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servo/components/fonts/platform/mod.rs
Martin Robinson 0553789d48
fonts: Instantiate system fonts using system font loaders (#33747) 
System fonts used to be instantiated using the system font loader and
this change restores that behavior. In addition, on macOS and FreeType
platforms font data for system fonts is loaded using memory mapping. The
benefit is that system font loaders typically are able to cache fonts in
system memory (using memory mapping, for instance) and we'd like to load
them in a the way most compatible with other applications.

On my Linux system, this manages to get the overhead of loading a very
large font down from 10ms to approximately 1ms. Subsequent runs show
even less overhead. We've measured similar gains on macOS systems.

Currently, system font data must be loaded into memory manually for
canvas and this is unlikely to change even with a switch to `vello`. The
use of explicit memmory mapping should help in this case -- though it
probably won't be possible to use this properly on macOS and Windows if
we ever want to load fonts from TTCs properly.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
2024-10-10 23:09:51 +00:00

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#[cfg(any(target_os = "linux", target_os = "macos"))]
use base::text::{UnicodeBlock, UnicodeBlockMethod};
#[cfg(any(target_os = "linux", target_os = "macos"))]
use unicode_script::Script;
#[cfg(any(target_os = "linux", target_os = "android"))]
pub use crate::platform::freetype::{font, font_list, LocalFontIdentifier};
#[cfg(target_os = "macos")]
pub use crate::platform::macos::{
core_text_font_cache, font, font_list, font_list::LocalFontIdentifier,
};
#[cfg(target_os = "windows")]
pub use crate::platform::windows::{font, font_list, font_list::LocalFontIdentifier};
#[cfg(any(target_os = "linux", target_os = "macos"))]
use crate::FallbackFontSelectionOptions;
#[cfg(any(target_os = "linux", target_os = "android"))]
pub mod freetype;
#[cfg(target_os = "macos")]
mod macos {
pub mod core_text_font_cache;
pub mod font;
pub mod font_list;
}
#[cfg(target_os = "windows")]
mod windows {
pub mod font;
pub mod font_list;
}
#[cfg(any(target_os = "linux", target_os = "macos"))]
pub(crate) fn add_noto_fallback_families(
options: FallbackFontSelectionOptions,
families: &mut Vec<&'static str>,
) {
// TODO: Need to differentiate between traditional and simplified Han here!
let add_chinese_families = |families: &mut Vec<&str>| {
families.push("Noto Sans CJK HK");
families.push("Noto Sans CJK SC");
families.push("Noto Sans CJK TC");
families.push("Noto Sans HK");
families.push("Noto Sans SC");
families.push("Noto Sans TC");
};
match Script::from(options.character) {
// In most cases, COMMON and INHERITED characters will be merged into
// their context, but if they occur without any specific script context
// we'll just try common default fonts here.
Script::Common | Script::Inherited | Script::Latin | Script::Cyrillic | Script::Greek => {
families.push("Noto Sans");
},
// CJK-related script codes are a bit troublesome because of unification;
// we'll probably just get HAN much of the time, so the choice of which
// language font to try for fallback is rather arbitrary. Usually, though,
// we hope that font prefs will have handled this earlier.
Script::Bopomofo | Script::Han => add_chinese_families(families),
_ => {},
}
if let Some(block) = options.character.block() {
match block {
UnicodeBlock::HalfwidthandFullwidthForms |
UnicodeBlock::EnclosedIdeographicSupplement => add_chinese_families(families),
UnicodeBlock::Adlam => families.push("Noto Sans Adlam"),
UnicodeBlock::Ahom => families.push("Noto Serif Ahom"),
UnicodeBlock::AnatolianHieroglyphs => families.push("Noto Sans AnatoHiero"),
UnicodeBlock::Arabic |
UnicodeBlock::ArabicExtendedA |
UnicodeBlock::ArabicPresentationFormsA |
UnicodeBlock::ArabicPresentationFormsB => {
families.push("Noto Sans Arabic");
families.push("Noto Naskh Arabic");
},
UnicodeBlock::ArabicMathematicalAlphabeticSymbols => {
families.push("Noto Sans Math");
},
UnicodeBlock::Armenian => families.push("Noto Sans Armenian"),
UnicodeBlock::Avestan => families.push("Noto Sans Avestan"),
UnicodeBlock::Balinese => families.push("Noto Sans Balinese"),
UnicodeBlock::Bamum | UnicodeBlock::BamumSupplement => families.push("Noto Sans Bamum"),
UnicodeBlock::BassaVah => families.push("Noto Sans Bassa Vah"),
UnicodeBlock::Batak => families.push("Noto Sans Batak"),
UnicodeBlock::Bengali => families.push("Noto Sans Bengali"),
UnicodeBlock::Bhaiksuki => families.push("Noto Sans Bhaiksuki"),
UnicodeBlock::Brahmi => families.push("Noto Sans Brahmi"),
UnicodeBlock::BraillePatterns => {
// These characters appear to be in DejaVu Serif.
