1 files changed, 3 insertions, 0 deletions
diff --git a/font/src/lib.rs b/font/src/lib.rs
index 2a19f620..d5b9716e 100644
--- a/font/src/lib.rs
+++ b/font/src/lib.rs
@@ -173,7 +173,10 @@ pub struct RasterizedGlyph {
 
 #[derive(Clone, Debug)]
 pub enum BitmapBuffer {
+    /// RGB alphamask.
     RGB(Vec<u8>),
+
+    /// RGBA pixels with premultiplied alpha.
     RGBA(Vec<u8>),
 }