/* $Id: gl_glx.c,v 1.18 2003/01/09 12:06:13 jaq Exp $
 *
 * Copyright (C) 1997-2001 Id Software, Inc.
 * Copyright (c) 2002 The Quakeforge Project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * 
 * See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/*
** GLW_IMP.C
**
** This file contains ALL Linux specific stuff having to do with the
** OpenGL refresh.  When a port is being made the following functions
** must be implemented by the port:
**
** GLimp_EndFrame
** GLimp_Init
** GLimp_Shutdown
** GLimp_SwitchFullscreen
**
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <termios.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
/* #include <sys/vt.h> */
#include <stdarg.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

#ifdef HAVE_DLOPEN
# include <dlfcn.h>
#endif

#include "gl_local.h"

#include "keys.h"

#include "rw.h"
#include "glw.h"

#include <GL/glx.h>

#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/cursorfont.h>

#ifdef HAVE_XF86_DGA
#include <X11/extensions/xf86dga.h>
#endif // HAVE_XF86_DGA
#ifdef HAVE_XF86_VIDMODE
#include <X11/extensions/xf86vmode.h>
#endif // HAVE_XF86_VIDMODE

#ifdef HAVE_JOYSTICK
#include <sys/types.h>
#include <fcntl.h>
#include <linux/joystick.h>
#include <glob.h>
#endif

glwstate_t glw_state;

static Display *dpy = NULL;
static int scrnum;
static Window win;
static GLXContext ctx = NULL;
static Atom wmDeleteWindow;
static int window_width;
static int window_height;

#define KEY_MASK (KeyPressMask | KeyReleaseMask)
#define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
		    PointerMotionMask | ButtonMotionMask )
#define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | StructureNotifyMask )

// GLX Functions
static XVisualInfo * (*qglXChooseVisual)( Display *dpy, int screen, int *attribList );
static GLXContext (*qglXCreateContext)( Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct );
static void (*qglXDestroyContext)( Display *dpy, GLXContext ctx );
static Bool (*qglXMakeCurrent)( Display *dpy, GLXDrawable drawable, GLXContext ctx);
static void (*qglXCopyContext)( Display *dpy, GLXContext src, GLXContext dst, GLuint mask );
static void (*qglXSwapBuffers)( Display *dpy, GLXDrawable drawable );
static int (*qglXGetConfig)( Display *dpy, XVisualInfo *vis, int attrib, int *value);

/* JOYSTICK */
#ifdef HAVE_JOYSTICK
static cvar_t * in_joystick;
static qboolean joystick_avail = false;
static int joy_fd, jx, jy, jt;
static cvar_t * j_invert_y;

void init_joystick() {
    int i, err;
    glob_t pglob;
    struct js_event e;

    joystick_avail = false;
    err = glob("/dev/js*", 0, NULL, &pglob);
    if (err) {
	switch (err) {
	  case GLOB_NOSPACE:
	    ri.Con_Printf(PRINT_ALL, "Error, out of memory while looking for joysticks\n");
	    break;
	  case GLOB_NOMATCH:
	    ri.Con_Printf(PRINT_ALL, "No joysticks found\n");
	    break;
	  default:
	    ri.Con_Printf(PRINT_ALL, "Error %d while looking for joysticks\n", err);
	}
	return;
    }

    for (i = 0; i < pglob.gl_pathc; i++) {
	ri.Con_Printf(PRINT_ALL, "Trying joystick dev %s\n", pglob.gl_pathv[i]);
	joy_fd = open(pglob.gl_pathv[i], O_RDONLY | O_NONBLOCK);
	if (joy_fd == -1)
	    ri.Con_Printf(PRINT_ALL, "Error opening joystick dev %s\n", pglob.gl_pathv[i]);
	else {
	    while (read(joy_fd, &e, sizeof(struct js_event)) != -1 && (e.type &JS_EVENT_INIT))
		ri.Con_Printf(PRINT_ALL, "Read init event\n");
	    ri.Con_Printf(PRINT_ALL, "Using joystick dev %s\n", pglob.gl_pathv[i]);
	    joystick_avail = true;
	    return;
	}
    }
    globfree(&pglob);
}
#endif

#ifdef Joystick
static cvar_t   *in_joystick;
static qboolean joystick_avail = false;
static int joy_fd, jx, jy, jt;
static cvar_t   *j_invert_y;
#endif

#ifdef Joystick
void InitJoystick() {
  int i, err;
  glob_t pglob;
  struct js_event e;

  joystick_avail = false;
  err = glob("/dev/js*", 0, NULL, &pglob);
  
  if (err) {
    switch (err) {
    case GLOB_NOSPACE:
      ri.Con_Printf(PRINT_ALL, "Error, out of memory while looking for joysticks\n");
      break;
    case GLOB_NOMATCH:
      ri.Con_Printf(PRINT_ALL, "No joysticks found\n");
      break;
    default:
      ri.Con_Printf(PRINT_ALL, "Error #%d while looking for joysticks\n",err);
    }
    return;
  }  
  
  for (i=0;i<pglob.gl_pathc;i++) {
    ri.Con_Printf(PRINT_ALL, "Trying joystick dev %s\n", pglob.gl_pathv[i]);
    joy_fd = open (pglob.gl_pathv[i], O_RDONLY | O_NONBLOCK);
    if (joy_fd == -1) {
      ri.Con_Printf(PRINT_ALL, "Error opening joystick dev %s\n", 
		    pglob.gl_pathv[i]);
    }
    else {
      while (read(joy_fd, &e, sizeof(struct js_event))!=-1 &&
	     (e.type & JS_EVENT_INIT))
	ri.Con_Printf(PRINT_ALL, "Read init event\n");
      ri.Con_Printf(PRINT_ALL, "Using joystick dev %s\n", pglob.gl_pathv[i]);
      joystick_avail = true;
      return;
    }
  }
  globfree(&pglob);
}
#endif


