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/* epsffit.c
* Fit EPSF file into constrained size
*
* (c) Reuben Thomas 2012
* (c) Angus J. C. Duggan 1991-1997
* See file LICENSE for details.
*
* Added filename spec (from Larry Weissman) 5 Feb 93
* Accepts double %%BoundingBox input, outputs proper BB, 4 Jun 93. (I don't
* like this; developers should read the Big Red Book before writing code which
* outputs PostScript.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "psutil.h"
const char *syntax = "[-c] [-r] [-a] [-m] [-s] LLX LLY URX URY [INFILE [OUTFILE]]\n";
const char *argerr_message = "";
int
main(int argc, char **argv)
{
int bbfound = 0; /* %%BoundingBox: found */
int urx = 0, ury = 0, llx = 0, lly = 0;
int furx, fury, fllx, flly;
int showpage = 0, centre = 0, rotate = 0, aspect = 0, maximise = 0;
char buf[BUFSIZ];
FILE *input = stdin;
FILE *output = stdout;
int opt;
SET_BINARY(stdin);
SET_BINARY(stdout);
program = *argv;
while((opt = getopt(argc, argv, "csramv")) != EOF) {
switch(opt) {
case 'c': centre = 1; break;
case 's': showpage = 1; break;
case 'r': rotate = 1; break;
case 'a': aspect = 1; break;
case 'm': maximise = 1; break;
case 'v':
default:
usage();
break;
}
}
if ((argc - optind) < 4 || (argc - optind) > 6) usage();
fllx = atoi(argv[optind++]);
flly = atoi(argv[optind++]);
furx = atoi(argv[optind++]);
fury = atoi(argv[optind++]);
/* Be defensive */
if((argc - optind) < 0 || (argc - optind) > 2) usage();
if ((argc - optind) > 0) {
if(!(input = fopen(argv[optind], "rb")))
message(FATAL, "can't open input file %s\n", argv[optind]);
optind++;
}
if ((argc - optind) > 0) {
if(!(output = fopen(argv[optind], "wb")))
message(FATAL, "can't open output file %s\n", argv[optind]);
optind++;
}
while (fgets(buf, BUFSIZ, input)) {
if (buf[0] == '%' && (buf[1] == '%' || buf[1] == '!')) {
/* still in comment section */
if (!strncmp(buf, "%%BoundingBox:", 14)) {
double illx, illy, iurx, iury; /* input bbox parameters */
if (sscanf(buf, "%%%%BoundingBox:%lf %lf %lf %lf\n",
&illx, &illy, &iurx, &iury) == 4) {
bbfound = 1;
llx = (int)illx; /* accept doubles, but convert to int */
lly = (int)illy;
urx = (int)(iurx+0.5);
ury = (int)(iury+0.5);
}
} else if (!strncmp(buf, "%%EndComments", 13)) {
strcpy(buf, "\n"); /* don't repeat %%EndComments */
break;
} else fputs(buf, output);
} else break;
}
if (bbfound) { /* put BB, followed by scale&translate */
int fwidth, fheight;
double xscale, yscale;
double xoffset = fllx, yoffset = flly;
double width = urx-llx, height = ury-lly;
if (maximise)
if ((width > height && fury-flly > furx-fllx) ||
(width < height && fury-flly < furx-fllx))
rotate = 1;
if (rotate) {
fwidth = fury - flly;
fheight = furx - fllx;
} else {
fwidth = furx - fllx;
fheight = fury - flly;
}
xscale = fwidth/width;
yscale = fheight/height;
if (!aspect) { /* preserve aspect ratio ? */
xscale = yscale = MIN(xscale,yscale);
}
width *= xscale; /* actual width and height after scaling */
height *= yscale;
if (centre) {
if (rotate) {
xoffset += (fheight - height)/2;
yoffset += (fwidth - width)/2;
} else {
xoffset += (fwidth - width)/2;
yoffset += (fheight - height)/2;
}
}
fprintf(output,
"%%%%BoundingBox: %d %d %d %d\n", (int)xoffset, (int)yoffset,
(int)(xoffset+(rotate ? height : width)),
(int)(yoffset+(rotate ? width : height)));
if (rotate) { /* compensate for original image shift */
xoffset += height + lly * yscale; /* displacement for rotation */
yoffset -= llx * xscale;
} else {
xoffset -= llx * xscale;
yoffset -= lly * yscale;
}
fputs("%%EndComments\n", output);
if (showpage)
fputs("save /showpage{}def /copypage{}def /erasepage{}def\n", output);
else
fputs("%%BeginProcSet: epsffit 1 0\n", output);
fputs("gsave\n", output);
fprintf(output, "%.3f %.3f translate\n", xoffset, yoffset);
if (rotate)
fputs("90 rotate\n", output);
fprintf(output, "%.3f %.3f scale\n", xscale, yscale);
if (!showpage)
fputs("%%EndProcSet\n", output);
}
do {
fputs(buf, output);
} while (fgets(buf, BUFSIZ, input));
if (bbfound) {
fputs("grestore\n", output);
if (showpage)
fputs("restore showpage\n", output); /* just in case */
} else
message(FATAL, "no %%%%BoundingBox:\n");
return 0;
}
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