| 1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Radiance picture to PostScript file translator -- one way! |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <stdio.h> |
| 12 |
#include <math.h> |
| 13 |
#ifdef MSDOS |
| 14 |
#include <fcntl.h> |
| 15 |
#endif |
| 16 |
#include "color.h" |
| 17 |
|
| 18 |
#define CODE6GAM 1.47 /* gamma for 6-bit codes */ |
| 19 |
#define DEFDGAM 1.0 /* default device gamma */ |
| 20 |
|
| 21 |
#define GRY -1 /* artificial index for grey */ |
| 22 |
|
| 23 |
#define HMARGIN (.5*72) /* horizontal margin */ |
| 24 |
#define VMARGIN (.5*72) /* vertical margin */ |
| 25 |
#define PWIDTH (8.5*72-2*HMARGIN) /* width of device */ |
| 26 |
#define PHEIGHT (11*72-2*VMARGIN) /* height of device */ |
| 27 |
|
| 28 |
#define RUNCHR '*' /* character to start rle */ |
| 29 |
#define MINRUN 4 /* minimum run-length */ |
| 30 |
#define RSTRT '!' /* character for MINRUN */ |
| 31 |
#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */ |
| 32 |
|
| 33 |
char code[] = /* 6-bit code lookup table */ |
| 34 |
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+"; |
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|
| 36 |
int wrongformat = 0; /* input in wrong format? */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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|
| 39 |
double devgam = DEFDGAM; /* device gamma response */ |
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int docolor = 0; /* produce color image? */ |
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int bradj = 0; /* brightness adjustment */ |
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int ncopies = 1; /* number of copies */ |
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|
| 44 |
extern int Aputprim(), Bputprim(), Cputprim(); |
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|
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int (*putprim)() = Aputprim; /* function for writing scanline */ |
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|
| 48 |
char *progname; |
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|
| 50 |
int xmax, ymax; |
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|
| 52 |
extern char *malloc(); |
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|
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|
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headline(s) /* check header line */ |
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char *s; |
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{ |
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char fmt[32]; |
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|
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if (isformat(s)) { |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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} else if (isaspect(s)) |
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pixaspect *= aspectval(s); |
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} |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int i; |
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|
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progname = argv[0]; |
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|
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'b': /* produce b&w PostScript */ |
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docolor = 0; |
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break; |
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case 'c': /* produce color PostScript */ |
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docolor = 1; |
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break; |
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case 'A': /* standard ASCII encoding */ |
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putprim = Aputprim; |
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break; |
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case 'B': /* standard binary encoding */ |
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putprim = Bputprim; |
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break; |
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case 'C': /* compressed ASCII encoding */ |
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putprim = Cputprim; |
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break; |
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case 'g': |
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devgam = atof(argv[++i]); |
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break; |
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case 'e': /* exposure adjustment */ |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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bradj = atoi(argv[++i]); |
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break; |
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case 'n': /* number of copies */ |
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ncopies = atoi(argv[++i]); |
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break; |
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default: |
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goto userr; |
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} |
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else |
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break; |
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|
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if (i < argc-2) |
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goto userr; |
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if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
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fprintf(stderr, "%s: can't open input \"%s\"\n", |
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progname, argv[i]); |
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exit(1); |
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} |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
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fprintf(stderr, "%s: can't open output \"%s\"\n", |
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progname, argv[i+1]); |
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exit(1); |
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} |
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#ifdef MSDOS |
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setmode(fileno(stdin), O_BINARY); |
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#endif |
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/* get our header */ |
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getheader(stdin, headline, NULL); |
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if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0) |
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quiterr("bad picture format"); |
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/* gamma compression */ |
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if (putprim == Cputprim) |
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setcolrgam(CODE6GAM/devgam); |
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else if (devgam != 1.) |
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setcolrgam(1./devgam); |
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/* write header */ |
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PSheader(i <= argc-1 ? argv[i] : "<stdin>"); |
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/* convert file */ |
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ra2ps(); |
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/* write trailer */ |
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PStrailer(); |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-b|c][-A|B|C][-e +/-stops][-g gamma] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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|
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|
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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
