1 files changed, 12 insertions, 2 deletions
diff --git a/servo/components/style/values/computed/font.rs b/servo/components/style/values/computed/font.rs
index de0a5e372b..e492584f75 100644
--- a/servo/components/style/values/computed/font.rs
+++ b/servo/components/style/values/computed/font.rs
@@ -8,7 +8,7 @@ use crate::parser::{Parse, ParserContext};
 use crate::values::animated::ToAnimatedValue;
 use crate::values::computed::{
     Angle, Context, Integer, Length, NonNegativeLength, NonNegativeNumber, Number, Percentage,
-    ToComputedValue,
+    ToComputedValue, Zoom,
 };
 use crate::values::generics::font::{
     FeatureTagValue, FontSettings, TaggedFontValue, VariationValue,
@@ -278,6 +278,16 @@ impl FontSize {
         self.used_size.0
     }
 
+    /// Apply zoom to the font-size. This is usually done by ToComputedValue.
+    #[inline]
+    pub fn zoom(&self, zoom: Zoom) -> Self {
+        Self {
+            computed_size: NonNegative(Length::new(zoom.zoom(self.computed_size.0.px()))),
+            used_size: NonNegative(Length::new(zoom.zoom(self.used_size.0.px()))),
+            keyword_info: self.keyword_info,
+        }
+    }
+
     #[inline]
     /// Get default value of font size.
     pub fn medium() -> Self {
@@ -1359,7 +1369,7 @@ impl ToResolvedValue for LineHeight {
             context.style.get_font(),
             wm,
             Some(context.element_info.element),
-        ))
+        ).to_resolved_value(context))
     }
 
     #[inline]