newtree/source/gl_screen.c

/*
	gl_screen.c

	master for refresh, status bar, console, chat, notify, etc

	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 <time.h>

#include "cl_parse.h"
#include "cmd.h"
#include "console.h"
#include "draw.h"
#include "glquake.h"
#include "keys.h"
#include "menu.h"
#include "pcx.h"
#include "qendian.h"
#include "sbar.h"
#include "skin.h"
#include "sys.h"
#include "view.h"

/*

background clear
rendering
turtle/net/ram icons
sbar
centerprint / slow centerprint
notify lines
intermission / finale overlay
loading plaque
console
menu

required background clears
required update regions


syncronous draw mode or async
One off screen buffer, with updates either copied or xblited
Need to double buffer?


async draw will require the refresh area to be cleared, because it will be
xblited, but sync draw can just ignore it.

sync
draw

CenterPrint ()
SlowPrint ()
Screen_Update ();
Con_Printf ();

net 
turn off messages option

the refresh is allways rendered, unless the console is full screen


console is:
	notify lines
	half
	full
	

*/

extern byte 	*host_basepal;
extern double	host_frametime;
extern double	realtime;
int 			glx, gly, glwidth, glheight;

// only the refresh window will be updated unless these variables are flagged 
int 			scr_copytop;
int 			scr_copyeverything;

float			scr_con_current;
float			scr_conlines;           // lines of console to display

float			oldscreensize, oldfov;
cvar_t			*scr_viewsize;
cvar_t			*scr_fov; // 10 - 170
cvar_t			*scr_conspeed;
cvar_t			*scr_centertime;
cvar_t			*scr_showturtle;
cvar_t			*scr_showpause;
cvar_t			*scr_printspeed;
cvar_t			*gl_triplebuffer;
cvar_t			*crosshair;
cvar_t			*crosshaircolor;
cvar_t			*cl_crossx;
cvar_t			*cl_crossy;

qboolean		scr_initialized;                // ready to draw

qpic_t			*scr_ram;
qpic_t			*scr_net;
qpic_t			*scr_turtle;

int 			scr_fullupdate;

int 			clearconsole;
int 			clearnotify;

extern int		sb_lines;

viddef_t		vid;                            // global video state

vrect_t 		scr_vrect;

qboolean		scr_disabled_for_loading;
float			scr_disabled_time;

qboolean		block_drawing;

void SCR_ScreenShot_f (void);
void SCR_RSShot_f (void);

/*
===============================================================================

CENTER PRINTING

===============================================================================
*/

char			scr_centerstring[1024];
float			scr_centertime_start;   // for slow victory printing
float			scr_centertime_off;
int 			scr_center_lines;
int 			scr_erase_lines;
int 			scr_erase_center;

/*
==============
SCR_CenterPrint

Called for important messages that should stay in the center of the screen
for a few moments
==============
*/
void SCR_CenterPrint (char *str)
{
	strncpy (scr_centerstring, str, sizeof(scr_centerstring)-1);
	scr_centertime_off = scr_centertime->value;
	scr_centertime_start = cl.time;

	// count the number of lines for centering
	scr_center_lines = 1;
	while (*str) {
		if (*str == '\n')
			scr_center_lines++;
		str++;
	}
}


void SCR_DrawCenterString (void)
{
	char	*start;
	int 	l;
	int 	j;
	int 	x, y;
	int 	remaining;

	// the finale prints the characters one at a time
	if (cl.intermission)
		remaining = scr_printspeed->value * (cl.time - scr_centertime_start);
	else
		remaining = 9999;

	scr_erase_center = 0;
	start = scr_centerstring;

	if (scr_center_lines <= 4)
		y = vid.height*0.35;
	else
		y = 48;

	do {	// scan the width of the line
		for (l = 0; l < 40; l++)
			if (start[l] == '\n' || !start[l])
				break;
		x = (vid.width - l*8)/2;
		for (j = 0; j < l; j++, x += 8) {
			Draw_Character8 (x, y, start[j]);        
			if (!remaining--)
				return;
		}
			
		y += 8;

		while (*start && *start != '\n')
			start++;

		if (!*start)
			break;
		start++;                // skip the \n
	} while (1);
}

void SCR_CheckDrawCenterString (void)
{
	scr_copytop = 1;
	if (scr_center_lines > scr_erase_lines)
		scr_erase_lines = scr_center_lines;

	scr_centertime_off -= host_frametime;
	
	if (scr_centertime_off <= 0 && !cl.intermission)
		return;
	if (key_dest != key_game)
		return;

