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greg |
1.1 |
/* Copyright (c) 1986 Regents of the University of California */ |
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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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* 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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#include <stdio.h> |
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#include "color.h" |
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#include "pic.h" |
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#include "targa.h" |
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/* descriptor for a picture file or frame buffer */ |
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typedef struct { |
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char *name; /* file name */ |
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FILE *fp; /* file pointer */ |
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int nexty; /* file positioning */ |
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int bytes_line; /* 0 == variable length lines */ |
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union { |
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long b; /* initial scanline */ |
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long *y; /* individual scanline */ |
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} pos; /* position(s) */ |
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} pic; |
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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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#define taralloc(h) (pixel *)emalloc((h)->x*(h)->y*sizeof(pixel)) |
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extern pic *openinput(); |
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extern char *ecalloc(), *emalloc(); |
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extern long ftell(); |
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extern double atof(), pow(); |
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double gamma = 2.0; /* gamma correction */ |
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pic *inpic; |
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char *progname; |
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char errmsg[128]; |
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COLR *inline; |
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pixel *tarData; |
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int xmax, ymax; |
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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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colormap rasmap; |
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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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progname = argv[0]; |
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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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gamma = 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 '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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if (reverse) { |
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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, "can't open input \"%s\"", argv[i]); |
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quiterr(errmsg); |
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} |
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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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/* open output file */ |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
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sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
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quiterr(errmsg); |
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} |
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/* put header */ |
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printargs(argc, argv, stdout); |
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putchar('\n'); |
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printf("-Y %d +X %d\n", ymax, xmax); |
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/* convert file */ |
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tg2ra(&head); |
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} else { |
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if (i > argc-1 || i < argc-2) |
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goto userr; |
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if ((inpic = openinput(argv[i], &head)) == NULL) { |
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sprintf(errmsg, "can't 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, "can't open output \"%s\"", argv[i+1]); |
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quiterr(errmsg); |
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} |
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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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biq(dither,ncolors,1,rasmap); |
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else |
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ciq(dither,ncolors,1,rasmap); |
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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 gamma] input [output]\n", |
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progname); |
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fprintf(stderr, " Or: %s -r [-g gamma] [input [output]]\n", |
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progname); |
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exit(1); |
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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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if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
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quiterr("read error"); |
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return(b1 | b2<<8); |
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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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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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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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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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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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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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if (ip != NULL) |
