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fonts: Add support for WOFF2 and properly load web fonts from @imports (#31879)

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This change also makes two fixes that are necessary to get WOFF2 fonts
working:

1. It adds support for loading web fonts from stylesheets included via
   @import rules.
2. It ensure that when web fonts are loaded synchronusly they invalidate
   the font cache. This led to incorrect font rendering when running
   tests before.

Fixes #31598.
This commit is contained in:
Martin Robinson 2024-03-26 21:31:52 +01:00 • committed by GitHub
parent b55d0a2053
commit 8dece05980
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GPG key ID: B5690EEEBB952194
100 changed files with 196 additions and 218 deletions
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86
components/layout_thread_2020/lib.rs
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@ -298,6 +298,38 @@ impl Layout for LayoutThread {
fn current_epoch(&self) -> Epoch {
self.epoch.get()
}
fn load_web_fonts_from_stylesheet(&self, stylesheet: ServoArc<Stylesheet>) {
let guard = stylesheet.shared_lock.read();
self.load_all_web_fonts_from_stylesheet_with_guard(&stylesheet, &guard);
}
fn add_stylesheet(
&mut self,
stylesheet: ServoArc<Stylesheet>,
before_stylesheet: Option<ServoArc<Stylesheet>>,
) {
let guard = stylesheet.shared_lock.read();
self.load_all_web_fonts_from_stylesheet_with_guard(&stylesheet, &guard);
match before_stylesheet {
Some(insertion_point) => self.stylist.insert_stylesheet_before(
DocumentStyleSheet(stylesheet.clone()),
DocumentStyleSheet(insertion_point),
&guard,
),
None => self
.stylist
.append_stylesheet(DocumentStyleSheet(stylesheet.clone()), &guard),
}
}
fn remove_stylesheet(&mut self, stylesheet: ServoArc<Stylesheet>) {
// TODO(mrobinson): This should also unload web fonts from the FontCacheThread.
let guard = stylesheet.shared_lock.read();
self.stylist
.remove_stylesheet(DocumentStyleSheet(stylesheet.clone()), &guard);
}
}
enum Request {
@ -451,10 +483,7 @@ impl LayoutThread {
Request::FromFontCache => {
let _rw_data = rw_data.lock();
self.outstanding_web_fonts.fetch_sub(1, Ordering::SeqCst);
font_context::invalidate_font_caches();
self.script_chan
.send(ConstellationControlMsg::WebFontLoaded(self.id))
.unwrap();
self.handle_web_font_loaded();
},
};
}
@ -466,26 +495,6 @@ impl LayoutThread {
possibly_locked_rw_data: &mut RwData<'a, 'b>,
) {
match request {
Msg::AddStylesheet(stylesheet, before_stylesheet) => {
let guard = stylesheet.shared_lock.read();
self.handle_add_stylesheet(&stylesheet, &guard);
match before_stylesheet {
Some(insertion_point) => self.stylist.insert_stylesheet_before(
DocumentStyleSheet(stylesheet.clone()),
DocumentStyleSheet(insertion_point),
&guard,
),
None => self
.stylist
.append_stylesheet(DocumentStyleSheet(stylesheet.clone()), &guard),
}
},
Msg::RemoveStylesheet(stylesheet) => {
let guard = stylesheet.shared_lock.read();
self.stylist
.remove_stylesheet(DocumentStyleSheet(stylesheet.clone()), &guard);
},
Msg::SetQuirksMode(mode) => self.handle_set_quirks_mode(mode),
Msg::GetRPC(response_chan) => {
response_chan
@ -542,7 +551,11 @@ impl LayoutThread {
reports_chan.send(reports);
}
fn handle_add_stylesheet(&self, stylesheet: &Stylesheet, guard: &SharedRwLockReadGuard) {
fn load_all_web_fonts_from_stylesheet_with_guard(
&self,
stylesheet: &Stylesheet,
guard: &SharedRwLockReadGuard,
) {
// Find all font-face rules and notify the font cache of them.
// GWTODO: Need to handle unloading web fonts.
if stylesheet.is_effective_for_device(self.stylist.device(), &guard) {
@ -554,11 +567,23 @@ impl LayoutThread {
&self.font_cache_sender,
self.debug.load_webfonts_synchronously,
);
self.outstanding_web_fonts
.fetch_add(newly_loading_font_count, Ordering::SeqCst);
if !self.debug.load_webfonts_synchronously {
self.outstanding_web_fonts
.fetch_add(newly_loading_font_count, Ordering::SeqCst);
} else if newly_loading_font_count > 0 {
self.handle_web_font_loaded();
}
}
}
fn handle_web_font_loaded(&self) {
font_context::invalidate_font_caches();
self.script_chan
.send(ConstellationControlMsg::WebFontLoaded(self.id))
.unwrap();
}
/// Sets quirks mode for the document, causing the quirks mode stylesheet to be used.
fn handle_set_quirks_mode<'a, 'b>(&mut self, quirks_mode: QuirksMode) {
self.stylist.set_quirks_mode(quirks_mode);
@ -656,7 +681,10 @@ impl LayoutThread {
for stylesheet in &ua_stylesheets.user_or_user_agent_stylesheets {
self.stylist
.append_stylesheet(stylesheet.clone(), &ua_or_user_guard);
self.handle_add_stylesheet(&stylesheet.0, &ua_or_user_guard);
self.load_all_web_fonts_from_stylesheet_with_guard(
&stylesheet.0,
&ua_or_user_guard,
);
}
if self.stylist.quirks_mode() != QuirksMode::NoQuirks {
@ -664,7 +692,7 @@ impl LayoutThread {
ua_stylesheets.quirks_mode_stylesheet.clone(),
&ua_or_user_guard,
);
self.handle_add_stylesheet(
self.load_all_web_fonts_from_stylesheet_with_guard(
&ua_stylesheets.quirks_mode_stylesheet.0,
&ua_or_user_guard,
);