src/px/ra_ps.c

/* Copyright (c) 1992 Regents of the University of California */

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

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

#include  <stdio.h>
#include  "color.h"
#include  "random.h"

#define HMARGIN         (.5*72)                 /* horizontal margin */
#define VMARGIN         (.5*72)                 /* vertical margin */
#define PWIDTH          (8.5*72-2*HMARGIN)      /* width of device */
#define PHEIGHT         (11*72-2*VMARGIN)       /* height of device */

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

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

int  bradj = 0;                         /* brightness adjustment */

char  *progname;

int  xmax, ymax;


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;
        
        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'e':               /* exposure adjustment */
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = 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, "can't open output \"%s\"\n",
                                progname, argv[i+1]);
                exit(1);
        }
                                /* get our header */
        getheader(stdin, headline, NULL);
        if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0)
                quiterr("bad picture format");
                                /* write header */
        PSheader(i <= argc-1 ? argv[i] : "<stdin>");
                                /* convert file */
        ra2ps();
                                /* write trailer */
        PStrailer();
        exit(0);
userr:
        fprintf(stderr, "Usage: %s [-e +/-stops] [input [output]]\n", progname);
        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;
{
        int  landscape = 0;
        double  pwidth, pheight;
        double  iwidth, iheight;

        printf("%%!\n");
        printf("%%%%Title: %s\n", name);
        printf("%%%%Creator: %s\n", progname);
        printf("%%%%Pages: 1\n");
        if (landscape = xmax > pixaspect*ymax)
                printf("%%%%Landscape\n");
        else
                printf("%%%%Portrait\n");
        printf("%%%%EndComments\n");
        printf("gsave\n");
        printf("64 dict begin\n");
                                        /* set up transformation matrix */
        printf("%f %f translate\n", HMARGIN, VMARGIN);
        if (PWIDTH > PHEIGHT ^ landscape) {
                printf("0 %f translate\n", PHEIGHT);
                printf("-90 rotate\n");
                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);
        }
        printf("%f %f translate\n", (pwidth-iwidth)*.5, (pheight-iheight)*.5);
        printf("%f %f scale\n", iwidth, iheight);
        PSprocdef("read6bit");
        printf("%%%%EndProlog\n");
        printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bit} image", xmax, ymax,
                        xmax, -ymax, ymax);
}


PStrailer()                     /* print PostScript trailer */
{
        puts("%%Trailer");
        puts("end");
        puts("showpage");
        puts("grestore");
        puts("%%EOF");
}


PSprocdef(nam)                  /* define PS procedure to read image */
char  *nam;
{
        short  itab[128];
        register int  i;
        
        for (i = 0; i < 128; i++)
                itab[i] = -1;
        for (i = 0; i < 64; i++)
                itab[code[i]] = i<<2 | 2;
        printf("/decode [");
        for (i = 0; i < 128; i++) {
                if (!(i & 0xf))
                        putchar('\n');
                printf(" %3d", itab[i]);
        }
        printf("\n] def\n");
        printf("/scanline %d string def\n", xmax);
        printf("/%s {\n", nam);
        printf("\t{ 0 1 %d { scanline exch\n", xmax-1);
        printf("\t\t{ decode currentfile read not {stop} if get\n");
        printf("\tdup 0 lt {pop} {exit} ifelse } loop put } for\n");
        printf("} stopped {pop pop pop 0 string} {scanline} ifelse } def\n");
}


