/* Residual - Virtual machine to run LucasArts' 3D adventure games
 *
 * Residual is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the AUTHORS
 * file distributed with this source distribution.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library 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
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 *
 * $URL$
 * $Id$
 *
 */

#include "common/sys.h"
#include "common/endian.h"
#include "common/debug.h"

#include "engine/material.h"
#include "engine/colormap.h"
#include "engine/backend/driver.h"

Material::Material(const char *filename, const char *data, int len, const CMap &cmap) :
		Resource(filename), _cmap((CMap *) &cmap) {
	if (len < 4 || memcmp(data, "MAT ", 4) != 0)
		error("invalid magic loading texture\n");

	_numImages = READ_LE_UINT32(data + 12);
	_currImage = 0;
	_width = READ_LE_UINT32(data + 76 + _numImages * 40);
	_height = READ_LE_UINT32(data + 80 + _numImages * 40);

	if ((_width == 0) || (_height == 0)) {
		if (debugLevel == DEBUG_WARN || debugLevel == DEBUG_ALL)
			warning("skip load texture: bad texture size (%dx%d) for texture %s\n", _width, _height, filename);
		return;
	}

	data += 100 + _numImages * 40;

	g_driver->createMaterial(this, data, &cmap);
}

void Material::select() const {
	if ((_width == 0) || (_height == 0))
	    return;
	g_driver->selectMaterial(this);
}

Material::~Material() {
	if ((_width == 0) || (_height == 0))
	    return;
	g_driver->destroyMaterial(this);
}