src/px/ra_t16.c

/* Copyright (c) 1986 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>

#include  "color.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();

extern double  atof(), pow();

double  gamma = 2.0;                    /* gamma correction */

char  *progname;

char  msg[128];


main(argc, argv)
int  argc;
char  *argv[];
{
        struct hdStruct  head;
        int  reverse = 0;
        int  i;
        
        progname = argv[0];

        head.dataBits = 16;
        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'g':
                                gamma = atof(argv[++i]);
                                break;
                        case 'r':
                                reverse = !reverse;
                                break;
                        case '2':
                                head.dataBits = 16;
                                break;
                        case '3':
                                head.dataBits = 24;
                                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(gamma);
                                        /* 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');
                fputresolu(YMAJOR|YDECR, head.x, head.y, stdout);
                                        /* convert file */
                tg2ra(&head);
        } else {
                if (checkheader(stdin, COLRFMT, NULL) < 0 ||
                        fgetresolu(&head.x, &head.y, stdin) != (YMAJOR|YDECR))
                        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] [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 (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");
                colrs_gambs(inl, hp->x);
                if (hp->dataBits == 16) {
                        register unsigned short  *dp;
                        dp = (unsigned short *)tarData + j*hp->x;
                        for (i = 0; i < hp->x; i++) {
                                *dp = ((inl[i][RED]+(random()&7)) & 0xf8)<<7;
                                *dp |= ((inl[i][GRN]+(random()&7)) & 0xf8)<<2;
                                *dp++ |= (inl[i][BLU]+(random()&7))>>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:	1.11
Committed:	Thu Apr 18 14:35:42 1991 UTC (33 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+3 -2 lines
Log Message:	added format information to headers
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1986 Regents of the University of California */
2
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			#include "color.h"
17
18	greg	1.5	#include "random.h"
19
20	greg	1.1	#include "targa.h"
21
22			#define goodpic(h) (((h)->dataType==IM_RGB \|\| (h)->dataType==IM_CRGB) \
23			&& ((h)->dataBits==16 \|\| (h)->dataBits==24))
24
25			#define taralloc(h) (unsigned char )emalloc((h)->x(h)->y*(h)->dataBits/8)
26
27			#define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \
28			readt24(h,d,f))
29
30			#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \
31			writet24(h,d,f))
32
33			extern char ecalloc(), emalloc();
34
35			extern double atof(), pow();
36
37			double gamma = 2.0; /* gamma correction */
38
39			char *progname;
40
41			char msg[128];
42
43
44			main(argc, argv)
45			int argc;
46			char *argv[];
47			{
48			struct hdStruct head;
49			int reverse = 0;
50			int i;
51
52			progname = argv[0];
53
54			head.dataBits = 16;
55			for (i = 1; i < argc; i++)
56			if (argv[i][0] == '-')
57			switch (argv[i][1]) {
58			case 'g':
59			gamma = atof(argv[++i]);
60			break;
61			case 'r':
62			reverse = !reverse;
63			break;
64			case '2':
65			head.dataBits = 16;
66			break;
67			case '3':
68			head.dataBits = 24;
69			break;
70			default:
71			goto userr;
72			}
73			else
74			break;
75
76			if (i < argc-2)
77			goto userr;
78			/* open input file */
79			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
80			sprintf(msg, "can't open input \"%s\"", argv[i]);
81			quiterr(msg);
82			}
83			/* open output file */
84			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
85			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
86			quiterr(msg);
87			}
88	greg	1.9	/* set gamma */
89			setcolrgam(gamma);
90	greg	1.1	/* convert */