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if (nidbytes) |
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fread(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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return(feof(fp) || ferror(fp) ? -1 : 0); |
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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 |
| 248 |
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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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if (ip != NULL) |
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fputs(ip, fp); |
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| 264 |
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return(ferror(fp) ? -1 : 0); |
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} |
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pic * |
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openinput(fname, h) /* open RADIANCE input file */ |
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char *fname; |
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register struct hdStruct *h; |
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{ |
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register pic *p; |
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p = (pic *)emalloc(sizeof(pic)); |
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p->name = fname; |
| 277 |
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if (fname == NULL) |
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p->fp = stdin; |
| 279 |
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else if ((p->fp = fopen(fname, "r")) == NULL) |
| 280 |
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return(NULL); |
| 281 |
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/* discard header */ |
| 282 |
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getheader(p->fp, NULL); |
| 283 |
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if (fscanf(p->fp, "-Y %d +X %d\n", &ymax, &xmax) != 2) |
| 284 |
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quiterr("bad picture size"); |
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p->nexty = 0; |
| 286 |
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p->bytes_line = 0; /* variable length lines */ |
| 287 |
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p->pos.y = (long *)ecalloc(ymax, sizeof(long)); |
| 288 |
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p->pos.y[0] = ftell(p->fp); |
| 289 |
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/* assign header */ |
| 290 |
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h->textSize = 0; |
| 291 |
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h->mapType = CM_HASMAP; |
| 292 |
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h->dataType = IM_CMAP; |
| 293 |
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h->mapOrig = 0; |
| 294 |
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h->mapLength = 256; |
| 295 |
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h->CMapBits = 24; |
| 296 |
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h->XOffset = 0; |
| 297 |
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h->YOffset = 0; |
| 298 |
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h->x = xmax; |
| 299 |
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h->y = ymax; |
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h->dataBits = 8; |
| 301 |
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h->imType = 0; |
| 302 |
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/* allocate scanline */ |
| 303 |
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inline = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 304 |
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/* allocate targa data */ |
| 305 |
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tarData = taralloc(h); |
| 306 |
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| 307 |
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return(p); |
| 308 |
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} |
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| 311 |
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tg2ra(hp) /* targa file to RADIANCE file */ |
| 312 |
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struct hdStruct *hp; |
| 313 |
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{ |
| 314 |
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union { |
| 315 |
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BYTE c3[256][3]; |
| 316 |
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BYTE c4[256][4]; |
| 317 |
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} map; |
| 318 |
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COLR ctab[256]; |
| 319 |
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COLR *scanline; |
| 320 |
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register int i, j; |
| 321 |
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| 322 |
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/* get color table */ |
| 323 |
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if ((hp->CMapBits==24 ? fread(map.c3, sizeof(map.c3), 1, stdin) : |
| 324 |
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fread(map.c4, sizeof(map.c4), 1, stdin)) != 1) |
| 325 |
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quiterr("error reading color table"); |
| 326 |
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/* convert table */ |
| 327 |
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for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++) |
| 328 |
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if (hp->CMapBits == 24) |
| 329 |
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setcolr(ctab[i], |
| 330 |
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pow((map.c3[i][2]+.5)/256.,gamma), |
| 331 |
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pow((map.c3[i][1]+.5)/256.,gamma), |
| 332 |
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pow((map.c3[i][0]+.5)/256.,gamma)); |
| 333 |
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else |
| 334 |
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setcolr(ctab[i], |
| 335 |
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pow((map.c4[i][3]+.5)/256.,gamma), |
| 336 |
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pow((map.c4[i][2]+.5)/256.,gamma), |
| 337 |
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pow((map.c4[i][1]+.5)/256.,gamma)); |
| 338 |
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| 339 |
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/* allocate targa data */ |
| 340 |
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tarData = taralloc(hp); |
| 341 |
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/* get data */ |
| 342 |
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readtarga(hp, tarData, stdin); |
| 343 |
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/* allocate input scanline */ |
| 344 |
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scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
| 345 |
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/* convert file */ |
| 346 |
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for (i = ymax-1; i >= 0; i--) { |
| 347 |
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for (j = 0; j < xmax; j++) |
| 348 |
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copycolr(scanline[j], ctab[tarData[i*xmax+j]]); |
| 349 |
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if (fwritecolrs(scanline, xmax, stdout) < 0) |
| 350 |
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quiterr("error writing RADIANCE file"); |
| 351 |
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} |
| 352 |
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free((char *)scanline); |
| 353 |
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free((char *)tarData); |
| 354 |
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} |
| 355 |
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| 356 |
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| 357 |
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picreadline3(y, l3) /* read in 3-byte scanline */ |
| 358 |
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int y; |
| 359 |
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register rgbpixel *l3; |
| 360 |
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{ |
| 361 |
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register BYTE *l4; |
| 362 |
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register int shift, c; |
| 363 |
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int i; |
| 364 |
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| 365 |
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if (inpic->nexty != y) { /* find scanline */ |
| 366 |
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if (inpic->bytes_line == 0) { |
| 367 |
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if (inpic->pos.y[y] == 0) { |
| 368 |
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while (inpic->nexty < y) { |
| 369 |
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if (freadcolrs(inline, xmax, inpic->fp) < 0) |
| 370 |
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quiterr("read error in picreadline3"); |
| 371 |
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inpic->pos.y[++inpic->nexty] = ftell(inpic->fp); |
| 372 |
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} |
| 373 |
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} else if (fseek(inpic->fp, inpic->pos.y[y], 0) == EOF) |
| 374 |
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quiterr("seek error in picreadline3"); |
| 375 |
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} else if (fseek(inpic->fp, y*inpic->bytes_line+inpic->pos.b, 0) == EOF) |
| 376 |
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quiterr("seek error in picreadline3"); |
| 377 |
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} else if (inpic->bytes_line == 0 && inpic->pos.y[inpic->nexty] == 0) |
| 378 |
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inpic->pos.y[inpic->nexty] = ftell(inpic->fp); |
| 379 |
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if (freadcolrs(inline, xmax, inpic->fp) < 0) /* read scanline */ |
| 380 |
|
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quiterr("read error in picreadline3"); |
| 381 |
|
|
inpic->nexty = y+1; |
| 382 |
|
|
/* convert scanline */ |
| 383 |
|
|
for (l4=inline[0], i=xmax; i--; l4+=4, l3++) { |
| 384 |
|
|
shift = l4[EXP] - COLXS; |
| 385 |
|
|
if (shift >= 8) { |
| 386 |
|
|
l3->r = l3->g = l3->b = 255; |
| 387 |
|
|
} else if (shift <= -8) { |
| 388 |
|
|
l3->r = l3->g = l3->b = 0; |
| 389 |
|
|
} else if (shift > 0) { |
| 390 |
|
|
c = l4[RED] << shift; |
| 391 |
|
|
l3->r = c > 255 ? 255 : c; |
| 392 |
|
|
c = l4[GRN] << shift; |
| 393 |
|
|
l3->g = c > 255 ? 255 : c; |
| 394 |
|
|
c = l4[BLU] << shift; |
| 395 |
|
|
l3->b = c > 255 ? 255 : c; |
| 396 |
|
|
} else if (shift < 0) { |
| 397 |
|
|
l3->r = l4[RED] >> -shift; |
| 398 |
|
|
l3->g = l4[GRN] >> -shift; |
| 399 |
|
|
l3->b = l4[BLU] >> -shift; |
| 400 |
|
|
} else { |
| 401 |
|
|
l3->r = l4[RED]; |
| 402 |
|
|
l3->g = l4[GRN]; |
| 403 |
|
|
l3->b = l4[BLU]; |
| 404 |
|
|
} |
| 405 |
|
|
} |
| 406 |
|
|
} |
| 407 |
|
|
|
| 408 |
|
|
|
| 409 |
|
|
picwriteline(y, l) /* save output scanline */ |
| 410 |
|
|
int y; |
| 411 |
|
|
pixel *l; |
| 412 |
|
|
{ |
| 413 |
|
|
bcopy(l, &tarData[(ymax-1-y)*xmax], xmax*sizeof(pixel)); |
| 414 |
|
|
} |
| 415 |
|
|
|
| 416 |
|
|
|
| 417 |
|
|
writetarga(h, d, fp) /* write out targa data */ |
| 418 |
|
|
struct hdStruct *h; |
| 419 |
|
|
pixel *d; |
| 420 |
|
|
FILE *fp; |
| 421 |
|
|
{ |
| 422 |
|
|
if (h->dataType == IM_CMAP) { /* uncompressed */ |
| 423 |
|
|
if (fwrite(d, h->x*sizeof(pixel), 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 |
|
|
pixel *data; |
| 434 |
|
|
FILE *fp; |
| 435 |
|
|
{ |
| 436 |
|
|
register int cnt, c; |
| 437 |
|
|
register pixel *dp; |
| 438 |
|
|
|
| 439 |
|
|
if (h->dataType == IM_CMAP) { /* uncompressed */ |
| 440 |
|
|
if (fread(data, h->x*sizeof(pixel), 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 |
|
|
} |
| 464 |
|
|
|
| 465 |
|
|
|
| 466 |
|
|
picwritecm(cm) /* write out color map */ |
| 467 |
|
|
colormap cm; |
| 468 |
|
|
{ |
| 469 |
|
|
register int i, j; |
| 470 |
|
|
|
| 471 |
|
|
for (j = 0; j < 256; j++) |
| 472 |
|
|
for (i = 2; i >= 0; i--) |
| 473 |
|
|
putc(cm[i][j], stdout); |
| 474 |
|
|
} |
| 475 |
|
|
|
| 476 |
|
|
|
| 477 |
|
|
picreadcm(map) /* do gamma correction if requested */ |
| 478 |
|
|
colormap map; |
| 479 |
|
|
{ |
| 480 |
|
|
register int i, val; |
| 481 |
|
|
|
| 482 |
|
|
for (i = 0; i < 256; i++) { |
| 483 |
|
|
val = pow(i/256.0, 1.0/gamma) * 256.0; |
| 484 |
|
|
map[0][i] = map[1][i] = map[2][i] = val; |
| 485 |
|
|
} |
| 486 |
|
|
} |
