From 40a1901bada25279a438a83ab2add0db52247689 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Mon, 12 Oct 2026 13:19:29 +0100
Subject: [PATCH] Change --enable-sixel to --enable-images (the former stays as
 an alias).

---
 Makefile.am     |  4 ++--
 configure.ac    | 25 +++++++++++++++++--------
 format.c        |  2 +-
 input.c         |  8 ++++----
 screen-redraw.c |  2 +-
 screen-write.c  | 38 +++++++++++++++++++-------------------
 screen.c        | 18 +++++++++---------
 tmux.h          | 14 +++++++-------
 tty.c           |  8 ++++----
 9 files changed, 64 insertions(+), 55 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 349d6e224..5a561819e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -249,8 +249,8 @@ if HAVE_UTF8PROC
 nodist_tmux_SOURCES += compat/utf8proc.c
 endif
 
-# Enable sixel support.
-if ENABLE_SIXEL
+# Enable image support.
+if ENABLE_IMAGES
 dist_tmux_SOURCES += image.c image-sixel.c
 endif
 
diff --git a/configure.ac b/configure.ac
index 5da5f30af..703327bcf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -541,15 +541,24 @@ if test "x$enable_cgroups" = xyes; then
 	fi
 fi
 
-# Enable sixel support.
+# Enable image support.
+AC_ARG_ENABLE(
+	images,
+	AS_HELP_STRING(--enable-images, enable image support)
+)
 AC_ARG_ENABLE(
 	sixel,
-	AS_HELP_STRING(--enable-sixel, enable sixel images)
+	AS_HELP_STRING(--enable-sixel, alias for --enable-images),
+	[
+		if test "x$enable_images" = x; then
+			enable_images=$enable_sixel
+		fi
+	]
 )
-if test "x$enable_sixel" = xyes; then
-	AC_DEFINE(ENABLE_SIXEL)
+if test "x$enable_images" = xyes; then
+	AC_DEFINE(ENABLE_IMAGES)
 fi
-AM_CONDITIONAL(ENABLE_SIXEL, [test "x$enable_sixel" = xyes])
+AM_CONDITIONAL(ENABLE_IMAGES, [test "x$enable_images" = xyes])
 
 # Check for b64_ntop. If we have b64_ntop, we assume b64_pton as well.
 AC_MSG_CHECKING(for b64_ntop)
@@ -1148,10 +1157,10 @@ if test "x$enable_asan" = xyes; then
 else
 	AC_MSG_NOTICE([ASAN: off])
 fi
-if test "x$enable_sixel" = xyes; then
-	AC_MSG_NOTICE([SIXEL: on])
+if test "x$enable_images" = xyes; then
+	AC_MSG_NOTICE([images: on])
 else
-	AC_MSG_NOTICE([SIXEL: off])
+	AC_MSG_NOTICE([images: off])
 fi
 if test "x$enable_debug" = xyes; then
 	AC_MSG_NOTICE([debug: on])
diff --git a/format.c b/format.c
index 26a64f964..cb9e34061 100644
--- a/format.c
+++ b/format.c
@@ -3074,7 +3074,7 @@ format_cb_version(__unused struct format_tree *ft)
 static void *
 format_cb_sixel_support(__unused struct format_tree *ft)
 {
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	return (xstrdup("1"));
 #else
 	return (xstrdup("0"));
diff --git a/input.c b/input.c
index c38d12560..9bd03cf4e 100644
--- a/input.c
+++ b/input.c
@@ -1582,7 +1582,7 @@ input_csi_dispatch(struct input_ctx *ictx)
 		case -1:
 			break;
 		case 0:
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 			input_reply(ictx, 1, "\033[?1;2;4c");
 #else
 			input_reply(ictx, 1, "\033[?1;2c");
@@ -2100,7 +2100,7 @@ input_csi_dispatch_sm_private(struct input_ctx *ictx)
 static void
 input_csi_dispatch_sm_graphics(__unused struct input_ctx *ictx)
 {
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	int	n, m, o;
 
 	if (ictx->param_list_len > 3)
@@ -2625,7 +2625,7 @@ input_dcs_dispatch(struct input_ctx *ictx)
 	const char		 prefix[] = "tmux;";
 	const u_int		 prefixlen = (sizeof prefix) - 1;
 	long long		 allow_passthrough = 0;
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	struct window		*w;
 	struct sixel_image	*si;
 	int			 p2;
@@ -2641,7 +2641,7 @@ input_dcs_dispatch(struct input_ctx *ictx)
 		return (0);
 	}
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (wp != NULL && buf[0] == 'q' && ictx->interm_len == 0) {
 		w = wp->window;
 		if (input_split(ictx) != 0)
diff --git a/screen-redraw.c b/screen-redraw.c
index e4fb93281..9d9704f98 100644
--- a/screen-redraw.c
+++ b/screen-redraw.c
@@ -1921,7 +1921,7 @@ redraw_draw(struct client *c, struct window_pane *wp, int flags)
 
