/*
Copyright (C) 1996-1997 Id Software, Inc.

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 <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#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 "quakedef.h"
#include "d_local.h"

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

qboolean        mouse_avail;
int             mouse_buttons = 3;
int             mouse_oldbuttonstate;
int             mouse_buttonstate;
float   mouse_x, mouse_y;
float   old_mouse_x, old_mouse_y;
int p_mouse_x;
int p_mouse_y;
qboolean	mouse_grabbed = false; // we grab it when console is up

int		VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes, VGA_planar;
byte	*VGA_pagebase;

// 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;

#define MAX_COLUMN_SIZE	11

#define MAX_MODEDESCS	(MAX_COLUMN_SIZE*3)

typedef struct
{
	int		modenum;
	int		iscur;
	char	desc[256];
} modedesc_t;

extern void M_Menu_Options_f (void);
extern void M_Print (int cx, int cy, char *str);
extern void M_PrintWhite (int cx, int cy, char *str);
extern void M_DrawCharacter (int cx, int line, int num);
extern void M_DrawTransPic (int x, int y, qpic_t *pic);
extern void M_DrawPic (int x, int y, qpic_t *pic);

extern int sb_updates;
extern int x_root, y_root; // root window relative mouse coords

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

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

int		num_shades = 32;

int	d_con_indirect = 0;

int		vid_buffersize;

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

qboolean				x_fullscreen = true;
Display					*x_disp = NULL;
int						x_screen, x_screen_width, x_screen_height;
int				x_center_width, x_center_height;
int						x_std_event_mask = STD_EVENT_MASK;
Window					x_win, x_root_win;
qboolean				mouse_in_window = false;
int				global_dx, global_dy;

static qboolean			doShm;
static Colormap			x_cmap;
static GC				x_gc;
static Visual			*x_vis;
static XVisualInfo		*x_visinfo;
static Atom				aHints = 0;
static Atom				aWMDelete = 0;

static int				x_shmeventtype;
//static XShmSegmentInfo	x_shminfo;

static qboolean			oktodraw = false;

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

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

static int verbose = 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;

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 = x << 1) r_shift++;
	for (g_shift = -8, x = 1; x < g_mask; x = x << 1) g_shift++;
	for (b_shift = -8, x = 1; x < b_mask; x = x << 1) b_shift++;
	shiftmask_fl = 1;
}

PIXEL16 xlib_rgb16 (int r, int g, int b)
{
	PIXEL16 p;
	if (shiftmask_fl == 0) shiftmask_init();
	p = 0;
	
	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;
}

PIXEL24 xlib_rgb24 (int r, int g, int b)
{
	PIXEL24 p;
	if (shiftmask_fl == 0) shiftmask_init();
	p = 0;
	
	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;
}

void st2_fixup (XImage *framebuf, int x, int y, int width, int height)
{
	int xi, yi;
	unsigned char *src;
	PIXEL16 *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 = ( (PIXEL16 *) src) + x + width - 1;
		src += x + width - 1;
		
		switch (count % 8)
		{
			case 0:
				do
				{
					*dest-- = st2d_8to16table[*src--];
				case 7:
					*dest-- = st2d_8to16table[*src--];
				case 6:
					*dest-- = st2d_8to16table[*src--];
				case 5:
					*dest-- = st2d_8to16table[*src--];
				case 4:
					*dest-- = st2d_8to16table[*src--];
				case 3:
					*dest-- = st2d_8to16table[*src--];
				case 2:
					*dest-- = st2d_8to16table[*src--];
				case 1:
					*dest-- = st2d_8to16table[*src--];
				}
				while (--n > 0);
		}
		
//		for(xi = (x+width-1); xi >= x; xi--) {
//			dest[xi] = st2d_8to16table[src[xi]];
//		}
	}
}

void st3_fixup (XImage *framebuf, int x, int y, int width, int height)
{
	int xi, 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 under Nextstep
}


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


/*
=================
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;
}

void ResetFrameBuffer (void)
{

	int mem;
	int pwidth;
	
	if (x_framebuffer[0])
	{
		Z_Free (x_framebuffer[0]->data);
//		Z_Free(d_pzbuffer);
		free (x_framebuffer[0]);
	}
	
	pwidth = x_visinfo->depth / 8;
	if (pwidth == 3) pwidth = 4;
	mem = ( (vid.width * pwidth + 3) &~3) * vid.height;
	
//	d_pzbuffer = (unsigned short *) Z_Malloc(vid.width*vid.height*
//		sizeof(*d_pzbuffer));
	d_pzbuffer = (short *) Hunk_HighAllocName (vid.width * vid.height *
				 sizeof (*d_pzbuffer), "zbuff");
				 
	x_framebuffer[0] = XCreateImage (x_disp,
									 x_vis,
									 x_visinfo->depth,
									 ZPixmap,
									 0,
									 Z_Malloc (mem),
									 vid.width, vid.height,
									 32,
									 0);
									 
	if (!x_framebuffer[0])
		Sys_Error ("VID: XCreateImage failed\n");
		
