m_userOffset = CGContextConvertSizeToUserSpace( m_cg, CGSizeMake( 0.5 , 0.5 ) );
CGContextTranslateCTM( m_cg, m_userOffset.width , m_userOffset.height );
}
m_userOffset = CGContextConvertSizeToUserSpace( m_cg, CGSizeMake( 0.5 , 0.5 ) );
CGContextTranslateCTM( m_cg, m_userOffset.width , m_userOffset.height );
}