src/px/ra_ps.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_ps.c,v 2.33 2024/10/04 01:53:45 greg Exp $";
#endif
/*
 *  Radiance picture to PostScript file translator -- one way!
 */

#include  <math.h>
#include  <ctype.h>

#include  "platform.h"
#include  "paths.h"
#include  "rtio.h"
#include  "color.h"
#include  "resolu.h"

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

#define CODE6GAM        1.47                    /* gamma for 6-bit codes */
#define DEFGGAM         1.0                     /* greyscale device gamma */
#define DEFCGAM         1.8                     /* color 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 = 0.;                    /* device gamma response */
double  hmarg = DEFMARG,
        vmarg = DEFMARG;                /* horizontal and vertical margins */
double  width = DEFWIDTH,
        height = DEFHEIGHT;             /* default paper width and height */
double  dpi = 0;                        /* print density (0 if unknown) */
int  docolor = 1;                       /* produce color image? */
int  bradj = 0;                         /* brightness adjustment */
int  ncopies = 1;                       /* number of copies */

int  xmax, ymax;                        /* input image dimensions */

typedef void putprimf_t(COLR *scn, int pri);

static gethfunc headline;
static putprimf_t Aputprim, Bputprim, Cputprim;

static double unit2inch(char *s);
static int matchid(char *name, char *id);
static void parsepaper(char *ps);
static void quiterr(char *err);
static void PSheader(int ac, char **av);
static void PStrailer(void);
static void PSprocdef(char *nam);
static void ra2ps(void);
static void putrle(int cnt, int cod);


putprimf_t *putprim = Aputprim;         /* function for writing scanline */


static int
headline(               /* check header line */
        char    *s,
        void    *p
)
{
        char  fmt[MAXFMTLEN];

        if (formatval(fmt, s))
                wrongformat = strcmp(fmt, COLRFMT) && strcmp(fmt, SPECFMT);
        else if (isaspect(s))
                pixaspect *= aspectval(s);
        else if (isncomp(s))
                NCSAMP = ncompval(s);
        else if (iswlsplit(s))
                wlsplitval(WLPART, s);
        return(0);
}

int
main(int  argc, char  *argv[])
{
        int  i;
        double  d;
        
        fixargv0(argv[0]);              /* assigns progname */

        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 'd':               /* print density */
                                dpi = atof(argv[++i]);
                                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);
        }
        SET_FILE_BINARY(stdin);
                                /* get our header */
        getheader(stdin, headline, NULL);
        if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0)
                quiterr("bad picture format");
                                /* gamma compression */
        if (devgam <= 0.05)
                devgam = docolor ? DEFCGAM : DEFGGAM;
        if (putprim == Cputprim)
                setcolrgam(CODE6GAM);
        else if (devgam != 1.)
                setcolrgam(devgam);
                                /* write header */
        PSheader(argc, argv);
                                /* 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][-d dpi][-g gamma] [input [output]]\n",
                        progname);
        exit(1);
}


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

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


static int
matchid(        /* see if name matches id (case insensitive) */
        char    *name,
        char    *id
)
{
        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 */
}


static void
parsepaper(             /* 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},
                {"",0.0,0.0} };
        struct psize    *pp;
        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);
}


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


static void
PSheader(               /* print PostScript header */
        int  ac,
        char  **av
)
{
        char  *rstr;
        int  landscape, rotate, n;
        double  pwidth, pheight;
        double  iwidth, iheight;
                                        /* EPS comments */
        puts("%!PS-Adobe-2.0 EPSF-2.0");
        printf("%%%%Title: "); printargs(ac, av, stdout);
        printf("%%%%Creator: %s\n", progname);
        printf("%%%%Pages: %d\n", ncopies);
        if ( (landscape = xmax > pixaspect*ymax) )
                puts("%%Orientation: Landscape");
        else
                puts("%%Orientation: Portrait");
        if ( (rotate = (PWIDTH > PHEIGHT) ^ landscape) ) {
                pwidth = PHEIGHT;
                pheight = PWIDTH;
        } else {
                pwidth = PWIDTH;
                pheight = PHEIGHT;
        }
        if (dpi > 100 && (pixaspect >= 0.99) & (pixaspect <= 1.01))
                if (pheight/pwidth > ymax/xmax) {
                        n = pwidth*dpi/xmax;    /* floor */
                        iwidth = n > 0 ? (double)(n*xmax)/dpi : pwidth;
                        iheight = iwidth*ymax/xmax;
                } else {
                        n = pheight*dpi/ymax;   /* floor */
                        iheight = n > 0 ? (double)(n*ymax)/dpi : pheight;
                        iwidth = iheight*xmax/ymax;
                }
        else
                if (pheight/pwidth > pixaspect*ymax/xmax) {
                        iwidth = pwidth;
                        iheight = iwidth*pixaspect*ymax/xmax;
                } else {
                        iheight = pheight;
                        iwidth = iheight*xmax/(pixaspect*ymax);
                }
        if (rotate)
                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 (rotate) {
                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);
        }
}


