src/px/ra_ps.c

/* Copyright (c) 1997 Silicon Graphics, Inc. */

#ifndef lint
static char SCCSid[] = "$SunId$ SGI";
#endif

/*
 *  Radiance picture to PostScript file translator -- one way!
 */

#include  <stdio.h>
#include  <math.h>
#include  <ctype.h>
#ifdef MSDOS
#include  <fcntl.h>
#endif
#include  "color.h"

#define UPPER(c)        ((c)&~0x20)             /* ASCII trick */

#define CODE6GAM        1.47                    /* gamma for 6-bit codes */
#define DEFDGAM         1.0                     /* default device gamma */

#define GRY             -1                      /* artificial index for grey */

#define DEFMARG         0.5                     /* default margin (inches) */
#define DEFWIDTH        8.5                     /* default page width */
#define DEFHEIGHT       11                      /* default page height */
#define HMARGIN         (hmarg*72)              /* horizontal margin */
#define VMARGIN         (vmarg*72)              /* vertical margin */
#define PWIDTH          (width*72-2*HMARGIN)    /* width of device */
#define PHEIGHT         (height*72-2*VMARGIN)   /* height of device */

#define RUNCHR          '*'                     /* character to start rle */
#define MINRUN          4                       /* minimum run-length */
#define RSTRT           '!'                     /* character for MINRUN */
#define MAXRUN          (MINRUN+'~'-RSTRT)      /* maximum run-length */

char  code[] =                  /* 6-bit code lookup table */
        "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+";

int  wrongformat = 0;                   /* input in wrong format? */
double  pixaspect = 1.0;                /* pixel aspect ratio */

double  devgam = DEFDGAM;               /* device gamma response */
double  hmarg = DEFMARG,
        vmarg = DEFMARG;                /* horizontal and vertical margins */
double  width = DEFWIDTH,
        height = DEFHEIGHT;             /* default paper width and height */
int  docolor = 0;                       /* produce color image? */
int  bradj = 0;                         /* brightness adjustment */
int  ncopies = 1;                       /* number of copies */

extern int      Aputprim(), Bputprim(), Cputprim();

int  (*putprim)() = Aputprim;           /* function for writing scanline */

char  *progname;

int  xmax, ymax;

extern char  *malloc();
extern double   unit2inch();


headline(s)             /* check header line */
char  *s;
{
        char  fmt[32];

        if (isformat(s)) {
                formatval(fmt, s);
                wrongformat = strcmp(fmt, COLRFMT);
        } else if (isaspect(s))
                pixaspect *= aspectval(s);
}


main(argc, argv)
int  argc;
char  *argv[];
{
        int  i;
        double  d;
        
        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'b':               /* produce b&w PostScript */
                                docolor = 0;
                                break;
                        case 'c':               /* produce color PostScript */
                                docolor = 1;
                                break;
                        case 'A':               /* standard ASCII encoding */
                                putprim = Aputprim;
                                break;
                        case 'B':               /* standard binary encoding */
                                putprim = Bputprim;
                                break;
                        case 'C':               /* compressed ASCII encoding */
                                putprim = Cputprim;
                                break;
                        case 'g':               /* device gamma adjustment */
                                devgam = atof(argv[++i]);
                                break;
                        case 'p':               /* paper size */
                                parsepaper(argv[++i]);
                                break;
                        case 'm':               /* margin */
                                d = atof(argv[i+1]);
                                d *= unit2inch(argv[i+1]);
                                switch (argv[i][2]) {
                                case '\0':
                                        hmarg = vmarg = d;
                                        break;
                                case 'h':
                                        hmarg = d;
                                        break;
                                case 'v':
                                        vmarg = d;
                                        break;
                                default:
                                        goto userr;
                                }
                                i++;
                                break;
                        case 'e':               /* exposure adjustment */
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = atoi(argv[++i]);
                                break;
                        case 'n':               /* number of copies */
                                ncopies = atoi(argv[++i]);
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        if (i < argc-2)
                goto userr;
        if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
                fprintf(stderr, "%s: can't open input \"%s\"\n",
                                progname, argv[i]);
                exit(1);
        }
        if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
                fprintf(stderr, "%s: can't open output \"%s\"\n",
                                progname, argv[i+1]);
                exit(1);
        }
#ifdef MSDOS
        setmode(fileno(stdin), O_BINARY);
#endif
                                /* get our header */
        getheader(stdin, headline, NULL);
        if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0)
                quiterr("bad picture format");
                                /* gamma compression */
        if (putprim == Cputprim)
                setcolrgam(CODE6GAM);
        else if (devgam != 1.)
                setcolrgam(devgam);
                                /* write header */
        PSheader(i <= argc-1 ? argv[i] : "<stdin>");
                                /* convert file */
        ra2ps();
                                /* write trailer */
        PStrailer();
        exit(0);
userr:
        fprintf(stderr,
"Usage: %s [-b|c][-A|B|C][-e +/-stops][-p paper][-m[h|v] margin][-g gamma] [input [output]]\n",
                        progname);
        exit(1);
}


