Fix bold/non-bold mismatch in 256 colour mode by adding an extra 8 bits (ick) onto the attributes and using two of them to mark the fg and bg as 256 colours when necessary. If only it was 255 colours we would have one value for default and wouln't need this :-/.

2025-11-04 01:34:18 +00:00 · 2008-09-08 22:03:56 +00:00
parent cecd7c0cc8
commit 6674197e85
8 changed files with 136 additions and 95 deletions
--- a/input.c
+++ b/input.c
@@ -1,4 +1,4 @@
-/* $Id: input.c,v 1.55 2008-09-08 21:05:41 nicm Exp $ */
+/* $Id: input.c,v 1.56 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -493,7 +493,7 @@ void
 input_handle_c0_control(u_char ch, struct input_ctx *ictx)
 {
 	struct screen	*s = ictx->ctx.s;
-	u_char		 attr;
+	u_short		 attr;

 	log_debug2("-- c0 %zu: %hhu", ictx->off, ch);

@@ -1053,7 +1053,8 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 	struct screen  *s = ictx->ctx.s;
 	u_int		i, n;
 	uint16_t	m, o;
-	u_char		attr, fg, bg;
+	u_short		attr;
+	u_char		fg, bg;

 	attr = s->attr;
 	fg = s->fg;
@@ -1075,19 +1076,11 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 			if (input_get_argument(ictx, 2, &m, 0) != 0)
 				return;
 			if (o == 38) {
-				if (m > 7 && m < 16) {
-					/* XXX this is not right; colours 8-15 are not the same as bold */
-					attr |= ATTR_BRIGHT;
-					m -= 8;
-				}
+				attr |= ATTR_FG256;
 				fg = m;
 				break;
 			} else if (o == 48) {
-				if (m > 7 && m < 16) {
-					/* XXX this is not right; colours 8-15 are not the same as bold */
-					attr |= ATTR_BRIGHT;
-					m -= 8;
-				}
+				attr |= ATTR_BG256;
 				bg = m;
 				break;
 			}
@@ -1139,9 +1132,11 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 			case 35:
 			case 36:
 			case 37:
+				attr &= ~ATTR_FG256;
 				fg = m - 30;
 				break;
 			case 39:
+				attr &= ~ATTR_FG256;
 				fg = 8;
 				break;
 			case 40:
@@ -1151,10 +1146,12 @@ input_handle_sequence_sgr(struct input_ctx *ictx)
 			case 44:
 			case 45:
 			case 46:
-			case 47:
+			case 47:	
+				attr &= ~ATTR_BG256;
 				bg = m - 40;
 				break;
 			case 49:
+				attr &= ~ATTR_BG256;
 				bg = 8;
 				break;
 			}
--- a/screen-display.c
+++ b/screen-display.c
@@ -1,4 +1,4 @@
-/* $Id: screen-display.c,v 1.19 2008-09-08 17:40:50 nicm Exp $ */
+/* $Id: screen-display.c,v 1.20 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -25,7 +25,7 @@
 /* Set a cell. */
 void
 screen_display_set_cell(struct screen *s,
-    u_int px, u_int py, u_char data, u_char attr, u_char fg, u_char bg)
+    u_int px, u_int py, u_char data, u_short attr, u_char fg, u_char bg)
 {
 	screen_set_cell(
 	    s, screen_x(s, px), screen_y(s, py), data, attr, fg, bg);
@@ -75,7 +75,7 @@ screen_display_move_lines(struct screen *s, u_int dy, u_int py, u_int ny)
 /* Fill a set of cells. */
 void
 screen_display_fill_area(struct screen *s, u_int px, u_int py,
-    u_int nx, u_int ny, u_char data, u_char attr, u_char fg, u_char bg)
+    u_int nx, u_int ny, u_char data, u_short attr, u_char fg, u_char bg)
 {
 	if (nx == 0 || ny == 0) {
 		SCREEN_DEBUG4(s, px, py, nx, ny);
@@ -378,10 +378,14 @@ screen_display_insert_characters(struct screen *s, u_int px, u_int py, u_int nx)

