Yeah not sure I think I was going to put something really simple together to start. What I was going to do is the following:
- Read the atlas file
- Cycle through each texture in the atlas
- For each one create a Pixmap Pixmaps
- Use PixmapIO to write out each individual image.
I won't have time to work on this for a couple weeks. If I get something working I will make sure to share. Probably build it as a simple command line tool for starters.
I had some time today to work on this. It needs some optimization and I am not reading the format yet from the atlas file but here is a rough draft. I am going to be offline for a week, but I will check in when I get back.
/*******************************************************************************
* 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.tools.texturepacker;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.g2d.TextureAtlas.TextureAtlasData;
import com.badlogic.gdx.graphics.g2d.TextureAtlas.TextureAtlasData.Region;
/** @author Nathan Sweet, Michael Bazos */
public class TextureUnpacker {
/**
* @param output
* Directory where the images will be written.
* @throws IOException
*/
static public void process(TextureAtlasData atlasData, String output)
throws IOException {
for (Region region : atlasData.getRegions()) {
BufferedImage src = ImageIO.read(region.page.textureFile.file());
BufferedImage subimage = null;
System.out.println(String.format("processing image for %s x[%s] y[%s] w[%s] h[%s], rotate[%s]", region.name, region.left, region.top, region.width, region.height, region.rotate));
if(region.rotate){
BufferedImage unRotatedImage = src.getSubimage(region.left, region.top, region.height, region.width);
double rotationRequired = Math.toRadians(90.0);
double locationX = unRotatedImage.getWidth() / 2;
double locationY = unRotatedImage.getHeight() / 2;
AffineTransform tx = AffineTransform.getRotateInstance(rotationRequired, locationX, locationY);
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);
subimage = op.filter(unRotatedImage, subimage);
}else {
subimage = src.getSubimage(region.left, region.top, region.width, region.height);
}
ImageIO.write(subimage, "PNG", new FileOutputStream(output + File.separator + region.name + ".png"));
}
}
static public void main(String[] args) throws Exception {
String input = null, output = null;
switch (args.length) {
case 2:
output = args[1];
case 1:
input = args[0];
break;
default:
System.out.println("Usage: inputDir [outputDir] [packFileName]");
System.exit(0);
}
FileHandle inputFileHandle = new FileHandle(input);
File inputFile = inputFileHandle.file();
if (output == null) {
File outputFile = new File(inputFile.getParentFile(), "output");
if(!outputFile.exists()) {
outputFile.mkdir();
}
output = outputFile.getAbsolutePath();
}
TextureAtlasData atlasData = new TextureAtlasData(inputFileHandle, inputFileHandle.parent(), false);
process(atlasData, output);
}
}