double
unit2inch(s)            /* determine unit */
register char   *s;
{
        static struct unit {char n; float f} u[] = {
                'i', 1.,
                'm', 1./25.4,
                'c', 1./2.54,
                '\0' };
        register struct unit    *up;

        while (*s && !isalpha(*s))
                s++;
        for (up = u; up->n; up++)
                if (up->n == *s)
                        return(up->f);
        return(1.);
}


int
matchid(name, id)       /* see if name matches id (case insensitive) */
char    *name;
register char   *id;
{
        register char   *s = name;

        while (*s) {
                if (isalpha(*s)) {
                        if (!isalpha(*id) || UPPER(*s) != UPPER(*id))
                                return(0);
                } else if (*s != *id)
                        return(0);
                s++; id++;
        }
        return(!*id || s-name >= 3);    /* substrings >= 3 chars OK */
}


parsepaper(ps)          /* determine paper size from name */
char    *ps;
{
        static struct psize {char n[12]; float w,h;} p[] = {
                "envelope", 4.12, 9.5,
                "executive", 7.25, 10.5,
                "letter", 8.5, 11.,
                "lettersmall", 7.68, 10.16,
                "legal", 8.5, 14.,
                "monarch", 3.87, 7.5,
                "statement", 5.5, 8.5,
                "tabloid", 11., 17.,
                "A3", 11.69, 16.54,
                "A4", 8.27, 11.69,
                "A4small", 7.47, 10.85,
                "A5", 6.00, 8.27,
                "A6", 4.13, 6.00,
                "B4", 10.12, 14.33,
                "B5", 7.17, 10.12,
                "C5", 6.38, 9.01,
                "C6", 4.49, 6.38,
                "DL", 4.33, 8.66,
                "hagaki", 3.94, 5.83,
                "" };
        register struct psize   *pp;
        register char   *s = ps;
        double  d;

        if (isdigit(*s)) {              /* check for WWxHH specification */
                width = atof(s);
                while (*s && !isalpha(*s))
                        s++;
                d = unit2inch(s);
                height = atof(++s);
                width *= d;
                height *= d;
                if (width >= 1. & height >= 1.)
                        return;
        } else                          /* check for match to standard size */
                for (pp = p; pp->n[0]; pp++)
                        if (matchid(s, pp->n)) {
                                width = pp->w;
                                height = pp->h;
                                return;
                        }
        fprintf(stderr, "%s: unknown paper size \"%s\" -- known sizes:\n",
                        progname, ps);
        fprintf(stderr, "_Name________Width_Height_(inches)\n");
        for (pp = p; pp->n[0]; pp++)
                fprintf(stderr, "%-11s  %5.2f  %5.2f\n", pp->n, pp->w, pp->h);
        fprintf(stderr, "Or use WWxHH size specification\n");
        exit(1);
}


quiterr(err)            /* print message and exit */
char  *err;
{
        if (err != NULL) {
                fprintf(stderr, "%s: %s\n", progname, err);
                exit(1);
        }
        exit(0);
}