	SCR_DrawCenterString ();
}

//=============================================================================

/*
====================
CalcFov
====================
*/
float CalcFov (float fov_x, float width, float height)
{
        float   a;
        float   x;

        if (fov_x < 1 || fov_x > 179)
                Sys_Error ("Bad fov: %f", fov_x);

        x = width/tan(fov_x/360*M_PI);

        a = (x == 0) ? 90 : atan(height/x); // 0 shouldn't happen

        a = a*360/M_PI;

        return a;
}

/*
	SCR_CalcRefdef

	Must be called whenever vid changes
	Internal use only
*/
static void
SCR_CalcRefdef (void)
{
	float           size;
	int             h;
	qboolean		full = false;


	scr_fullupdate = 0;             // force a background redraw
	vid.recalc_refdef = 0;

// force the status bar to redraw
	Sbar_Changed ();

//========================================
	
// bound viewsize
	Cvar_SetValue (scr_viewsize, bound (30, scr_viewsize->int_val, 120));

// bound field of view
	Cvar_SetValue (scr_fov, bound (10, scr_fov->value, 170));

	if (scr_viewsize->int_val >= 120)
		sb_lines = 0;           // no status bar at all
	else if (scr_viewsize->int_val >= 110)
		sb_lines = 24;          // no inventory
	else
		sb_lines = 24+16+8;

	if (scr_viewsize->int_val >= 100) {
		full = true;
		size = 100.0;
	} else {
		size = scr_viewsize->int_val;
	}
	// intermission is always full screen   
	if (cl.intermission) {
		full = true;
		size = 100.0;
		sb_lines = 0;
	}
	size /= 100.0;

	if (!cl_sbar->int_val && full)
		h = vid.height;
	else
		h = vid.height - sb_lines;

	r_refdef.vrect.width = vid.width * size + 0.5;
	if (r_refdef.vrect.width < 96) {
		size = 96.0 / r_refdef.vrect.width;
		r_refdef.vrect.width = 96;      // min for icons
	}

	r_refdef.vrect.height = vid.height * size + 0.5;
	if (cl_sbar->int_val || !full) {
  		if (r_refdef.vrect.height > vid.height - sb_lines)
  			r_refdef.vrect.height = vid.height - sb_lines;
	} else if (r_refdef.vrect.height > vid.height)
			r_refdef.vrect.height = vid.height;
	r_refdef.vrect.x = (vid.width - r_refdef.vrect.width)/2;
	if (full)
		r_refdef.vrect.y = 0;
	else 
		r_refdef.vrect.y = (h - r_refdef.vrect.height)/2;

	r_refdef.fov_x = scr_fov->value;
	r_refdef.fov_y = CalcFov (r_refdef.fov_x, r_refdef.vrect.width, r_refdef.vrect.height);

	scr_vrect = r_refdef.vrect;
}


/*
	SCR_SizeUp_f

	Keybinding command
*/
void
SCR_SizeUp_f (void)
{
	Cvar_SetValue (scr_viewsize, scr_viewsize->int_val+10);
}


/*
	SCR_SizeDown_f

	Keybinding command
*/
void
SCR_SizeDown_f (void)
{
	Cvar_SetValue (scr_viewsize, scr_viewsize->int_val-10);
}

//============================================================================

/*
==================
SCR_Init
==================
*/
void SCR_Init_Cvars (void)
{
	scr_fov = Cvar_Get("fov", "90", CVAR_NONE, "None");
	scr_viewsize = Cvar_Get("viewsize", "100", CVAR_ARCHIVE, "None");
	scr_conspeed = Cvar_Get("scr_conspeed", "300", CVAR_NONE, "None");
	scr_showturtle = Cvar_Get("showturtle", "0", CVAR_NONE, "None");
	scr_showpause = Cvar_Get("showpause", "1", CVAR_NONE, "None");
	scr_centertime = Cvar_Get("scr_centertime", "2", CVAR_NONE, "None");
	scr_printspeed = Cvar_Get("scr_printspeed", "8", CVAR_NONE, "None");
	gl_triplebuffer = Cvar_Get("gl_triplebuffer",  "1", CVAR_ARCHIVE, "None");

