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/* Copyright (c) 1992 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* Radiance picture to PostScript file translator -- one way! |
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*/ |
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|
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#include <stdio.h> |
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#ifdef MSDOS |
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#include <fcntl.h> |
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#endif |
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#include "color.h" |
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|
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#define HMARGIN (.5*72) /* horizontal margin */ |
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#define VMARGIN (.5*72) /* vertical margin */ |
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#define PWIDTH (8.5*72-2*HMARGIN) /* width of device */ |
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#define PHEIGHT (11*72-2*VMARGIN) /* height of device */ |
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|
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#define RUNCHR '*' /* character to start rle */ |
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#define MINRUN 4 /* minimum run-length */ |
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#define RSTRT '!' /* character for MINRUN */ |
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#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */ |
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|
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char code[] = /* 6-bit code lookup table */ |
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"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+"; |
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|
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int wrongformat = 0; /* input in wrong format? */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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|
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int bradj = 0; /* brightness adjustment */ |
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int ncopies = 1; /* number of copies */ |
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|
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char *progname; |
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|
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int xmax, ymax; |
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|
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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 '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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/* 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 [-e +/-stops] [input [output]]\n", 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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int landscape = 0; |
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double pwidth, pheight; |
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double iwidth, iheight; |
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|
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printf("%%!\n"); |
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printf("%%%%Title: %s\n", name); |
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printf("%%%%Creator: %s\n", progname); |
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printf("%%%%Pages: %d\n", ncopies); |
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if (landscape = xmax > pixaspect*ymax) |
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printf("%%%%Landscape\n"); |
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else |
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printf("%%%%Portrait\n"); |
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printf("%%%%EndComments\n"); |
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printf("64 dict begin\n"); |
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/* define image reader */ |
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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 ^ landscape) { |
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printf("0 %f translate\n", PHEIGHT); |
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printf("-90 rotate\n"); |
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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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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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printf("%%%%EndProlog\n"); |
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/* start image procedure */ |
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printf("%d %d 8 [%d 0 0 %d 0 %d] {read6bitRLE} image\n", xmax, ymax, |
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xmax, -ymax, ymax); |
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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("%%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]] = i<<2 | 2; |
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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("/scanline %d string def\n", xmax); |
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printf("/nrept 0 def\n"); |
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printf("/readbyte { currentfile read not {stop} if } def\n"); |
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printf("/decode { codetab exch get } def\n"); |
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printf("/%s {\n", nam); |
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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 */ |
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{ |
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register COLR *scanin; |
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register int c; |
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int lastc, cnt; |
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register int x; |
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int y; |
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/* allocate scanline */ |
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scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
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if (scanin == NULL) |
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quiterr("out of memory in ra2ps"); |
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/* convert image */ |
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for (y = ymax-1; y >= 0; y--) { |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
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quiterr("error reading Radiance picture"); |
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normcolrs(scanin, xmax, bradj); /* normalize */ |
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lastc = -1; cnt = 0; |
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for (x = 0; x < xmax; x++) { |
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c = normbright(scanin[x]) + 2; |
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if (c > 255) c = 255; |
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c = code[c>>2]; |
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if (c == lastc && cnt < MAXRUN) |
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cnt++; |
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else { |
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putrle(cnt, lastc); |
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lastc = c; |
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cnt = 1; |
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} |
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} |
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putrle(cnt, lastc); |
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if (ferror(stdout)) |
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quiterr("error writing PostScript file"); |
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} |
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putchar('\n'); |
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/* free scanline */ |
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free((char *)scanin); |
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} |
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|
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|
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putrle(cnt, cod) /* put out cnt of cod */ |
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register int cnt, cod; |
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{ |
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static int col = 0; |
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|
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if (cnt >= MINRUN) { |
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col += 3; |
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putchar(RUNCHR); |
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putchar(RSTRT-MINRUN+cnt); |
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putchar(cod); |
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} else { |
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col += cnt; |
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while (cnt-- > 0) |
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putchar(cod); |
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} |
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if (col >= 72) { |
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putchar('\n'); |
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col = 0; |
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} |
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} |
