6ccbbc2ab4cde55d7bef491951a9ec1c88c62472
[xonotic/darkplaces.git] / 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 gl_extensionfunctionlist_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 gl_extensionfunctionlist_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
110 XLateKey(XKeyEvent *ev)
111 {
112         int key = 0;
113         KeySym keysym;
114
115         keysym = XLookupKeysym(ev, 0);
116
117         switch(keysym)
118         {
119                 case XK_KP_Page_Up:     key = KP_PGUP; break;
120                 case XK_Page_Up:        key = K_PGUP; break;
121
122                 case XK_KP_Page_Down:   key = KP_PGDN; break;
123                 case XK_Page_Down:      key = K_PGDN; break;
124
125                 case XK_KP_Home:        key = KP_HOME; break;
126                 case XK_Home:           key = K_HOME; break;
127
128                 case XK_KP_End:         key = KP_END; break;
129                 case XK_End:            key = K_END; break;
130
131                 case XK_KP_Left:        key = KP_LEFTARROW; break;
132                 case XK_Left:           key = K_LEFTARROW; break;
133
134                 case XK_KP_Right:       key = KP_RIGHTARROW; break;
135                 case XK_Right:          key = K_RIGHTARROW; break;
136
137                 case XK_KP_Down:        key = KP_DOWNARROW; break;
138                 case XK_Down:           key = K_DOWNARROW; break;
139
140                 case XK_KP_Up:          key = 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 = 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                 case XK_F2:                     key = K_F2; break;
152                 case XK_F3:                     key = K_F3; break;
153                 case XK_F4:                     key = K_F4; break;
154                 case XK_F5:                     key = K_F5; break;
155                 case XK_F6:                     key = K_F6; break;
156                 case XK_F7:                     key = K_F7; break;
157                 case XK_F8:                     key = K_F8; break;
158                 case XK_F9:                     key = K_F9; break;
159                 case XK_F10:            key = K_F10; break;
160                 case XK_F11:            key = K_F11; break;
161                 case XK_F12:            key = K_F12; break;
162
163                 case XK_BackSpace:      key = K_BACKSPACE; break;
164
165                 case XK_KP_Delete:      key = KP_DEL; break;
166                 case XK_Delete:         key = K_DEL; break;
167
168                 case XK_Pause:          key = K_PAUSE; break;
169
170                 case XK_Shift_L:
171                 case XK_Shift_R:        key = K_SHIFT; break;
172
173                 case XK_Execute:
174                 case XK_Control_L:
175                 case XK_Control_R:      key = K_CTRL; break;
176
177                 case XK_Mode_switch:
178                 case XK_Alt_L:
179                 case XK_Meta_L:
180                 case XK_Alt_R:
181                 case XK_Meta_R:         key = K_ALT; break;
182
183                 case XK_Caps_Lock:      key = K_CAPSLOCK; break;
184                 case XK_KP_Begin:       key = KP_5; break;
185
186                 case XK_Insert:         key = K_INS; break;
187                 case XK_KP_Insert:      key = KP_INS; break;
188
189                 case XK_KP_Multiply:    key = KP_MULTIPLY; break;
190                 case XK_KP_Add:         key = KP_PLUS; break;
191                 case XK_KP_Subtract:    key = KP_MINUS; break;
192                 case XK_KP_Divide:      key = KP_DIVIDE; break;
193
194                 /* For Sun keyboards */
195                 case XK_F27:            key = K_HOME; break;
196                 case XK_F29:            key = K_PGUP; break;
197                 case XK_F33:            key = K_END; break;
198                 case XK_F35:            key = K_PGDN; break;
199
200                 default:
201                         if (keysym < 128)
202                         {
203                                 /* ASCII keys */
204                                 key = keysym;
205                                 if ((key >= 'A') && (key <= 'Z'))
206                                         key = key + ('a' - 'A');
207                         }
208                         break;
209         }
210
211         return key;
212 }
213
214 static Cursor CreateNullCursor(Display *display, Window root)
215 {
216         Pixmap cursormask;
217         XGCValues xgc;
218         GC gc;
219         XColor dummycolour;
220         Cursor cursor;
221
222         cursormask = XCreatePixmap(display, root, 1, 1, 1);
223         xgc.function = GXclear;
224         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
225         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
226         dummycolour.pixel = 0;
227         dummycolour.red = 0;
228         dummycolour.flags = 04;
229         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
230         XFreePixmap(display,cursormask);
231         XFreeGC(display,gc);
232         return cursor;
233 }
234
235 static void install_grabs(void)
236 {
237         XWindowAttributes attribs_1;
238         XSetWindowAttributes attribs_2;
239
240         XGetWindowAttributes(vidx11_display, win, &attribs_1);
241         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
242         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
243
244 // inviso cursor
245         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
246
247         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
248
249         if (vid_dga.integer)
250         {
251                 int MajorVersion, MinorVersion;
252
253                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
254                 {
