/*******************************************************************************
 * Copyright (c) 2013, Esoteric Software
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/

using System;
using System.IO;
using UnityEngine;
using Spine;

public class AtlasAsset : ScriptableObject {
	public TextAsset atlasFile;
	public Material material;
	private Atlas atlas;

	public void Clear () {
		atlas = null;
	}

	/// <returns>The atlas or null if it could not be loaded.</returns>
	public Atlas GetAtlas () {
		if (atlasFile == null) {
			Debug.LogWarning("Atlas file not set for atlas asset: " + name, this);
			Clear();
			return null;
		}

		if (material == null) {
			Debug.LogWarning("Material not set for atlas asset: " + name, this);
			Clear();
			return null;
		}

		if (atlas != null)
			return atlas;

		try {
			atlas = new Atlas(new StringReader(atlasFile.text), material, material.mainTexture.width, material.mainTexture.height);
			return atlas;
		} catch (Exception) {
			Debug.LogException(new Exception("Error reading atlas file for atlas asset: " + name), this);
			return null;
		}
	}
}