From 126dea8828ae33dd66b514a76b9960a5305eedc3 Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Wed, 14 Oct 2026 08:33:19 +0000
Subject: [PATCH] Redraw when pixel sizes change.

---
 tmux.h     |  4 ++--
 tty-keys.c |  8 +++++---
 tty.c      | 10 ++++++++--
 3 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/tmux.h b/tmux.h
index aff0779ee..a52999a9e 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1459 2026/10/13 10:21:58 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1460 2026/10/14 08:33:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2922,7 +2922,7 @@ void	tty_cell(struct tty *, const struct grid_cell *,
 	    const struct tty_style_ctx *);
 int	tty_init(struct tty *, struct client *);
 void	tty_resize(struct tty *);
-void	tty_set_size(struct tty *, u_int, u_int, u_int, u_int);
+int	tty_set_size(struct tty *, u_int, u_int, u_int, u_int);
 void	tty_invalidate(struct tty *);
 void	tty_start_tty(struct tty *);
 void	tty_send_requests(struct tty *);
diff --git a/tty-keys.c b/tty-keys.c
index b9ca2f019..f82d901ff 100644
--- a/tty-keys.c
+++ b/tty-keys.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-keys.c,v 1.217 2026/10/12 12:26:46 nicm Exp $ */
+/* $OpenBSD: tty-keys.c,v 1.218 2026/10/14 08:33:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1914,7 +1914,8 @@ tty_keys_winsz(struct tty *tty, const char *buf, size_t len, size_t *size,
 			return (0);
 
 		/* Window size in characters. */
-		tty_set_size(tty, sx, sy, tty->xpixel, tty->ypixel);
+		if (tty_set_size(tty, sx, sy, tty->xpixel, tty->ypixel))
+			server_redraw_client(c);
 		return (0);
 	} else if (sscanf(tmp, "4;%u;%u", &ypixel, &xpixel) == 2) {
 		*size = end + 1;
@@ -1924,7 +1925,8 @@ tty_keys_winsz(struct tty *tty, const char *buf, size_t len, size_t *size,
 		/* Window size in pixels. */
 		char_x = (xpixel && tty->sx) ? xpixel / tty->sx : 0;
 		char_y = (ypixel && tty->sy) ? ypixel / tty->sy : 0;
-		tty_set_size(tty, tty->sx, tty->sy, char_x, char_y);
+		if (tty_set_size(tty, tty->sx, tty->sy, char_x, char_y))
+			server_redraw_client(c);
 		tty_invalidate(tty);
 
 		tty->flags &= ~TTY_WINSIZEQUERY;
diff --git a/tty.c b/tty.c
index ad2853d42..b8531c7e6 100644
--- a/tty.c
+++ b/tty.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tty.c,v 1.486 2026/10/12 10:39:05 nicm Exp $ */
+/* $OpenBSD: tty.c,v 1.487 2026/10/14 08:33:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -155,13 +155,19 @@ tty_resize(struct tty *tty)
 	tty_invalidate(tty);
 }
 
-void
+int
 tty_set_size(struct tty *tty, u_int sx, u_int sy, u_int xpixel, u_int ypixel)
 {
+ 	if (tty->sx == sx &&
+            tty->sy == sy &&
+            tty->xpixel == xpixel &&
+            tty->ypixel == ypixel)
+                return (0);
 	tty->sx = sx;
 	tty->sy = sy;
 	tty->xpixel = xpixel;
 	tty->ypixel = ypixel;
+	return (1);
 }
 
 static void