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greg |
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/* 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_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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#include <stdio.h> |
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#include "color.h" |
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#include "targa.h" |
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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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#define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8) |
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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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#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \ |
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writet24(h,d,f)) |
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extern char *ecalloc(), *emalloc(); |
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extern double atof(), pow(); |
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double gamma = 2.0; /* gamma correction */ |
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char *progname; |
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char msg[128]; |
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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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progname = argv[0]; |
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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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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(argc, argv, stdout); |
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putchar('\n'); |
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printf("-Y %d +X %d\n", head.y, head.x); |
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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 (scanf("-Y %d +X %d\n", &head.y, &head.x) != 2) |
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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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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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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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152 |
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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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} |
158 |
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159 |
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160 |
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quit(code) |
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int code; |
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{ |
163 |
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exit(code); |
164 |
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} |
165 |
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166 |
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167 |
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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; |
170 |
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register FILE *fp; |
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{ |
172 |
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int nidbytes; |
173 |
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174 |
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if ((nidbytes = getc(fp)) == EOF) |
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return(-1); |
176 |
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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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188 |
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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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199 |
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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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{ |
205 |
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if (ip != NULL) |
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putc(strlen(ip), fp); |
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else |
208 |
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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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221 |
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if (ip != NULL) |
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fputs(ip, fp); |
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224 |
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return(ferror(fp) ? -1 : 0); |
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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); |
238 |
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/* skip color table */ |
239 |
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if (hp->mapType == CM_HASMAP) |
240 |
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fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1); |
241 |
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/* allocate targa data */ |
242 |
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tarData = taralloc(hp); |
243 |
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/* get data */ |
244 |
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readtarga(hp, tarData, stdin); |
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/* allocate input scanline */ |
246 |
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scanline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
247 |
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/* convert file */ |
248 |
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for (i = hp->y-1; i >= 0; i--) { |
249 |
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if (hp->dataBits == 16) { |
250 |
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register unsigned short *dp; |
251 |
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dp = (unsigned short *)tarData + i*hp->x; |
252 |
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for (j = 0; j < hp->x; j++) { |
253 |
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setcolor(scanline[j], gmap[*dp>>7 & 0xf8], |
254 |
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gmap[*dp>>2 & 0xf8], |
255 |
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gmap[*dp<<3 & 0xf8]); |
256 |
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dp++; |
257 |
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} |
258 |
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} else { /* hp->dataBits == 24 */ |
259 |
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register unsigned char *dp; |
260 |
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dp = (unsigned char *)tarData + i*3*hp->x; |
261 |
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for (j = 0; j < hp->x; j++) { |
262 |
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setcolor(scanline[j], gmap[dp[0]], |
263 |
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gmap[dp[1]], |
264 |
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gmap[dp[2]]); |
265 |
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dp += 3; |
266 |
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} |
267 |
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} |
268 |
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if (fwritescan(scanline, hp->x, stdout) < 0) |
269 |
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quiterr("error writing RADIANCE file"); |
270 |
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} |
271 |
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free((char *)scanline); |
272 |
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free((char *)tarData); |
273 |
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} |
274 |
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275 |
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276 |
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ra2tg(hp) /* convert radiance to targa file */ |
277 |
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struct hdStruct *hp; |
278 |
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{ |
279 |
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unsigned char gmap[1024]; |
280 |
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register int i, j, c; |
281 |
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unsigned char *tarData; |
282 |
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COLOR *inline; |
283 |
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/* set up gamma correction */ |
284 |
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for (i = 0; i < 1024; i++) |
285 |
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gmap[i] = 256.*pow((i+.5)/1024., 1./gamma); |
286 |
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/* allocate space for data */ |
287 |
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inline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
288 |
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tarData = taralloc(hp); |
289 |
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/* convert file */ |
290 |
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for (j = hp->y-1; j >= 0; j--) { |
291 |
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if (freadscan(inline, hp->x, stdin) < 0) |
292 |
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quiterr("error reading RADIANCE file"); |