/*****************************************************************************/
/* MOUSE                                                                     */
/*****************************************************************************/

// this is inside the renderer shared lib, so these are called from vid_so

static qboolean        mouse_avail;
static int mouse_buttonstate;
static int mouse_oldbuttonstate;
static int   mx, my;
static int	old_mouse_x, old_mouse_y;
static int old_windowed_mouse;

static int win_x, win_y;

static cvar_t	*_windowed_mouse;
static cvar_t	*m_filter;
static cvar_t	*in_mouse;
static cvar_t	*in_dgamouse;

static cvar_t	*r_fakeFullscreen;

#ifdef HAVE_XF86_VIDMODE
static XF86VidModeModeInfo **vidmodes;
#endif // HAVE_XF86_VIDMODE
//static int default_dotclock_vidmode;
static int num_vidmodes;
static qboolean vidmode_active = false;

/* hardware gamma */
#ifdef HAVE_XF86_VIDMODE
static XF86VidModeGamma oldgamma;
#endif // HAVE_XF86_VIDMODE

static qboolean	mlooking;

static qboolean mouse_active = false;
static qboolean dgamouse = false;
static qboolean vidmode_ext = false;

/* stencilbuffer shadows */
qboolean have_stencil = false;

// state struct passed in Init
static in_state_t	*in_state;

static cvar_t *sensitivity;
static cvar_t *lookstrafe;
static cvar_t *m_side;
static cvar_t *m_yaw;
static cvar_t *m_pitch;
static cvar_t *m_forward;
static cvar_t *freelook;

static Time myxtime;

static Cursor CreateNullCursor(Display *display, Window root)
{
    Pixmap cursormask; 
    XGCValues xgc;
    GC gc;
    XColor dummycolour;
    Cursor cursor;

    cursormask = XCreatePixmap(display, root, 1, 1, 1/*depth*/);
    xgc.function = GXclear;
    gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
    XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
    dummycolour.pixel = 0;
    dummycolour.red = 0;
    dummycolour.flags = 04;
    cursor = XCreatePixmapCursor(display, cursormask, cursormask,
          &dummycolour,&dummycolour, 0,0);
    XFreePixmap(display,cursormask);
    XFreeGC(display,gc);
    return cursor;
}

static void install_grabs(void)
{

// inviso cursor
	XDefineCursor(dpy, win, CreateNullCursor(dpy, win));

	XGrabPointer(dpy, win,
				 True,
				 0,
				 GrabModeAsync, GrabModeAsync,
				 win,
				 None,
				 CurrentTime);

#ifdef HAVE_XF86_DGA
	if (in_dgamouse->value) {
		int MajorVersion, MinorVersion;

		if (!XF86DGAQueryVersion(dpy, &MajorVersion, &MinorVersion)) { 
			// unable to query, probalby not supported
			ri.Con_Printf( PRINT_ALL, "Failed to detect XF86DGA Mouse\n" );
			ri.Cvar_Set( "in_dgamouse", "0" );
		} else {
			dgamouse = true;
			XF86DGADirectVideo(dpy, DefaultScreen(dpy), XF86DGADirectMouse);
			XWarpPointer(dpy, None, win, 0, 0, 0, 0, 0, 0);
		}
	} else
#endif // HAVE_XF86_DGA
	{
		XWarpPointer(dpy, None, win,
					 0, 0, 0, 0,
					 vid.width / 2, vid.height / 2);
	}

	XGrabKeyboard(dpy, win,
				  False,
				  GrabModeAsync, GrabModeAsync,
				  CurrentTime);

	mouse_active = true;

//	XSync(dpy, True);
}

static void uninstall_grabs(void)
{
	if (!dpy || !win)
		return;

#ifdef HAVE_XF86_DGA
	if (dgamouse) {
		dgamouse = false;
		XF86DGADirectVideo(dpy, DefaultScreen(dpy), 0);
	}
#endif // HAVE_XF86_DGA

	XUngrabPointer(dpy, CurrentTime);
	XUngrabKeyboard(dpy, CurrentTime);

// inviso cursor
	XUndefineCursor(dpy, win);

	mouse_active = false;
}

static void Force_CenterView_f (void)
{
	in_state->viewangles[PITCH] = 0;
}

static void RW_IN_MLookDown (void) 
{ 
	mlooking = true; 
}

static void RW_IN_MLookUp (void) 
{
	mlooking = false;
	in_state->IN_CenterView_fp ();
}

void RW_IN_Init(in_state_t *in_state_p)
{
	in_state = in_state_p;

#ifdef HAVE_JOYSTICK
	in_joystick = ri.Cvar_Get("in_joystick", "1", CVAR_ARCHIVE);
	j_invert_y = ri.Cvar_Get("j_invert_y", "1", CVAR_ARCHIVE);
#endif

