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- /* Copyright (c) 1991 Regents of the University of California */
-
- #ifndef lint
- static char SCCSid[] = "@(#)ra_t16.c 2.4 10/30/92 LBL";
- #endif
-
- /*
- * ra_t16.c - program to convert between RADIANCE and
- * Targa 16, 24 and 32-bit images.
- *
- * 11/2/88 Adapted from ra_t8.c
- */
-
- #include <stdio.h>
-
- #ifdef MSDOS
- #include <fcntl.h>
- #endif
-
- #include <math.h>
-
- #include "color.h"
-
- #include "resolu.h"
-
- #include "random.h"
-
- #include "targa.h"
-
- #define goodpic(h) (((h)->dataType==IM_RGB || (h)->dataType==IM_CRGB) \
- && ((h)->dataBits==16 || (h)->dataBits==24))
-
- #define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8)
-
- #define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \
- readt24(h,d,f))
-
- #define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \
- writet24(h,d,f))
-
- extern char *ecalloc(), *emalloc();
-
- double gamcor = 2.2; /* gamma correction */
-
- int bradj = 0; /* brightness adjustment */
-
- char *progname;
-
- char msg[128];
-
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- struct hdStruct head;
- int reverse = 0;
- int i;
- #ifdef MSDOS
- extern int _fmode;
- _fmode = O_BINARY;
- setmode(fileno(stdin), O_BINARY);
- setmode(fileno(stdout), O_BINARY);
- #endif
- progname = argv[0];
-
- head.dataBits = 16;
- for (i = 1; i < argc; i++)
- if (argv[i][0] == '-')
- switch (argv[i][1]) {
- case 'g':
- gamcor = atof(argv[++i]);
- break;
- case 'r':
- reverse = !reverse;
- break;
- case '2':
- head.dataBits = 16;
- break;
- case '3':
- head.dataBits = 24;
- break;
- case 'e':
- if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
- goto userr;
- bradj = atoi(argv[++i]);
- break;
- default:
- goto userr;
- }
- else
- break;
-
- if (i < argc-2)
- goto userr;
- /* open input file */
- if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
- sprintf(msg, "can't open input \"%s\"", argv[i]);
- quiterr(msg);
- }
- /* open output file */
- if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
- sprintf(msg, "can't open output \"%s\"", argv[i+1]);
- quiterr(msg);
- }
- /* set gamma */
- setcolrgam(gamcor);
- /* convert */
- if (reverse) {
- /* get header */
- if (getthead(&head, NULL, stdin) < 0)
- quiterr("bad targa file");
- if (!goodpic(&head))
- quiterr("incompatible format");
- /* put header */
- printargs(i, argv, stdout);
- fputformat(COLRFMT, stdout);
- putchar('\n');
- fprtresolu(head.x, head.y, stdout);
- /* convert file */
- tg2ra(&head);
- } else {
- if (checkheader(stdin, COLRFMT, NULL) < 0 ||
- fgetresolu(&head.x, &head.y, stdin) < 0)
- quiterr("bad picture file");
- /* assign header */
- head.textSize = 0;
- head.mapType = CM_NOMAP;
- head.dataType = IM_RGB;
- head.XOffset = 0;
- head.YOffset = 0;
- head.imType = 0;
- /* write header */
- putthead(&head, NULL, stdout);
- /* convert file */
- ra2tg(&head);
- }
- exit(0);
- userr:
- fprintf(stderr, "Usage: %s [-2|-3|-r][-g gamma][-e +/-stops] [input [output]]\n",
- progname);
- exit(1);
- }
-
-
- int
- getint2(fp) /* get a 2-byte positive integer */
- register FILE *fp;
- {
- register int b1, b2;
-