91			if (reverse) {
92			/* get header */
93			if (getthead(&head, NULL, stdin) < 0)
94			quiterr("bad targa file");
95			if (!goodpic(&head))
96			quiterr("incompatible format");
97			/* put header */
98	greg	1.7	printargs(i, argv, stdout);
99	greg	1.11	fputformat(COLRFMT, stdout);
100	greg	1.1	putchar('\n');
101	greg	1.4	fputresolu(YMAJOR\|YDECR, head.x, head.y, stdout);
102	greg	1.1	/* convert file */
103			tg2ra(&head);
104			} else {
105	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
106			fgetresolu(&head.x, &head.y, stdin) != (YMAJOR\|YDECR))
107	greg	1.1	quiterr("bad picture file");
108			/* assign header */
109			head.textSize = 0;
110			head.mapType = CM_NOMAP;
111			head.dataType = IM_RGB;
112			head.XOffset = 0;
113			head.YOffset = 0;
114			head.imType = 0;
115			/* write header */
116			putthead(&head, NULL, stdout);
117			/* convert file */
118			ra2tg(&head);
119			}
120			exit(0);
121			userr:
122			fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma] [input [output]]\n",
123			progname);
124			exit(1);
125			}
126
127
128			int
129			getint2(fp) /* get a 2-byte positive integer */
130			register FILE *fp;
131			{
132			register int b1, b2;
133
134			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
135			quiterr("read error");
136
137			return(b1 \| b2<<8);
138			}
139
140
141			putint2(i, fp) /* put a 2-byte positive integer */
142			register int i;
143			register FILE *fp;
144			{
145			putc(i&0xff, fp);
146			putc(i>>8&0xff, fp);
147			}
148
149
150			quiterr(err) /* print message and exit */
151			char *err;
152			{
153			fprintf(stderr, "%s: %s\n", progname, err);
154			exit(1);
155			}
156
157
158			eputs(s)
159			char *s;
160			{
161			fputs(s, stderr);
162			}
163
164
165			quit(code)
166			int code;
167			{
168			exit(code);
169			}
170
171
172			getthead(hp, ip, fp) /* read header from input */
173			struct hdStruct *hp;
174			char *ip;
175			register FILE *fp;
176			{
177			int nidbytes;
178
179			if ((nidbytes = getc(fp)) == EOF)
180			return(-1);
181			hp->mapType = getc(fp);
182			hp->dataType = getc(fp);
183			hp->mapOrig = getint2(fp);
184			hp->mapLength = getint2(fp);
185			hp->CMapBits = getc(fp);
186			hp->XOffset = getint2(fp);
187			hp->YOffset = getint2(fp);
188			hp->x = getint2(fp);
189			hp->y = getint2(fp);
190			hp->dataBits = getc(fp);
191			hp->imType = getc(fp);
192
193			if (ip != NULL)
194			if (nidbytes)
195	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
196	greg	1.1	else
197			*ip = '\0';
198			else if (nidbytes)
199			fseek(fp, (long)nidbytes, 1);
200
201			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
202			}
203
204
205			putthead(hp, ip, fp) /* write header to output */
206			struct hdStruct *hp;
207			char *ip;
208			register FILE *fp;
209			{
210			if (ip != NULL)
211			putc(strlen(ip), fp);
212			else
213			putc(0, fp);
214			putc(hp->mapType, fp);
215			putc(hp->dataType, fp);
216			putint2(hp->mapOrig, fp);
217			putint2(hp->mapLength, fp);
218			putc(hp->CMapBits, fp);
219			putint2(hp->XOffset, fp);
220			putint2(hp->YOffset, fp);
221			putint2(hp->x, fp);
222			putint2(hp->y, fp);
223			putc(hp->dataBits, fp);
224			putc(hp->imType, fp);
225
226			if (ip != NULL)
227			fputs(ip, fp);
228
229			return(ferror(fp) ? -1 : 0);
230			}
231
232
233			tg2ra(hp) /* targa file to RADIANCE file */
234			struct hdStruct *hp;
235			{
236	greg	1.9	COLR *scanline;
237	greg	1.1	unsigned char *tarData;
238			register int i, j;
239			/* skip color table */
240			if (hp->mapType == CM_HASMAP)
241			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
242			/* allocate targa data */
243			tarData = taralloc(hp);
244			/* get data */
245			readtarga(hp, tarData, stdin);
246			/* allocate input scanline */
247	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
248	greg	1.1	/* convert file */
249			for (i = hp->y-1; i >= 0; i--) {
250			if (hp->dataBits == 16) {
251			register unsigned short *dp;
252			dp = (unsigned short )tarData + ihp->x;
253			for (j = 0; j < hp->x; j++) {
254	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
255			scanline[j][GRN] = *dp>>2 & 0xf8;
256			scanline[j][BLU] = *dp<<3 & 0xf8;
257	greg	1.1	dp++;
258			}
