/*
	gl_vidlinux_x11.c

	(description)

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#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 <asm/io.h>

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

#include "GL/gl.h"
#include "GL/glx.h"

#include "quakedef.h"

#define WARP_WIDTH              320
#define WARP_HEIGHT             200

static Display *dpy = NULL;
static Window win;
static GLXContext ctx = NULL;

unsigned short d_8to16table[256];
unsigned int d_8to24table[256];
unsigned char d_15to8table[65536];

static qboolean usedga = false;

#define stringify(m) { #m, m }

cvar_t vid_mode = {"vid_mode","0",false};
 
cvar_t  mouse_button_commands[3] =
{
    {"mouse1","+attack"},
    {"mouse2","+strafe"},
    {"mouse3","+forward"},
};

static int mouse_buttons=3;
static int mouse_buttonstate;
static int mouse_oldbuttonstate;
static float mouse_x, mouse_y;
static float p_mouse_x, p_mouse_y;
static float old_mouse_x, old_mouse_y;

cvar_t _windowed_mouse = {"_windowed_mouse", "1", true};
cvar_t m_filter = {"m_filter","0"};
static float old_windowed_mouse;

static int scr_width, scr_height;

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

/*-----------------------------------------------------------------------*/

//int		texture_mode = GL_NEAREST;
//int		texture_mode = GL_NEAREST_MIPMAP_NEAREST;
//int		texture_mode = GL_NEAREST_MIPMAP_LINEAR;
int		texture_mode = GL_LINEAR;
//int		texture_mode = GL_LINEAR_MIPMAP_NEAREST;
//int		texture_mode = GL_LINEAR_MIPMAP_LINEAR;

int		texture_extension_number = 1;

float		gldepthmin, gldepthmax;

cvar_t	gl_ztrick = {"gl_ztrick","1"};

const char *gl_vendor;
const char *gl_renderer;
const char *gl_version;
const char *gl_extensions;

qboolean is8bit = false;
qboolean isPermedia = false;
qboolean gl_mtexable = false;

/*-----------------------------------------------------------------------*/
void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
}

void D_EndDirectRect (int x, int y, int width, int height)
{
}

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

Keybinding command
=================
*/
void VID_Gamma_f (void)
{
	float	gamma, f, inf;
	unsigned char	palette[768];
	int		i;

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

		for (i=0 ; i<768 ; i++)
		{
			f = pow ( (host_basepal[i]+1)/256.0 , gamma );
			inf = f*255 + 0.5;
			if (inf < 0)
				inf = 0;
			if (inf > 255)
				inf = 255;
			palette[i] = inf;
		}

		VID_SetPalette (palette);

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

void VID_Shutdown(void)
{
	if (!ctx)
		return;

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

	glXDestroyContext(dpy,ctx);

#ifdef USE_DGA
	if (usedga)
		XF86DGADirectVideo(dpy,DefaultScreen(dpy),0);
#endif
}

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:
		case XK_Page_Up:	 key = K_PGUP; break;

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

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

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

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

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

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

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

		case XK_Escape: key = K_ESCAPE;		break;

		case XK_KP_Enter:
		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:
		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_AUX30;	break;

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

		case XK_KP_Multiply: key = '*'; break;
		case XK_KP_Add: key = '+'; break;
		case XK_KP_Subtract: key = '-'; break;
		case XK_KP_Divide: key = '/'; 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';
//			fprintf(stdout, "case 0x0%x: key = ___;break;/* [%c] */\n", keysym);
			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;
						      
qboolean Keyboard_Update(void)
{
	XEvent x_event;
   
	if(!XCheckMaskEvent(dpy,KEY_MASK,&x_event))
		return false;

	switch(x_event.type) {
	case KeyPress:
		keyq[keyq_head].key = XLateKey(&x_event.xkey);
		keyq[keyq_head].down = true;
		keyq_head = (keyq_head + 1) & 63;
		break;
	case KeyRelease:
		keyq[keyq_head].key = XLateKey(&x_event.xkey);
		keyq[keyq_head].down = false;
		keyq_head = (keyq_head + 1) & 63;
		break;
	}

	return true;
}

qboolean Mouse_Update(void)
{
	XEvent x_event;
	int b;
   
	if(!XCheckMaskEvent(dpy,MOUSE_MASK,&x_event))
		return false;

	switch(x_event.type) {
	case MotionNotify:
		if (usedga) {
			mouse_x += x_event.xmotion.x_root;
			mouse_y += x_event.xmotion.y_root;
		} else if (_windowed_mouse.value) {
			mouse_x += (float) ((int)x_event.xmotion.x - (int)(scr_width/2));
			mouse_y += (float) ((int)x_event.xmotion.y - (int)(scr_height/2));