},
UnicodeBlock::Buginese => families.push("Noto Sans Buginese"),
UnicodeBlock::Buhid => families.push("Noto Sans Buhid"),
UnicodeBlock::Carian => families.push("Noto Sans Carian"),
UnicodeBlock::CaucasianAlbanian => families.push("Noto Sans Caucasian Albanian"),
UnicodeBlock::Chakma => families.push("Noto Sans Chakma"),
UnicodeBlock::Cham => families.push("Noto Sans Cham"),
UnicodeBlock::Cherokee | UnicodeBlock::CherokeeSupplement => {
families.push("Noto Sans Cherokee")
},
UnicodeBlock::Coptic => families.push("Noto Sans Coptic"),
UnicodeBlock::Cuneiform | UnicodeBlock::CuneiformNumbersandPunctuation => {
families.push("Noto Sans Cuneiform")
},
UnicodeBlock::CypriotSyllabary => families.push("Noto Sans Cypriot"),
UnicodeBlock::Deseret => families.push("Noto Sans Deseret"),
UnicodeBlock::Devanagari |
UnicodeBlock::DevanagariExtended |
UnicodeBlock::CommonIndicNumberForms => families.push("Noto Sans Devanagari"),
UnicodeBlock::Duployan => families.push("Noto Sans Duployan"),
UnicodeBlock::EgyptianHieroglyphs => families.push("Noto Sans Egyptian Hieroglyphs"),
UnicodeBlock::Elbasan => families.push("Noto Sans Elbasan"),
UnicodeBlock::Ethiopic |
UnicodeBlock::EthiopicExtended |
UnicodeBlock::EthiopicExtendedA |
UnicodeBlock::EthiopicSupplement => families.push("Noto Sans Ethiopic"),
UnicodeBlock::Georgian | UnicodeBlock::GeorgianSupplement => {
families.push("Noto Sans Georgian")
},
UnicodeBlock::Glagolitic | UnicodeBlock::GlagoliticSupplement => {
families.push("Noto Sans Glagolitic")
},
UnicodeBlock::Gothic => families.push("Noto Sans Gothic"),
UnicodeBlock::Grantha => families.push("Noto Sans Grantha"),
UnicodeBlock::Gujarati => families.push("Noto Sans Gujarati"),
UnicodeBlock::Gurmukhi => families.push("Noto Sans Gurmukhi"),
UnicodeBlock::HangulCompatibilityJamo |
UnicodeBlock::HangulJamo |
UnicodeBlock::HangulJamoExtendedA |
UnicodeBlock::HangulJamoExtendedB |
UnicodeBlock::HangulSyllables => {
families.push("Noto Sans KR");
families.push("Noto Sans CJK KR");
},
UnicodeBlock::HanifiRohingya => families.push("Noto Sans Hanifi Rohingya"),
UnicodeBlock::Hanunoo => families.push("Noto Sans Hanunoo"),
UnicodeBlock::Hatran => families.push("Noto Sans Hatran"),
UnicodeBlock::Hebrew => families.push("Noto Sans Hebrew"),
UnicodeBlock::Hiragana |
UnicodeBlock::Katakana |
UnicodeBlock::KatakanaPhoneticExtensions => {
families.push("Noto Sans JP");
families.push("Noto Sans CJK JP");
},
UnicodeBlock::ImperialAramaic => families.push("Noto Sans Imperial Aramaic"),
UnicodeBlock::InscriptionalPahlavi => families.push("Noto Sans Inscriptional Pahlavi"),
UnicodeBlock::InscriptionalParthian => {
families.push("Noto Sans Inscriptional Parthian")
},
UnicodeBlock::Javanese => families.push("Noto Sans Javanese"),
UnicodeBlock::Kaithi => families.push("Noto Sans Kaithi"),
UnicodeBlock::Kannada => families.push("Noto Sans Kannada"),
UnicodeBlock::KayahLi => families.push("Noto Sans Kayah Li"),