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if (err != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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exit(0); |
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} |
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|
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|
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PSheader(name) /* print PostScript header */ |
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char *name; |
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{ |
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char *rstr; |
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int landscape = 0; |
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double pwidth, pheight; |
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double iwidth, iheight; |
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/* EPS comments */ |
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puts("%!PS-Adobe-2.0 EPSF-2.0"); |
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printf("%%%%Title: %s\n", name); |
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printf("%%%%Creator: %s = %s\n", progname, SCCSid); |
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printf("%%%%Pages: %d\n", ncopies); |
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if (landscape = xmax > pixaspect*ymax) |
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puts("%%Orientation: Landscape"); |
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else |
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puts("%%Orientation: Portrait"); |
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if (PWIDTH > PHEIGHT ^ landscape) { |
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pwidth = PHEIGHT; |
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pheight = PWIDTH; |
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} else { |
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pwidth = PWIDTH; |
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pheight = PHEIGHT; |
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} |
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if (pheight/pwidth > pixaspect*ymax/xmax) { |
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iwidth = pwidth; |
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iheight = pwidth*pixaspect*ymax/xmax; |
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} else { |
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iheight = pheight; |
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iwidth = pheight*xmax/(pixaspect*ymax); |
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} |
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if (pwidth == PHEIGHT) |
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printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n", |
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HMARGIN+(pheight-iheight)*.5, |
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VMARGIN+(pwidth-iwidth)*.5, |
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HMARGIN+(pheight-iheight)*.5+iheight, |
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VMARGIN+(pwidth-iwidth)*.5+iwidth); |
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else |
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printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n", |
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HMARGIN+(pwidth-iwidth)*.5, |
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VMARGIN+(pheight-iheight)*.5, |
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HMARGIN+(pwidth-iwidth)*.5+iwidth, |
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VMARGIN+(pheight-iheight)*.5+iheight); |
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puts("%%EndComments"); |
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puts("gsave save"); |
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puts("17 dict begin"); |
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/* define image reader */ |
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if (docolor) { |
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printf("/redline %d string def\n", xmax); |
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printf("/grnline %d string def\n", xmax); |
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printf("/bluline %d string def\n", xmax); |
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} else |
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printf("/gryline %d string def\n", xmax); |
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/* use compressed encoding? */ |
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if (putprim == Cputprim) |
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PSprocdef("read6bitRLE"); |
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/* set up transformation matrix */ |
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printf("%f %f translate\n", HMARGIN, VMARGIN); |
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if (pwidth == PHEIGHT) { |
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printf("%f 0 translate\n", PWIDTH); |
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puts("90 rotate"); |
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} |
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printf("%f %f translate\n", (pwidth-iwidth)*.5, (pheight-iheight)*.5); |
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printf("%f %f scale\n", iwidth, iheight); |
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puts("%%EndProlog"); |
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/* start image procedure */ |
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printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax); |
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if (putprim == Cputprim) { |
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if (docolor) { |
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puts("{redline read6bitRLE}"); |
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puts("{grnline read6bitRLE}"); |
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puts("{bluline read6bitRLE}"); |
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puts("true 3 colorimage"); |
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} else |
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puts("{gryline read6bitRLE} image"); |
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} else { |
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rstr = putprim==Aputprim ? "readhexstring" : "readstring"; |
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if (docolor) { |
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printf("{currentfile redline %s pop}\n", rstr); |
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printf("{currentfile grnline %s pop}\n", rstr); |
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printf("{currentfile bluline %s pop}\n", rstr); |
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puts("true 3 colorimage"); |
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} else |
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printf("{currentfile gryline %s pop} image\n", rstr); |
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} |
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} |
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|
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|
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PStrailer() /* print PostScript trailer */ |
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{ |
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puts("%%Trailer"); |
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if (ncopies > 1) |
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printf("/#copies %d def\n", ncopies); |
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puts("showpage"); |
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puts("end"); |
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puts("restore grestore"); |
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puts("%%EOF"); |
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} |
