4.4BSD/usr/src/contrib/groff-1.08/grops/ps.cc
// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "driver.h"
#include "stringclass.h"
#include "cset.h"
#include "ps.h"
static int landscape_flag = 0;
static int ncopies = 1;
static int linewidth = -1;
// Non-zero means generate PostScript code that guesses the paper
// length using the imageable area.
static int guess_flag = 0;
// Non-zero if -b was specified on the command line.
static int bflag = 0;
unsigned broken_flags = 0;
#define DEFAULT_LINEWIDTH 40 /* in ems/1000 */
#define FILL_MAX 1000
const char *const dict_name = "grops";
const char *const defs_dict_name = "DEFS";
const int DEFS_DICT_SPARE = 50;
double degrees(double r)
{
return r*180.0/M_PI;
}
double radians(double d)
{
return d*M_PI/180.0;
}
inline double transform_fill(int fill)
{
return 1 - fill/double(FILL_MAX);
}
ps_output::ps_output(FILE *f, int n)
: fp(f), max_line_length(n), col(0), need_space(0), fixed_point(0)
{
}
ps_output &ps_output::set_file(FILE *f)
{
fp = f;
col = 0;
return *this;
}
ps_output &ps_output::copy_file(FILE *infp)
{
int c;
while ((c = getc(infp)) != EOF)
putc(c, fp);
return *this;
}
ps_output &ps_output::end_line()
{
if (col != 0) {
putc('\n', fp);
col = 0;
need_space = 0;
}
return *this;
}
ps_output &ps_output::special(const char *s)
{
if (s == 0 || *s == '\0')
return *this;
if (col != 0) {
putc('\n', fp);
col = 0;
}
fputs(s, fp);
if (strchr(s, '\0')[-1] != '\n')
putc('\n', fp);
need_space = 0;
return *this;
}
ps_output &ps_output::simple_comment(const char *s)
{
if (col != 0)
putc('\n', fp);
putc('%', fp);
putc('%', fp);
fputs(s, fp);
putc('\n', fp);
col = 0;
need_space = 0;
return *this;
}
ps_output &ps_output::begin_comment(const char *s)
{
if (col != 0)
putc('\n', fp);
putc('%', fp);
putc('%', fp);
fputs(s, fp);
col = 2 + strlen(s);
return *this;
}
ps_output &ps_output::end_comment()
{
if (col != 0) {
putc('\n', fp);
col = 0;
}
need_space = 0;
return *this;
}
ps_output &ps_output::comment_arg(const char *s)
{
int len = strlen(s);
if (col + len + 1 > max_line_length) {
putc('\n', fp);
fputs("%%+", fp);
col = 3;
}
putc(' ', fp);
fputs(s, fp);
col += len + 1;
return *this;
}
ps_output &ps_output::set_fixed_point(int n)
{
assert(n >= 0 && n <= 10);
fixed_point = n;
return *this;
}
ps_output &ps_output::put_delimiter(char c)
{
if (col + 1 > max_line_length) {
putc('\n', fp);
col = 0;
}
putc(c, fp);
col++;
need_space = 0;
return *this;
}
ps_output &ps_output::put_string(const char *s, int n)
{
int len = 0;
for (int i = 0; i < n; i++) {
char c = s[i];
if (isascii(c) && isprint(c)) {
if (c == '(' || c == ')' || c == '\\')
len += 2;
else
len += 1;
}
else
len += 4;
}
if (len > n*2) {
if (col + n*2 + 2 > max_line_length && n*2 + 2 <= max_line_length) {
putc('\n', fp);
col = 0;
}
if (col + 1 > max_line_length) {
putc('\n', fp);
col = 0;
}
putc('<', fp);
col++;
for (i = 0; i < n; i++) {
if (col + 2 > max_line_length) {
putc('\n', fp);
col = 0;
}
fprintf(fp, "%02x", s[i] & 0377);
col += 2;
}
putc('>', fp);
col++;
}
else {
if (col + len + 2 > max_line_length && len + 2 <= max_line_length) {
putc('\n', fp);
col = 0;
}
if (col + 2 > max_line_length) {
putc('\n', fp);
col = 0;
}
putc('(', fp);
col++;
for (i = 0; i < n; i++) {
char c = s[i];
if (isascii(c) && isprint(c)) {
if (c == '(' || c == ')' || c == '\\')
len = 2;
else
len = 1;
}
else
len = 4;
if (col + len + 1 > max_line_length) {
putc('\\', fp);
putc('\n', fp);
col = 0;
}
switch (len) {
case 1:
putc(c, fp);
break;
case 2:
putc('\\', fp);
putc(c, fp);
break;
case 4:
fprintf(fp, "\\%03o", c & 0377);
break;
default:
assert(0);
}
col += len;
}
putc(')', fp);
col++;
}
need_space = 0;
return *this;
}
ps_output &ps_output::put_number(int n)
{
char buf[1 + INT_DIGITS + 1];
sprintf(buf, "%d", n);
int len = strlen(buf);
if (col > 0 && col + len + need_space > max_line_length) {
putc('\n', fp);
col = 0;
need_space = 0;
}
