Migrate default fonts to a new crate

This allows license checking tools to omit the OFL and UFL licenses when
`default_fonts` are turned off.

Fixes #2321

ARCHITECTURE.md

@@ -5,7 +5,7 @@ Also see [`CONTRIBUTING.md`](CONTRIBUTING.md) for what to do before opening a PR
 
 
 ## Crate overview
-The crates in this repository are: `egui, emath, epaint, egui_extras, egui-winit, egui_glow, egui_demo_lib, egui_demo_app`.
+The crates in this repository are: `egui, emath, epaint, epaint_default_fonts, egui_extras, egui-winit, egui_glow, egui_demo_lib, egui_demo_app`.
 
 ### `egui`: The main GUI library.
 Example code: `if ui.button("Click me").clicked() { … }`
@@ -19,7 +19,12 @@ Examples: `Vec2, Pos2, Rect, lerp, remap`
 
 Example: `Shape::Circle { center, radius, fill, stroke }`
 
-Depends on `emath`.
+Depends on `emath`. Also depends on `epaint_default_fonts` when the `default_fonts` feature is enabled.
+
+### `epaint_default_fonts`
+Embedded fonts (using `include_bytes!()`) for use by `epaint` in selecting defaults.
+
+Since the font files themselves are licensed differently from the `epaint` source code, this simplifies licenses for callers who disable the default fonts.
 
 ### `egui_extras`
 This adds additional features on top of `egui`.

Cargo.lock

@@ -1460,6 +1460,7 @@ dependencies = [
  "document-features",
  "ecolor",
  "emath",
+ "epaint_default_fonts",
  "log",
  "nohash-hasher",
  "parking_lot",
@@ -1468,6 +1469,10 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "epaint_default_fonts"
+version = "0.28.1"
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"

Cargo.toml

@@ -11,6 +11,7 @@ members = [
     "crates/egui",
     "crates/emath",
     "crates/epaint",
+    "crates/epaint_default_fonts",
 
     "examples/*",
     "tests/*",
@@ -56,6 +57,7 @@ opt-level = 2
 emath = { version = "0.28.1", path = "crates/emath", default-features = false }
 ecolor = { version = "0.28.1", path = "crates/ecolor", default-features = false }
 epaint = { version = "0.28.1", path = "crates/epaint", default-features = false }
+epaint_default_fonts = { version = "0.28.1", path = "crates/epaint_default_fonts" }
 egui = { version = "0.28.1", path = "crates/egui", default-features = false }
 egui-winit = { version = "0.28.1", path = "crates/egui-winit", default-features = false }
 egui_extras = { version = "0.28.1", path = "crates/egui_extras", default-features = false }

RELEASES.md

@@ -73,16 +73,17 @@ I usually do this all on the `master` branch, but doing it in a release branch i
 
 ###  `cargo publish`:
 ```
-(cd crates/emath         && cargo publish --quiet)  &&  echo "✅ emath"
-(cd crates/ecolor        && cargo publish --quiet)  &&  echo "✅ ecolor"
-(cd crates/epaint        && cargo publish --quiet)  &&  echo "✅ epaint"
-(cd crates/egui          && cargo publish --quiet)  &&  echo "✅ egui"
-(cd crates/egui-winit    && cargo publish --quiet)  &&  echo "✅ egui-winit"
-(cd crates/egui_extras   && cargo publish --quiet)  &&  echo "✅ egui_extras"
-(cd crates/egui-wgpu     && cargo publish --quiet)  &&  echo "✅ egui-wgpu"
-(cd crates/egui_demo_lib && cargo publish --quiet)  &&  echo "✅ egui_demo_lib"
-(cd crates/egui_glow     && cargo publish --quiet)  &&  echo "✅ egui_glow"
-(cd crates/eframe        && cargo publish --quiet)  &&  echo "✅ eframe"
+(cd crates/emath                && cargo publish --quiet)  &&  echo "✅ emath"
+(cd crates/ecolor               && cargo publish --quiet)  &&  echo "✅ ecolor"
+(cd crates/epaint               && cargo publish --quiet)  &&  echo "✅ epaint"
+(cd crates/epaint_default_fonts && cargo publish --quiet)  &&  echo "✅ epaint_default_fonts"
+(cd crates/egui                 && cargo publish --quiet)  &&  echo "✅ egui"
+(cd crates/egui-winit           && cargo publish --quiet)  &&  echo "✅ egui-winit"
+(cd crates/egui_extras          && cargo publish --quiet)  &&  echo "✅ egui_extras"
+(cd crates/egui-wgpu            && cargo publish --quiet)  &&  echo "✅ egui-wgpu"
+(cd crates/egui_demo_lib        && cargo publish --quiet)  &&  echo "✅ egui_demo_lib"
+(cd crates/egui_glow            && cargo publish --quiet)  &&  echo "✅ egui_glow"
+(cd crates/eframe               && cargo publish --quiet)  &&  echo "✅ eframe"
 ```
 
