/*
Copyright (C) 1996-1997	Id Software, Inc.
Copyright (C) 1999-2000	contributors of the QuakeForge project
Copyright (C) 2000	Marcus Sundberg [mackan@stacken.kth.se]
Please see the file "AUTHORS" for a list of contributors

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.

*/
// vid_x.c -- general x video driver

#define _BSD
#include "config.h"

#include <ctype.h>
#include <sys/time.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/extensions/XShm.h>
#include <errno.h>

#include "quakedef.h"
#include "d_local.h"
#include "keys.h"
#include "console.h"
#include "sound.h"
#include "cvar.h"
#include "draw.h"
#include "cmd.h"
#include "lib_replace.h"
#include "common.h"
#include "sys.h"
#include "client.h"

cvar_t		_windowed_mouse = {"_windowed_mouse","0", true};
cvar_t		m_filter = {"m_filter","0", true};

static qboolean	mouse_avail;
static float	mouse_x, mouse_y;
static float	old_mouse_x, old_mouse_y;
static int	p_mouse_x, p_mouse_y;
static qboolean	mouse_in_window = false;
static qboolean	mouse_grabbed = false; // we grab it when console is up

typedef struct
{
	int input;
	int output;
} keymap_t;

viddef_t	vid; // global video state
unsigned short	d_8to16table[256];

static Display		*x_disp = NULL;
static Window		x_win;
static Colormap		x_cmap;
static GC		x_gc;
static Visual		*x_vis;
static XVisualInfo	*x_visinfo;
static Atom		aWMDelete = 0;


int XShmQueryExtension(Display *);
int XShmGetEventBase(Display *);

static qboolean		doShm;
static int		x_shmeventtype;
static XShmSegmentInfo	x_shminfo[2];

static qboolean		oktodraw = false;

static int		current_framebuffer;
static XImage		*x_framebuffer[2] = { 0, 0 };

static int verbose = 0;

int	VID_options_items = 1;

static byte current_palette[768];

typedef unsigned short PIXEL16;
typedef unsigned long PIXEL24;
static PIXEL16 st2d_8to16table[256];
static PIXEL24 st2d_8to24table[256];
static int shiftmask_fl=0;
static long r_shift,g_shift,b_shift;
static unsigned long r_mask,g_mask,b_mask;

static long X11_highhunkmark;

#define STD_EVENT_MASK \
	(KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask \
	 | PointerMotionMask | EnterWindowMask | LeaveWindowMask \
	 | VisibilityChangeMask | ExposureMask | StructureNotifyMask)


// The following X property format is defined in Motif 1.1's
// Xm/MwmUtils.h, but QUAKE should not depend on that header
// file. Note: Motif 1.2 expanded this structure with
// uninteresting fields (to QUAKE) so just stick with the
// smaller Motif 1.1 structure.

#define MWM_HINTS_DECORATIONS   2
typedef struct
{
	long flags;
	long functions;
	long decorations;
	long input_mode;
} MotifWmHints;

static int	x_screen, x_screen_width, x_screen_height;
static int	x_center_width, x_center_height;

static Atom	aHints = 0;

static byte	surfcache[1024*1024];


static void
shiftmask_init()
{
	unsigned int x;

	r_mask=x_vis->red_mask;
	g_mask=x_vis->green_mask;
	b_mask=x_vis->blue_mask;
	for (r_shift=-8,x=1; x<r_mask; x <<= 1) r_shift++;
	for (g_shift=-8,x=1; x<g_mask; x <<= 1) g_shift++;
	for (b_shift=-8,x=1; x<b_mask; x <<= 1) b_shift++;
	shiftmask_fl=1;
}


static PIXEL16
xlib_rgb16(int r, int g, int b)
{
	PIXEL16 p = 0;

	if (shiftmask_fl==0) shiftmask_init();

	if (r_shift>0) {
		p=(r<<(r_shift))&r_mask;
	} else if (r_shift<0) {
		p=(r>>(-r_shift))&r_mask;
	} else p|=(r&r_mask);

