = NULL;
 516
 517         GL_CloseLibrary();
 518 }
 519
 520 void signal_handler(int sig)
 521 {
 522         printf("Received signal %d, exiting...\n", sig);
 523         Sys_Quit();
 524         exit(0);
 525 }
 526
 527 void InitSig(void)
 528 {
 529         signal(SIGHUP, signal_handler);
 530         signal(SIGINT, signal_handler);
 531         signal(SIGQUIT, signal_handler);
 532         signal(SIGILL, signal_handler);
 533         signal(SIGTRAP, signal_handler);
 534         signal(SIGIOT, signal_handler);
 535         signal(SIGBUS, signal_handler);
 536         signal(SIGFPE, signal_handler);
 537         signal(SIGSEGV, signal_handler);
 538         signal(SIGTERM, signal_handler);
 539 }
 540
 541 /*
 542 =================
 543 VID_GetWindowSize
 544 =================
 545 */
 546 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 547 {
 548         *x = *y = 0;
 549         *width = scr_width;
 550         *height = scr_height;
 551 }
 552
 553 void VID_Finish (void)
 554 {
 555         int usemouse;
 556         if (r_render.integer)
 557         {
 558                 qglFinish();
 559                 qglXSwapBuffers(vidx11_display, win);
 560         }
 561
 562 // handle the mouse state when windowed if that's changed
 563         usemouse = false;
 564         if (vid_mouse.integer && !key_consoleactive)
 565                 usemouse = true;
 566         if (vidmode_active)
 567                 usemouse = true;
 568         if (usemouse)
 569         {
 570                 if (!usingmouse)
 571                 {
 572                         usingmouse = true;
 573                         IN_ActivateMouse ();
 574                 }
 575         }
 576         else
 577         {
 578                 if (usingmouse)
 579                 {
 580                         usingmouse = false;
 581                         IN_DeactivateMouse ();
 582                 }
 583         }
 584 }
 585
 586 // LordHavoc: ported from SDL 1.2.2, this was far more difficult to port from
 587 // SDL than to simply use the XFree gamma ramp extension, but that affects the
 588 // whole screen even when the game window is inactive, this only affects the
 589 // screen while the window is active, very desirable behavior :)
 590 int VID_SetGamma(float prescale, float gamma, float scale, float base)
 591 {
 592 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
 593 #if 1
 594         return FALSE;
 595 #else
 596         int i, ncolors, c;
 597         unsigned int Rmask, Gmask, Bmask, Rloss, Gloss, Bloss, Rshift, Gshift, Bshift, mask;
 598         XColor xcmap[256];
 599         unsigned short ramp[256];
 600
 601         if (COM_CheckParm("-nogamma"))
 602                 return FALSE;
 603
 604         if (vidx11_visual->class != DirectColor)
 605         {
 606                 Con_Printf("X11 Visual class is %d, can only do gamma on %d\n", vidx11_visual->class, DirectColor);
 607                 return FALSE;
 608         }
 609
 610         Rmask = vidx11_visual->red_mask;
 611         Gmask = vidx11_visual->green_mask;
 612         Bmask = vidx11_visual->blue_mask;
 613
 614         Rshift = 0;
 615         Rloss = 8;
 616         if ((mask = Rmask))
 617         {
 618                 for (;!(mask & 1);mask >>= 1)
 619                         ++Rshift;
 620                 for (;(mask & 1);mask >>= 1)
 621                         --Rloss;
 622         }
 623         Gshift = 0;
 624         Gloss = 8;
 625         if ((mask = Gmask))
 626         {
 627                 for (;!(mask & 1);mask >>= 1)
 628                         ++Gshift;
 629                 for (;(mask & 1);mask >>= 1)
 630                         --Gloss;
 631         }
 632         Bshift = 0;
 633         Bloss = 8;
 634         if ((mask = Bmask))
 635         {
 636                 for (;!(mask & 1);mask >>= 1)
 637                         ++Bshift;
 638                 for (;(mask & 1);mask >>= 1)
 639                         --Bloss;
 640         }
 641
 642         BuildGammaTable16(prescale, gamma, scale, base, ramp);
 643
 644         // convert gamma ramp to palette (yes this seems odd)
 645         ncolors = vidx11_visual->map_entries;
 646         for (i = 0;i < ncolors;i++)
 647         {
 648                 c = (256 * i / ncolors);
 649                 xcmap[i].pixel = ((c >> Rloss) << Rshift) | ((c >> Gloss) << Gshift) | ((c >> Bloss) << Bshift);
 650                 xcmap[i].red   = ramp[c];
 651                 xcmap[i].green = ramp[c];
 652                 xcmap[i].blue  = ramp[c];
 653                 xcmap[i].flags = (DoRed|DoGreen|DoBlue);
 654         }
 655         XStoreColors(vidx11_display, vidx11_colormap, xcmap, ncolors);
 656         XSync(vidx11_display, false);
 657         // FIXME: should this check for BadAccess/BadColor/BadValue errors produced by XStoreColors before setting this true?