	// mouse variables
	_windowed_mouse = ri.Cvar_Get( "_windowed_mouse", "0", CVAR_ARCHIVE );
#ifdef HAVE_JOYSTICK
	in_joystick = ri.Cvar_Get("in_joystick", "1", CVAR_ARCHIVE);
	j_invert_y = ri.Cvar_Get("j_invert_y", "1", CVAR_ARCHIVE);
#endif
	m_filter = ri.Cvar_Get ("m_filter", "0", 0);
    in_mouse = ri.Cvar_Get ("in_mouse", "1", CVAR_ARCHIVE);
    in_dgamouse = ri.Cvar_Get ("in_dgamouse", "1", CVAR_ARCHIVE);
	freelook = ri.Cvar_Get( "freelook", "0", 0 );
	lookstrafe = ri.Cvar_Get ("lookstrafe", "0", 0);
	sensitivity = ri.Cvar_Get ("sensitivity", "3", 0);
	m_pitch = ri.Cvar_Get ("m_pitch", "0.022", 0);
	m_yaw = ri.Cvar_Get ("m_yaw", "0.022", 0);
	m_forward = ri.Cvar_Get ("m_forward", "1", 0);
	m_side = ri.Cvar_Get ("m_side", "0.8", 0);

	ri.Cmd_AddCommand ("+mlook", RW_IN_MLookDown);
	ri.Cmd_AddCommand ("-mlook", RW_IN_MLookUp);

	ri.Cmd_AddCommand ("force_centerview", Force_CenterView_f);

	mx = my = 0.0;
	mouse_avail = true;

#ifdef HAVE_JOYSTICK
	if (in_joystick)
	    init_joystick();
#endif
}

void RW_IN_Shutdown(void)
{
	if (mouse_avail) {
		mouse_avail = false;
		
		ri.Cmd_RemoveCommand ("+mlook");
		ri.Cmd_RemoveCommand ("-mlook");
		ri.Cmd_RemoveCommand ("force_centerview");
	}

#ifdef HAVE_JOYSTICK
	if (joystick_avail)
	    if (close(joy_fd))
		ri.Con_Printf(PRINT_ALL, "Error, problem closing joystick.\n");
#endif
}

/*
===========
IN_Commands
===========
*/
void RW_IN_Commands(void) {
    int i;

#ifdef HAVE_JOYSTICK
    struct js_event e;
    int key_index;
#endif

    if (mouse_avail) {
	for (i = 0; i < 3; i++) {
	    if ((mouse_buttonstate & (1<<i)) && !(mouse_oldbuttonstate & (1<<i)))
		in_state->Key_Event_fp(K_MOUSE1 + i, true);
	    if (!(mouse_buttonstate & (1<<i)) && (mouse_oldbuttonstate & (1<<i)))
		in_state->Key_Event_fp(K_MOUSE1 + i, false);
	}
	/* not in loop because K_MOUSE4 doesn't come after K_MOUSE3 */
	if ((mouse_buttonstate & (1<<3)) && !(mouse_oldbuttonstate & (1<<3)))
            in_state->Key_Event_fp(K_MOUSE4, true);
        if (!(mouse_buttonstate * (1<<3)) && (mouse_oldbuttonstate & (1<<3)))
            in_state->Key_Event_fp(K_MOUSE4, false);
        
        if ((mouse_buttonstate & (1<<4)) && !(mouse_oldbuttonstate & (1<<4)))
            in_state->Key_Event_fp(K_MOUSE5, true);
        if (!(mouse_buttonstate * (1<<4)) && (mouse_oldbuttonstate & (1<<4)))
            in_state->Key_Event_fp(K_MOUSE5, false);

	mouse_oldbuttonstate = mouse_buttonstate;
    }

#ifdef HAVE_JOYSTICK
    if (joystick_avail) {
	while (read(joy_fd, &e, sizeof(struct js_event)) != -1) {
	    if (e.type & JS_EVENT_BUTTON) {
		key_index = (e.number < 4) ? K_JOY1 : K_AUX1;
		if (e.value)
		    in_state->Key_Event_fp(key_index + e.number, true);
		else
		    in_state->Key_Event_fp(key_index + e.number, false);
	    } else if (e.type & JS_EVENT_AXIS) {
		switch (e.number) {
		  case 0:
		    jx = e.value;
		    break;
		  case 1:
		    jy = e.value;
		    break;
		  case 3:
		    jt = e.value;
		    break;
		}
	    }
	}
    }
#endif
}

/*
===========
IN_Move
===========
*/
void RW_IN_Move (usercmd_t *cmd) {
    if (mouse_avail) {
	if (m_filter->value) {
	    mx = (mx + old_mouse_x) * 0.5;
	    my = (my + old_mouse_y) * 0.5;
	}

	old_mouse_x = mx;
	old_mouse_y = my;

	mx *= sensitivity->value;
	my *= sensitivity->value;

	/* add mouse X/Y movement to cmd */
	if ((*in_state->in_strafe_state & 1) || (lookstrafe->value && mlooking ))
	    cmd->sidemove += m_side->value * mx;
	else
	    in_state->viewangles[YAW] -= m_yaw->value * mx;

	if ((mlooking || freelook->value) && !(*in_state->in_strafe_state & 1))
	    in_state->viewangles[PITCH] += m_pitch->value * my;
	else
	    cmd->forwardmove -= m_forward->value * my;

	mx = my = 0;
    }
#ifdef HAVE_JOYSTICK
    if (joystick_avail) {
	/* add joy X/Y movement to cmd */
	if ((*in_state->in_strafe_state & 1) || (lookstrafe->value && mlooking))
	    cmd->sidemove += m_side->value * (jx/100);
	else
	    in_state->viewangles[YAW] -= m_yaw->value * (jx/100);

	if ((mlooking || freelook->value) && !(*in_state->in_strafe_state & 1)) {
	    if (j_invert_y)
		in_state->viewangles[PITCH] -= m_pitch->value * (jy/100);
	    else
		in_state->viewangles[PITCH] += m_pitch->value * (jy/100);
	    cmd->forwardmove -= m_forward->value * (jt/100);
	} else
	    cmd->forwardmove -= m_forward->value * (jy/100);
    }
#endif
}

