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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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* ra_t8.c - program to convert between RADIANCE and |
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* Targa 8-bit color-mapped images. |
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* |
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* 8/22/88 Adapted from ra_pr.c |
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*/ |
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|
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#include <stdio.h> |
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|
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#include "color.h" |
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|
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#include "resolu.h" |
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|
20 |
#include "targa.h" |
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|
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#ifdef MSDOS |
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#include <fcntl.h> |
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#endif |
25 |
|
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#include <math.h> |
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|
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#ifndef BSD |
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#define bcopy(s,d,n) (void)memcpy(d,s,n) |
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extern char *memcpy(); |
31 |
#endif |
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|
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#define goodpic(h) (my_imType(h) && my_mapType(h)) |
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#define my_imType(h) (((h)->dataType==IM_CMAP || (h)->dataType==IM_CCMAP) \ |
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&& (h)->dataBits==8 && (h)->imType==0) |
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#define my_mapType(h) ((h)->mapType==CM_HASMAP && \ |
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((h)->CMapBits==24 || (h)->CMapBits==32)) |
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|
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#define taralloc(h) (BYTE *)emalloc((h)->x*(h)->y) |
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|
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BYTE clrtab[256][3]; |
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|
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extern int samplefac; |
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|
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extern char *ecalloc(), *emalloc(); |
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|
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extern long ftell(); |
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|
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double gamv = 2.2; /* gamv correction */ |
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|
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int bradj = 0; /* brightness adjustment */ |
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|
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char *progname; |
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|
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char errmsg[128]; |
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|
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COLR *inl; |
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|
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BYTE *tarData; |
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|
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int xmax, ymax; |
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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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struct hdStruct head; |
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int dither = 1; |
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int reverse = 0; |
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int ncolors = 256; |
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int greyscale = 0; |
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int i; |
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#ifdef MSDOS |
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extern int _fmode; |
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_fmode = O_BINARY; |
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setmode(fileno(stdin), O_BINARY); |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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progname = argv[0]; |
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samplefac = 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 'd': |
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dither = !dither; |
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break; |
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case 'g': |
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gamv = atof(argv[++i]); |
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break; |
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case 'r': |
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reverse = !reverse; |
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break; |
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case 'b': |
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greyscale = 1; |
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break; |
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case 'e': |
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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 'c': |
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ncolors = atoi(argv[++i]); |
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break; |
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case 'n': |
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samplefac = 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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sprintf(errmsg, "cannot open input \"%s\"", argv[i]); |
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quiterr(errmsg); |
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} |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
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sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]); |
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quiterr(errmsg); |
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} |
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if (reverse) { |
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/* get header */ |
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if (getthead(&head, NULL, stdin) < 0) |
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quiterr("bad targa file"); |
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if (!goodpic(&head)) |
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quiterr("incompatible format"); |
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xmax = head.x; |
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ymax = head.y; |
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/* put header */ |
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newheader("RADIANCE", stdout); |
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printargs(i, argv, stdout); |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
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fprtresolu(xmax, ymax, stdout); |
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/* convert file */ |
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tg2ra(&head); |
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} else { |
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if (getrhead(&head, stdin) < 0) |
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quiterr("bad Radiance input"); |
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/* write header */ |
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putthead(&head, NULL, stdout); |
