src/px/ra_t16.c

/* Copyright (c) 1991 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ 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");
}
Revision:	2.4
Committed:	Fri Oct 30 09:11:36 1992 UTC (33 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+3 -3 lines
Log Message:	renamed gamma to avoid conflict with some math libraries
#	User	Rev	Content
1	greg	1.12	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* ra_t16.c - program to convert between RADIANCE and
9			* Targa 16, 24 and 32-bit images.
10			*
11			* 11/2/88 Adapted from ra_t8.c
12			*/
13
14			#include <stdio.h>
15
16	greg	2.3	#ifdef MSDOS
17			#include <fcntl.h>
18			#endif
19
20			#include <math.h>
21
22	greg	1.1	#include "color.h"
23
24	greg	1.15	#include "resolu.h"
25
26	greg	1.5	#include "random.h"
27
28	greg	1.1	#include "targa.h"
29
30			#define goodpic(h) (((h)->dataType==IM_RGB \|\| (h)->dataType==IM_CRGB) \
31			&& ((h)->dataBits==16 \|\| (h)->dataBits==24))
32
33			#define taralloc(h) (unsigned char )emalloc((h)->x(h)->y*(h)->dataBits/8)
34
35			#define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \
36			readt24(h,d,f))
37
38			#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \
39			writet24(h,d,f))
40
41			extern char ecalloc(), emalloc();
42
43	greg	2.4	double gamcor = 2.2; /* gamma correction */
44	greg	1.1
45	greg	1.13	int bradj = 0; /* brightness adjustment */
46
47	greg	1.1	char *progname;
48
49			char msg[128];
50
51
52			main(argc, argv)
53			int argc;
54			char *argv[];
55			{
56			struct hdStruct head;
57			int reverse = 0;
58			int i;
59	greg	2.3	#ifdef MSDOS
60			extern int _fmode;
61			_fmode = O_BINARY;
62			setmode(fileno(stdin), O_BINARY);
63			setmode(fileno(stdout), O_BINARY);
64			#endif
65	greg	1.1	progname = argv[0];
66
67			head.dataBits = 16;
68			for (i = 1; i < argc; i++)
69			if (argv[i][0] == '-')
70			switch (argv[i][1]) {
71			case 'g':
72	greg	2.4	gamcor = atof(argv[++i]);
73	greg	1.1	break;
74			case 'r':
75			reverse = !reverse;
76			break;
77			case '2':
78			head.dataBits = 16;
79			break;
80			case '3':
81			head.dataBits = 24;
82			break;
83	greg	1.13	case 'e':
84			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
85			goto userr;
86			bradj = atoi(argv[++i]);
87			break;
88	greg	1.1	default:
89			goto userr;
90			}
91			else
92			break;
93
94			if (i < argc-2)
95			goto userr;
96			/* open input file */
97			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
98			sprintf(msg, "can't open input \"%s\"", argv[i]);
99			quiterr(msg);
100			}
101			/* open output file */
102			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
103			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
104			quiterr(msg);
105			}
106	greg	1.9	/* set gamma */
107	greg	2.4	setcolrgam(gamcor);
108	greg	1.1	/* convert */
109			if (reverse) {
110			/* get header */
111			if (getthead(&head, NULL, stdin) < 0)
112			quiterr("bad targa file");
113			if (!goodpic(&head))
114			quiterr("incompatible format");
115			/* put header */
116	greg	1.7	printargs(i, argv, stdout);
117	greg	1.11	fputformat(COLRFMT, stdout);
118	greg	1.1	putchar('\n');
119	greg	1.15	fprtresolu(head.x, head.y, stdout);
120	greg	1.1	/* convert file */
121			tg2ra(&head);
122			} else {
123	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
124	greg	1.15	fgetresolu(&head.x, &head.y, stdin) < 0)
125	greg	1.1	quiterr("bad picture file");
126			/* assign header */
127			head.textSize = 0;
128			head.mapType = CM_NOMAP;
129			head.dataType = IM_RGB;
130			head.XOffset = 0;
131			head.YOffset = 0;
132			head.imType = 0;
133			/* write header */
134			putthead(&head, NULL, stdout);
135			/* convert file */
136			ra2tg(&head);
137			}
138			exit(0);
139			userr:
140	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
141	greg	1.1	progname);
142			exit(1);
143			}
144
145
146			int
147			getint2(fp) /* get a 2-byte positive integer */
148			register FILE *fp;
