//! Marks the end of a scanline
/*! Takes the data that was put at the address returned to by start_scanline()
//! Marks the end of a scanline
/*! Takes the data that was put at the address returned to by start_scanline()
** \return \c true on success, \c false on failure.
** \see start_scanline()
*/
virtual bool end_scanline()=0;
** \return \c true on success, \c false on failure.
** \see start_scanline()
*/
virtual bool end_scanline()=0;