Improve default font loading

2 files changed, 19 insertions, 18 deletions

diff --git a/wgpu/src/font.rs b/wgpu/src/font.rs
index 9bba9b22..31df5bf4 100644
--- a/wgpu/src/font.rs
+++ b/wgpu/src/font.rs
@@ -1,3 +1,4 @@
+pub use font_kit::error::SelectionError as LoadError;
 pub use font_kit::family_name::FamilyName as Family;
 
 pub struct Source {
@@ -11,14 +12,11 @@ impl Source {
         }
     }
 
-    pub fn load(&self, families: &[Family]) -> Vec<u8> {
-        let font = self
-            .raw
-            .select_best_match(
-                families,
-                &font_kit::properties::Properties::default(),
-            )
-            .expect("Find font");
+    pub fn load(&self, families: &[Family]) -> Result<Vec<u8>, LoadError> {
+        let font = self.raw.select_best_match(
+            families,
+            &font_kit::properties::Properties::default(),
+        )?;
 
         match font {
             font_kit::handle::Handle::Path { path, .. } => {
@@ -28,10 +26,10 @@ impl Source {
                 let mut reader = std::fs::File::open(path).expect("Read font");
                 let _ = reader.read_to_end(&mut buf);
 
-                buf
+                Ok(buf)
             }
             font_kit::handle::Handle::Memory { bytes, .. } => {
-                bytes.as_ref().clone()
+                Ok(bytes.as_ref().clone())
             }
         }
     }
diff --git a/wgpu/src/renderer.rs b/wgpu/src/renderer.rs
index c167f2bf..060f07a3 100644
--- a/wgpu/src/renderer.rs
+++ b/wgpu/src/renderer.rs
@@ -64,14 +64,17 @@ impl Renderer {
 
         // TODO: Font customization
         let font_source = font::Source::new();
-        let sans_serif_font = font_source.load(&[font::Family::SansSerif]);
-        let mono_font = font_source.load(&[font::Family::Monospace]);
-
-        let glyph_brush = GlyphBrushBuilder::using_fonts_bytes(vec![
-            sans_serif_font,
-            mono_font,
-        ])
-        .build(&mut device, TextureFormat::Bgra8UnormSrgb);
+        let default_font = font_source
+            .load(&[font::Family::SansSerif, font::Family::Serif])
+            .expect("Find sans-serif or serif font");
+
+        let mono_font = font_source
+            .load(&[font::Family::Monospace])
+            .expect("Find monospace font");
+
+        let glyph_brush =
+            GlyphBrushBuilder::using_fonts_bytes(vec![default_font, mono_font])
+                .build(&mut device, TextureFormat::Bgra8UnormSrgb);
 
         let quad_pipeline = quad::Pipeline::new(&mut device);
         let image_pipeline = crate::image::Pipeline::new(&mut device);