149			{
150			register int b1, b2;
151
152			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
153			quiterr("read error");
154
155			return(b1 \| b2<<8);
156			}
157
158
159			putint2(i, fp) /* put a 2-byte positive integer */
160			register int i;
161			register FILE *fp;
162			{
163			putc(i&0xff, fp);
164			putc(i>>8&0xff, fp);
165			}
166
167
168			quiterr(err) /* print message and exit */
169			char *err;
170			{
171			fprintf(stderr, "%s: %s\n", progname, err);
172			exit(1);
173			}
174
175
176			eputs(s)
177			char *s;
178			{
179			fputs(s, stderr);
180			}
181
182
183			quit(code)
184			int code;
185			{
186			exit(code);
187			}
188
189
190			getthead(hp, ip, fp) /* read header from input */
191			struct hdStruct *hp;
192			char *ip;
193			register FILE *fp;
194			{
195			int nidbytes;
196
197			if ((nidbytes = getc(fp)) == EOF)
198			return(-1);
199			hp->mapType = getc(fp);
200			hp->dataType = getc(fp);
201			hp->mapOrig = getint2(fp);
202			hp->mapLength = getint2(fp);
203			hp->CMapBits = getc(fp);
204			hp->XOffset = getint2(fp);
205			hp->YOffset = getint2(fp);
206			hp->x = getint2(fp);
207			hp->y = getint2(fp);
208			hp->dataBits = getc(fp);
209			hp->imType = getc(fp);
210
211			if (ip != NULL)
212			if (nidbytes)
213	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
214	greg	1.1	else
215			*ip = '\0';
216			else if (nidbytes)
217			fseek(fp, (long)nidbytes, 1);
218
219			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
220			}
221
222
223			putthead(hp, ip, fp) /* write header to output */
224			struct hdStruct *hp;
225			char *ip;
226			register FILE *fp;
227			{
228			if (ip != NULL)
229			putc(strlen(ip), fp);
230			else
231			putc(0, fp);
232			putc(hp->mapType, fp);
233			putc(hp->dataType, fp);
234			putint2(hp->mapOrig, fp);
235			putint2(hp->mapLength, fp);
236			putc(hp->CMapBits, fp);
237			putint2(hp->XOffset, fp);
238			putint2(hp->YOffset, fp);
239			putint2(hp->x, fp);
240			putint2(hp->y, fp);
241			putc(hp->dataBits, fp);
242			putc(hp->imType, fp);
243
244			if (ip != NULL)
245			fputs(ip, fp);
246
247			return(ferror(fp) ? -1 : 0);
248			}
249
250
251			tg2ra(hp) /* targa file to RADIANCE file */
252			struct hdStruct *hp;
253			{
254	greg	1.9	COLR *scanline;
255	greg	1.1	unsigned char *tarData;
256			register int i, j;
257			/* skip color table */
258			if (hp->mapType == CM_HASMAP)
259			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
260			/* allocate targa data */
261			tarData = taralloc(hp);
262			/* get data */
263			readtarga(hp, tarData, stdin);
264			/* allocate input scanline */
265	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
266	greg	1.1	/* convert file */
267			for (i = hp->y-1; i >= 0; i--) {
268			if (hp->dataBits == 16) {
269			register unsigned short *dp;
270			dp = (unsigned short )tarData + ihp->x;
271			for (j = 0; j < hp->x; j++) {
272	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
273			scanline[j][GRN] = *dp>>2 & 0xf8;
274			scanline[j][BLU] = *dp<<3 & 0xf8;
275	greg	1.1	dp++;
276			}
277			} else { /* hp->dataBits == 24 */
278			register unsigned char *dp;
279			dp = (unsigned char )tarData + i3*hp->x;
280			for (j = 0; j < hp->x; j++) {
281	greg	1.9	scanline[j][RED] = dp[2];
282			scanline[j][GRN] = dp[1];
283			scanline[j][BLU] = dp[0];
284	greg	1.1	dp += 3;
285			}
286			}
287	greg	1.9	gambs_colrs(scanline, hp->x);
288	greg	1.13	if (bradj)
289			shiftcolrs(scanline, hp->x, bradj);
290	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
291	greg	1.1	quiterr("error writing RADIANCE file");
292			}
293			free((char *)scanline);
294			free((char *)tarData);
295			}
296
297
298			ra2tg(hp) /* convert radiance to targa file */
299			struct hdStruct *hp;
300			{
301	greg	1.3	register int i, j;
302	greg	1.1	unsigned char *tarData;
303	greg	1.9	COLR *inl;
304	greg	1.1	/* allocate space for data */
305	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
