summaryrefslogtreecommitdiff
path: root/Build/source/texk/psutils/psutils-1.23/psnup.c
blob: 5efb2c13385370cb5cd8eaca9e8076b8e4de4c07 (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
/* psnup.c
 * Put multiple pages on to one page
 *
 * (c) Reuben Thomas 2012-2014
 * (c) Angus J. C. Duggan 1991-1997
 * See file LICENSE for details.
 */

#include "config.h"

#include <unistd.h>
#include <string.h>
#include "progname.h"
#include "binary-io.h"

#include "psutil.h"
#include "psspec.h"

const char *syntax = "[-q] [-wWIDTH] [-hHEIGHT] [-pPAPER] [-WWIDTH] [-HHEIGHT] [-PPAPER] [-l] [-r] [-c] [-f] [-mMARGIN] [-bBORDER] [-dLWIDTH] [-sSCALE] [-NUP] [INFILE [OUTFILE]]\n";

const char *argerr_message = "bad dimension\n";

/* return next larger exact divisor of number, or 0 if none. There is probably
 * a much more efficient method of doing this, but the numbers involved are
 * small, so it's not a big loss. */
_GL_ATTRIBUTE_CONST static int nextdiv(int n, int m)
{
   while (++n <= m) {
      if (m%n == 0)
	 return (n);
   }
   return (0);
}

int
main(int argc, char *argv[])
{
   int horiz = 0, vert = 0, rotate = 0, column = 0;
   int flip = 0, leftright = 0, topbottom = 0;
   int nup = 1;
   double draw = 0;				/* draw page borders */
   double scale = 1.0;				/* page scale */
   double uscale = 0;				/* user supplied scale */
   double ppwid, pphgt;				/* paper dimensions */
   double margin, border;			/* paper & page margins */
   double vshift, hshift;			/* page centring shifts */
   double iwidth, iheight ;			/* input paper size */
   double tolerance = 100000;			/* layout tolerance */
   off_t sizeheaders[20];			/* headers to remove */
   int opt;

   set_program_name (argv[0]);

   verbose = 1;

   if (!paper_size(NULL, &width, &height))
     die("could not get default paper size");

   margin = border = vshift = hshift = column = flip = 0;
   leftright = topbottom = 1;
   iwidth = iheight = -1 ;

   while((opt =
          getopt(argc, argv,
                 "qd::lrfcw:W:h:H:m:b:t:s:p:P:n:1::2::3::4::5::6::7::8::9::"))
         != EOF) {
     switch(opt) {
     case 'q':	/* quiet */
       verbose = 0;
       break;
     case 'd':	/* draw borders */
       if (optarg)
         draw = singledimen(optarg);
       else
         draw = 1;
       break;
     case 'l':	/* landscape (rotated left) */
       column = !column;
       topbottom = !topbottom;
       break;
     case 'r':	/* seascape (rotated right) */
       column = !column;
       leftright = !leftright;
       break;
     case 'f':	/* flipped */
       flip = 1;
       break;
     case 'c':	/* column major layout */
       column = !column;
       break;
     case 'w':	/* page width */
       width = singledimen(optarg);
       break;
     case 'W':	/* input page width */
       iwidth = singledimen(optarg);
       break;
     case 'h':	/* page height */
       height = singledimen(optarg);
       break;
     case 'H':	/* input page height */
       iheight = singledimen(optarg);
       break;
     case 'm':	/* margins around whole page */
       margin = singledimen(optarg);
       break;
     case 'b':	/* border around individual pages */
       border = singledimen(optarg);
       break;
     case 't':	/* layout tolerance */
       tolerance = atof(optarg);
       break;
     case 's':	/* override scale */
       uscale = atof(optarg);
       break;
     case 'p':	/* output (and by default input) paper type */
       if (!paper_size(optarg, &width, &height))
         die("paper size '%s' not recognised", optarg);
       break;
     case 'P':	/* paper type */
       if (!paper_size(optarg, &width, &height))
         die("paper size '%s' not recognised", optarg);
       break;
     case 'n':	/* n-up, for compatibility with other psnups */
       if ((nup = atoi(optarg)) < 1)
         die("-n %d too small", nup);
       break;
     case '1':
     case '2':
     case '3':
     case '4':
     case '5':
     case '6':
     case '7':
     case '8':
     case '9':
       if(optarg) {
         char *valuestr = (char *) malloc(strlen(optarg) + 2);
         valuestr[0] = opt;
         strcpy(&(valuestr[1]), optarg);

         /* really should check that valuestr is only digits here...*/
         if ((nup = atoi(valuestr)) < 1)
           die("-n %d too small", nup);
         free(valuestr);
       } else {
         nup = (opt - '0');
       }
       break;
     case 'v':	/* version */
     default:
       usage();
     }
   }

   infile = stdin;
   outfile = stdout;

