summaryrefslogtreecommitdiffstats
path: root/src/devices/grolj4/lj4.cpp
blob: a429a7d061cf446316604069f12417d6b87008fc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
/* Copyright (C) 1994-2020 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 3 of the License, 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 this program.  If not, see <http://www.gnu.org/licenses/>. */

/*
TODO

option to use beziers for circle/ellipse/arc
option to use lines for spline (for LJ3)
left/top offset registration
output bin selection option
paper source option
output non-integer parameters using fixed point numbers
X command to insert contents of file
X command to specify inline escape sequence (how to specify unprintable chars?)
X command to include bitmap graphics
*/

#include <assert.h>

#include "driver.h"
#include "nonposix.h"

extern "C" const char *Version_string;

static struct {
  const char *name;
  int code;
  // at 300dpi
  int x_offset_portrait;
  int x_offset_landscape;
} paper_table[] = {
  { "letter", 2, 75, 60 },
  { "legal", 3, 75, 60 },
  { "executive", 1, 75, 60 },
  { "a4", 26, 71, 59 },
  { "com10", 81, 75, 60 },
  { "monarch", 80, 75, 60 },
  { "c5", 91, 71, 59 },
  { "b5", 100, 71, 59 },
  { "dl", 90, 71, 59 },
};

static int user_paper_size = -1;
static int landscape_flag = 0;
static int duplex_flag = 0;

// An upper limit on the paper dimensions in centipoints,
// used for setting HPGL picture frame.
#define MAX_PAPER_WIDTH (12*720)
#define MAX_PAPER_HEIGHT (17*720)

// Dotted lines that are thinner than this don't work right.
#define MIN_DOT_PEN_WIDTH .351

#ifndef DEFAULT_LINE_WIDTH_FACTOR
// in ems/1000
#define DEFAULT_LINE_WIDTH_FACTOR 40
#endif

const int DEFAULT_HPGL_UNITS = 1016;
int line_width_factor = DEFAULT_LINE_WIDTH_FACTOR;
unsigned ncopies = 0;		// 0 means don't send ncopies command

static int lookup_paper_size(const char *);

class lj4_font : public font {
public:
  ~lj4_font();
  void handle_unknown_font_command(const char *command, const char *arg,
				   const char *filename, int lineno);
  static lj4_font *load_lj4_font(const char *);
  int weight;
  int style;
  int proportional;
  int typeface;
private:
  lj4_font(const char *);
};

lj4_font::lj4_font(const char *nm)
: font(nm), weight(0), style(0), proportional(0), typeface(0)
{
}

lj4_font::~lj4_font()
{
}

lj4_font *lj4_font::load_lj4_font(const char *s)
{
  lj4_font *f = new lj4_font(s);
  if (!f->load()) {
    delete f;
    return 0;
  }
  return f;
}

static struct {
  const char *s;
  int lj4_font::*ptr;
  int min;
  int max;
} command_table[] = {
  { "pclweight", &lj4_font::weight, -7, 7 },
  { "pclstyle", &lj4_font::style, 0, 32767 },
  { "pclproportional", &lj4_font::proportional, 0, 1 },
  { "pcltypeface", &lj4_font::typeface, 0, 65535 },
};

void lj4_font::handle_unknown_font_command(const char *command,
					   const char *arg,
					   const char *filename, int lineno)
{
  for (unsigned int i = 0;
       i < sizeof(command_table)/sizeof(command_table[0]); i++) {
    if (strcmp(command, command_table[i].s) == 0) {
      if (arg == 0)
	fatal_with_file_and_line(filename, lineno,
				 "'%1' command requires an argument",
				 command);
      char *ptr;
      long n = strtol(arg, &ptr, 10);
      if (n == 0 && ptr == arg)
	fatal_with_file_and_line(filename, lineno,
				 "'%1' command requires numeric argument",
				 command);
      if (n < command_table[i].min) {
	error_with_file_and_line(filename, lineno,
				 "argument for '%1' command must not be less than %2",
				 command, command_table[i].min);
	n = command_table[i].min;
      }
      else if (n > command_table[i].max) {
	error_with_file_and_line(filename, lineno,
				 "argument for '%1' command must not be greater than %2",
				 command, command_table[i].max);
	n = command_table[i].max;
      }
      this->*command_table[i].ptr = int(n);
      break;
    }
  }
}