	if (g_shift>0) {
		p|=(g<<(g_shift))&g_mask;
	} else if (g_shift<0) {
		p|=(g>>(-g_shift))&g_mask;
	} else p|=(g&g_mask);

	if (b_shift>0) {
		p|=(b<<(b_shift))&b_mask;
	} else if (b_shift<0) {
		p|=(b>>(-b_shift))&b_mask;
	} else p|=(b&b_mask);

	return p;
}


static PIXEL24
xlib_rgb24(int r,int g,int b)
{
	PIXEL24 p = 0;

	if (shiftmask_fl==0) shiftmask_init();

	if (r_shift>0) {
		p=(r<<(r_shift))&r_mask;
	} else if (r_shift<0) {
		p=(r>>(-r_shift))&r_mask;
	} else p|=(r&r_mask);

	if (g_shift>0) {
		p|=(g<<(g_shift))&g_mask;
	} else if (g_shift<0) {
		p|=(g>>(-g_shift))&g_mask;
	} else p|=(g&g_mask);

	if (b_shift>0) {
		p|=(b<<(b_shift))&b_mask;
	} else if (b_shift<0) {
		p|=(b>>(-b_shift))&b_mask;
	} else p|=(b&b_mask);

	return p;
}


static void
st2_fixup(XImage *framebuf, int x, int y, int width, int height)
{
	int xi,yi;
	unsigned char *src;
	PIXEL16 *dest;

	if (x < 0 || y < 0) return;

	for (yi = y; yi < (y+height); yi++) {
		src = &framebuf->data [yi * framebuf->bytes_per_line];
		dest = (PIXEL16*)src;
		for(xi = (x+width-1); xi >= x; xi--) {
			dest[xi] = st2d_8to16table[src[xi]];
		}
	}
}


static void
st3_fixup(XImage *framebuf, int x, int y, int width, int height)
{
	int yi;
	unsigned char *src;
	PIXEL24 *dest;
	register int count, n;

	if (x < 0 || y < 0) return;

	for (yi = y; yi < (y+height); yi++) {
		src = &framebuf->data [yi * framebuf->bytes_per_line];

		// Duff's Device
		count = width;
		n = (count + 7) / 8;
		dest = ((PIXEL24 *)src) + x+width - 1;
		src += x+width - 1;

		switch (count % 8) {
		case 0:	do {	*dest-- = st2d_8to24table[*src--];
		case 7:			*dest-- = st2d_8to24table[*src--];
		case 6:			*dest-- = st2d_8to24table[*src--];
		case 5:			*dest-- = st2d_8to24table[*src--];
		case 4:			*dest-- = st2d_8to24table[*src--];
		case 3:			*dest-- = st2d_8to24table[*src--];
		case 2:			*dest-- = st2d_8to24table[*src--];
		case 1:			*dest-- = st2d_8to24table[*src--];
				} while (--n > 0);
		}

//		for(xi = (x+width-1); xi >= x; xi--) {
//			dest[xi] = st2d_8to16table[src[xi]];
//		}
	}
}

/*
================
D_BeginDirectRect
================
*/
void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
// direct drawing of the "accessing disk" icon isn't supported
}


/*
================
D_EndDirectRect
================
*/
void D_EndDirectRect (int x, int y, int width, int height)
{
// direct drawing of the "accessing disk" icon isn't supported
}


/*
=================
VID_Gamma_f

Keybinding command
=================
*/

byte vid_gamma[256];

void VID_Gamma_f (void)
{

	float	g, f, inf;
	int		i;

	if (Cmd_Argc () == 2) {
		g = Q_atof (Cmd_Argv(1));

		for (i=0 ; i<255 ; i++)	{
			f = pow ((i+1)/256.0, g);
			inf = f*255 + 0.5;
			if (inf < 0) inf = 0;
			if (inf > 255) inf = 255;
			vid_gamma[i] = inf;
		}

		VID_SetPalette(current_palette);

		vid.recalc_refdef = 1;	// force a surface cache flush
	}
}


// ========================================================================
// Tragic death handler
// ========================================================================

void TragicDeath(int signal_num)
{
	//XAutoRepeatOn(x_disp);
	VID_Shutdown();
	Sys_Error("This death brought to you by the number %d\n", signal_num);
}

