2 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by James Clark (jjc@jclark.com)
6 This file is part of groff.
8 groff is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with groff; see the file COPYING. If not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 const double RELATIVE_THICKNESS = -1.0;
27 const double BAD_THICKNESS = -2.0;
29 class simple_output : public common_output {
30 virtual void simple_line(const position &, const position &) = 0;
31 virtual void simple_spline(const position &, const position *, int n) = 0;
32 virtual void simple_arc(const position &, const position &,
33 const position &) = 0;
34 virtual void simple_circle(int, const position &, double rad) = 0;
35 virtual void simple_ellipse(int, const position &, const distance &) = 0;
36 virtual void simple_polygon(int, const position *, int) = 0;
37 virtual void line_thickness(double) = 0;
38 virtual void set_fill(double) = 0;
39 virtual void set_color(char *, char *) = 0;
40 virtual void reset_color() = 0;
41 virtual char *get_last_filled() = 0;
42 void dot(const position &, const line_type &) = 0;
44 void start_picture(double sc, const position &ll, const position &ur) = 0;
45 void finish_picture() = 0;
46 void text(const position &, text_piece *, int, double) = 0;
47 void line(const position &, const position *, int n,
49 void polygon(const position *, int n,
50 const line_type &, double);
51 void spline(const position &, const position *, int n,
53 void arc(const position &, const position &, const position &,
55 void circle(const position &, double rad, const line_type &, double);
56 void ellipse(const position &, const distance &, const line_type &, double);
57 int supports_filled_polygons();
60 int simple_output::supports_filled_polygons()
62 return driver_extension_flag != 0;
65 void simple_output::arc(const position &start, const position ¢,
66 const position &end, const line_type <)
69 case line_type::solid:
70 line_thickness(lt.thickness);
71 simple_arc(start, cent, end);
73 case line_type::invisible:
75 case line_type::dashed:
76 dashed_arc(start, cent, end, lt);
78 case line_type::dotted:
79 dotted_arc(start, cent, end, lt);
84 void simple_output::line(const position &start, const position *v, int n,
88 line_thickness(lt.thickness);
89 for (int i = 0; i < n; i++) {
91 case line_type::solid:
92 simple_line(pos, v[i]);
94 case line_type::dotted:
96 distance vec(v[i] - pos);
97 double dist = hypot(vec);
98 int ndots = int(dist/lt.dash_width + .5);
102 vec /= double(ndots);
103 for (int j = 0; j <= ndots; j++)
104 dot(pos + vec*j, lt);
108 case line_type::dashed:
110 distance vec(v[i] - pos);
111 double dist = hypot(vec);
112 if (dist <= lt.dash_width*2.0)
113 simple_line(pos, v[i]);
115 int ndashes = int((dist - lt.dash_width)/(lt.dash_width*2.0) + .5);
116 distance dash_vec = vec*(lt.dash_width/dist);
117 double dash_gap = (dist - lt.dash_width)/ndashes;
118 distance dash_gap_vec = vec*(dash_gap/dist);
119 for (int j = 0; j <= ndashes; j++) {
120 position s(pos + dash_gap_vec*j);
121 simple_line(s, s + dash_vec);
126 case line_type::invisible:
135 void simple_output::spline(const position &start, const position *v, int n,
138 line_thickness(lt.thickness);
139 simple_spline(start, v, n);
142 void simple_output::polygon(const position *v, int n,
143 const line_type <, double fill)
145 if (driver_extension_flag && ((fill >= 0.0) || (get_last_filled() != 0))) {
146 if (get_last_filled() == 0)
148 simple_polygon(1, v, n);
150 if (lt.type == line_type::solid && driver_extension_flag) {
151 line_thickness(lt.thickness);
152 simple_polygon(0, v, n);
154 else if (lt.type != line_type::invisible) {
155 line_thickness(lt.thickness);
156 line(v[n - 1], v, n, lt);
160 void simple_output::circle(const position ¢, double rad,
161 const line_type <, double fill)
163 if (driver_extension_flag && ((fill >= 0.0) || (get_last_filled() != 0))) {
