summaryrefslogtreecommitdiff
path: root/Master/bin/powerpc-linux/tpic2pdftex
blob: 70c1a33c7e82976ba3ff1632dbb6f6228de10749 (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
#!/bin/sh -
#
# $Id: tpic2pdftex,v 1.94 2007/01/14 19:05:32 hahe Exp $
#
# Experimental awk-script for conversion of tpic \specials as produced
# by (groff-)pic into pdfTeX \pdfliteral sections for further processing
# by pdftex.
#
# Usage:
#   $ pic -t somefile.pic | tpic2pdftex > somefile.tex
#
#   Process somefile.tex by pdftex/pdflatex.
#
# tpic \special desciption see e. g.:
#   Goossens, Rahtz, Mittelbach: The LaTeX Graphics Companion,
#   Addison-Wesley, 1997, pp. 464.
#
# Bugs:
#   Spline curve shapes not fully authentic (unknown algorithm).
#   Bounding box does not care for line thickness (groff pic feature).
#   Splines might be outside bounding box.
#
# Copyright (C) 2002--2004 by Hartmut Henkel
#
# This program 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 of the License, or (at
# your option) any later version.
#
# This program 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, write to the
# Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA  02111-1307  USA
#
# The author may be contacted via the e-mail address
#
#         hartmut_henkel@gmx.de
#
# NEWS:
#   14 Jan. 2007 - make it executable shell script, calling awk
#   16 Dec. 2004 - Replaced // {print} by {print} (some AWKs did choke)
#   09 Apr. 2004 - Locale check: Decimal point in float numbers?
#   30 Oct. 2003 - Replaced print statements by printf to avoid
#   underflow numbers like 1e-14 in \pdfliterals. Remove trailing
#   zeroes of floating point numbers.
#   02 May  2003 - Lines starting with \ allow TeX insertions,
#   e. g. of pdfTeX \pdfliteral{}
#   29 Apr. 2003 - Changed for pic of groff 1.19
#   16 Mar. 2003 - Bug corrected: Dashed lines shorter than minimum
#   dash-pause length now drawn solid.
#   11 Nov. 2002 - Spline drawing improved: First half of first and last
#   half of last spline segments are drawn by straight lines.
#   28 Nov. 2002 - Arc and circle drawing cleaned up. Full circle is now
#   drawn by 4 Bezier curves, as is common use. Arcs split evenly into
#   Bezier curves, to minimize max. error.
#   02 Dec. 2002 - Experimental pic (groff > 1.18.1) with improved
#   vertical picture positioning supported.
#   04 Dec. 2002 - Experiment with modified pic (\vtop -> \vbox),
#   Formula for Bezier constant c reduced.
#
########################################################################

AWK=${AWK:-gawk}
export LANG="C"

AWKPROG='
# begin of awk input file

function qprintf(a) {
  gsub(/0* /," ", a);   # trailing zeroes in %f
  gsub(/\. /," ", a);   # orphaned decimal dots
  gsub(/0*]/,"]", a);   # trailing zeroes in brackets
  gsub(/0X/,"0", a);    # guard integer zeroes
  gsub(/-0 /,"0 ", a);  # correct -0 to 0
  print a;
}

function startpdfliteral() {
  if (pdfliteral == 0) {
    print "\\pdfliteral{";
    printf("q [] 0 d %d J %d j\n", linecap, linejoin);   # no qprintf!
    qprintf(sprintf("%f w", linethickness * wscale));
  }
  pdfliteral = 1;
}

function stoppdfliteral() {
  if (pdfliteral == 1) {
    print "Q";
    print "}%";
  }
  pdfliteral = 0;
}

########################################################################

BEGIN{
  wscale = 72.0 / 1000;
  tpicmode = 0;
  pdfliteral = 0;
  pointbuf = 0;
  filled = 0;
  fillval = 0;
  linecap = 1;
  linejoin = 1;
  defaultlinethickness = 8;
  drawarc = 0;
  pi = atan2(0, -1);
  if (match(sprintf("%f", 0.5), /\./) == 0) {
    print "ERROR: Floating point numbers miss decimal point. Do"
    print "  export LANG=\"C\""
    print "before calling awk."
    print "ERROR: Floating point numbers miss decimal point. Do" > "/dev/stderr"
    print "  export LANG=\"C\"" > "/dev/stderr"
    print "before calling awk." > "/dev/stderr"
    exit 1;
  }
}

########################################################################

# the following expression triggers tpic processing for pic <= 1.18.1

/^\\setbox\\graph=\\vtop{/ {
  pdfliteral = 0;
  tpicmode = 1;
  linethickness = defaultlinethickness;
}