306	greg	1.1	tarData = taralloc(hp);
307			/* convert file */
308			for (j = hp->y-1; j >= 0; j--) {
309	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
310	greg	1.1	quiterr("error reading RADIANCE file");
311	greg	1.13	if (bradj)
312			shiftcolrs(inl, hp->x, bradj);
313	greg	1.9	colrs_gambs(inl, hp->x);
314	greg	1.1	if (hp->dataBits == 16) {
315			register unsigned short *dp;
316	greg	1.12	register int v;
317	greg	1.1	dp = (unsigned short )tarData + jhp->x;
318			for (i = 0; i < hp->x; i++) {
319	greg	1.12	v = inl[i][RED] + (random()&7);
320			if (v > 255) v = 255;
321			*dp = (v&0xf8)<<7;
322			v = inl[i][GRN] + (random()&7);
323			if (v > 255) v = 255;
324			*dp \|= (v&0xf8)<<2;
325			v = inl[i][BLU] + (random()&7);
326			if (v > 255) v = 255;
327			*dp++ \|= v>>3;
328	greg	1.1	}
329			} else { /* hp->dataBits == 24 */
330			register unsigned char *dp;
331			dp = (unsigned char )tarData + j3*hp->x;
332			for (i = 0; i < hp->x; i++) {
333	greg	1.10	*dp++ = inl[i][BLU];
334			*dp++ = inl[i][GRN];
335	greg	1.9	*dp++ = inl[i][RED];
336	greg	1.1	}
337			}
338			}
339			/* write out targa data */
340			writetarga(hp, tarData, stdout);
341
342	greg	1.8	free((char *)inl);
343	greg	1.1	free((char *)tarData);
344			}
345
346
347			writet24(h, d, fp) /* write out 24-bit targa data */
348			struct hdStruct *h;
349			unsigned char *d;
350			FILE *fp;
351			{
352			if (h->dataType == IM_RGB) { /* uncompressed */
353	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
354	greg	1.1	quiterr("error writing targa file");
355			return;
356			}
357			quiterr("unsupported output type");
358			}
359
360
361			writet16(h, d, fp) /* write out 16-bit targa data */
362			struct hdStruct *h;
363			register unsigned short *d;
364			FILE *fp;
365			{
366			register int cnt;
367
368			if (h->dataType == IM_RGB) { /* uncompressed */
369			for (cnt = h->x*h->y; cnt-- > 0; )
370			putint2(*d++, fp);
371			if (ferror(fp))
372			quiterr("error writing targa file");
373			return;
374			}
375			quiterr("unsupported output type");
376			}
377
378
379			readt24(h, data, fp) /* read in 24-bit targa data */
380			register struct hdStruct *h;
381			unsigned char *data;
382			FILE *fp;
383			{
384			register int cnt, c;
385			register unsigned char *dp;
386			int r, g, b;
387
388			if (h->dataType == IM_RGB) { /* uncompressed */
389	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
390	greg	1.1	goto readerr;
391			return;
392			}
393			for (dp = data; dp < data+3h->xh->y; ) {
394			if ((c = getc(fp)) == EOF)
395			goto readerr;
396			cnt = (c & 0x7f) + 1;
397			if (c & 0x80) { /* repeated pixel */
398	greg	1.2	b = getc(fp); g = getc(fp);
399			if ((r = getc(fp)) == EOF)
400	greg	1.1	goto readerr;
401			while (cnt--) {
402	greg	1.2	*dp++ = b;
403			*dp++ = g;
404	greg	1.1	*dp++ = r;
405			}
406			} else /* non-repeating pixels */
407			while (cnt--) {
408			dp++ = getc(fp); dp++ = getc(fp);
409	greg	1.2	if ((r = getc(fp)) == EOF)
410	greg	1.1	goto readerr;
411	greg	1.2	*dp++ = r;
412	greg	1.1	}
413			}
414			return;
415			readerr:
416			quiterr("error reading targa file");
417			}
418
419
420			readt16(h, data, fp) /* read in 16-bit targa data */
421			register struct hdStruct *h;
422			unsigned short *data;
423			FILE *fp;
424			{
425			register int cnt, c;
426			register unsigned short *dp;
427
428			if (h->dataType == IM_RGB) { /* uncompressed */
429			dp = data;
430			for (cnt = h->x*h->y; cnt-- > 0; )
431			*dp++ = getint2(fp);
432			return;
433			}
434			for (dp = data; dp < data+h->x*h->y; ) {
435			if ((c = getc(fp)) == EOF)
436			goto readerr;
437			cnt = (c & 0x7f) + 1;
438			if (c & 0x80) { /* repeated pixel */
439			c = getint2(fp);
440			while (cnt--)
441			*dp++ = c;
442			} else /* non-repeating pixels */
443			while (cnt--)
444			*dp++ = getint2(fp);
445			}
446			return;
447			readerr:
448			quiterr("error reading targa file");
449			}