ScrollingGraphicalViewer graphicalViewer= ...
String saveLocation= ...
		
ScalableFreeformRootEditPart rootEditPart = (ScalableFreeformRootEditPart) graphicalViewer.getEditPartRegistry().get(LayerManager.ID);
IFigure rootFigure = ((LayerManager) rootEditPart).getLayer( LayerConstants.PRINTABLE_LAYERS);
Rectangle rootFigureBounds = rootFigure.getBounds();
Control figureCanvas = graphicalViewer.getControl();
// ENLARGE figureCanvas
org.eclipse.swt.graphics.Rectangle scBounds = figureCanvas.getBounds(); // store original
org.eclipse.swt.graphics.Rectangle swRect = new org.eclipse.swt.graphics.Rectangle(rootFigureBounds.x,rootFigureBounds.y,rootFigureBounds.width,rootFigureBounds.height);
figureCanvas.setBounds(swRect); // I guess that negative x,y will not work for SWT control
// Back to the original code		
Image img = new Image(Display.getDefault(), rootFigureBounds.width, rootFigureBounds.height);  // tried to enlarge this with no success		
//Image img = new Image(Display.getDefault(), swRect); //this won't work either
GC imageGC = new GC(img);
figureCanvas.print(imageGC); 
ImageLoader imgLoader = new ImageLoader();
imgLoader.save(f.getAbsolutePath(), SWT.IMAGE_BMP);
// restore the bounds
figureCanvas.setBounds(scBounds);
// dispose
imageGC.dispose();
img.dispose();	

final ScrollingGraphicalViewer viewer = ...
final String location = ...

final LayerManager layerManager = (LayerManager) viewer.getEditPartRegistry().get(LayerManager.ID);
final IFigure printableLayer = layerManager.getLayer(LayerConstants.PRINTABLE_LAYERS);
final Rectangle printableLayerBounds = printableLayer.getBounds();

final Image img = new Image(Display.getDefault(), printableLayerBounds.width, printableLayerBounds.height);

final GC imageGC = new GC(img);
final SWTGraphics swtGraphics = new SWTGraphics(imageGC);
swtGraphics.translate(printableLayerBounds.getLocation().negate());

printableLayer.paint(swtGraphics);
imageGC.dispose();

final ImageLoader imgLoader = new ImageLoader();
imgLoader.data = new ImageData[] { img.getImageData() };
imgLoader.save(location, SWT.IMAGE_BMP);

img.dispose();