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iris: drop bundled Noto Sans, match Compose's platform-font fonts

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Iris's call: "remove the font for now; just match what compose does."
Removes the six embedded Noto Sans/Noto Sans Mono TTFs (3.6 MB) that
TextData::default used to register ahead of the platform's own fonts;
fontique's system font discovery was already on by default and now
runs unshadowed (Roboto/Roboto Flex on Android, fontconfig on the
desktop). .so -3,748,136 bytes (11,193,608 -> 7,445,472), matching the
estimate. Verified fallback still lands on visible tofu for CJK/emoji
rather than blank, and flagged (not fixed) a fontique Android backend
gap that leaves Monospace unresolved -- see RUST.md's "Platform fonts
(2026-09-07)" and DECISIONS.md/IRIS.md's dated entries.
This commit is contained in:
iris committed 2026-09-07 16:14:34 -04:00
1 parent 690161e5e9
commit 896c93a59a
12 files changed
+193 -312
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iris/core/assets/fonts/NotoSans-Bold.ttf
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iris/core/assets/fonts/OFL.txt
-201
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@@ -1,201 +0,0 @@
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iris/core/src/primitive/text.rs
+15 -95
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@@ -2,34 +2,14 @@ use crate::{Align, GlyphAtlas, GlyphKey, PlacedGlyph, RegionAlign, Textures, UiC
use parley::{
Alignment, AlignmentOptions, FontContext, FontFamily, FontFamilyName, FontStyle, FontWeight,
GenericFamily, Layout, LayoutContext, LineHeight, PositionedLayoutItem, StyleProperty,
fontique::{Blob, FamilyId},
};
use std::ops::Range;
use std::sync::Arc;
use swash::{
FontRef,
scale::{Render, ScaleContext, Source, StrikeWith},
zeno::{Format, Vector},
};
/// Bundled fonts, registered over the system collection rather than relied
/// on alone -- see `TextData::register_bundled_fonts`'s doc comment for
/// why. Static weight/style cuts, not a variable font: parley/fontique
/// resolve a variable font's weight axis by picking normalized coordinates
/// on whatever single face registers for the family, and a phone whose
/// system "Roboto" is actually the variable "Roboto Flex" is exactly the
/// device class this sidesteps, rather than depends on working correctly.
/// Noto Sans, OFL-licensed (`assets/fonts/OFL.txt`), chosen for coverage
/// breadth (a transcript's content is not known in advance) over a
/// smaller-footprint alternative -- see the doc comment for the size this
/// added.
const NOTO_SANS_REGULAR: &[u8] = include_bytes!("../../assets/fonts/NotoSans-Regular.ttf");
const NOTO_SANS_BOLD: &[u8] = include_bytes!("../../assets/fonts/NotoSans-Bold.ttf");
const NOTO_SANS_ITALIC: &[u8] = include_bytes!("../../assets/fonts/NotoSans-Italic.ttf");
const NOTO_SANS_BOLD_ITALIC: &[u8] = include_bytes!("../../assets/fonts/NotoSans-BoldItalic.ttf");
const NOTO_SANS_MONO_REGULAR: &[u8] = include_bytes!("../../assets/fonts/NotoSansMono-Regular.ttf");
const NOTO_SANS_MONO_BOLD: &[u8] = include_bytes!("../../assets/fonts/NotoSansMono-Bold.ttf");
/// What starting up found about text rendering, for the on-screen
/// Diagnostics page and the one startup log line (RUST.md's P0 box, "log
/// once at startup ... the number of font families found, the default
@@ -80,91 +60,31 @@ pub struct TextData {
}
impl Default for TextData {
/// Text comes entirely from the platform's own font collection --
/// `FontContext::new()` builds a `fontique::Collection` with
/// `CollectionOptions::system_fonts` on by default, which is real
/// discovery on both targets this crate ships on: Android's backend
/// parses `/system/fonts` and `/system/etc/fonts.xml` and maps
/// `SansSerif`/`SystemUi` to `["Roboto Flex", "Roboto", "Noto Sans"]`
/// and `Monospace` to the platform's `"monospace"` alias; the desktop
/// build's backend is fontconfig. No font is bundled or registered
/// here -- see DECISIONS.md's 2026-09-07 entry for why (matching what
/// the Compose app does: it takes body/monospace text from
/// `FontFamily.Default`/`FontFamily.Monospace`, i.e. Android's Roboto
/// and its platform monospace face, and ships no text font of its own,
/// only its committed Nerd Fonts icon subset for fixed glyphs).