if (need_space) {
putc(' ', fp);
col++;
}
fputs(buf, fp);
col += len;
need_space = 1;
return *this;
}
ps_output &ps_output::put_fix_number(int i)
{
const char *p = iftoa(i, fixed_point);
int len = strlen(p);
if (col > 0 && col + len + need_space > max_line_length) {
putc('\n', fp);
col = 0;
need_space = 0;
}
if (need_space) {
putc(' ', fp);
col++;
}
fputs(p, fp);
col += len;
need_space = 1;
return *this;
}
ps_output &ps_output::put_float(double d)
{
char buf[128];
sprintf(buf, "%.4f", d);
int len = strlen(buf);
if (col > 0 && col + len + need_space > max_line_length) {
putc('\n', fp);
col = 0;
need_space = 0;
}
if (need_space) {
putc(' ', fp);
col++;
}
fputs(buf, fp);
col += len;
need_space = 1;
return *this;
}
ps_output &ps_output::put_symbol(const char *s)
{
int len = strlen(s);
if (col > 0 && col + len + need_space > max_line_length) {
putc('\n', fp);
col = 0;
need_space = 0;
}
if (need_space) {
putc(' ', fp);
col++;
}
fputs(s, fp);
col += len;
need_space = 1;
return *this;
}
ps_output &ps_output::put_literal_symbol(const char *s)
{
int len = strlen(s);
if (col > 0 && col + len + 1 > max_line_length) {
putc('\n', fp);
col = 0;
}
putc('/', fp);
fputs(s, fp);
col += len + 1;
need_space = 1;
return *this;
}
class ps_font : public font {
ps_font(const char *);
public:
int encoding_index;
char *encoding;
char *reencoded_name;
~ps_font();
void handle_unknown_font_command(const char *command, const char *arg,
const char *filename, int lineno);
static ps_font *load_ps_font(const char *);
};
ps_font *ps_font::load_ps_font(const char *s)
{
ps_font *f = new ps_font(s);
if (!f->load()) {
delete f;
return 0;
}
return f;
}
ps_font::ps_font(const char *nm)
: font(nm), encoding(0), reencoded_name(0), encoding_index(-1)
{
}
ps_font::~ps_font()
{
a_delete encoding;
a_delete reencoded_name;
}
void ps_font::handle_unknown_font_command(const char *command, const char *arg,
const char *filename, int lineno)
{
if (strcmp(command, "encoding") == 0) {
if (arg == 0)
error_with_file_and_line(filename, lineno,
"`encoding' command requires an argument");
else
encoding = strsave(arg);
}
}
static void handle_unknown_desc_command(const char *command, const char *arg,
const char *filename, int lineno)
{
if (strcmp(command, "broken") == 0) {
if (arg == 0)
error_with_file_and_line(filename, lineno,
"`broken' command requires an argument");
else if (!bflag)
broken_flags = atoi(arg);
}
}
struct style {
font *f;
int point_size;
int height;
int slant;
style();
style(font *, int, int, int);
int operator==(const style &) const;
int operator!=(const style &) const;
};
style::style() : f(0)
{
}
style::style(font *p, int sz, int h, int sl)
: f(p), point_size(sz), height(h), slant(sl)
{
}
int style::operator==(const style &s) const
{
return (f == s.f && point_size == s.point_size
&& height == s.height && slant == s.slant);
}
int style::operator!=(const style &s) const
{
return !(*this == s);
}
class ps_printer : public printer {
FILE *tempfp;
ps_output out;
int res;
int space_char_index;
int pages_output;
int paper_length;
int equalise_spaces;
enum { SBUF_SIZE = 256 };
char sbuf[SBUF_SIZE];
int sbuf_len;
int sbuf_start_hpos;
int sbuf_vpos;
int sbuf_end_hpos;
int sbuf_space_width;
int sbuf_space_count;
int sbuf_space_diff_count;
int sbuf_space_code;
int sbuf_kern;
style sbuf_style;
style output_style;
int output_hpos;
int output_vpos;
int output_draw_point_size;
int line_thickness;
int output_line_thickness;
int fill;
unsigned char output_space_code;
enum { MAX_DEFINED_STYLES = 50 };
style defined_styles[MAX_DEFINED_STYLES];
int ndefined_styles;
int next_encoding_index;
string defs;
int ndefs;
resource_manager rm;
int invis_count;
void flush_sbuf();
void set_style(const style &);
void set_space_code(unsigned char c);
int set_encoding_index(ps_font *);
void do_exec(char *, const environment *);
void do_import(char *, const environment *);
void do_def(char *, const environment *);
void do_mdef(char *, const environment *);
void do_file(char *, const environment *);
void do_invis(char *, const environment *);
void do_endinvis(char *, const environment *);
void set_line_thickness(const environment *);
void fill_path();
void encode_fonts();
void define_encoding(const char *, int);
void reencode_font(ps_font *);
public:
ps_printer();
~ps_printer();
void set_char(int i, font *f, const environment *env, int w);
void draw(int code, int *p, int np, const environment *env);
void begin_page(int);
void end_page(int);
void special(char *arg, const environment *env);
font *make_font(const char *);
void end_of_line();
};
ps_printer::ps_printer()
: pages_output(0),
sbuf_len(0),
output_hpos(-1),
output_vpos(-1),
out(0, 79),
ndefined_styles(0),
next_encoding_index(0),
line_thickness(-1),
fill(FILL_MAX + 1),
ndefs(0),
invis_count(0)
{
tempfp = xtmpfile();
out.set_file(tempfp);
if (linewidth < 0)
linewidth = DEFAULT_LINEWIDTH;
if (font::hor != 1)
fatal("horizontal resolution must be 1");
if (font::vert != 1)
fatal("vertical resolution must be 1");
if (font::res % (font::sizescale*72) != 0)
fatal("res must be a multiple of 72*sizescale");
int r = font::res;
int point = 0;
while (r % 10 == 0) {
r /= 10;
point++;
}
res = r;
out.set_fixed_point(point);
space_char_index = font::name_to_index("space");
paper_length = font::paperlength;
if (paper_length == 0)
paper_length = 11*font::res;
equalise_spaces = font::res >= 72000;
}
int ps_printer::set_encoding_index(ps_font *f)
{
if (f->encoding_index >= 0)
return f->encoding_index;
for (font_pointer_list *p = font_list; p; p = p->next)
if (p->p != f) {
char *encoding = ((ps_font *)p->p)->encoding;
int encoding_index = ((ps_font *)p->p)->encoding_index;
if (encoding != 0 && encoding_index >= 0
&& strcmp(f->encoding, encoding) == 0) {
return f->encoding_index = encoding_index;
}
}
return f->encoding_index = next_encoding_index++;
}
void ps_printer::set_char(int i, font *f, const environment *env, int w)
{
if (i == space_char_index || invis_count > 0)
return;
unsigned char code = f->get_code(i);
style sty(f, env->size, env->height, env->slant);
if (sty.slant != 0) {
if (sty.slant > 80 || sty.slant < -80) {
error("silly slant `%1' degrees", sty.slant);
sty.slant = 0;
}
}
if (sbuf_len > 0) {
if (sbuf_len < SBUF_SIZE
&& sty == sbuf_style
&& sbuf_vpos == env->vpos) {
if (sbuf_end_hpos == env->hpos) {
sbuf[sbuf_len++] = code;
sbuf_end_hpos += w + sbuf_kern;
return;
}
if (sbuf_len == 1 && sbuf_kern == 0) {
sbuf_kern = env->hpos - sbuf_end_hpos;
sbuf_end_hpos = env->hpos + sbuf_kern + w;
sbuf[sbuf_len++] = code;
return;
}
/* If sbuf_end_hpos - sbuf_kern == env->hpos, we are better off
starting a new string. */
if (sbuf_len < SBUF_SIZE - 1 && env->hpos >= sbuf_end_hpos
&& (sbuf_kern == 0 || sbuf_end_hpos - sbuf_kern != env->hpos)) {
if (sbuf_space_code < 0) {
if (f->contains(space_char_index)) {
sbuf_space_code = f->get_code(space_char_index);
sbuf_space_width = env->hpos - sbuf_end_hpos;
sbuf_end_hpos = env->hpos + w + sbuf_kern;
sbuf[sbuf_len++] = sbuf_space_code;
sbuf[sbuf_len++] = code;
sbuf_space_count++;
return;
}
}
else {
int diff = env->hpos - sbuf_end_hpos - sbuf_space_width;
if (diff == 0 || (equalise_spaces && (diff == 1 || diff == -1))) {
sbuf_end_hpos = env->hpos + w + sbuf_kern;
sbuf[sbuf_len++] = sbuf_space_code;
sbuf[sbuf_len++] = code;
sbuf_space_count++;
if (diff == 1)
sbuf_space_diff_count++;
else if (diff == -1)
sbuf_space_diff_count--;
return;
}
}
}
}
flush_sbuf();
}
sbuf_len = 1;
sbuf[0] = code;
sbuf_end_hpos = env->hpos + w;
sbuf_start_hpos = env->hpos;
sbuf_vpos = env->vpos;
sbuf_style = sty;
sbuf_space_code = -1;
sbuf_space_width = 0;
sbuf_space_count = sbuf_space_diff_count = 0;
sbuf_kern = 0;
}
int is_small_h(int n)
{
return n < (font::res*2)/72 && n > -(font::res*10)/72;
}
int is_small_v(int n)
{
return n < (font::res*4)/72 && n > -(font::res*4)/72;
}
static char *make_encoding_name(int encoding_index)
{
static char buf[3 + INT_DIGITS + 1];
sprintf(buf, "ENC%d", encoding_index);
return buf;
}
const char *const WS = " \t\n\r";
void ps_printer::define_encoding(const char *encoding, int encoding_index)
{
char *vec[256];
for (int i = 0; i < 256; i++)
vec[i] = 0;
char *path;
FILE *fp = font::open_file(encoding, &path);
if (fp == 0)
fatal("can't open encoding file `%1'", encoding);
int lineno = 1;
char buf[256];
while (fgets(buf, 512, fp) != 0) {
char *p = buf;
while (isascii(*p) && isspace(*p))
p++;
if (*p != '#' && *p != '\0' && (p = strtok(buf, WS)) != 0) {
char *q = strtok(0, WS);
int n;
if (q == 0 || sscanf(q, "%d", &n) != 1 || n < 0 || n >= 256)
fatal_with_file_and_line(path, lineno, "bad second field");
vec[n] = new char[strlen(p) + 1];
strcpy(vec[n], p);
}
lineno++;
}
a_delete path;
out.put_literal_symbol(make_encoding_name(encoding_index));
out.put_delimiter('[');
for (i = 0; i < 256; i++) {
if (vec[i] == 0)
out.put_literal_symbol(".notdef");
else {
out.put_literal_symbol(vec[i]);
a_delete vec[i];
}
}
out.put_delimiter(']').put_symbol("def");
}
void ps_printer::reencode_font(ps_font *f)
{
out.put_literal_symbol(f->reencoded_name)
.put_symbol(make_encoding_name(f->encoding_index))
.put_literal_symbol(f->get_internal_name())
.put_symbol("RE");
}
void ps_printer::encode_fonts()
{
if (next_encoding_index == 0)
return;
char *done_encoding = new char[next_encoding_index];
for (int i = 0; i < next_encoding_index; i++)
done_encoding[i] = 0;
for (font_pointer_list *f = font_list; f; f = f->next) {
int encoding_index = ((ps_font *)f->p)->encoding_index;
if (encoding_index >= 0) {
assert(encoding_index < next_encoding_index);
if (!done_encoding[encoding_index]) {
done_encoding[encoding_index] = 1;
define_encoding(((ps_font *)f->p)->encoding, encoding_index);
}
reencode_font((ps_font *)f->p);
}
}
a_delete done_encoding;
}
void ps_printer::set_style(const style &sty)
{
char buf[1 + INT_DIGITS + 1];
for (int i = 0; i < ndefined_styles; i++)
if (sty == defined_styles[i]) {
sprintf(buf, "F%d", i);
out.put_symbol(buf);
return;
}
if (ndefined_styles >= MAX_DEFINED_STYLES)
ndefined_styles = 0;
sprintf(buf, "F%d", ndefined_styles);
out.put_literal_symbol(buf);
const char *psname = sty.f->get_internal_name();
if (psname == 0)
fatal("no internalname specified for font `%1'", sty.f->get_name());
char *encoding = ((ps_font *)sty.f)->encoding;
if (encoding != 0) {
char *s = ((ps_font *)sty.f)->reencoded_name;
if (s == 0) {
int ei = set_encoding_index((ps_font *)sty.f);
char *tem = new char[strlen(psname) + 1 + INT_DIGITS + 1];
sprintf(tem, "%s@%d", psname, ei);
psname = tem;
((ps_font *)sty.f)->reencoded_name = tem;
}
else
psname = s;
}
out.put_fix_number((font::res/(72*font::sizescale))*sty.point_size);
if (sty.height != 0 || sty.slant != 0) {
int h = sty.height == 0 ? sty.point_size : sty.height;
h *= font::res/(72*font::sizescale);
int c = int(h*tan(radians(sty.slant)) + .5);
out.put_fix_number(c).put_fix_number(h).put_literal_symbol(psname)
.put_symbol("MF");
}
else {
out.put_literal_symbol(psname).put_symbol("SF");
}
defined_styles[ndefined_styles++] = sty;
}
void ps_printer::set_space_code(unsigned char c)
{
out.put_literal_symbol("SC").put_number(c).put_symbol("def");
}
void ps_printer::end_of_line()
{
flush_sbuf();
// this ensures that we do an absolute motion to the beginning of a line
output_vpos = output_hpos = -1;
}
void ps_printer::flush_sbuf()
{
enum {
NONE,
RELATIVE_H,
RELATIVE_V,
RELATIVE_HV,
ABSOLUTE
} motion = NONE;
int space_flag = 0;
if (sbuf_len == 0)
return;
if (output_style != sbuf_style) {
set_style(sbuf_style);
output_style = sbuf_style;
}
int extra_space = 0;
if (output_hpos < 0 || output_vpos < 0
|| !is_small_h(output_hpos - sbuf_start_hpos)
|| !is_small_v(output_vpos - sbuf_vpos))
motion = ABSOLUTE;
else {
if (output_hpos != sbuf_start_hpos)
motion = RELATIVE_H;
if (output_vpos != sbuf_vpos) {
if (motion != NONE)
motion = RELATIVE_HV;
else
motion = RELATIVE_V;
}
}
if (sbuf_space_code >= 0) {
int w = sbuf_style.f->get_width(space_char_index, sbuf_style.point_size);
if (w + sbuf_kern != sbuf_space_width) {
if (sbuf_space_code != output_space_code) {
set_space_code(sbuf_space_code);
output_space_code = sbuf_space_code;
}
space_flag = 1;
extra_space = sbuf_space_width - w - sbuf_kern;
if (sbuf_space_diff_count > sbuf_space_count/2)
extra_space++;
else if (sbuf_space_diff_count < -(sbuf_space_count/2))
extra_space--;
}
}
if (space_flag)
out.put_fix_number(extra_space);
if (sbuf_kern != 0)
out.put_fix_number(sbuf_kern);
out.put_string(sbuf, sbuf_len);
char sym[2];
sym[0] = 'A' + motion*4 + space_flag + 2*(sbuf_kern != 0);
sym[1] = '\0';
switch (motion) {
case NONE:
break;
case ABSOLUTE:
out.put_fix_number(sbuf_start_hpos)
.put_fix_number(sbuf_vpos);
break;
case RELATIVE_H:
out.put_fix_number(sbuf_start_hpos - output_hpos);
break;
case RELATIVE_V:
out.put_fix_number(sbuf_vpos - output_vpos);
break;
case RELATIVE_HV:
out.put_fix_number(sbuf_start_hpos - output_hpos)
.put_fix_number(sbuf_vpos - output_vpos);
break;
default:
assert(0);
}
out.put_symbol(sym);
output_hpos = sbuf_end_hpos;
output_vpos = sbuf_vpos;
sbuf_len = 0;
}
void ps_printer::set_line_thickness(const environment *env)
{
if (line_thickness < 0) {
if (output_draw_point_size != env->size) {
// we ought to check for overflow here
int lw = ((font::res/(72*font::sizescale))*linewidth*env->size)/1000;
out.put_fix_number(lw).put_symbol("LW");
output_draw_point_size = env->size;
output_line_thickness = -1;
}
}
else {
if (output_line_thickness != line_thickness) {
out.put_fix_number(line_thickness).put_symbol("LW");
output_line_thickness = line_thickness;
output_draw_point_size = -1;
}
}
}
void ps_printer::fill_path()
{
if (fill > FILL_MAX)
out.put_symbol("BL");
else
out.put_float(transform_fill(fill)).put_symbol("FL");
}
void ps_printer::draw(int code, int *p, int np, const environment *env)
{
if (invis_count > 0)
return;
int fill_flag = 0;
switch (code) {
case 'C':
fill_flag = 1;
// fall through
case 'c':
// troff adds an extra argument to C
if (np != 1 && !(code == 'C' && np == 2)) {
error("1 argument required for circle");
break;
}
out.put_fix_number(env->hpos + p[0]/2)
.put_fix_number(env->vpos)
.put_fix_number(p[0]/2)
.put_symbol("DC");
if (fill_flag) {
fill_path();
}
else {
set_line_thickness(env);
out.put_symbol("ST");
}
break;
case 'l':
if (np != 2) {
error("2 arguments required for line");
break;
}
set_line_thickness(env);
out.put_fix_number(p[0] + env->hpos)
.put_fix_number(p[1] + env->vpos)
.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("DL");
break;
case 'E':
fill_flag = 1;
// fall through
case 'e':
if (np != 2) {
error("2 arguments required for ellipse");
break;
}
out.put_fix_number(p[0])
.put_fix_number(p[1])
.put_fix_number(env->hpos + p[0]/2)
.put_fix_number(env->vpos)
.put_symbol("DE");
if (fill_flag) {
fill_path();
}
else {
set_line_thickness(env);
out.put_symbol("ST");
}
break;
case 'P':
fill_flag = 1;
// fall through
case 'p':
{
if (np & 1) {
error("even number of arguments required for polygon");
break;
}
if (np == 0) {
error("no arguments for polygon");
break;
}
out.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("MT");
for (int i = 0; i < np; i += 2)
out.put_fix_number(p[i])
.put_fix_number(p[i+1])
.put_symbol("RL");
out.put_symbol("CL");
if (fill_flag) {
fill_path();
}
else {
set_line_thickness(env);
out.put_symbol("ST");
}
break;
}
case '~':
{
if (np & 1) {
error("even number of arguments required for spline");
break;
}
if (np == 0) {
error("no arguments for spline");
break;
}
out.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("MT");
out.put_fix_number(p[0]/2)
.put_fix_number(p[1]/2)
.put_symbol("RL");
/* tnum/tden should be between 0 and 1; the closer it is to 1
the tighter the curve will be to the guiding lines; 2/3
is the standard value */
const int tnum = 2;
const int tden = 3;
for (int i = 0; i < np - 2; i += 2) {
out.put_fix_number((p[i]*tnum)/(2*tden))
.put_fix_number((p[i + 1]*tnum)/(2*tden))
.put_fix_number(p[i]/2 + (p[i + 2]*(tden - tnum))/(2*tden))
.put_fix_number(p[i + 1]/2 + (p[i + 3]*(tden - tnum))/(2*tden))
.put_fix_number((p[i] - p[i]/2) + p[i + 2]/2)
.put_fix_number((p[i + 1] - p[i + 1]/2) + p[i + 3]/2)
.put_symbol("RC");
}
out.put_fix_number(p[np - 2] - p[np - 2]/2)
.put_fix_number(p[np - 1] - p[np - 1]/2)
.put_symbol("RL");
set_line_thickness(env);
out.put_symbol("ST");
}
break;
case 'a':
{
if (np != 4) {
error("4 arguments required for arc");
break;
}
set_line_thickness(env);
double c[2];
if (adjust_arc_center(p, c))
out.put_fix_number(env->hpos + int(c[0]))
.put_fix_number(env->vpos + int(c[1]))
.put_fix_number(int(sqrt(c[0]*c[0] + c[1]*c[1])))
.put_float(degrees(atan2(-c[1], -c[0])))
.put_float(degrees(atan2(p[1] + p[3] - c[1], p[0] + p[2] - c[0])))
.put_symbol("DA");
else
out.put_fix_number(p[0] + p[2] + env->hpos)
.put_fix_number(p[1] + p[3] + env->vpos)
.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("DL");
}
break;
case 't':
{
if (np == 0) {
line_thickness = -1;
}
else {
// troff gratuitously adds an extra 0
if (np != 1 && np != 2) {
error("0 or 1 argument required for thickness");
break;
}
line_thickness = p[0];
}
break;
}
case 'f':
{
if (np != 1 && np != 2) {
error("1 argument required for fill");
break;
}
fill = p[0];
if (fill < 0 || fill > FILL_MAX) {
// This means fill with the current color.
fill = FILL_MAX + 1;
}
break;
}
default:
error("unrecognised drawing command `%1'", char(code));
break;
}
output_hpos = output_vpos = -1;
}
void ps_printer::begin_page(int n)
{
out.begin_comment("Page:").comment_arg(itoa(n));
out.comment_arg(itoa(++pages_output)).end_comment();
output_style.f = 0;
output_space_code = 32;
output_draw_point_size = -1;
output_line_thickness = -1;
output_hpos = output_vpos = -1;
ndefined_styles = 0;
out.simple_comment("BeginPageSetup");
out.put_symbol("BP");
out.simple_comment("EndPageSetup");
}
void ps_printer::end_page(int)
{
flush_sbuf();
out.put_symbol("EP");
if (invis_count != 0) {
error("missing `endinvis' command");
invis_count = 0;
}
}
font *ps_printer::make_font(const char *nm)
{
return ps_font::load_ps_font(nm);
}
ps_printer::~ps_printer()
{
out.simple_comment("Trailer");
out.put_symbol("end");
out.simple_comment("EOF");
if (fseek(tempfp, 0L, 0) < 0)
fatal("fseek on temporary file failed");
fputs("%!PS-Adobe-", stdout);
fputs((broken_flags & USE_PS_ADOBE_2_0) ? "2.0" : "3.0", stdout);
putchar('\n');
out.set_file(stdout);
{
extern const char *version_string;
out.begin_comment("Creator:")
.comment_arg("groff")
.comment_arg("version")
.comment_arg(version_string)
.end_comment();
}
for (font_pointer_list *f = font_list; f; f = f->next) {
ps_font *psf = (ps_font *)(f->p);
rm.need_font(psf->get_internal_name());
}
rm.print_header_comments(out);
out.begin_comment("Pages:").comment_arg(itoa(pages_output)).end_comment();
out.begin_comment("PageOrder:").comment_arg("Ascend").end_comment();
#if 0
fprintf(out.get_file(), "%%%%DocumentMedia: () %g %g 0 () ()\n",
font::paperwidth*72.0/font::res,
paper_length*72.0/font::res);
#endif
out.begin_comment("Orientation:")
.comment_arg(landscape_flag ? "Landscape" : "Portrait")
.end_comment();
if (ncopies != 1) {
out.end_line();
fprintf(out.get_file(), "%%%%Requirements: numcopies(%d)\n", ncopies);
}
out.simple_comment("EndComments");
out.simple_comment("BeginProlog");
rm.output_prolog(out);
if (!(broken_flags & NO_SETUP_SECTION)) {
out.simple_comment("EndProlog");
out.simple_comment("BeginSetup");
}
rm.document_setup(out);
out.put_symbol(dict_name).put_symbol("begin");
if (ndefs > 0)
