From 258217a36904a191490346ea5e706b0eeb048b23 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Mon, 4 Feb 2019 16:57:12 +0100
Subject: [PATCH] style: Generate combined transform just once.

Differential Revision: https://phabricator.services.mozilla.com/D18567
---
 components/style/properties/cascade.rs    | 4 ++++
 components/style/properties/gecko.mako.rs | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/components/style/properties/cascade.rs b/components/style/properties/cascade.rs
index 7fdbb7177e9..d881524deb5 100644
--- a/components/style/properties/cascade.rs
+++ b/components/style/properties/cascade.rs
@@ -629,6 +629,10 @@ impl<'a, 'b: 'a> Cascade<'a, 'b> {
 
         #[cfg(feature = "gecko")]
         {
+            if let Some(display) = builder.get_box_if_mutated() {
+                display.generate_combined_transform();
+            }
+
             if let Some(bg) = builder.get_background_if_mutated() {
                 bg.fill_arrays();
             }
diff --git a/components/style/properties/gecko.mako.rs b/components/style/properties/gecko.mako.rs
index 9bb95ba9dfe..5dc8a0f6619 100644
--- a/components/style/properties/gecko.mako.rs
+++ b/components/style/properties/gecko.mako.rs
@@ -3023,6 +3023,11 @@ fn static_assert() {
                           will-change shape-outside contain touch-action
                           translate scale""" %>
 <%self:impl_trait style_struct_name="Box" skip_longhands="${skip_box_longhands}">
+    #[inline]
+    pub fn generate_combined_transform(&mut self) {
+        unsafe { bindings::Gecko_StyleDisplay_GenerateCombinedTransform(&mut self.gecko) };
+    }
+
     #[inline]
     pub fn set_display(&mut self, v: longhands::display::computed_value::T) {
         self.gecko.mDisplay = v;