class lj4_printer : public printer {
public:
  lj4_printer(int);
  ~lj4_printer();
  void set_char(glyph *, font *, const environment *, int, const char *name);
  void draw(int code, int *p, int np, const environment *env);
  void begin_page(int);
  void end_page(int page_length);
  font *make_font(const char *);
  void end_of_line();
private:
  void set_line_thickness(int size, int dot = 0);
  void hpgl_init();
  void hpgl_start();
  void hpgl_end();
  int moveto(int hpos, int vpos);
  int moveto1(int hpos, int vpos);

  int cur_hpos;
  int cur_vpos;
  lj4_font *cur_font;
  int cur_size;
  unsigned short cur_symbol_set;
  int x_offset;
  int line_thickness;
  double pen_width;
  double hpgl_scale;
  int hpgl_inited;
  int paper_size;
};

inline
int lj4_printer::moveto(int hpos, int vpos)
{
  if (cur_hpos != hpos || cur_vpos != vpos || cur_hpos < 0)
    return moveto1(hpos, vpos);
  else
    return 1;
}

inline
void lj4_printer::hpgl_start()
{
  fputs("\033%1B", stdout);
}

inline
void lj4_printer::hpgl_end()
{
  fputs(";\033%0A", stdout);
}

lj4_printer::lj4_printer(int ps)
: cur_hpos(-1),
  cur_font(0),
  cur_size(0),
  cur_symbol_set(0),
  line_thickness(-1),
  pen_width(-1.0),
  hpgl_inited(0)
{
  if (7200 % font::res != 0)
    fatal("invalid resolution %1: resolution must be a factor of 7200",
	  font::res);
  fputs("\033E", stdout);		// reset
  if (font::res != 300)
    printf("\033&u%dD", font::res);	// unit of measure
  if (ncopies > 0)
    printf("\033&l%uX", ncopies);
  paper_size = 0;		// default to letter
  if (font::papersize) {
    int n = lookup_paper_size(font::papersize);
    if (n < 0)
      error("ignoring invalid paper format '%1'", font::papersize);
    else
      paper_size = n;
  }
  if (ps >= 0)
    paper_size = ps;
  printf("\033&l%dA"		// paper format
	 "\033&l%dO"		// orientation
	 "\033&l0E",		// no top margin
	 paper_table[paper_size].code,
	 landscape_flag != 0);
  if (landscape_flag)
    x_offset = paper_table[paper_size].x_offset_landscape;
  else
    x_offset = paper_table[paper_size].x_offset_portrait;
  x_offset = (x_offset * font::res) / 300;
  if (duplex_flag)
     printf("\033&l%dS", duplex_flag);
}

lj4_printer::~lj4_printer()
{
  fputs("\033E", stdout);
}

void lj4_printer::begin_page(int)
{
}

void lj4_printer::end_page(int)
{
  putchar('\f');
  cur_hpos = -1;
}

void lj4_printer::end_of_line()
{
  cur_hpos = -1;		// force absolute motion
}

inline
int is_unprintable(unsigned char c)
{
  return c < 32 && (c == 0 || (7 <= c && c <= 15) || c == 27);
}

void lj4_printer::set_char(glyph *g, font *f, const environment *env,
			   int w, const char *)
{
  int code = f->get_code(g);

