CGContextTranslateCTM( m_overlayContext, 0, m_height+m_y );
CGContextScaleCTM( m_overlayContext, 1, -1 );
wxASSERT_MSG( err == noErr , _("Couldn't init the context on the overlay window") );
CGContextTranslateCTM( m_overlayContext, 0, m_height+m_y );
CGContextScaleCTM( m_overlayContext, 1, -1 );
wxASSERT_MSG( err == noErr , _("Couldn't init the context on the overlay window") );