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/* convert file */ |
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if (greyscale) |
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getgrey(ncolors); |
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else |
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getmapped(ncolors, dither); |
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/* write data */ |
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writetarga(&head, tarData, stdout); |
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} |
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quiterr(NULL); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-d][-n samp][-c ncolors][-b][-g gamv][-e +/-stops] input [output]\n", |
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progname); |
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fprintf(stderr, " Or: %s -r [-g gamv][-e +/-stops] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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|
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|
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int |
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getint2(fp) /* get a 2-byte positive integer */ |
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register FILE *fp; |
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{ |
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register int b1, b2; |
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|
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if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
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quiterr("read error"); |
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|
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return(b1 | b2<<8); |
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} |
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|
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|
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putint2(i, fp) /* put a 2-byte positive integer */ |
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register int i; |
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register FILE *fp; |
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{ |
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putc(i&0xff, fp); |
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putc(i>>8&0xff, fp); |
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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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eputs(s) |
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char *s; |
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{ |
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fputs(s, stderr); |
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} |
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|
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|
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quit(code) |
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int code; |
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{ |
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exit(code); |
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} |
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|
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|
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getthead(hp, ip, fp) /* read header from input */ |
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struct hdStruct *hp; |
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char *ip; |
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register FILE *fp; |
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{ |
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int nidbytes; |
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|
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if ((nidbytes = getc(fp)) == EOF) |
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return(-1); |
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hp->mapType = getc(fp); |
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hp->dataType = getc(fp); |
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hp->mapOrig = getint2(fp); |
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hp->mapLength = getint2(fp); |
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hp->CMapBits = getc(fp); |
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hp->XOffset = getint2(fp); |
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hp->YOffset = getint2(fp); |
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hp->x = getint2(fp); |
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hp->y = getint2(fp); |
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hp->dataBits = getc(fp); |
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hp->imType = getc(fp); |
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|
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if (ip != NULL) |
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if (nidbytes) |
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fread((char *)ip, nidbytes, 1, fp); |
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else |
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*ip = '\0'; |
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else if (nidbytes) |
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fseek(fp, (long)nidbytes, 1); |
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|
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return(feof(fp) || ferror(fp) ? -1 : 0); |
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} |
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|
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|
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putthead(hp, ip, fp) /* write header to output */ |
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struct hdStruct *hp; |
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char *ip; |
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register FILE *fp; |
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{ |
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if (ip != NULL) |
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putc(strlen(ip), fp); |
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else |
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putc(0, fp); |
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putc(hp->mapType, fp); |
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putc(hp->dataType, fp); |
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putint2(hp->mapOrig, fp); |
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putint2(hp->mapLength, fp); |
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putc(hp->CMapBits, fp); |
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putint2(hp->XOffset, fp); |
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putint2(hp->YOffset, fp); |
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putint2(hp->x, fp); |
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putint2(hp->y, fp); |
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putc(hp->dataBits, fp); |
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putc(hp->imType, fp); |
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|
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if (ip != NULL) |
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fputs(ip, fp); |
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|
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return(ferror(fp) ? -1 : 0); |
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} |
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|
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|
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getrhead(h, fp) /* load RADIANCE input file header */ |
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register struct hdStruct *h; |
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FILE *fp; |
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{ |