  unsigned char ch = code & 0xff;
  unsigned short symbol_set = code >> 8;
  if (symbol_set != cur_symbol_set) {
    printf("\033(%d%c", symbol_set/32, (symbol_set & 31) + 64);
    cur_symbol_set = symbol_set;
  }
  if (f != cur_font) {
    lj4_font *psf = (lj4_font *)f;
    // FIXME only output those that are needed
    printf("\033(s%dp%ds%db%dT",
	   psf->proportional,
	   psf->style,
	   psf->weight,
	   psf->typeface);
    if (!psf->proportional || !cur_font || !cur_font->proportional)
      cur_size = 0;
    cur_font = psf;
  }
  if (env->size != cur_size) {
    if (cur_font->proportional) {
      static const char *quarters[] = { "", ".25", ".5", ".75" };
      printf("\033(s%d%sV", env->size/4, quarters[env->size & 3]);
    }
    else {
      double pitch = double(font::res)/w;
      // PCL uses the next largest pitch, so round it down.
      pitch = floor(pitch*100.0)/100.0;
      printf("\033(s%.2fH", pitch);
    }
    cur_size = env->size;
  }
  if (!moveto(env->hpos, env->vpos))
    return;
  if (is_unprintable(ch))
    fputs("\033&p1X", stdout);
  putchar(ch);
  cur_hpos += w;
}

int lj4_printer::moveto1(int hpos, int vpos)
{
  if (hpos < x_offset || vpos < 0)
    return 0;
  fputs("\033*p", stdout);
  if (cur_hpos < 0)
    printf("%dx%dY", hpos - x_offset, vpos);
  else {
    if (cur_hpos != hpos)
      printf("%s%d%c", hpos > cur_hpos ? "+" : "",
	     hpos - cur_hpos, vpos == cur_vpos ? 'X' : 'x');
    if (cur_vpos != vpos)
      printf("%s%dY", vpos > cur_vpos ? "+" : "", vpos - cur_vpos);
  }
  cur_hpos = hpos;
  cur_vpos = vpos;
  return 1;
}