 	if (px + nx != screen_last_x(s)) {
 		mx = screen_last_x(s) - (px + nx);
-		memmove(&s->grid_data[py][px + nx], &s->grid_data[py][px], mx);
-		memmove(&s->grid_attr[py][px + nx], &s->grid_attr[py][px], mx);
-		memmove(&s->grid_fg[py][px + nx], &s->grid_fg[py][px], mx);
-		memmove(&s->grid_bg[py][px + nx], &s->grid_bg[py][px], mx);
+		memmove(&s->grid_data[py][px + nx],
+		    &s->grid_data[py][px], mx * sizeof **s->grid_data);
+		memmove(&s->grid_attr[py][px + nx],
+		    &s->grid_attr[py][px], mx * sizeof **s->grid_attr);
+		memmove(&s->grid_fg[py][px + nx],
+		    &s->grid_fg[py][px], mx * sizeof **s->grid_fg);
+		memmove(&s->grid_bg[py][px + nx],
+		    &s->grid_bg[py][px], mx * sizeof **s->grid_bg);
 	}

 	memset(&s->grid_data[py][px], ' ', nx);
@@ -437,7 +441,8 @@ screen_display_copy_area(struct screen *dst, struct screen *src,
    u_int px, u_int py, u_int nx, u_int ny, u_int ox, u_int oy)
 {
 	u_int	i, j;
-	u_char	data, attr, fg, bg;
+	u_short	attr;
+	u_char	data, fg, bg;

 	if (nx == 0 || ny == 0) {
 		SCREEN_DEBUG4(dst, px, py, nx, ny);
--- a/screen-redraw.c
+++ b/screen-redraw.c
@@ -1,4 +1,4 @@
-/* $Id: screen-redraw.c,v 1.10 2008-09-08 17:40:51 nicm Exp $ */
+/* $Id: screen-redraw.c,v 1.11 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -23,7 +23,7 @@
 #include "tmux.h"

 void	screen_redraw_get_cell(struct screen_redraw_ctx *,
-	    u_int, u_int, u_char *, u_char *, u_char *, u_char *);
+	    u_int, u_int, u_char *, u_short *, u_char *, u_char *);

 /* Initialise redrawing with a window. */
 void
@@ -99,7 +99,7 @@ screen_redraw_stop(struct screen_redraw_ctx *ctx)
 /* Get cell data. */
 void
 screen_redraw_get_cell(struct screen_redraw_ctx *ctx,
-    u_int px, u_int py, u_char *data, u_char *attr, u_char *fg, u_char *bg)
+    u_int px, u_int py, u_char *data, u_short *attr, u_char *fg, u_char *bg)
 {
 	struct screen	*s = ctx->s;

@@ -121,7 +121,7 @@ screen_redraw_move_cursor(struct screen_redraw_ctx *ctx, u_int px, u_int py)
 /* Set attributes. */
 void
 screen_redraw_set_attributes(
-    struct screen_redraw_ctx *ctx, u_char attr, u_char fg, u_char bg)
+    struct screen_redraw_ctx *ctx, u_short attr, u_char fg, u_char bg)
 {
 	ctx->write(ctx->data, TTY_ATTRIBUTES, attr, fg, bg);
 }
@@ -151,7 +151,8 @@ screen_redraw_write_string(struct screen_redraw_ctx *ctx, const char *fmt, ...)
 void
 screen_redraw_cell(struct screen_redraw_ctx *ctx, u_int px, u_int py)
 {
-	u_char	 data, attr, fg, bg;
+	u_short	 attr;
+	u_char	 data, fg, bg;

 	screen_redraw_move_cursor(ctx, px, py);
 	screen_redraw_get_cell(ctx, px, py, &data, &attr, &fg, &bg);
--- a/screen-write.c
+++ b/screen-write.c
@@ -1,4 +1,4 @@
-/* $Id: screen-write.c,v 1.11 2008-09-08 17:40:51 nicm Exp $ */
+/* $Id: screen-write.c,v 1.12 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -172,7 +172,7 @@ screen_write_put_string(struct screen_write_ctx *ctx, const char *fmt, ...)
 /* Set screen attributes. */
 void
 screen_write_set_attributes(
-    struct screen_write_ctx *ctx, u_char attr, u_char fg, u_char bg)
+    struct screen_write_ctx *ctx, u_short attr, u_char fg, u_char bg)
 {
 	struct screen	*s = ctx->s;

--- a/screen.c
+++ b/screen.c
@@ -1,4 +1,4 @@
-/* $Id: screen.c,v 1.67 2008-09-08 17:40:51 nicm Exp $ */
+/* $Id: screen.c,v 1.68 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -279,14 +279,18 @@ screen_expand_line(struct screen *s, u_int py, u_int nx)
 	ox = s->grid_size[py];
 	s->grid_size[py] = nx;

-	s->grid_data[py] = xrealloc(s->grid_data[py], 1, nx);
-	memset(&s->grid_data[py][ox], ' ', nx - ox);
-	s->grid_attr[py] = xrealloc(s->grid_attr[py], 1, nx);
-	memset(&s->grid_attr[py][ox], 0, nx - ox);
-	s->grid_fg[py] = xrealloc(s->grid_fg[py], 1, nx);
-	memset(&s->grid_fg[py][ox], 8, nx - ox);
-	s->grid_bg[py] = xrealloc(s->grid_bg[py], 1, nx);
-	memset(&s->grid_bg[py][ox], 8, nx - ox);
+	s->grid_data[py] = xrealloc(
+	    s->grid_data[py], sizeof **s->grid_data, nx);
+	memset(&s->grid_data[py][ox], ' ', (nx - ox) * sizeof **s->grid_data);
+	s->grid_attr[py] = xrealloc(
+	    s->grid_attr[py], sizeof **s->grid_attr, nx);
+	memset(&s->grid_attr[py][ox], 0, (nx - ox) * sizeof **s->grid_attr);
+	s->grid_fg[py] = xrealloc(
+	    s->grid_fg[py], sizeof **s->grid_fg, nx);
+	memset(&s->grid_fg[py][ox], 8, (nx - ox) * sizeof **s->grid_fg);
+	s->grid_bg[py] = xrealloc(
+	    s->grid_bg[py], sizeof **s->grid_bg, nx);
+	memset(&s->grid_bg[py][ox], 8, (nx - ox) * sizeof **s->grid_bg);
 }

 /* Reduce line. */
@@ -295,16 +299,20 @@ screen_reduce_line(struct screen *s, u_int py, u_int nx)
 {
 	s->grid_size[py] = nx;

-	s->grid_data[py] = xrealloc(s->grid_data[py], 1, nx);
-	s->grid_attr[py] = xrealloc(s->grid_attr[py], 1, nx);
-	s->grid_fg[py] = xrealloc(s->grid_fg[py], 1, nx);
-	s->grid_bg[py] = xrealloc(s->grid_bg[py], 1, nx);
+	s->grid_data[py] = xrealloc(
+	    s->grid_data[py], sizeof **s->grid_data, nx);
+	s->grid_attr[py] = xrealloc(
+	    s->grid_attr[py], sizeof **s->grid_attr, nx);
+	s->grid_fg[py] = xrealloc(
+	    s->grid_fg[py], sizeof **s->grid_fg, nx);
+	s->grid_bg[py] = xrealloc(
+	    s->grid_bg[py], sizeof **s->grid_bg, nx);
 }

 /* Get cell. */
 void
 screen_get_cell(struct screen *s,
-    u_int cx, u_int cy, u_char *data, u_char *attr, u_char *fg, u_char *bg)
+    u_int cx, u_int cy, u_char *data, u_short *attr, u_char *fg, u_char *bg)
 {
 	if (cx >= s->grid_size[cy]) {
 		*data = ' ';
@@ -325,7 +333,7 @@ screen_get_cell(struct screen *s,
 /* Set a cell. */
 void
 screen_set_cell(struct screen *s,
-    u_int cx, u_int cy, u_char data, u_char attr, u_char fg, u_char bg)
+    u_int cx, u_int cy, u_char data, u_short attr, u_char fg, u_char bg)
 {
 	if (cx >= s->grid_size[cy])
 		screen_expand_line(s, cy, cx + 1);
@@ -406,7 +414,7 @@ screen_move_lines(struct screen *s, u_int dy, u_int py, u_int ny)
 /* Fill an area. */
 void
 screen_fill_area(struct screen *s, u_int px, u_int py,
-    u_int nx, u_int ny, u_char data, u_char attr, u_char fg, u_char bg)
+    u_int nx, u_int ny, u_char data, u_short attr, u_char fg, u_char bg)
 {
 	u_int	i, j;