# the following expression triggers tpic processing for pic = 1.19

/^\\expandafter\\setbox\\csname graph\\endcsname/ {
  pdfliteral = 0;
  tpicmode = 1;
  linethickness = defaultlinethickness;
}

# TeX parts end \pdfliteral, and also TeX parts embedded in .PS ... .PE
# section end \pdfliteral

/^  *\\graphtemp|^  *\\rlap|^  *\\advance|^\\|^  *\\hbox/ {
  if(tpicmode == 1)
    stoppdfliteral();
}

/^}%/ {
  if(tpicmode == 1)
    tpicmode = 0;
}

########################################################################

# all specials handling

/^  *\\special/ {
  if(tpicmode == 1)
    startpdfliteral();
}

# <pn> set pen size

/^  *\\special{pn/ {
  gsub(/[{}]/, " ");
  linethickness = $3 + 0;
  qprintf(sprintf("%f w", linethickness * wscale));
  next;
}

# <pa> add point to path

/^  *\\special{pa/ {
  gsub(/[{}]/, " ");
  x[pointbuf] = $3 + 0;
  y[pointbuf] = $4 + 0;
  pointbuf++;
  next;
}

# <fp> print path as straight lines

/^  *\\special{fp/ {
  if (filled == 1)
    qprintf(sprintf("q %f g", 1 - fillval));
  qprintf(sprintf("%f %f m", x[0] * wscale, -y[0] * wscale));
  for (i = 1; i < pointbuf; i++)
    qprintf(sprintf("%f %f l", x[i] * wscale, -y[i] * wscale));
  if (filled == 1)
    print "B Q";
  else
    print "S";
  pointbuf = 0;
  filled = 0;
  next;
}

# <da> print path as straight dashed lines

/^  *\\special{da/ {
  gsub(/[{}]/, " ");
  don = ($3 + 0) * 1000;
  if (filled == 1) {
    qprintf(sprintf("q %f g", 1 - fillval));
    qprintf(sprintf("%f %f m", x[0] * wscale, -y[0] * wscale));
    for (i = 1; i < pointbuf; i++)
      qprintf(sprintf("%f %f l", x[i] * wscale, -y[i] * wscale));
    print "f Q";
  }
  for (i = 1; i < pointbuf; i++) {
    dx = x[i] - x[i - 1];
    dy = y[i] - y[i - 1];
    len = sqrt(dx * dx + dy * dy);
    non = int(0.5 * len / don + 0.75);
    noff = non - 1;
    lon = don * non;
    loff = len - lon;
    if(noff > 0) {
      doff = loff / noff;
      qprintf(sprintf("q [%f %f] 0X d", don * wscale, doff * wscale));
    } else {
      print "q [] 0 d";
    }
    qprintf(sprintf("%f %f m", x[i - 1] * wscale, -y[i - 1] * wscale));
    qprintf(sprintf("%f %f l", x[i] * wscale, -y[i] * wscale));
    print "S Q";
  }
  pointbuf = 0;
  filled = 0;
  next;
}

# <dt> print path as straight dotted lines

/^  *\\special{dt/ {
  gsub(/[{}]/, " ");
  dt = ($3 + 0) * 1000;
  if (filled == 1) {
    qprintf(sprintf("q %f g", 1 - fillval));
    qprintf(sprintf("%f %f m", x[0] * wscale, -y[0] * wscale));
    for (i = 1; i < pointbuf; i++)
      qprintf(sprintf("%f %f l", x[i] * wscale, -y[i] * wscale));
    print "f Q";
  }
  for (i = 1; i < pointbuf; i++) {
    dx = x[i] - x[i - 1];
    dy = y[i] - y[i - 1];
    len = sqrt(dx * dx + dy * dy);
    dl = int (len / dt + 0.5);
    if (!dl)
      dtl = len;
    else
      dtl = len / dl;
    qprintf(sprintf("q [0X %f] 0X d", dtl * wscale));
    qprintf(sprintf("%f %f m", x[i - 1] * wscale, -y[i - 1] * wscale));
    qprintf(sprintf("%f %f l", x[i] * wscale, -y[i] * wscale));
    print "S Q";
  }
  pointbuf = 0;
  filled = 0;
  next;
}

# <ip> like <fp>, but path actually not drawn

/^  *\\special{ip/ {
  if (filled == 1)
    qprintf(sprintf("q %f g", 1 - fillval));
  qprintf(sprintf("%f %f m", x[0] * wscale, -y[0] * wscale));
  for (i = 1; i < pointbuf; i++)
    qprintf(sprintf("%f %f l", x[i] * wscale, -y[i] * wscale));
  if (filled == 1)
    print "f Q";
  else
    print "f";
  pointbuf = 0;
  filled = 0;
  next;
}

