From 718e281820c69be5629c490eba42595e2f65554d Mon Sep 17 00:00:00 2001
From: Michael Grant <mgrant@grant.org>
Date: Wed, 5 Aug 2026 21:45:45 +0100
Subject: [PATCH] Fix SIXEL median-cut palette generation

---
 image-sixel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/image-sixel.c b/image-sixel.c
index 2033f43b0..8a7504c24 100644
--- a/image-sixel.c
+++ b/image-sixel.c
@@ -859,6 +859,9 @@ sixel_box_split(struct sixel_box *box, struct sixel_box *new,
 		if (count >= box->count / 2)
 			break;
 	}
+	/* Keep the maximum occupied level in the new box. */
+	if (level == last)
+		level--;
 	memcpy(new, box, sizeof *new);
 	if (channel == 0) {
 		box->red_max = level;