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/* Copyright (c) 1986 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_t16.c - program to convert between RADIANCE and |
| 9 |
* Targa 16, 24 and 32-bit images. |
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* |
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* 11/2/88 Adapted from ra_t8.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 "random.h" |
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|
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#include "targa.h" |
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|
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#define goodpic(h) (((h)->dataType==IM_RGB || (h)->dataType==IM_CRGB) \ |
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&& ((h)->dataBits==16 || (h)->dataBits==24)) |
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|
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#define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8) |
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|
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#define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \ |
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readt24(h,d,f)) |
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|
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#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \ |
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writet24(h,d,f)) |
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|
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extern char *ecalloc(), *emalloc(); |
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|
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extern double atof(), pow(); |
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|
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double gamma = 2.0; /* gamma correction */ |
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|
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char *progname; |
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|
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char msg[128]; |
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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 reverse = 0; |
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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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head.dataBits = 16; |
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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 '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 '2': |
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head.dataBits = 16; |
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break; |
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case '3': |
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head.dataBits = 24; |
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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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/* open input file */ |
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if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
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sprintf(msg, "can't open input \"%s\"", argv[i]); |
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quiterr(msg); |
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} |
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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(msg, "can't open output \"%s\"", argv[i+1]); |
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quiterr(msg); |
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} |
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/* convert */ |
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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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/* put header */ |
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printargs(i, argv, stdout); |
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putchar('\n'); |
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fputresolu(YMAJOR|YDECR, head.x, head.y, stdout); |
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/* convert file */ |
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tg2ra(&head); |
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} else { |
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getheader(stdin, NULL); |
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if (fgetresolu(&head.x, &head.y, stdin) != (YMAJOR|YDECR)) |
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quiterr("bad picture file"); |
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/* assign header */ |
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head.textSize = 0; |
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head.mapType = CM_NOMAP; |
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head.dataType = IM_RGB; |
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head.XOffset = 0; |
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head.YOffset = 0; |
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head.imType = 0; |
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/* write header */ |
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putthead(&head, NULL, stdout); |
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/* convert file */ |
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ra2tg(&head); |
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} |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-2|-3|-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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|
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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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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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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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tg2ra(hp) /* targa file to RADIANCE file */ |
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struct hdStruct *hp; |
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{ |
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float gmap[256]; |
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COLOR *scanline; |
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unsigned char *tarData; |
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register int i, j; |
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/* set up gamma correction */ |
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for (i = 0; i < 256; i++) |
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gmap[i] = pow((i+.5)/256., gamma); |
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/* skip color table */ |
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if (hp->mapType == CM_HASMAP) |
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fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1); |
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/* allocate targa data */ |
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tarData = taralloc(hp); |
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/* get data */ |
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readtarga(hp, tarData, stdin); |
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/* allocate input scanline */ |
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scanline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
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/* convert file */ |
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for (i = hp->y-1; i >= 0; i--) { |
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if (hp->dataBits == 16) { |
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register unsigned short *dp; |
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dp = (unsigned short *)tarData + i*hp->x; |
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for (j = 0; j < hp->x; j++) { |
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setcolor(scanline[j], gmap[*dp>>7 & 0xf8], |
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gmap[*dp>>2 & 0xf8], |
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gmap[*dp<<3 & 0xf8]); |
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dp++; |
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} |
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} else { /* hp->dataBits == 24 */ |
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register unsigned char *dp; |
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dp = (unsigned char *)tarData + i*3*hp->x; |
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for (j = 0; j < hp->x; j++) { |
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setcolor(scanline[j], gmap[dp[2]], |
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gmap[dp[1]], |
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gmap[dp[0]]); |
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dp += 3; |
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} |
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} |
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if (fwritescan(scanline, hp->x, stdout) < 0) |
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quiterr("error writing RADIANCE file"); |
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} |
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free((char *)scanline); |
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free((char *)tarData); |