void lj4_printer::draw(int code, int *p, int np, const environment *env)
{
  switch (code) {
  case 'R':
    {
      if (np != 2) {
	error("2 arguments required for rule");
	break;
      }
      int hpos = env->hpos;
      int vpos = env->vpos;
      int hsize = p[0];
      int vsize = p[1];
      if (hsize < 0) {
	hpos += hsize;
	hsize = -hsize;
      }
      if (vsize < 0) {
	vpos += vsize;
	vsize = -vsize;
      }
      if (!moveto(hpos, vpos))
	return;
      printf("\033*c%da%db0P", hsize, vsize);
      break;
    }
  case 'l':
    if (np != 2) {
      error("2 arguments required for line");
      break;
    }
    hpgl_init();
    if (!moveto(env->hpos, env->vpos))
      return;
    hpgl_start();
    set_line_thickness(env->size, p[0] == 0 && p[1] == 0);
    printf("PD%d,%d", p[0], p[1]);
    hpgl_end();
    break;
  case 'p':
  case 'P':
    {
      if (np & 1) {
	error("even number of arguments required for polygon");
	break;
      }
      if (np == 0) {
	error("no arguments for polygon");
	break;
      }
      hpgl_init();
      if (!moveto(env->hpos, env->vpos))
	return;
      hpgl_start();
      if (code == 'p')
	set_line_thickness(env->size);
      printf("PMPD%d", p[0]);
      for (int i = 1; i < np; i++)
	printf(",%d", p[i]);
      printf("PM2%cP", code == 'p' ? 'E' : 'F');
      hpgl_end();
      break;
    }
  case '~':
    {
      if (np & 1) {
	error("even number of arguments required for spline");
	break;
      }
      if (np == 0) {
	error("no arguments for spline");
	break;
      }
      hpgl_init();
      if (!moveto(env->hpos, env->vpos))
	return;
      hpgl_start();
      set_line_thickness(env->size);
      printf("PD%d,%d", p[0]/2, p[1]/2);
      const int tnum = 2;
      const int tden = 3;
      if (np > 2) {
	fputs("BR", stdout);
	for (int i = 0; i < np - 2; i += 2) {
	  if (i != 0)
	    putchar(',');
	  printf("%d,%d,%d,%d,%d,%d",
		 (p[i]*tnum)/(2*tden),
		 (p[i + 1]*tnum)/(2*tden),
		 p[i]/2 + (p[i + 2]*(tden - tnum))/(2*tden),
		 p[i + 1]/2 + (p[i + 3]*(tden - tnum))/(2*tden),
		 (p[i] - p[i]/2) + p[i + 2]/2,
		 (p[i + 1] - p[i + 1]/2) + p[i + 3]/2);
	}
      }
      printf("PR%d,%d", p[np - 2] - p[np - 2]/2, p[np - 1] - p[np - 1]/2);
      hpgl_end();
      break;
    }
  case 'c':
  case 'C':
    // troff adds an extra argument to C
    if (np != 1 && !(code == 'C' && np == 2)) {
      error("1 argument required for circle");
      break;
    }
    hpgl_init();
    if (!moveto(env->hpos + p[0]/2, env->vpos))
      return;
    hpgl_start();
    if (code == 'c') {
      set_line_thickness(env->size);
      printf("CI%d", p[0]/2);
    }
    else
      printf("WG%d,0,360", p[0]/2);
    hpgl_end();
    break;
  case 'e':
  case 'E':
    if (np != 2) {
      error("2 arguments required for ellipse");
      break;
    }
    hpgl_init();
    if (!moveto(env->hpos + p[0]/2, env->vpos))
      return;
    hpgl_start();
    printf("SC0,%.4f,0,-%.4f,2", hpgl_scale * double(p[0])/p[1], hpgl_scale);
    if (code == 'e') {
      set_line_thickness(env->size);
      printf("CI%d", p[1]/2);
    }
    else
      printf("WG%d,0,360", p[1]/2);
    printf("SC0,%.4f,0,-%.4f,2", hpgl_scale, hpgl_scale);
    hpgl_end();
    break;
  case 'a':
    {
      if (np != 4) {
	error("4 arguments required for arc");
	break;
      }
      hpgl_init();
      if (!moveto(env->hpos, env->vpos))
	return;
      hpgl_start();
      set_line_thickness(env->size);
      double c[2];
      if (adjust_arc_center(p, c)) {
	double sweep = ((atan2(p[1] + p[3] - c[1], p[0] + p[2] - c[0])
			 - atan2(-c[1], -c[0]))
			* 180.0/PI);
	if (sweep > 0.0)
	  sweep -= 360.0;
	printf("PDAR%d,%d,%f", int(c[0]), int(c[1]), sweep);
      }
      else
	printf("PD%d,%d", p[0] + p[2], p[1] + p[3]);
      hpgl_end();
    }
    break;
  case 'f':
    if (np != 1 && np != 2) {
      error("1 argument required for fill");
      break;
    }
    hpgl_init();
    hpgl_start();
    if (p[0] >= 0 && p[0] <= 1000)
      printf("FT10,%d", p[0]/10);
    hpgl_end();
    break;
  case 'F':
    // not implemented yet
    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;
    }
  default:
    error("unrecognised drawing command '%1'", char(code));
    break;
  }
}

void lj4_printer::hpgl_init()
{
  if (hpgl_inited)
    return;
  hpgl_inited = 1;
  hpgl_scale = double(DEFAULT_HPGL_UNITS)/font::res;
  printf("\033&f0S"		// push position
	 "\033*p0x0Y"		// move to 0,0
	 "\033*c%dx%dy0T"	// establish picture frame
	 "\033%%1B"		// switch to HPGL
	 "SP1SC0,%.4f,0,-%.4f,2IR0,100,0,100" // set up scaling
	 "LA1,4,2,4"		// round line ends and joins
	 "PR"			// relative plotting
	 "TR0"			// opaque
	 ";\033%%1A"		// back to PCL
	 "\033&f1S",		// pop position
	 MAX_PAPER_WIDTH, MAX_PAPER_HEIGHT,
	 hpgl_scale, hpgl_scale);
}

void lj4_printer::set_line_thickness(int size, int dot)
{
  double pw;
  if (line_thickness < 0)
    pw = (size * (line_width_factor * 25.4))/(font::sizescale * 72000.0);
  else
    pw = line_thickness*25.4/font::res;
  if (dot && pw < MIN_DOT_PEN_WIDTH)
    pw = MIN_DOT_PEN_WIDTH;
  if (pw != pen_width) {
    printf("PW%f", pw);
    pen_width = pw;
  }
}