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


static void
PSprocdef(                      /* define PS procedure to read image */
        char  *nam
)
{
        short  itab[128];
        int  i;
                                /* assign code values */
        for (i = 0; i < 128; i++)       /* clear */
                itab[i] = -1;
        for (i = 1; i < 63; i++)        /* assign greys */
                itab[(int)code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM/devgam);
        itab[(int)code[0]] = 0;         /* black is black */
        itab[(int)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");
}


static void
ra2ps(void)                             /* convert Radiance scanlines to 6-bit */
{
        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 (fread2colrs(scanin, xmax, stdin, NCSAMP, WLPART) < 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((void *)scanin);
}


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


static void
Bputprim(               /* put out binary primary from scanline */
        COLR    *scn,
        int     pri
)
{
        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);
        }
}


static void
Cputprim(               /* put out compressed primary from scanline */
        COLR    *scn,
        int     pri
)
{
        int     c;
        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);
}


static void
putrle(         /* put out cnt of cod */
        int     cnt,
        int     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:	2.34
Committed:	Fri Jun 6 19:11:21 2025 UTC (4 months, 3 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.33:	+2 -3 lines
Log Message:	refactor: Making use of printargs() more consistent with fixargv0()
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.34	static const char RCSid[] = "$Id: ra_ps.c,v 2.33 2024/10/04 01:53:45 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Radiance picture to PostScript file translator -- one way!
6			*/
7
8	greg	2.13	#include <math.h>
9	gregl	2.18	#include <ctype.h>
10	schorsch	2.25
11			#include "platform.h"
12	greg	2.32	#include "paths.h"
13	greg	2.29	#include "rtio.h"
14	greg	2.1	#include "color.h"
15	schorsch	2.27	#include "resolu.h"
16	greg	2.1
17	gregl	2.18	#define UPPER(c) ((c)&~0x20) /* ASCII trick */
18
19	gregl	2.17	#define CODE6GAM 1.47 /* gamma for 6-bit codes */
20	gwlarson	2.21	#define DEFGGAM 1.0 /* greyscale device gamma */
21			#define DEFCGAM 1.8 /* color device gamma */
22	greg	2.13
23	greg	2.11	#define GRY -1 /* artificial index for grey */
24
25	gregl	2.18	#define DEFMARG 0.5 /* default margin (inches) */
26			#define DEFWIDTH 8.5 /* default page width */
27			#define DEFHEIGHT 11 /* default page height */
28			#define HMARGIN (hmarg72) / horizontal margin */
29			#define VMARGIN (vmarg72) / vertical margin */
30			#define PWIDTH (width72-2HMARGIN) /* width of device */
31			#define PHEIGHT (height72-2VMARGIN) /* height of device */
32	greg	2.1
33	greg	2.9	#define RUNCHR '' / character to start rle */
34			#define MINRUN 4 /* minimum run-length */
35			#define RSTRT '!' /* character for MINRUN */
36			#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */
37
38	greg	2.1	char code[] = /* 6-bit code lookup table */
39			"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+";
