/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* 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.badlogic.gdx.graphics.g2d.tiled;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.MathUtils;
/**
* Contains an atlas of tiles by tile id for use with {@link TileMapRenderer} It does not need to be loaded with packed
* files. Just plain textures.
*
* @author Tomas Lazaro
*/
public class SimpleTileAtlas extends TileAtlas {
/**
* Creates a TileAtlas for use with {@link TileMapRenderer}.
*
* @param map
* The tiled map
* @param inputDir
* The directory containing all needed textures in the map
*/
public SimpleTileAtlas(TiledMap map, FileHandle inputDir) {
for (TileSet set : map.tileSets) {
Pixmap pixmap = new Pixmap(inputDir.child(set.imageName));
int originalWidth = pixmap.getWidth();
int originalHeight = pixmap.getHeight();
if (!MathUtils.isPowerOfTwo(originalWidth) || !MathUtils.isPowerOfTwo(originalHeight)) {
final int width = MathUtils.nextPowerOfTwo(originalWidth);
final int height = MathUtils.nextPowerOfTwo(originalHeight);
Pixmap potPixmap = new Pixmap(width, height, pixmap.getFormat());
potPixmap.drawPixmap(pixmap, 0, 0, 0, 0, width, height);
pixmap.dispose();
pixmap = potPixmap;
}
Texture texture = new Texture(pixmap);
pixmap.dispose();
textures.add(texture);
int idx = 0;
TextureRegion[][] regions = split(texture, originalWidth, originalHeight, map.tileWidth, map.tileHeight,
set.spacing, set.margin);
for (int y = 0; y < regions[0].length; y++) {
for (int x = 0; x < regions.length; x++) {
regionsMap.put(idx++ + set.firstgid, regions[x][y]);
}
}
}
}
private static TextureRegion[][] split(Texture texture, int totalWidth, int totalHeight, int width, int height,
int spacing, int margin) {
// TODO add padding support
int xSlices = (totalWidth - margin) / (width + spacing);
int ySlices = (totalHeight - margin) / (height + spacing);
TextureRegion[][] res = new TextureRegion[xSlices][ySlices];
for (int x = 0; x < xSlices; x++) {
for (int y = 0; y < ySlices; y++) {
res[x][y] = new TextureRegion(texture, margin + x * (width + spacing), margin + y * (height + spacing),
width, height);
}
}
return res;
}
}