Adding options -C (compatibility mode) and -c (grotty's old output

scheme) to nroff.

* src/roff/nroff/nroff.sh: Implement it.
Remove `-Wall'.
* NEWS, src/roff/nroff/nroff.man: Updated.

Implementing color support in grotty.  The new switch -c activates
the old drawing scheme, disabling color at the same time.  The new
switch `-i' selects italic instead of underlining (SGR only).

* src/devices/grotty/tty.cc (putstring): New define instead of
`fputs'.  Updated all callers.
(old_drawing_scheme): New global variable.
(COLOR_CHANGE): New enum value.
(SGR_*): New defines containing color handling escape sequences.
(TTY_MAX_COLORS, DEFAULT_COLOR_IDX): New defines.
(glyph): New members `back_color_idx' and `fore_color_idx'.
(glyph::order): Add COLOR_CHANGE.
(tty_printer): New members `cur_fore_idx', `curr_back_idx',
`is_underline', `is_bold', `cu_flag', `tty_colors'.
New methods `make_underline', `make_bold', `color_to_idx',
`change_color', `put_color'.
(cu_flag): Moved into `tty_printer' class.
(tty_printer::tty_printer): Initialize colors.
(tty_printer::add_char, tty_printer::set_char, tty_printer::special,
tty_printer::draw, tty_printer::end_page): Handle colors also.
(main): Add options `-c' and `-i'.
(usage): Updated.
* NEWS, src/devices/grotty/grotty.man: Updated.

* src/include/errarg.h (errarg): Add support for `unsigned int'.
* src/libs/libgroff/errarg.c: Implement it.

* src/include/printer.h (printer): Add `change_color' method
(currently used by grotty only).
* src/libs/libdriver/printer.cc: Implement it.
* src/libs/libdriver/input.cc (parse_D_command, do_file): Add
call to `pr->change_color'.

* src/roff/troff/node.cc (troff_output_file::fill_color,
troff_output_file::glyph_color): Call `do_motion'.

* tmac/tty.tmac: Add color definitions.

* src/roff/groff/groff.man: Minor fixes.