40
41			int wrongformat = 0; /* input in wrong format? */
42	greg	2.6	double pixaspect = 1.0; /* pixel aspect ratio */
43	greg	2.1
44	gwlarson	2.21	double devgam = 0.; /* device gamma response */
45	gregl	2.18	double hmarg = DEFMARG,
46			vmarg = DEFMARG; /* horizontal and vertical margins */
47			double width = DEFWIDTH,
48			height = DEFHEIGHT; /* default paper width and height */
49	gregl	2.20	double dpi = 0; /* print density (0 if unknown) */
50	gwlarson	2.21	int docolor = 1; /* 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	schorsch	2.28	int xmax, ymax; /* input image dimensions */
55	greg	2.15
56	schorsch	2.28	typedef void putprimf_t(COLR *scn, int pri);
57	greg	2.15
58	schorsch	2.28	static gethfunc headline;
59			static putprimf_t Aputprim, Bputprim, Cputprim;
60	greg	2.1
61	greg	2.32	static double unit2inch(char *s);
62	schorsch	2.28	static int matchid(char name, char id);
63			static void parsepaper(char *ps);
64			static void quiterr(char *err);
65			static void PSheader(int ac, char **av);
66			static void PStrailer(void);
67			static void PSprocdef(char *nam);
68			static void ra2ps(void);
69			static void putrle(int cnt, int cod);
70	greg	2.1
71
72	schorsch	2.28	putprimf_t putprim = Aputprim; / function for writing scanline */
73	greg	2.6
74	schorsch	2.27
75			static int
76			headline( /* check header line */
77			char *s,
78			void *p
79			)
80	greg	2.1	{
81	greg	2.30	char fmt[MAXFMTLEN];
82	greg	2.1
83	greg	2.33	if (formatval(fmt, s))
84			wrongformat = strcmp(fmt, COLRFMT) && strcmp(fmt, SPECFMT);
85			else if (isaspect(s))
86	greg	2.1	pixaspect *= aspectval(s);
87	greg	2.33	else if (isncomp(s))
88			NCSAMP = ncompval(s);
89			else if (iswlsplit(s))
90			wlsplitval(WLPART, s);
91	gwlarson	2.22	return(0);
92	greg	2.1	}
93
94	schorsch	2.28	int
95			main(int argc, char *argv[])
96	greg	2.1	{
97			int i;
98	gregl	2.18	double d;
99	greg	2.1
100	greg	2.34	fixargv0(argv[0]); /* assigns progname */
101	greg	2.1
102			for (i = 1; i < argc; i++)
103			if (argv[i][0] == '-')
104			switch (argv[i][1]) {
105	greg	2.15	case 'b': /* produce b&w PostScript */
106			docolor = 0;
107			break;
108	greg	2.11	case 'c': /* produce color PostScript */
109	greg	2.15	docolor = 1;
110	greg	2.11	break;
111	greg	2.15	case 'A': /* standard ASCII encoding */
112			putprim = Aputprim;
113			break;
114			case 'B': /* standard binary encoding */
115			putprim = Bputprim;
116			break;
117			case 'C': /* compressed ASCII encoding */
118			putprim = Cputprim;
119			break;
120	gregl	2.20	case 'd': /* print density */
121			dpi = atof(argv[++i]);
122			break;
123	gregl	2.18	case 'g': /* device gamma adjustment */
124	gregl	2.17	devgam = atof(argv[++i]);
125			break;
126	gregl	2.18	case 'p': /* paper size */
127			parsepaper(argv[++i]);
128			break;
129			case 'm': /* margin */
130			d = atof(argv[i+1]);
131			d *= unit2inch(argv[i+1]);
132			switch (argv[i][2]) {
133			case '\0':
134			hmarg = vmarg = d;
135			break;
136			case 'h':
137			hmarg = d;
138			break;
139			case 'v':
140			vmarg = d;
141			break;
142			default:
143			goto userr;
144			}
145			i++;
146			break;
147	greg	2.1	case 'e': /* exposure adjustment */
148			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
149			goto userr;
150			bradj = atoi(argv[++i]);
