[fallback] Add TODO note
diff --git a/src/hb-fallback-shape.cc b/src/hb-fallback-shape.cc
index 1a1fcfb..b894a4a 100644
--- a/src/hb-fallback-shape.cc
+++ b/src/hb-fallback-shape.cc
@@ -95,6 +95,16 @@
const hb_feature_t *features HB_UNUSED,
unsigned int num_features HB_UNUSED)
{
+ /* TODO
+ *
+ * - Apply fallback kern.
+ * - Handle Variation Selectors?
+ * - Apply normalization?
+ *
+ * This will make the fallback shaper into a dumb "TrueType"
+ * shaper which many people unfortunately still request.
+ */
+
hb_codepoint_t space;
font->get_glyph (' ', 0, &space);