/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            mipmap.cc
 *
 *  Fri Sep  3 16:39:46 CEST 2010
 *  Copyright 2010 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "mipmap.h"

MipMap::MipMap(float* data, size_t size)
{
	this->data = data;
	this->size = size;
	this->zoom = 1;
}

MipMapValue MipMap::data_lookup(size_t begin, size_t end)
{
	MipMapValue val;

	size_t numlavg = 0;
	size_t numuavg = 0;
	for(size_t i = begin; i <= end; i++)
	{
		if(i > size || i < 0)
		{
			break;
		}
		if(data[i] > val.max)
		{
			val.max = data[i];
		}
		if(data[i] < val.min)
		{
			val.min = data[i];
		}

		if(data[i] > 0)
		{
			val.uavg += data[i];
			numuavg++;
		}
		if(data[i] < 0)
		{
			val.lavg += data[i];
			numlavg++;
		}
	}

	if(numlavg)
	{
		val.lavg /= (float) numlavg;
	}
	if(numuavg)
	{
		val.uavg /= (float) numuavg;
	}

	return val;
}

MipMapValue MipMap::mipmap_lookup(size_t begin, size_t end)
{
	MipMapValue val;

	size_t numlavg = 0;
	size_t numuavg = 0;
	for(size_t i = begin; i <= end; i++)
	{
		if(i > size || i < 0)
		{
			break;
		}
		if(data[i] > val.max)
		{
			val.max = data[i];
		}
		if(data[i] < val.min)
		{
			val.min = data[i];
		}

		if(data[i] > 0)
		{
			val.uavg += data[i];
			numuavg++;
		}
		if(data[i] < 0)
		{
			val.lavg += data[i];
			numlavg++;
		}
	}

	if(numlavg)
	{
		val.lavg /= (float) numlavg;
	}
	if(numuavg)
	{
		val.uavg /= (float) numuavg;
	}

	return val;
}

#define ABS(x) (x>0?x:-x)

MipMapValue MipMap::lookup(size_t begin, size_t end)
{
	return data_lookup(begin, end);

	//size_t zoom_factor = ABS(end - begin);
	//
	//if(zoom_factor < zoom / 2)
	//{
	//	if(zoom == 1)
	//	{
	//		// Lookup in original data.
	//		return data_lookup(begin, end);
	//  }
	//
	//	return mipmap_lookup(begin, end);
	//}
	//
	//if(lowerlevel)
	//{
	//	return lowerlevel->lookup(begin,end);
	//}
	//
	//return MipMapValue();
}