PSheader(name)                  /* print PostScript header */
char  *name;
{
        char  *rstr;
        int  landscape = 0;
        double  pwidth, pheight;
        double  iwidth, iheight;
                                        /* EPS comments */
        puts("%!PS-Adobe-2.0 EPSF-2.0");
        printf("%%%%Title: %s\n", name);
        printf("%%%%Creator: %s = %s\n", progname, SCCSid);
        printf("%%%%Pages: %d\n", ncopies);
        if (landscape = xmax > pixaspect*ymax)
                puts("%%Orientation: Landscape");
        else
                puts("%%Orientation: Portrait");
        if (PWIDTH > PHEIGHT ^ landscape) {
                pwidth = PHEIGHT;
                pheight = PWIDTH;
        } else {
                pwidth = PWIDTH;
                pheight = PHEIGHT;
        }
        if (pheight/pwidth > pixaspect*ymax/xmax) {
                iwidth = pwidth;
                iheight = pwidth*pixaspect*ymax/xmax;
        } else {
                iheight = pheight;
                iwidth = pheight*xmax/(pixaspect*ymax);
        }
        if (pwidth == PHEIGHT)
                printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n",
                                HMARGIN+(pheight-iheight)*.5,
                                VMARGIN+(pwidth-iwidth)*.5,
                                HMARGIN+(pheight-iheight)*.5+iheight,
                                VMARGIN+(pwidth-iwidth)*.5+iwidth);
        else
                printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n",
                                HMARGIN+(pwidth-iwidth)*.5,
                                VMARGIN+(pheight-iheight)*.5,
                                HMARGIN+(pwidth-iwidth)*.5+iwidth,
                                VMARGIN+(pheight-iheight)*.5+iheight);
        puts("%%EndComments");
        puts("gsave save");
        puts("17 dict begin");
                                        /* define image reader */
        if (docolor) {
                printf("/redline %d string def\n", xmax);
                printf("/grnline %d string def\n", xmax);
                printf("/bluline %d string def\n", xmax);
        } else
                printf("/gryline %d string def\n", xmax);
                                        /* use compressed encoding? */
        if (putprim == Cputprim)
                PSprocdef("read6bitRLE");
                                        /* set up transformation matrix */
        printf("%f %f translate\n", HMARGIN, VMARGIN);
        if (pwidth == PHEIGHT) {
                printf("%f 0 translate\n", PWIDTH);
                puts("90 rotate");
        }
        printf("%f %f translate\n", (pwidth-iwidth)*.5, (pheight-iheight)*.5);
        printf("%f %f scale\n", iwidth, iheight);
        puts("%%EndProlog");
                                        /* start image procedure */
        printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax);
        if (putprim == Cputprim) {
                if (docolor) {
                        puts("{redline read6bitRLE}");
                        puts("{grnline read6bitRLE}");
                        puts("{bluline read6bitRLE}");
                        puts("true 3 colorimage");
                } else
                        puts("{gryline read6bitRLE} image");
        } else {
                rstr = putprim==Aputprim ? "readhexstring" : "readstring";
                if (docolor) {
                        printf("{currentfile redline %s pop}\n", rstr);
                        printf("{currentfile grnline %s pop}\n", rstr);
                        printf("{currentfile bluline %s pop}\n", rstr);
                        puts("true 3 colorimage");
                } else
                        printf("{currentfile gryline %s pop} image\n", rstr);
        }
}


PStrailer()                     /* print PostScript trailer */
{
        puts("%%Trailer");
        if (ncopies > 1)
                printf("/#copies %d def\n", ncopies);
        puts("showpage");
        puts("end");
        puts("restore grestore");
        puts("%%EOF");
}


PSprocdef(nam)                  /* define PS procedure to read image */
char  *nam;
{
        short  itab[128];
        register int  i;
                                /* assign code values */
        for (i = 0; i < 128; i++)       /* clear */
                itab[i] = -1;
        for (i = 1; i < 63; i++)        /* assign greys */
                itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM/devgam);
        itab[code[0]] = 0;              /* black is black */
        itab[code[63]] = 255;           /* and white is white */
        printf("/codetab [");
        for (i = 0; i < 128; i++) {
                if (!(i & 0xf))
                        putchar('\n');
                printf(" %3d", itab[i]);
        }
        printf("\n] def\n");
        printf("/nrept 0 def\n");
        printf("/readbyte { currentfile read not {stop} if } bind def\n");
        printf("/decode { codetab exch get } bind def\n");
        printf("/%s {\t%% scanbuffer\n", nam);
        printf("\t/scanline exch def\n");
        printf("\t{ 0 1 %d { scanline exch\n", xmax-1);
        printf("\t\tnrept 0 le\n");
        printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR);
        printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1);
        printf("\t\t\t\t\t\t/reptv readbyte decode def\n");
        printf("\t\t\t\t\t\treptv exit }\n");
        printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n");
        printf("\t\t\t\tifelse } loop }\n");
        printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n");
        printf("\t\tifelse put\n");
        printf("\t\t} for\n");
        printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n");
        printf("} bind def\n");
}


ra2ps()                         /* convert Radiance scanlines to 6-bit */
{
        register COLR   *scanin;
        int     y;
                                                /* allocate scanline */
        scanin = (COLR *)malloc(xmax*sizeof(COLR));
        if (scanin == NULL)
                quiterr("out of memory in ra2ps");
                                                /* convert image */
        for (y = ymax-1; y >= 0; y--) {
                if (freadcolrs(scanin, xmax, stdin) < 0)
                        quiterr("error reading Radiance picture");
                if (putprim == Cputprim || devgam != 1.) {
                        if (bradj)                      /* adjust exposure */
                                shiftcolrs(scanin, xmax, bradj);
                        colrs_gambs(scanin, xmax);      /* gamma compression */
                } else
                        normcolrs(scanin, xmax, bradj);
                if (docolor) {
                        (*putprim)(scanin, RED);
                        (*putprim)(scanin, GRN);
                        (*putprim)(scanin, BLU);
                } else
                        (*putprim)(scanin, GRY);
                if (ferror(stdout))
                        quiterr("error writing PostScript file");
        }
        putchar('\n');
                                                /* free scanline */
        free((char *)scanin);
}