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} |
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|
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|
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ra2tg(hp) /* convert radiance to targa file */ |
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struct hdStruct *hp; |
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{ |
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#define map(v) (v >= 1.0 ? 1023 : (int)(v*1023.+.5)) |
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unsigned char gmap[1024]; |
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register int i, j; |
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unsigned char *tarData; |
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COLOR *inline; |
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/* set up gamma correction */ |
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for (i = 0; i < 1024; i++) { |
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j = 256.*pow((i+.5)/1024., 1./gamma); |
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gmap[i] = hp->dataBits == 16 && j > 248 ? 248 : j; |
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} |
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/* allocate space for data */ |
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inline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
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tarData = taralloc(hp); |
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/* convert file */ |
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for (j = hp->y-1; j >= 0; j--) { |
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if (freadscan(inline, hp->x, stdin) < 0) |
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quiterr("error reading RADIANCE file"); |
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if (hp->dataBits == 16) { |
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register unsigned short *dp; |
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dp = (unsigned short *)tarData + j*hp->x; |
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for (i = 0; i < hp->x; i++) { |
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*dp = ((gmap[map(colval(inline[i],RED))] |
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+(random()&7)) & 0xf8)<<7; |
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*dp |= ((gmap[map(colval(inline[i],GRN))] |
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+(random()&7)) & 0xf8)<<2; |
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*dp++ |= (gmap[map(colval(inline[i],BLU))] |
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+(random()&7))>>3; |
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} |
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} else { /* hp->dataBits == 24 */ |
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register unsigned char *dp; |
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dp = (unsigned char *)tarData + j*3*hp->x; |
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for (i = 0; i < hp->x; i++) { |
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*dp++ = gmap[map(colval(inline[i],BLU))]; |
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*dp++ = gmap[map(colval(inline[i],GRN))]; |
| 315 |
*dp++ = gmap[map(colval(inline[i],RED))]; |
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} |
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} |
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} |
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/* write out targa data */ |
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writetarga(hp, tarData, stdout); |
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|
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free((char *)inline); |
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free((char *)tarData); |
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#undef map |
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} |
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|
| 327 |
|
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writet24(h, d, fp) /* write out 24-bit targa data */ |
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struct hdStruct *h; |
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unsigned char *d; |
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FILE *fp; |
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{ |
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if (h->dataType == IM_RGB) { /* uncompressed */ |
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if (fwrite((char *)d, 3*h->x, h->y, fp) != h->y) |
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quiterr("error writing targa file"); |
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return; |
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} |
| 338 |
quiterr("unsupported output type"); |
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} |
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|
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|
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writet16(h, d, fp) /* write out 16-bit targa data */ |
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struct hdStruct *h; |
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register unsigned short *d; |
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FILE *fp; |
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{ |
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register int cnt; |
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|
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if (h->dataType == IM_RGB) { /* uncompressed */ |
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for (cnt = h->x*h->y; cnt-- > 0; ) |
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putint2(*d++, fp); |
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if (ferror(fp)) |
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quiterr("error writing targa file"); |
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return; |
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} |
| 356 |
quiterr("unsupported output type"); |
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} |
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|
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|
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readt24(h, data, fp) /* read in 24-bit targa data */ |
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register struct hdStruct *h; |
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unsigned char *data; |
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FILE *fp; |
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{ |
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register int cnt, c; |
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register unsigned char *dp; |
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int r, g, b; |
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|
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if (h->dataType == IM_RGB) { /* uncompressed */ |
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if (fread((char *)data, 3*h->x, h->y, fp) != h->y) |
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goto readerr; |
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return; |
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} |
| 374 |
for (dp = data; dp < data+3*h->x*h->y; ) { |
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if ((c = getc(fp)) == EOF) |
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goto readerr; |
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cnt = (c & 0x7f) + 1; |
| 378 |
if (c & 0x80) { /* repeated pixel */ |
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b = getc(fp); g = getc(fp); |
| 380 |
if ((r = getc(fp)) == EOF) |
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goto readerr; |
| 382 |
while (cnt--) { |
| 383 |
*dp++ = b; |
| 384 |
*dp++ = g; |
| 385 |
*dp++ = r; |
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} |
| 387 |
} else /* non-repeating pixels */ |
| 388 |
while (cnt--) { |
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*dp++ = getc(fp); *dp++ = getc(fp); |
| 390 |
if ((r = getc(fp)) == EOF) |
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goto readerr; |
| 392 |
*dp++ = r; |
| 393 |
} |
| 394 |
} |
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return; |
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readerr: |
| 397 |
quiterr("error reading targa file"); |
| 398 |
} |
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|
| 400 |
|
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readt16(h, data, fp) /* read in 16-bit targa data */ |
| 402 |
register struct hdStruct *h; |
| 403 |
unsigned short *data; |
| 404 |
FILE *fp; |
| 405 |
{ |
| 406 |
register int cnt, c; |
| 407 |
register unsigned short *dp; |
| 408 |
|
| 409 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
| 410 |
dp = data; |
| 411 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
| 412 |
*dp++ = getint2(fp); |
| 413 |
return; |
| 414 |
} |
| 415 |
for (dp = data; dp < data+h->x*h->y; ) { |
| 416 |
if ((c = getc(fp)) == EOF) |
| 417 |
goto readerr; |
| 418 |
cnt = (c & 0x7f) + 1; |
| 419 |
if (c & 0x80) { /* repeated pixel */ |
| 420 |
c = getint2(fp); |
| 421 |
while (cnt--) |
| 422 |
*dp++ = c; |
| 423 |
} else /* non-repeating pixels */ |
| 424 |
while (cnt--) |
| 425 |
*dp++ = getint2(fp); |
| 426 |
} |
| 427 |
return; |
| 428 |
readerr: |
| 429 |
quiterr("error reading targa file"); |
| 430 |
} |
