Java tutorial
import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class ImageDataManipuatation { public static void main(String[] args) { final Display display = new Display(); final Shell shell = new Shell(display); shell.setText("Canvas Example"); shell.setLayout(new FillLayout()); Canvas canvas = new Canvas(shell, SWT.NONE); canvas.addPaintListener(new PaintListener() { public void paintControl(PaintEvent e) { Image image = new Image(display, "yourFile.gif"); ImageData data = image.getImageData(); data.setPixel(5, 5, 5); Image anotherImage = new Image(display, data); e.gc.drawImage(anotherImage, 10, 10); image.dispose(); } }); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } }