| 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 |
* ra_t8.c - program to convert between RADIANCE and |
| 9 |
* Targa 8-bit color-mapped images. |
| 10 |
* |
| 11 |
* 8/22/88 Adapted from ra_pr.c |
| 12 |
*/ |
| 13 |
|
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#include <stdio.h> |
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|
| 16 |
#include "color.h" |
| 17 |
|
| 18 |
#include "resolu.h" |
| 19 |
|
| 20 |
#include "targa.h" |
| 21 |
|
| 22 |
#ifdef MSDOS |
| 23 |
#include <fcntl.h> |
| 24 |
#endif |
| 25 |
|
| 26 |
#include <math.h> |
| 27 |
|
| 28 |
#ifndef BSD |
| 29 |
#define bcopy(s,d,n) (void)memcpy(d,s,n) |
| 30 |
extern char *memcpy(); |
| 31 |
#endif |
| 32 |
|
| 33 |
#define goodpic(h) (my_imType(h) && my_mapType(h)) |
| 34 |
#define my_imType(h) (((h)->dataType==IM_CMAP || (h)->dataType==IM_CCMAP) \ |
| 35 |
&& (h)->dataBits==8 && (h)->imType==0) |
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#define my_mapType(h) ((h)->mapType==CM_HASMAP && \ |
| 37 |
((h)->CMapBits==24 || (h)->CMapBits==32)) |
| 38 |
|
| 39 |
#define taralloc(h) (BYTE *)emalloc((h)->x*(h)->y) |
| 40 |
|
| 41 |
extern BYTE clrtab[][3]; |
| 42 |
|
| 43 |
extern char *ecalloc(), *emalloc(); |
| 44 |
|
| 45 |
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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|
| 57 |
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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|
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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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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]); |
| 113 |
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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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][-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 */ |
| 275 |
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; |
| 279 |
h->mapLength = 256; |
| 280 |
h->CMapBits = 24; |
| 281 |
h->XOffset = 0; |
| 282 |
h->YOffset = 0; |
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h->x = xmax; |
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h->y = ymax; |
| 285 |
h->dataBits = 8; |
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h->imType = 0; |
| 287 |
/* allocate scanline */ |
| 288 |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 289 |
/* allocate targa data */ |
| 290 |
tarData = taralloc(h); |
| 291 |
|
| 292 |
return(0); |
| 293 |
} |
| 294 |
|
| 295 |
|
| 296 |
tg2ra(hp) /* targa file to RADIANCE file */ |
| 297 |
struct hdStruct *hp; |
| 298 |
{ |
| 299 |
union { |
| 300 |
BYTE c3[256][3]; |
| 301 |
BYTE c4[256][4]; |
| 302 |
} map; |
| 303 |
COLR ctab[256]; |
| 304 |
COLR *scanline; |
| 305 |
register int i, j; |
| 306 |
|
| 307 |
/* get color table */ |
| 308 |
if ((hp->CMapBits==24 ? fread((char *)(map.c3+hp->mapOrig), |
| 309 |
3*hp->mapLength,1,stdin) : |
| 310 |
fread((char *)(map.c4+hp->mapOrig), |
| 311 |
4*hp->mapLength,1,stdin)) != 1) |
| 312 |
quiterr("error reading color table"); |
| 313 |
/* convert table */ |
| 314 |
for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++) |
| 315 |
if (hp->CMapBits == 24) |
| 316 |
setcolr(ctab[i], |
| 317 |
pow((map.c3[i][2]+.5)/256.,gamv), |
| 318 |
pow((map.c3[i][1]+.5)/256.,gamv), |
| 319 |
pow((map.c3[i][0]+.5)/256.,gamv)); |
| 320 |
else |
| 321 |
setcolr(ctab[i], |
| 322 |
pow((map.c4[i][3]+.5)/256.,gamv), |
| 323 |
pow((map.c4[i][2]+.5)/256.,gamv), |
| 324 |
pow((map.c4[i][1]+.5)/256.,gamv)); |
| 325 |
if (bradj) |
| 326 |
shiftcolrs(ctab, 256, bradj); |
| 327 |
/* allocate targa data */ |
| 328 |
tarData = taralloc(hp); |
| 329 |
/* get data */ |
| 330 |
readtarga(hp, tarData, stdin); |
| 331 |
/* allocate input scanline */ |
| 332 |
scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 333 |
/* convert file */ |
| 334 |
for (i = ymax-1; i >= 0; i--) { |
| 335 |
for (j = 0; j < xmax; j++) |
| 336 |
copycolr(scanline[j], ctab[tarData[i*xmax+j]]); |
| 337 |
if (fwritecolrs(scanline, xmax, stdout) < 0) |
| 338 |
quiterr("error writing RADIANCE file"); |
| 339 |
} |
| 340 |
free((char *)scanline); |
| 341 |
free((char *)tarData); |
| 342 |
} |
| 343 |
|
| 344 |
|
| 345 |
getmapped(nc, dith) /* read in and quantize image */ |
| 346 |
int nc; /* number of colors to use */ |
| 347 |
int dith; /* use dithering? */ |
| 348 |
{ |
| 349 |
long fpos; |
| 350 |
register int y; |
| 351 |
|
| 352 |
setcolrgam(gamv); |
| 353 |
fpos = ftell(stdin); |
| 354 |
new_histo(); /* build histogram */ |
| 355 |
for (y = ymax-1; y >= 0; y--) { |
| 356 |
if (freadcolrs(inl, xmax, stdin) < 0) |
| 357 |
quiterr("error reading Radiance input"); |
| 358 |
if (bradj) |
| 359 |
shiftcolrs(inl, xmax, bradj); |
| 360 |
colrs_gambs(inl, xmax); |
| 361 |
cnt_colrs(inl, xmax); |
| 362 |
} |
| 363 |
if (fseek(stdin, fpos, 0) == EOF) |
| 364 |
quiterr("Radiance input must be from a file"); |
| 365 |
new_clrtab(nc); /* map colors */ |
| 366 |
for (y = ymax-1; y >= 0; y--) { |
| 367 |
if (freadcolrs(inl, xmax, stdin) < 0) |
| 368 |
quiterr("error reading Radiance input"); |
| 369 |
if (bradj) |
| 370 |
shiftcolrs(inl, xmax, bradj); |
| 371 |
colrs_gambs(inl, xmax); |
| 372 |
if (dith) |
| 373 |
dith_colrs(tarData+y*xmax, inl, xmax); |
| 374 |
else |
| 375 |
map_colrs(tarData+y*xmax, inl, xmax); |
| 376 |
} |
| 377 |
} |
| 378 |
|
| 379 |
|
| 380 |
getgrey(nc) /* read in and convert to greyscale image */ |
| 381 |
int nc; /* number of colors to use */ |
| 382 |
{ |
| 383 |
int y; |
| 384 |
register BYTE *dp; |
| 385 |
register int x; |
| 386 |
|
| 387 |
setcolrgam(gamv); |
| 388 |
dp = tarData+xmax*ymax;; |
| 389 |
for (y = ymax-1; y >= 0; y--) { |
| 390 |
if (freadcolrs(inl, xmax, stdin) < 0) |
| 391 |
quiterr("error reading Radiance input"); |
| 392 |
if (bradj) |
| 393 |
shiftcolrs(inl, xmax, bradj); |
| 394 |
x = xmax; |
| 395 |
while (x--) |
| 396 |
inl[x][GRN] = normbright(inl[x]); |
| 397 |
colrs_gambs(inl, xmax); |
| 398 |
x = xmax; |
| 399 |
if (nc < 256) |
| 400 |
while (x--) |
| 401 |
*--dp = ((long)inl[x][GRN]*nc+nc/2)>>8; |
| 402 |
else |
| 403 |
while (x--) |
| 404 |
*--dp = inl[x][GRN]; |
| 405 |
} |
| 406 |
for (x = 0; x < nc; x++) |
| 407 |
clrtab[x][RED] = clrtab[x][GRN] = |
| 408 |
clrtab[x][BLU] = ((long)x*256+128)/nc; |
| 409 |
} |
| 410 |
|
| 411 |
|
| 412 |
writetarga(h, d, fp) /* write out targa data */ |
| 413 |
struct hdStruct *h; |
| 414 |
BYTE *d; |
| 415 |
FILE *fp; |
| 416 |
{ |
| 417 |
register int i, j; |
| 418 |
|
| 419 |
for (i = 0; i < h->mapLength; i++) /* write color map */ |
| 420 |
for (j = 2; j >= 0; j--) |
| 421 |
putc(clrtab[i][j], fp); |
| 422 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
| 423 |
if (fwrite((char *)d,h->x*sizeof(BYTE),h->y,fp) != h->y) |
| 424 |
quiterr("error writing targa file"); |
| 425 |
return; |
| 426 |
} |
| 427 |
quiterr("unsupported output type"); |
| 428 |
} |
| 429 |
|
| 430 |
|
| 431 |
readtarga(h, data, fp) /* read in targa data */ |
| 432 |
struct hdStruct *h; |
| 433 |
BYTE *data; |
| 434 |
FILE *fp; |
| 435 |
{ |
| 436 |
register int cnt, c; |
| 437 |
register BYTE *dp; |
| 438 |
|
| 439 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
| 440 |
if (fread((char *)data,h->x*sizeof(BYTE),h->y,fp) != h->y) |
| 441 |
goto readerr; |
| 442 |
return; |
| 443 |
} |
| 444 |
for (dp = data; dp < data+h->x*h->y; ) { |
| 445 |
if ((c = getc(fp)) == EOF) |
| 446 |
goto readerr; |
| 447 |
cnt = (c & 0x7f) + 1; |
| 448 |
if (c & 0x80) { /* repeated pixel */ |
| 449 |
if ((c = getc(fp)) == EOF) |
| 450 |
goto readerr; |
| 451 |
while (cnt--) |
| 452 |
*dp++ = c; |
| 453 |
} else /* non-repeating pixels */ |
| 454 |
while (cnt--) { |
| 455 |
if ((c = getc(fp)) == EOF) |
| 456 |
goto readerr; |
| 457 |
*dp++ = c; |
| 458 |
} |
| 459 |
} |
| 460 |
return; |
| 461 |
readerr: |
| 462 |
quiterr("error reading targa file"); |
| 463 |
} |
