BitmapTileLoader.java

/*
 * Copyright 2013 Hannes Janetzek
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program 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 3 of the License, or (at your option) any later version.
 *
 * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.layers.tile.bitmap;

import static org.oscim.layers.tile.MapTile.State.LOADING;

import org.oscim.backend.canvas.Bitmap;
import org.oscim.core.Tile;
import org.oscim.layers.tile.MapTile;
import org.oscim.layers.tile.TileLoader;
import org.oscim.renderer.bucket.BitmapBucket;
import org.oscim.renderer.bucket.RenderBuckets;
import org.oscim.tiling.ITileDataSource;
import org.oscim.tiling.TileSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class BitmapTileLoader extends TileLoader {

	protected static final Logger log = LoggerFactory.getLogger(BitmapTileLoader.class);

	private final ITileDataSource mTileDataSource;
	private final BitmapTileLayer mLayer;

	public BitmapTileLoader(BitmapTileLayer tileLayer, TileSource tileSource) {
		super(tileLayer.getManager());
		mTileDataSource = tileSource.getDataSource();
		mLayer = tileLayer;
	}

	@Override
	protected boolean loadTile(MapTile tile) {
		try {
			mTileDataSource.query(tile, this);
		} catch (Exception e) {
			log.debug("{} {}", tile, e.getMessage());
			return false;
		}
		return true;
	}

	@Override
	public void setTileImage(Bitmap bitmap) {
		if (isCanceled() || !mTile.state(LOADING)) {
			bitmap.recycle();
			return;
		}

		BitmapBucket l = new BitmapBucket(false);
		l.setBitmap(bitmap, Tile.SIZE, Tile.SIZE, mLayer.pool);

		RenderBuckets buckets = new RenderBuckets();
		buckets.set(l);
		mTile.data = buckets;
	}

	@Override
	public void dispose() {
		mTileDataSource.cancel();
	}

	@Override
	public void cancel() {
		mTileDataSource.cancel();
	}
}