/*
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.

*/

// screen.c -- master for refresh, status bar, console, chat, notify, etc

#include "client.h"
#include "cmd.h"
#include "console.h"
#include "draw.h"
#include "keys.h"
#include "menu.h"
#include "quakedef.h"
#include "r_local.h"
#include "sbar.h"
#include "screen.h"
#include "sys.h"
#include "wad.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

*/


// 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

static float oldscreensize, oldfov;
static float oldsbar;

cvar_t scr_viewsize = { "viewsize", "100", true };
cvar_t scr_fov = { "fov", "90" };	// 10 - 170
cvar_t scr_conspeed = { "scr_conspeed", "300" };
cvar_t scr_centertime = { "scr_centertime", "2" };
cvar_t scr_showram = { "showram", "1" };
cvar_t scr_showturtle = { "showturtle", "0" };
cvar_t scr_showpause = { "showpause", "1" };
cvar_t scr_printspeed = { "scr_printspeed", "8" };
cvar_t scr_allowsnap = { "scr_allowsnap", "1" };
static cvar_t show_fps = { "show_fps", "0" };	/* set for running times */

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;
int sb_lines;

vrect_t *pconupdate;
vrect_t scr_vrect;

qboolean scr_disabled_for_loading;
qboolean scr_skipupdate;
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_EraseCenterString(void)
{
    int y, height;

    if (scr_erase_center++ > vid.numpages) {
	scr_erase_lines = 0;
	return;
    }

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

    /* Make sure we don't draw off the bottom of the screen*/
    height = qmin(8 * scr_erase_lines, ((int)vid.height) - y - 1);

    scr_copytop = 1;
    Draw_TileClear(0, y, vid.width, height);
}


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_Character(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 = atan(height / x);
    a = a * 360 / M_PI;

    return a;
}


/*
=================
SCR_CalcRefdef

Must be called whenever vid changes
Internal use only
=================
*/
static void
SCR_CalcRefdef(void)
{
    vrect_t vrect;
    float size;

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

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

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

// bound viewsize
    if (scr_viewsize.value < 30)
	Cvar_Set("viewsize", "30");
    if (scr_viewsize.value > 120)
	Cvar_Set("viewsize", "120");

// bound field of view
    if (scr_fov.value < 10)
	Cvar_Set("fov", "10");
    if (scr_fov.value > 170)
	Cvar_Set("fov", "170");

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

// intermission is always full screen
    if (cl.intermission)
	size = 120;
    else
	size = scr_viewsize.value;

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

// these calculations mirror those in R_Init() for r_refdef, but take no
// account of water warping
    vrect.x = 0;
    vrect.y = 0;
    vrect.width = vid.width;
    vrect.height = vid.height;

    R_SetVrect(&vrect, &scr_vrect, sb_lines);

// guard against going from one mode to another that's less than half the
// vertical resolution
    if (scr_con_current > vid.height)
	scr_con_current = vid.height;

// notify the refresh of the change
    R_ViewChanged(&vrect, sb_lines, vid.aspect);
}


/*
=================
SCR_SizeUp_f

Keybinding command
=================
*/
void
SCR_SizeUp_f(void)
{
    if (scr_viewsize.value < 120) {
	Cvar_SetValue("viewsize", scr_viewsize.value + 10);
	vid.recalc_refdef = 1;
    }
}


/*
=================
SCR_SizeDown_f

Keybinding command
=================
*/
void
SCR_SizeDown_f(void)
{
    Cvar_SetValue("viewsize", scr_viewsize.value - 10);
    vid.recalc_refdef = 1;
}

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

/*
==================
SCR_Init
==================
*/
void
SCR_Init(void)
{
    Cvar_RegisterVariable(&scr_fov);
    Cvar_RegisterVariable(&scr_viewsize);
    Cvar_RegisterVariable(&scr_conspeed);
    Cvar_RegisterVariable(&scr_showram);
    Cvar_RegisterVariable(&scr_showturtle);
    Cvar_RegisterVariable(&scr_showpause);
    Cvar_RegisterVariable(&scr_centertime);
    Cvar_RegisterVariable(&scr_printspeed);
    Cvar_RegisterVariable(&scr_allowsnap);
    Cvar_RegisterVariable(&show_fps);

    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 = W_GetLumpName("ram");
    scr_net = W_GetLumpName("net");
    scr_turtle = W_GetLumpName("turtle");

    scr_initialized = true;
}


/*
==============
SCR_DrawRam
==============
*/
void
SCR_DrawRam(void)
{
    if (!scr_showram.value)
	return;

    if (!r_cache_thrash)
	return;