--- a/status.c
+++ b/status.c
@@ -1,4 +1,4 @@
-/* $Id: status.c,v 1.44 2008-09-08 17:40:51 nicm Exp $ */
+/* $Id: status.c,v 1.45 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -25,7 +25,7 @@
 #include "tmux.h"

 size_t	status_width(struct winlink *);
-char   *status_print(struct session *, struct winlink *, u_char *);
+char   *status_print(struct session *, struct winlink *, u_short *);

 /* Draw status for client on the last lines of given context. */
 void
@@ -38,7 +38,8 @@ status_redraw(struct client *c)
 	char				lbuf[BUFSIZ], rbuf[BUFSIZ];
 	size_t				llen, rlen, offset, xx, yy;
 	size_t				size, start, width;
-	u_char		 		attr, fg, bg;
+	u_short		 		attr;
+	u_char				fg, bg;
 	struct tm		       *tm;
 	time_t				t;
 	int				larrow, rarrow;
@@ -275,7 +276,7 @@ status_width(struct winlink *wl)
 }

 char *
-status_print(struct session *s, struct winlink *wl, u_char *attr)
+status_print(struct session *s, struct winlink *wl, u_short *attr)
 {
 	char   *text, flag;

--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.183 2008-09-08 17:40:51 nicm Exp $ */
+/* $Id: tmux.h,v 1.184 2008-09-08 22:03:54 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -395,6 +395,8 @@ struct msg_resize_data {
 #define ATTR_HIDDEN 0x20
 #define ATTR_ITALICS 0x40
 #define ATTR_CHARSET 0x80	/* alternative character set */
+#define ATTR_FG256 0x100
+#define ATTR_BG256 0x200

 /* Modes. */
 #define MODE_CURSOR 0x01
@@ -420,7 +422,7 @@ struct screen {
 	char		*title;

 	u_char	       **grid_data;
-	u_char	       **grid_attr;
+	u_short	       **grid_attr;
 	u_char	       **grid_fg;
 	u_char	       **grid_bg;
 	u_int		*grid_size;
@@ -436,13 +438,13 @@ struct screen {

 	u_int		 cx;		/* cursor x */
 	u_int		 cy;		/* cursor y */
-	u_char		 attr;
+	u_short		 attr;
 	u_char		 fg;
 	u_char		 bg;

 	u_int		 saved_cx;
 	u_int		 saved_cy;
-	u_char		 saved_attr;
+	u_short		 saved_attr;
 	u_char		 saved_fg;
 	u_char		 saved_bg;

@@ -692,7 +694,7 @@ struct tty {

 	struct termios   tio;

-	u_char		 attr;
+	u_short		 attr;
 	u_char		 fg;
 	u_char		 bg;

@@ -1139,12 +1141,12 @@ void	 input_key(struct window *, int);

