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>

#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 */

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;
        
        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;
                        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(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][-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:	1.13
Committed:	Wed Aug 7 08:36:35 1991 UTC (32 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+12 -1 lines
Log Message:	added -e +/-stops option
#	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			#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	greg	1.13	int bradj = 0; /* brightness adjustment */
40
41	greg	1.1	char *progname;
42
43			char msg[128];
44
45
46			main(argc, argv)
47			int argc;
48			char *argv[];
49			{
50			struct hdStruct head;
51			int reverse = 0;
52			int i;
53
54			progname = argv[0];
55
56			head.dataBits = 16;
57			for (i = 1; i < argc; i++)
58			if (argv[i][0] == '-')
59			switch (argv[i][1]) {
60			case 'g':
61			gamma = atof(argv[++i]);
62			break;
63			case 'r':
64			reverse = !reverse;
65			break;
66			case '2':
67			head.dataBits = 16;
68			break;
69			case '3':
70			head.dataBits = 24;
71			break;
72	greg	1.13	case 'e':
73			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
74			goto userr;
75			bradj = atoi(argv[++i]);
76			break;
77	greg	1.1	default:
78			goto userr;
79			}
80			else
81			break;
82
83			if (i < argc-2)
84			goto userr;
85			/* open input file */
86			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
87			sprintf(msg, "can't open input \"%s\"", argv[i]);
88			quiterr(msg);
89			}
90			/* open output file */
91			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
92			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
93			quiterr(msg);
94			}
95	greg	1.9	/* set gamma */
96			setcolrgam(gamma);
97	greg	1.1	/* convert */
98			if (reverse) {
99			/* get header */
100			if (getthead(&head, NULL, stdin) < 0)
101			quiterr("bad targa file");
102			if (!goodpic(&head))
103			quiterr("incompatible format");
104			/* put header */
105	greg	1.7	printargs(i, argv, stdout);
106	greg	1.11	fputformat(COLRFMT, stdout);
107	greg	1.1	putchar('\n');
108	greg	1.4	fputresolu(YMAJOR\|YDECR, head.x, head.y, stdout);
109	greg	1.1	/* convert file */
110			tg2ra(&head);
111			} else {
112	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
113			fgetresolu(&head.x, &head.y, stdin) != (YMAJOR\|YDECR))
114	greg	1.1	quiterr("bad picture file");
115			/* assign header */
116			head.textSize = 0;
117			head.mapType = CM_NOMAP;
118			head.dataType = IM_RGB;
119			head.XOffset = 0;
120			head.YOffset = 0;
121			head.imType = 0;
122			/* write header */
123			putthead(&head, NULL, stdout);
124			/* convert file */
125			ra2tg(&head);
126			}
127			exit(0);
128			userr:
129	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
130	greg	1.1	progname);
131			exit(1);
132			}
133
134
135			int
136			getint2(fp) /* get a 2-byte positive integer */
137			register FILE *fp;
138			{
139			register int b1, b2;
140
141			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
142			quiterr("read error");
143
144			return(b1 \| b2<<8);
145			}
146
147
148			putint2(i, fp) /* put a 2-byte positive integer */
149			register int i;
150			register FILE *fp;
151			{
152			putc(i&0xff, fp);
153			putc(i>>8&0xff, fp);
154			}
155
156
157			quiterr(err) /* print message and exit */
158			char *err;
159			{
160			fprintf(stderr, "%s: %s\n", progname, err);
161			exit(1);
162			}
163
164
165			eputs(s)
166			char *s;
167			{