    Draw_Pic(scr_vrect.x + 32, scr_vrect.y, scr_ram);
}


/*
==============
SCR_DrawTurtle
==============
*/
void
SCR_DrawTurtle(void)
{
    static int count;

    if (!scr_showturtle.value)
	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)
{
    static double lastframetime;
    double t;
    static int lastfps;
    int x, y;
    char st[80];

    if (!show_fps.value)
	return;

    t = Sys_DoubleTime();
    if ((t - lastframetime) >= 1.0) {
	lastfps = fps_count;
	fps_count = 0;
	lastframetime = t;
    }

    sprintf(st, "%3d FPS", lastfps);
    x = vid.width - strlen(st) * 8 - 8;
    y = vid.height - sb_lines - 8;
//      Draw_TileClear(x, y, strlen(st) * 8, 8);
    Draw_String(x, y, st);
}


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

    if (!scr_showpause.value)	// 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
    con_forcedup = cls.state != ca_active;

    if (con_forcedup) {
	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) {
	scr_copytop = 1;
	Draw_TileClear(0, (int)scr_con_current, vid.width,
		       vid.height - (int)scr_con_current);
	Sbar_Changed();
    } else if (clearnotify++ < vid.numpages) {
	scr_copytop = 1;
	Draw_TileClear(0, 0, vid.width, con_notifylines);
    } 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

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


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

    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;
    }

// 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);
}


/*
==================
SCR_ScreenShot_f
==================
*/
void
SCR_ScreenShot_f(void)
{
    int i;
    char pcxname[80];
    char checkname[MAX_OSPATH];

//
// find a file name to save it to
//
    strcpy(pcxname, "quake00.pcx");

    for (i = 0; i <= 99; i++) {
	pcxname[5] = i / 10 + '0';
	pcxname[6] = i % 10 + '0';
	sprintf(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;
    }
//
// save the pcx file
//
    D_EnableBackBufferAccess();	// enable direct drawing of console to back
    //  buffer

    WritePCXfile(pcxname, vid.buffer, vid.width, vid.height, vid.rowbytes,
		 host_basepal, false);

    D_DisableBackBufferAccess();	// for adapters that can't stay mapped in
    //  for linear writes all the time

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


/*
Find closest color in the palette for named color
*/
int
MipColor(int r, int g, int b)
{
    int i;
    float dist;
    int best;
    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;

    best = 0;			// FIXME - Uninitialised? Assuming zero is ok...
    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;
}


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

    if (!scr_allowsnap.value) {
	MSG_WriteByte(&cls.netchan.message, clc_stringcmd);
	SZ_Print(&cls.netchan.message, "snap\n");
	Con_Printf("Refusing remote screen shot request.\n");
	return;
    }

    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';
	sprintf(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
//
    D_EnableBackBufferAccess();	// enable direct drawing of console to back
    //  buffer

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

    fracw = (float)vid.width / (float)w;
    frach = (float)vid.height / (float)h;

    newbuf = malloc(w * h);

    for (y = 0; y < h; y++) {
	dest = newbuf + (w * 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 = vid.buffer + (vid.rowbytes * dy) + dx;
		for (nx = dx; nx < dex; nx++) {
		    r += host_basepal[*src * 3];
		    g += host_basepal[*src * 3 + 1];
		    b += host_basepal[*src * 3 + 2];
		    src++;
		    count++;
		}
	    }
	    r /= count;
	    g /= count;
	    b /= count;
	    *dest++ = MipColor(r, g, b);
	}
    }

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

    strncpy(st, cls.servername, sizeof(st));
    st[sizeof(st) - 1] = 0;
    SCR_DrawStringToSnap(st, newbuf, w - strlen(st) * 8, 10, w);

    strncpy(st, name.string, sizeof(st));
    st[sizeof(st) - 1] = 0;
    SCR_DrawStringToSnap(st, newbuf, w - strlen(st) * 8, 20, w);

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

    free(newbuf);

    D_DisableBackBufferAccess();	// for adapters that can't stay mapped in
    //  for linear writes all the time

//      Con_Printf ("Wrote %s\n", pcxname);
    Con_Printf("Sending shot to server...\n");
}


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

static char *scr_notifystring;
static qboolean scr_drawdialog;

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_Character(x, y, start[j]);

	y += 8;

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

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


/*
==================
SCR_ModalMessage

Displays a text string in the center of the screen and waits for a Y or N
keypress.
==================
*/
int
SCR_ModalMessage(char *text)
{
    scr_notifystring = text;

// draw a fresh screen
    scr_fullupdate = 0;
    scr_drawdialog = true;
    SCR_UpdateScreen();
    scr_drawdialog = false;