259			} else { /* hp->dataBits == 24 */
260			register unsigned char *dp;
261			dp = (unsigned char )tarData + i3*hp->x;
262			for (j = 0; j < hp->x; j++) {
263	greg	1.9	scanline[j][RED] = dp[2];
264			scanline[j][GRN] = dp[1];
265			scanline[j][BLU] = dp[0];
266	greg	1.1	dp += 3;
267			}
268			}
269	greg	1.9	gambs_colrs(scanline, hp->x);
270			if (fwritecolrs(scanline, hp->x, stdout) < 0)
271	greg	1.1	quiterr("error writing RADIANCE file");
272			}
273			free((char *)scanline);
274			free((char *)tarData);
275			}
276
277
278			ra2tg(hp) /* convert radiance to targa file */
279			struct hdStruct *hp;
280			{
281	greg	1.3	register int i, j;
282	greg	1.1	unsigned char *tarData;
283	greg	1.9	COLR *inl;
284	greg	1.1	/* allocate space for data */
285	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
286	greg	1.1	tarData = taralloc(hp);
287			/* convert file */
288			for (j = hp->y-1; j >= 0; j--) {
289	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
290	greg	1.1	quiterr("error reading RADIANCE file");
291	greg	1.9	colrs_gambs(inl, hp->x);
292	greg	1.1	if (hp->dataBits == 16) {
293			register unsigned short *dp;
294			dp = (unsigned short )tarData + jhp->x;
295			for (i = 0; i < hp->x; i++) {
296	greg	1.9	*dp = ((inl[i][RED]+(random()&7)) & 0xf8)<<7;
297			*dp \|= ((inl[i][GRN]+(random()&7)) & 0xf8)<<2;
298			*dp++ \|= (inl[i][BLU]+(random()&7))>>3;
299	greg	1.1	}
300			} else { /* hp->dataBits == 24 */
301			register unsigned char *dp;
302			dp = (unsigned char )tarData + j3*hp->x;
303			for (i = 0; i < hp->x; i++) {
304	greg	1.10	*dp++ = inl[i][BLU];
305			*dp++ = inl[i][GRN];
306	greg	1.9	*dp++ = inl[i][RED];
307	greg	1.1	}
308			}
309			}
310			/* write out targa data */
311			writetarga(hp, tarData, stdout);
312
313	greg	1.8	free((char *)inl);
314	greg	1.1	free((char *)tarData);
315			}
316
317
318			writet24(h, d, fp) /* write out 24-bit targa data */
319			struct hdStruct *h;
320			unsigned char *d;
321			FILE *fp;
322			{
323			if (h->dataType == IM_RGB) { /* uncompressed */
324	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
325	greg	1.1	quiterr("error writing targa file");
326			return;
327			}
328			quiterr("unsupported output type");
329			}
330
331
332			writet16(h, d, fp) /* write out 16-bit targa data */
333			struct hdStruct *h;
334			register unsigned short *d;
335			FILE *fp;
336			{
337			register int cnt;
338
339			if (h->dataType == IM_RGB) { /* uncompressed */
340			for (cnt = h->x*h->y; cnt-- > 0; )
341			putint2(*d++, fp);
342			if (ferror(fp))
343			quiterr("error writing targa file");
344			return;
345			}
346			quiterr("unsupported output type");
347			}
348
349
350			readt24(h, data, fp) /* read in 24-bit targa data */
351			register struct hdStruct *h;
352			unsigned char *data;
353			FILE *fp;
354			{
355			register int cnt, c;
356			register unsigned char *dp;
357			int r, g, b;
358
359			if (h->dataType == IM_RGB) { /* uncompressed */
360	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
361	greg	1.1	goto readerr;
362			return;
363			}
364			for (dp = data; dp < data+3h->xh->y; ) {
365			if ((c = getc(fp)) == EOF)
366			goto readerr;
367			cnt = (c & 0x7f) + 1;
368			if (c & 0x80) { /* repeated pixel */
369	greg	1.2	b = getc(fp); g = getc(fp);
370			if ((r = getc(fp)) == EOF)
371	greg	1.1	goto readerr;
372			while (cnt--) {
373	greg	1.2	*dp++ = b;
374			*dp++ = g;
375	greg	1.1	*dp++ = r;
376			}
377			} else /* non-repeating pixels */
378			while (cnt--) {
379			dp++ = getc(fp); dp++ = getc(fp);
380	greg	1.2	if ((r = getc(fp)) == EOF)
381	greg	1.1	goto readerr;
382	greg	1.2	*dp++ = r;
383	greg	1.1	}
384			}
385			return;
386			readerr:
387			quiterr("error reading targa file");
388			}
389
390
391			readt16(h, data, fp) /* read in 16-bit targa data */
392			register struct hdStruct *h;
393			unsigned short *data;
394			FILE *fp;
395			{
396			register int cnt, c;
397			register unsigned short *dp;
398
399			if (h->dataType == IM_RGB) { /* uncompressed */
400			dp = data;
401			for (cnt = h->x*h->y; cnt-- > 0; )
402			*dp++ = getint2(fp);
403			return;
404			}
405			for (dp = data; dp < data+h->x*h->y; ) {
406			if ((c = getc(fp)) == EOF)
407			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			}