6     bottom_right: BackendCoord,  in draw_rect()
13     let (upper_left, bottom_right) = (  in draw_rect()
15             upper_left.0.min(bottom_right.0),  in draw_rect()
16             upper_left.1.min(bottom_right.1),  in draw_rect()
19             upper_left.0.max(bottom_right.0),  in draw_rect()
20             upper_left.1.max(bottom_right.1),  in draw_rect()
25         if bottom_right.0 - upper_left.0 < bottom_right.1 - upper_left.1 {  in draw_rect()
26             for x in upper_left.0..=bottom_right.0 {  in draw_rect()
27                 check_result!(b.draw_line((x, upper_left.1), (x, bottom_right.1), style));  in draw_rect()
30             for y in upper_left.1..=bottom_right.1 {  in draw_rect()
31                 check_result!(b.draw_line((upper_left.0, y), (bottom_right.0, y), style));  in draw_rect()
37             (upper_left.0, bottom_right.1),  in draw_rect()
42             (bottom_right.0, upper_left.1),  in draw_rect()
46             (bottom_right.0, bottom_right.1),  in draw_rect()
47             (upper_left.0, bottom_right.1),  in draw_rect()
51             (bottom_right.0, bottom_right.1),  in draw_rect()
52             (bottom_right.0, upper_left.1),  in draw_rect()