newtree/source/vid_glx.c

/*
	vid_glx.c

	OpenGL GLX video driver

	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

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <signal.h>
#include <math.h>

#include "bothdefs.h"   // needed by: common.h, net.h, client.h

#include "quakedef.h"

#include "bspfile.h"    // needed by: glquake.h
#include "vid.h"
#include "sys.h"
#include "zone.h"       // needed by: client.h, gl_model.h
#include "mathlib.h"    // needed by: protocol.h, render.h, client.h,
                        //  modelgen.h, glmodel.h
#include "wad.h"
#include "draw.h"
#include "cvar.h"
#include "net.h"        // needed by: client.h
#include "protocol.h"   // needed by: client.h
#include "cmd.h"
#include "keys.h"
#include "sbar.h"
#include "sound.h"
#include "render.h"     // needed by: client.h, gl_model.h, glquake.h
#include "client.h"     // need cls in this file
#include "model.h"   // needed by: glquake.h
#include "console.h"
#include "glquake.h"
#include "qendian.h"
#include "qargs.h"
#include "compat.h"

#include <GL/glx.h>

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

#ifdef USE_DGA
#include <X11/extensions/xf86dga.h>
#endif


#define WARP_WIDTH              320
#define WARP_HEIGHT             200

extern    byte            *host_colormap;
extern qboolean noclip_anglehack;

static Display *x_disp = NULL;
static Window x_win;
static GLXContext ctx = NULL;

static float old_windowed_mouse = 0;

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

#define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask)

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

cvar_t	*_windowed_mouse;
cvar_t	*vid_mode;
 
static float   mouse_x, mouse_y;
static float	old_mouse_x, old_mouse_y;

cvar_t	*m_filter;

static int scr_width, scr_height;

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

//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"};
 CVAR_FIXME */
cvar_t	*gl_ztrick;

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

qboolean is8bit = 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)
{
}

/*
========================================================================
Create an empty cursor
========================================================================
*/

static Cursor	nullcursor = None;

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

	if (nullcursor != None) return nullcursor;

	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;
	nullcursor = XCreatePixmapCursor(display, cursormask, cursormask,
									 &dummycolour,&dummycolour, 0,0);
	XFreePixmap(display,cursormask);
	XFreeGC(display,gc);

	return nullcursor;
}

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:	 
		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 = '5';	break;

		case XK_KP_Insert: 
		case XK_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';
			break;
	} 

	return key;
}

static void install_grabs(void)
{
	XGrabPointer(x_disp, x_win,
				 True,
				 0,
				 GrabModeAsync, GrabModeAsync,
				 x_win,
				 None,
				 CurrentTime);

#ifdef USE_DGA
	XF86DGADirectVideo(x_disp, DefaultScreen(x_disp), XF86DGADirectMouse);
	dgamouse = 1;
#else
	XWarpPointer(x_disp, None, x_win,
				 0, 0, 0, 0,
				 vid.width / 2, vid.height / 2);
#endif

	XGrabKeyboard(x_disp, x_win,
				  False,
				  GrabModeAsync, GrabModeAsync,
				  CurrentTime);

//	XSync(x_disp, True);
}

static void uninstall_grabs(void)
{
#ifdef USE_DGA
	XF86DGADirectVideo(x_disp, DefaultScreen(x_disp), 0);
	dgamouse = 0;
#endif

	XUngrabPointer(x_disp, CurrentTime);
	XUngrabKeyboard(x_disp, CurrentTime);

//	XSync(x_disp, True);
}

static void GetEvent(void)
{
	XEvent event;
	int b;

	if (!x_disp)
		return;

	XNextEvent(x_disp, &event);

	switch (event.type) {
	case KeyPress:
	case KeyRelease:
		Key_Event(XLateKey(&event.xkey), event.type == KeyPress);
		break;

	case MotionNotify:
#ifdef USE_DGA
/* 		if (dgamouse && _windowed_mouse.value) {
 CVAR_FIXME */
		if (dgamouse && _windowed_mouse->value) {
			mouse_x = event.xmotion.x_root;
			mouse_y = event.xmotion.y_root;
		} else
#endif
		{
/* 			if (_windowed_mouse.value) {
 CVAR_FIXME */
			if (_windowed_mouse->value) {
				mouse_x = (float) ((int)event.xmotion.x - (int)(vid.width/2));
				mouse_y = (float) ((int)event.xmotion.y - (int)(vid.height/2));

				/* move the mouse to the window center again */
				XSelectInput(x_disp, x_win, X_MASK & ~PointerMotionMask);
				XWarpPointer(x_disp, None, x_win, 0, 0, 0, 0, 
					(vid.width/2), (vid.height/2));
				XSelectInput(x_disp, x_win, X_MASK);
			}
		}
		break;

	case ButtonPress:
		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;
		if (b>=0)
			Key_Event(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;
		if (b>=0)
			Key_Event(K_MOUSE1 + b, false);
		break;
	}