164 if (get_last_filled() == 0)
166 simple_circle(1, cent, rad);
168 line_thickness(lt.thickness);
170 case line_type::invisible:
172 case line_type::dashed:
173 dashed_circle(cent, rad, lt);
175 case line_type::dotted:
176 dotted_circle(cent, rad, lt);
178 case line_type::solid:
179 simple_circle(0, cent, rad);
186 void simple_output::ellipse(const position ¢, const distance &dim,
187 const line_type <, double fill)
189 if (driver_extension_flag && ((fill >= 0.0) || (get_last_filled() != 0))) {
190 if (get_last_filled() == 0)
192 simple_ellipse(1, cent, dim);
194 if (lt.type != line_type::invisible)
195 line_thickness(lt.thickness);
197 case line_type::invisible:
199 case line_type::dotted:
200 case line_type::dashed:
201 case line_type::solid:
202 simple_ellipse(0, cent, dim);
209 class troff_output : public simple_output {
210 const char *last_filename;
214 double last_line_thickness;
216 char *last_filled; // color
217 char *last_outlined; // color
221 void start_picture(double, const position &ll, const position &ur);
222 void finish_picture();
223 void text(const position &, text_piece *, int, double);
224 void dot(const position &, const line_type &);
225 void command(const char *, const char *, int);
226 void set_location(const char *, int);
227 void simple_line(const position &, const position &);
228 void simple_spline(const position &, const position *, int n);
229 void simple_arc(const position &, const position &, const position &);
230 void simple_circle(int, const position &, double rad);
231 void simple_ellipse(int, const position &, const distance &);
232 void simple_polygon(int, const position *, int);
233 void line_thickness(double p);
234 void set_fill(double);
235 void set_color(char *, char *);
237 char *get_last_filled();
238 char *get_outline_color();
239 position transform(const position &);
242 output *make_troff_output()
244 return new troff_output;
247 troff_output::troff_output()
248 : last_filename(0), last_line_thickness(BAD_THICKNESS),
249 last_fill(-1.0), last_filled(0), last_outlined(0)
253 troff_output::~troff_output()
257 inline position troff_output::transform(const position &pos)
259 return position((pos.x - upper_left.x)/scale,
260 (upper_left.y - pos.y)/scale);
263 #define FILL_REG "00"
265 // If this register > 0, then pic will generate \X'ps: ...' commands
266 // if the aligned attribute is used.
267 #define GROPS_REG "0p"
269 // If this register is defined, geqn won't produce `\x's.
270 #define EQN_NO_EXTRA_SPACE_REG "0x"
272 void troff_output::start_picture(double sc,
273 const position &ll, const position &ur)
277 scale = compute_scale(sc, ll, ur);
278 height = (ur.y - ll.y)/scale;
279 double width = (ur.x - ll.x)/scale;
280 printf(".PS %.3fi %.3fi", height, width);
282 printf(" %s\n", args);
285 printf(".\\\" %g %g %g %g\n", ll.x, ll.y, ur.x, ur.y);
286 printf(".\\\" %.3fi %.3fi %.3fi %.3fi\n", 0.0, height, width, 0.0);
287 printf(".nr " FILL_REG " \\n(.u\n.nf\n");
288 printf(".nr " EQN_NO_EXTRA_SPACE_REG " 1\n");
289 // This guarantees that if the picture is used in a diversion it will
290 // have the right width.
291 printf("\\h'%.3fi'\n.sp -1\n", width);
294 void troff_output::finish_picture()
296 line_thickness(BAD_THICKNESS);
297 last_fill = -1.0; // force it to be reset for each picture
300 printf(".sp %.3fi+1\n", height);
301 printf(".if \\n(" FILL_REG " .fi\n");
303 printf(".nr " EQN_NO_EXTRA_SPACE_REG " 0\n");
304 // this is a little gross
305 set_location(current_filename, current_lineno);
306 fputs(flyback_flag ? ".PF\n" : ".PE\n", stdout);
309 void troff_output::command(const char *s,
310 const char *filename, int lineno)
313 set_location(filename, lineno);
318 void troff_output::simple_circle(int filled, const position ¢, double rad)
320 position c = transform(cent);
327 (filled ? 'C' : 'c'),
331 void troff_output::simple_ellipse(int filled, const position ¢,
334 position c = transform(cent);