static void IN_DeactivateMouse( void ) 
{
	if (!mouse_avail || !dpy || !win)
		return;

	if (mouse_active) {
		uninstall_grabs();
		mouse_active = false;
	}

#ifdef Joystick
	if (joystick_avail)
	  if (close(joy_fd))
	    ri.Con_Printf(PRINT_ALL, "Error, Problem closing joystick.");
#endif
}

static void IN_ActivateMouse( void ) 
{
	if (!mouse_avail || !dpy || !win)
		return;

	if (!mouse_active) {
		mx = my = 0; // don't spazz
		install_grabs();
		mouse_active = true;
	}
}

void RW_IN_Frame (void)
{
	int i;
#ifdef Joystick
	struct js_event e;
	int key_index;
#endif
	if (mouse_avail) { 
	  for (i=0 ; i<3 ; i++) {
	    if ( (mouse_buttonstate & (1<<i)) && !(mouse_oldbuttonstate & (1<<i)) )
	      in_state->Key_Event_fp (K_MOUSE1 + i, true);
	    
	    if ( !(mouse_buttonstate & (1<<i)) && (mouse_oldbuttonstate & (1<<i)) )
	      in_state->Key_Event_fp (K_MOUSE1 + i, false);
	  }
	  mouse_oldbuttonstate = mouse_buttonstate;
	}
#ifdef Joystick
	if (joystick_avail) {
	  while (read(joy_fd, &e, sizeof(struct js_event))!=-1) {
	    if (JS_EVENT_BUTTON & e.type) {
	      key_index = (e.number < 4) ? K_JOY1 : K_AUX1;
	      if (e.value) {
		in_state->Key_Event_fp (key_index + e.number, true);
	      }
	      else {
		in_state->Key_Event_fp (key_index + e.number, false);
	      }
	      //joy_oldbuttonstate = e.number;
	    }
	    else if (JS_EVENT_AXIS & e.type) {
	      switch (e.number) {
	      case 0:
		jx = e.value;
		break;
	      case 1:
		jy = e.value;
		break;
	      case 3:
		jt = e.value;
		break;
	      }
	    }
	  }
	}
#endif
}

void RW_IN_Activate(qboolean active)
{
	if (active || vidmode_active)
		IN_ActivateMouse();
	else
		IN_DeactivateMouse ();
}

/*****************************************************************************/
/* KEYBOARD                                                                  */
/*****************************************************************************/

static int XLateKey(XKeyEvent *ev)
{

	int key;
	char buf[64];
	KeySym keysym;

	key = 0;

	XLookupString(ev, buf, sizeof buf, &keysym, 0);

	switch(keysym)
	{
		case XK_KP_Page_Up:	 key = K_KP_PGUP; break;
		case XK_Page_Up:	 key = K_PGUP; break;

		case XK_KP_Page_Down: key = K_KP_PGDN; break;
		case XK_Page_Down:	 key = K_PGDN; break;

		case XK_KP_Home: key = K_KP_HOME; break;
		case XK_Home:	 key = K_HOME; break;

		case XK_KP_End:  key = K_KP_END; break;
		case XK_End:	 key = K_END; break;

		case XK_KP_Left: key = K_KP_LEFTARROW; break;
		case XK_Left:	 key = K_LEFTARROW; break;

		case XK_KP_Right: key = K_KP_RIGHTARROW; break;
		case XK_Right:	key = K_RIGHTARROW;		break;

		case XK_KP_Down: key = K_KP_DOWNARROW; break;
		case XK_Down:	 key = K_DOWNARROW; break;

		case XK_KP_Up:   key = K_KP_UPARROW; break;
		case XK_Up:		 key = K_UPARROW;	 break;

		case XK_Escape: key = K_ESCAPE;		break;

		case XK_KP_Enter: key = K_KP_ENTER;	break;
		case XK_Return: key = K_ENTER;		 break;

		case XK_Tab:		key = K_TAB;			 break;

		case XK_F1:		 key = K_F1;				break;

		case XK_F2:		 key = K_F2;				break;

		case XK_F3:		 key = K_F3;				break;

		case XK_F4:		 key = K_F4;				break;

		case XK_F5:		 key = K_F5;				break;

		case XK_F6:		 key = K_F6;				break;

		case XK_F7:		 key = K_F7;				break;

		case XK_F8:		 key = K_F8;				break;

		case XK_F9:		 key = K_F9;				break;

		case XK_F10:		key = K_F10;			 break;

		case XK_F11:
			if( ev->type == KeyPress ) {
				if( _windowed_mouse->value ) {
					Cvar_SetValue( "_windowed_mouse", 0 );
				} else {
					Cvar_SetValue( "_windowed_mouse", 1 );
				}
			} break;

		case XK_F12:		key = K_F12;			 break;

		case XK_BackSpace: key = K_BACKSPACE; break;

		case XK_KP_Delete: key = K_KP_DEL; break;
		case XK_Delete: key = K_DEL; break;

		case XK_Pause:	key = K_PAUSE;		 break;

		case XK_Shift_L:
		case XK_Shift_R:	key = K_SHIFT;		break;

		case XK_Execute: 
		case XK_Control_L: 
		case XK_Control_R:	key = K_CTRL;		 break;

		case XK_Alt_L:	
		case XK_Meta_L: 
		case XK_Alt_R:	
		case XK_Meta_R: key = K_ALT;			break;

		case XK_KP_Begin: key = K_KP_5;	break;

		case XK_Insert:key = K_INS; break;
		case XK_KP_Insert: key = K_KP_INS; break;

		case XK_KP_Multiply: key = '*'; break;
		case XK_KP_Add:  key = K_KP_PLUS; break;
		case XK_KP_Subtract: key = K_KP_MINUS; break;
		case XK_KP_Divide: key = K_KP_SLASH; break;