/* 	if (old_windowed_mouse != _windowed_mouse.value) {
 CVAR_FIXME */
	if (old_windowed_mouse != _windowed_mouse->value) {
/* 		old_windowed_mouse = _windowed_mouse.value;
 CVAR_FIXME */
		old_windowed_mouse = _windowed_mouse->value;

/* 		if (!_windowed_mouse.value) {
 CVAR_FIXME */
		if (!_windowed_mouse->value) {
			/* ungrab the pointer */
			uninstall_grabs();
		} else {
			/* grab the pointer */
			install_grabs();
		}
	}
}


void VID_Shutdown(void)
{
	Con_Printf("VID_Shutdown\n");
	if (ctx) {
		glXDestroyContext(x_disp, ctx);
	}
	if (nullcursor != None) {
		XFreeCursor(x_disp, nullcursor);
		nullcursor = None;
	}
	XCloseDisplay(x_disp);
}

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

void InitSig(void)
{
#if 0
	signal(SIGHUP, signal_handler);
	signal(SIGINT, 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);
#endif
}

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

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

//
// 8 8 8 encoding
//
//	Con_DPrintf("Converting 8to24\n");

	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) {
		Qread(f, d_15to8table, 1<<15);
		Qclose(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;
		}
		snprintf (s, sizeof(s), "%s/glquake", com_gamedir);
 		Sys_mkdir (s);
		snprintf (s, sizeof(s), "%s/glquake/15to8.pal", com_gamedir);
		if ((f = Qopen(s, "wb")) != NULL) {
			Qwrite(f, d_15to8table, 1<<15);
			Qclose(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);

/* glShadeMode(GL_SMOOTH) should look better then GL_FLAT but
   I don't know if it looks any better, sure is slower
	glShadeModel (GL_SMOOTH);
*/
	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)
{
	*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(x_disp, x_win);
}

qboolean VID_Is8bit(void)
{
	return is8bit;
}

#ifdef GLX_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

void VID_Init8bitPalette(void)
{
}

#if 0
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

#endif

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


	vid_mode = Cvar_Get("vid_mode", "0", CVAR_NONE, "None");
	gl_ztrick = Cvar_Get("gl_ztrick", "0", CVAR_NONE, "None");
	_windowed_mouse = Cvar_Get("_windowed_mouse", "0", CVAR_ARCHIVE, "None");
	
	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 = atoi(com_argv[i+1]);
	else
		vid.conwidth = width;

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

	vid.conwidth = max(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 = max(atoi(com_argv[i+1]), 200);

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

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

	visinfo = glXChooseVisual(x_disp, scrnum, attrib);
	if (!visinfo) {
		fprintf(stderr, "qkHack: 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(x_disp, root, visinfo->visual, AllocNone);
	attr.event_mask = X_MASK;
	mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;

	x_win = XCreateWindow(x_disp, root, 0, 0, width, height,
						0, visinfo->depth, InputOutput,
						visinfo->visual, mask, &attr);
	/* Invisible Cursor */
	XDefineCursor(x_disp, x_win, CreateNullCursor(x_disp, x_win));

	/* Map the window */
	XMapWindow(x_disp, x_win);

	XMoveWindow(x_disp, x_win, 0, 0);

	XFlush(x_disp);

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

	glXMakeCurrent(x_disp, x_win, ctx);

	scr_width = width;
	scr_height = height;

	vid.height = vid.conheight = min(height, vid.conheight);
	vid.width = vid.conwidth = min(width, vid.conwidth);

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

	InitSig(); // trap evil signals

	GL_Init();

	snprintf (gldir, sizeof(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 (x_disp) {
		while (XPending(x_disp)) 
			GetEvent();
	}
}

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

void IN_Init(void)
{
}

void IN_Shutdown(void)
{
}

/*
===========
IN_Commands
===========
*/
void IN_Commands (void)
{
}

/*
===========
IN_Move
===========
*/
void IN_MouseMove (usercmd_t *cmd)
{
	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;

// add mouse X/Y movement to cmd
	if ( (in_strafe.state & 1) || (lookstrafe->value && freelook ))
		cmd->sidemove += m_side->value * mouse_x;
	else
		cl.viewangles[YAW] -= m_yaw->value * mouse_x;
	
	if (freelook)
		V_StopPitchDrift ();
		
	if ( freelook && !(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 IN_Move (usercmd_t *cmd)
{
	IN_MouseMove(cmd);
}

void VID_InitCvars ()
{
	m_filter = Cvar_Get("m_filter", "0", CVAR_NONE, "None");
}

void VID_UnlockBuffer() {}
void VID_LockBuffer() {}