anchor.diff:            }
           }
           return dst;
  -        break;
         case 2: // 180 deg.
           Image dst = new Image(src.width, src.height, src.format);
           for (int y = 0; y < dst.height; ++y) {
  
positive.code:           }
          }
          return dst;
          break;
        case 3: // 270 deg.
          Image dst = new Image(src.height, src.width, src.format);
          for (int y = 0; y < dst.height; ++y) {
  
negative.code:           }
          }
          return dst;
        default: // 0 deg.
          return new Image.from(src);
      }
  