// 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:
//		Refresh module, drawing LineSegs from BSP.
//
//-----------------------------------------------------------------------------


#ifndef __R_SEGS_H__
#define __R_SEGS_H__

struct drawseg_t;

void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2);

extern short *openings;
extern ptrdiff_t lastopening;
extern size_t maxopenings;

int OWallMost (short *mostbuf, double z, const FWallCoords *wallc);
int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc);
void PrepWall (fixed_t *swall, fixed_t *lwall, double walxrepeat, int x1, int x2);
void PrepLWall (fixed_t *lwall, double walxrepeat, int x1, int x2);

ptrdiff_t R_NewOpening (ptrdiff_t len);

void R_CheckDrawSegs ();

void R_RenderSegLoop ();

extern fixed_t	swall[MAXWIDTH];
extern fixed_t	lwall[MAXWIDTH];
extern fixed_t	rw_light;		// [RH] Scale lights with viewsize adjustments
extern fixed_t	rw_lightstep;
extern fixed_t	rw_lightleft;
extern fixed_t	rw_offset;

/* portal structure, this is used in r_ code in order to store drawsegs with portals (and mirrors) */
struct PortalDrawseg
{
	line_t* src; // source line (the one drawn) this doesn't change over render loops
	line_t* dst; // destination line (the one that the portal is linked with, equals 'src' for mirrors)

	int x1; // drawseg x1
	int x2; // drawseg x2

	int len;
	TArray<short> ceilingclip;
	TArray<short> floorclip;

	bool mirror; // true if this is a mirror (src should equal dst)
};

extern PortalDrawseg* CurrentPortal;
extern int CurrentPortalUniq;
extern bool CurrentPortalInSkybox;
extern TArray<PortalDrawseg> WallPortals;

#endif