}

void ResetSharedFrameBuffers (void)
{

	int size;
	int key;
	int minsize = getpagesize();
	int frm;
	
//	if (d_pzbuffer)
//		Z_Free(d_pzbuffer);
	d_pzbuffer = Hunk_HighAllocName (vid.width * vid.height * sizeof (*d_pzbuffer), "zbuff");
	
	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);
			
		key = random();
		x_shminfo[frm].shmid = shmget ( (key_t) key, size, IPC_CREAT | 0777);
		if (x_shminfo[frm].shmid == -1)
			Sys_Error ("VID: Could not get any shared memory\n");
			
		// 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);
		
	}
	
}

void VID_MenuDraw (void)
{
	qpic_t		*p;
	char		*ptr;
	int			i, j, column, row, dup;
	char		temp[100];
	
	p = Draw_CachePic ("gfx/vidmodes.lmp");
	M_DrawPic ( (320 - p->width) / 2, 4, p);
	M_Print (4 * 8, 36 + MAX_COLUMN_SIZE * 8 + 8, "Video mode switching unavailable");
	M_Print (9 * 8, 36 + MAX_COLUMN_SIZE * 8 + 8 * 6, "Press any key...");
}

void VID_MenuKey (int key)
{
	M_Menu_Options_f ();
}

// Called at startup to set up translation tables, takes 256 8 bit RGB values
// the palette data will go away after the call, so it must be copied off if
// the video driver will need it again

byte	surfcache[1024*1024];

//
// VID_SetWindowTitle - set the window and icon titles
//

void VID_SetWindowTitle (Window win, char *pszName)
{
	XTextProperty	textprop;
	XWMHints		*wmHints;
	
	// Setup ICCCM properties
	textprop.value = (unsigned char *) pszName;
	textprop.encoding = XA_STRING;
	textprop.format = 8;
	textprop.nitems = strlen (pszName);
	wmHints = XAllocWMHints();
	wmHints->initial_state = NormalState;
	wmHints->flags = StateHint;
	XSetWMProperties (x_disp, win, &textprop, &textprop,
					  // Only put WM_COMMAND property on first window.
					  com_argv, com_argc, NULL, NULL, NULL);
	XFree (wmHints);
	
	aWMDelete = XInternAtom (x_disp, "WM_DELETE_WINDOW", False);
	XSetWMProtocols (x_disp, win, &aWMDelete, 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;
	
	Cmd_AddCommand ("gamma", VID_Gamma_f);
	for (i = 0 ; i < 256 ; i++)
		vid_gamma[i] = i;
		
	vid.width = 320;
	vid.height = 200;
	vid.aspect = 1.0;
	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);
	
	x_root_win = XRootWindow (x_disp, x_screen);
	
// 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  | CWColormap | CWBorderPixel;
		XSetWindowAttributes attribs;
		Colormap tmpcmap;
		
		tmpcmap = XCreateColormap (x_disp, XRootWindow (x_disp,
								   x_visinfo->screen), x_vis, AllocNone);
								   
		attribs.event_mask = x_std_event_mask;
		attribs.border_pixel = 0;
		attribs.colormap = tmpcmap;
		
// create the main window
		x_win = XCreateWindow (x_disp,
							   XRootWindow (x_disp, x_visinfo->screen),
							   0, 0,	// x, y
							   vid.width, vid.height,
							   0, // borderwidth
							   x_visinfo->depth,
							   InputOutput,
							   x_vis,
							   attribmask,
							   &attribs);
							   
		if (x_visinfo->class != TrueColor)
			XFreeColormap (x_disp, tmpcmap);
			
	}
	
	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);
		}
		
	}
	
	VID_SetWindowTitle (x_win, "Quake");
	
// 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;
		ResetSharedFrameBuffers();
	}
	else
		ResetFrameBuffer();
		
	current_framebuffer = 0;
	vid.rowbytes = x_framebuffer[0]->bytes_per_line;
	vid.buffer = x_framebuffer[0]->data;
	vid.conbuffer = x_framebuffer[0]->data;
	vid.conrowbytes = vid.rowbytes;
	vid.conwidth = vid.width;
	vid.conheight = vid.height;
	
	vid.maxwarpwidth = WARP_WIDTH;
	vid.maxwarpheight = WARP_HEIGHT;
	
	D_InitCaches (surfcache, sizeof (surfcache));
	
//	XSynchronize(x_disp, False);

	vid_menudrawfn = VID_MenuDraw;
	vid_menukeyfn = VID_MenuKey;
	
}

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]] * 257;
			colors[i].green = vid_gamma[palette[i*3+1]] * 257;
			colors[i].blue = vid_gamma[palette[i*3+2]] * 257;
		}
		XStoreColors (x_disp, x_cmap, colors, 256);
	}
	
}

// Called at shutdown

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

int XLateKey (XKeyEvent *ev)
{

	int key;
	char buf[64];
	KeySym keysym;
	