 	tty_reset(tty);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (wp != NULL)
 		tty_draw_images(c, wp);
 	else {
diff --git a/screen-write.c b/screen-write.c
index 754fba547..bc2cedd2c 100644
--- a/screen-write.c
+++ b/screen-write.c
@@ -1471,7 +1471,7 @@ screen_write_alignmenttest(struct screen_write_ctx *ctx)
 	memcpy(&gc, &grid_default_cell, sizeof gc);
 	utf8_set(&gc.data, 'E');
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_free_all(s) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1518,7 +1518,7 @@ screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 	if (s->cx > screen_size_x(s) - 1)
 		return;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1559,7 +1559,7 @@ screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 	if (s->cx > screen_size_x(s) - 1)
 		return;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1600,7 +1600,7 @@ screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 	if (s->cx > screen_size_x(s) - 1)
 		return;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1635,7 +1635,7 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 	if (ny == 0)
 		ny = 1;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1703,7 +1703,7 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 	if (ny == 0)
 		ny = 1;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1776,7 +1776,7 @@ screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
 	if (gl->cellsize == 0 && COLOUR_DEFAULT(bg))
 		return;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1815,7 +1815,7 @@ screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
 	if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg)))
 		return;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1842,7 +1842,7 @@ screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
 		return;
 	}
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1896,7 +1896,7 @@ screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
 		return;
 	}
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_free_all(s) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -1948,7 +1948,7 @@ screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
 	struct screen		*s = ctx->s;
 	struct grid		*gd = s->grid;
 	struct grid_line	*gl;
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	int			 redraw = 0;
 #endif
 	u_int			 rupper = s->rupper, rlower = s->rlower;
@@ -1971,7 +1971,7 @@ screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
 		return;
 	}
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (rlower == screen_size_y(s) - 1)
 		redraw = image_scroll_up(s, 1);
 	else
@@ -2003,7 +2003,7 @@ screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg)
 		ctx->bg = bg;
 	}
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_scroll_up(s, lines) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -2032,7 +2032,7 @@ screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
 	else if (lines > s->rlower - s->rupper + 1)
 		lines = s->rlower - s->rupper + 1;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_free_all(s) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -2073,7 +2073,7 @@ screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
 	struct visible_ranges	*r;
 	struct visible_range	*ri;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -2154,7 +2154,7 @@ screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
 	struct visible_ranges	*r;
 	struct visible_range	*ri;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_line(s, 0, s->cy - 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -2227,7 +2227,7 @@ screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
 	struct visible_ranges	*r;
 	struct visible_range	*ri;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_free_all(s) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -2735,7 +2735,7 @@ screen_write_collect_end(struct screen_write_ctx *ctx)
 		}
 	}
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	if (image_check_area(s, s->cx, s->cy, ci->used, 1) && ctx->wp != NULL)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
@@ -3239,7 +3239,7 @@ screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len,
 	tty_write(tty_cmd_rawstring, &ttyctx);
 }
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 /* Write a SIXEL image. */
 void
 screen_write_sixelimage(struct screen_write_ctx *ctx, struct sixel_image *si,
diff --git a/screen.c b/screen.c
index f9ca89af5..7120e1058 100644
--- a/screen.c
+++ b/screen.c
@@ -93,7 +93,7 @@ screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
 	s->tabs = NULL;
 	s->sel = NULL;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	TAILQ_INIT(&s->images);
 	TAILQ_INIT(&s->saved_images);
 #endif
@@ -132,7 +132,7 @@ screen_reinit(struct screen *s, int check)
 	screen_clear_selection(s);
 	screen_free_titles(s);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	image_free_all(s);
 #endif
 
@@ -154,7 +154,7 @@ screen_reset_hyperlinks(struct screen *s)
 void
 screen_free(struct screen *s)
 {
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	struct image	*im;
 #endif
 
@@ -174,7 +174,7 @@ screen_free(struct screen *s)
 		hyperlinks_free(s->hyperlinks);
 	screen_free_titles(s);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	/*
 	 * Images saved when entering the alternate screen stay linked in the
 	 * global list; move them back so they are freed and unlinked here, or
@@ -377,7 +377,7 @@ screen_resize_cursor(struct screen *s, u_int sx, u_int sy, int reflow,
 	if (sy != screen_size_y(s))
 		screen_resize_y(s, sy, eat_empty, &cy);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	image_free_all(s);
 #endif
 
