Switch to New Computer Modern Math

Cargo.lock

@@ -862,7 +862,7 @@ dependencies = [
 [[package]]
 name = "rex"
 version = "0.1.2"
-source = "git+https://github.com/laurmaedje/ReX#b44e59bfa68cc4b0288bd2be80e093ed3b279af5"
+source = "git+https://github.com/laurmaedje/ReX#7362b0cbb229211d6206198d80382a9b23eda993"
 dependencies = [
  "font",
  "unicode-math",

NOTICE

@@ -460,6 +460,8 @@ The GUST Font License Version 1.0 applies to:
 * Latin Modern fonts in fonts/LatinModern*.otf
   (http://www.gust.org.pl/projects/e-foundry/lm-math)
 
+* NewComputerModern fonts in fonts/NewCM*.otf
+
 % This is version 1.0, dated 22 June 2009, of the GUST Font License.
 % (GUST is the Polish TeX Users Group, http://www.gust.org.pl)
 %

src/library/math/mod.rs

@@ -20,7 +20,7 @@ pub struct MathNode {
 impl MathNode {
     /// The math font family.
     #[property(referenced)]
-    pub const FAMILY: FontFamily = FontFamily::new("Latin Modern Math");
+    pub const FAMILY: FontFamily = FontFamily::new("NewComputerModernMath");
     /// The spacing above display math.
     #[property(resolve, shorthand(around))]
     pub const ABOVE: Option<BlockSpacing> = Some(Ratio::one().into());

src/library/math/rex.rs

@@ -1,8 +1,8 @@
+use rex::error::{Error, LayoutError};
 use rex::font::{FontContext, MathFont};
 use rex::layout::{LayoutSettings, Style};
 use rex::parser::color::RGBA;
 use rex::render::{Backend, Cursor, Renderer};
-use rex::error::{Error, LayoutError};
 
 use crate::font::FaceId;
 use crate::library::prelude::*;
@@ -27,30 +27,33 @@ impl Layout for RexNode {
         styles: StyleChain,
     ) -> TypResult<Vec<Arc<Frame>>> {
         // Load the font.
-        let face_id = match ctx.fonts.select(self.family.as_str(), variant(styles)) {
-            Some(id) => id,
-            None => return Ok(vec![]),
-        };
+        let span = self.tex.span;
+        let face_id = ctx
+            .fonts
+            .select(self.family.as_str(), variant(styles))
+            .ok_or("failed to find math font")
+            .at(span)?;
 
         // Prepare the font.
         let data = ctx.fonts.get(face_id).buffer();
-        let font = match MathFont::parse(data) {
-            Ok(font) => font,
-            Err(_) => return Ok(vec![]),
-        };
+        let font = MathFont::parse(data)
+            .map_err(|_| "failed to parse math font")
+            .at(span)?;
+
+        let ctx = FontContext::new(&font).ok_or("failed to parse math font").at(span)?;
 
         // Layout the formula.
-        let ctx = FontContext::new(&font);
         let em = styles.get(TextNode::SIZE);
         let style = if self.display { Style::Display } else { Style::Text };
         let settings = LayoutSettings::new(&ctx, em.to_pt(), style);
         let renderer = Renderer::new();
-        let layout = renderer.layout(&self.tex.v, settings)
+        let layout = renderer
+            .layout(&self.tex.v, settings)
             .map_err(|err| match err {
                 Error::Parse(err) => err.to_string(),
                 Error::Layout(LayoutError::Font(err)) => err.to_string(),
             })
-            .at(self.tex.span)?;
+            .at(span)?;
 
         // Determine the metrics.
         let (x0, y0, x1, y1) = renderer.size(&layout);

tests/typ/graphics/transform.typ

@@ -23,7 +23,7 @@
   [X]
 }
 
-#set text("Latin Modern Math", size)
+#set text("Latin Modern Roman", size)
 Neither #tex, \
 nor #xetex!
 

tests/typ/math/basic.typ

@@ -11,6 +11,10 @@ $[ a^2 + b^2 = c^2 ]$
 Prove by induction:
 $[ \sum_{k=0}^n k = \frac{n(n+1)}{2} ]$
 
+---
+// Test that blackboard style looks nice.
+$[ f: \mathbb{N} \rightarrow \mathbb{R} ]$
+
 ---
 // Error: 1-10 expected '}' found EOF
 $\sqrt{x$

tests/typ/text/font.typ

@@ -24,9 +24,6 @@
 // Emoji.
 Emoji: 🐪, 🌋, 🏞
 
-// Math.
-#text("Latin Modern Math")[∫ 𝛼 + 3𝛽 d𝑡]
-
 // Colors.
 [
   #set text(fill: eastern)
@@ -34,7 +31,7 @@ Emoji: 🐪, 🌋, 🏞
 ]
 
 // Disable font fallback beyond the user-specified list.
-// Without disabling, Latin Modern Math would come to the rescue.
+// Without disabling, NewComputerModernMath would come to the rescue.
 #set text("PT Sans", "Twitter Color Emoji", fallback: false)
 2π = 𝛼 + 𝛽. ✅