#if 0
		case 0x021: key = '1';break;/* [!] */
		case 0x040: key = '2';break;/* [@] */
		case 0x023: key = '3';break;/* [#] */
		case 0x024: key = '4';break;/* [$] */
		case 0x025: key = '5';break;/* [%] */
		case 0x05e: key = '6';break;/* [^] */
		case 0x026: key = '7';break;/* [&] */
		case 0x02a: key = '8';break;/* [*] */
		case 0x028: key = '9';;break;/* [(] */
		case 0x029: key = '0';break;/* [)] */
		case 0x05f: key = '-';break;/* [_] */
		case 0x02b: key = '=';break;/* [+] */
		case 0x07c: key = '\'';break;/* [|] */
		case 0x07d: key = '[';break;/* [}] */
		case 0x07b: key = ']';break;/* [{] */
		case 0x022: key = '\'';break;/* ["] */
		case 0x03a: key = ';';break;/* [:] */
		case 0x03f: key = '/';break;/* [?] */
		case 0x03e: key = '.';break;/* [>] */
		case 0x03c: key = ',';break;/* [<] */
#endif

	  default:
	    key = *(unsigned char*)buf;
	    if (key >= 'A' && key <= 'Z')
		key = key - 'A' + 'a';
	    if (key >= 1 && key <= 26) /* ctrl+alpha */
		key = key + 'a' - 1;
	    break;
	} 

	return key;
}


static void HandleEvents(void)
{
	XEvent event;
	int b;
	qboolean dowarp = false;
	int mwx = vid.width/2;
	int mwy = vid.height/2;
   
	if (!dpy)
		return;

	while (XPending(dpy)) {

		XNextEvent(dpy, &event);

		switch(event.type) {
		case KeyPress:
			myxtime = event.xkey.time;
		case KeyRelease:
			if (in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (XLateKey(&event.xkey), event.type == KeyPress);
			break;

		case MotionNotify:
			if (mouse_active) {
				if (dgamouse) {
					mx += (event.xmotion.x + win_x) * 2;
					my += (event.xmotion.y + win_y) * 2;
				} 
				else if( _windowed_mouse->value ) {
					int xoffset = ((int)event.xmotion.x - (int)(window_width / 2));
					int yoffset = ((int)event.xmotion.y - (int)(window_height / 2));

					if( xoffset != 0 || yoffset != 0 ) {

						mx += xoffset;
						my += yoffset;

						/* move the mouse to the window center again */
						XSelectInput( dpy, win, X_MASK & ~PointerMotionMask );
						XWarpPointer( dpy, None, win, 0, 0, 0, 0, 
						(window_width / 2), (window_height / 2) );
						XSelectInput( dpy, win, X_MASK );
					}
				}
				else 
				{
					mx += ((int)event.xmotion.x - mwx) * 2;
					my += ((int)event.xmotion.y - mwy) * 2;
					mwx = event.xmotion.x;
					mwy = event.xmotion.y;

					if (mx || my)
						dowarp = true;
				}
			}
			break;


		case ButtonPress:
			myxtime = event.xbutton.time;

			b = -1;
			if (event.xbutton.button == 1)
				b = 0;
			else if (event.xbutton.button == 2)
				b = 2;
			else if (event.xbutton.button == 3)
				b = 1;
			else if (event.xbutton.button == 4)
				in_state->Key_Event_fp (K_MWHEELUP, 1);
			else if (event.xbutton.button == 5)
				in_state->Key_Event_fp (K_MWHEELDOWN, 1);
			if (b>=0 && in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (K_MOUSE1 + b, true);
			break;

		case ButtonRelease:
			b = -1;
			if (event.xbutton.button == 1)
				b = 0;
			else if (event.xbutton.button == 2)
				b = 2;
			else if (event.xbutton.button == 3)
				b = 1;
			else if (event.xbutton.button == 4)
				in_state->Key_Event_fp (K_MWHEELUP, 0);
			else if (event.xbutton.button == 5)
				in_state->Key_Event_fp (K_MWHEELDOWN, 0);
			if (b>=0 && in_state && in_state->Key_Event_fp)
				in_state->Key_Event_fp (K_MOUSE1 + b, false);
			break;

		case CreateNotify :
			win_x = event.xcreatewindow.x;
			win_y = event.xcreatewindow.y;
			break;

		case ConfigureNotify :
			win_x = event.xconfigure.x;
			win_y = event.xconfigure.y;
			break;

		case ClientMessage:
			if (event.xclient.data.l[0] == wmDeleteWindow)
				ri.Cmd_ExecuteText(EXEC_NOW, "quit");
			break;

		case MapNotify:
			if( _windowed_mouse->value ) {
				XGrabPointer( dpy, win, True, 0, GrabModeAsync,
				GrabModeAsync, win, None, CurrentTime);
			}
 			break;

		case UnmapNotify:
			if( _windowed_mouse->value ) {
				XUngrabPointer( dpy, CurrentTime );
			}
			break;
		}
	}
	   
	if( old_windowed_mouse != _windowed_mouse->value ) {
		old_windowed_mouse = _windowed_mouse->value;

		if( !_windowed_mouse->value ) {
			/* ungrab the pointer */
			XUngrabPointer( dpy, CurrentTime );
		} else {
			/* grab the pointer */
			XGrabPointer( dpy, win, True, 0, GrabModeAsync,
				GrabModeAsync, win, None, CurrentTime );
		}
	}
	   
	if (dowarp) {
		/* move the mouse to the window center again */
		XWarpPointer(dpy,None,win,0,0,0,0, vid.width/2,vid.height/2);
	}
}