	crosshaircolor = Cvar_Get("crosshaircolor",  "79", CVAR_ARCHIVE, "None");
	crosshair = Cvar_Get("crosshair",  "0", CVAR_ARCHIVE, "None");
	cl_crossx = Cvar_Get("cl_crossx",  "0", CVAR_ARCHIVE, "None");
	cl_crossy = Cvar_Get("cl_crossy",  "0", CVAR_ARCHIVE, "None");
}

void
SCR_Init (void)
{
//
// register our commands
//
	Cmd_AddCommand ("screenshot",SCR_ScreenShot_f);
	Cmd_AddCommand ("snap",SCR_RSShot_f);
	Cmd_AddCommand ("sizeup",SCR_SizeUp_f);
	Cmd_AddCommand ("sizedown",SCR_SizeDown_f);

	scr_ram = Draw_PicFromWad ("ram");
	scr_net = Draw_PicFromWad ("net");
	scr_turtle = Draw_PicFromWad ("turtle");

	scr_initialized = true;
}



/*
==============
SCR_DrawTurtle
==============
*/
void SCR_DrawTurtle (void)
{
	static int      count;
	
	if (!scr_showturtle->int_val)
		return;

	if (host_frametime < 0.1)
	{
		count = 0;
		return;
	}

	count++;
	if (count < 3)
		return;

	Draw_Pic (scr_vrect.x, scr_vrect.y, scr_turtle);
}

/*
==============
SCR_DrawNet
==============
*/
void SCR_DrawNet (void)
{
	if (cls.netchan.outgoing_sequence - cls.netchan.incoming_acknowledged < UPDATE_BACKUP-1)
		return;
	if (cls.demoplayback)
		return;

	Draw_Pic (scr_vrect.x+64, scr_vrect.y, scr_net);
}

void SCR_DrawFPS (void)
{
	extern cvar_t *show_fps;
	static double lastframetime;
	double t;
	extern int fps_count;
	static int lastfps;
	int x, y;
	char st[80];

	if (!show_fps->int_val)
		return;

	t = Sys_DoubleTime();
	if ((t - lastframetime) >= 1.0) {
		lastfps = fps_count;
		fps_count = 0;
		lastframetime = t;
	}
	/* Misty: I really do need to read about sprintf a bit. This thing keeps chewing on my foot! */
	sprintf(st, "%-3d FPS", lastfps);
	/* Misty: New trick! (for me) the ? makes this work like a if then else - IE: if 
	cl_hudswap->int_val is not null, do first case, else (else is a : here) do second case.
	Deek taught me this trick */
	x = cl_hudswap->int_val ? vid.width - ((strlen (st) * 8) + 8) : 8;
	y = vid.height - sb_lines - 8;
	Draw_String8 (x, y, st);

}

/* Misty: I like to see the time */
void SCR_DrawTime (void)
{
	extern cvar_t *show_time;
	int x, y;
	char st[80];
	char local_time[120];
	time_t systime;
	
	if (!show_time->int_val)
		return;
	
	/* actually find the time and set systime to it*/
	time(&systime);
	/* now set local_time to 24 hour time using hours:minutes format */
	strftime(local_time, sizeof(local_time), "%k:%M", localtime(&systime));
	/* now actually print it to the screen directly below where show_fps is */
	sprintf(st, "%s", local_time);
	x = cl_hudswap->int_val ? vid.width - ((strlen (st) * 8) + 8) : 8;
	y = vid.height - sb_lines - 16;
	Draw_String8 (x, y, st);
}

/*
==============
DrawPause
==============
*/
void SCR_DrawPause (void)
{
	qpic_t  *pic;

	if (!scr_showpause->int_val)               // turn off for screenshots
		return;

	if (!cl.paused)
		return;

	pic = Draw_CachePic ("gfx/pause.lmp");
	Draw_Pic ( (vid.width - pic->width)/2, 
		(vid.height - 48 - pic->height)/2, pic);
}

//=============================================================================


/*
==================
SCR_SetUpToDrawConsole
==================
*/
void SCR_SetUpToDrawConsole (void)
{
	Con_CheckResize ();
	
// decide on the height of the console
	if (cls.state != ca_active)
	{
		scr_conlines = vid.height;              // full screen
		scr_con_current = scr_conlines;
	}
	else if (key_dest == key_console)
		scr_conlines = vid.height/2;    // half screen
	else
		scr_conlines = 0;                               // none visible
	
	if (scr_conlines < scr_con_current)
	{
		scr_con_current -= scr_conspeed->value*host_frametime;
		if (scr_conlines > scr_con_current)
			scr_con_current = scr_conlines;

