CWindowMaskGUI *mask_gui = (CWindowMaskGUI*) gui->tool_panel->tool_gui;
float cx = get_cursor_x(), cy = get_cursor_y();
canvas_to_output(mwindow->edl, 0, cx, cy);
CWindowMaskGUI *mask_gui = (CWindowMaskGUI*) gui->tool_panel->tool_gui;
float cx = get_cursor_x(), cy = get_cursor_y();
canvas_to_output(mwindow->edl, 0, cx, cy);