ra2ps()                         /* convert Radiance scanlines to 6-bit */
{
        COLR    *scanin;
        register int    col = 0;
        register int    c;
        register int    x;
        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");
                normcolrs(scanin, xmax, bradj); /* normalize */
                for (x = 0; x < xmax; x++) {
                        if (!(col++ & 0x3f))
                                putchar('\n');
                        c = normbright(scanin[x]) + (random()&3);
                        if (c > 255) c = 255;
                        putchar(code[c>>2]);
                }
                if (ferror(stdout))
                        quiterr("error writing PostScript file");
        }
        putchar('\n');
                                                /* free scanline */
        free((char *)scanin);
}
Revision:	2.2
Committed:	Mon Jul 13 09:53:14 1992 UTC (31 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.1:	+11 -18 lines
Log Message:	changed and fixed image transformation
#	User	Rev	Content
1	greg	2.1	/* Copyright (c) 1992 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Radiance picture to PostScript file translator -- one way!
9			*/
10
11			#include <stdio.h>
12			#include "color.h"
13			#include "random.h"
14
15			#define HMARGIN (.572) / horizontal margin */
16			#define VMARGIN (.572) / vertical margin */
17			#define PWIDTH (8.572-2HMARGIN) /* width of device */
18			#define PHEIGHT (1172-2VMARGIN) /* height of device */
19
20			char code[] = /* 6-bit code lookup table */
21			"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+";
22
23			int wrongformat = 0; /* input in wrong format? */
24			double pixaspect = 1.0; /* pixel aspect ratio */
25
26			int bradj = 0; /* brightness adjustment */
27
28			char *progname;
29
30			int xmax, ymax;
31
32
33			headline(s) /* check header line */
34			char *s;
35			{
36			char fmt[32];
37
38			if (isformat(s)) {
39			formatval(fmt, s);
40			wrongformat = strcmp(fmt, COLRFMT);
41			} else if (isaspect(s))
42			pixaspect *= aspectval(s);
43			}
44
45
46			main(argc, argv)
47			int argc;
48			char *argv[];
49			{
50			int i;
51
52			progname = argv[0];
53
54			for (i = 1; i < argc; i++)
55			if (argv[i][0] == '-')
56			switch (argv[i][1]) {
57			case 'e': /* exposure adjustment */
58			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
59			goto userr;
60			bradj = atoi(argv[++i]);
61			break;
62			default:
63			goto userr;
64			}
65			else
66			break;
67
68			if (i < argc-2)
69			goto userr;
70			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
71			fprintf(stderr, "%s: can't open input \"%s\"\n",
72			progname, argv[i]);
73			exit(1);
74			}
75			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
76			fprintf(stderr, "can't open output \"%s\"\n",
77			progname, argv[i+1]);
78			exit(1);
79			}
80			/* get our header */
81			getheader(stdin, headline, NULL);
82			if (wrongformat \|\| fgetresolu(&xmax, &ymax, stdin) < 0)
83			quiterr("bad picture format");
84			/* write header */
85			PSheader(i <= argc-1 ? argv[i] : "<stdin>");
86			/* convert file */
87			ra2ps();
88			/* write trailer */
89			PStrailer();
90			exit(0);
91			userr:
92			fprintf(stderr, "Usage: %s [-e +/-stops] [input [output]]\n", progname);
93			exit(1);
94			}
95
96
97			quiterr(err) /* print message and exit */
98			char *err;
99			{
100			if (err != NULL) {
101			fprintf(stderr, "%s: %s\n", progname, err);
102			exit(1);
103			}
104			exit(0);
105			}
106
107
108			PSheader(name) /* print PostScript header */
109			char *name;
110			{
111			int landscape = 0;
112			double pwidth, pheight;
113	greg	2.2	double iwidth, iheight;
114	greg	2.1
115			printf("%%!\n");
116			printf("%%%%Title: %s\n", name);
117			printf("%%%%Creator: %s\n", progname);
118			printf("%%%%Pages: 1\n");
119			if (landscape = xmax > pixaspect*ymax)
120			printf("%%%%Landscape\n");
121			else
122			printf("%%%%Portrait\n");
123			printf("%%%%EndComments\n");
124			printf("gsave\n");
125			printf("64 dict begin\n");
126			/* set up transformation matrix */
127	greg	2.2	printf("%f %f translate\n", HMARGIN, VMARGIN);
128	greg	2.1	if (PWIDTH > PHEIGHT ^ landscape) {
129			printf("0 %f translate\n", PHEIGHT);
130	greg	2.2	printf("-90 rotate\n");
131	greg	2.1	pwidth = PHEIGHT;
132			pheight = PWIDTH;
133			} else {
134			pwidth = PWIDTH;
135			pheight = PHEIGHT;
136			}
137			if (pheight/pwidth > pixaspect*ymax/xmax) {
138	greg	2.2	iwidth = pwidth;
139			iheight = pwidthpixaspectymax/xmax;
140	greg	2.1	} else {
141	greg	2.2	iheight = pheight;
142			iwidth = pheightxmax/(pixaspectymax);
143	greg	2.1	}
144	greg	2.2	printf("%f %f translate\n", (pwidth-iwidth).5, (pheight-iheight).5);
145			printf("%f %f scale\n", iwidth, iheight);
146	greg	2.1	PSprocdef("read6bit");
147			printf("%%%%EndProlog\n");
148	greg	2.2	printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bit} image", xmax, ymax,
149			xmax, -ymax, ymax);
150	greg	2.1	}
151
152
153			PStrailer() /* print PostScript trailer */
154			{
155			puts("%%Trailer");
156			puts("end");
157			puts("showpage");
158			puts("grestore");
159			puts("%%EOF");
160			}
161
162
163			PSprocdef(nam) /* define PS procedure to read image */
164			char *nam;
165			{
166			short itab[128];
167			register int i;
168
169			for (i = 0; i < 128; i++)
170			itab[i] = -1;
171			for (i = 0; i < 64; i++)
172			itab[code[i]] = i<<2 \| 2;
173			printf("/decode [");
174			for (i = 0; i < 128; i++) {
175			if (!(i & 0xf))
176			putchar('\n');
177			printf(" %3d", itab[i]);
178			}
179			printf("\n] def\n");
180			printf("/scanline %d string def\n", xmax);
181			printf("/%s {\n", nam);
182			printf("\t{ 0 1 %d { scanline exch\n", xmax-1);
183			printf("\t\t{ decode currentfile read not {stop} if get\n");
184			printf("\tdup 0 lt {pop} {exit} ifelse } loop put } for\n");
185			printf("} stopped {pop pop pop 0 string} {scanline} ifelse } def\n");
186			}
187
188
189			ra2ps() /* convert Radiance scanlines to 6-bit */
190			{
191			COLR *scanin;
192			register int col = 0;
193			register int c;
194			register int x;
195			int y;
196			/* allocate scanline */
197			scanin = (COLR )malloc(xmaxsizeof(COLR));
198			if (scanin == NULL)
199			quiterr("out of memory in ra2ps");
200			/* convert image */
201			for (y = ymax-1; y >= 0; y--) {
202			if (freadcolrs(scanin, xmax, stdin) < 0)
203			quiterr("error reading Radiance picture");
204			normcolrs(scanin, xmax, bradj); /* normalize */
205			for (x = 0; x < xmax; x++) {
206			if (!(col++ & 0x3f))
207			putchar('\n');
208			c = normbright(scanin[x]) + (random()&3);
209			if (c > 255) c = 255;
210			putchar(code[c>>2]);
211			}
212			if (ferror(stdout))
213			quiterr("error writing PostScript file");
214			}
215			putchar('\n');
216			/* free scanline */
217			free((char *)scanin);
218			}