UnicodeBlock::Kharoshthi => families.push("Noto Sans Kharoshthi"),
UnicodeBlock::Khmer | UnicodeBlock::KhmerSymbols => families.push("Noto Sans Khmer"),
UnicodeBlock::Khojki => families.push("Noto Sans Khojki"),
UnicodeBlock::Khudawadi => families.push("Noto Sans Khudawadi"),
UnicodeBlock::Lao => families.push("Noto Sans Lao"),
UnicodeBlock::Lepcha => families.push("Noto Sans Lepcha"),
UnicodeBlock::Limbu => families.push("Noto Sans Limbu"),
UnicodeBlock::LinearA => families.push("Noto Sans Linear A"),
UnicodeBlock::LinearBIdeograms | UnicodeBlock::LinearBSyllabary => {
families.push("Noto Sans Linear B")
},
UnicodeBlock::Lisu => families.push("Noto Sans Lisu"),
UnicodeBlock::Lycian => families.push("Noto Sans Lycian"),
UnicodeBlock::Lydian => families.push("Noto Sans Lydian"),
UnicodeBlock::Mahajani => families.push("Noto Sans Mahajani"),
UnicodeBlock::Malayalam => families.push("Noto Sans Malayalam"),
UnicodeBlock::Mandaic => families.push("Noto Sans Mandaic"),
UnicodeBlock::Manichaean => families.push("Noto Sans Manichaean"),
UnicodeBlock::Marchen => families.push("Noto Sans Marchen"),
UnicodeBlock::MeeteiMayek | UnicodeBlock::MeeteiMayekExtensions => {
families.push("Noto Sans Meetei Mayek")
},
UnicodeBlock::MendeKikakui => families.push("Noto Sans Mende Kikakui"),
UnicodeBlock::MeroiticCursive | UnicodeBlock::MeroiticHieroglyphs => {
families.push("Noto Sans Meroitic")
},
UnicodeBlock::Miao => families.push("Noto Sans Miao"),
UnicodeBlock::Modi => families.push("Noto Sans Modi"),
UnicodeBlock::Mongolian | UnicodeBlock::MongolianSupplement => {
families.push("Noto Sans Mongolian")
},
UnicodeBlock::Mro => families.push("Noto Sans Mro"),
UnicodeBlock::Multani => families.push("Noto Sans Multani"),
UnicodeBlock::MusicalSymbols => families.push("Noto Music"),
UnicodeBlock::Myanmar |
UnicodeBlock::MyanmarExtendedA |
UnicodeBlock::MyanmarExtendedB => families.push("Noto Sans Myanmar"),
UnicodeBlock::NKo => families.push("Noto Sans NKo"),
UnicodeBlock::Nabataean => families.push("Noto Sans Nabataean"),
UnicodeBlock::NewTaiLue => families.push("Noto Sans New Tai Lue"),
UnicodeBlock::Newa => families.push("Noto Sans Newa"),
UnicodeBlock::Ogham => families.push("Noto Sans Ogham"),
UnicodeBlock::OlChiki => families.push("Noto Sans Ol Chiki"),
UnicodeBlock::OldHungarian => families.push("Noto Sans Old Hungarian"),
UnicodeBlock::OldItalic => families.push("Noto Sans Old Italic"),
UnicodeBlock::OldNorthArabian => families.push("Noto Sans Old North Arabian"),
UnicodeBlock::OldPermic => families.push("Noto Sans Old Permic"),
UnicodeBlock::OldPersian => families.push("Noto Sans Old Persian"),
UnicodeBlock::OldSouthArabian => families.push("Noto Sans Old South Arabian"),
UnicodeBlock::OldTurkic => families.push("Noto Sans Old Turkic"),
UnicodeBlock::Oriya => families.push("Noto Sans Oriya"),
UnicodeBlock::Osage => families.push("Noto Sans Osage"),