151			break;
152	greg	2.4	case 'n': /* number of copies */
153			ncopies = atoi(argv[++i]);
154			break;
155	greg	2.1	default:
156			goto userr;
157			}
158			else
159			break;
160
161			if (i < argc-2)
162			goto userr;
163			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
164			fprintf(stderr, "%s: can't open input \"%s\"\n",
165			progname, argv[i]);
166			exit(1);
167			}
168			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
169	greg	2.7	fprintf(stderr, "%s: can't open output \"%s\"\n",
170	greg	2.1	progname, argv[i+1]);
171			exit(1);
172			}
173	schorsch	2.25	SET_FILE_BINARY(stdin);
174	greg	2.1	/* get our header */
175			getheader(stdin, headline, NULL);
176			if (wrongformat \|\| fgetresolu(&xmax, &ymax, stdin) < 0)
177			quiterr("bad picture format");
178	greg	2.13	/* gamma compression */
179	gwlarson	2.21	if (devgam <= 0.05)
180			devgam = docolor ? DEFCGAM : DEFGGAM;
181	greg	2.15	if (putprim == Cputprim)
182	gregl	2.19	setcolrgam(CODE6GAM);
183	gregl	2.17	else if (devgam != 1.)
184	gregl	2.19	setcolrgam(devgam);
185	greg	2.1	/* write header */
186	gwlarson	2.21	PSheader(argc, argv);
187	greg	2.1	/* convert file */
188			ra2ps();
189			/* write trailer */
190			PStrailer();
191			exit(0);
192			userr:
193	gregl	2.18	fprintf(stderr,
194	gregl	2.20	"Usage: %s [-b\|c][-A\|B\|C][-e +/-stops][-p paper][-m[h\|v] margin][-d dpi][-g gamma] [input [output]]\n",
195	greg	2.11	progname);
196	gregl	2.18	exit(1);
197			}
198
199
200	schorsch	2.28	static double
201			unit2inch( /* determine unit */
202	greg	2.32	char *s
203	schorsch	2.28	)
204	gregl	2.18	{
205	gwlarson	2.23	static struct unit {char n; float f;} u[] = {
206	schorsch	2.27	{'i', 1.},
207			{'m', 1./25.4},
208			{'c', 1./2.54},
209			{'\0',0} };
210	greg	2.32	struct unit *up;
211	gregl	2.18
212			while (s && !isalpha(s))
213			s++;
214			for (up = u; up->n; up++)
215			if (up->n == *s)
216			return(up->f);
217			return(1.);
218			}
219
220
221	schorsch	2.28	static int
222			matchid( /* see if name matches id (case insensitive) */
223			char *name,
224	greg	2.32	char *id
225	schorsch	2.28	)
226	gregl	2.18	{
227	greg	2.32	char *s = name;
228	gregl	2.18
229			while (*s) {
230			if (isalpha(*s)) {
231			if (!isalpha(id) \|\| UPPER(s) != UPPER(*id))
232			return(0);
233			} else if (s != id)
234			return(0);
235			s++; id++;
236			}
237			return(!id \|\| s-name >= 3); / substrings >= 3 chars OK */
238			}
239
240
241	schorsch	2.28	static void
242			parsepaper( /* determine paper size from name */
243			char *ps
244			)
245	gregl	2.18	{
246			static struct psize {char n[12]; float w,h;} p[] = {
247	schorsch	2.27	{"envelope", 4.12, 9.5},
248			{"executive", 7.25, 10.5},
249			{"letter", 8.5, 11.},
250			{"lettersmall", 7.68, 10.16},
251			{"legal", 8.5, 14.},
252			{"monarch", 3.87, 7.5},
253			{"statement", 5.5, 8.5},
254			{"tabloid", 11., 17.},
255			{"A3", 11.69, 16.54},
256			{"A4", 8.27, 11.69},
257			{"A4small", 7.47, 10.85},
258			{"A5", 6.00, 8.27},
259			{"A6", 4.13, 6.00},
260			{"B4", 10.12, 14.33},
261			{"B5", 7.17, 10.12},
262			{"C5", 6.38, 9.01},
263			{"C6", 4.49, 6.38},
264			{"DL", 4.33, 8.66},
265			{"hagaki", 3.94, 5.83},
266			{"",0.0,0.0} };
267	greg	2.32	struct psize *pp;
268			char *s = ps;
269	gregl	2.18	double d;
270