168			fputs(s, stderr);
169			}
170
171
172			quit(code)
173			int code;
174			{
175			exit(code);
176			}
177
178
179			getthead(hp, ip, fp) /* read header from input */
180			struct hdStruct *hp;
181			char *ip;
182			register FILE *fp;
183			{
184			int nidbytes;
185
186			if ((nidbytes = getc(fp)) == EOF)
187			return(-1);
188			hp->mapType = getc(fp);
189			hp->dataType = getc(fp);
190			hp->mapOrig = getint2(fp);
191			hp->mapLength = getint2(fp);
192			hp->CMapBits = getc(fp);
193			hp->XOffset = getint2(fp);
194			hp->YOffset = getint2(fp);
195			hp->x = getint2(fp);
196			hp->y = getint2(fp);
197			hp->dataBits = getc(fp);
198			hp->imType = getc(fp);
199
200			if (ip != NULL)
201			if (nidbytes)
202	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
203	greg	1.1	else
204			*ip = '\0';
205			else if (nidbytes)
206			fseek(fp, (long)nidbytes, 1);
207
208			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
209			}
210
211
212			putthead(hp, ip, fp) /* write header to output */
213			struct hdStruct *hp;
214			char *ip;
215			register FILE *fp;
216			{
217			if (ip != NULL)
218			putc(strlen(ip), fp);
219			else
220			putc(0, fp);
221			putc(hp->mapType, fp);
222			putc(hp->dataType, fp);
223			putint2(hp->mapOrig, fp);
224			putint2(hp->mapLength, fp);
225			putc(hp->CMapBits, fp);
226			putint2(hp->XOffset, fp);
227			putint2(hp->YOffset, fp);
228			putint2(hp->x, fp);
229			putint2(hp->y, fp);
230			putc(hp->dataBits, fp);
231			putc(hp->imType, fp);
232
233			if (ip != NULL)
234			fputs(ip, fp);
235
236			return(ferror(fp) ? -1 : 0);
237			}
238
239
240			tg2ra(hp) /* targa file to RADIANCE file */
241			struct hdStruct *hp;
242			{
243	greg	1.9	COLR *scanline;
244	greg	1.1	unsigned char *tarData;
245			register int i, j;
246			/* skip color table */
247			if (hp->mapType == CM_HASMAP)
248			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
249			/* allocate targa data */
250			tarData = taralloc(hp);
251			/* get data */
252			readtarga(hp, tarData, stdin);
253			/* allocate input scanline */
254	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
255	greg	1.1	/* convert file */
256			for (i = hp->y-1; i >= 0; i--) {
257			if (hp->dataBits == 16) {
258			register unsigned short *dp;
259			dp = (unsigned short )tarData + ihp->x;
260			for (j = 0; j < hp->x; j++) {
261	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
262			scanline[j][GRN] = *dp>>2 & 0xf8;
263			scanline[j][BLU] = *dp<<3 & 0xf8;
264	greg	1.1	dp++;
265			}
266			} else { /* hp->dataBits == 24 */
267			register unsigned char *dp;
268			dp = (unsigned char )tarData + i3*hp->x;
269			for (j = 0; j < hp->x; j++) {
270	greg	1.9	scanline[j][RED] = dp[2];
271			scanline[j][GRN] = dp[1];
272			scanline[j][BLU] = dp[0];
273	greg	1.1	dp += 3;
274			}
275			}
276	greg	1.9	gambs_colrs(scanline, hp->x);
277	greg	1.13	if (bradj)
278			shiftcolrs(scanline, hp->x, bradj);
279	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
280	greg	1.1	quiterr("error writing RADIANCE file");
281			}
282			free((char *)scanline);
283			free((char *)tarData);
284			}
285
286
287			ra2tg(hp) /* convert radiance to targa file */
288			struct hdStruct *hp;
289			{
290	greg	1.3	register int i, j;
291	greg	1.1	unsigned char *tarData;
292	greg	1.9	COLR *inl;
293	greg	1.1	/* allocate space for data */
294	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
295	greg	1.1	tarData = taralloc(hp);
296			/* convert file */
297			for (j = hp->y-1; j >= 0; j--) {
298	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
299	greg	1.1	quiterr("error reading RADIANCE file");
300	greg	1.13	if (bradj)
301			shiftcolrs(inl, hp->x, bradj);