339 c.x - dim.x/(2.0*scale),
341 (filled ? 'E' : 'e'),
342 dim.x/scale, dim.y/scale);
345 void troff_output::simple_arc(const position &start, const distance ¢,
348 position s = transform(start);
349 position c = transform(cent);
351 distance ev = transform(end) - c;
354 "\\D'a%.3fi %.3fi %.3fi %.3fi'"
356 s.x, s.y, cv.x, cv.y, ev.x, ev.y);
359 void troff_output::simple_line(const position &start, const position &end)
361 position s = transform(start);
362 distance ev = transform(end) - s;
367 s.x, s.y, ev.x, ev.y);
370 void troff_output::simple_spline(const position &start,
371 const position *v, int n)
373 position pos = transform(start);
377 fputs("\\D'~", stdout);
378 for (int i = 0; i < n; i++) {
379 position temp = transform(v[i]);
380 distance d = temp - pos;
384 printf("%.3fi %.3fi", d.x, d.y);
386 printf("'\n.sp -1\n");
391 void troff_output::simple_polygon(int filled, const position *v, int n)
393 position pos = transform(v[0]);
397 printf("\\D'%c", (filled ? 'P' : 'p'));
398 for (int i = 1; i < n; i++) {
399 position temp = transform(v[i]);
400 distance d = temp - pos;
404 printf("%.3fi %.3fi", d.x, d.y);
406 printf("'\n.sp -1\n");
409 const double TEXT_AXIS = 0.22; // in ems
411 static const char *choose_delimiter(const char *text)
413 if (strchr(text, '\'') == 0)
419 void troff_output::text(const position ¢er, text_piece *v, int n,
422 line_thickness(BAD_THICKNESS); // the text might use lines (eg in equations)
424 if (driver_extension_flag && ang != 0.0) {
426 position c = transform(center);
427 printf(".if \\n(" GROPS_REG " \\{\\\n"
430 "\\X'ps: exec gsave currentpoint 2 copy translate %.4f rotate neg exch neg exch translate'"
433 c.x, c.y, -ang*180.0/M_PI);
435 for (int i = 0; i < n; i++)
436 if (v[i].text != 0 && *v[i].text != '\0') {
437 position c = transform(center);
438 if (v[i].filename != 0)
439 set_location(v[i].filename, v[i].lineno);
440 printf("\\h'%.3fi", c.x);
441 const char *delim = choose_delimiter(v[i].text);
442 if (v[i].adj.h == RIGHT_ADJUST)
443 printf("-\\w%s%s%su", delim, v[i].text, delim);
444 else if (v[i].adj.h != LEFT_ADJUST)
445 printf("-(\\w%s%s%su/2u)", delim, v[i].text, delim);
447 printf("\\v'%.3fi-(%dv/2u)+%dv+%.2fm",
452 if (v[i].adj.v == ABOVE_ADJUST)
454 else if (v[i].adj.v == BELOW_ADJUST)
457 fputs(v[i].text, stdout);
458 fputs("\n.sp -1\n", stdout);
461 printf(".if '\\*(.T'ps' \\{\\\n"
462 "\\X'ps: exec grestore'\n.sp -1\n"
466 void troff_output::line_thickness(double p)
469 p = RELATIVE_THICKNESS;
470 if (driver_extension_flag && p != last_line_thickness) {
471 printf("\\D't %.3fp'\\h'%.3fp'\n.sp -1\n", p, -p);
472 last_line_thickness = p;
476 void troff_output::set_fill(double f)
478 if (driver_extension_flag && f != last_fill) {
479 printf("\\D'Fg %.3f'\n.sp -1\n", 1.0 - f);
485 printf("\\M[]\n.sp -1\n");
489 void troff_output::set_color(char *color_fill, char *color_outlined)
491 if (driver_extension_flag) {
492 if (last_filled || last_outlined) {
496 printf("\\M[%s]\n.sp -1\n", color_fill);
497 last_filled = strsave(color_fill);
499 if (color_outlined) {
500 printf("\\m[%s]\n.sp -1\n", color_outlined);
501 last_outlined = strsave(color_outlined);
506 void troff_output::reset_color()
508 if (driver_extension_flag) {
510 printf("\\M[]\n.sp -1\n");
511 a_delete last_filled;
515 printf("\\m[]\n.sp -1\n");
516 a_delete last_outlined;
522 char *troff_output::get_last_filled()
527 char *troff_output::get_outline_color()
529 return last_outlined;
532 const double DOT_AXIS = .044;
534 void troff_output::dot(const position ¢, const line_type <)
536 if (driver_extension_flag) {
537 line_thickness(lt.thickness);
538 simple_line(cent, cent);
541 position c = transform(cent);
542 printf("\\h'%.3fi-(\\w'.'u/2u)'"
551 void troff_output::set_location(const char *s, int n)
553 if (last_filename != 0 && strcmp(s, last_filename) == 0)
554 printf(".lf %d\n", n);
556 printf(".lf %d %s\n", n, s);