// ========================================================================
// makes a null cursor
// ========================================================================

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
ResetFrameBuffer(void)
{
	int vid_surfcachesize, buffersize;
	void *vid_surfcache;
	int mem, pwidth;

	if (x_framebuffer[0]) {
		XDestroyImage(x_framebuffer[0]);
	}

	if (d_pzbuffer) {
		D_FlushCaches ();
		Hunk_FreeToHighMark(X11_highhunkmark);
		d_pzbuffer = NULL;
	}
	X11_highhunkmark = Hunk_HighMark ();

	/* Alloc an extra line in case we want to wrap, and allocate
	   the z-buffer */
	buffersize = vid.width * vid.height * sizeof(*d_pzbuffer);

	vid_surfcachesize = D_SurfaceCacheForRes(vid.width, vid.height);

	buffersize += vid_surfcachesize;

	d_pzbuffer = Hunk_HighAllocName(buffersize, "video");
	if (d_pzbuffer == NULL) {
		Sys_Error ("Not enough memory for video mode\n");
	}

	vid_surfcache = (byte *) d_pzbuffer
		+ vid.width * vid.height * sizeof(*d_pzbuffer);

	D_InitCaches(vid_surfcache, vid_surfcachesize);

	pwidth = x_visinfo->depth / 8;
	if (pwidth == 3) pwidth = 4;
	mem = ((vid.width*pwidth+7)&~7) * vid.height;

	x_framebuffer[0] = XCreateImage(x_disp, x_vis, x_visinfo->depth,
					ZPixmap, 0,
					malloc(mem),
					vid.width, vid.height,
					32, 0);

	if (!x_framebuffer[0]) {
		Sys_Error("VID: XCreateImage failed\n");
	}
}


static int
ResetSharedFrameBuffers(void)
{
	int size;
	int minsize = getpagesize();
	int frm;

	if (d_pzbuffer)	{
		D_FlushCaches ();
		Hunk_FreeToHighMark(X11_highhunkmark);
		d_pzbuffer = NULL;
	}

	X11_highhunkmark = Hunk_HighMark ();

	d_pzbuffer = Hunk_HighAllocName(vid.width*vid.height*sizeof(*d_pzbuffer),"zbuff");
	if (d_pzbuffer == NULL) {
		Sys_Error ("Not enough memory for video mode\n");
	}

	for (frm=0 ; frm<2 ; frm++) {
		/* Free up old frame buffer memory */
		if (x_framebuffer[frm])	{
			XShmDetach(x_disp, &x_shminfo[frm]);
			free(x_framebuffer[frm]);
			shmdt(x_shminfo[frm].shmaddr);
		}

		/* Create the image */
		x_framebuffer[frm] = XShmCreateImage(	x_disp,
						x_vis,
						x_visinfo->depth,
						ZPixmap,
						0,
						&x_shminfo[frm],
						vid.width,
						vid.height );

	// grab shared memory

		size = x_framebuffer[frm]->bytes_per_line
			* x_framebuffer[frm]->height;
		if (size < minsize)
			Sys_Error("VID: Window must use at least %d bytes\n", minsize);

		x_shminfo[frm].shmid = shmget(IPC_PRIVATE, size,IPC_CREAT|0777);
		if (x_shminfo[frm].shmid==-1) {
                        int i;
			Sys_Printf(
                        "VID: Could not get %dk of shared memory, error: %s\n",
                           size/1024, strerror(errno));
                        Sys_Printf("Trying without shared memory\n");
                        /* Deallocate memory */
                        /* Z_Free(d_pzbuffer); */
                        for (i = 0; i <= frm; i++) {
                           free(x_framebuffer[i]);
                           x_framebuffer[i] = 0;
                        }
                        return 0;
                }