	}
	else if (scr_conlines > scr_con_current)
	{
		scr_con_current += scr_conspeed->value*host_frametime;
		if (scr_conlines < scr_con_current)
			scr_con_current = scr_conlines;
	}

	if (clearconsole++ < vid.numpages)
	{
		Sbar_Changed ();
	}
	else if (clearnotify++ < vid.numpages)
	{
	}
	else
		con_notifylines = 0;
}
	
/*
==================
SCR_DrawConsole
==================
*/
void SCR_DrawConsole (void)
{
	if (scr_con_current)
	{
		scr_copyeverything = 1;
		Con_DrawConsole (scr_con_current);
		clearconsole = 0;
	}
	else
	{
		if (key_dest == key_game || key_dest == key_message)
			Con_DrawNotify ();      // only draw notify in game
	}
}


/* 
============================================================================== 
 
						SCREEN SHOTS 
 
============================================================================== 
*/ 

typedef struct _TargaHeader {
	unsigned char   id_length, colormap_type, image_type;
	unsigned short  colormap_index, colormap_length;
	unsigned char   colormap_size;
	unsigned short  x_origin, y_origin, width, height;
	unsigned char   pixel_size, attributes;
} TargaHeader;


/* 
================== 
SCR_ScreenShot_f
================== 
*/  
void SCR_ScreenShot_f (void) 
{
	byte            *buffer;
	char            pcxname[80]; 
	char            checkname[MAX_OSPATH];
	int                     i;
// 
// find a file name to save it to 
// 
	strcpy(pcxname,"qf000.tga");
		
	for (i=0 ; i<=999 ; i++) 
	{ 
		pcxname[2] = i / 100 + '0'; 
		pcxname[3] = i / 10 % 10 + '0'; 
		pcxname[4] = i % 10 + '0'; 
		snprintf (checkname, sizeof(checkname), "%s/%s", com_gamedir, pcxname);
		if (Sys_FileTime(checkname) == -1)
			break;  // file doesn't exist
	} 
	if (i==1000)
	{
		Con_Printf ("SCR_ScreenShot_f: Couldn't create a PCX file\n"); 
		return;
	}


	buffer = malloc(glwidth*glheight*3 + 18);
	memset (buffer, 0, 18);
	buffer[2] = 2;          // uncompressed type
	buffer[12] = glwidth&255;
	buffer[13] = glwidth>>8;
	buffer[14] = glheight&255;
	buffer[15] = glheight>>8;
	buffer[16] = 24;        // pixel size

	glReadPixels (glx, gly, glwidth, glheight, GL_BGR, GL_UNSIGNED_BYTE, buffer+18 ); 
	COM_WriteFile (pcxname, buffer, glwidth*glheight*3 + 18 );

	free (buffer);
	Con_Printf ("Wrote %s\n", pcxname);
} 

/* 
============== 
WritePCXfile 
============== 
*/ 
void WritePCXfile (char *filename, byte *data, int width, int height,
	int rowbytes, byte *palette, qboolean upload) 
{
	int		i, j, length;
	pcx_t	*pcx;
	byte		*pack;
	  
	pcx = Hunk_TempAlloc (width*height*2+1000);
	if (pcx == NULL)
	{
		Con_Printf("SCR_ScreenShot_f: not enough memory\n");
		return;
	} 
 
	pcx->manufacturer = 0x0a;	// PCX id
	pcx->version = 5;			// 256 color
 	pcx->encoding = 1;		// uncompressed
	pcx->bits_per_pixel = 8;		// 256 color
	pcx->xmin = 0;
	pcx->ymin = 0;
	pcx->xmax = LittleShort((short)(width-1));
	pcx->ymax = LittleShort((short)(height-1));
	pcx->hres = LittleShort((short)width);
	pcx->vres = LittleShort((short)height);
	memset (pcx->palette,0,sizeof(pcx->palette));
	pcx->color_planes = 1;		// chunky image
	pcx->bytes_per_line = LittleShort((short)width);
	pcx->palette_type = LittleShort(2);		// not a grey scale
	memset (pcx->filler,0,sizeof(pcx->filler));