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/* get header info. */ |
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if (checkheader(fp, COLRFMT, NULL) < 0 || |
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fgetresolu(&xmax, &ymax, fp) < 0) |
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return(-1); |
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/* assign header */ |
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h->textSize = 0; |
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h->mapType = CM_HASMAP; |
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h->dataType = IM_CMAP; |
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h->mapOrig = 0; |
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h->mapLength = 256; |
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h->CMapBits = 24; |
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h->XOffset = 0; |
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h->YOffset = 0; |
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h->x = xmax; |
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h->y = ymax; |
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h->dataBits = 8; |
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h->imType = 0; |
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/* allocate scanline */ |
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inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
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/* allocate targa data */ |
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tarData = taralloc(h); |
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|
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return(0); |
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} |
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|
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|
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tg2ra(hp) /* targa file to RADIANCE file */ |
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struct hdStruct *hp; |
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{ |
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union { |
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BYTE c3[256][3]; |
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BYTE c4[256][4]; |
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} map; |
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COLR ctab[256]; |
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COLR *scanline; |
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register int i, j; |
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|
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/* get color table */ |
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if ((hp->CMapBits==24 ? fread((char *)(map.c3+hp->mapOrig), |
316 |
3*hp->mapLength,1,stdin) : |
317 |
fread((char *)(map.c4+hp->mapOrig), |
318 |
4*hp->mapLength,1,stdin)) != 1) |
319 |
quiterr("error reading color table"); |
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/* convert table */ |
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for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++) |
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if (hp->CMapBits == 24) |
323 |
setcolr(ctab[i], |
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pow((map.c3[i][2]+.5)/256.,gamv), |
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pow((map.c3[i][1]+.5)/256.,gamv), |
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pow((map.c3[i][0]+.5)/256.,gamv)); |
327 |
else |
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setcolr(ctab[i], |
329 |
pow((map.c4[i][3]+.5)/256.,gamv), |
330 |
pow((map.c4[i][2]+.5)/256.,gamv), |
331 |
pow((map.c4[i][1]+.5)/256.,gamv)); |
332 |
if (bradj) |
333 |
shiftcolrs(ctab, 256, bradj); |
334 |
/* allocate targa data */ |
335 |
tarData = taralloc(hp); |
336 |
/* get data */ |
337 |
readtarga(hp, tarData, stdin); |
338 |
/* allocate input scanline */ |
339 |
scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
340 |
/* convert file */ |
341 |
for (i = ymax-1; i >= 0; i--) { |
342 |
for (j = 0; j < xmax; j++) |
343 |
copycolr(scanline[j], ctab[tarData[i*xmax+j]]); |
344 |
if (fwritecolrs(scanline, xmax, stdout) < 0) |
345 |
quiterr("error writing RADIANCE file"); |
346 |
} |
347 |
free((char *)scanline); |
348 |
free((char *)tarData); |
349 |
} |
350 |
|
351 |
|
352 |
getmapped(nc, dith) /* read in and quantize image */ |
353 |
int nc; /* number of colors to use */ |
354 |
int dith; /* use dithering? */ |
355 |
{ |
356 |
long fpos; |
357 |
register int y; |
358 |
|
359 |
setcolrgam(gamv); |
360 |
fpos = ftell(stdin); |
361 |
if ((samplefac ? neu_init(xmax*ymax) : new_histo(xmax*ymax)) == -1) |
362 |
quiterr("cannot initialized histogram"); |
363 |
for (y = ymax-1; y >= 0; y--) { |
364 |
if (freadcolrs(inl, xmax, stdin) < 0) |
365 |
quiterr("error reading Radiance input"); |
366 |
if (bradj) |
367 |
shiftcolrs(inl, xmax, bradj); |
368 |
colrs_gambs(inl, xmax); |
369 |
if (samplefac) |
370 |
neu_colrs(inl, xmax); |
371 |
else |
372 |
cnt_colrs(inl, xmax); |
373 |
} |
374 |
if (fseek(stdin, fpos, 0) == EOF) |
375 |
quiterr("Radiance input must be from a file"); |
376 |
if (samplefac) /* map colors */ |
377 |
neu_clrtab(nc); |
378 |
else |
379 |
new_clrtab(nc); |
380 |
for (y = ymax-1; y >= 0; y--) { |
381 |
if (freadcolrs(inl, xmax, stdin) < 0) |
382 |
quiterr("error reading Radiance input"); |
383 |
if (bradj) |
384 |
shiftcolrs(inl, xmax, bradj); |
385 |
colrs_gambs(inl, xmax); |
386 |
if (samplefac) |
387 |
if (dith) |
388 |
neu_dith_colrs(tarData+y*xmax, inl, xmax); |
389 |
else |
390 |
neu_map_colrs(tarData+y*xmax, inl, xmax); |
391 |
else |
392 |
if (dith) |
393 |
dith_colrs(tarData+y*xmax, inl, xmax); |
394 |
else |
395 |
map_colrs(tarData+y*xmax, inl, xmax); |
396 |
} |
397 |
} |
398 |
|
399 |
|
400 |
getgrey(nc) /* read in and convert to greyscale image */ |
401 |
int nc; /* number of colors to use */ |
402 |
{ |
403 |
int y; |
404 |
register BYTE *dp; |
405 |
register int x; |
406 |
|
407 |
setcolrgam(gamv); |
408 |
dp = tarData+xmax*ymax;; |
409 |
for (y = ymax-1; y >= 0; y--) { |
410 |
if (freadcolrs(inl, xmax, stdin) < 0) |
411 |
quiterr("error reading Radiance input"); |
412 |
if (bradj) |
413 |
shiftcolrs(inl, xmax, bradj); |
414 |
x = xmax; |
415 |
while (x--) |
416 |
inl[x][GRN] = normbright(inl[x]); |
417 |
colrs_gambs(inl, xmax); |
418 |
x = xmax; |
419 |
if (nc < 256) |
420 |
while (x--) |
421 |
*--dp = ((long)inl[x][GRN]*nc+nc/2)>>8; |
422 |
else |
423 |
while (x--) |
424 |
*--dp = inl[x][GRN]; |
425 |
} |
426 |
for (x = 0; x < nc; x++) |
427 |
clrtab[x][RED] = clrtab[x][GRN] = |
428 |
clrtab[x][BLU] = ((long)x*256+128)/nc; |
429 |
} |
430 |
|
431 |
|
432 |
writetarga(h, d, fp) /* write out targa data */ |
433 |
struct hdStruct *h; |
434 |
BYTE *d; |
435 |
FILE *fp; |
436 |
{ |
437 |
register int i, j; |
438 |
|
439 |
for (i = 0; i < h->mapLength; i++) /* write color map */ |
440 |
for (j = 2; j >= 0; j--) |
441 |
putc(clrtab[i][j], fp); |
442 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
443 |
if (fwrite((char *)d,h->x*sizeof(BYTE),h->y,fp) != h->y) |
444 |
quiterr("error writing targa file"); |
445 |
return; |
446 |
} |
447 |
quiterr("unsupported output type"); |
448 |
} |
449 |
|
450 |
|
451 |
readtarga(h, data, fp) /* read in targa data */ |
452 |
struct hdStruct *h; |
453 |
BYTE *data; |
454 |
FILE *fp; |
455 |
{ |
456 |
register int cnt, c; |
457 |
register BYTE *dp; |
458 |
|
459 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
460 |
if (fread((char *)data,h->x*sizeof(BYTE),h->y,fp) != h->y) |
461 |
goto readerr; |
462 |
return; |
463 |
} |
464 |
for (dp = data; dp < data+h->x*h->y; ) { |
465 |
if ((c = getc(fp)) == EOF) |
466 |
goto readerr; |
467 |
cnt = (c & 0x7f) + 1; |
468 |
if (c & 0x80) { /* repeated pixel */ |
469 |
if ((c = getc(fp)) == EOF) |
470 |
goto readerr; |
471 |
while (cnt--) |
472 |
*dp++ = c; |
473 |
} else /* non-repeating pixels */ |
474 |
while (cnt--) { |
475 |
if ((c = getc(fp)) == EOF) |
476 |
goto readerr; |
477 |
*dp++ = c; |
478 |
} |
479 |
} |
480 |
return; |
481 |
readerr: |
482 |
quiterr("error reading targa file"); |
483 |
} |