ndefs += DEFS_DICT_SPARE;
out.put_literal_symbol(defs_dict_name)
.put_number(ndefs + 1)
.put_symbol("dict")
.put_symbol("def");
out.put_symbol(defs_dict_name)
.put_symbol("begin");
out.put_literal_symbol("u")
.put_delimiter('{')
.put_fix_number(1)
.put_symbol("mul")
.put_delimiter('}')
.put_symbol("bind")
.put_symbol("def");
defs += '\0';
out.special(defs.contents());
out.put_symbol("end");
if (ncopies != 1)
out.put_literal_symbol("#copies").put_number(ncopies).put_symbol("def");
out.put_literal_symbol("RES").put_number(res).put_symbol("def");
out.put_literal_symbol("PL");
if (guess_flag)
out.put_symbol("PLG");
else
out.put_fix_number(paper_length);
out.put_symbol("def");
out.put_literal_symbol("LS")
.put_symbol(landscape_flag ? "true" : "false")
.put_symbol("def");
encode_fonts();
out.simple_comment((broken_flags & NO_SETUP_SECTION)
? "EndProlog"
: "EndSetup");
out.end_line();
out.copy_file(tempfp);
fclose(tempfp);
}
void ps_printer::special(char *arg, const environment *env)
{
typedef void (ps_printer::*SPECIAL_PROCP)(char *, const environment *);
static struct {
const char *name;
SPECIAL_PROCP proc;
} proc_table[] = {
"exec", &ps_printer::do_exec,
"def", &ps_printer::do_def,
"mdef", &ps_printer::do_mdef,
"import", &ps_printer::do_import,
"file", &ps_printer::do_file,
"invis", &ps_printer::do_invis,
"endinvis", &ps_printer::do_endinvis,
};
for (char *p = arg; *p == ' ' || *p == '\n'; p++)
;
char *tag = p;
for (; *p != '\0' && *p != ':' && *p != ' ' && *p != '\n'; p++)
;
if (*p == '\0' || strncmp(tag, "ps", p - tag) != 0) {
error("X command without `ps:' tag ignored");
return;
}
p++;
for (; *p == ' ' || *p == '\n'; p++)
;
char *command = p;
for (; *p != '\0' && *p != ' ' && *p != '\n'; p++)
;
if (*command == '\0') {
error("X command without `ps:' tag ignored");
return;
}
for (int i = 0; i < sizeof(proc_table)/sizeof(proc_table[0]); i++)
if (strncmp(command, proc_table[i].name, p - command) == 0) {
(this->*(proc_table[i].proc))(p, env);
return;
}
error("X command `%1' not recognised", command);
}
// A conforming PostScript document must not have lines longer
// than 255 characters (excluding line termination characters).
static int check_line_lengths(const char *p)
{
for (;;) {
const char *end = strchr(p, '\n');
if (end == 0)
end = strchr(p, '\0');
if (end - p > 255)
return 0;
if (*end == '\0')
break;
p = end + 1;
}
return 1;
}
void ps_printer::do_exec(char *arg, const environment *env)
{
flush_sbuf();
while (csspace(*arg))
arg++;
if (*arg == '\0') {
error("missing argument to X exec command");
return;
}
if (!check_line_lengths(arg)) {
error("lines in X exec command must not be more than 255 characters long");
return;
}
out.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("EBEGIN")
.special(arg)
.put_symbol("EEND");
output_hpos = output_vpos = -1;
output_style.f = 0;
output_draw_point_size = -1;
output_line_thickness = -1;
ndefined_styles = 0;
if (!ndefs)
ndefs = 1;
}
void ps_printer::do_file(char *arg, const environment *env)
{
flush_sbuf();
while (csspace(*arg))
arg++;
if (*arg == '\0') {
error("missing argument to X file command");
return;
}
const char *filename = arg;
do {
++arg;
} while (*arg != '\0' && *arg != ' ' && *arg != '\n');
out.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("EBEGIN");
rm.import_file(filename, out);
out.put_symbol("EEND");
output_hpos = output_vpos = -1;
output_style.f = 0;
output_draw_point_size = -1;
output_line_thickness = -1;
ndefined_styles = 0;
if (!ndefs)
ndefs = 1;
}
void ps_printer::do_def(char *arg, const environment *)
{
flush_sbuf();
while (csspace(*arg))
arg++;
if (!check_line_lengths(arg)) {
error("lines in X def command must not be more than 255 characters long");
return;
}
defs += arg;
if (*arg != '\0' && strchr(arg, '\0')[-1] != '\n')
defs += '\n';
ndefs++;
}
// Like def, but the first argument says how many definitions it contains.
void ps_printer::do_mdef(char *arg, const environment *)
{
flush_sbuf();
char *p;
int n = (int)strtol(arg, &p, 10);
if (n == 0 && p == arg) {
error("first argument to X mdef must be an integer");
return;
}
if (n < 0) {
error("out of range argument `%1' to X mdef command", int(n));
return;
}
arg = p;
while (csspace(*arg))
arg++;
if (!check_line_lengths(arg)) {
error("lines in X mdef command must not be more than 255 characters long");
return;
}
defs += arg;
if (*arg != '\0' && strchr(arg, '\0')[-1] != '\n')
defs += '\n';
ndefs += n;
}
void ps_printer::do_import(char *arg, const environment *env)
{
flush_sbuf();
while (*arg == ' ' || *arg == '\n')
arg++;
for (char *p = arg; *p != '\0' && *p != ' ' && *p != '\n'; p++)
;
if (*p != '\0')
*p++ = '\0';
int parms[6];
int nparms = 0;
while (nparms < 6) {
char *end;
long n = strtol(p, &end, 10);
if (n == 0 && end == p)
break;
parms[nparms++] = int(n);
p = end;
}
if (csalpha(*p) && (p[1] == '\0' || p[1] == ' ' || p[1] == '\n')) {
error("scaling indicators not allowed in arguments for X import command");
return;
}
while (*p == ' ' || *p == '\n')
p++;
if (nparms < 5) {
if (*p == '\0')
error("too few arguments for X import command");
else
error("invalid argument `%1' for X import command", p);
return;
}
if (*p != '\0') {
error("superflous argument `%1' for X import command", p);
return;
}
int llx = parms[0];
int lly = parms[1];
int urx = parms[2];
int ury = parms[3];
int desired_width = parms[4];
int desired_height = parms[5];
if (desired_width <= 0) {
error("bad width argument `%1' for X import command: must be > 0",
desired_width);
return;
}
if (nparms == 6 && desired_height <= 0) {
error("bad height argument `%1' for X import command: must be > 0",
desired_height);
return;
}
if (llx == urx) {
error("llx and urx arguments for X import command must not be equal");
return;
}
if (lly == ury) {
error("lly and ury arguments for X import command must not be equal");
return;
}
if (nparms == 5) {
int old_wid = urx - llx;
int old_ht = ury - lly;
if (old_wid < 0)
old_wid = -old_wid;
if (old_ht < 0)
old_ht = -old_ht;
desired_height = int(desired_width*(double(old_ht)/double(old_wid)) + .5);
}
if (env->vpos - desired_height < 0)
warning("top of imported graphic is above the top of the page");
out.put_number(llx)
.put_number(lly)
.put_fix_number(desired_width)
.put_number(urx - llx)
.put_fix_number(-desired_height)
.put_number(ury - lly)
.put_fix_number(env->hpos)
.put_fix_number(env->vpos)
.put_symbol("PBEGIN");
rm.import_file(arg, out);
// do this here just in case application defines PEND
out.put_symbol("end");
out.put_symbol("PEND");
}
void ps_printer::do_invis(char *, const environment *)
{
invis_count++;
}
void ps_printer::do_endinvis(char *, const environment *)
{
if (invis_count == 0)
error("unbalanced `endinvis' command");
else
--invis_count;
}
printer *make_printer()
{
return new ps_printer;
}
static void usage();
int main(int argc, char **argv)
{
program_name = argv[0];
static char stderr_buf[BUFSIZ];
setbuf(stderr, stderr_buf);
int c;
while ((c = getopt(argc, argv, "F:glc:w:vb:")) != EOF)
switch(c) {
case 'v':
{
extern const char *version_string;
fprintf(stderr, "grops version %s\n", version_string);
fflush(stderr);
break;
}
case 'c':
if (sscanf(optarg, "%d", &ncopies) != 1 || ncopies <= 0) {
error("bad number of copies `%s'", optarg);
ncopies = 1;
}
break;
case 'g':
guess_flag = 1;
break;
case 'l':
landscape_flag = 1;
break;
case 'F':
font::command_line_font_dir(optarg);
break;
case 'w':
if (sscanf(optarg, "%d", &linewidth) != 1 || linewidth < 0) {
error("bad linewidth `%s'", optarg);
linewidth = -1;
}
break;
case 'b':
// XXX check this
broken_flags = atoi(optarg);
bflag = 1;
break;
case '?':
usage();
break;
default:
assert(0);
}
font::set_unknown_desc_command_handler(handle_unknown_desc_command);
if (optind >= argc)
do_file("-");
else {
for (int i = optind; i < argc; i++)
do_file(argv[i]);
}
delete pr;
exit(0);
}
static void usage()
{
fprintf(stderr, "usage: %s [-glv] [-b n] [-c n] [-w n] [-F dir] [files ...]\n",
program_name);
exit(1);
}