2 files changed, 390 insertions, 75 deletions

diff --git a/src/devices/grotty/grotty.man b/src/devices/grotty/grotty.man
index 4f23ca02..27195763 100644
--- a/src/devices/grotty/grotty.man
+++ b/src/devices/grotty/grotty.man
@@ -1,5 +1,5 @@
 .ig
-Copyright (C) 1989-2000, 2001 Free Software Foundation, Inc.
+Copyright (C) 1989-2000, 2001, 2002 Free Software Foundation, Inc.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
@@ -16,22 +16,28 @@ versions, except that this permission notice may be included in
 translations approved by the Free Software Foundation instead of in
 the original English.
 ..
+.
+.
 .TH GROTTY @MAN1EXT@ "@MDATE@" "Groff Version @VERSION@"
 .SH NAME
 grotty \- groff driver for typewriter-like devices
+.
+.
 .SH SYNOPSIS
 .B grotty
 [
-.B \-hfbuodBUv
+.B \-bBcdfhiouUv
 ] [
 .BI \-F dir
 ] [
-.IR files \|.\|.\|.
+.IR files \|.\|.\|.\&
 ]
 .PP
 It is possible to have whitespace between the
 .B \-F
 option and its parameter.
+.
+.
 .SH DESCRIPTION
 .B grotty
 translates the output of GNU
@@ -60,21 +66,72 @@ will also cause
 to read the standard input.
 Output is written to the standard output.
 .LP
-Normally
+By default,
 .B grotty
-prints a bold character
+emits SGR escape sequences (from ISO 6429, also called ANSI color escapes)
+to change text attributes (bold, italic, colors).
+This makes it possible to have have eight different \M[green]background\M[P]
+and \m[red]foreground\m[P] colors; additionally, bold and italic
+attributes can be used \f[BI]at the same time\f[P] (by using the BI font).
+.LP
+The following colors are defined in
+.BR tty.tmac :
+black, white, red, green, blue, yellow, magenta, cyan.
+Unknown colors are mapped to the default color (which is dependent on the
+settings of the terminal; in most cases, this is black for the foreground
+and white for the background).
+.LP
+Use the
+.B \-c
+switch to revert to the old behaviour, printing a bold character
 .I c
-using the sequence
+with the sequence
 .RI ` c
 .SM BACKSPACE
 .IR c '
-and a italic character
+and an italic character
 .I c
 by the sequence
 .RB ` _
 .SM BACKSPACE
 .IR c '.
-These sequences can be displayed on a terminal
+At the same time, color output is disabled.
+.LP
+For SGR support, it is necessary to use the
+.B \-R
+option of
+.BR less (1)
+to disable the interpretation of
+.BR grotty 's
+old output format.
+Consequently, all programs which use
+.B less
+as the pager program have to pass this option to it.
+For
+.BR man (1)
+in particular, either add
+.B \-R
+to the
+.B $PAGER
+environment variable, e.g.\&
+.RS
+.LP
+.B PAGER="/usr/bin/less -R"
+.br
+.B export PAGER
+.RE
+.LP
+or use the
+.B \-P
+option of
+.B man
+to set the pager executable and its options, or modify the configuration
+file of
+.B man
+in a similar fashion.
+.LP
+.BR grotty 's
+old output format can be displayed on a terminal
 by piping through
 .BR ul (1).
 Pagers such as
@@ -114,11 +171,58 @@ then it will be treated as a bold font.
 The code field in the font description field gives the
 code which will be used to output the character.
 This code can also be used in the
-.B \eN
+.B \[rs]N
 escape sequence in
 .BR troff .
+.
+.
 .SH OPTIONS
 .TP
+.B \-b
+Suppress the use of overstriking for bold characters.
+Ignored if
+.B \-c
+isn't used.
+.
+.TP
+.B \-B
+Use only overstriking for bold-italic characters.
+Ignored if
+.B \-c
+isn't used.
+.
+.TP
+.B \-c
+Use
+.BR grotty 's
+old output format (see above).
+This also disables color output.
+.
+.TP
+.B \-d
+Ignore all
+.B \[rs]D
+commands.
+Without this
+.B grotty
+will render
+.B \[rs]D'l\|.\|.\|.\&'
+commands that have at least one zero argument
+(and so are either horizontal or vertical)
+using
+.BR \- ,
+.BR | ,
+and
+.B +
+characters.
+.
+.TP
+.B \-f
+Use form feeds in the output.
+A form feed will be output at the end of each page that has no output
+on its last line.
+.
+.TP
 .BI \-F dir
 Prepend directory
