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

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  

Doom 3 BFG Edition Source Code 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 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code 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 Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

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

#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];

const 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