271			if (isdigit(s)) { / check for WWxHH specification */
272			width = atof(s);
273			while (s && !isalpha(s))
274			s++;
275			d = unit2inch(s);
276			height = atof(++s);
277			width *= d;
278			height *= d;
279	schorsch	2.26	if ((width >= 1.) & (height >= 1.))
280	gregl	2.18	return;
281			} else /* check for match to standard size */
282			for (pp = p; pp->n[0]; pp++)
283			if (matchid(s, pp->n)) {
284			width = pp->w;
285			height = pp->h;
286			return;
287			}
288			fprintf(stderr, "%s: unknown paper size \"%s\" -- known sizes:\n",
289			progname, ps);
290			fprintf(stderr, "_Name________Width_Height_(inches)\n");
291			for (pp = p; pp->n[0]; pp++)
292			fprintf(stderr, "%-11s %5.2f %5.2f\n", pp->n, pp->w, pp->h);
293	gregl	2.19	fprintf(stderr, "Or use WWxHH size specification\n");
294	greg	2.1	exit(1);
295			}
296
297
298	schorsch	2.28	static void
299			quiterr( /* print message and exit */
300			char *err
301			)
302	greg	2.1	{
303			if (err != NULL) {
304			fprintf(stderr, "%s: %s\n", progname, err);
305			exit(1);
306			}
307			exit(0);
308			}
309
310
311	schorsch	2.28	static void
312			PSheader( /* print PostScript header */
313			int ac,
314			char **av
315			)
316	greg	2.1	{
317	greg	2.15	char *rstr;
318	gregl	2.20	int landscape, rotate, n;
319	greg	2.6	double pwidth, pheight;
320			double iwidth, iheight;
321	greg	2.10	/* EPS comments */
322	greg	2.11	puts("%!PS-Adobe-2.0 EPSF-2.0");
323	gwlarson	2.21	printf("%%%%Title: "); printargs(ac, av, stdout);
324	greg	2.24	printf("%%%%Creator: %s\n", progname);
325	greg	2.4	printf("%%%%Pages: %d\n", ncopies);
326	schorsch	2.26	if ( (landscape = xmax > pixaspect*ymax) )
327	greg	2.10	puts("%%Orientation: Landscape");
328	greg	2.1	else
329	greg	2.10	puts("%%Orientation: Portrait");
330	schorsch	2.26	if ( (rotate = (PWIDTH > PHEIGHT) ^ landscape) ) {
331	greg	2.1	pwidth = PHEIGHT;
332			pheight = PWIDTH;
333			} else {
334			pwidth = PWIDTH;
335			pheight = PHEIGHT;
336			}
337	schorsch	2.26	if (dpi > 100 && (pixaspect >= 0.99) & (pixaspect <= 1.01))
338	gregl	2.20	if (pheight/pwidth > ymax/xmax) {
339			n = pwidthdpi/xmax; / floor */
340			iwidth = n > 0 ? (double)(n*xmax)/dpi : pwidth;
341			iheight = iwidth*ymax/xmax;
342			} else {
343			n = pheightdpi/ymax; / floor */
344			iheight = n > 0 ? (double)(n*ymax)/dpi : pheight;
345			iwidth = iheight*xmax/ymax;
346			}
347			else
348			if (pheight/pwidth > pixaspect*ymax/xmax) {
349			iwidth = pwidth;
350			iheight = iwidthpixaspectymax/xmax;
351			} else {
352			iheight = pheight;
353			iwidth = iheightxmax/(pixaspectymax);
354			}
355			if (rotate)
356	greg	2.10	printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n",
357			HMARGIN+(pheight-iheight)*.5,
358			VMARGIN+(pwidth-iwidth)*.5,
359			HMARGIN+(pheight-iheight)*.5+iheight,
360			VMARGIN+(pwidth-iwidth)*.5+iwidth);
361			else
362			printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n",
363			HMARGIN+(pwidth-iwidth)*.5,
364			VMARGIN+(pheight-iheight)*.5,
365			HMARGIN+(pwidth-iwidth)*.5+iwidth,
366			VMARGIN+(pheight-iheight)*.5+iheight);
367			puts("%%EndComments");
368	greg	2.13	puts("gsave save");
369	greg	2.15	puts("17 dict begin");
370	greg	2.10	/* define image reader */
371	greg	2.11	if (docolor) {
372			printf("/redline %d string def\n", xmax);
373			printf("/grnline %d string def\n", xmax);