int
Aputprim(scn, pri)              /* put out hex ASCII primary from scanline */
COLR    *scn;
int     pri;
{
        static char     hexdigit[] = "0123456789ABCDEF";
        static int      col = 0;
        register int    x, c;

        for (x = 0; x < xmax; x++) {
                if (pri == GRY)
                        c = normbright(scn[x]);
                else
                        c = scn[x][pri];
                if (c > 255) c = 255;
                putchar(hexdigit[c>>4]);
                putchar(hexdigit[c&0xf]);
                if ((col += 2) >= 72) {
                        putchar('\n');
                        col = 0;
                }
        }
}


int
Bputprim(scn, pri)              /* put out binary primary from scanline */
COLR    *scn;
int     pri;
{
        register int    x, c;

        for (x = 0; x < xmax; x++) {
                if (pri == GRY)
                        c = normbright(scn[x]);
                else
                        c = scn[x][pri];
                if (c > 255) c = 255;
                putchar(c);
        }
}


int
Cputprim(scn, pri)              /* put out compressed primary from scanline */
COLR    *scn;
int     pri;
{
        register int    c;
        register int    x;
        int     lastc, cnt;

        lastc = -1; cnt = 0;
        for (x = 0; x < xmax; x++) {
                if (pri == GRY)
                        c = normbright(scn[x]) + 2;
                else
                        c = scn[x][pri] + 2;
                if (c > 255) c = 255;
                c = code[c>>2];
                if (c == lastc && cnt < MAXRUN)
                        cnt++;
                else {
                        putrle(cnt, lastc);
                        lastc = c;
                        cnt = 1;
                }
        }
        putrle(cnt, lastc);
}


putrle(cnt, cod)                /* put out cnt of cod */
register int    cnt, cod;
{
        static int      col = 0;

