//
// Copyright(C) 2005-2014 Simon Howard
//
// 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.
//
// DESCRIPTION:
//    Exit text-mode ENDOOM screen.
//

#include <stdio.h>
#include <string.h>

#include "config.h"
#include "doomtype.h"
#include "i_video.h"

#include "txt_main.h"

#define ENDOOM_W 80
#define ENDOOM_H 25

// 
// Displays the text mode ending screen after the game quits
//

void I_Endoom(byte *endoom_data)
{
    unsigned char *screendata;
    int y;
    int indent;

    // Set up text mode screen

    // OpenVMS port: TXT_Init()'s return value is now checked.  See
    // COMPILER_FIXES.TXT.  Upstream ignores it, but every one of its failure
    // exits leaves screendata NULL, so the memcpy below would write through a
    // null pointer.  On VMS this matters more than elsewhere: I_Endoom runs
    // from the exit path, after I_ShutdownGraphics has already dropped the
    // video subsystem, and re-initialising DECwindows can legitimately fail
    // (no DISPLAY, server gone at logout, X connection already torn down).
    // ENDOOM is decoration - skipping it quietly is the correct behaviour.
    if (!TXT_Init())
    {
        return;
    }

    I_InitWindowTitle();
    I_InitWindowIcon();

    // Write the data to the screen memory

    screendata = TXT_GetScreenData();

    if (screendata == NULL)
    {
        TXT_Shutdown();
        return;
    }

    indent = (ENDOOM_W - TXT_SCREEN_W) / 2;

    for (y=0; y<TXT_SCREEN_H; ++y)
    {
        memcpy(screendata + (y * TXT_SCREEN_W * 2),
               endoom_data + (y * ENDOOM_W + indent) * 2,
               TXT_SCREEN_W * 2);
    }

    // Wait for a keypress

    while (true)
    {
        TXT_UpdateScreen();

        if (TXT_GetChar() > 0)
        {
            break;
        }

        TXT_Sleep(0);
    }

    // Shut down text mode screen

    TXT_Shutdown();
}