font *lj4_printer::make_font(const char *nm)
{
  return lj4_font::load_lj4_font(nm);
}

printer *make_printer()
{
  return new lj4_printer(user_paper_size);
}

static
int lookup_paper_size(const char *s)
{
  for (unsigned int i = 0;
       i < sizeof(paper_table)/sizeof(paper_table[0]); i++) {
    // FIXME Perhaps allow unique prefix.
    if (strcasecmp(s, paper_table[i].name) == 0)
      return i;
  }
  return -1;
}

static void usage(FILE *stream);

extern "C" int optopt, optind;

int main(int argc, char **argv)
{
  setlocale(LC_NUMERIC, "C");
  program_name = argv[0];
  static char stderr_buf[BUFSIZ];
  setbuf(stderr, stderr_buf);
  int c;
  static const struct option long_options[] = {
    { "help", no_argument, 0, CHAR_MAX + 1 },
    { "version", no_argument, 0, 'v' },
    { NULL, 0, 0, 0 }
  };
  while ((c = getopt_long(argc, argv, "c:d:F:I:lp:vw:", long_options, NULL))
	 != EOF)
    switch(c) {
    case 'l':
      landscape_flag = 1;
      break;
    case 'I':
      // ignore include search path
      break;
    case ':':
      if (optopt == 'd') {
	fprintf(stderr, "duplex assumed to be long-side\n");
	duplex_flag = 1;
      } else
	fprintf(stderr, "option -%c requires an argument\n", optopt);
      fflush(stderr);
      break;
    case 'd':
      if (!isdigit(*optarg))	// this ugly hack prevents -d without
	optind--;		//  args from messing up the arg list
      duplex_flag = atoi(optarg);
      if (duplex_flag != 1 && duplex_flag != 2) {
	fprintf(stderr, "odd value for duplex; assumed to be long-side\n");
	duplex_flag = 1;
      }
      break;
    case 'p':
      {
	int n = lookup_paper_size(optarg);
	if (n < 0)
	  error("ignoring invalid paper format '%1'", font::papersize);
	else
	  user_paper_size = n;
	break;
      }
    case 'v':
      printf("GNU grolj4 (groff) version %s\n", Version_string);
      exit(0);
      break;
    case 'F':
      font::command_line_font_dir(optarg);
      break;
    case 'c':
      {
	char *ptr;
	long n = strtol(optarg, &ptr, 10);
	if (n == 0 && ptr == optarg)
	  error("argument for -c must be a positive integer");
	else if (n <= 0 || n > 32767)
	  error("out of range argument for -c");
	else
	  ncopies = unsigned(n);
	break;
      }
    case 'w':
      {
	char *ptr;
	long n = strtol(optarg, &ptr, 10);
	if (n == 0 && ptr == optarg)
	  error("argument for -w must be a non-negative integer");
	else if (n < 0 || n > INT_MAX)
	  error("out of range argument for -w");
	else
	  line_width_factor = int(n);
	break;
      }
    case CHAR_MAX + 1: // --help
      usage(stdout);
      exit(0);
      break;
    case '?':
      usage(stderr);
      exit(1);
      break;
    default:
      assert(0);
    }
  SET_BINARY(fileno(stdout));
  if (optind >= argc)
    do_file("-");
  else {
    for (int i = optind; i < argc; i++)
      do_file(argv[i]);
  }
  return 0;
}

static void usage(FILE *stream)
{
  fprintf(stream,
	  "usage: %s [-l] [-c n] [-d [n]] [-F dir] [-p paper-format]"
	  " [-w n] [file ...]\n"
	  "usage: %s {-v | --version}\n"
	  "usage: %s --help\n",
	  program_name, program_name, program_name);
}

// Local Variables:
// fill-column: 72
// mode: C++
// End:
// vim: set cindent noexpandtab shiftwidth=2 textwidth=72: