Add a `transformed()` method to `Outline` and `Contour`.

content/src/outline.rs

@@ -178,6 +178,11 @@ impl Outline {
         self.bounds = new_bounds.unwrap_or_else(|| RectF::default());
     }
 
+    pub fn transformed(mut self, transform: &Transform2F) -> Outline {
+        self.transform(transform);
+        self
+    }
+
     pub fn apply_perspective(&mut self, perspective: &Perspective) {
         let mut new_bounds = None;
         for contour in &mut self.contours {
@@ -614,6 +619,12 @@ impl Contour {
         }
     }
 
+    #[inline]
+    pub fn transformed(mut self, transform: &Transform2F) -> Contour {
+        self.transform(transform);
+        self
+    }
+
     pub fn apply_perspective(&mut self, perspective: &Perspective) {
         for (point_index, point) in self.points.iter_mut().enumerate() {
             *point = *perspective * *point;