    S_ClearBuffer();		// so dma doesn't loop current sound

    do {
	key_count = -1;		// wait for a key down and up
	Sys_SendKeyEvents();
    } while (key_lastpress != 'y' && key_lastpress != 'n'
	     && key_lastpress != K_ESCAPE);

    scr_fullupdate = 0;
    SCR_UpdateScreen();

    return key_lastpress == 'y';
}


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

/*
===============
SCR_BringDownConsole

Brings the console down and fades the palettes back to normal
================
*/
void
SCR_BringDownConsole(void)
{
    int i;

    scr_centertime_off = 0;

    for (i = 0; i < 20 && scr_conlines != scr_con_current; i++)
	SCR_UpdateScreen();

    cl.cshifts[0].percent = 0;	// no area contents palette on next frame
    VID_SetPalette(host_basepal);
}


/*
==================
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)
{
    static float oldscr_viewsize;
    vrect_t vrect;

    if (scr_skipupdate || block_drawing)
	return;

    if (scr_disabled_for_loading)
	return;

#ifdef _WIN32
    {				// don't suck up any cpu if minimized
	if (!window_visible())
	    return;
    }
#endif

    scr_copytop = 0;
    scr_copyeverything = 0;

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

    if (scr_viewsize.value != oldscr_viewsize) {
	oldscr_viewsize = scr_viewsize.value;
	vid.recalc_refdef = 1;
    }
//
// check for vid changes
//
    if (oldfov != scr_fov.value) {
	oldfov = scr_fov.value;
	vid.recalc_refdef = true;
    }

    if (oldscreensize != scr_viewsize.value) {
	oldscreensize = scr_viewsize.value;
	vid.recalc_refdef = true;
    }

    if (oldsbar != cl_sbar.value) {
	oldsbar = cl_sbar.value;
	vid.recalc_refdef = true;
    }

    if (vid.recalc_refdef) {
	// something changed, so reorder the screen
	SCR_CalcRefdef();
    }
//
// do 3D refresh drawing, and then update the screen
//
    D_EnableBackBufferAccess();	// of all overlay stuff if drawing directly

    if (scr_fullupdate++ < vid.numpages) {	// clear the entire screen
	scr_copyeverything = 1;
	Draw_TileClear(0, 0, vid.width, vid.height);
	Sbar_Changed();
    }

    pconupdate = NULL;

    SCR_SetUpToDrawConsole();
    SCR_EraseCenterString();

    D_DisableBackBufferAccess();	// for adapters that can't stay mapped in
    //  for linear writes all the time

    VID_LockBuffer();
    V_RenderView();
    VID_UnlockBuffer();

    D_EnableBackBufferAccess();	// of all overlay stuff if drawing directly

    if (scr_drawdialog) {
	Sbar_Draw();
	Draw_FadeScreen();
	SCR_DrawNotifyString();
	scr_copyeverything = true;
    } else if (cl.intermission == 1 && key_dest == key_game) {
	Sbar_IntermissionOverlay();
    } else if (cl.intermission == 2 && key_dest == key_game) {
	Sbar_FinaleOverlay();
	SCR_CheckDrawCenterString();
    } else {
	SCR_DrawRam();
	SCR_DrawNet();
	SCR_DrawTurtle();
	SCR_DrawPause();
	SCR_DrawFPS();
	SCR_CheckDrawCenterString();
	Sbar_Draw();
	SCR_DrawConsole();
	M_Draw();
    }

    D_DisableBackBufferAccess();	// for adapters that can't stay mapped in
    //  for linear writes all the time
    if (pconupdate) {
	D_UpdateRects(pconupdate);
    }

    V_UpdatePalette();

//
// update one of three areas
//
    if (scr_copyeverything) {
	vrect.x = 0;
	vrect.y = 0;
	vrect.width = vid.width;
	vrect.height = vid.height;
	vrect.pnext = 0;

	VID_Update(&vrect);
    } else if (scr_copytop) {
	vrect.x = 0;
	vrect.y = 0;
	vrect.width = vid.width;
	vrect.height = vid.height - sb_lines;
	vrect.pnext = 0;

	VID_Update(&vrect);
    } else {
	vrect.x = scr_vrect.x;
	vrect.y = scr_vrect.y;
	vrect.width = scr_vrect.width;
	vrect.height = scr_vrect.height;
	vrect.pnext = 0;

	VID_Update(&vrect);
    }
}


/*
==================
SCR_UpdateWholeScreen
==================
*/
void
SCR_UpdateWholeScreen(void)
{
    scr_fullupdate = 0;
    SCR_UpdateScreen();
}
