Magazyn Amiga 14/MA_Cover_14.iso/source/c/q1source_amy/qw/client/gl_screen.c

C/C++ Source or Header | 1999-12-21 | 24.3 KB | 1,189 lines

/*
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 "quakedef.h"

#include <time.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


*/


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 = {"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"};
cvar_t            gl_triplebuffer = {"gl_triplebuffer", "1", true };
extern          cvar_t  crosshair;

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;

viddef_t        vid;                            // global video state

vrect_t         scr_vrect;

qboolean        scr_disabled_for_loading;
qboolean        scr_drawloading;
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_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)
{
    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
    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");

// 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;

    if (scr_viewsize.value >= 100.0) {
        full = true;
        size = 100.0;
    } else
        size = scr_viewsize.value;
    if (cl.intermission)
    {
        full = true;
        size = 100.0;
        sb_lines = 0;
    }
    size /= 100.0;

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

    r_refdef.vrect.width = vid.width * size;
    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;
    if (cl_sbar.value || !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 ("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 (&gl_triplebuffer);

//
// 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_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)
{
    extern cvar_t show_fps;
    static double lastframetime;
    double t;
    extern int fps_count;
    static 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_DrawLoading
==============
*/
void SCR_DrawLoading (void)
{
    qpic_t  *pic;

    if (!scr_drawloading)
        return;

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



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


/*
==================
SCR_SetUpToDrawConsole
==================
*/
void SCR_SetUpToDrawConsole (void)
{
    Con_CheckResize ();

    if (scr_drawloading)
        return;         // never a console with loading plaque

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

    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 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_RGB, GL_UNSIGNED_BYTE, buffer+18 );

    // swap rgb to bgr
    c = 18+glwidth*glheight*3;
    for (i=18 ; i<c ; i+=3)
    {
        temp = buffer[i];
        buffer[i] = buffer[i+2];
        buffer[i+2] = temp;
    }
    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);
    Q_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
    Q_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;
    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     i, x, y;
    unsigned char        *src, *dest;
    char        pcxname[80];
    char        checkname[MAX_OSPATH];
    unsigned char        *newbuf, *srcbuf;
    int srcrowbytes;
    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';
        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
//
    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;
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);
}

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));
    }
}

float oldsbar = 0;

/*
==================
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)
{
    if (block_drawing)
        return;

    vid.numpages = 2 + gl_triplebuffer.value;

    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)
        return;                         // not initialized yet


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

    GL_BeginRendering (&glx, &gly, &glwidth, &glheight);

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

    if (vid.recalc_refdef)
        SCR_CalcRefdef ();

//
// do 3D refresh drawing, and then update the screen
//
    SCR_SetUpToDrawConsole ();

    V_RenderView ();

    GL_Set2D ();

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

    if (r_netgraph.value)
        R_NetGraph ();

    if (scr_drawdialog)
    {
        Sbar_Draw ();
        Draw_FadeScreen ();
        SCR_DrawNotifyString ();
        scr_copyeverything = true;
    }
    else if (scr_drawloading)
    {
        SCR_DrawLoading ();
        Sbar_Draw ();
    }
    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
    {
        if (crosshair.value)
            Draw_Crosshair();

        SCR_DrawRam ();
        SCR_DrawNet ();
        SCR_DrawFPS ();
        SCR_DrawTurtle ();
        SCR_DrawPause ();
        SCR_CheckDrawCenterString ();
        Sbar_Draw ();
        SCR_DrawConsole ();
        M_Draw ();
    }

    V_UpdatePalette ();

    GL_EndRendering ();
}