255                         // unable to query, probalby not supported
256                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
257                         vid_dga.integer = 0;
258                 }
259                 else
260                 {
261                         vid_dga.integer = 1;
262                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
263                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
264                 }
265         }
266         else
267                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
268
269         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
270
271         mouse_active = true;
272         mouse_x = mouse_y = 0;
273 }
274
275 static void uninstall_grabs(void)
276 {
277         if (!vidx11_display || !win)
278                 return;
279
280         if (vid_dga.integer == 1)
281                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
282
283         XUngrabPointer(vidx11_display, CurrentTime);
284         XUngrabKeyboard(vidx11_display, CurrentTime);
285
286 // inviso cursor
287         XUndefineCursor(vidx11_display, win);
288
289         mouse_active = false;
290 }
291
292 static void HandleEvents(void)
293 {
294         XEvent event;
295         qboolean dowarp = false;
296
297         if (!vidx11_display)
298                 return;
299
300         while (XPending(vidx11_display))
301         {
302                 XNextEvent(vidx11_display, &event);
303
304                 switch (event.type)
305                 {
306                 case KeyPress:
307                         // key pressed
308                         Key_Event(XLateKey(&event.xkey), true);
309                         break;
310
311                 case KeyRelease:
312                         // key released
313                         Key_Event(XLateKey(&event.xkey), false);
314                         break;
315
316                 case MotionNotify:
317                         // mouse moved
318                         if (usingmouse)
319                         {
320                                 if (vid_dga.integer == 1)
321                                 {
322                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
323                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
324                                 }
325                                 else
326                                 {
327
328                                         if (!event.xmotion.send_event)
329                                         {
330                                                 mouse_x += event.xmotion.x - p_mouse_x;
331                                                 mouse_y += event.xmotion.y - p_mouse_y;
332                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
333                                                         dowarp = true;
334                                         }
335                                         p_mouse_x = event.xmotion.x;
336                                         p_mouse_y = event.xmotion.y;
337                                 }
338                         }
339                         else
340                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
341                         break;
342
343                 case ButtonPress:
344                         // mouse button pressed
345                         switch(event.xbutton.button)
346                         {
347                         case 1:
348                                 Key_Event(K_MOUSE1, true);
349                                 break;
350                         case 2:
351                                 Key_Event(K_MOUSE3, true);
352                                 break;
353                         case 3:
354                                 Key_Event(K_MOUSE2, true);
355                                 break;
356                         case 4:
357                                 Key_Event(K_MWHEELUP, true);
358                                 break;
359                         case 5:
360                                 Key_Event(K_MWHEELDOWN, true);
361                                 break;
362                 default:
363                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-5 expected\n", event.xbutton.button);
364                                 break;
365                         }
366                         break;
367
368                 case ButtonRelease:
369                         // mouse button released
370                         switch(event.xbutton.button)
371                         {
372                         case 1:
373                                 Key_Event(K_MOUSE1, false);
374                                 break;
375                         case 2:
376                                 Key_Event(K_MOUSE3, false);
377                                 break;
378                         case 3:
379                                 Key_Event(K_MOUSE2, false);
380                                 break;
381                         case 4:
382                                 Key_Event(K_MWHEELUP, false);
383                                 break;
384                         case 5:
385                                 Key_Event(K_MWHEELDOWN, false);
386                                 break;
387                 default:
388                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-5 expected\n", event.xbutton.button);
389                                 break;
390                         }
391                         break;
392
393                 case CreateNotify:
394                         // window created
395                         win_x = event.xcreatewindow.x;
396                         win_y = event.xcreatewindow.y;