374			printf("/bluline %d string def\n", xmax);
375	greg	2.15	} else
376			printf("/gryline %d string def\n", xmax);
377			/* use compressed encoding? */
378			if (putprim == Cputprim)
379			PSprocdef("read6bitRLE");
380	greg	2.10	/* set up transformation matrix */
381			printf("%f %f translate\n", HMARGIN, VMARGIN);
382	gregl	2.20	if (rotate) {
383	greg	2.14	printf("%f 0 translate\n", PWIDTH);
384			puts("90 rotate");
385	greg	2.10	}
386	greg	2.2	printf("%f %f translate\n", (pwidth-iwidth).5, (pheight-iheight).5);
387			printf("%f %f scale\n", iwidth, iheight);
388	greg	2.12	puts("%%EndProlog");
389	greg	2.3	/* start image procedure */
390	greg	2.15	printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax);
391			if (putprim == Cputprim) {
392			if (docolor) {
393	greg	2.16	puts("{redline read6bitRLE}");
394			puts("{grnline read6bitRLE}");
395			puts("{bluline read6bitRLE}");
396			puts("true 3 colorimage");
397	greg	2.15	} else
398			puts("{gryline read6bitRLE} image");
399			} else {
400			rstr = putprim==Aputprim ? "readhexstring" : "readstring";
401			if (docolor) {
402			printf("{currentfile redline %s pop}\n", rstr);
403			printf("{currentfile grnline %s pop}\n", rstr);
404			printf("{currentfile bluline %s pop}\n", rstr);
405			puts("true 3 colorimage");
406			} else
407			printf("{currentfile gryline %s pop} image\n", rstr);
408			}
409	greg	2.1	}
410
411
412	schorsch	2.28	static void
413			PStrailer(void) /* print PostScript trailer */
414	greg	2.1	{
415			puts("%%Trailer");
416	greg	2.4	if (ncopies > 1)
417			printf("/#copies %d def\n", ncopies);
418			puts("showpage");
419	greg	2.1	puts("end");
420	greg	2.13	puts("restore grestore");
421	greg	2.1	puts("%%EOF");
422			}
423
424
425	schorsch	2.28	static void
426			PSprocdef( /* define PS procedure to read image */
427			char *nam
428			)
429	greg	2.1	{
430			short itab[128];
431	greg	2.32	int i;
432	greg	2.5	/* assign code values */
433			for (i = 0; i < 128; i++) /* clear */
434	greg	2.1	itab[i] = -1;
435	greg	2.5	for (i = 1; i < 63; i++) /* assign greys */
436	schorsch	2.28	itab[(int)code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM/devgam);
437			itab[(int)code[0]] = 0; /* black is black */
438			itab[(int)code[63]] = 255; /* and white is white */
439	greg	2.9	printf("/codetab [");
440	greg	2.1	for (i = 0; i < 128; i++) {
441			if (!(i & 0xf))
442			putchar('\n');
443			printf(" %3d", itab[i]);
444			}
445			printf("\n] def\n");
446	greg	2.9	printf("/nrept 0 def\n");
447	greg	2.11	printf("/readbyte { currentfile read not {stop} if } bind def\n");
448			printf("/decode { codetab exch get } bind def\n");
449			printf("/%s {\t%% scanbuffer\n", nam);
450			printf("\t/scanline exch def\n");
451	greg	2.1	printf("\t{ 0 1 %d { scanline exch\n", xmax-1);
452	greg	2.9	printf("\t\tnrept 0 le\n");
453			printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR);
454			printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1);
455			printf("\t\t\t\t\t\t/reptv readbyte decode def\n");
456			printf("\t\t\t\t\t\treptv exit }\n");
457			printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n");
458			printf("\t\t\t\tifelse } loop }\n");
459			printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n");
460			printf("\t\tifelse put\n");
