/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.graphics.g3d.attributes;

import com.badlogic.gdx.graphics.Cubemap;
import com.badlogic.gdx.graphics.g3d.Attribute;
import com.badlogic.gdx.graphics.g3d.utils.TextureDescriptor;
import com.badlogic.gdx.utils.GdxRuntimeException;

public class CubemapAttribute extends Attribute {
	public final static String EnvironmentMapAlias = "environmentCubemap";
	public final static long EnvironmentMap = register(EnvironmentMapAlias);

	protected static long Mask = EnvironmentMap;

	public final static boolean is (final long mask) {
		return (mask & Mask) != 0;
	}

	public final TextureDescriptor<Cubemap> textureDescription;

	public CubemapAttribute (final long type) {
		super(type);
		if (!is(type)) throw new GdxRuntimeException("Invalid type specified");
		textureDescription = new TextureDescriptor<Cubemap>();
	}

	public <T extends Cubemap> CubemapAttribute (final long type, final TextureDescriptor<T> textureDescription) {
		this(type);
		this.textureDescription.set(textureDescription);
	}

	public CubemapAttribute (final long type, final Cubemap texture) {
		this(type);
		textureDescription.texture = texture;
	}

	public CubemapAttribute (final CubemapAttribute copyFrom) {
		this(copyFrom.type, copyFrom.textureDescription);
	}

	@Override
	public Attribute copy () {
		return new CubemapAttribute(this);
	}

	@Override
	public int hashCode () {
		int result = super.hashCode();
		result = 967 * result + textureDescription.hashCode();
		return result;
	}
	
	@Override
	public int compareTo (Attribute o) {
		if (type != o.type) return (int)(type - o.type);
		return textureDescription.compareTo(((CubemapAttribute)o).textureDescription);
	}
}