CustomRenderLayer.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;

import org.oscim.core.MapPosition;
import org.oscim.event.Event;
import org.oscim.map.Map;
import org.oscim.map.Map.UpdateListener;
import org.oscim.renderer.GLViewport;
import org.oscim.renderer.LayerRenderer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CustomRenderLayer extends Layer implements UpdateListener {

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

	class CustomRenderer extends LayerRenderer {

		// functions running on MapRender Thread
		@Override
		public void update(GLViewport v) {
			int currentState;

			synchronized (this) {
				currentState = someConccurentVariable;
				compile();
			}
			log.debug("state " + currentState);

		}

		protected void compile() {
			setReady(true);
		}

		@Override
		public void render(GLViewport v) {
		}
	}

	public CustomRenderLayer(Map map, LayerRenderer renderer) {

		super(map);
		mRenderer = new CustomRenderer();
	}

	private int someConccurentVariable;

	@Override
	public void onMapEvent(Event e, MapPosition mapPosition) {

		synchronized (mRenderer) {
			someConccurentVariable++;
		}
	}
}