fn default() -> Self {
let mut data = Self {
Self {
font_cx: FontContext::new(),
layout_cx: LayoutContext::new(),
scale_cx: ScaleContext::new(),
atlas: GlyphAtlas::default(),
density: 1.0,
};
data.register_bundled_fonts();
data
}
}
}
impl TextData {
/// Registers Noto Sans (regular/bold/italic/bold-italic) and Noto Sans
/// Mono (regular/bold) as static faces, and puts them **first** in the
/// `SansSerif`/`Monospace` generic-family fallback lists -- ahead of,
/// not instead of, whatever the platform already found, so a script
/// Noto Sans lacks (CJK, emoji, ...) still falls through to the system
/// font the same as before this existed.
///
/// Exists because text rendering must not depend on the platform's own
/// font enumeration succeeding or resolving weight/style the way this
/// crate assumes: RUST.md's P0 box found bold spans on a real phone
/// rendering as blank gaps of the correct advance width (the glyph
/// simply wasn't rasterised -- `TextData::place`'s `None` arm), while
/// the emulator's system fonts happened to resolve every style. A
/// bundled, static-per-style family removes fontique's Android font
/// scan (`fontique::backend::android::SystemFonts::new`, which parses
/// `/system/fonts` and `/system/etc/fonts.xml`) from the path a glyph
/// has to survive to reach the screen at all.
///
/// Cost: six static `.ttf`s, ~3.6 MB uncompressed
/// (`iris/core/assets/fonts/`), landing in the APK compressed --
/// `build-apk.sh`'s own output is what says the delivered number, not
/// this comment.
fn register_bundled_fonts(&mut self) {
fn register(cx: &mut FontContext, bytes: &'static [u8]) -> Option<FamilyId> {
let blob = Blob::new(Arc::new(bytes));
cx.collection
.register_fonts(blob, None)
.into_iter()
.map(|(id, _)| id)
.next()
}
let sans_id = register(&mut self.font_cx, NOTO_SANS_REGULAR);
register(&mut self.font_cx, NOTO_SANS_BOLD);
register(&mut self.font_cx, NOTO_SANS_ITALIC);
register(&mut self.font_cx, NOTO_SANS_BOLD_ITALIC);
let mono_id = register(&mut self.font_cx, NOTO_SANS_MONO_REGULAR);
register(&mut self.font_cx, NOTO_SANS_MONO_BOLD);
if let Some(sans_id) = sans_id {
let existing: Vec<_> = self
.font_cx
.collection
.generic_families(GenericFamily::SansSerif)
.collect();
self.font_cx.collection.set_generic_families(
GenericFamily::SansSerif,
std::iter::once(sans_id).chain(existing),
);
let existing: Vec<_> = self
.font_cx
.collection
.generic_families(GenericFamily::SystemUi)
.collect();
self.font_cx.collection.set_generic_families(
GenericFamily::SystemUi,
std::iter::once(sans_id).chain(existing),
);
}
if let Some(mono_id) = mono_id {
let existing: Vec<_> = self
.font_cx
.collection
.generic_families(GenericFamily::Monospace)
.collect();
self.font_cx.collection.set_generic_families(
GenericFamily::Monospace,
std::iter::once(mono_id).chain(existing),
);
}
}
/// Builds the startup report -- see `FontDiagnostics`. Queries the
/// collection directly (`fontique::Query`) rather than shaping a real
/// string, since all that's needed is which family each axis lands on.