   /* Be defensive */
   if((argc - optind) < 0 || (argc - optind) > 2) usage();

   if (optind != argc) {
     /* User specified an input file */
     if ((infile = fopen(argv[optind], "rb")) == NULL)
       die("can't open input file %s", argv[optind]);
     optind++;
   }

   if (optind != argc) {
     /* User specified an output file */
     if ((outfile = fopen(argv[optind], "wb")) == NULL)
       die("can't open output file %s", argv[optind]);
     optind++;
   }

   if (optind != argc) usage();

   if (infile == stdin && set_binary_mode(fileno(stdin), O_BINARY) < 0)
     die("can't reset stdin to binary mode");
   if (outfile == stdout && set_binary_mode(fileno(stdout), O_BINARY) < 0)
     die("can't reset stdout to binary mode");

   if ((infile=seekable(infile))==NULL)
      die("can't seek input");

   if (width <= 0 || height <= 0)
      die("page width and height must be set");

   /* subtract paper margins from height & width */
   ppwid = width - margin*2;
   pphgt = height - margin*2;

   if (ppwid <= 0 || pphgt <= 0)
      die("paper margins are too large");

   scanpages(sizeheaders);

   /* set default values of input height & width */
   if ( iwidth > 0 && width == -1 )
     width = iwidth ;
   if ( iheight > 0 && height == -1 )
     height = iheight ;

   /* Finding the best layout is an optimisation problem. We try all of the
    * combinations of width*height in both normal and rotated form, and
    * minimise the wasted space. */
   {
      double best = tolerance;
      int hor;
      for (hor = 1; hor; hor = nextdiv(hor, nup)) {
	 int ver = nup/hor;
	 /* try normal orientation first */
	 double scl = MIN(pphgt/(height*ver), ppwid/(width*hor));
	 double optim = (ppwid-scl*width*hor)*(ppwid-scl*width*hor) +
	    (pphgt-scl*height*ver)*(pphgt-scl*height*ver);
	 if (optim < best) {
	    best = optim;
	    /* recalculate scale to allow for internal borders */
	    scale = MIN((pphgt-2*border*ver)/(height*ver),
			(ppwid-2*border*hor)/(width*hor));
	    hshift = (ppwid/hor - width*scale)/2;
	    vshift = (pphgt/ver - height*scale)/2;
	    horiz = hor; vert = ver;
	    rotate = flip;
	 }
	 /* try rotated orientation */
	 scl = MIN(pphgt/(width*hor), ppwid/(height*ver));
	 optim = (pphgt-scl*width*hor)*(pphgt-scl*width*hor) +
	    (ppwid-scl*height*ver)*(ppwid-scl*height*ver);
	 if (optim < best) {
	    best = optim;
	    /* recalculate scale to allow for internal borders */
	    scale = MIN((pphgt-2*border*hor)/(width*hor),
			(ppwid-2*border*ver)/(height*ver));
	    hshift = (ppwid/ver - height*scale)/2;
	    vshift = (pphgt/hor - width*scale)/2;
	    horiz = ver; vert = hor;
	    rotate = !flip;
	 }
      }

      /* fail if nothing better than worst tolerance was found */
      if (best == tolerance)
	 die("can't find acceptable layout for %d-up", nup);
   }

   if (flip) {	/* swap width & height for clipping */
      double tmp = width;
      width = height;
      height = tmp;
   }

   if (rotate) {	/* rotate leftright and topbottom orders */
      int tmp = topbottom;
      topbottom = !leftright;
      leftright = tmp;
      column = !column;
   }

   /* now construct specification list and run page rearrangement procedure */
   {
      int page = 0;
      PageSpec *specs, *tail;

      tail = specs = newspec();

      while (page < nup) {
	 int up, across;		/* page index */

	 if (column) {
	    if (leftright)		/* left to right */
	       across = page/vert;
	    else			/* right to left */
	       across = horiz-1-page/vert;
	    if (topbottom)		/* top to bottom */
	       up = vert-1-page%vert;
	    else			/* bottom to top */
	       up = page%vert;
	 } else {
	    if (leftright)		/* left to right */
	       across = page%horiz;
	    else			/* right to left */
	       across = horiz-1-page%horiz;
	    if (topbottom)		/* top to bottom */
	       up = vert-1-page/horiz;
	    else			/* bottom to top */
	       up = page/horiz;
	 }
	 if (rotate) {
	    tail->xoff = margin + (across+1)*ppwid/horiz - hshift;
	    tail->rotate = 90;
	    tail->flags |= ROTATE;
	 } else {
	    tail->xoff = margin + across*ppwid/horiz + hshift;
	 }
	 tail->pageno = page;
	 if (uscale > 0)
	    tail->scale = uscale;
	 else
	    tail->scale = scale;
	 tail->flags |= SCALE;
	 tail->yoff = margin + up*pphgt/vert + vshift;
	 tail->flags |= OFFSET;
	 if (++page < nup) {
	    tail->flags |= ADD_NEXT;
	    tail->next = newspec();
	    tail = tail->next;
	 }
      }
      
      pstops_write(nup, 1, 0, specs, draw, sizeheaders); /* do page rearrangement */
   }

   return 0;
}