 658         return TRUE;
 659 #endif
 660 }
 661
 662 void VID_Init(void)
 663 {
 664         Cvar_RegisterVariable (&vid_dga);
 665         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 666         InitSig(); // trap evil signals
 667         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 668                 mouse_avail = false;
 669 }
 670
 671 void VID_BuildGLXAttrib(int *attrib, int stencil, int gamma)
 672 {
 673         *attrib++ = GLX_RGBA;
 674         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 675         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 676         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 677         *attrib++ = GLX_DOUBLEBUFFER;
 678         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 679         // if stencil is enabled, ask for alpha too
 680         if (stencil)
 681         {
 682                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 683                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 684         }
 685         if (gamma)
 686         {
 687                 *attrib++ = GLX_X_VISUAL_TYPE;*attrib++ = GLX_DIRECT_COLOR;
 688         };
 689         *attrib++ = None;
 690 }
 691
 692 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
 693 {
 694         int i;
 695         int attrib[32];
 696         XSetWindowAttributes attr;
 697         unsigned long mask;
 698         Window root;
 699         XVisualInfo *visinfo;
 700         int MajorVersion, MinorVersion;
 701         const char *drivername;
 702
 703         drivername = "libGL.so.1";
 704         i = COM_CheckParm("-gl_driver");
 705         if (i && i < com_argc - 1)
 706                 drivername = com_argv[i + 1];
 707         if (!GL_OpenLibrary(drivername))
 708         {
 709                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 710                 return false;
 711         }
 712
 713         if (!(vidx11_display = XOpenDisplay(NULL)))
 714         {
 715                 Con_Printf("Couldn't open the X display\n");
 716                 return false;
 717         }
 718
 719         scrnum = DefaultScreen(vidx11_display);
 720         root = RootWindow(vidx11_display, scrnum);
 721
 722         // Get video mode list
 723         MajorVersion = MinorVersion = 0;
 724         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 725                 vidmode_ext = false;
 726         else
 727         {
 728                 Con_Printf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 729                 vidmode_ext = true;
 730         }
 731
 732         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 733          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 734          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 735          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 736          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 737         {
 738                 Con_Printf("glX functions not found in %s\n", gl_driver);
 739                 return false;
 740         }
 741
 742         visinfo = NULL;
 743 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
 744 #if 0
 745         if (!COM_CheckParm("-nogamma"))
 746         {
 747                 VID_BuildGLXAttrib(attrib, stencil, true);
 748                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
 749         }
 750 #endif
 751         if (!visinfo)
 752         {
 753                 VID_BuildGLXAttrib(attrib, stencil, false);
 754                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
 755                 if (!visinfo)
 756                 {
 757                         Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
 758                         return false;
 759                 }
 760         }
 761
 762         if (vidmode_ext)
 763         {
 764                 int best_fit, best_dist, dist, x, y;
 765
 766                 XF86VidModeGetAllModeLines(vidx11_display, scrnum, &num_vidmodes, &vidmodes);
 767
 768                 // Are we going fullscreen?  If so, let's change video mode
 769                 if (fullscreen)
 770                 {
 771                         best_dist = 9999999;
 772                         best_fit = -1;
 773
 774                         for (i = 0; i < num_vidmodes; i++)
 775                         {
 776                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 777                                         continue;
 778
 779                                 x = width - vidmodes[i]->hdisplay;
 780                                 y = height - vidmodes[i]->vdisplay;
 781                                 dist = (x * x) + (y * y);
 782                                 if (dist < best_dist)
 783                                 {
 784                                         best_dist = dist;
 785                                         best_fit = i;
 786                                 }
 787                         }
 788
 789                         if (best_fit != -1)
 790                         {
 791                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 792                                 // to width/height =, so the window will take the full area of
