[news.eclipse.platform.swt] Writing text in a image and save

["Gilberto Martins" <gilbertomsn@xxxxxxxxx>]

Hi all,

I want to write text in an existent image and save the image. The following 
example located at 
http://www.eclipse.org/articles/Article-SWT-images/graphics-resources.html#Manipulating%20Image%20Data 
shows as write text in a image, but only for shows on the screen:
GC gc = new GC(image);
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.drawText("I've been drawn on",0,0,true);
gc.dispose();

How I can get the GC object and save? Or have another way to write the text 
in the image and save later?

Thanks and best regards!
Gilberto Martins dos Santos Neto
System Analyst
gilbertomsn@xxxxxxxxx