// pack the image
	pack = &pcx->data;

	data += rowbytes * (height - 1);

	for (i=0 ; i<height ; i++)
	{
		for (j=0 ; j<width ; j++)
		{
			if ( (*data & 0xc0) != 0xc0)
				*pack++ = *data++;
			else
			{
				*pack++ = 0xc1;
				*pack++ = *data++;
			}
		}

		data += rowbytes - width;
		data -= rowbytes * 2;
	}
			
// write the palette
	*pack++ = 0x0c;	// palette ID byte
	for (i=0 ; i<768 ; i++)
		*pack++ = *palette++;
		
// write output file 
	length = pack - (byte *)pcx;

	if (upload)
		CL_StartUpload((void *)pcx, length);
	else
		COM_WriteFile (filename, pcx, length);
} 
 


/*
Find closest color in the palette for named color
*/
int MipColor(int r, int g, int b)
{
	int i;
	float dist;
	int best = 0;
	float bestdist;
	int r1, g1, b1;
	static int lr = -1, lg = -1, lb = -1;
	static int lastbest;

	if (r == lr && g == lg && b == lb)
		return lastbest;

	bestdist = 256*256*3;

	for (i = 0; i < 256; i++) {
		r1 = host_basepal[i*3] - r;
		g1 = host_basepal[i*3+1] - g;
		b1 = host_basepal[i*3+2] - b;
		dist = r1*r1 + g1*g1 + b1*b1;
		if (dist < bestdist) {
			bestdist = dist;
			best = i;
		}
	}
	lr = r; lg = g; lb = b;
	lastbest = best;
	return best;
}

// from gl_draw.c
byte		*draw_chars;				// 8*8 graphic characters

void SCR_DrawCharToSnap (int num, byte *dest, int width)
{
	int		row, col;
	byte	*source;
	int		drawline;
	int		x;

	row = num>>4;
	col = num&15;
	source = draw_chars + (row<<10) + (col<<3);

	drawline = 8;

	while (drawline--)
	{
		for (x=0 ; x<8 ; x++)
			if (source[x])
				dest[x] = source[x];
			else
				dest[x] = 98;
		source += 128;
		dest -= width;
	}

}

void SCR_DrawStringToSnap (const char *s, byte *buf, int x, int y, int width)
{
	byte *dest;
	const unsigned char *p;

	dest = buf + ((y * width) + x);

	p = (const unsigned char *)s;
	while (*p) {
		SCR_DrawCharToSnap(*p++, dest, width);
		dest += 8;
	}
}


/* 
================== 
SCR_RSShot_f
================== 
*/  
void SCR_RSShot_f (void) 
{ 
	int     x, y;
	unsigned char		*src, *dest;
	char		pcxname[80]; 
	unsigned char		*newbuf;
	int w, h;
	int dx, dy, dex, dey, nx;
	int r, b, g;
	int count;
	float fracw, frach;
	char st[80];
	time_t now;

	if (CL_IsUploading())
		return; // already one pending

	if (cls.state < ca_onserver)
		return; // gotta be connected

	Con_Printf("Remote screen shot requested.\n");

#if 0
// 
// find a file name to save it to 
// 
	strcpy(pcxname,"mquake00.pcx");
		
	for (i=0 ; i<=99 ; i++) 
	{ 
		pcxname[6] = i/10 + '0'; 
		pcxname[7] = i%10 + '0'; 
		snprintf (checkname, sizeof(checkname), "%s/%s", com_gamedir, pcxname);
		if (Sys_FileTime(checkname) == -1)
			break;	// file doesn't exist
	} 
	if (i==100) 
	{
		Con_Printf ("SCR_ScreenShot_f: Couldn't create a PCX"); 
		return;
	}
#endif
 