		// attach to the shared memory segment
		x_shminfo[frm].shmaddr =
			(void *) shmat(x_shminfo[frm].shmid, 0, 0);

		printf("VID: shared memory id=%d, addr=0x%x\n", x_shminfo[frm].shmid,
			(int) x_shminfo[frm].shmaddr);

		x_framebuffer[frm]->data = x_shminfo[frm].shmaddr;

	// get the X server to attach to it

		if (!XShmAttach(x_disp, &x_shminfo[frm]))
			Sys_Error("VID: XShmAttach() failed\n");
		XSync(x_disp, 0);
		shmctl(x_shminfo[frm].shmid, IPC_RMID, 0);

	}
        return 1;
}

//
// VID_FullScreen - open the window in full screen mode
//

qboolean VID_FullScreen( Window win )
{
    MotifWmHints    hints;
    XWindowChanges  changes;

    aHints = XInternAtom( x_disp, "_MOTIF_WM_HINTS", 0 );
    if (aHints == None)
    {
		Con_Printf( "Could not intern X atom for _MOTIF_WM_HINTS." );
		return( false );
    }

    hints.flags = MWM_HINTS_DECORATIONS;
    hints.decorations = 0; // Absolutely no decorations.
    XChangeProperty( x_disp, win, aHints, aHints, 32, PropModeReplace, (unsigned char *)&hints, 4 );

    changes.x = 0;
    changes.y = 0;
    changes.width = x_screen_width;
    changes.height = x_screen_height;
    changes.stack_mode = TopIf;
    XConfigureWindow( x_disp, win, CWX | CWY | CWWidth | CWHeight | CWStackMode, &changes);
    return( true );
}

void	VID_Init (unsigned char *palette)
{
	int pnum, i;
	XVisualInfo template;
	int num_visuals;
	int template_mask;

	S_Init();	// sound is initialized here

	Cmd_AddCommand("gamma", VID_Gamma_f);
	for (i=0; i < 256; i++)	vid_gamma[i] = i;

	vid.width = 320;
	vid.height = 200;
	vid.maxwarpwidth = WARP_WIDTH;
	vid.maxwarpheight = WARP_HEIGHT;
	vid.numpages = 2;
	vid.colormap = host_colormap;
	vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));
	//vid.cbits = VID_CBITS;
	//vid.grades = VID_GRADES;

	srandom(getpid());

	verbose=COM_CheckParm("-verbose");

// open the display
	x_disp = XOpenDisplay(0);
	if (!x_disp)
	{
		if (getenv("DISPLAY"))
			Sys_Error("VID: Could not open display [%s]\n",
				getenv("DISPLAY"));
		else
			Sys_Error("VID: Could not open local display\n");
	}

    x_screen = XDefaultScreen( x_disp );
    x_screen_width = WidthOfScreen( ScreenOfDisplay( x_disp, x_screen ) );
    x_screen_height = HeightOfScreen( ScreenOfDisplay( x_disp, x_screen ) );

	x_center_width  = x_screen_width/2;

	x_center_height = x_screen_height/2;

    Con_Printf( "Using screen %d: %dx%d\n", x_screen, x_screen_width, x_screen_height );

// catch signals so i can turn on auto-repeat
// we never run full-screen, so no auto-repeat nukage
	if (0)
	{
		struct sigaction sa;
		sigaction(SIGINT, 0, &sa);
		sa.sa_handler = TragicDeath;
		sigaction(SIGINT, &sa, 0);
		sigaction(SIGTERM, &sa, 0);
	}

	//XAutoRepeatOff(x_disp);

// for debugging only
//	XSynchronize(x_disp, True);

// check for command-line window size
	if ((pnum=COM_CheckParm("-winsize")))
	{
		if (pnum >= com_argc-2)
			Sys_Error("VID: -winsize <width> <height>\n");
		vid.width = Q_atoi(com_argv[pnum+1]);
		vid.height = Q_atoi(com_argv[pnum+2]);
		if (!vid.width || !vid.height)
			Sys_Error("VID: Bad window width/height\n");
	}

	template_mask = 0;

// specify a visual id
	if ((pnum=COM_CheckParm("-visualid")))
	{
		if (pnum >= com_argc-1)
			Sys_Error("VID: -visualid <id#>\n");
		template.visualid = Q_atoi(com_argv[pnum+1]);
		template_mask = VisualIDMask;
	}