@@ -692,7 +692,7 @@ int
 screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
 {
 	u_int		 sx, sy;
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	struct image	*im;
 #endif
 
@@ -709,7 +709,7 @@ screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
 	}
 	memcpy(&s->saved_cell, gc, sizeof s->saved_cell);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	TAILQ_CONCAT(&s->saved_images, &s->images, entry);
 	TAILQ_FOREACH(im, &s->saved_images, entry)
 	    im->list = &s->saved_images;
@@ -728,7 +728,7 @@ int
 screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
 {
 	u_int		 sx = screen_size_x(s), sy = screen_size_y(s);
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	struct image	*im;
 #endif
 
@@ -774,7 +774,7 @@ screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
 	grid_destroy(s->saved_grid);
 	s->saved_grid = NULL;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	image_free_all(s);
 	TAILQ_CONCAT(&s->images, &s->saved_images, entry);
 	TAILQ_FOREACH(im, &s->images, entry)
diff --git a/tmux.h b/tmux.h
index 5b6ef46cd..e7aa55eef 100644
--- a/tmux.h
+++ b/tmux.h
@@ -77,7 +77,7 @@ struct screen_write_cline;
 struct screen_write_ctx;
 struct session;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 struct sixel_image;
 #endif
 
@@ -1037,7 +1037,7 @@ struct style {
 	u_int			link;
 };
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 /* Image. */
 struct image {
 	struct screen		*s;
@@ -1113,7 +1113,7 @@ struct screen {
 	bitstr_t			*tabs;
 	struct screen_sel		*sel;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 	struct images			 images;
 	struct images			 saved_images;
 #endif
@@ -1904,7 +1904,7 @@ struct tty_ctx {
 			size_t		 size;
 		} sel;
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 		struct image		*image;
 #endif
 	};
@@ -3005,7 +3005,7 @@ void	tty_cmd_scrolldown(struct tty *, const struct tty_ctx *);
 void	tty_cmd_reverseindex(struct tty *, const struct tty_ctx *);
 void	tty_cmd_setselection(struct tty *, const struct tty_ctx *);
 void	tty_cmd_rawstring(struct tty *, const struct tty_ctx *);
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 void	tty_cmd_sixelimage(struct tty *, const struct tty_ctx *);
 void	tty_draw_images(struct client *, struct window_pane *);
 #endif
@@ -3649,7 +3649,7 @@ void	 screen_write_setselection(struct screen_write_ctx *, const char *,
 	     u_char *, u_int);
 void	 screen_write_rawstring(struct screen_write_ctx *, u_char *, u_int,
 	     int);
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 void	 screen_write_sixelimage(struct screen_write_ctx *,
 	     struct sixel_image *, u_int);
 #endif
@@ -4237,7 +4237,7 @@ void		 spawn_editor_finish(struct window_pane *);
 /* regsub.c */
 char		*regsub(const char *, const char *, const char *, int);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 /* image.c */
 int		 image_free_all(struct screen *);
 struct image	*image_store(struct screen *, struct sixel_image *);
diff --git a/tty.c b/tty.c
index 817d46ff8..494e5634f 100644
--- a/tty.c
+++ b/tty.c
@@ -68,7 +68,7 @@ static void	tty_emulate_repeat(struct tty *, enum tty_code_code,
 		    enum tty_code_code, u_int);
 static void	tty_draw_pane(struct tty *, const struct tty_ctx *, u_int);
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 static void	tty_write_one(void (*)(struct tty *, const struct tty_ctx *),
 		    struct client *, struct tty_ctx *);
 #endif
@@ -1460,7 +1460,7 @@ tty_check_codeset(struct tty *tty, const struct grid_cell *gc)
 	return (&new);
 }
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 /* Update context for client. */
 static int
 tty_set_client_cb(struct tty_ctx *ttyctx, struct client *c)
@@ -1588,7 +1588,7 @@ tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
 	}
 }
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 /* Only write to the incoming tty instead of every client. */
 static void
 tty_write_one(void (*cmdfn)(struct tty *, const struct tty_ctx *),
@@ -2034,7 +2034,7 @@ tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
 	tty_invalidate(tty);
 }
 
-#ifdef ENABLE_SIXEL
+#ifdef ENABLE_IMAGES
 void
 tty_cmd_sixelimage(struct tty *tty, const struct tty_ctx *ctx)
 {