/*
* Tiled Map Editor, (c) 2004-2008
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Adam Turk <aturk@biggeruniverse.com>
* Bjorn Lindeijer <bjorn@lindeijer.nl>
*/
package tiled.io;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.ImageLoader;
import org.eclipse.swt.widgets.Display;
/**
* This class provides functions to help out with saving/loading images.
*
* @version $Id$
*/
public class ImageHelper
{
/**
* Converts an image to a PNG stored in a byte array.
*
* @param image
* @return a byte array with the PNG data
*/
static public byte[] imageToPNG(Image image) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
BufferedImage buffer = new BufferedImage(
image.getWidth(null), image.getHeight(null),
BufferedImage.TYPE_INT_ARGB);
buffer.createGraphics().drawImage(image, 0, 0, null);
ImageIO.write(buffer, "PNG", baos);
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
return baos.toByteArray();
}
/**
* Converts a byte array into an image. The byte array must include the
* image header, so that a decision about format can be made.
*
* @param imageData The byte array of the data to convert.
* @return Image The image instance created from the byte array
* @throws IOException
* @see java.awt.Toolkit#createImage(byte[] imagedata)
*/
static public BufferedImage bytesToImage(byte[] imageData) throws IOException {
return ImageIO.read(new ByteArrayInputStream(imageData));
}
static public org.eclipse.swt.graphics.Image bytesToSWTImage(byte[] imageData) throws IOException {
return new org.eclipse.swt.graphics.Image(Display.getDefault(),new ByteArrayInputStream(imageData));
}
/**
* This function loads the image denoted by <code>file</code>. This
* supports PNG, GIF, JPG, and BMP (in 1.5).
*
* @param file
* @return the (partially) loaded image
* @throws IOException
*/
static public BufferedImage loadImageFile(File file) throws IOException {
return ImageIO.read(file);
}
public static byte[] imageToPNG(org.eclipse.swt.graphics.Image image) {
ImageLoader loader = new ImageLoader();
loader.data = new ImageData[] {image.getImageData()};
ByteArrayOutputStream stream = new ByteArrayOutputStream();
loader.save(stream, SWT.IMAGE_PNG);
return stream.toByteArray();
}
}