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package com.badlogic.gdx.assets.loaders;

import com.badlogic.gdx.assets.AssetDescriptor;
import com.badlogic.gdx.assets.AssetLoaderParameters;
import com.badlogic.gdx.assets.AssetManager;
import com.badlogic.gdx.graphics.g2d.tiled.TileAtlas;
import com.badlogic.gdx.graphics.g2d.tiled.TileMapRenderer;
import com.badlogic.gdx.graphics.g2d.tiled.TiledLoader;
import com.badlogic.gdx.graphics.g2d.tiled.TiledMap;
import com.badlogic.gdx.utils.Array;

/** {@link AssetLoader} for {@link TiledMap} instances.
 * @author mzechner */
public class TileMapRendererLoader extends SynchronousAssetLoader {
	/** Parameter for {@link TileMapRendererLoader}.
	 * @author mzechner */
	public static class TileMapParameter extends AssetLoaderParameters {
		/** the directory the images (pack files) are stored in **/
		public final String imageDirectory;
		public final int tilesPerBlockX;
		public final int tilesPerBlockY;
		public final float unitsPerTileX;
		public final float unitsPerTileY;

		public TileMapParameter (String imageDirectory, int tilesPerBlockX, int tilesPerBlockY) {
			this.imageDirectory = imageDirectory;
			this.tilesPerBlockX = tilesPerBlockX;
			this.tilesPerBlockY = tilesPerBlockY;
			this.unitsPerTileX = 0.0f;
			this.unitsPerTileY = 0.0f;
		}

		public TileMapParameter (String imageDirectory, int tilesPerBlockX, int tilesPerBlockY, float unitsPerTileX,
			float unitsPerTileY) {
			this.imageDirectory = imageDirectory;
			this.tilesPerBlockX = tilesPerBlockX;
			this.tilesPerBlockY = tilesPerBlockY;
			this.unitsPerTileX = unitsPerTileX;
			this.unitsPerTileY = unitsPerTileY;
		}
	}

	public TileMapRendererLoader (FileHandleResolver resolver) {
		super(resolver);
	}

	@Override
	public Array getDependencies (String fileName, TileMapParameter parameter) {
		if (parameter == null) throw new IllegalArgumentException("Missing TileMapRendererParameter: " + fileName);
		return null;
	}

	@Override
	public TileMapRenderer load (AssetManager assetManager, String fileName, TileMapParameter parameter) {
		TiledMap map = TiledLoader.createMap(resolve(fileName));
		TileAtlas atlas = new TileAtlas(map, resolve(parameter.imageDirectory));
		if (parameter.unitsPerTileX == 0 || parameter.unitsPerTileY == 0)
			return new TileMapRenderer(map, atlas, parameter.tilesPerBlockX, parameter.tilesPerBlockY);
		else
			return new TileMapRenderer(map, atlas, parameter.tilesPerBlockX, parameter.tilesPerBlockY, parameter.unitsPerTileX,
				parameter.unitsPerTileY);
	}
}