			/* move the mouse to the window center again */
			XSelectInput(dpy,win, (KEY_MASK | MOUSE_MASK) & ~PointerMotionMask);
			XWarpPointer(dpy,None,win,0,0,0,0, (scr_width/2),(scr_height/2));
			XSelectInput(dpy,win, KEY_MASK | MOUSE_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 ButtonPress:
		b=-1;
		if (x_event.xbutton.button == 1)
			b = 0;
		else if (x_event.xbutton.button == 2)
			b = 2;
		else if (x_event.xbutton.button == 3)
			b = 1;
		if (b>=0)
			mouse_buttonstate |= 1<<b;
		break;

	case ButtonRelease:
		b=-1;
		if (x_event.xbutton.button == 1)
			b = 0;
		else if (x_event.xbutton.button == 2)
			b = 2;
		else if (x_event.xbutton.button == 3)
			b = 1;
		if (b>=0)
			mouse_buttonstate &= ~(1<<b);
		break;
	}
   
	if (old_windowed_mouse != _windowed_mouse.value) {
		old_windowed_mouse = _windowed_mouse.value;

		if (!_windowed_mouse.value) {
			/* ungrab the pointer */
			Con_Printf("Releasing mouse.\n");

			XUngrabPointer(dpy,CurrentTime);
			XUngrabKeyboard(dpy,CurrentTime);
		} else {
			/* grab the pointer */
			Con_Printf("Grabbing mouse.\n");

			XGrabPointer(dpy,win,False,MOUSE_MASK,GrabModeAsync,
				GrabModeAsync,win,None,CurrentTime);
			XWarpPointer(dpy,None,win, 0,0,0,0, scr_width/2, scr_height/2);
			XGrabKeyboard(dpy,win,
				False,
				GrabModeAsync,GrabModeAsync,
				CurrentTime);

			//XSync(dpy,True);
		}
	}
	return true;
}

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

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);
}

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

void	VID_SetPalette (unsigned char *palette)
{
	byte	*pal;
	unsigned short r,g,b;
	int     v;
	int     r1,g1,b1;
	int		k;
	unsigned short i;
	unsigned	*table;
	FILE *f;
	char s[255];
	float dist, bestdist;
	static qboolean palflag = false;

//
// 8 8 8 encoding
//
	pal = palette;
	table = d_8to24table;
	for (i=0 ; i<256 ; i++)
	{
		r = pal[0];
		g = pal[1];
		b = pal[2];
		pal += 3;
		
//		v = (255<<24) + (r<<16) + (g<<8) + (b<<0);
//		v = (255<<0) + (r<<8) + (g<<16) + (b<<24);
		v = (255<<24) + (r<<0) + (g<<8) + (b<<16);
		*table++ = v;
	}
	d_8to24table[255] &= 0xffffff;	// 255 is transparent

	// JACK: 3D distance calcs - k is last closest, l is the distance.
	// FIXME: Precalculate this and cache to disk.
	if (palflag)
		return;
	palflag = true;

	COM_FOpenFile("glquake/15to8.pal", &f);
	if (f) {
		fread(d_15to8table, 1<<15, 1, f);
		fclose(f);
	} else {
		for (i=0; i < (1<<15); i++) {
			/* Maps
 			000000000000000
 			000000000011111 = Red  = 0x1F
 			000001111100000 = Blue = 0x03E0
 			111110000000000 = Grn  = 0x7C00
 			*/
 			r = ((i & 0x1F) << 3)+4;
 			g = ((i & 0x03E0) >> 2)+4;
 			b = ((i & 0x7C00) >> 7)+4;
			pal = (unsigned char *)d_8to24table;
			for (v=0,k=0,bestdist=10000.0; v<256; v++,pal+=4) {
 				r1 = (int)r - (int)pal[0];
 				g1 = (int)g - (int)pal[1];
 				b1 = (int)b - (int)pal[2];
				dist = sqrt(((r1*r1)+(g1*g1)+(b1*b1)));
				if (dist < bestdist) {
					k=v;
					bestdist = dist;
				}
			}
			d_15to8table[i]=k;
		}
		sprintf(s, "%s/glquake", com_gamedir);
 		Sys_mkdir (s);
		sprintf(s, "%s/glquake/15to8.pal", com_gamedir);
		if ((f = fopen(s, "wb")) != NULL) {
			fwrite(d_15to8table, 1<<15, 1, f);
			fclose(f);
		}
	}
}