 .IB dir /dev name
@@ -134,52 +238,48 @@ or
 .B \-h
 Use horizontal tabs in the output.
 Tabs are assumed to be set every 8 columns.
+.
 .TP
-.B \-f
-Use form feeds in the output.
-A form feed will be output at the end of each page that has no output
-on its last line.
+.B \-i
+Use escape sequences to set the italic text attribute instead of the
+underline attribute for italic fonts (`I' and `BI').
+Note that most terminals (including xterm) don't support this.
+Ignored if
+.B \-c
+is active.
+.
 .TP
-.B \-b
-Suppress the use of overstriking for bold characters.
+.B \-o
+Suppress overstriking (other than for bold or underlined characters in
+case the old output format has been activated with
+.BR \-c ).
+.
 .TP
 .B \-u
 Suppress the use of underlining for italic characters.
-.TP
-.B \-B
-Use only overstriking for bold-italic characters.
+Ignored if
+.B \-c
+isn't used.
+.
 .TP
 .B \-U
 Use only underlining for bold-italic characters.
-.TP
-.B \-o
-Suppress overstriking (other than for bold or underlined characters).
-.TP
-.B \-d
-Ignore all
-.B \eD
-commands.
-Without this
-.B grotty
-will render
-.B \eD'l\|.\|.\|.'
-commands that have at least at least one zero argument
-(and so are either horizontal or vertical)
-using
-.BR \- ,
-.B |
-and
-.B +
-characters.
+Ignored if
+.B \-c
+isn't used.
+.
 .TP
 .B \-v
 Print the version number.
+.
+.
 .SH FILES
 .TP
 .B @FONTDIR@/devascii/DESC
 Device description file for
 .B ascii
 device.
+.
 .TP
 .BI @FONTDIR@/devascii/ F
 Font description file for font
@@ -187,11 +287,13 @@ Font description file for font
 of
 .B ascii
 device.
+.
 .TP
 .B @FONTDIR@/devlatin1/DESC
 Device description file for
 .B latin1
 device.
+.
 .TP
 .BI @FONTDIR@/devlatin1/ F
 Font description file for font
@@ -199,11 +301,13 @@ Font description file for font
 of
 .B latin1
 device.
+.
 .TP
 .B @FONTDIR@/devutf8/DESC
 Device description file for
 .B utf8
 device.
+.
 .TP
 .BI @FONTDIR@/devutf8/ F
 Font description file for font
@@ -211,11 +315,13 @@ Font description file for font
 of
 .B utf8
 device.
+.
 .TP
 .B @FONTDIR@/devcp1047/DESC
 Device description file for
 .B cp1047
 device.
+.
 .TP
 .BI @FONTDIR@/devcp1047/ F
 Font description file for font
@@ -223,10 +329,12 @@ Font description file for font
 of
 .B cp1047
 device.
+.
 .TP
 .B @MACRODIR@/tty.tmac
 Macros for use with
 .BR grotty .
+.
 .TP
 .B @MACRODIR@/tty-char.tmac
 Additional klugdey character definitions for use with
@@ -235,6 +343,8 @@ Additional klugdey character definitions for use with
 Note that on EBCDIC hosts, only files for the
 .B cp1047
 device will be installed.
+.
+.
 .SH BUGS
 .LP
 .B grotty
@@ -243,12 +353,22 @@ is intended only for simple documents.
 There is no support for fractional horizontal or vertical motions.
 .LP
 There is no support for
-.B \eD
+.B \[rs]D
 commands
 other than horizontal and vertical lines.
 .LP
-Characters above the first line (ie with a vertical position of 0)
+Characters above the first line (ie with a vertical position of\~0)
 cannot be printed.
+.LP
+Color handling is different compared to
+.BR grops (@MAN1EXT@).
+.B \[rs]M
+doesn't set the fill color for closed graphic objects (which
+.B grotty
+doesn't support anyway) but changes the background color of the character
+cell, affecting all subsequent operations.
+.
+.
 .SH "SEE ALSO"
 .BR groff (@MAN1EXT@),
 .BR @g@troff (@MAN1EXT@),
@@ -257,6 +377,7 @@ cannot be printed.
 .BR groff_char (@MAN7EXT@),
 .BR ul (1),
 .BR more (1),
+.BR man (1),
 .BR less (1)
 .
 .\" Local Variables:
diff --git a/src/devices/grotty/tty.cc b/src/devices/grotty/tty.cc
index d13adbfe..674e6051 100644
--- a/src/devices/grotty/tty.cc
+++ b/src/devices/grotty/tty.cc
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-/* Copyright (C) 1989-2000, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1989-2000, 2001, 2002 Free Software Foundation, Inc.
      Written by James Clark (jjc@jclark.com)
 