        if (cnt >= MINRUN) {
                col += 3;
                putchar(RUNCHR);
                putchar(RSTRT-MINRUN+cnt);
                putchar(cod);
        } else {
                col += cnt;
                while (cnt-- > 0)
                        putchar(cod);
        }
        if (col >= 72) {
                putchar('\n');
                col = 0;
        }
}
Revision:	2.19
Committed:	Tue Sep 23 16:52:23 1997 UTC (28 years, 1 month ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 2.18:	+10 -6 lines
Log Message:	fixed gamma correction and added new pages sizes
#	User	Rev	Content
1	gregl	2.17	/* Copyright (c) 1997 Silicon Graphics, Inc. */
2	greg	2.1
3			#ifndef lint
4	gregl	2.17	static char SCCSid[] = "$SunId$ SGI";
5	greg	2.1	#endif
6
7			/*
8			* Radiance picture to PostScript file translator -- one way!
9			*/
10
11			#include <stdio.h>
12	greg	2.13	#include <math.h>
13	gregl	2.18	#include <ctype.h>
14	greg	2.6	#ifdef MSDOS
15			#include <fcntl.h>
16			#endif
17	greg	2.1	#include "color.h"
18
19	gregl	2.18	#define UPPER(c) ((c)&~0x20) /* ASCII trick */
20
21	gregl	2.17	#define CODE6GAM 1.47 /* gamma for 6-bit codes */
22			#define DEFDGAM 1.0 /* default device gamma */
23	greg	2.13
24	greg	2.11	#define GRY -1 /* artificial index for grey */
25
26	gregl	2.18	#define DEFMARG 0.5 /* default margin (inches) */
27			#define DEFWIDTH 8.5 /* default page width */
28			#define DEFHEIGHT 11 /* default page height */
29			#define HMARGIN (hmarg72) / horizontal margin */
30			#define VMARGIN (vmarg72) / vertical margin */
31			#define PWIDTH (width72-2HMARGIN) /* width of device */
32			#define PHEIGHT (height72-2VMARGIN) /* height of device */
33	greg	2.1
34	greg	2.9	#define RUNCHR '' / character to start rle */
35			#define MINRUN 4 /* minimum run-length */
36			#define RSTRT '!' /* character for MINRUN */
37			#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */
38
39	greg	2.1	char code[] = /* 6-bit code lookup table */
40			"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+";
41
42			int wrongformat = 0; /* input in wrong format? */
43	greg	2.6	double pixaspect = 1.0; /* pixel aspect ratio */
44	greg	2.1
45	gregl	2.17	double devgam = DEFDGAM; /* device gamma response */
46	gregl	2.18	double hmarg = DEFMARG,
47			vmarg = DEFMARG; /* horizontal and vertical margins */
48			double width = DEFWIDTH,
49			height = DEFHEIGHT; /* default paper width and height */
50	greg	2.11	int docolor = 0; /* produce color image? */
51	greg	2.1	int bradj = 0; /* brightness adjustment */
52	greg	2.4	int ncopies = 1; /* number of copies */
53	greg	2.1
54	greg	2.15	extern int Aputprim(), Bputprim(), Cputprim();
55
56			int (putprim)() = Aputprim; / function for writing scanline */
57
58	greg	2.1	char *progname;
59
60			int xmax, ymax;
61
62	greg	2.6	extern char *malloc();
63	gregl	2.18	extern double unit2inch();
64	greg	2.1
65	greg	2.6
66	greg	2.1	headline(s) /* check header line */
67			char *s;
68			{
69			char fmt[32];
70
71			if (isformat(s)) {
72			formatval(fmt, s);
73			wrongformat = strcmp(fmt, COLRFMT);
74			} else if (isaspect(s))
75			pixaspect *= aspectval(s);
76			}
77
78
79			main(argc, argv)
80			int argc;
81			char *argv[];
82			{
83			int i;
84	gregl	2.18	double d;
85	greg	2.1
86			progname = argv[0];
87
88			for (i = 1; i < argc; i++)
89			if (argv[i][0] == '-')
90			switch (argv[i][1]) {
91	greg	2.15	case 'b': /* produce b&w PostScript */
92			docolor = 0;
93			break;
94	greg	2.11	case 'c': /* produce color PostScript */
95	greg	2.15	docolor = 1;
96	greg	2.11	break;
97	greg	2.15	case 'A': /* standard ASCII encoding */
98			putprim = Aputprim;
99			break;
100			case 'B': /* standard binary encoding */
101			putprim = Bputprim;
102			break;
103			case 'C': /* compressed ASCII encoding */
104			putprim = Cputprim;
105			break;
106	gregl	2.18	case 'g': /* device gamma adjustment */
107	gregl	2.17	devgam = atof(argv[++i]);
108			break;
109	gregl	2.18	case 'p': /* paper size */
110			parsepaper(argv[++i]);
111			break;
112			case 'm': /* margin */
113			d = atof(argv[i+1]);
114			d *= unit2inch(argv[i+1]);
115			switch (argv[i][2]) {
116			case '\0':