# <sp> like <fp>, but path printed as splines

/^  *\\special{sp/ {
  gsub(/[{}]/, " ");
  don = ($3 + 0) * 1000;
  a = 0.68; # fudge, visually optimized
  x[pointbuf] = x[pointbuf - 1];
  y[pointbuf] = y[pointbuf - 1];

  if (don > 0)
    qprintf(sprintf("q [%f] 0X d", don * wscale));
  if (don < 0)
    qprintf(sprintf("q [0X %f] 0X d", -don * wscale));

  qprintf(sprintf("%f %f m", x[0] * wscale, -y[0] * wscale));

  if(pointbuf < 3)
    qprintf(sprintf("%f %f l", x[pointbuf - 1] * wscale, -y[pointbuf - 1] * wscale));
  else {
    qprintf(sprintf("%f %f l", 0.5 * (x[0] + x[1]) * wscale, \
     -0.5 * (y[0] + y[1]) * wscale)); # start straight, see cstr116.ps
    for (i = 1; i < pointbuf - 1; i++)
      qprintf(sprintf("%f %f %f %f %f %f c", \
        (a * x[i] + (1 - a) * 0.5 * (x[i] + x[i - 1])) * wscale, \
       -(a * y[i] + (1 - a) * 0.5 * (y[i] + y[i - 1])) * wscale, \
        (a * x[i] + (1 - a) * 0.5 * (x[i] + x[i + 1])) * wscale, \
       -(a * y[i] + (1 - a) * 0.5 * (y[i] + y[i + 1])) * wscale, \
        0.5 * (x[i] + x[i + 1]) * wscale, -0.5 * (y[i] + y[i + 1]) * wscale));
    qprintf(sprintf("%f %f l", x[pointbuf - 1] * wscale, -y[pointbuf - 1] * wscale));
  }
  if (filled == 1) {
    qprintf(sprintf("q %f g", 1 - fillval));
    print "B Q";
  }
  else
    print "S";
  if (don != 0)
    print "Q";
  pointbuf = 0;
  filled = 0;
  next;
}

# <sh> prepare shading of object interior

/^  *\\special{sh/ {
  gsub(/[{}]/, " ");
  fillval = $3 + 0;
  filled = 1;
  next;
}

# <ar> draw arc
# <ia> like <ar>, but arc actually not drawn

/^  *\\special{ar/ {
  drawarc = 1;
}

/^  *\\special{ar|^  *\\special{ia/ {
  gsub(/[{}]/, " ");
  xc = $3 + 0;
  yc = $4 + 0;
  rx = $5 + 0;
  ry = $6 + 0;
  s = $7 + 0;
  e = $8 + 0;
  if (e - s > 2 * pi) e = s + 2 * pi;
  if (s - e > 2 * pi) e = s - 2 * pi;
  curvespercircle = 4; # max. number Bezier curves per circle
  phi_max = 1.001 * 2 * pi / curvespercircle;
  if (e > s)
    imax = int ((e - s) / phi_max) + 1;
  else
    imax = int ((s - e) / phi_max) + 1;
  phi = (e - s) / imax;

  # parameter for Bezier control vectors, c(90 deg.) = 0.55228...:
  c = 4 * (1 - cos(0.5 * phi)) / (3 * sin(0.5 * phi));

  x0 = rx * cos(s) + xc;
  y0 = ry * sin(s) + yc;
  qprintf(sprintf("%f %f m", x0 * wscale, -y0 * wscale));
  for (i = 0; i < imax; i++) {
    x1 = x0 - rx * c * sin(s + i * phi);
    y1 = y0 + ry * c * cos(s + i * phi);
    x3 = rx * cos(s + (i + 1) * phi) + xc;
    y3 = ry * sin(s + (i + 1) * phi) + yc;
    x2 = x3 + rx * c * sin(s + (i + 1) * phi);
    y2 = y3 - ry * c * cos(s + (i + 1) * phi);
    qprintf(sprintf("%f %f %f %f %f %f c", x1 * wscale, -y1 * wscale, \
      x2 * wscale, -y2 * wscale, x3 * wscale, -y3 * wscale));
    x0 = x3;
    y0 = y3;
  }
  if(drawarc == 1) {
    if (filled == 1) {
      qprintf(sprintf("h q %f g", 1 - fillval));
      print "B Q";
    }
    else
      print "S";
  } else {
    if (filled == 1) {
      qprintf(sprintf("h q %f g", 1 - fillval));
      print "f Q";
    }
    else
      print "f";
  }
  filled = 0;
  drawarc = 0;
  next;
}

########################################################################

{print}

########################################################################
'
# end of awk input file

$AWK "$AWKPROG" "$@"