- if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF)
- quiterr("read error");
-
- return(b1 | b2<<8);
- }
-
-
- putint2(i, fp) /* put a 2-byte positive integer */
- register int i;
- register FILE *fp;
- {
- putc(i&0xff, fp);
- putc(i>>8&0xff, fp);
- }
-
-
- quiterr(err) /* print message and exit */
- char *err;
- {
- fprintf(stderr, "%s: %s\n", progname, err);
- exit(1);
- }
-
-
- eputs(s)
- char *s;
- {
- fputs(s, stderr);
- }
-
-
- quit(code)
- int code;
- {
- exit(code);
- }
-
-
- getthead(hp, ip, fp) /* read header from input */
- struct hdStruct *hp;
- char *ip;
- register FILE *fp;
- {
- int nidbytes;
-
- if ((nidbytes = getc(fp)) == EOF)
- return(-1);
- hp->mapType = getc(fp);
- hp->dataType = getc(fp);
- hp->mapOrig = getint2(fp);
- hp->mapLength = getint2(fp);
- hp->CMapBits = getc(fp);
- hp->XOffset = getint2(fp);
- hp->YOffset = getint2(fp);
- hp->x = getint2(fp);
- hp->y = getint2(fp);
- hp->dataBits = getc(fp);
- hp->imType = getc(fp);
-
- if (ip != NULL)
- if (nidbytes)
- fread((char *)ip, nidbytes, 1, fp);
- else
- *ip = '\0';
- else if (nidbytes)
- fseek(fp, (long)nidbytes, 1);
-
- return(feof(fp) || ferror(fp) ? -1 : 0);
- }
-
-
- putthead(hp, ip, fp) /* write header to output */
- struct hdStruct *hp;
- char *ip;
- register FILE *fp;
- {
- if (ip != NULL)
- putc(strlen(ip), fp);
- else
- putc(0, fp);
- putc(hp->mapType, fp);
- putc(hp->dataType, fp);
- putint2(hp->mapOrig, fp);
- putint2(hp->mapLength, fp);
- putc(hp->CMapBits, fp);
- putint2(hp->XOffset, fp);
- putint2(hp->YOffset, fp);
- putint2(hp->x, fp);
- putint2(hp->y, fp);
- putc(hp->dataBits, fp);
- putc(hp->imType, fp);
-
- if (ip != NULL)
- fputs(ip, fp);
-
- return(ferror(fp) ? -1 : 0);
- }
-
-
- tg2ra(hp) /* targa file to RADIANCE file */
- struct hdStruct *hp;
- {
- COLR *scanline;
- unsigned char *tarData;
- register int i, j;
- /* skip color table */
- if (hp->mapType == CM_HASMAP)
- fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
- /* allocate targa data */
- tarData = taralloc(hp);
- /* get data */
- readtarga(hp, tarData, stdin);
- /* allocate input scanline */
- scanline = (COLR *)emalloc(hp->x*sizeof(COLR));
- /* convert file */
- for (i = hp->y-1; i >= 0; i--) {
- if (hp->dataBits == 16) {
- register unsigned short *dp;
- dp = (unsigned short *)tarData + i*hp->x;
- for (j = 0; j < hp->x; j++) {
- scanline[j][RED] = *dp>>7 & 0xf8;
- scanline[j][GRN] = *dp>>2 & 0xf8;
- scanline[j][BLU] = *dp<<3 & 0xf8;
- dp++;
- }
- } else { /* hp->dataBits == 24 */
- register unsigned char *dp;
- dp = (unsigned char *)tarData + i*3*hp->x;
- for (j = 0; j < hp->x; j++) {
- scanline[j][RED] = dp[2];
- scanline[j][GRN] = dp[1];
- scanline[j][BLU] = dp[0];
- dp += 3;
- }
- }
- gambs_colrs(scanline, hp->x);
- if (bradj)
- shiftcolrs(scanline, hp->x, bradj);
- if (fwritecolrs(scanline, hp->x, stdout) < 0)
- quiterr("error writing RADIANCE file");
- }
- free((char *)scanline);
- free((char *)tarData);
- }
-
-
- ra2tg(hp) /* convert radiance to targa file */
- struct hdStruct *hp;
- {
- register int i, j;
- unsigned char *tarData;
- COLR *inl;
- /* allocate space for data */
- inl = (COLR *)emalloc(hp->x*sizeof(COLR));
