//
// 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.
//

#include <stdlib.h>
#include "templates.h"
#include "doomdef.h"
#include "m_bbox.h"
#include "i_system.h"
#include "p_lnspec.h"
#include "p_setup.h"
#include "swrenderer/drawers/r_draw.h"
#include "swrenderer/plane/r_visibleplane.h"
#include "a_sharedglobal.h"
#include "g_level.h"
#include "p_effect.h"
#include "doomstat.h"
#include "r_state.h"
#include "v_palette.h"
#include "r_sky.h"
#include "po_man.h"
#include "r_data/colormaps.h"
#include "r_memory.h"

namespace swrenderer
{
	short *openings;

	namespace
	{
		size_t maxopenings;
		ptrdiff_t lastopening;
	}

	ptrdiff_t R_NewOpening(ptrdiff_t len)
	{
		ptrdiff_t res = lastopening;
		len = (len + 1) & ~1;	// only return DWORD aligned addresses because some code stores fixed_t's and floats in openings... 
		lastopening += len;
		if ((size_t)lastopening > maxopenings)
		{
			do
				maxopenings = maxopenings ? maxopenings * 2 : 16384;
			while ((size_t)lastopening > maxopenings);
			openings = (short *)M_Realloc(openings, maxopenings * sizeof(*openings));
			DPrintf(DMSG_NOTIFY, "MaxOpenings increased to %zu\n", maxopenings);
		}
		return res;
	}

	void R_FreeOpenings()
	{
		lastopening = 0;
	}

	void R_DeinitOpenings()
	{
		if (openings != nullptr)
		{
			M_Free(openings);
			openings = nullptr;
		}
	}

	/////////////////////////////////////////////////////////////////////////

	namespace
	{
		enum { max_plane_lights = 32 * 1024 };
		visplane_light plane_lights[max_plane_lights];
		int next_plane_light = 0;
	}

	visplane_light *R_NewPlaneLight()
	{
		if (next_plane_light == max_plane_lights)
			return nullptr;
		return &plane_lights[next_plane_light++];
	}

	void R_FreePlaneLights()
	{
		next_plane_light = 0;
	}
}