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

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 __R_DRAW__
#define __R_DRAW__


#ifdef __GNUG__
#pragma interface
#endif


extern lighttable_t*	dc_colormap;
extern int		dc_x;
extern int		dc_yl;
extern int		dc_yh;
extern fixed_t		dc_iscale;
extern fixed_t		dc_texturemid;

// first pixel in a column
extern byte*		dc_source;		


// The span blitting interface.
// Hook in assembler or system specific BLT
//  here.
void 	R_DrawColumn ( lighttable_t * dc_colormap,
						byte * dc_source );

void 	R_DrawColumnLow ( lighttable_t * dc_colormap,
						  byte * dc_source );

// The Spectre/Invisibility effect.
void 	R_DrawFuzzColumn ( lighttable_t * dc_colormap,
						  byte * dc_source );
void 	R_DrawFuzzColumnLow ( lighttable_t * dc_colormap,
						  byte * dc_source );

// Draw with color translation tables,
//  for player sprite rendering,
//  Green/Red/Blue/Indigo shirts.
void	R_DrawTranslatedColumn ( lighttable_t * dc_colormap,
						  byte * dc_source );
void	R_DrawTranslatedColumnLow ( lighttable_t * dc_colormap,
						  byte * dc_source );

void
R_VideoErase
( unsigned	ofs,
  int		count );

extern int		ds_y;
extern int		ds_x1;
extern int		ds_x2;

extern lighttable_t*	ds_colormap;

extern fixed_t		ds_xfrac;
extern fixed_t		ds_yfrac;
extern fixed_t		ds_xstep;
extern fixed_t		ds_ystep;

// start of a 64*64 tile image
extern byte*		ds_source;		

extern byte*		translationtables;
extern byte*		dc_translation;


// Span blitting for rows, floor/ceiling.
// No Sepctre effect needed.
void 	R_DrawSpan (
	fixed_t xfrac,
	fixed_t yfrac,
	fixed_t ds_y,
	int ds_x1,
	int ds_x2,
	fixed_t ds_xstep,
	fixed_t ds_ystep,
	lighttable_t * ds_colormap,
	byte * ds_source );

// Low resolution mode, 160x200?
void 	R_DrawSpanLow ( fixed_t xfrac,
				  fixed_t yfrac,
				  fixed_t ds_y,
				  int ds_x1,
				  int ds_x2,
				  fixed_t ds_xstep,
				  fixed_t ds_ystep,
				  lighttable_t * ds_colormap,
				  byte * ds_source );


void
R_InitBuffer
( int		width,
  int		height );


// Initialize color translation tables,
//  for player rendering etc.
void	R_InitTranslationTables (void);



// Rendering function.
void R_FillBackScreen (void);

// If the view size is not full screen, draws a border around it.
void R_DrawViewBorder (void);



#endif