 793                                 // the mode chosen
 794                                 width = vidmodes[best_fit]->hdisplay;
 795                                 height = vidmodes[best_fit]->vdisplay;
 796
 797                                 // change to the mode
 798                                 XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[best_fit]);
 799                                 vidmode_active = true;
 800
 801                                 // Move the viewport to top left
 802                                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
 803                         }
 804                         else
 805                                 fullscreen = 0;
 806                 }
 807         }
 808
 809         // LordHavoc: save the visual for use in gamma ramp settings later
 810         vidx11_visual = visinfo->visual;
 811
 812         /* window attributes */
 813         attr.background_pixel = 0;
 814         attr.border_pixel = 0;
 815         // LordHavoc: save the colormap for later, too
 816         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 817         attr.event_mask = X_MASK;
 818         if (vidmode_active)
 819         {
 820                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 821                 attr.override_redirect = True;
 822                 attr.backing_store = NotUseful;
 823                 attr.save_under = False;
 824         }
 825         else
 826                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 827
 828         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 829         XStoreName(vidx11_display, win, gamename);
 830         XMapWindow(vidx11_display, win);
 831
 832         // LordHavoc: making the close button on a window do the right thing
 833         // seems to involve this mess, sigh...
 834         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 835         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 836
 837         if (vidmode_active)
 838         {
 839                 XMoveWindow(vidx11_display, win, 0, 0);
 840                 XRaiseWindow(vidx11_display, win);
 841                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 842                 XFlush(vidx11_display);
 843                 // Move the viewport to top left
 844                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
 845         }
 846
 847         //XSync(vidx11_display, False);
 848
 849         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 850         if (!ctx)
 851                 Sys_Error ("glXCreateContext failed\n");
 852
 853         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 854                 Sys_Error ("glXMakeCurrent failed\n");
 855
 856         XSync(vidx11_display, False);
 857
 858         scr_width = width;
 859         scr_height = height;
 860
 861         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 862                 Sys_Error("glGetString not found in %s", gl_driver);
 863
 864         gl_renderer = qglGetString(GL_RENDERER);
 865         gl_vendor = qglGetString(GL_VENDOR);
 866         gl_version = qglGetString(GL_VERSION);
 867         gl_extensions = qglGetString(GL_EXTENSIONS);
 868         gl_platform = "GLX";
 869         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, scrnum);
 870
 871         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 872         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
 873
 874         usingmouse = false;
 875         vid_hidden = false;
 876         GL_Init();
 877         return true;
 878 }
 879
 880 void Sys_SendKeyEvents(void)
 881 {
 882         HandleEvents();
 883 }
 884
 885 /*
 886 ===========
 887 IN_Commands
 888 ===========
 889 */
 890 void IN_Commands (void)
 891 {
 892 }
 893
 894 void IN_Move (usercmd_t *cmd)
 895 {
 896         if (mouse_avail)
 897                 IN_Mouse(cmd, mouse_x, mouse_y);
 898         mouse_x = 0;
 899         mouse_y = 0;
 900 }
 901
 902 static void *prjobj = NULL;
 903
 904 int GL_OpenLibrary(const char *name)
 905 {
 906         Con_Printf("Loading GL driver %s\n", name);
 907         GL_CloseLibrary();
 908         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 909         {
 910                 Con_Printf("Unable to open symbol list for %s\n", name);
 911                 return false;
 912         }
 913         strcpy(gl_driver, name);
 914         return true;
 915 }
 916
 917 void GL_CloseLibrary(void)
 918 {
 919         if (prjobj)
 920                 dlclose(prjobj);
 921         prjobj = NULL;
 922         gl_driver[0] = 0;
 923         qglXGetProcAddressARB = NULL;
 924         gl_extensions = "";
 925         gl_platform = "";
 926         gl_platformextensions = "";
 927 }
 928
 929 void *GL_GetProcAddress(const char *name)
 930 {
 931         void *p = NULL;
 932         if (qglXGetProcAddressARB != NULL)
 933                 p = (void *) qglXGetProcAddressARB(name);
 934         if (p == NULL)
 935                 p = (void *) dlsym(prjobj, name);
 936         return p;
 937 }