Key_Event_fp_t Key_Event_fp;

void KBD_Init(Key_Event_fp_t fp)
{
	Key_Event_fp = fp;
}

void KBD_Update(void)
{
// get events from x server
	HandleEvents();
}

void KBD_Close(void)
{
}

/*****************************************************************************/

char *RW_Sys_GetClipboardData()
{
	Window sowner;
	Atom type, property;
	unsigned long len, bytes_left, tmp;
	unsigned char *data;
	int format, result;
	char *ret = NULL;
                    
	sowner = XGetSelectionOwner(dpy, XA_PRIMARY);

	if (sowner != None) {
		property = XInternAtom(dpy,
							   "GETCLIPBOARDDATA_PROP",
							   False);

		XConvertSelection(dpy,
						  XA_PRIMARY, XA_STRING,
						  property, win, myxtime); /* myxtime == time of last X event */
		XFlush(dpy);

		XGetWindowProperty(dpy,
						   win, property,
						   0, 0, False, AnyPropertyType,
						   &type, &format, &len,
						   &bytes_left, &data);
		if (bytes_left > 0) {
			result =
				XGetWindowProperty(dpy,
								   win, property,
								   0, bytes_left, True, AnyPropertyType,
								   &type, &format, &len,
								   &tmp, &data);
			if (result == Success) {
				ret = strdup((char*) data);
			}
			XFree(data);
		}
	}
	return ret;
}

/*****************************************************************************/

//static qboolean GLimp_SwitchFullscreen( int width, int height );
qboolean GLimp_InitGL (void);

static void signal_handler(int sig)
{
	printf("Received signal %d, exiting...\n", sig);
	GLimp_Shutdown();
	_exit(0);
}

static void InitSig(void)
{
	signal(SIGHUP, signal_handler);
	signal(SIGQUIT, signal_handler);
	signal(SIGILL, signal_handler);
	signal(SIGTRAP, signal_handler);
	signal(SIGIOT, signal_handler);
	signal(SIGBUS, signal_handler);
	signal(SIGFPE, signal_handler);
	signal(SIGSEGV, signal_handler);
	signal(SIGTERM, signal_handler);
}

/*
** GLimp_SetMode
*/
int GLimp_SetMode( unsigned int *pwidth, unsigned int *pheight, int mode, qboolean fullscreen )
{
	unsigned int width, height;
	int attrib[] = {
		GLX_RGBA,
		GLX_DOUBLEBUFFER,
		GLX_RED_SIZE, 1,
		GLX_GREEN_SIZE, 1,
		GLX_BLUE_SIZE, 1,
		GLX_DEPTH_SIZE, 1,
		GLX_STENCIL_SIZE, 1,
		None
	};
	int attrib_nostencil[] = {
		GLX_RGBA,
		GLX_DOUBLEBUFFER,
		GLX_RED_SIZE, 1,
		GLX_GREEN_SIZE, 1,
		GLX_BLUE_SIZE, 1,
		GLX_DEPTH_SIZE, 1,
		None
	};
	Window root;
	XVisualInfo *visinfo;
	XSetWindowAttributes attr;
	XSizeHints *sizehints;
	XWMHints *wmhints;
	unsigned long mask;
	int MajorVersion, MinorVersion;
	int actualWidth, actualHeight;
	int i;

	r_fakeFullscreen = ri.Cvar_Get( "r_fakeFullscreen", "0", CVAR_ARCHIVE);

	ri.Con_Printf( PRINT_ALL, "Initializing OpenGL display\n");

	if (fullscreen)
		ri.Con_Printf (PRINT_ALL, "...setting fullscreen mode %d:", mode );
	else
		ri.Con_Printf (PRINT_ALL, "...setting mode %d:", mode );

	if ( !ri.Vid_GetModeInfo( &width, &height, mode ) )
	{
		ri.Con_Printf( PRINT_ALL, " invalid mode\n" );
		return rserr_invalid_mode;
	}

	ri.Con_Printf( PRINT_ALL, " %d %d\n", width, height );

	window_width = width;
	window_height = height;

	// destroy the existing window
	GLimp_Shutdown ();

#if 0 // this breaks getenv()? - sbf
	// Mesa VooDoo hacks
	if (fullscreen)
		putenv("MESA_GLX_FX=fullscreen");
	else
		putenv("MESA_GLX_FX=window");
#endif

	if (!(dpy = XOpenDisplay(NULL))) {
		fprintf(stderr, "Error couldn't open the X display\n");
		return rserr_invalid_mode;
	}

	scrnum = DefaultScreen(dpy);
	root = RootWindow(dpy, scrnum);

	// Get video mode list
	MajorVersion = MinorVersion = 0;
#ifdef HAVE_XF86_VIDMODE
	if (!XF86VidModeQueryVersion(dpy, &MajorVersion, &MinorVersion)) { 
		vidmode_ext = false;
	} else {
		ri.Con_Printf(PRINT_ALL, "Using XFree86-VidModeExtension Version %d.%d\n",
			MajorVersion, MinorVersion);
		vidmode_ext = true;
	}
#endif // HAVE_XF86_VIDMODE

	visinfo = qglXChooseVisual(dpy, scrnum, attrib);
	if (!visinfo) {
		fprintf(stderr, "W: couldn't get an RGBA, DOUBLEBUFFER, DEPTH, STENCIL visual\n");
		visinfo = qglXChooseVisual(dpy, scrnum, attrib_nostencil);
		if (!visinfo) {
			fprintf(stderr, "E: couldn't get an RGBA, DOUBLEBUFFER, DEPTH visual\n");
			return rserr_invalid_mode;
		}
	}

	gl_state.hwgamma = false;

