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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 |
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* 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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/* set gamma */ |
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setcolrgam(gamma); |
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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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fputformat(COLRFMT, 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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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
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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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COLR *scanline; |
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unsigned char *tarData; |
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register int i, j; |
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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 = (COLR *)emalloc(hp->x*sizeof(COLR)); |
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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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scanline[j][RED] = *dp>>7 & 0xf8; |
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scanline[j][GRN] = *dp>>2 & 0xf8; |
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scanline[j][BLU] = *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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scanline[j][RED] = dp[2]; |
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scanline[j][GRN] = dp[1]; |
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scanline[j][BLU] = dp[0]; |
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dp += 3; |
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} |
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} |
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gambs_colrs(scanline, hp->x); |
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if (fwritecolrs(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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register int i, j; |
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unsigned char *tarData; |
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COLR *inl; |
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/* allocate space for data */ |
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inl = (COLR *)emalloc(hp->x*sizeof(COLR)); |
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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 (freadcolrs(inl, hp->x, stdin) < 0) |
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quiterr("error reading RADIANCE file"); |
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colrs_gambs(inl, hp->x); |
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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 = ((inl[i][RED]+(random()&7)) & 0xf8)<<7; |
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*dp |= ((inl[i][GRN]+(random()&7)) & 0xf8)<<2; |
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*dp++ |= (inl[i][BLU]+(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++ = inl[i][BLU]; |
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*dp++ = inl[i][GRN]; |
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*dp++ = inl[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 *)inl); |
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free((char *)tarData); |
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} |
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|
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|
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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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} |
| 328 |
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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} |
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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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} |
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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; |
| 368 |
if (c & 0x80) { /* repeated pixel */ |
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b = getc(fp); g = getc(fp); |
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if ((r = getc(fp)) == EOF) |
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goto readerr; |
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while (cnt--) { |
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*dp++ = b; |
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*dp++ = g; |
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*dp++ = r; |
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} |
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} else /* non-repeating pixels */ |
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while (cnt--) { |
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*dp++ = getc(fp); *dp++ = getc(fp); |
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if ((r = getc(fp)) == EOF) |
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goto readerr; |
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*dp++ = r; |
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} |
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} |
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return; |
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readerr: |
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quiterr("error reading targa file"); |
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} |
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|
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|
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readt16(h, data, fp) /* read in 16-bit targa data */ |
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register struct hdStruct *h; |
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unsigned short *data; |
| 394 |
FILE *fp; |
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{ |
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register int cnt, c; |
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register unsigned short *dp; |
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|
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if (h->dataType == IM_RGB) { /* uncompressed */ |
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dp = data; |
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for (cnt = h->x*h->y; cnt-- > 0; ) |
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*dp++ = getint2(fp); |
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return; |
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} |
| 405 |
for (dp = data; dp < data+h->x*h->y; ) { |
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if ((c = getc(fp)) == EOF) |
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goto readerr; |
| 408 |
cnt = (c & 0x7f) + 1; |
| 409 |
if (c & 0x80) { /* repeated pixel */ |
| 410 |
c = getint2(fp); |
| 411 |
while (cnt--) |
| 412 |
*dp++ = c; |
| 413 |
} else /* non-repeating pixels */ |
| 414 |
while (cnt--) |
| 415 |
*dp++ = getint2(fp); |
| 416 |
} |
| 417 |
return; |
| 418 |
readerr: |
| 419 |
quiterr("error reading targa file"); |
| 420 |
} |