// If not specified, use default visual
	else
	{
		int screen;
		screen = XDefaultScreen(x_disp);
		template.visualid =
			XVisualIDFromVisual(XDefaultVisual(x_disp, screen));
		template_mask = VisualIDMask;
	}

// pick a visual- warn if more than one was available
	x_visinfo = XGetVisualInfo(x_disp, template_mask, &template, &num_visuals);
	if (num_visuals > 1) {
		printf("Found more than one visual id at depth %d:\n", template.depth);
		for (i=0 ; i<num_visuals ; i++)
			printf("	-visualid %d\n", (int)(x_visinfo[i].visualid));
	} else if (num_visuals == 0) {
		if (template_mask == VisualIDMask) {
			Sys_Error("VID: Bad visual id %d\n",
				  template.visualid);
		} else {
			Sys_Error("VID: No visuals at depth %d\n",
				  template.depth);
		}
	}

	if (verbose) {
		printf("Using visualid %d:\n", (int)(x_visinfo->visualid));
		printf("	class %d\n", x_visinfo->class);
		printf("	screen %d\n", x_visinfo->screen);
		printf("	depth %d\n", x_visinfo->depth);
		printf("	red_mask 0x%x\n", (int)(x_visinfo->red_mask));
		printf("	green_mask 0x%x\n", (int)(x_visinfo->green_mask));
		printf("	blue_mask 0x%x\n", (int)(x_visinfo->blue_mask));
		printf("	colormap_size %d\n", x_visinfo->colormap_size);
		printf("	bits_per_rgb %d\n", x_visinfo->bits_per_rgb);
	}

	x_vis = x_visinfo->visual;

	/* Setup attributes for main window */
	{
		int attribmask = CWEventMask | CWBorderPixel;
		XSetWindowAttributes attribs;

		attribs.event_mask = STD_EVENT_MASK;
		attribs.border_pixel = 0;

		/* Create the main window */
		x_win = XCreateWindow(x_disp,
			      XRootWindow(x_disp, x_visinfo->screen),
			      0, 0, vid.width, vid.height,
			      0, /* borderwidth	*/
			      x_visinfo->depth, InputOutput, x_vis,
			      attribmask, &attribs);

		/* Give it a title */
		XStoreName(x_disp, x_win, "XQuake");

		/* Make window respond to Delete events */
		aWMDelete = XInternAtom(x_disp, "WM_DELETE_WINDOW", False);
		XSetWMProtocols(x_disp, x_win, &aWMDelete, 1);
	}

	if (x_visinfo->depth == 8) {
		/* Create and upload the palette */
		if (x_visinfo->class == PseudoColor) {
			x_cmap = XCreateColormap(x_disp, x_win,
						 x_vis, AllocAll);
			VID_SetPalette(palette);
			XSetWindowColormap(x_disp, x_win, x_cmap);
		}
	}

// create the GC
	{
		XGCValues xgcvalues;
		int valuemask = GCGraphicsExposures;
		xgcvalues.graphics_exposures = False;
		x_gc = XCreateGC(x_disp, x_win, valuemask, &xgcvalues );
	}

// map the window
	XMapWindow(x_disp, x_win);

// wait for first exposure event
	{
		XEvent event;
		do
		{
			XNextEvent(x_disp, &event);
			if (event.type == Expose && !event.xexpose.count)
				oktodraw = true;
		} while (!oktodraw);
	}
// now safe to draw

