// Rotate
fi-icon-r($degrees, $rotation){
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=" + $rotation + ")"
  transform: rotate($degrees)
}

fi-icon-f($horiz, $vert, $rotation){
  -ms-filter: 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + $rotation + ', mirror=1)'
  transform: scale($horiz, $vert)
}

.{$fi-css-prefix}-r-45 
  fi-icon-r(45deg, 1)
.{$fi-css-prefix}-r-90 
  fi-icon-r(90deg, 1)
.{$fi-css-prefix}-r-135 
  fi-icon-r(135deg, 1)
.{$fi-css-prefix}-r-180 
  fi-icon-r(180deg, 2)
.{$fi-css-prefix}-r-225 
  fi-icon-r(225deg, 2)
.{$fi-css-prefix}-r-270 
  fi-icon-r(270deg, 3)
.{$fi-css-prefix}-r-315 
  fi-icon-r(315deg, 3)

.{$fi-css-prefix}-f-horizontal 
  fi-icon-f(-1, 1, 0)
.{$fi-css-prefix}-f-vertical 
  fi-icon-f(1, -1, 2)