Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.device.swt/src/org/eclipse/birt/chart/device/swt/SwtRendererImpl.java
{
			x1 = x2 = r.x;
			y1 = r.y;
			y2 = r.y + r.height;
		}
		else if ( dAngleInDegrees > 0 )
		{
			x1 = r.x;
			y1 = r.y + r.height;
			x2 = r.x + r.width;
			y2 = r.y;
		}
		else
		{
			x1 = r.x;
			y1 = r.y;
			x2 = r.x + r.width;
			y2 = r.y + r.height;
		}
		
		_gc.setForeground( cFG );
		_gc.setBackground( cBG );
		R31Enhance.setAlpha( _gc, g );
		Pattern pattern = new Pattern( _gc.getDevice( ),
				x1,
				y1,
				x2,
				y2,
				cFG,
				cdStart.getTransparency( ),