+ void Init( wxDC *dc, const wxBitmap &buffer ) {
+ wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
+ _T("wxBufferedDC already initialised") );
+ m_dc = dc;
+ m_buffer = buffer;
+ SelectObject( m_buffer );
+ }
+
+ void Init( wxDC *dc, const wxSize &area ) {
+ wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
+ _T("wxBufferedDC already initialised") );
+ m_dc = dc;
+ m_buffer = wxBitmap( area.GetWidth(), area.GetHeight() );
+ SelectObject( m_buffer );
+ }
+
+ void UnMask() {
+ wxASSERT_MSG( m_dc != 0, _T("No low level DC associated with buffer (anymore)") );
+ m_dc->Blit( 0, 0, m_buffer.GetWidth(), m_buffer.GetHeight(), this, 0, 0 );
+ m_dc = 0;
+ }