 ## Announcements

crates/epaint/Cargo.toml

@@ -6,7 +6,7 @@ description = "Minimal 2D graphics library for GUI work"
 edition.workspace = true
 rust-version.workspace = true
 homepage = "https://github.com/emilk/egui/tree/master/crates/epaint"
-license = "(MIT OR Apache-2.0) AND OFL-1.1 AND LicenseRef-UFL-1.0" # OFL and UFL used by default_fonts. See https://github.com/emilk/egui/issues/2321
+license = "MIT OR Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/emilk/egui/tree/master/crates/epaint"
 categories = ["graphics", "gui"]
@@ -15,11 +15,7 @@ include = [
   "../LICENSE-APACHE",
   "../LICENSE-MIT",
   "**/*.rs",
-  "Cargo.toml",
-  "fonts/*.ttf",
-  "fonts/*.txt",
-  "fonts/OFL.txt",
-  "fonts/UFL.txt",
+  "Cargo.toml"
 ]
 
 [lints]
@@ -50,7 +46,7 @@ deadlock_detection = ["dep:backtrace"]
 
 ## If set, epaint will use `include_bytes!` to bundle some fonts.
 ## If you plan on specifying your own fonts you may disable this feature.
-default_fonts = []
+default_fonts = ["epaint_default_fonts"]
 
 ## Turn on the `log` feature, that makes egui log some errors using the [`log`](https://docs.rs/log) crate.
 log = ["dep:log"]
@@ -100,6 +96,8 @@ serde = { workspace = true, optional = true, features = ["derive", "rc"] }
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 backtrace = { workspace = true, optional = true }
 
+epaint_default_fonts = { workspace = true, optional = true }
+
 
 [dev-dependencies]
 criterion.workspace = true

crates/epaint/src/text/fonts.rs

@@ -10,6 +10,9 @@ use crate::{
 };
 use emath::{NumExt as _, OrderedFloat};
 
+#[cfg(feature = "default_fonts")]
+use epaint_default_fonts::{EMOJI_ICON, HACK_REGULAR, NOTO_EMOJI_REGULAR, UBUNTU_LIGHT};
+
 // ----------------------------------------------------------------------------
 
 /// How to select a sized font.
@@ -263,39 +266,32 @@ impl Default for FontDefinitions {
 
         let mut families = BTreeMap::new();
 
-        font_data.insert(
-            "Hack".to_owned(),
-            FontData::from_static(include_bytes!("../../fonts/Hack-Regular.ttf")),
-        );
+        font_data.insert("Hack".to_owned(), FontData::from_static(HACK_REGULAR));
         font_data.insert(
             "Ubuntu-Light".to_owned(),
-            FontData::from_static(include_bytes!("../../fonts/Ubuntu-Light.ttf")),
+            FontData::from_static(UBUNTU_LIGHT),
         );
 