 This file is part of groff.
@@ -23,6 +23,8 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
 
 extern "C" const char *Version_string;
 
+#define putstring(s) fputs(s, stdout)
+
 #ifndef SHRT_MIN
 #define SHRT_MIN (-32768)
 #endif
@@ -39,18 +41,34 @@ static int bold_flag = 1;
 static int underline_flag = 1;
 static int overstrike_flag = 1;
 static int draw_flag = 1;
+static int italic_flag = 0;
+static int old_drawing_scheme = 0;
 
 enum {
   UNDERLINE_MODE = 0x01,
   BOLD_MODE = 0x02,
   VDRAW_MODE = 0x04,
   HDRAW_MODE = 0x08,
-  CU_MODE = 0x10
+  CU_MODE = 0x10,
+  COLOR_CHANGE = 0x20
 };
 
 // Mode to use for bold-underlining.
 static unsigned char bold_underline_mode = BOLD_MODE|UNDERLINE_MODE;
 
+// SGR handling (ISO 6429)
+#define SGR_BOLD "\033[1m"
+#define SGR_NO_BOLD "\033[22m"
+#define SGR_ITALIC "\033[3m"
+#define SGR_NO_ITALIC "\033[23m"
+#define SGR_UNDERLINE "\033[4m"
+#define SGR_NO_UNDERLINE "\033[24m"
+#define SGR_DEFAULT_COLOR "\033[39m"
+#define SGR_BACK_DEFAULT_COLOR "\033[49m"
+
+#define TTY_MAX_COLORS 8
+#define DEFAULT_COLOR_IDX TTY_MAX_COLORS
+
 class tty_font : public font {
   tty_font(const char *);
   unsigned char mode;
@@ -109,10 +127,13 @@ public:
   short hpos;
   unsigned int code;
   unsigned char mode;
+  unsigned char back_color_idx;
+  unsigned char fore_color_idx;
   void *operator new(size_t);
   void operator delete(void *);
   inline int draw_mode() { return mode & (VDRAW_MODE|HDRAW_MODE); }
-  inline int order() { return mode & (VDRAW_MODE|HDRAW_MODE|CU_MODE); }
+  inline int order() {
+    return mode & (VDRAW_MODE|HDRAW_MODE|CU_MODE|COLOR_CHANGE); }
 };
 
 glyph *glyph::free_list = 0;
@@ -146,14 +167,25 @@ class tty_printer : public printer {
   int nlines;
   int cached_v;
   int cached_vpos;
-  void add_char(unsigned int, int, int, unsigned char);
+  unsigned char curr_fore_idx;
+  unsigned char curr_back_idx;
+  int is_underline;
+  int is_bold;
+  int cu_flag;
+  color tty_colors[TTY_MAX_COLORS];
+  void make_underline();
+  void make_bold(unsigned int);
+  unsigned char color_to_idx(color *col);
+  void add_char(unsigned int, int, int, color *, color *, unsigned char);
 public:
   tty_printer(const char *device);
   ~tty_printer();
   void set_char(int, font *, const environment *, int, const char *name);
   void draw(int code, int *p, int np, const environment *env);
   void special(char *arg, const environment *env, char type);
+  void change_color(const environment *env);
   void put_char(unsigned int);
+  void put_color(unsigned char, int);
   void begin_page(int) { }
   void end_page(int page_length);
   font *make_font(const char *);
@@ -162,10 +194,35 @@ public:
 tty_printer::tty_printer(const char *device) : cached_v(0)
 {
   is_utf8 = !strcmp(device, "utf8");
+  tty_colors[0].set_rgb(0,			// black
+ 			0,
+			0);
+  tty_colors[1].set_rgb(color::MAX_COLOR_VAL,	// red
+			0,
+			0);
+  tty_colors[2].set_rgb(0,			// green
+			color::MAX_COLOR_VAL,
+			0);
+  tty_colors[3].set_rgb(color::MAX_COLOR_VAL,	// yellow
+			color::MAX_COLOR_VAL,
+			0);
+  tty_colors[4].set_rgb(0,			// blue
+			0,
+			color::MAX_COLOR_VAL);
+  tty_colors[5].set_rgb(color::MAX_COLOR_VAL,	// magenta
+			0,
+			color::MAX_COLOR_VAL);
+  tty_colors[6].set_rgb(0,			// cyan
+			color::MAX_COLOR_VAL,
+			color::MAX_COLOR_VAL);
+  tty_colors[7].set_rgb(color::MAX_COLOR_VAL,	// white
+			color::MAX_COLOR_VAL,
+			color::MAX_COLOR_VAL);
   nlines = 66;
   lines = new glyph *[nlines];
   for (int i = 0; i < nlines; i++)
     lines[i] = 0;
+  cu_flag = 0;
 }
 