	/* do some pantsness */
	if ( qglXGetConfig )
	{
		int red_bits, blue_bits, green_bits, depth_bits, alpha_bits;

		qglXGetConfig(dpy, visinfo, GLX_RED_SIZE, &red_bits);
		qglXGetConfig(dpy, visinfo, GLX_BLUE_SIZE, &blue_bits);
		qglXGetConfig(dpy, visinfo, GLX_GREEN_SIZE, &green_bits);
		qglXGetConfig(dpy, visinfo, GLX_DEPTH_SIZE, &depth_bits);
		qglXGetConfig(dpy, visinfo, GLX_ALPHA_SIZE, &alpha_bits);

		ri.Con_Printf(PRINT_ALL, "I: got %d bits of red\n", red_bits);
		ri.Con_Printf(PRINT_ALL, "I: got %d bits of blue\n", blue_bits);
		ri.Con_Printf(PRINT_ALL, "I: got %d bits of green\n", green_bits);
		ri.Con_Printf(PRINT_ALL, "I: got %d bits of depth\n", depth_bits);
		ri.Con_Printf(PRINT_ALL, "I: got %d bits of alpha\n", alpha_bits);
	}

	/* stencilbuffer shadows */
	if ( qglXGetConfig )
	{
		int stencil_bits;

		if (!qglXGetConfig(dpy, visinfo, GLX_STENCIL_SIZE, &stencil_bits)) {
			ri.Con_Printf(PRINT_ALL, "I: got %d bits of stencil\n", stencil_bits);
			if (stencil_bits >= 1) {
				have_stencil = true;
			}
		}
	}

#ifdef HAVE_XF86_VIDMODE
	if (vidmode_ext) {
		int best_fit, best_dist, dist, x, y;
		
		XF86VidModeGetAllModeLines(dpy, scrnum, &num_vidmodes, &vidmodes);

		// Are we going fullscreen?  If so, let's change video mode
		if (fullscreen && !r_fakeFullscreen->value) {
			best_dist = 9999999;
			best_fit = -1;

			for (i = 0; i < num_vidmodes; i++) {
				if (width > vidmodes[i]->hdisplay ||
					height > vidmodes[i]->vdisplay)
					continue;

				x = width - vidmodes[i]->hdisplay;
				y = height - vidmodes[i]->vdisplay;
				dist = (x * x) + (y * y);
				if (dist < best_dist) {
					best_dist = dist;
					best_fit = i;
				}
			}

			if (best_fit != -1) {
				actualWidth = vidmodes[best_fit]->hdisplay;
				actualHeight = vidmodes[best_fit]->vdisplay;

				// change to the mode
				XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[best_fit]);
				vidmode_active = true;

				if (XF86VidModeGetGamma(dpy, scrnum, &oldgamma)) {
					gl_state.hwgamma = true;
					/* We can not reliably detect hardware gamma
					 * changes across software gamma calls, which
					 * can reset the flag, so change it anyway */
					vid_gamma->modified = true;
					ri.Con_Printf( PRINT_ALL, "Using hardware gamma\n");
				}

				// Move the viewport to top left
				XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
			} else
				fullscreen = 0;
		}
	}
#endif // HAVE_XF86_VIDMODE

	/* window attributes */
	attr.background_pixel = 0;
	attr.border_pixel = 0;
	attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
	attr.event_mask = X_MASK;
	if (vidmode_active) {
		mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | 
			CWEventMask | CWOverrideRedirect;
		attr.override_redirect = True;
		attr.backing_store = NotUseful;
		attr.save_under = False;
	} else
		mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;

	win = XCreateWindow(dpy, root, 0, 0, width, height,
			    0, visinfo->depth, InputOutput,
			    visinfo->visual, mask, &attr);
	
	sizehints = XAllocSizeHints();
	if (sizehints) {
		sizehints->min_width = width;
		sizehints->min_height = height;
		sizehints->max_width = width;
		sizehints->max_height = height;
		sizehints->base_width = width;
		sizehints->base_height = vid.height;
		
		sizehints->flags = PMinSize | PMaxSize | PBaseSize;
	}

	wmhints = XAllocWMHints();
	if (wmhints) {
#include "../data/pixmaps/q2icon.xbm"

	    Pixmap icon_pixmap, icon_mask;
	    unsigned long fg, bg;
	    int i;

	    fg = BlackPixel(dpy, visinfo->screen);
	    bg = WhitePixel(dpy, visinfo->screen);
	    icon_pixmap = XCreatePixmapFromBitmapData(dpy, win, (char *)q2icon_bits, q2icon_width, q2icon_height, fg, bg, visinfo->depth);
	    for (i = 0; i < sizeof(q2icon_bits); i++)
		q2icon_bits[i] = ~q2icon_bits[i];
	    icon_mask = XCreatePixmapFromBitmapData(dpy, win, (char *)q2icon_bits, q2icon_width, q2icon_height, bg, fg, visinfo->depth); 

	    wmhints->flags = IconPixmapHint|IconMaskHint;
	    wmhints->icon_pixmap = icon_pixmap;
	    wmhints->icon_mask = icon_mask;
	}
	
	XSetWMProperties(dpy, win, NULL, NULL, NULL, 0,
			 sizehints, wmhints, None);
	if (sizehints)
		XFree(sizehints);
	if (wmhints)
		XFree(wmhints);

	XStoreName(dpy, win, "Quake II");

	wmDeleteWindow = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
	XSetWMProtocols(dpy, win, &wmDeleteWindow, 1);

