/* Emacs style mode select   -*- C++ -*- */
/*----------------------------------------------------------------------------- */
/* */
/* $Id:$ */
/* */
/* Copyright (C) 1993-1996 by id Software, Inc. */
/* */
/* This source is available for distribution and/or modification */
/* only under the terms of the DOOM Source Code License as */
/* published by id Software. All rights reserved. */
/* */
/* The source is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License */
/* for more details. */
/* */
/* DESCRIPTION: */
/*	Gamma correction LUT. */
/*	Functions to draw patches (by post) directly to screen. */
/*	Functions to blit a block to the screen. */
/* */
/*----------------------------------------------------------------------------- */


#ifndef __V_VIDEO__
#define __V_VIDEO__

#include "doomtype.h"

#include "doomdef.h"

/* Needed because we are refering to patches. */
#include "r_data.h"

/* */
/* VIDEO */
/* */

#define CENTERY                 (SCREENHEIGHT/2)


/* Screen 0 is the screen updated by I_Update screen. */
/* Screen 1 is an extra buffer. */



extern byte*           screens[5];

extern int dirtybox[4];

extern byte gammatable[5][256];
extern int usegamma;



/* Allocates buffer screens, call before R_Init. */
void V_Init (void);


void
V_CopyRect
        ( int srcx,
        int srcy,
        int srcscrn,
        int width,
        int height,
        int destx,
        int desty,
        int destscrn );

void
V_DrawPatch
        ( int x,
        int y,
        int scrn,
        patch_t*      patch);

void
V_DrawPatchDirect
        ( int x,
        int y,
        int scrn,
        patch_t*      patch );


/* Draw a linear block of pixels into the view buffer. */
void
V_DrawBlock
        ( int x,
        int y,
        int scrn,
        int width,
        int height,
        byte*         src );

/* Reads a linear block of pixels into the view buffer. */
void
V_GetBlock
        ( int x,
        int y,
        int scrn,
        int width,
        int height,
        byte*         dest );


void
V_MarkRect
        ( int x,
        int y,
        int width,
        int height );

#endif
/*----------------------------------------------------------------------------- */
/* */
/* $Log:$ */
/* */
/*----------------------------------------------------------------------------- */