 tty_printer::~tty_printer()
@@ -173,15 +230,64 @@ tty_printer::~tty_printer()
   a_delete lines;
 }
 
+void tty_printer::make_underline()
+{
+  if (old_drawing_scheme) {
+    putchar('_');
+    putchar('\b');
+  }
+  else {
+    if (!is_underline) {
+      if (italic_flag)
+	putstring(SGR_ITALIC);
+      else
+	putstring(SGR_UNDERLINE);
+    }
+    is_underline = 1;
+  }
+}
+
+void tty_printer::make_bold(unsigned int c)
+{
+  if (old_drawing_scheme) {
+    put_char(c);
+    putchar('\b');
+  }
+  else {
+    if (!is_bold)
+      putstring(SGR_BOLD);
+    is_bold = 1;
+  }
+}
+
+unsigned char tty_printer::color_to_idx(color *col)
+{
+  if (col->is_default())
+    return DEFAULT_COLOR_IDX;
+  for (int i = 0; i < TTY_MAX_COLORS; i++)
+    if (*col == tty_colors[i])
+      return (unsigned char)i;
+  unsigned r, g, b;
+  col->get_rgb(&r, &g, &b);
+  error("Unknown color (%1, %2, %3) mapped to default", r, g, b);
+  return DEFAULT_COLOR_IDX;
+}
+
 void tty_printer::set_char(int i, font *f, const environment *env,
 			   int w, const char *name)
 {
   if (w != font::hor)
     fatal("width of character not equal to horizontal resolution");
-  add_char(f->get_code(i), env->hpos, env->vpos, ((tty_font *)f)->get_mode());
+  add_char(f->get_code(i),
+	   env->hpos, env->vpos,
+	   env->col, env->fill,
+	   ((tty_font *)f)->get_mode());
 }
 
-void tty_printer::add_char(unsigned int c, int h, int v, unsigned char mode)
+void tty_printer::add_char(unsigned int c,
+			   int h, int v,
+			   color *fore, color *back,
+			   unsigned char mode)
 {
 #if 0
   // This is too expensive.
@@ -221,12 +327,14 @@ void tty_printer::add_char(unsigned int c, int h, int v, unsigned char mode)
   glyph *g = new glyph;
   g->hpos = hpos;
   g->code = c;
+  g->fore_color_idx = color_to_idx(fore);
+  g->back_color_idx = color_to_idx(back);
   g->mode = mode;
 
   // The list will be reversed later.  After reversal, it must be in
-  // increasing order of hpos, with CU specials before HDRAW characters
-  // before VDRAW characters before normal characters at each hpos, and
-  // otherwise in order of occurrence.
+  // increasing order of hpos, with COLOR_CHANGE and CU specials before
+  // HDRAW characters before VDRAW characters before normal characters
+  // at each hpos, and otherwise in order of occurrence.
 