461			printf("\t\t} for\n");
462			printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n");
463	greg	2.8	printf("} bind def\n");
464	greg	2.1	}
465
466
467	schorsch	2.28	static void
468			ra2ps(void) /* convert Radiance scanlines to 6-bit */
469	greg	2.1	{
470	greg	2.32	COLR *scanin;
471	greg	2.1	int y;
472			/* allocate scanline */
473			scanin = (COLR )malloc(xmaxsizeof(COLR));
474			if (scanin == NULL)
475			quiterr("out of memory in ra2ps");
476			/* convert image */
477			for (y = ymax-1; y >= 0; y--) {
478	greg	2.33	if (fread2colrs(scanin, xmax, stdin, NCSAMP, WLPART) < 0)
479	greg	2.1	quiterr("error reading Radiance picture");
480	greg	2.33	if ((putprim == Cputprim) \| (devgam != 1.)) {
481	greg	2.15	if (bradj) /* adjust exposure */
482			shiftcolrs(scanin, xmax, bradj);
483			colrs_gambs(scanin, xmax); /* gamma compression */
484			} else
485			normcolrs(scanin, xmax, bradj);
486	greg	2.11	if (docolor) {
487	greg	2.15	(*putprim)(scanin, RED);
488			(*putprim)(scanin, GRN);
489			(*putprim)(scanin, BLU);
490	greg	2.11	} else
491	greg	2.15	(*putprim)(scanin, GRY);
492	greg	2.1	if (ferror(stdout))
493			quiterr("error writing PostScript file");
494			}
495			putchar('\n');
496			/* free scanline */
497	greg	2.24	free((void *)scanin);
498	greg	2.11	}
499
500
501	schorsch	2.28	static void
502			Aputprim( /* put out hex ASCII primary from scanline */
503			COLR *scn,
504			int pri
505			)
506	greg	2.15	{
507			static char hexdigit[] = "0123456789ABCDEF";
508			static int col = 0;
509	greg	2.32	int x, c;
510	greg	2.15
511			for (x = 0; x < xmax; x++) {
512			if (pri == GRY)
513			c = normbright(scn[x]);
514			else
515			c = scn[x][pri];
516			if (c > 255) c = 255;
517			putchar(hexdigit[c>>4]);
518			putchar(hexdigit[c&0xf]);
519			if ((col += 2) >= 72) {
520			putchar('\n');
521			col = 0;
522			}
523			}
524			}
525
526
527	schorsch	2.28	static void
528			Bputprim( /* put out binary primary from scanline */
529			COLR *scn,
530			int pri
531			)
532	greg	2.15	{
533	greg	2.32	int x, c;
534	greg	2.15
535			for (x = 0; x < xmax; x++) {
536			if (pri == GRY)
537			c = normbright(scn[x]);
538			else
539			c = scn[x][pri];
540			if (c > 255) c = 255;
541			putchar(c);
542			}
543			}
544
545
546	schorsch	2.28	static void
547			Cputprim( /* put out compressed primary from scanline */
548			COLR *scn,
549			int pri
550			)
551	greg	2.11	{
552	greg	2.32	int c;
553			int x;
554	greg	2.11	int lastc, cnt;
555
556			lastc = -1; cnt = 0;
557			for (x = 0; x < xmax; x++) {
558			if (pri == GRY)
559			c = normbright(scn[x]) + 2;
560			else
561			c = scn[x][pri] + 2;
562			if (c > 255) c = 255;
563			c = code[c>>2];
564			if (c == lastc && cnt < MAXRUN)
565			cnt++;
566			else {
567			putrle(cnt, lastc);
568			lastc = c;
569			cnt = 1;
570			}
571			}
572			putrle(cnt, lastc);
573	greg	2.9	}
574
575
576	schorsch	2.28	static void
577			putrle( /* put out cnt of cod */
578	greg	2.32	int cnt,
579			int cod
580	schorsch	2.28	)
581	greg	2.9	{
582			static int col = 0;
583
584			if (cnt >= MINRUN) {
585			col += 3;
586			putchar(RUNCHR);
587			putchar(RSTRT-MINRUN+cnt);
588			putchar(cod);
589			} else {
590			col += cnt;
591			while (cnt-- > 0)
592			putchar(cod);
593			}
594			if (col >= 72) {
595			putchar('\n');
596			col = 0;
597			}
598	greg	2.1	}