	XLookupString (ev, buf, sizeof buf, &keysym, 0);
	
	switch (keysym)
	{
		case XK_Page_Up:
			key = K_PGUP;
			break;
		case XK_Page_Down:
			key = K_PGDN;
			break;
		case XK_Home:
			key = K_HOME;
			break;
		case XK_End:
			key = K_END;
			break;
		case XK_Left:
			key = K_LEFTARROW;
			break;
		case XK_Right:
			key = K_RIGHTARROW;
			break;
		case XK_Down:
			key = K_DOWNARROW;
			break;
		case XK_Up:
			key = K_UPARROW;
			break;
		case XK_Escape:
			key = K_ESCAPE;
			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:
		case XK_Delete:
			key = K_BACKSPACE;
			break;
		case XK_Pause:
			key = K_PAUSE;
			break;
		case XK_Shift_L:
		case XK_Shift_R:
			key = K_SHIFT;
			break;
		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;
// various other keys on the keyboard
		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;
		case XK_KP_Insert:
			key = K_INS;
			break;
			
		default:
			key = *buf;
			break;
	}
	
	return key;
	
}

struct
{
	int key;
	int down;
} keyq[64];
int keyq_head = 0;
int keyq_tail = 0;

int config_notify = 0;
int config_notify_width;
int config_notify_height;

void GetEvent (void)
{
	XEvent x_event;
	
	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:
			//printf( "button %d down\n", x_event.xbutton.button );
			Key_Event (K_MOUSE1 + x_event.xbutton.button - 1, true);
			break;
		case ButtonRelease:
			//printf( "button %d up\n", x_event.xbutton.button );
			Key_Event (K_MOUSE1 + x_event.xbutton.button - 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:
//			printf("config notify\n");
			config_notify_width = x_event.xconfigure.width;
			config_notify_height = x_event.xconfigure.height;
			config_notify = 1;
			sb_updates = 0;
			break;
		case Expose:
			sb_updates = 0;
			break;
		case ClientMessage:
			if (x_event.xclient.data.l[0] == aWMDelete) Host_Quit_f();
			break;
		case EnterNotify:
			mouse_in_window = true;
			break;
		case LeaveNotify:
			mouse_in_window = false;
			break;
			
		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 0
	static int count;
	static long long s;
	long long gethrtime();
	
	if (count == 0)
		s = gethrtime();
		
	if (count++ == 50)
	{
		count = 1;
		printf ("%lf frames/secs\n", 50.0 / ( (double) (gethrtime() - s) / 1e9));
		s = gethrtime();
	}
#endif
	
// if the window changes dimension, skip this frame

	if (config_notify)
	{
		printf ("config notify\n");
		config_notify = 0;
		vid.width = config_notify_width & ~3;
		vid.height = config_notify_height;
		
		printf ("w = %d, h = %d\n", vid.width, vid.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
		return;
	}
	
	if (doShm)
	{
//		long long s, gethrtime();
//		s = gethrtime();

		while (rects)
		{
			printf ("update: %d,%d (%d,%d)\n", rects->x, rects->y, rects->width, rects->height);
			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;
		}
//		printf("%lf\n", (double)(gethrtime()-s)/1.0e9);
		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 VID_SetDefaultMode (void)
{
}

int I_OpenWindow (void)
{
	return 0;
}

void I_EraseWindow (int window)
{
}

void I_DrawCircle (int window, int x, int y, int r)
{
}

void I_DisplayWindow (int window)
{
}

void Sys_SendKeyEvents (void)
{
// get events from x server
	if (x_disp)
	{
		while (XPending (x_disp)) GetEvent();
		while (keyq_head != keyq_tail)
		{
			Key_Event (keyq[keyq_tail].key, keyq[keyq_tail].down);
			keyq_tail = (keyq_tail + 1) & 63;
		}
	}
}

#if 0
char *Sys_ConsoleInput (void)
{

	static char	text[256];
	int		len;
	fd_set  readfds;
	int		ready;
	struct timeval timeout;
	
	timeout.tv_sec = 0;
	timeout.tv_usec = 0;
	FD_ZERO (&readfds);
	FD_SET (0, &readfds);
	ready = select (1, &readfds, 0, 0, &timeout);
	
	if (ready > 0)
	{
		len = read (0, text, sizeof (text));
		if (len >= 1)
		{
			text[len-1] = 0;	// rip off the /n and terminate
			return text;
		}
	}
	
	return 0;
	
}
#endif

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)
{
	int i;
	
	if (!mouse_avail) return;
	
	for (i = 0 ; i < mouse_buttons ; i++)
	{
		if ( (mouse_buttonstate & (1 << i)) && ! (mouse_oldbuttonstate & (1 << i)))
			Key_Event (K_MOUSE1 + i, true);
			
		if (! (mouse_buttonstate & (1 << i)) && (mouse_oldbuttonstate & (1 << i)))
			Key_Event (K_MOUSE1 + i, false);
	}
	mouse_oldbuttonstate = mouse_buttonstate;
}

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;
}