293 |
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if (hp->dataBits == 16) { |
294 |
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register unsigned short *dp; |
295 |
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dp = (unsigned short *)tarData + j*hp->x; |
296 |
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for (i = 0; i < hp->x; i++) { |
297 |
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c = 1024.*colval(inline[i],RED); |
298 |
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if (c > 1023) c = 1023; |
299 |
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*dp = (gmap[c] & 0xf8)<<7; |
300 |
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c = 1024.*colval(inline[i],GRN); |
301 |
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if (c > 1023) c = 1023; |
302 |
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*dp |= (gmap[c] & 0xf8)<<2; |
303 |
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c = 1024.*colval(inline[i],BLU); |
304 |
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if (c > 1023) c = 1023; |
305 |
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*dp++ |= gmap[c]>>3; |
306 |
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} |
307 |
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} else { /* hp->dataBits == 24 */ |
308 |
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register unsigned char *dp; |
309 |
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dp = (unsigned char *)tarData + j*3*hp->x; |
310 |
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for (i = 0; i < hp->x; i++) { |
311 |
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c = 1024.*colval(inline[i],RED); |
312 |
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if (c > 1023) c = 1023; |
313 |
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*dp++ = gmap[c]; |
314 |
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c = 1024.*colval(inline[i],GRN); |
315 |
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if (c > 1023) c = 1023; |
316 |
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*dp++ = gmap[c]; |
317 |
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c = 1024.*colval(inline[i],BLU); |
318 |
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if (c > 1023) c = 1023; |
319 |
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*dp++ = gmap[c]; |
320 |
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} |
321 |
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} |
322 |
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} |
323 |
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/* write out targa data */ |
324 |
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writetarga(hp, tarData, stdout); |
325 |
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326 |
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free((char *)inline); |
327 |
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free((char *)tarData); |
328 |
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} |
329 |
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330 |
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331 |
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writet24(h, d, fp) /* write out 24-bit targa data */ |
332 |
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struct hdStruct *h; |
333 |
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unsigned char *d; |
334 |
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FILE *fp; |
335 |
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{ |
336 |
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if (h->dataType == IM_RGB) { /* uncompressed */ |
337 |
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if (fwrite(d, 3*h->x, h->y, fp) != h->y) |
338 |
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quiterr("error writing targa file"); |
339 |
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return; |
340 |
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} |
341 |
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quiterr("unsupported output type"); |
342 |
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} |
343 |
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344 |
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345 |
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writet16(h, d, fp) /* write out 16-bit targa data */ |
346 |
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struct hdStruct *h; |
347 |
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register unsigned short *d; |
348 |
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FILE *fp; |
349 |
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{ |
350 |
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register int cnt; |
351 |
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|
352 |
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if (h->dataType == IM_RGB) { /* uncompressed */ |
353 |
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for (cnt = h->x*h->y; cnt-- > 0; ) |
354 |
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putint2(*d++, fp); |
355 |
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if (ferror(fp)) |
356 |
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quiterr("error writing targa file"); |
357 |
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return; |
358 |
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} |
359 |
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quiterr("unsupported output type"); |
360 |
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} |
361 |
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362 |
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363 |
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readt24(h, data, fp) /* read in 24-bit targa data */ |
364 |
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register struct hdStruct *h; |
365 |
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unsigned char *data; |
366 |
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FILE *fp; |
367 |
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{ |
368 |
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register int cnt, c; |
369 |
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register unsigned char *dp; |
370 |
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int r, g, b; |
371 |
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372 |
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if (h->dataType == IM_RGB) { /* uncompressed */ |
373 |
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if (fread(data, 3*h->x, h->y, fp) != h->y) |
374 |
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goto readerr; |
375 |
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return; |
376 |
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} |
377 |
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for (dp = data; dp < data+3*h->x*h->y; ) { |
378 |
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if ((c = getc(fp)) == EOF) |
379 |
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goto readerr; |
380 |
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cnt = (c & 0x7f) + 1; |
381 |
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if (c & 0x80) { /* repeated pixel */ |
382 |
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r = getc(fp); g = getc(fp); |
383 |
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if ((b = getc(fp)) == EOF) |
384 |
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goto readerr; |
385 |
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while (cnt--) { |
386 |
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*dp++ = r; |
387 |
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*dp++ = g; |
388 |
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*dp++ = b; |
389 |
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} |
390 |
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} else /* non-repeating pixels */ |
391 |
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while (cnt--) { |
392 |
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*dp++ = getc(fp); *dp++ = getc(fp); |
393 |
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if ((b = getc(fp)) == EOF) |
394 |
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goto readerr; |
395 |
|
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*dp++ = b; |
396 |
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} |
397 |
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} |
398 |
|
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return; |
399 |
|
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readerr: |
400 |
|
|
quiterr("error reading targa file"); |
401 |
|
|
} |
402 |
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|
403 |
|
|
|
404 |
|
|
readt16(h, data, fp) /* read in 16-bit targa data */ |
405 |
|
|
register struct hdStruct *h; |
406 |
|
|
unsigned short *data; |
407 |
|
|
FILE *fp; |
408 |
|
|
{ |
409 |
|
|
register int cnt, c; |
410 |
|
|
register unsigned short *dp; |
411 |
|
|
|
412 |
|
|
if (h->dataType == IM_RGB) { /* uncompressed */ |
413 |
|
|
dp = data; |
414 |
|
|
for (cnt = h->x*h->y; cnt-- > 0; ) |
415 |
|
|
*dp++ = getint2(fp); |
416 |
|
|
return; |
417 |
|
|
} |
418 |
|
|
for (dp = data; dp < data+h->x*h->y; ) { |
419 |
|
|
if ((c = getc(fp)) == EOF) |
420 |
|
|
goto readerr; |
421 |
|
|
cnt = (c & 0x7f) + 1; |
422 |
|
|
if (c & 0x80) { /* repeated pixel */ |
423 |
|
|
c = getint2(fp); |
424 |
|
|
while (cnt--) |
425 |
|
|
*dp++ = c; |
426 |
|
|
} else /* non-repeating pixels */ |
427 |
|
|
while (cnt--) |
428 |
|
|
*dp++ = getint2(fp); |
429 |
|
|
} |
430 |
|
|
return; |
431 |
|
|
readerr: |
432 |
|
|
quiterr("error reading targa file"); |
433 |
|
|
} |