397                         break;
398
399                 case ConfigureNotify:
400                         // window changed size/location
401                         win_x = event.xconfigure.x;
402                         win_y = event.xconfigure.y;
403                         break;
404                 case DestroyNotify:
405                         // window has been destroyed
406                         Sys_Quit();
407                         break;
408                 case ClientMessage:
409                         // window manager messages
410                         if ((event.xclient.format == 32) && (event.xclient.data.l[0] == wm_delete_window_atom))
411                                 Sys_Quit();
412                         break;
413                 case MapNotify:
414                         // window restored
415                         vid_hidden = false;
416                         break;
417                 case UnmapNotify:
418                         // window iconified/rolledup/whatever
419                         vid_hidden = true;
420                         break;
421                 case FocusIn:
422                         // window is now the input focus
423                         break;
424                 case FocusOut:
425                         // window is no longer the input focus
426                         break;
427                 case EnterNotify:
428                         // mouse entered window
429                         break;
430                 case LeaveNotify:
431                         // mouse left window
432                         break;
433                 }
434         }
435
436         if (dowarp)
437         {
438                 /* move the mouse to the window center again */
439                 p_mouse_x = scr_width / 2;
440                 p_mouse_y = scr_height / 2;
441                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
442         }
443
444 }
445
446 static void IN_DeactivateMouse( void )
447 {
448         if (!mouse_avail || !vidx11_display || !win)
449                 return;
450
451         if (mouse_active)
452         {
453                 uninstall_grabs();
454                 mouse_active = false;
455         }
456 }
457
458 static void IN_ActivateMouse( void )
459 {
460         if (!mouse_avail || !vidx11_display || !win)
461                 return;
462
463         if (!mouse_active)
464         {
465                 mouse_x = mouse_y = 0; // don't spazz
466                 install_grabs();
467                 mouse_active = true;
468         }
469 }
470
471
472 void VID_Shutdown(void)
473 {
474         if (!ctx || !vidx11_display)
475                 return;
476
477         vid_hidden = true;
478         usingmouse = false;
479         if (vidx11_display)
480         {
481                 uninstall_grabs();
482
483                 if (vidmode_active)
484                         XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[0]);
485                 if (win)
486                         XDestroyWindow(vidx11_display, win);
487                 XCloseDisplay(vidx11_display);
488         }
489         vidmode_active = false;
490         vidx11_display = NULL;
491         win = 0;
492         ctx = NULL;
493
494         GL_CloseLibrary();
495 }
496
497 void signal_handler(int sig)
498 {
499         printf("Received signal %d, exiting...\n", sig);
500         Sys_Quit();
501         exit(0);
502 }
503
504 void InitSig(void)
505 {
506         signal(SIGHUP, signal_handler);
507         signal(SIGINT, signal_handler);
508         signal(SIGQUIT, signal_handler);
509         signal(SIGILL, signal_handler);
510         signal(SIGTRAP, signal_handler);
511         signal(SIGIOT, signal_handler);
512         signal(SIGBUS, signal_handler);
513         signal(SIGFPE, signal_handler);
514         signal(SIGSEGV, signal_handler);
515         signal(SIGTERM, signal_handler);
516 }
517
518 /*
519 =================
520 VID_GetWindowSize
521 =================
522 */
523 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
524 {
525         *x = *y = 0;
526         *width = scr_width;
527         *height = scr_height;
528 }
529
530 void VID_Finish (void)
531 {
532         int usemouse;
533         if (r_render.integer)
534         {
535                 qglFinish();
536                 qglXSwapBuffers(vidx11_display, win);
537         }
538
539 // handle the mouse state when windowed if that's changed
540         usemouse = false;
541         if (vid_mouse.integer && !key_consoleactive)
542                 usemouse = true;
543         if (vidmode_active)
544                 usemouse = true;
545         if (usemouse)
546         {
547                 if (!usingmouse)
548                 {
549                         usingmouse = true;
550                         IN_ActivateMouse ();
551                 }
552         }
553         else
554         {
555                 if (usingmouse)
556                 {
557                         usingmouse = false;
558                         IN_DeactivateMouse ();
559                 }
560         }
561 }
562
563 // LordHavoc: ported from SDL 1.2.2, this was far more difficult to port from
564 // SDL than to simply use the XFree gamma ramp extension, but that affects the
565 // whole screen even when the game window is inactive, this only affects the
566 // screen while the window is active, very desirable behavior :)
567 int VID_SetGamma(float prescale, float gamma, float scale, float base)
568 {
569 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
570 #if 1
571         return FALSE;
572 #else
573         int i, ncolors, c;
574         unsigned int Rmask, Gmask, Bmask, Rloss, Gloss, Bloss, Rshift, Gshift, Bshift, mask;
575         XColor xcmap[256];
576         unsigned short ramp[256];
577
578         if (COM_CheckParm("-nogamma"))