 /* screen-display.c */
 void	 screen_display_set_cell(
-	     struct screen *, u_int, u_int, u_char, u_char, u_char, u_char);
+	     struct screen *, u_int, u_int, u_char, u_short, u_char, u_char);
 void	 screen_display_make_lines(struct screen *, u_int, u_int);
 void	 screen_display_free_lines(struct screen *, u_int, u_int);
 void	 screen_display_move_lines(struct screen *, u_int, u_int, u_int);
 void	 screen_display_fill_area(struct screen *,
-	     u_int, u_int, u_int, u_int, u_char, u_char, u_char, u_char);
+	     u_int, u_int, u_int, u_int, u_char, u_short, u_char, u_char);
 void	 screen_display_scroll_region_up(struct screen *);
 void	 screen_display_scroll_region_down(struct screen *);
 void	 screen_display_insert_lines(struct screen *, u_int, u_int);
@@ -1171,7 +1173,7 @@ size_t printflike2 screen_write_put_string_rjust(
 void printflike2 screen_write_put_string(
 	     struct screen_write_ctx *, const char *, ...);
 void	 screen_write_set_attributes(
-    	     struct screen_write_ctx *, u_char, u_char, u_char);
+	     struct screen_write_ctx *, u_short, u_char, u_char);
 void	 screen_write_set_region(struct screen_write_ctx *, u_int, u_int);
 void	 screen_write_cursor_up_scroll(struct screen_write_ctx *);
 void	 screen_write_cursor_down_scroll(struct screen_write_ctx *);
@@ -1204,7 +1206,7 @@ void	screen_redraw_start(struct screen_redraw_ctx *,
 void	screen_redraw_stop(struct screen_redraw_ctx *);
 void	screen_redraw_move_cursor(struct screen_redraw_ctx *, u_int, u_int);
 void	screen_redraw_set_attributes(
-    	    struct screen_redraw_ctx *, u_char, u_char, u_char);
+	    struct screen_redraw_ctx *, u_short, u_char, u_char);
 void printflike2 screen_redraw_write_string(
    	    struct screen_redraw_ctx *, const char *, ...);
 void	screen_redraw_cell(struct screen_redraw_ctx *, u_int, u_int);
@@ -1223,14 +1225,14 @@ void	 screen_resize(struct screen *, u_int, u_int);
 void	 screen_expand_line(struct screen *, u_int, u_int);
 void	 screen_reduce_line(struct screen *, u_int, u_int);
 void	 screen_get_cell(struct screen *,
-	     u_int, u_int, u_char *, u_char *, u_char *, u_char *);
+	     u_int, u_int, u_char *, u_short *, u_char *, u_char *);
 void	 screen_set_cell(
-    	     struct screen *, u_int, u_int, u_char, u_char, u_char, u_char);
+    	     struct screen *, u_int, u_int, u_char, u_short, u_char, u_char);
 void	 screen_make_lines(struct screen *, u_int, u_int);
 void	 screen_free_lines(struct screen *, u_int, u_int);
 void	 screen_move_lines(struct screen *, u_int, u_int, u_int);
 void	 screen_fill_area(struct screen *,
-	     u_int, u_int, u_int, u_int, u_char, u_char, u_char, u_char);
+	     u_int, u_int, u_int, u_int, u_char, u_short, u_char, u_char);
 void	 screen_set_selection(struct screen *, u_int, u_int, u_int, u_int);
 void	 screen_clear_selection(struct screen *);
 int	 screen_check_selection(struct screen *, u_int, u_int);
--- a/tty.c
+++ b/tty.c
@@ -1,4 +1,4 @@
-/* $Id: tty.c,v 1.39 2008-09-08 21:04:59 nicm Exp $ */
+/* $Id: tty.c,v 1.40 2008-09-08 22:03:56 nicm Exp $ */

 /*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -39,7 +39,9 @@ void	tty_raw(struct tty *, const char *);
 void	tty_puts(struct tty *, const char *);
 void	tty_putc(struct tty *, char);

-void	tty_attributes(struct tty *, u_char, u_char, u_char);
+void	tty_attributes(struct tty *, u_short, u_char, u_char);
+u_char	tty_attributes_fg(struct tty *, u_char);
+u_char	tty_attributes_bg(struct tty *, u_char);
 char	tty_translate(char);

 TAILQ_HEAD(, tty_term) tty_terms = TAILQ_HEAD_INITIALIZER(tty_terms);
@@ -602,17 +604,14 @@ tty_vwrite(struct tty *tty, struct screen *s, int cmd, va_list ap)
 }

 void
-tty_attributes(struct tty *tty, u_char attr, u_char fg, u_char bg)
+tty_attributes(struct tty *tty, u_short attr, u_char fg, u_char bg)
 {
-	char	s[32];
-
 	if (attr == tty->attr && fg == tty->fg && bg == tty->bg)
 		return;