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|
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|
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PSprocdef(nam) /* define PS procedure to read image */ |
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char *nam; |
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{ |
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short itab[128]; |
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register int i; |
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/* assign code values */ |
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for (i = 0; i < 128; i++) /* clear */ |
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itab[i] = -1; |
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for (i = 1; i < 63; i++) /* assign greys */ |
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itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM); |
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itab[code[0]] = 0; /* black is black */ |
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itab[code[63]] = 255; /* and white is white */ |
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printf("/codetab ["); |
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for (i = 0; i < 128; i++) { |
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if (!(i & 0xf)) |
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putchar('\n'); |
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printf(" %3d", itab[i]); |
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} |
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printf("\n] def\n"); |
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printf("/nrept 0 def\n"); |
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printf("/readbyte { currentfile read not {stop} if } bind def\n"); |
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printf("/decode { codetab exch get } bind def\n"); |
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printf("/%s {\t%% scanbuffer\n", nam); |
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printf("\t/scanline exch def\n"); |
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printf("\t{ 0 1 %d { scanline exch\n", xmax-1); |
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printf("\t\tnrept 0 le\n"); |
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printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR); |
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printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1); |
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printf("\t\t\t\t\t\t/reptv readbyte decode def\n"); |
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printf("\t\t\t\t\t\treptv exit }\n"); |
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printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n"); |
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printf("\t\t\t\tifelse } loop }\n"); |
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printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n"); |
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printf("\t\tifelse put\n"); |
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printf("\t\t} for\n"); |
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printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n"); |
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printf("} bind def\n"); |
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} |
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|
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|
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ra2ps() /* convert Radiance scanlines to 6-bit */ |
| 300 |
{ |
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register COLR *scanin; |
| 302 |
int y; |
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/* allocate scanline */ |
| 304 |
scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
| 305 |
if (scanin == NULL) |
| 306 |
quiterr("out of memory in ra2ps"); |
| 307 |
/* convert image */ |
| 308 |
for (y = ymax-1; y >= 0; y--) { |
| 309 |
if (freadcolrs(scanin, xmax, stdin) < 0) |
| 310 |
quiterr("error reading Radiance picture"); |
| 311 |
if (putprim == Cputprim || devgam != 1.) { |
| 312 |
if (bradj) /* adjust exposure */ |
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shiftcolrs(scanin, xmax, bradj); |
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colrs_gambs(scanin, xmax); /* gamma compression */ |
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} else |
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normcolrs(scanin, xmax, bradj); |
| 317 |
if (docolor) { |
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(*putprim)(scanin, RED); |
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(*putprim)(scanin, GRN); |
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(*putprim)(scanin, BLU); |
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} else |
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(*putprim)(scanin, GRY); |
| 323 |
if (ferror(stdout)) |
| 324 |
quiterr("error writing PostScript file"); |
| 325 |
} |
| 326 |
putchar('\n'); |
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/* free scanline */ |
| 328 |
free((char *)scanin); |
| 329 |
} |
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|
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|
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int |
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Aputprim(scn, pri) /* put out hex ASCII primary from scanline */ |
| 334 |
COLR *scn; |
| 335 |
int pri; |
| 336 |
{ |
| 337 |
static char hexdigit[] = "0123456789ABCDEF"; |
| 338 |
static int col = 0; |
| 339 |
register int x, c; |
| 340 |
|
| 341 |
for (x = 0; x < xmax; x++) { |
| 342 |
if (pri == GRY) |
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c = normbright(scn[x]); |
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else |
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c = scn[x][pri]; |
| 346 |
if (c > 255) c = 255; |
| 347 |
putchar(hexdigit[c>>4]); |
| 348 |
putchar(hexdigit[c&0xf]); |
| 349 |
if ((col += 2) >= 72) { |
| 350 |
putchar('\n'); |
| 351 |
col = 0; |
| 352 |
} |
| 353 |
} |
| 354 |
} |
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|
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|
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int |
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Bputprim(scn, pri) /* put out binary primary from scanline */ |
| 359 |
COLR *scn; |
| 360 |
int pri; |
| 361 |
{ |
| 362 |
register int x, c; |
| 363 |
|
| 364 |
for (x = 0; x < xmax; x++) { |
| 365 |
if (pri == GRY) |
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c = normbright(scn[x]); |
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else |
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c = scn[x][pri]; |
| 369 |
if (c > 255) c = 255; |
| 370 |
putchar(c); |
| 371 |
} |
| 372 |
} |
| 373 |
|
| 374 |
|
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int |
| 376 |
Cputprim(scn, pri) /* put out compressed primary from scanline */ |
| 377 |
COLR *scn; |
| 378 |
int pri; |
| 379 |
{ |
| 380 |
register int c; |
| 381 |
register int x; |
| 382 |
int lastc, cnt; |
| 383 |
|
| 384 |
lastc = -1; cnt = 0; |
| 385 |
for (x = 0; x < xmax; x++) { |
| 386 |
if (pri == GRY) |
| 387 |
c = normbright(scn[x]) + 2; |
| 388 |
else |
| 389 |
c = scn[x][pri] + 2; |
| 390 |
if (c > 255) c = 255; |
| 391 |
c = code[c>>2]; |
| 392 |
if (c == lastc && cnt < MAXRUN) |
| 393 |
cnt++; |
| 394 |
else { |
| 395 |
putrle(cnt, lastc); |
| 396 |
lastc = c; |
| 397 |
cnt = 1; |
| 398 |
} |
| 399 |
} |
| 400 |
putrle(cnt, lastc); |
| 401 |
} |
| 402 |
|
| 403 |
|
| 404 |
putrle(cnt, cod) /* put out cnt of cod */ |
| 405 |
register int cnt, cod; |
| 406 |
{ |
| 407 |
static int col = 0; |
| 408 |
|
| 409 |
if (cnt >= MINRUN) { |
| 410 |
col += 3; |
| 411 |
putchar(RUNCHR); |
| 412 |
putchar(RSTRT-MINRUN+cnt); |
| 413 |
putchar(cod); |
| 414 |
} else { |
| 415 |
col += cnt; |
| 416 |
while (cnt-- > 0) |
| 417 |
putchar(cod); |
| 418 |
} |
| 419 |
if (col >= 72) { |
| 420 |
putchar('\n'); |
| 421 |
col = 0; |
| 422 |
} |
| 423 |
} |
