From d826a5920cc6dec5d942768f1c44e1a155de87c2 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Sat, 9 Jul 2022 21:57:25 -0400
Subject: [PATCH] docs: Clarify 0xFFFF as palette index

Mention that a palette index of 0xFFFF
means to use the foreground color.
---
 src/hb-ot-color.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hb-ot-color.h b/src/hb-ot-color.h
index c23ce4de4..d11e07e23 100644
--- a/src/hb-ot-color.h
+++ b/src/hb-ot-color.h
@@ -102,6 +102,10 @@ hb_ot_color_has_layers (hb_face_t *face);
  *
  * Pairs of glyph and color index.
  *
+ * A color index of 0xFFFF does not refer to a palette
+ * color, but indicates that the foreground color should
+ * be used.
+ *
  * Since: 2.1.0
  **/
 typedef struct hb_ot_color_layer_t {