// 
// save the pcx file 
// 
	newbuf = malloc(glheight * glwidth * 3);

	glReadPixels (glx, gly, glwidth, glheight, GL_RGB, GL_UNSIGNED_BYTE, newbuf ); 

	w = (vid.width < RSSHOT_WIDTH) ? glwidth : RSSHOT_WIDTH;
	h = (vid.height < RSSHOT_HEIGHT) ? glheight : RSSHOT_HEIGHT;

	fracw = (float)glwidth / (float)w;
	frach = (float)glheight / (float)h;

	for (y = 0; y < h; y++) {
		dest = newbuf + (w*3 * y);

		for (x = 0; x < w; x++) {
			r = g = b = 0;

			dx = x * fracw;
			dex = (x + 1) * fracw;
			if (dex == dx) dex++; // at least one
			dy = y * frach;
			dey = (y + 1) * frach;
			if (dey == dy) dey++; // at least one

			count = 0;
			for (/* */; dy < dey; dy++) {
				src = newbuf + (glwidth * 3 * dy) + dx * 3;
				for (nx = dx; nx < dex; nx++) {
					r += *src++;
					g += *src++;
					b += *src++;
					count++;
				}
			}
			r /= count;
			g /= count;
			b /= count;
			*dest++ = r;
			*dest++ = b;
			*dest++ = g;
		}
	}

	// convert to eight bit
	for (y = 0; y < h; y++) {
		src = newbuf + (w * 3 * y);
		dest = newbuf + (w * y);

		for (x = 0; x < w; x++) {
			*dest++ = MipColor(src[0], src[1], src[2]);
			src += 3;
		}
	}

	time(&now);
	strcpy(st, ctime(&now));
	st[strlen(st) - 1] = 0;
	SCR_DrawStringToSnap (st, newbuf, w - strlen(st)*8, h - 1, w);

	strncpy(st, cls.servername, sizeof(st));
	st[sizeof(st) - 1] = 0;
	SCR_DrawStringToSnap (st, newbuf, w - strlen(st)*8, h - 11, w);

	strncpy(st, name->string, sizeof(st));
	st[sizeof(st) - 1] = 0;
	SCR_DrawStringToSnap (st, newbuf, w - strlen(st)*8, h - 21, w);

	WritePCXfile (pcxname, newbuf, w, h, w, host_basepal, true);

	free(newbuf);

	Con_Printf ("Wrote %s\n", pcxname);
} 




//=============================================================================


//=============================================================================

char    *scr_notifystring;

void SCR_DrawNotifyString (void)
{
	char    *start;
	int             l;
	int             j;
	int             x, y;

	start = scr_notifystring;

	y = vid.height*0.35;

	do      
	{
	// scan the width of the line
		for (l=0 ; l<40 ; l++)
			if (start[l] == '\n' || !start[l])
				break;
		x = (vid.width - l*8)/2;
		for (j=0 ; j<l ; j++, x+=8)
			Draw_Character8 (x, y, start[j]);        
			
		y += 8;

		while (*start && *start != '\n')
			start++;

		if (!*start)
			break;
		start++;                // skip the \n
	} while (1);
}

//=============================================================================

void SCR_TileClear (void)
{
	if (r_refdef.vrect.x > 0) {
		// left
		Draw_TileClear (0, 0, r_refdef.vrect.x, vid.height - sb_lines);
		// right
		Draw_TileClear (r_refdef.vrect.x + r_refdef.vrect.width, 0, 
			vid.width - r_refdef.vrect.x + r_refdef.vrect.width, 
			vid.height - sb_lines);
	}
	if (r_refdef.vrect.y > 0) {
		// top
		Draw_TileClear (r_refdef.vrect.x, 0, 
			r_refdef.vrect.x + r_refdef.vrect.width, 
			r_refdef.vrect.y);
		// bottom
		Draw_TileClear (r_refdef.vrect.x,
			r_refdef.vrect.y + r_refdef.vrect.height, 
			r_refdef.vrect.width, 
			vid.height - sb_lines - 
			(r_refdef.vrect.height + r_refdef.vrect.y));
	}
}

int oldsbar = 0;
int oldviewsize = 0;
extern void R_ForceLightUpdate();
qboolean lighthalf;
unsigned char lighthalf_v[3];
extern cvar_t *gl_lightmode, *brightness, *contrast;

/*
	SCR_UpdateScreen

	This is called every frame, and can also be called explicitly to flush
	text to the screen.

