149             push(mask, &mut stack, start_x_l, start_x_r, start_point.y as usize, dir);

   149             push(mask, &mut stack, start_x_l, start_x_r, start_point.y as usize, dir);

   150         }

   150         }

   151 

   151 

   152         while let Some((mut xl, mut xr, y, dir)) = stack.pop() {

   152         while let Some((mut xl, mut xr, y, dir)) = stack.pop() {

   153             let row = &mut self.pixels[y][..];

   153             let row = &mut self.pixels[y][..];

   156             {

   155             {

   157                 xl -= 1;

   156                 xl -= 1;

   158             }

   157             }

   159 

   158 

   162             {

   160             {

   163                 xr += 1;

   161                 xr += 1;

   164             }

   162             }

   165 

   163 

   166             while xl < xr {

   164             while xl < xr {

   169                     xl += 1;

   167                     xl += 1;

   170                 }

   168                 }

   171 

   169 

   172                 let x = xl;

   170                 let x = xl;

   173 

   171 

   175                 {

   173                 {

   176                     row[xl] = fill_value;

   174                     row[xl] = fill_value;

   177                     xl += 1;

   175                     xl += 1;

   178                 }

   176                 }

   179 

   177