bool DoGetPixel(wxCoord x1, wxCoord y1, wxColour *col) const;
void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
bool DoGetPixel(wxCoord x1, wxCoord y1, wxColour *col) const;
void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);