/*
===============
GL_Init
===============
*/
void GL_Init (void)
{
	gl_vendor = glGetString (GL_VENDOR);
	Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
	gl_renderer = glGetString (GL_RENDERER);
	Con_Printf ("GL_RENDERER: %s\n", gl_renderer);

	gl_version = glGetString (GL_VERSION);
	Con_Printf ("GL_VERSION: %s\n", gl_version);
	gl_extensions = glGetString (GL_EXTENSIONS);
	Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);

//	Con_Printf ("%s %s\n", gl_renderer, gl_version);

	glClearColor (1,0,0,0);
	glCullFace(GL_FRONT);
	glEnable(GL_TEXTURE_2D);

	glEnable(GL_ALPHA_TEST);
	glAlphaFunc(GL_GREATER, 0.666);

	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	glShadeModel (GL_FLAT);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

//	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}

/*
=================
GL_BeginRendering

=================
*/
void GL_BeginRendering (int *x, int *y, int *width, int *height)
{
	extern cvar_t gl_clear;

	*x = *y = 0;
	*width = scr_width;
	*height = scr_height;

//    if (!wglMakeCurrent( maindc, baseRC ))
//		Sys_Error ("wglMakeCurrent failed");

//	glViewport (*x, *y, *width, *height);
}


void GL_EndRendering (void)
{
	glFlush();
	glXSwapBuffers(dpy,win);
}

qboolean VID_Is8bit(void)
{
	return is8bit;
}

#ifdef GL_EXT_SHARED
void VID_Init8bitPalette() 
{
	// Check for 8bit Extensions and initialize them.
	int i;
	char thePalette[256*3];
	char *oldPalette, *newPalette;

	if (strstr(gl_extensions, "GL_EXT_shared_texture_palette") == NULL)
		return;

	Con_SafePrintf("8-bit GL extensions enabled.\n");
	glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
	oldPalette = (char *) d_8to24table; //d_8to24table3dfx;
	newPalette = thePalette;
	for (i=0;i<256;i++) {
		*newPalette++ = *oldPalette++;
		*newPalette++ = *oldPalette++;
		*newPalette++ = *oldPalette++;
		oldPalette++;
	}
	glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
	is8bit = true;
}

#else
extern void gl3DfxSetPaletteEXT(GLuint *pal);

void VID_Init8bitPalette(void) 
{
	// Check for 8bit Extensions and initialize them.
	int i;
	GLubyte table[256][4];
	char *oldpal;

	if (strstr(gl_extensions, "3DFX_set_global_palette") == NULL)
		return;

	Con_SafePrintf("8-bit GL extensions enabled.\n");
	glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
	oldpal = (char *) d_8to24table; //d_8to24table3dfx;
	for (i=0;i<256;i++) {
		table[i][2] = *oldpal++;
		table[i][1] = *oldpal++;
		table[i][0] = *oldpal++;
		table[i][3] = 255;
		oldpal++;
	}
	gl3DfxSetPaletteEXT((GLuint *)table);
	is8bit = true;
}
#endif

void VID_Init(unsigned char *palette)
{
	int i;
	char	gldir[MAX_OSPATH];
	int width = 640, height = 480;
	int attrib[] = { 
		GLX_RGBA,
		GLX_RED_SIZE, 1,
		GLX_GREEN_SIZE, 1,
		GLX_BLUE_SIZE, 1,
		GLX_DOUBLEBUFFER,
		GLX_DEPTH_SIZE, 1,
		None };
	int scrnum;
	XSetWindowAttributes attr;
	unsigned long mask;
	Window root;
	XVisualInfo *visinfo;

	S_Init();

