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/* 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 = iwidth ;
if ( iheight > 0 )
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;
}
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