// even if MITSHM is available, make sure it's a local connection
	if (XShmQueryExtension(x_disp))
	{
		char *displayname;
		doShm = true;
		displayname = (char *) getenv("DISPLAY");
		if (displayname)
		{
			char *d = displayname;
			while (*d && (*d != ':')) d++;
			if (*d) *d = 0;
			if (!(!strcasecmp(displayname, "unix") || !*displayname))
				doShm = false;
		}
	}

	if (doShm)
	{
		x_shmeventtype = XShmGetEventBase(x_disp) + ShmCompletion;
		if (!ResetSharedFrameBuffers()) {
                   doShm = false;
                }
	}

        if (!doShm) ResetFrameBuffer();

	current_framebuffer = 0;
	vid.rowbytes = x_framebuffer[0]->bytes_per_line;
	vid.buffer = x_framebuffer[0]->data;
	vid.direct = 0;
	vid.conbuffer = x_framebuffer[0]->data;
	vid.conrowbytes = vid.rowbytes;
	vid.conwidth = vid.width;
	vid.conheight = vid.height;
	vid.aspect = ((float)vid.height / (float)vid.width) * (320.0 / 240.0);

	D_InitCaches (surfcache, sizeof(surfcache));
	
//	XSynchronize(x_disp, False);

}


void
VID_ShiftPalette(unsigned char *p)
{
	VID_SetPalette(p);
}


void
VID_SetPalette(unsigned char *palette)
{
	int i;
	XColor colors[256];

	for (i=0;i<256;i++) {
		st2d_8to16table[i] = xlib_rgb16(palette[i*3], palette[i*3+1],
						palette[i*3+2]);
		st2d_8to24table[i] = xlib_rgb24(palette[i*3], palette[i*3+1],
						palette[i*3+2]);
	}

	if (x_visinfo->class == PseudoColor && x_visinfo->depth == 8) {
		if (palette != current_palette) {
			memcpy(current_palette, palette, 768);
		}
		for (i=0 ; i<256 ; i++)	{
			colors[i].pixel	= i;
			colors[i].flags	= DoRed|DoGreen|DoBlue;
			colors[i].red	= vid_gamma[palette[i*3]] * 256;
			colors[i].green	= vid_gamma[palette[i*3+1]] * 256;
			colors[i].blue	= vid_gamma[palette[i*3+2]] * 256;
		}
		XStoreColors(x_disp, x_cmap, colors, 256);
	}
}


/*
  Called at shutdown
*/
void
VID_Shutdown(void)
{
	Con_Printf("VID_Shutdown\n");
	if (x_disp) {
		if (mouse_grabbed) {
			/* Ungrab the pointer */
			XUngrabPointer(x_disp, CurrentTime);
			XUndefineCursor(x_disp, x_win);
		}
		XCloseDisplay(x_disp);
	}
}


static int
XLateKey(XKeyEvent *ev)
{
	int key = 0;
	char buf[64];
	KeySym keysym;

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

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

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

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

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

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

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

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

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

		case XK_Escape:		key = K_ESCAPE; break;

		case XK_KP_Enter:	key = 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:		key = K_F11; break;
		case XK_F12:		key = K_F12; break;

		case XK_BackSpace:	key = K_BACKSPACE; break;

		case XK_KP_Delete:	key = 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_Mode_switch:
		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_AUX30; break;

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

		case XK_KP_Multiply:	key = KP_MULTIPLY; break;
		case XK_KP_Add:		key = KP_PLUS; break;
		case XK_KP_Subtract:	key = KP_MINUS; break;
		case XK_KP_Divide:	key = KP_DIVIDE; break;

		/* For Sun keyboards */
		case XK_F27:		key = K_HOME; break;
		case XK_F29:		key = K_PGUP; break;
		case XK_F33:		key = K_END; break;
		case XK_F35:		key = K_PGDN; 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');
			}
			break;
	} 

	return key;
}


static int config_notify=0;
static int config_notify_width;
static int config_notify_height;

static void
GetEvent(void)
{
	XEvent x_event;
	int but;

