package de.exware.scan;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;

import de.exware.util.rcp.RCPUtilities;

public class TiffTool
{
    public static void concatTiffs(File target, List<File> tiffs) throws IOException
    {
        concatTiffs(target, tiffs.toArray(new File[tiffs.size()]));
    }
    
    public static void concatTiffs(File target, File ... tiffs) throws IOException
    {
        target.delete();
        if(tiffs.length == 1)
        {
            RCPUtilities.copy(tiffs[0], target, true);
        }
        else
        {
            Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("tiff");
            ImageWriter writer = writers.next();
            ImageOutputStream out = ImageIO.createImageOutputStream(target);
            writer.setOutput(out);
            ImageWriteParam param = writer.getDefaultWriteParam();
            param.setCompressionMode(param.MODE_EXPLICIT);
            param.setCompressionType("JPEG");
            writer.prepareWriteSequence(null);
            for(int i=0;i<tiffs.length;i++)
            {
                BufferedImage raster = ImageIO.read(tiffs[i]);
                IIOImage image = new IIOImage(raster, null, null);
                writer.writeToSequence(image, param);
            }
            writer.endWriteSequence();
            writer.dispose();
        }
    }
    
    public static void main(String[] args) throws IOException
    {
        concatTiffs(new File("/tmp/target.tiff"), new File("/tmp/img001.tif"), new File("/tmp/img002.tif"));
    }
}