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A small Java library to load Tiled maps.
There is a newer version: 1.4.2
/*-
 * #%L
 * This file is part of libtiled-java.
 * %%
 * Copyright (C) 2004 - 2016 Thorbjørn Lindeijer 
 * %%
 * 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 HOLDERS 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.
 * #L%
 */
package tiled.view;

import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import tiled.core.Map;
import tiled.core.Tile;
import tiled.core.TileLayer;

/**
 * The orthogonal map renderer. This is the most basic map renderer, dealing
 * with maps that use rectangular tiles.
 *
 * @author Thorbjørn Lindeijer
 * @author Adam Turk
 * @version 0.17
 */
public class OrthogonalRenderer implements MapRenderer {

    private final Map map;

    /**
     * Constructor for OrthogonalRenderer.
     *
     * @param map a {@link tiled.core.Map} object.
     */
    public OrthogonalRenderer(Map map) {
        this.map = map;
    }

    /** {@inheritDoc} */
    @Override
    public Dimension getMapSize() {
        return new Dimension(
                map.getWidth() * map.getTileWidth(),
                map.getHeight() * map.getTileHeight());
    }

    /** {@inheritDoc} */
    @Override
    public void paintTileLayer(Graphics2D g, TileLayer layer) {
        final Rectangle clip = g.getClipBounds();
        final int tileWidth = map.getTileWidth();
        final int tileHeight = map.getTileHeight();
        final Rectangle bounds = layer.getBounds();

        g.translate(bounds.x * tileWidth, bounds.y * tileHeight);
        clip.translate(-bounds.x * tileWidth, -bounds.y * tileHeight);

        clip.height += map.getTileHeightMax();

        final int startX = Math.max(0, clip.x / tileWidth);
        final int startY = Math.max(0, clip.y / tileHeight);
        final int endX = Math.min(layer.getWidth(),
                (int) Math.ceil(clip.getMaxX() / tileWidth));
        final int endY = Math.min(layer.getHeight(),
                (int) Math.ceil(clip.getMaxY() / tileHeight));

        for (int x = startX; x < endX; ++x) {
            for (int y = startY; y < endY; ++y) {
                final Tile tile = layer.getTileAt(x, y);
                if (tile == null) {
                    continue;
                }
                final Image image = tile.getImage();
                if (image == null) {
                    continue;
                }

                g.drawImage(
                        image,
                        x * tileWidth,
                        (y + 1) * tileHeight - image.getHeight(null),
                        null);
            }
        }

        g.translate(-bounds.x * tileWidth, -bounds.y * tileHeight);
    }
}