com.cmein.tilemap.utils.TileSetLayout.java Source code

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Here is the source code for com.cmein.tilemap.utils.TileSetLayout.java

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/*
 * Copyright 2010 David Fraska (dfraska@gmail.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
 * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package com.cmein.tilemap.utils;

import java.awt.image.BufferedImage;
import java.io.IOException;

import javax.imageio.ImageIO;

import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.g2d.tiled.TileSet;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.utils.IntMap;

/**
 * Contains extra information that can only be calculated after a Tiled Map's tile set images are loaded.
 * @author David Fraska
 * */
public class TileSetLayout {

    public final BufferedImage image;
    private final IntMap<Vector2> imageTilePositions;
    private int numRows;
    private int numCols;
    public final int numTiles;
    public final TileSet tileSet;

    /**
     * Constructs a Tile Set layout. The tile set image contained in the baseDir should be the original tile set images before
     * being processed by {@link TiledMapPacker} (the ones actually read by Tiled).
     * @param tileSet the tile set to process
     * @param baseDir the directory in which the tile set image is stored
     * */
    TileSetLayout(TileSet tileSet, FileHandle baseDir) throws IOException {
        this.tileSet = tileSet;
        image = ImageIO.read(baseDir.child(tileSet.imageName).read());

        imageTilePositions = new IntMap<Vector2>();

        // fill the tile regions
        int x, y, tile = 0;
        numRows = 0;
        numCols = 0;
        for (y = tileSet.margin; y < image.getHeight() - tileSet.margin; y += tileSet.tileHeight
                + tileSet.spacing) {
            for (x = tileSet.margin; x < image.getWidth() - tileSet.margin; x += tileSet.tileWidth
                    + tileSet.spacing) {
                if (y == tileSet.margin)
                    numCols++;
                imageTilePositions.put(tile, new Vector2(x, y));
                tile++;
            }
            numRows++;
        }

        numTiles = numRows * numCols;
    }

    public int getNumRows() {
        return numRows;
    }

    public int getNumCols() {
        return numCols;
    }

    /** Returns the location of the tile in {@link TileSetLayout#image} */
    public Vector2 getLocation(int tile) {
        return imageTilePositions.get(tile - tileSet.firstgid);
    }
}