textium: add some getters to the cache

textium/src/cache.rs

@@ -62,6 +62,16 @@ impl<'a, B> Cache<'a, B> where B: Buffer2d {
             None => Err(CacheError::NoSuchFont(name.into())),
         }
     }
+
+    pub fn get_font(&self, name: &str) -> Option<&Font> {
+        self.fonts.get(name)
+    }
+
+    pub fn get_face(&self, name: &str, scale: f32) -> Option<&CachedFaceData<B>> {
+        let key = FaceKey {name: String::from(name), scale: Scale(scale)};
+
+        self.faces.get(&key)
+    }
 }
 
 impl<B> CachedFaceData<B> where B: Buffer2d {