	XMapWindow(dpy, win);

#ifdef HAVE_XF86_VIDMODE
	if (vidmode_active) {
		XMoveWindow(dpy, win, 0, 0);
		XRaiseWindow(dpy, win);
		XWarpPointer(dpy, None, win, 0, 0, 0, 0, 0, 0);
		XFlush(dpy);
		// Move the viewport to top left
		XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
	}
#endif // HAVE_XF86_VIDMODE

	XFlush(dpy);

	ctx = qglXCreateContext(dpy, visinfo, NULL, True);

	qglXMakeCurrent(dpy, win, ctx);

	*pwidth = width;
	*pheight = height;

	// let the sound and input subsystems know about the new window
	ri.Vid_NewWindow (width, height);

	qglXMakeCurrent(dpy, win, ctx);

	// inviso cursor
	XDefineCursor( dpy, win, CreateNullCursor( dpy, win ) );

	return rserr_ok;
}

/*
** GLimp_Shutdown
**
** This routine does all OS specific shutdown procedures for the OpenGL
** subsystem.  Under OpenGL this means NULLing out the current DC and
** HGLRC, deleting the rendering context, and releasing the DC acquired
** for the window.  The state structure is also nulled out.
**
*/
void GLimp_Shutdown( void )
{
	uninstall_grabs();
	mouse_active = false;
	dgamouse = false;

	if (dpy) {
		if (win)
			XDestroyWindow(dpy, win);
		if (ctx)
			qglXDestroyContext(dpy, ctx);
#ifdef HAVE_XF86_VIDMODE
		if (gl_state.hwgamma) {
			XF86VidModeSetGamma(dpy, scrnum, &oldgamma);
			/* The gamma has changed, but SetMode will change it
			 * anyway, so why bother?
			vid_gamma->modified = true;
			*/
		}
		if (vidmode_active)
			XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[0]);
#endif // HAVE_XF86_VIDMODE
		XUngrabKeyboard(dpy, CurrentTime);
		XCloseDisplay(dpy);
	}
	ctx = NULL;
	dpy = NULL;
	win = 0;
	ctx = NULL;

/*
	qglXChooseVisual	=	NULL;
	qglXCreateContext	=	NULL;
	qglXDestroyContext	=	NULL;
	qglXMakeCurrent		=	NULL;
	qglXCopyContext		=	NULL;
	qglXSwapBuffers		=	NULL;
*/
}

/*
** GLimp_Init
**
** This routine is responsible for initializing the OS specific portions
** of OpenGL.  
*/
int GLimp_Init( void *hinstance, void *wndproc )
{
	InitSig();

	if ( glw_state.OpenGLLib) {
		#define GPA( a ) dlsym( glw_state.OpenGLLib, a )

		qglXChooseVisual = (XVisualInfo*(*)(Display*, int, int*)) GPA("glXChooseVisual");
		qglXCreateContext = (GLXContext(*)(Display*, XVisualInfo*, GLXContext, Bool)) GPA("glXCreateContext");
		qglXDestroyContext = (void(*)(Display*, GLXContext)) GPA("glXDestroyContext");
		qglXMakeCurrent	= (Bool(*)(Display*, GLXDrawable, GLXContext)) GPA("glXMakeCurrent");
		qglXCopyContext	= (void(*)(Display*, GLXContext, GLXContext, GLuint)) GPA("glXCopyContext");
		qglXSwapBuffers	= (void(*)(Display*, GLXDrawable)) GPA("glXSwapBuffers");
		qglXGetConfig = (int(*)(Display *dpy, XVisualInfo *vis, int attrib, int *value)) GPA("glXGetConfig");

		return true;
	}

	return false;
}

/*
** GLimp_BeginFrame
*/
void GLimp_BeginFrame( float camera_seperation )
{
}

/*
** GLimp_EndFrame
** 
** Responsible for doing a swapbuffers and possibly for other stuff
** as yet to be determined.  Probably better not to make this a GLimp
** function and instead do a call to GLimp_SwapBuffers.
*/
void GLimp_EndFrame (void)
{
	qglFlush();
	qglXSwapBuffers(dpy, win);
}

/* UpdateHardwareGamma
 *
 * We are using gamma relative to the desktop, so that we can share it
 * with software renderer and don't require to change desktop gamma to
 * match hardware gamma image brightness.  It seems that Quake 3 is
 * using the opposite approach, but it has no software renderer, after
 * all.
 */
void UpdateHardwareGamma() {
#ifdef HAVE_XF86_VIDMODE
	XF86VidModeGamma gamma;
	float g;

	g = (1.3 - vid_gamma->value + 1);
	g = (g > 1) ? g : 1;
	gamma.red = oldgamma.red * g;
	gamma.green = oldgamma.green * g;
	gamma.blue = oldgamma.blue * g;
	ri.Con_Printf(PRINT_ALL, "Setting gamma to %f\n", g);
	XF86VidModeSetGamma(dpy, scrnum, &gamma);
#endif // HAVE_XF86_VIDMODE     
}

/*
** GLimp_AppActivate
*/
void GLimp_AppActivate( qboolean active )
{
}

void Fake_glColorTableEXT( GLenum target, GLenum internalformat,
                             GLsizei width, GLenum format, GLenum type,
                             const GLvoid *table )
{
	byte temptable[256][4];
	byte *intbl;
	int i;

	for (intbl = (byte *)table, i = 0; i < 256; i++) {
		temptable[i][2] = *intbl++;
		temptable[i][1] = *intbl++;
		temptable[i][0] = *intbl++;
		temptable[i][3] = 255;
	}
	qgl3DfxSetPaletteEXT((GLuint *)temptable);
}
