+ for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
+ p_dst_end -= i_pitch, p_src += i_visible_pitch )
+ vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
+ else
+ for( ; p_dst < p_dst_end;
+ p_dst += i_pitch, p_src += i_visible_pitch )
+ vlc_memcpy( p_dst, p_src, i_visible_pitch );