579                 return FALSE;
580
581         if (vidx11_visual->class != DirectColor)
582         {
583                 Con_Printf("X11 Visual class is %d, can only do gamma on %d\n", vidx11_visual->class, DirectColor);
584                 return FALSE;
585         }
586
587         Rmask = vidx11_visual->red_mask;
588         Gmask = vidx11_visual->green_mask;
589         Bmask = vidx11_visual->blue_mask;
590
591         Rshift = 0;
592         Rloss = 8;
593         if ((mask = Rmask))
594         {
595                 for (;!(mask & 1);mask >>= 1)
596                         ++Rshift;
597                 for (;(mask & 1);mask >>= 1)
598                         --Rloss;
599         }
600         Gshift = 0;
601         Gloss = 8;
602         if ((mask = Gmask))
603         {
604                 for (;!(mask & 1);mask >>= 1)
605                         ++Gshift;
606                 for (;(mask & 1);mask >>= 1)
607                         --Gloss;
608         }
609         Bshift = 0;
610         Bloss = 8;
611         if ((mask = Bmask))
612         {
613                 for (;!(mask & 1);mask >>= 1)
614                         ++Bshift;
615                 for (;(mask & 1);mask >>= 1)
616                         --Bloss;
617         }
618
619         BuildGammaTable16(prescale, gamma, scale, base, ramp);
620
621         // convert gamma ramp to palette (yes this seems odd)
622         ncolors = vidx11_visual->map_entries;
623         for (i = 0;i < ncolors;i++)
624         {
625                 c = (256 * i / ncolors);
626                 xcmap[i].pixel = ((c >> Rloss) << Rshift) | ((c >> Gloss) << Gshift) | ((c >> Bloss) << Bshift);
627                 xcmap[i].red   = ramp[c];
628                 xcmap[i].green = ramp[c];
629                 xcmap[i].blue  = ramp[c];
630                 xcmap[i].flags = (DoRed|DoGreen|DoBlue);
631         }
632         XStoreColors(vidx11_display, vidx11_colormap, xcmap, ncolors);
633         XSync(vidx11_display, false);
634         // FIXME: should this check for BadAccess/BadColor/BadValue errors produced by XStoreColors before setting this true?
635         return TRUE;
636 #endif
637 }
638
639 void VID_Init(void)
640 {
641         Cvar_RegisterVariable (&vid_dga);
642         Cvar_RegisterVariable (&vid_dga_mouseaccel);
643         InitSig(); // trap evil signals
644         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
645                 mouse_avail = false;
646 }
647
648 void VID_BuildGLXAttrib(int *attrib, int stencil, int gamma)
649 {
650         *attrib++ = GLX_RGBA;
651         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
652         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
653         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
654         *attrib++ = GLX_DOUBLEBUFFER;
655         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
656         if (stencil)
657         {
658                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
659         }
660         if (gamma)
661         {
662                 *attrib++ = GLX_X_VISUAL_TYPE;*attrib++ = GLX_DIRECT_COLOR;
663         };
664         *attrib++ = None;
665 }
666
667 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
668 {
669         int i;
670         int attrib[32];
671         XSetWindowAttributes attr;
672         unsigned long mask;
673         Window root;
674         XVisualInfo *visinfo;
675         int MajorVersion, MinorVersion;
676         
677         if (!GL_OpenLibrary("libGL.so.1"))
678         {
679                 Con_Printf("Unable to load GL driver\n");
680                 return false;
681         }
682
683         if (!(vidx11_display = XOpenDisplay(NULL)))
684         {
685                 Con_Printf("Couldn't open the X display\n");
686                 return false;
687         }
688
689         scrnum = DefaultScreen(vidx11_display);
690         root = RootWindow(vidx11_display, scrnum);
691
692         // Get video mode list
693         MajorVersion = MinorVersion = 0;
694         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
695                 vidmode_ext = false;
696         else
697         {
698                 Con_Printf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
699                 vidmode_ext = true;
700         }
701
702         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
703          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
704          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
705          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
706          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
707         {
708                 Con_Printf("glX functions not found in %s\n", gl_driver);
709                 return false;
710         }
711
712         visinfo = NULL;
713 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
714 #if 0
715         if (!COM_CheckParm("-nogamma"))
716         {
717                 VID_BuildGLXAttrib(attrib, stencil, true);
718                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
719         }
720 #endif
721         if (!visinfo)
722         {
723                 VID_BuildGLXAttrib(attrib, stencil, false);
724                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
725                 if (!visinfo)
726                 {
727                         Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
728                         return false;
729                 }
730         }
731
732         if (vidmode_ext)
733         {
734                 int best_fit, best_dist, dist, x, y;
735
736                 XF86VidModeGetAllModeLines(vidx11_display, scrnum, &num_vidmodes, &vidmodes);
737
738                 // Are we going fullscreen?  If so, let's change video mode
739                 if (fullscreen)