	Cvar_RegisterVariable (&vid_mode);
	Cvar_RegisterVariable (&gl_ztrick);
	
	vid.maxwarpwidth = WARP_WIDTH;
	vid.maxwarpheight = WARP_HEIGHT;
	vid.colormap = host_colormap;
	vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));

// interpret command-line params

// set vid parameters

	if ((i = COM_CheckParm("-width")) != 0)
		width = atoi(com_argv[i+1]);
	if ((i = COM_CheckParm("-height")) != 0)
		height = atoi(com_argv[i+1]);

	if ((i = COM_CheckParm("-conwidth")) != 0)
		vid.conwidth = Q_atoi(com_argv[i+1]);
	else
		vid.conwidth = 640;

	vid.conwidth &= 0xfff8; // make it a multiple of eight

	if (vid.conwidth < 320)
		vid.conwidth = 320;

	// pick a conheight that matches with correct aspect
	vid.conheight = vid.conwidth*3 / 4;

	if ((i = COM_CheckParm("-conheight")) != 0)
		vid.conheight = Q_atoi(com_argv[i+1]);
	if (vid.conheight < 200)
		vid.conheight = 200;

	if (!(dpy = XOpenDisplay(NULL))) {
		fprintf(stderr, "Error couldn't open the X display\n");
		exit(1);
	}

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

	visinfo=glXChooseVisual(dpy,scrnum,attrib);
	if (!visinfo) {
		fprintf(stderr, "Error couldn't get an RGB, Double-buffered, Depth visual\n");
		exit(1);
	}

	/* window attributes */
	attr.background_pixel=0;
	attr.border_pixel=0;
	attr.colormap=XCreateColormap(dpy,root,visinfo->visual,AllocNone);
	attr.event_mask=KEY_MASK|MOUSE_MASK|VisibilityChangeMask;
	mask=CWBackPixel|CWBorderPixel|CWColormap|CWEventMask;

	win=XCreateWindow(dpy,root,0,0,width,height,
			0,visinfo->depth,InputOutput,
			visinfo->visual,mask,&attr);
	XMapWindow(dpy,win);

	XMoveWindow(dpy,win,0,0);

	XFlush(dpy);

	if (COM_CheckParm("-window"))
		putenv("MESA_GLX_FX=window");
	else
		putenv("MESA_GLX_FX=fullscreen");

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

	if (!ctx) {
		fprintf(stderr, "Unable to create glX context.\n");
		exit(1);
	}

	glXMakeCurrent(dpy,win,ctx);

	scr_width = width;
	scr_height = height;

	if (vid.conheight > height)
		vid.conheight = height;
	if (vid.conwidth > width)
		vid.conwidth = width;
	vid.width = vid.conwidth;
	vid.height = vid.conheight;

	vid.aspect = ((float)vid.height / (float)vid.width) *
				(320.0 / 240.0);
	vid.numpages = 2;

	InitSig(); // trap evil signals

	GL_Init();

	sprintf (gldir, "%s/glquake", com_gamedir);
	Sys_mkdir (gldir);

	VID_SetPalette(palette);

	// Check for 3DFX Extensions and initialize them.
	VID_Init8bitPalette();

	Con_SafePrintf ("Video mode %dx%d initialized.\n", width, height);

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

void Sys_SendKeyEvents(void)
{
	if (dpy)
	{
		while (Keyboard_Update())
			;

		while (keyq_head != keyq_tail)
		{
			Key_Event(keyq[keyq_tail].key, keyq[keyq_tail].down);
			keyq_tail = (keyq_tail + 1) & 63;
		}
	}
}

void Force_CenterView_f (void)
{
	cl.viewangles[PITCH] = 0;
}


void IN_Init(void)
{
	Cvar_RegisterVariable (&_windowed_mouse);
	Cvar_RegisterVariable (&m_filter);
	Cvar_RegisterVariable (&mouse_button_commands[0]);
	Cvar_RegisterVariable (&mouse_button_commands[1]);
	Cvar_RegisterVariable (&mouse_button_commands[2]);
	Cmd_AddCommand ("force_centerview", Force_CenterView_f);
}

void IN_Shutdown(void)
{
}

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

	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;
}

/*
===========
IN_Move
===========
*/
void IN_Move (usercmd_t *cmd)
{
	while (Mouse_Update())
		;

	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_LockBuffer (void) {}
void	VID_UnlockBuffer (void) {}