117			hmarg = vmarg = d;
118			break;
119			case 'h':
120			hmarg = d;
121			break;
122			case 'v':
123			vmarg = d;
124			break;
125			default:
126			goto userr;
127			}
128			i++;
129			break;
130	greg	2.1	case 'e': /* exposure adjustment */
131			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
132			goto userr;
133			bradj = atoi(argv[++i]);
134			break;
135	greg	2.4	case 'n': /* number of copies */
136			ncopies = atoi(argv[++i]);
137			break;
138	greg	2.1	default:
139			goto userr;
140			}
141			else
142			break;
143
144			if (i < argc-2)
145			goto userr;
146			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
147			fprintf(stderr, "%s: can't open input \"%s\"\n",
148			progname, argv[i]);
149			exit(1);
150			}
151			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
152	greg	2.7	fprintf(stderr, "%s: can't open output \"%s\"\n",
153	greg	2.1	progname, argv[i+1]);
154			exit(1);
155			}
156	greg	2.6	#ifdef MSDOS
157			setmode(fileno(stdin), O_BINARY);
158			#endif
159	greg	2.1	/* get our header */
160			getheader(stdin, headline, NULL);
161			if (wrongformat \|\| fgetresolu(&xmax, &ymax, stdin) < 0)
162			quiterr("bad picture format");
163	greg	2.13	/* gamma compression */
164	greg	2.15	if (putprim == Cputprim)
165	gregl	2.19	setcolrgam(CODE6GAM);
166	gregl	2.17	else if (devgam != 1.)
167	gregl	2.19	setcolrgam(devgam);
168	greg	2.1	/* write header */
169			PSheader(i <= argc-1 ? argv[i] : "<stdin>");
170			/* convert file */
171			ra2ps();
172			/* write trailer */
173			PStrailer();
174			exit(0);
175			userr:
176	gregl	2.18	fprintf(stderr,
177			"Usage: %s [-b\|c][-A\|B\|C][-e +/-stops][-p paper][-m[h\|v] margin][-g gamma] [input [output]]\n",
178	greg	2.11	progname);
179	gregl	2.18	exit(1);
180			}
181
182
183			double
184			unit2inch(s) /* determine unit */
185			register char *s;
186			{
187			static struct unit {char n; float f} u[] = {
188			'i', 1.,
189			'm', 1./25.4,
190			'c', 1./2.54,
191			'\0' };
192			register struct unit *up;
193
194			while (s && !isalpha(s))
195			s++;
196			for (up = u; up->n; up++)
197			if (up->n == *s)
198			return(up->f);
199			return(1.);
200			}
201
202
203			int
204			matchid(name, id) /* see if name matches id (case insensitive) */
205			char *name;
206			register char *id;
207			{
208			register char *s = name;
209
210			while (*s) {
211			if (isalpha(*s)) {
212			if (!isalpha(id) \|\| UPPER(s) != UPPER(*id))
213			return(0);
214			} else if (s != id)
215			return(0);
216			s++; id++;
217			}
218			return(!id \|\| s-name >= 3); / substrings >= 3 chars OK */
219			}
220
221
222			parsepaper(ps) /* determine paper size from name */
223			char *ps;
224			{
225			static struct psize {char n[12]; float w,h;} p[] = {
226	gregl	2.19	"envelope", 4.12, 9.5,
227			"executive", 7.25, 10.5,
228	gregl	2.18	"letter", 8.5, 11.,
229	gregl	2.19	"lettersmall", 7.68, 10.16,
230	gregl	2.18	"legal", 8.5, 14.,
231			"monarch", 3.87, 7.5,
232	gregl	2.19	"statement", 5.5, 8.5,
233	gregl	2.18	"tabloid", 11., 17.,
234			"A3", 11.69, 16.54,
235			"A4", 8.27, 11.69,
236	gregl	2.19	"A4small", 7.47, 10.85,
237	gregl	2.18	"A5", 6.00, 8.27,
238			"A6", 4.13, 6.00,
239			"B4", 10.12, 14.33,
240			"B5", 7.17, 10.12,
241			"C5", 6.38, 9.01,
242			"C6", 4.49, 6.38,
243	gregl	2.19	"DL", 4.33, 8.66,
244	gregl	2.18	"hagaki", 3.94, 5.83,
245			"" };
246			register struct psize *pp;
247			register char *s = ps;
248			double d;
249
250			if (isdigit(s)) { / check for WWxHH specification */
251			width = atof(s);
252			while (s && !isalpha(s))
253			s++;
254			d = unit2inch(s);
255			height = atof(++s);
256			width *= d;
257			height *= d;
258			if (width >= 1. & height >= 1.)
259			return;
260			} else /* check for match to standard size */
261			for (pp = p; pp->n[0]; pp++)
262			if (matchid(s, pp->n)) {
263			width = pp->w;
264			height = pp->h;
265			return;
266			}
267			fprintf(stderr, "%s: unknown paper size \"%s\" -- known sizes:\n",
268			progname, ps);
269			fprintf(stderr, "_Name________Width_Height_(inches)\n");
270			for (pp = p; pp->n[0]; pp++)
271			fprintf(stderr, "%-11s %5.2f %5.2f\n", pp->n, pp->w, pp->h);
272	gregl	2.19	fprintf(stderr, "Or use WWxHH size specification\n");
