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/SwtDisplayServer.java
public Object getColor( ColorDefinition cd )
	{
		return new Color( _d, cd.getRed( ), cd.getGreen( ), cd.getBlue( ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.devices.IDisplayServer#getDpiResolution()
	 */
	public final int getDpiResolution( )
	{
		if ( iDpiResolution == 0 )
		{
			( (Display) _d ).syncExec( new Runnable( ) {
				public void run( )
				{
					iDpiResolution = _d.getDPI( ).x;
				}
			} );
		}
		return iDpiResolution;
	}
	public final void setDpiResolution( int dpi )
	{
		iDpiResolution = dpi;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#loadImage(java.net.URL)