RuntimeImage.java

/**
 * eAdventure (formerly <e-Adventure> and <e-Game>) is a research project of the
 *    <e-UCM> research group.
 *
 *    Copyright 2005-2010 <e-UCM> research group.
 *
 *    You can access a list of all the contributors to eAdventure at:
 *          http://e-adventure.e-ucm.es/contributors
 *
 *    <e-UCM> is a research group of the Department of Software Engineering
 *          and Artificial Intelligence at the Complutense University of Madrid
 *          (School of Computer Science).
 *
 *          C Profesor Jose Garcia Santesmases sn,
 *          28040 Madrid (Madrid), Spain.
 *
 *          For more info please visit:  <http://e-adventure.e-ucm.es> or
 *          <http://www.e-ucm.es>
 *
 * ****************************************************************************
 *
 *  This file is part of eAdventure, version 2.0
 *
 *      eAdventure 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.
 *
 *      eAdventure 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 eAdventure.  If not, see <http://www.gnu.org/licenses/>.
 */

package es.eucm.ead.engine.assets.drawables;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.TextureAtlas;
import com.badlogic.gdx.graphics.g2d.TextureAtlas.AtlasRegion;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.google.inject.Inject;

import es.eucm.ead.model.assets.drawable.basics.Image;
import es.eucm.ead.engine.assets.AbstractRuntimeAsset;
import es.eucm.ead.engine.assets.AssetHandler;
import es.eucm.ead.engine.assets.AssetHandlerImpl;
import es.eucm.ead.engine.canvas.GdxCanvas;

/**
 * Represents a runtime engine image
 * 
 */
public class RuntimeImage extends AbstractRuntimeAsset<Image> implements
		RuntimeDrawable<Image> {

	static private Logger logger = LoggerFactory.getLogger(RuntimeImage.class);

	private FileHandle fh;
	private TextureRegion textureRegion;
	private Pixmap pixmap;
	private static TextureAtlas atlas;
	private static boolean hasAtlas = true;

	@Inject
	public RuntimeImage(AssetHandler assetHandler) {
		super(assetHandler);
	}

	@Override
	public boolean loadAsset() {
		if (hasAtlas) {
			if (atlas == null) {
				FileHandle atlasFh = ((AssetHandlerImpl) assetHandler)
						.getFileHandle("@atlas/eadatlas.atlas");
				if (atlasFh.exists()) {
					atlas = new TextureAtlas(atlasFh);
				} else {
					hasAtlas = false;
				}
			}
		}

		super.loadAsset();

		if (hasAtlas) {
			AtlasRegion region = atlas.findRegion(descriptor.getUri()
					.substring(1));
			textureRegion = region;
		}

		if (textureRegion == null) {
			try {
				fh = ((AssetHandlerImpl) assetHandler).getFileHandle(descriptor
						.getUri());
				pixmap = new Pixmap(fh);
			} catch (Exception e) {
				// TODO Load a default error image.
				logger.warn("Cound not load image for descriptor: "
						+ descriptor, e);
				pixmap = new Pixmap(64, 64, Pixmap.Format.RGB565);
			}
			Texture texture = new Texture(pixmap);
			textureRegion = new TextureRegion(texture);
		}
		textureRegion.flip(false, true);
		return true;
	}

	@Override
	public boolean contains(int x, int y) {
		if (x > 0 && y > 0 && x < getWidth() && y < getHeight()) {
			int alpha = pixmap.getPixel(x, y) & 255;
			return alpha > 128;
		}
		return false;
	}

	@Override
	public RuntimeDrawable<?> getDrawable(int time, List<String> states,
			int level) {
		return this;
	}

	@Override
	public int getWidth() {
		return Math.abs(textureRegion.getRegionWidth());
	}

	@Override
	public int getHeight() {
		return Math.abs(textureRegion.getRegionHeight());
	}

	@Override
	public void freeMemory() {
		if (isLoaded()) {
			super.freeMemory();
			if (textureRegion.getTexture() != null) {
				textureRegion.getTexture().dispose();
			}
			textureRegion = null;
			pixmap.dispose();
			pixmap = null;
		}
	}

	public void render(GdxCanvas batch) {
		batch.draw(textureRegion, 0, 0);
	}

	@Override
	public void refresh() {
		FileHandle fh = ((AssetHandlerImpl) assetHandler)
				.getFileHandle(descriptor.getUri());
		if (!this.fh.path().equals(fh.path())) {
			this.freeMemory();
			this.loadAsset();
		}
	}

	public Texture getTextureHandle() {
		if (textureRegion != null) {
			return textureRegion.getTexture();
		}
		return null;
	}

}