273	greg	2.1	exit(1);
274			}
275
276
277			quiterr(err) /* print message and exit */
278			char *err;
279			{
280			if (err != NULL) {
281			fprintf(stderr, "%s: %s\n", progname, err);
282			exit(1);
283			}
284			exit(0);
285			}
286
287
288			PSheader(name) /* print PostScript header */
289			char *name;
290			{
291	greg	2.15	char *rstr;
292	greg	2.1	int landscape = 0;
293	greg	2.6	double pwidth, pheight;
294			double iwidth, iheight;
295	greg	2.10	/* EPS comments */
296	greg	2.11	puts("%!PS-Adobe-2.0 EPSF-2.0");
297	greg	2.1	printf("%%%%Title: %s\n", name);
298	greg	2.10	printf("%%%%Creator: %s = %s\n", progname, SCCSid);
299	greg	2.4	printf("%%%%Pages: %d\n", ncopies);
300	greg	2.1	if (landscape = xmax > pixaspect*ymax)
301	greg	2.10	puts("%%Orientation: Landscape");
302	greg	2.1	else
303	greg	2.10	puts("%%Orientation: Portrait");
304	greg	2.1	if (PWIDTH > PHEIGHT ^ landscape) {
305			pwidth = PHEIGHT;
306			pheight = PWIDTH;
307			} else {
308			pwidth = PWIDTH;
309			pheight = PHEIGHT;
310			}
311			if (pheight/pwidth > pixaspect*ymax/xmax) {
312	greg	2.2	iwidth = pwidth;
313			iheight = pwidthpixaspectymax/xmax;
314	greg	2.1	} else {
315	greg	2.2	iheight = pheight;
316			iwidth = pheightxmax/(pixaspectymax);
317	greg	2.1	}
318	greg	2.10	if (pwidth == PHEIGHT)
319			printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n",
320			HMARGIN+(pheight-iheight)*.5,
321			VMARGIN+(pwidth-iwidth)*.5,
322			HMARGIN+(pheight-iheight)*.5+iheight,
323			VMARGIN+(pwidth-iwidth)*.5+iwidth);
324			else
325			printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n",
326			HMARGIN+(pwidth-iwidth)*.5,
327			VMARGIN+(pheight-iheight)*.5,
328			HMARGIN+(pwidth-iwidth)*.5+iwidth,
329			VMARGIN+(pheight-iheight)*.5+iheight);
330			puts("%%EndComments");
331	greg	2.13	puts("gsave save");
332	greg	2.15	puts("17 dict begin");
333	greg	2.10	/* define image reader */
334	greg	2.11	if (docolor) {
335			printf("/redline %d string def\n", xmax);
336			printf("/grnline %d string def\n", xmax);
337			printf("/bluline %d string def\n", xmax);
338	greg	2.15	} else
339			printf("/gryline %d string def\n", xmax);
340			/* use compressed encoding? */
341			if (putprim == Cputprim)
342			PSprocdef("read6bitRLE");
343	greg	2.10	/* set up transformation matrix */
344			printf("%f %f translate\n", HMARGIN, VMARGIN);
345			if (pwidth == PHEIGHT) {
346	greg	2.14	printf("%f 0 translate\n", PWIDTH);
347			puts("90 rotate");
348	greg	2.10	}
349	greg	2.2	printf("%f %f translate\n", (pwidth-iwidth).5, (pheight-iheight).5);
350			printf("%f %f scale\n", iwidth, iheight);
351	greg	2.12	puts("%%EndProlog");
352	greg	2.3	/* start image procedure */
353	greg	2.15	printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax);
354			if (putprim == Cputprim) {
355			if (docolor) {
356	greg	2.16	puts("{redline read6bitRLE}");
357			puts("{grnline read6bitRLE}");
358			puts("{bluline read6bitRLE}");
359			puts("true 3 colorimage");
360	greg	2.15	} else
361			puts("{gryline read6bitRLE} image");
362			} else {
363			rstr = putprim==Aputprim ? "readhexstring" : "readstring";
364			if (docolor) {
365			printf("{currentfile redline %s pop}\n", rstr);
366			printf("{currentfile grnline %s pop}\n", rstr);
367			printf("{currentfile bluline %s pop}\n", rstr);
368			puts("true 3 colorimage");
369			} else
370			printf("{currentfile gryline %s pop} image\n", rstr);
371			}
372	greg	2.1	}
373
374
375			PStrailer() /* print PostScript trailer */
376			{
377			puts("%%Trailer");
378	greg	2.4	if (ncopies > 1)
379			printf("/#copies %d def\n", ncopies);
380			puts("showpage");
381	greg	2.1	puts("end");
382	greg	2.13	puts("restore grestore");
383	greg	2.1	puts("%%EOF");
384			}
385
386
387	greg	2.15	PSprocdef(nam) /* define PS procedure to read image */
388			char *nam;
389	greg	2.1	{
390			short itab[128];
391			register int i;
392	greg	2.5	/* assign code values */
393			for (i = 0; i < 128; i++) /* clear */
394	greg	2.1	itab[i] = -1;
395	greg	2.5	for (i = 1; i < 63; i++) /* assign greys */
396	gregl	2.19	itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM/devgam);
397	greg	2.5	itab[code[0]] = 0; /* black is black */