740                 {
741                         best_dist = 9999999;
742                         best_fit = -1;
743
744                         for (i = 0; i < num_vidmodes; i++)
745                         {
746                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
747                                         continue;
748
749                                 x = width - vidmodes[i]->hdisplay;
750                                 y = height - vidmodes[i]->vdisplay;
751                                 dist = (x * x) + (y * y);
752                                 if (dist < best_dist)
753                                 {
754                                         best_dist = dist;
755                                         best_fit = i;
756                                 }
757                         }
758
759                         if (best_fit != -1)
760                         {
761                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
762                                 // to width/height =, so the window will take the full area of
763                                 // the mode chosen
764                                 width = vidmodes[best_fit]->hdisplay;
765                                 height = vidmodes[best_fit]->vdisplay;
766
767                                 // change to the mode
768                                 XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[best_fit]);
769                                 vidmode_active = true;
770
771                                 // Move the viewport to top left
772                                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
773                         }
774                         else
775                                 fullscreen = 0;
776                 }
777         }
778
779         // LordHavoc: save the visual for use in gamma ramp settings later
780         vidx11_visual = visinfo->visual;
781
782         /* window attributes */
783         attr.background_pixel = 0;
784         attr.border_pixel = 0;
785         // LordHavoc: save the colormap for later, too
786         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
787         attr.event_mask = X_MASK;
788         if (vidmode_active)
789         {
790                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
791                 attr.override_redirect = True;
792                 attr.backing_store = NotUseful;
793                 attr.save_under = False;
794         }
795         else
796                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
797
798         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
799         XStoreName(vidx11_display, win, gamename);
800         XMapWindow(vidx11_display, win);
801
802         // LordHavoc: making the close button on a window do the right thing
803         // seems to involve this mess, sigh...
804         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
805         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
806
807         if (vidmode_active)
808         {
809                 XMoveWindow(vidx11_display, win, 0, 0);
810                 XRaiseWindow(vidx11_display, win);
811                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
812                 XFlush(vidx11_display);
813                 // Move the viewport to top left
814                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
815         }
816
817         XFlush(vidx11_display);
818
819         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
820
821         qglXMakeCurrent(vidx11_display, win, ctx);
822
823         scr_width = width;
824         scr_height = height;
825
826         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
827                 Sys_Error("glGetString not found in %s", gl_driver);
828
829         gl_renderer = qglGetString(GL_RENDERER);
830         gl_vendor = qglGetString(GL_VENDOR);
831         gl_version = qglGetString(GL_VERSION);
832         gl_extensions = qglGetString(GL_EXTENSIONS);
833         gl_platform = "GLX";
834         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, scrnum);
835
836         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
837         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
838
839         usingmouse = false;
840         vid_hidden = false;
841         GL_Init();
842         return true;
843 }
844
845 void Sys_SendKeyEvents(void)
846 {
847         HandleEvents();
848 }
849
850 /*
851 ===========
852 IN_Commands
853 ===========
854 */
855 void IN_Commands (void)
856 {
857 }
858
859 void IN_Move (usercmd_t *cmd)
860 {
861         if (mouse_avail)
862                 IN_Mouse(cmd, mouse_x, mouse_y);
863         mouse_x = 0;
864         mouse_y = 0;
865 }
866
867 static void *prjobj = NULL;
868
869 int GL_OpenLibrary(const char *name)
870 {
871         Con_Printf("Loading GL driver %s\n", name);
872         GL_CloseLibrary();
873         if (!(prjobj = dlopen(name, RTLD_LAZY)))
874         {
875                 Con_Printf("Unable to open symbol list for %s\n", name);
876                 return false;
877         }
878         strcpy(gl_driver, name);
879         return true;
880 }
881
882 void GL_CloseLibrary(void)
883 {
884         if (prjobj)
885                 dlclose(prjobj);
886         prjobj = NULL;
887         gl_driver[0] = 0;
888         qglXGetProcAddressARB = NULL;
889         gl_extensions = "";
890         gl_platform = "";
891         gl_platformextensions = "";
892 }
893
894 void *GL_GetProcAddress(const char *name)
895 {
896         void *p = NULL;
897         if (qglXGetProcAddressARB != NULL)
898                 p = (void *) qglXGetProcAddressARB(name);
899         if (p == NULL)
900                 p = (void *) dlsym(prjobj, name);
901         return p;
902 }