- tarData = taralloc(hp);
- /* convert file */
- for (j = hp->y-1; j >= 0; j--) {
- if (freadcolrs(inl, hp->x, stdin) < 0)
- quiterr("error reading RADIANCE file");
- if (bradj)
- shiftcolrs(inl, hp->x, bradj);
- colrs_gambs(inl, hp->x);
- if (hp->dataBits == 16) {
- register unsigned short *dp;
- register int v;
- dp = (unsigned short *)tarData + j*hp->x;
- for (i = 0; i < hp->x; i++) {
- v = inl[i][RED] + (random()&7);
- if (v > 255) v = 255;
- *dp = (v&0xf8)<<7;
- v = inl[i][GRN] + (random()&7);
- if (v > 255) v = 255;
- *dp |= (v&0xf8)<<2;
- v = inl[i][BLU] + (random()&7);
- if (v > 255) v = 255;
- *dp++ |= v>>3;
- }
- } else { /* hp->dataBits == 24 */
- register unsigned char *dp;
- dp = (unsigned char *)tarData + j*3*hp->x;
- for (i = 0; i < hp->x; i++) {
- *dp++ = inl[i][BLU];
- *dp++ = inl[i][GRN];
- *dp++ = inl[i][RED];
- }
- }
- }
- /* write out targa data */
- writetarga(hp, tarData, stdout);
-
- free((char *)inl);
- free((char *)tarData);
- }
-
-
- writet24(h, d, fp) /* write out 24-bit targa data */
- struct hdStruct *h;
- unsigned char *d;
- FILE *fp;
- {
- if (h->dataType == IM_RGB) { /* uncompressed */
- if (fwrite((char *)d, 3*h->x, h->y, fp) != h->y)
- quiterr("error writing targa file");
- return;
- }
- quiterr("unsupported output type");
- }
-
-
- writet16(h, d, fp) /* write out 16-bit targa data */
- struct hdStruct *h;
- register unsigned short *d;
- FILE *fp;
- {
- register int cnt;
-
- if (h->dataType == IM_RGB) { /* uncompressed */
- for (cnt = h->x*h->y; cnt-- > 0; )
- putint2(*d++, fp);
- if (ferror(fp))
- quiterr("error writing targa file");
- return;
- }
- quiterr("unsupported output type");
- }
-
-
- readt24(h, data, fp) /* read in 24-bit targa data */
- register struct hdStruct *h;
- unsigned char *data;
- FILE *fp;
- {
- register int cnt, c;
- register unsigned char *dp;
- int r, g, b;
-
- if (h->dataType == IM_RGB) { /* uncompressed */
- if (fread((char *)data, 3*h->x, h->y, fp) != h->y)
- goto readerr;
- return;
- }
- for (dp = data; dp < data+3*h->x*h->y; ) {
- if ((c = getc(fp)) == EOF)
- goto readerr;
- cnt = (c & 0x7f) + 1;
- if (c & 0x80) { /* repeated pixel */
- b = getc(fp); g = getc(fp);
- if ((r = getc(fp)) == EOF)
- goto readerr;
- while (cnt--) {
- *dp++ = b;
- *dp++ = g;
- *dp++ = r;
- }
- } else /* non-repeating pixels */
- while (cnt--) {
- *dp++ = getc(fp); *dp++ = getc(fp);
- if ((r = getc(fp)) == EOF)
- goto readerr;
- *dp++ = r;
- }
- }
- return;
- readerr:
- quiterr("error reading targa file");
- }
-
-
- readt16(h, data, fp) /* read in 16-bit targa data */
- register struct hdStruct *h;
- unsigned short *data;
- FILE *fp;
- {
- register int cnt, c;
- register unsigned short *dp;
-
- if (h->dataType == IM_RGB) { /* uncompressed */
- dp = data;
- for (cnt = h->x*h->y; cnt-- > 0; )
- *dp++ = getint2(fp);
- return;
- }
- for (dp = data; dp < data+h->x*h->y; ) {
- if ((c = getc(fp)) == EOF)
- goto readerr;
- cnt = (c & 0x7f) + 1;
- if (c & 0x80) { /* repeated pixel */
- c = getint2(fp);
- while (cnt--)
- *dp++ = c;
- } else /* non-repeating pixels */
- while (cnt--)
- *dp++ = getint2(fp);
- }
- return;
- readerr:
- quiterr("error reading targa file");
- }
-