Merge branch 'master' into improvement/update-wgpu_glyph

1 files changed, 43 insertions, 0 deletions

diff --git a/graphics/src/font/source.rs b/graphics/src/font/source.rs
new file mode 100644
index 00000000..917291ff
--- /dev/null
+++ b/graphics/src/font/source.rs
@@ -0,0 +1,43 @@
+use crate::font::{Family, LoadError};
+
+/// A font source that can find and load system fonts.
+#[allow(missing_debug_implementations)]
+pub struct Source {
+    raw: font_kit::source::SystemSource,
+}
+
+impl Source {
+    /// Creates a new [`Source`].
+    ///
+    /// [`Source`]: struct.Source.html
+    pub fn new() -> Self {
+        Source {
+            raw: font_kit::source::SystemSource::new(),
+        }
+    }
+
+    /// Finds and loads a font matching the set of provided family priorities.
+    ///
+    /// [`Source`]: struct.Source.html
+    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, .. } => {
+                use std::io::Read;
+
+                let mut buf = Vec::new();
+                let mut reader = std::fs::File::open(path).expect("Read font");
+                let _ = reader.read_to_end(&mut buf);
+
+                Ok(buf)
+            }
+            font_kit::handle::Handle::Memory { bytes, .. } => {
+                Ok(bytes.as_ref().clone())
+            }
+        }
+    }
+}