         // Some good looking emojis. Use as first priority:
         font_data.insert(
             "NotoEmoji-Regular".to_owned(),
-            FontData::from_static(include_bytes!("../../fonts/NotoEmoji-Regular.ttf")).tweak(
-                FontTweak {
-                    scale: 0.81, // make it smaller
-                    ..Default::default()
-                },
-            ),
+            FontData::from_static(NOTO_EMOJI_REGULAR).tweak(FontTweak {
+                scale: 0.81, // make it smaller
+                ..Default::default()
+            }),
         );
 
         // Bigger emojis, and more. <http://jslegers.github.io/emoji-icon-font/>:
         font_data.insert(
             "emoji-icon-font".to_owned(),
-            FontData::from_static(include_bytes!("../../fonts/emoji-icon-font.ttf")).tweak(
-                FontTweak {
-                    scale: 0.88, // make it smaller
-
-                    // probably not correct, but this does make texts look better (#2724 for details)
-                    y_offset_factor: 0.11, // move glyphs down to better align with common fonts
-                    baseline_offset_factor: -0.11, // ...now the entire row is a bit down so shift it back
-                    ..Default::default()
-                },
-            ),
+            FontData::from_static(EMOJI_ICON).tweak(FontTweak {
+                scale: 0.88, // make it smaller
+
+                // probably not correct, but this does make texts look better (#2724 for details)
+                y_offset_factor: 0.11, // move glyphs down to better align with common fonts
+                baseline_offset_factor: -0.11, // ...now the entire row is a bit down so shift it back
+                ..Default::default()
+            }),
         );
 
         families.insert(

crates/epaint_default_fonts/CHANGELOG.md

@@ -0,0 +1,9 @@
+# `epaint_default_fonts` changelog
+All notable changes to the `epaint_default_fonts` crate will be documented in this file.
+
+This file is updated upon each release.
+Changes since the last release can be found at <https://github.com/emilk/egui/compare/latest...HEAD> or by running the `scripts/generate_changelog.py` script.
+
+
+## 0.28.1 - 2024-07-05
+Crate added.

crates/epaint_default_fonts/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "epaint_default_fonts"
+version.workspace = true
+authors = ["Emil Ernerfeldt <emil.ernerfeldt@gmail.com>"]
+description = "Default fonts for use in epaint / egui"
+edition.workspace = true
+rust-version.workspace = true
+homepage = "https://github.com/emilk/egui/tree/master/crates/epaint_default_fonts"
+license = "(MIT OR Apache-2.0) AND OFL-1.1 AND LicenseRef-UFL-1.0" # OFL and UFL are from the font files themselves.
+readme = "README.md"
+repository = "https://github.com/emilk/egui/tree/master/crates/epaint_default_fonts"
+categories = ["graphics", "gui"]
+keywords = ["graphics", "gui", "egui"]
+include = [
+  "../LICENSE-APACHE",
+  "../LICENSE-MIT",
+  "**/*.rs",
+  "Cargo.toml",
+  "fonts/*.ttf",
+  "fonts/*.txt",
+  "fonts/OFL.txt",
+  "fonts/UFL.txt",
+]
+
+[lints]
+workspace = true
+
+[package.metadata.docs.rs]
+all-features = true

crates/epaint_default_fonts/README.md

@@ -0,0 +1,11 @@
+# `epaint_default_fonts` -  fonts for epaint and egui
+
+[![Latest version](https://img.shields.io/crates/v/epaint_default_fonts.svg)](https://crates.io/crates/epaint_default_fonts)
+[![Documentation](https://docs.rs/epaint_default_fonts/badge.svg)](https://docs.rs/epaint_default_fonts)
+[![unsafe forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
+![MIT](https://img.shields.io/badge/license-MIT-blue.svg)
+![Apache](https://img.shields.io/badge/license-Apache-blue.svg)
+
+Default fonts that are used in `epaint` and `egui`. Not intended for use as a standalone library.
+
+Made for [`egui`](https://github.com/emilk/egui/).