   glyph **pp;
   for (pp = lines + (vpos - 1); *pp; pp = &(*pp)->next)
@@ -240,7 +348,12 @@ void tty_printer::add_char(unsigned int c, int h, int v, unsigned char mode)
 void tty_printer::special(char *arg, const environment *env, char type)
 {
   if (type == 'u')
-    add_char(*arg - '0', env->hpos, env->vpos, CU_MODE);
+    add_char(*arg - '0', env->hpos, env->vpos, env->col, env->fill, CU_MODE);
+}
+
+void tty_printer::change_color(const environment *env)
+{
+  add_char(0, env->hpos, env->vpos, env->col, env->fill, COLOR_CHANGE);
 }
 
 void tty_printer::draw(int code, int *p, int np, const environment *env)
@@ -260,7 +373,7 @@ void tty_printer::draw(int code, int *p, int np, const environment *env)
       len = -len;
     }
     while (len >= 0) {
-      add_char('|', env->hpos, v, VDRAW_MODE);
+      add_char('|', env->hpos, v, env->col, env->fill, VDRAW_MODE);
       len -= font::vert;
       v += font::vert;
     }
@@ -274,7 +387,7 @@ void tty_printer::draw(int code, int *p, int np, const environment *env)
       len = -len;
     }
     while (len >= 0) {
-      add_char('-', h, env->vpos, HDRAW_MODE);
+      add_char('-', h, env->vpos, env->col, env->fill, HDRAW_MODE);
       len -= font::hor;
       h += font::hor;
     }
@@ -302,14 +415,24 @@ void tty_printer::put_char(unsigned int wc)
     do *++p = (unsigned char)(((wc >> (6 * --count)) & 0x3f) | 0x80);
       while (count > 0);
     *++p = '\0';
-    fputs(buf, stdout);
+    putstring(buf);
   }
-  else {
+  else
     putchar(wc);
-  }
 }
 
-int cu_flag = 0;
+void tty_printer::put_color(unsigned char color_index, int back)
+{
+  if (color_index == DEFAULT_COLOR_IDX)
+    color_index = 9;
+  putstring("\033[");
+  if (back)
+    putchar('4');
+  else
+    putchar('3');
+  putchar(color_index + '0');
+  putchar('m');
+}
 
