int minx=30;
int miny=0;
int maxx=300;
int maxy=120;
ex.setRenderBounds(new Envelope(minx, maxx, miny, maxy));
ex.render();
Platform.getJobManager().join(map.getRenderManager(), new NullProgressMonitor());
showImage( "testRenderEnvelopeIProgressMonitor", image); //$NON-NLS-1$
testImage(image, false, minx, 512-maxy,maxx,512-miny );