398			itab[code[63]] = 255; /* and white is white */
399	greg	2.9	printf("/codetab [");
400	greg	2.1	for (i = 0; i < 128; i++) {
401			if (!(i & 0xf))
402			putchar('\n');
403			printf(" %3d", itab[i]);
404			}
405			printf("\n] def\n");
406	greg	2.9	printf("/nrept 0 def\n");
407	greg	2.11	printf("/readbyte { currentfile read not {stop} if } bind def\n");
408			printf("/decode { codetab exch get } bind def\n");
409			printf("/%s {\t%% scanbuffer\n", nam);
410			printf("\t/scanline exch def\n");
411	greg	2.1	printf("\t{ 0 1 %d { scanline exch\n", xmax-1);
412	greg	2.9	printf("\t\tnrept 0 le\n");
413			printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR);
414			printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1);
415			printf("\t\t\t\t\t\t/reptv readbyte decode def\n");
416			printf("\t\t\t\t\t\treptv exit }\n");
417			printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n");
418			printf("\t\t\t\tifelse } loop }\n");
419			printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n");
420			printf("\t\tifelse put\n");
421			printf("\t\t} for\n");
422			printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n");
423	greg	2.8	printf("} bind def\n");
424	greg	2.1	}
425
426
427			ra2ps() /* convert Radiance scanlines to 6-bit */
428			{
429	greg	2.9	register COLR *scanin;
430	greg	2.1	int y;
431			/* allocate scanline */
432			scanin = (COLR )malloc(xmaxsizeof(COLR));
433			if (scanin == NULL)
434			quiterr("out of memory in ra2ps");
435			/* convert image */
436			for (y = ymax-1; y >= 0; y--) {
437			if (freadcolrs(scanin, xmax, stdin) < 0)
438			quiterr("error reading Radiance picture");
439	gregl	2.17	if (putprim == Cputprim \|\| devgam != 1.) {
440	greg	2.15	if (bradj) /* adjust exposure */
441			shiftcolrs(scanin, xmax, bradj);
442			colrs_gambs(scanin, xmax); /* gamma compression */
443			} else
444			normcolrs(scanin, xmax, bradj);
445	greg	2.11	if (docolor) {
446	greg	2.15	(*putprim)(scanin, RED);
447			(*putprim)(scanin, GRN);
448			(*putprim)(scanin, BLU);
449	greg	2.11	} else
450	greg	2.15	(*putprim)(scanin, GRY);
451	greg	2.1	if (ferror(stdout))
452			quiterr("error writing PostScript file");
453			}
454			putchar('\n');
455			/* free scanline */
456			free((char *)scanin);
457	greg	2.11	}
458
459
460	greg	2.15	int
461			Aputprim(scn, pri) /* put out hex ASCII primary from scanline */
462			COLR *scn;
463			int pri;
464			{
465			static char hexdigit[] = "0123456789ABCDEF";
466			static int col = 0;
467			register int x, c;
468
469			for (x = 0; x < xmax; x++) {
470			if (pri == GRY)
471			c = normbright(scn[x]);
472			else
473			c = scn[x][pri];
474			if (c > 255) c = 255;
475			putchar(hexdigit[c>>4]);
476			putchar(hexdigit[c&0xf]);
477			if ((col += 2) >= 72) {
478			putchar('\n');
479			col = 0;
480			}
481			}
482			}
483
484
485			int
486			Bputprim(scn, pri) /* put out binary primary from scanline */
487			COLR *scn;
488			int pri;
489			{
490			register int x, c;
491
492			for (x = 0; x < xmax; x++) {
493			if (pri == GRY)
494			c = normbright(scn[x]);
495			else
496			c = scn[x][pri];
497			if (c > 255) c = 255;
498			putchar(c);
499			}
500			}
501
502
503			int
504			Cputprim(scn, pri) /* put out compressed primary from scanline */
505	greg	2.11	COLR *scn;
506			int pri;
507			{
508			register int c;
509			register int x;
510			int lastc, cnt;
511
512			lastc = -1; cnt = 0;
513			for (x = 0; x < xmax; x++) {
514			if (pri == GRY)
515			c = normbright(scn[x]) + 2;
516			else
517			c = scn[x][pri] + 2;
518			if (c > 255) c = 255;
519			c = code[c>>2];
520			if (c == lastc && cnt < MAXRUN)
521			cnt++;
522			else {
523			putrle(cnt, lastc);
524			lastc = c;
525			cnt = 1;
526			}
527			}
528			putrle(cnt, lastc);
529	greg	2.9	}
530
531
532			putrle(cnt, cod) /* put out cnt of cod */
533			register int cnt, cod;
534			{
535			static int col = 0;
536
537			if (cnt >= MINRUN) {
538			col += 3;
539			putchar(RUNCHR);
540			putchar(RSTRT-MINRUN+cnt);
541			putchar(cod);
542			} else {
543			col += cnt;
544			while (cnt-- > 0)
545			putchar(cod);
546			}
547			if (col >= 72) {
548			putchar('\n');
549			col = 0;
550			}
551	greg	2.1	}