 	/* If any bits are being cleared, reset everything. */
 	if (tty->attr & ~attr) {
-		if ((tty->attr & ATTR_CHARSET) &&
-		    exit_alt_charset_mode != NULL)
+		if ((tty->attr & ATTR_CHARSET) && exit_alt_charset_mode != NULL)
 			tty_puts(tty, exit_alt_charset_mode);
 		tty_puts(tty, exit_attribute_mode);
 		tty->fg = 8;
@@ -620,10 +619,11 @@ tty_attributes(struct tty *tty, u_char attr, u_char fg, u_char bg)
 		tty->attr = 0;
 	}

-	/* Filter out bits already set. */
+	/* Filter out attribute bits already set. */
 	attr &= ~tty->attr;
 	tty->attr |= attr;

+	/* Set the attributes. */
 	if ((attr & ATTR_BRIGHT) && enter_bold_mode != NULL)
 		tty_puts(tty, enter_bold_mode);
 	if ((attr & ATTR_DIM) && enter_dim_mode != NULL)
@@ -641,38 +641,65 @@ tty_attributes(struct tty *tty, u_char attr, u_char fg, u_char bg)
 	if ((attr & ATTR_CHARSET) && enter_alt_charset_mode != NULL)
 		tty_puts(tty, enter_alt_charset_mode);

-	if (fg != tty->fg) {
-		if (fg > 15 && tty->term->flags & TERM_256COLOURS) {
+	/* Set foreground colour. */
+	if (fg != tty->fg || attr & ATTR_FG256)
+		tty->fg = tty_attributes_fg(tty, fg);
+
+	/* Set background colour. */
+	if (bg != tty->bg || attr & ATTR_BG256)
+		tty->bg = tty_attributes_bg(tty, bg);
+}
+
+u_char
+tty_attributes_fg(struct tty *tty, u_char fg)
+{
+	char	s[32];
+
+	if (tty->attr & ATTR_FG256) {
+		if (tty->term->flags & TERM_256COLOURS) {
 			xsnprintf(s, sizeof s, "\033[38;5;%hhum", fg);
 			tty_puts(tty, s);
-		} else {
-			if (fg > 7)
-				fg = 8;
-			if (fg == 8 && !(tty->term->flags & TERM_HASDEFAULTS))
-				fg = 7;
-			if (fg == 8)
-				tty_puts(tty, "\033[39m");
-			else if (set_a_foreground != NULL)
-				tty_puts(tty, tparm(set_a_foreground, fg));
+			return (fg);
 		}
-	}

-	if (bg != tty->bg) {
-		if (bg > 15 && tty->term->flags & TERM_256COLOURS) {
+		if (fg > 15)
+			fg = 8;
+		else if (fg > 7)
+			fg -= 8;
+	}
+		
+	if (fg == 8 && !(tty->term->flags & TERM_HASDEFAULTS))
+		fg = 7;
+	if (fg == 8)
+		tty_puts(tty, "\033[39m");
+	else if (set_a_foreground != NULL)
+		tty_puts(tty, tparm(set_a_foreground, fg));
+	return (fg);
+}
+
+u_char
+tty_attributes_bg(struct tty *tty, u_char bg)
+{
+	char	s[32];
+
+	if (tty->attr & ATTR_BG256) {
+		if (tty->term->flags & TERM_256COLOURS) {
 			xsnprintf(s, sizeof s, "\033[48;5;%hhum", bg);
 			tty_puts(tty, s);
-		} else {
-			if (bg > 7)
-				bg = 8;
-			if (bg == 8 && !(tty->term->flags & TERM_HASDEFAULTS))
-				bg = 0;
-			if (bg == 8)
-				tty_puts(tty, "\033[49m");
-			else if (set_a_background != NULL)
-				tty_puts(tty, tparm(set_a_background, bg));
+			return (bg);
 		}
-	}

-	tty->fg = fg;
-	tty->bg = bg;
+		if (bg > 15)
+			bg = 8;
+		else if (bg > 7)
+			bg -= 8;
+	}
+		
+	if (bg == 8 && !(tty->term->flags & TERM_HASDEFAULTS))
+		bg = 0;
+	if (bg == 8)
+		tty_puts(tty, "\033[49m");
+	else if (set_a_background != NULL)
+		tty_puts(tty, tparm(set_a_background, bg));
+	return (bg);
 }