UnicodeBlock::Osmanya => families.push("Noto Sans Osmanya"),
UnicodeBlock::PahawhHmong => families.push("Noto Sans Pahawh Hmong"),
UnicodeBlock::Palmyrene => families.push("Noto Sans Palmyrene"),
UnicodeBlock::PauCinHau => families.push("Noto Sans Pau Cin Hau"),
UnicodeBlock::Phagspa => families.push("Noto Sans PhagsPa"),
UnicodeBlock::Phoenician => families.push("Noto Sans Phoenician"),
UnicodeBlock::PsalterPahlavi => families.push("Noto Sans Psalter Pahlavi"),
UnicodeBlock::Rejang => families.push("Noto Sans Rejang"),
UnicodeBlock::Runic => families.push("Noto Sans Runic"),
UnicodeBlock::Samaritan => families.push("Noto Sans Samaritan"),
UnicodeBlock::Saurashtra => families.push("Noto Sans Saurashtra"),
UnicodeBlock::Sharada => families.push("Noto Sans Sharada"),
UnicodeBlock::Shavian => families.push("Noto Sans Shavian"),
UnicodeBlock::Siddham => families.push("Noto Sans Siddham"),
UnicodeBlock::Sinhala | UnicodeBlock::SinhalaArchaicNumbers => {
families.push("Noto Sans Sinhala")
},
UnicodeBlock::SoraSompeng => families.push("Noto Sans Sora Sompeng"),
UnicodeBlock::Sundanese => families.push("Noto Sans Sundanese"),
UnicodeBlock::SuttonSignWriting => families.push("Noto Sans SignWrit"),
UnicodeBlock::SylotiNagri => families.push("Noto Sans Syloti Nagri"),
UnicodeBlock::Syriac => families.push("Noto Sans Syriac"),
UnicodeBlock::Tagalog => families.push("Noto Sans Tagalog"),
UnicodeBlock::Tagbanwa => families.push("Noto Sans Tagbanwa"),
UnicodeBlock::TaiLe => families.push("Noto Sans Tai Le"),
UnicodeBlock::TaiTham => families.push("Noto Sans Tai Tham"),
UnicodeBlock::TaiViet => families.push("Noto Sans Tai Viet"),
UnicodeBlock::Takri => families.push("Noto Sans Takri"),
UnicodeBlock::Tamil => families.push("Noto Sans Tamil"),
UnicodeBlock::Tangut |
UnicodeBlock::TangutComponents |
UnicodeBlock::IdeographicSymbolsandPunctuation => families.push("Noto Serif Tangut"),
UnicodeBlock::Telugu => families.push("Noto Sans Telugu"),
UnicodeBlock::Thaana => {
families.push("Noto Sans Thaana");
},
UnicodeBlock::Thai => families.push("Noto Sans Thai"),
UnicodeBlock::Tibetan => families.push("Noto Serif Tibetan"),
UnicodeBlock::Tifinagh => families.push("Noto Sans Tifinagh"),
UnicodeBlock::Tirhuta => families.push("Noto Sans Tirhuta"),
UnicodeBlock::Ugaritic => families.push("Noto Sans Ugaritic"),
UnicodeBlock::UnifiedCanadianAboriginalSyllabics |
UnicodeBlock::UnifiedCanadianAboriginalSyllabicsExtended => {
families.push("Noto Sans Canadian Aboriginal")
},
UnicodeBlock::Vai => families.push("Noto Sans Vai"),
UnicodeBlock::WarangCiti => families.push("Noto Sans Warang Citi"),
UnicodeBlock::YiSyllables | UnicodeBlock::YiRadicals => {
families.push("Noto Sans Yi");
},
UnicodeBlock::Wancho => families.push("Noto Sans Wancho"),
_ => {},
}
}
families.push("Noto Sans Symbols");
families.push("Noto Sans Symbols2");
}
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