 void tty_printer::end_page(int page_length)
 {
@@ -345,6 +468,10 @@ void tty_printer::end_page(int page_length)
     }
     int hpos = 0;
     glyph *nextp;
+    curr_fore_idx = DEFAULT_COLOR_IDX;
+    curr_back_idx = DEFAULT_COLOR_IDX;
+    is_underline = 0;
+    is_bold = 0;
     for (p = g; p; delete p, p = nextp) {
       nextp = p->next;
       if (p->mode & CU_MODE) {
@@ -376,34 +503,88 @@ void tty_printer::end_page(int page_length)
 	    int next_tab_pos = ((hpos + TAB_WIDTH) / TAB_WIDTH) * TAB_WIDTH;
 	    if (next_tab_pos > p->hpos)
 	      break;
-	    if (cu_flag) {
-	      putchar('_');
-	      putchar('\b');
+	    if (cu_flag)
+	      make_underline();
+	    else if (!old_drawing_scheme && is_underline) {
+	      if (italic_flag)
+		putstring(SGR_NO_ITALIC);
+	      else
+		putstring(SGR_NO_UNDERLINE);
+	      is_underline = 0;
 	    }
 	    putchar('\t');
 	    hpos = next_tab_pos;
 	  }
 	}
 	for (; hpos < p->hpos; hpos++) {
-	  if (cu_flag) {
-	    putchar('_');
-	    putchar('\b');
+	  if (cu_flag)
+	    make_underline();
+	  else if (!old_drawing_scheme && is_underline) {
+	    if (italic_flag)
+	      putstring(SGR_NO_ITALIC);
+	    else
+	      putstring(SGR_NO_UNDERLINE);
+	    is_underline = 0;
 	  }
 	  putchar(' ');
 	}
       }
       assert(hpos == p->hpos);
-      if (p->mode & UNDERLINE_MODE) {
-	putchar('_');
-	putchar('\b');
+      if (p->mode & COLOR_CHANGE) {
+	if (!old_drawing_scheme) {
+	  if (p->fore_color_idx != curr_fore_idx) {
+	    put_color(p->fore_color_idx, 0);
+	    curr_fore_idx = p->fore_color_idx;
+	  }
+	  if (p->back_color_idx != curr_back_idx) {
+	    put_color(p->back_color_idx, 1);
+	    curr_back_idx = p->back_color_idx;
+	  }
+	}
+	continue;
+      }
+      if (p->mode & UNDERLINE_MODE)
+	make_underline();
+      else if (!old_drawing_scheme && is_underline) {
+	if (italic_flag)
+	  putstring(SGR_NO_ITALIC);
+	else
+	  putstring(SGR_NO_UNDERLINE);
+	is_underline = 0;
       }
-      if (p->mode & BOLD_MODE) {
-	put_char(p->code);
-	putchar('\b');
+      if (p->mode & BOLD_MODE)
+	make_bold(p->code);
+      else if (!old_drawing_scheme && is_bold) {
+	putstring(SGR_NO_BOLD);
+	is_bold = 0;
+      }
+      if (!old_drawing_scheme) {
+	if (p->fore_color_idx != curr_fore_idx) {
+	  put_color(p->fore_color_idx, 0);
+	  curr_fore_idx = p->fore_color_idx;
+	}
+	if (p->back_color_idx != curr_back_idx) {
+	  put_color(p->back_color_idx, 1);
+	  curr_back_idx = p->back_color_idx;
+	}
       }
       put_char(p->code);
       hpos++;
     }
+    if (!old_drawing_scheme) {
+      if (is_underline) {
+	if (italic_flag)
+	  putstring(SGR_NO_ITALIC);
+	else
+	  putstring(SGR_NO_UNDERLINE);
+      }
+      if (is_bold)
+	putstring(SGR_NO_BOLD);
+      if (curr_fore_idx != DEFAULT_COLOR_IDX)
+	putstring(SGR_DEFAULT_COLOR);
+      if (curr_back_idx != DEFAULT_COLOR_IDX)
+	putstring(SGR_BACK_DEFAULT_COLOR);
+    }
     putchar('\n');
   }
   if (form_feed_flag) {
@@ -439,19 +620,25 @@ int main(int argc, char **argv)
     { "version", no_argument, 0, 'v' },
     { NULL, 0, 0, 0 }
   };
-  while ((c = getopt_long(argc, argv, "F:vhfbuoBUd", long_options, NULL))
+  while ((c = getopt_long(argc, argv, "F:vhfbciuoBUd", long_options, NULL))
 	 != EOF)
     switch(c) {
     case 'v':
-      {
-	printf("GNU grotty (groff) version %s\n", Version_string);
-	exit(0);
-	break;
-      }
+      printf("GNU grotty (groff) version %s\n", Version_string);
+      exit(0);
+      break;
+    case 'i':
+      // Use italic font instead of underlining.
+      italic_flag = 1;
+      break;
     case 'b':
       // Do not embolden by overstriking.
       bold_flag = 0;
       break;
+    case 'c':
+      // Use old scheme for emboldening and underline.
+      old_drawing_scheme = 1;
+      break;
     case 'u':
       // Do not underline.
       underline_flag = 0;
@@ -493,6 +680,13 @@ int main(int argc, char **argv)
     default:
       assert(0);
     }
+  if (old_drawing_scheme)
+    italic_flag = 0;
+  else {
+    bold_underline_mode = BOLD_MODE|UNDERLINE_MODE;
+    bold_flag = 1;
+    underline_flag = 1;
+  }
   if (optind >= argc)
     do_file("-");
   else {
@@ -505,6 +699,6 @@ int main(int argc, char **argv)
 
 static void usage(FILE *stream)
 {
-  fprintf(stream, "usage: %s [-hfvbuodBU] [-F dir] [files ...]\n",
+  fprintf(stream, "usage: %s [-hfvbciuodBU] [-F dir] [files ...]\n",
 	  program_name);
 }