	XNextEvent(x_disp, &x_event);
	switch(x_event.type) {
	case KeyPress:
		Key_Event(XLateKey(&x_event.xkey), true);
		break;

	case KeyRelease:
		Key_Event(XLateKey(&x_event.xkey), false);
		break;

	case ButtonPress:
		but = x_event.xbutton.button;
		if (but == 2) but = 3;
		else if (but == 3) but = 2;
		switch(but) {
		case 1:
		case 2:
		case 3:
			Key_Event(K_MOUSE1 + but - 1, true);
		}
		break;

	case ButtonRelease:
		but = x_event.xbutton.button;
		if (but == 2) but = 3;
		else if (but == 3) but = 2;
		switch(but) {
		case 1:
		case 2:
		case 3:
			Key_Event(K_MOUSE1 + but - 1, false);
		}
		break;

	case MotionNotify:
		if (mouse_avail && mouse_grabbed) {
			mouse_x = (float) ((int)x_event.xmotion.x - (int)(vid.width/2));
			mouse_y = (float) ((int)x_event.xmotion.y - (int)(vid.height/2));
	//printf("m: x=%d,y=%d, mx=%3.2f,my=%3.2f\n", 
	//	x_event.xmotion.x, x_event.xmotion.y, mouse_x, mouse_y);

			/* move the mouse to the window center again */
			XSelectInput(x_disp,x_win, STD_EVENT_MASK & ~PointerMotionMask);
			XWarpPointer(x_disp,None,x_win,0,0,0,0, (vid.width/2),(vid.height/2));
			XSelectInput(x_disp,x_win, STD_EVENT_MASK);
		} else {
			mouse_x = (float) (x_event.xmotion.x-p_mouse_x);
			mouse_y = (float) (x_event.xmotion.y-p_mouse_y);
			p_mouse_x=x_event.xmotion.x;
			p_mouse_y=x_event.xmotion.y;
		}
		break;

	case ConfigureNotify:
		config_notify_width = x_event.xconfigure.width;
		config_notify_height = x_event.xconfigure.height;
		if (config_notify_width != vid.width ||
		    config_notify_height != vid.height) {
			config_notify = 1;
		}
		break;
	case EnterNotify:
		mouse_in_window = true;
		break;
	case LeaveNotify:
		mouse_in_window = false;
		break;
/* Host_Quit_f only available in uquake */
#ifdef UQUAKE
	case ClientMessage:
		if (x_event.xclient.data.l[0] == aWMDelete) Host_Quit_f();
		break;
#endif

	default:
		if (doShm && x_event.type == x_shmeventtype)
			oktodraw = true;
	}
   
	if (mouse_avail) {
		if (key_dest == key_game && !mouse_grabbed && mouse_in_window) {
			mouse_grabbed = true;
			/* grab the pointer */
			XGrabPointer(x_disp,x_win,True,0,GrabModeAsync,
				GrabModeAsync,x_win,None,CurrentTime);
			// inviso cursor
			XDefineCursor(x_disp, x_win, CreateNullCursor(x_disp, x_win));
		} else if ((key_dest != key_game || !mouse_in_window) && mouse_grabbed) {
			mouse_grabbed = false;
			/* ungrab the pointer */
			XUngrabPointer(x_disp, CurrentTime);
			XUndefineCursor(x_disp, x_win);
		}
	}
}


/*
  Flushes the given rectangles from the view buffer to the screen.
*/
void
VID_Update(vrect_t *rects)
{
	/* If the window changes dimension, skip this frame. */
	if (config_notify) {
		fprintf(stderr, "config notify\n");
		config_notify = 0;
		vid.width = config_notify_width & ~7;
		vid.height = config_notify_height;
		if (doShm)
			ResetSharedFrameBuffers();
		else
			ResetFrameBuffer();
		vid.rowbytes = x_framebuffer[0]->bytes_per_line;
		vid.buffer = x_framebuffer[current_framebuffer]->data;
		vid.conbuffer = vid.buffer;
		vid.conwidth = vid.width;
		vid.conheight = vid.height;
		vid.conrowbytes = vid.rowbytes;
		vid.recalc_refdef = 1;	/* force a surface cache flush */
		Con_CheckResize();
		Con_Clear_f();
		return;
	}