	WARNING: be very careful calling this from elsewhere, because the refresh
	needs almost the entire 256k of stack space!
*/
void
SCR_UpdateScreen (void)
{
	double	time1 = 0, time2;
	float	f;

	if (block_drawing)
		return;

	vid.numpages = 2 + gl_triplebuffer->int_val;

	scr_copytop = 0;
	scr_copyeverything = 0;

	if (scr_disabled_for_loading) {
		if (realtime - scr_disabled_time > 60) {
			scr_disabled_for_loading = false;
			Con_Printf ("load failed.\n");
		} else {
			return;
		}
	}

	if (!scr_initialized || !con_initialized)	// not initialized yet
		return;

	if (oldsbar != cl_sbar->int_val) {
		oldsbar = cl_sbar->int_val;
		vid.recalc_refdef = true;
	}

	if (oldviewsize != scr_viewsize->int_val) {
		oldviewsize = scr_viewsize->int_val;
		vid.recalc_refdef = true;
	}

	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	
	if (r_speeds->int_val) {
		time1 = Sys_DoubleTime ();
		c_brush_polys = 0;
		c_alias_polys = 0;
	}

	if (oldfov != scr_fov->value) {	// determine size of refresh window
		oldfov = scr_fov->value;
		vid.recalc_refdef = true;
	}

	if (vid.recalc_refdef)
		SCR_CalcRefdef ();

	// do 3D refresh drawing, and then update the screen

	if (lighthalf != gl_lightmode->int_val) {
		lighthalf = gl_lightmode->int_val;
		if (lighthalf)
			lighthalf_v[0] = lighthalf_v[1] = lighthalf_v[2] = 128;
		else
			lighthalf_v[0] = lighthalf_v[1] = lighthalf_v[2] = 255;
		R_ForceLightUpdate ();
	}

	SCR_SetUpToDrawConsole ();

	V_RenderView ();

	GL_Set2D ();

	// draw any areas not covered by the refresh
	SCR_TileClear ();

	if (r_netgraph->int_val)
		R_NetGraph ();

	if (cl.intermission == 1 && key_dest == key_game) {
		Sbar_IntermissionOverlay ();
	} else if (cl.intermission == 2 && key_dest == key_game) {
		Sbar_FinaleOverlay ();
		SCR_CheckDrawCenterString ();
	} else {
		if (crosshair->int_val)
			Draw_Crosshair();
		
		SCR_DrawNet ();
		SCR_DrawFPS ();
		SCR_DrawTime ();
		SCR_DrawTurtle ();
		SCR_DrawPause ();
		SCR_CheckDrawCenterString ();
		Sbar_Draw ();
		SCR_DrawConsole ();     
		M_Draw ();
	}

	// LordHavoc: adjustable brightness and contrast,
	//            also makes polyblend apply to whole screen
	glDisable (GL_TEXTURE_2D);
	
	Cvar_SetValue (brightness, bound (1, brightness->value, 5));
	if (lighthalf) // LordHavoc: render was done at half brightness
		f = brightness->value * 2;
	else
		f = brightness->value;
	if (f >= 1.002) {	// Make sure we don't get bit by roundoff errors
		glBlendFunc (GL_DST_COLOR, GL_ONE);
		glBegin (GL_QUADS);
		while (f >= 1.002) {	// precision
			if (f >= 2)
				glColor3f (1, 1, 1);
			else
				glColor3f (f-1, f-1, f-1);
			glVertex2f (0, 0);
			glVertex2f (vid.width, 0);
			glVertex2f (vid.width, vid.height);
			glVertex2f (0, vid.height);
			f *= 0.5;
		}
		glEnd ();
		glColor3ubv (lighthalf_v);
		glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	}
	Cvar_SetValue (contrast, bound (0.0, contrast->value, 1.0));
	if (v_blend[3] || (contrast->value < 0.999)) { // precision
		glBegin (GL_QUADS);
		if (contrast->value < 0.999) { // precision
			glColor4f (0.5, 0.5, 0.5, (1 - contrast->value));
			glVertex2f (0, 0);
			glVertex2f (vid.width, 0);
			glVertex2f (vid.width, vid.height);
			glVertex2f (0, vid.height);
		}
		
		if (v_blend[3]) {
			glColor4fv (v_blend);
			glVertex2f (0, 0);
			glVertex2f (vid.width, 0);
			glVertex2f (vid.width, vid.height);
			glVertex2f (0, vid.height);
		}
		glEnd ();
		glColor3ubv (lighthalf_v);
	}

	glEnable (GL_TEXTURE_2D);

	V_UpdatePalette ();

	if (r_speeds->int_val) {
//		glFinish ();
		time2 = Sys_DoubleTime ();
		Con_Printf ("%3i ms  %4i wpoly %4i epoly\n", (int)((time2-time1)*1000), c_brush_polys, c_alias_polys); 
	}

	glFinish ();
	GL_EndRendering ();
}