302	greg	1.9	colrs_gambs(inl, hp->x);
303	greg	1.1	if (hp->dataBits == 16) {
304			register unsigned short *dp;
305	greg	1.12	register int v;
306	greg	1.1	dp = (unsigned short )tarData + jhp->x;
307			for (i = 0; i < hp->x; i++) {
308	greg	1.12	v = inl[i][RED] + (random()&7);
309			if (v > 255) v = 255;
310			*dp = (v&0xf8)<<7;
311			v = inl[i][GRN] + (random()&7);
312			if (v > 255) v = 255;
313			*dp \|= (v&0xf8)<<2;
314			v = inl[i][BLU] + (random()&7);
315			if (v > 255) v = 255;
316			*dp++ \|= v>>3;
317	greg	1.1	}
318			} else { /* hp->dataBits == 24 */
319			register unsigned char *dp;
320			dp = (unsigned char )tarData + j3*hp->x;
321			for (i = 0; i < hp->x; i++) {
322	greg	1.10	*dp++ = inl[i][BLU];
323			*dp++ = inl[i][GRN];
324	greg	1.9	*dp++ = inl[i][RED];
325	greg	1.1	}
326			}
327			}
328			/* write out targa data */
329			writetarga(hp, tarData, stdout);
330
331	greg	1.8	free((char *)inl);
332	greg	1.1	free((char *)tarData);
333			}
334
335
336			writet24(h, d, fp) /* write out 24-bit targa data */
337			struct hdStruct *h;
338			unsigned char *d;
339			FILE *fp;
340			{
341			if (h->dataType == IM_RGB) { /* uncompressed */
342	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
343	greg	1.1	quiterr("error writing targa file");
344			return;
345			}
346			quiterr("unsupported output type");
347			}
348
349
350			writet16(h, d, fp) /* write out 16-bit targa data */
351			struct hdStruct *h;
352			register unsigned short *d;
353			FILE *fp;
354			{
355			register int cnt;
356
357			if (h->dataType == IM_RGB) { /* uncompressed */
358			for (cnt = h->x*h->y; cnt-- > 0; )
359			putint2(*d++, fp);
360			if (ferror(fp))
361			quiterr("error writing targa file");
362			return;
363			}
364			quiterr("unsupported output type");
365			}
366
367
368			readt24(h, data, fp) /* read in 24-bit targa data */
369			register struct hdStruct *h;
370			unsigned char *data;
371			FILE *fp;
372			{
373			register int cnt, c;
374			register unsigned char *dp;
375			int r, g, b;
376
377			if (h->dataType == IM_RGB) { /* uncompressed */
378	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
379	greg	1.1	goto readerr;
380			return;
381			}
382			for (dp = data; dp < data+3h->xh->y; ) {
383			if ((c = getc(fp)) == EOF)
384			goto readerr;
385			cnt = (c & 0x7f) + 1;
386			if (c & 0x80) { /* repeated pixel */
387	greg	1.2	b = getc(fp); g = getc(fp);
388			if ((r = getc(fp)) == EOF)
389	greg	1.1	goto readerr;
390			while (cnt--) {
391	greg	1.2	*dp++ = b;
392			*dp++ = g;
393	greg	1.1	*dp++ = r;
394			}
395			} else /* non-repeating pixels */
396			while (cnt--) {
397			dp++ = getc(fp); dp++ = getc(fp);
398	greg	1.2	if ((r = getc(fp)) == EOF)
399	greg	1.1	goto readerr;
400	greg	1.2	*dp++ = r;
401	greg	1.1	}
402			}
403			return;
404			readerr:
405			quiterr("error reading targa file");
406			}
407
408
409			readt16(h, data, fp) /* read in 16-bit targa data */
410			register struct hdStruct *h;
411			unsigned short *data;
412			FILE *fp;
413			{
414			register int cnt, c;
415			register unsigned short *dp;
416
417			if (h->dataType == IM_RGB) { /* uncompressed */
418			dp = data;
419			for (cnt = h->x*h->y; cnt-- > 0; )
420			*dp++ = getint2(fp);
421			return;
422			}
423			for (dp = data; dp < data+h->x*h->y; ) {
424			if ((c = getc(fp)) == EOF)
425			goto readerr;
426			cnt = (c & 0x7f) + 1;
427			if (c & 0x80) { /* repeated pixel */
428			c = getint2(fp);
429			while (cnt--)
430			*dp++ = c;
431			} else /* non-repeating pixels */
432			while (cnt--)
433			*dp++ = getint2(fp);
434			}
435			return;
436			readerr:
437			quiterr("error reading targa file");
438			}