	if (doShm) {
		while (rects) {
			if (x_visinfo->depth == 16) {
				st2_fixup(x_framebuffer[current_framebuffer], 
					  rects->x, rects->y, rects->width,
					  rects->height);
			} else if (x_visinfo->depth == 24) {
				st3_fixup(x_framebuffer[current_framebuffer], 
					  rects->x, rects->y, rects->width,
					  rects->height);
			}
			if (!XShmPutImage(x_disp, x_win, x_gc,
				x_framebuffer[current_framebuffer],
					  rects->x, rects->y,
					  rects->x, rects->y,
					  rects->width, rects->height, True)) {
				Sys_Error("VID_Update: XShmPutImage failed\n");
			}
			oktodraw = false;
			while (!oktodraw) GetEvent();
			rects = rects->pnext;
		}
		current_framebuffer = !current_framebuffer;
		vid.buffer = x_framebuffer[current_framebuffer]->data;
		vid.conbuffer = vid.buffer;
		XSync(x_disp, False);
	} else {
		while (rects) {
			if (x_visinfo->depth == 16) {
				st2_fixup(x_framebuffer[current_framebuffer], 
					  rects->x, rects->y, rects->width,
					  rects->height);
			} else if (x_visinfo->depth == 24) {
				st3_fixup(x_framebuffer[current_framebuffer], 
					  rects->x, rects->y, rects->width,
					  rects->height);
			}
			XPutImage(x_disp, x_win, x_gc, x_framebuffer[0],
				  rects->x, rects->y, rects->x, rects->y,
				  rects->width, rects->height);
			rects = rects->pnext;
		}
		XSync(x_disp, False);
	}
}

static int dither;

void
VID_DitherOn(void)
{
	if (dither == 0) {
		vid.recalc_refdef = 1;
		dither = 1;
	}
}


void
VID_DitherOff(void)
{
	if (dither) {
		vid.recalc_refdef = 1;
		dither = 0;
	}
}


void
Sys_SendKeyEvents(void)
{
	/* Get events from X server. */
	if (x_disp) {
		while (XPending(x_disp)) GetEvent();
	}
}


void
IN_Init(void)
{
	Cvar_RegisterVariable(&m_filter);
	if (COM_CheckParm("-nomouse")) return;
	mouse_x = mouse_y = 0.0;
	mouse_avail = 1;
}


void
IN_Shutdown(void)
{
	mouse_avail = 0;
}


void
IN_Commands(void)
{
	/* Nothing to do here */
}


void
IN_Move(usercmd_t *cmd)
{
	if (!mouse_avail)
		return;
   
	if (m_filter.value) {
		mouse_x = (mouse_x + old_mouse_x) * 0.5;
		mouse_y = (mouse_y + old_mouse_y) * 0.5;
	}

	old_mouse_x = mouse_x;
	old_mouse_y = mouse_y;
   
	mouse_x *= sensitivity.value;
	mouse_y *= sensitivity.value;
   
	if ( (in_strafe.state & 1) || (lookstrafe.value && (in_mlook.state & 1) ))
		cmd->sidemove += m_side.value * mouse_x;
	else
		cl.viewangles[YAW] -= m_yaw.value * mouse_x;
	if (in_mlook.state & 1)
		V_StopPitchDrift ();
   
	if ( (in_mlook.state & 1) && !(in_strafe.state & 1)) {
		cl.viewangles[PITCH] += m_pitch.value * mouse_y;
		if (cl.viewangles[PITCH] > 80)
			cl.viewangles[PITCH] = 80;
		if (cl.viewangles[PITCH] < -70)
			cl.viewangles[PITCH] = -70;
	} else {
		if ((in_strafe.state & 1) && noclip_anglehack)
			cmd->upmove -= m_forward.value * mouse_y;
		else
			cmd->forwardmove -= m_forward.value * mouse_y;
	}
	mouse_x = mouse_y = 0.0;
}

void VID_ExtraOptionDraw(unsigned int options_draw_cursor)
{
	// Windowed Mouse
	M_Print(16, options_draw_cursor+=8, "             Use Mouse");
	M_DrawCheckbox(220, options_draw_cursor, _windowed_mouse.value);
}

void VID_ExtraOptionCmd(int option_cursor)
{
	switch (option_cursor) {
	case 1:	// _windowed_mouse
		Cvar_SetValue ("_windowed_mouse", !_windowed_mouse.value);
		break;
	}
}