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  "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();

extern double  atof(), pow();

double  gamma = 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;
        
        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');
                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:	2.1
Committed:	Tue Nov 12 16:04:21 1991 UTC (32 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+0 -0 lines
Log Message:	updated revision number for release 2.0
#	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	1.15	#include "resolu.h"
19
20	greg	1.5	#include "random.h"
21
22	greg	1.1	#include "targa.h"
23
24			#define goodpic(h) (((h)->dataType==IM_RGB \|\| (h)->dataType==IM_CRGB) \
25			&& ((h)->dataBits==16 \|\| (h)->dataBits==24))
26
27			#define taralloc(h) (unsigned char )emalloc((h)->x(h)->y*(h)->dataBits/8)
28
29			#define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \
30			readt24(h,d,f))
31
32			#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \
33			writet24(h,d,f))
34
35			extern char ecalloc(), emalloc();
36
37			extern double atof(), pow();
38
39	greg	1.14	double gamma = 2.2; /* gamma correction */
40	greg	1.1
41	greg	1.13	int bradj = 0; /* brightness adjustment */
42
43	greg	1.1	char *progname;
44
45			char msg[128];
46
47
48			main(argc, argv)
49			int argc;
50			char *argv[];
51			{
52			struct hdStruct head;
53			int reverse = 0;
54			int i;
55
56			progname = argv[0];
57
58			head.dataBits = 16;
59			for (i = 1; i < argc; i++)
60			if (argv[i][0] == '-')
61			switch (argv[i][1]) {
62			case 'g':
63			gamma = atof(argv[++i]);
64			break;
65			case 'r':
66			reverse = !reverse;
67			break;
68			case '2':
69			head.dataBits = 16;
70			break;
71			case '3':
72			head.dataBits = 24;
73			break;
74	greg	1.13	case 'e':
75			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
76			goto userr;
77			bradj = atoi(argv[++i]);
78			break;
79	greg	1.1	default:
80			goto userr;
81			}
82			else
83			break;
84
85			if (i < argc-2)
86			goto userr;
87			/* open input file */
88			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
89			sprintf(msg, "can't open input \"%s\"", argv[i]);
90			quiterr(msg);
91			}
92			/* open output file */
93			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
94			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
95			quiterr(msg);
96			}
97	greg	1.9	/* set gamma */
98			setcolrgam(gamma);
99	greg	1.1	/* convert */
100			if (reverse) {
101			/* get header */
102			if (getthead(&head, NULL, stdin) < 0)
103			quiterr("bad targa file");
104			if (!goodpic(&head))
105			quiterr("incompatible format");
106			/* put header */
107	greg	1.7	printargs(i, argv, stdout);
108	greg	1.11	fputformat(COLRFMT, stdout);
109	greg	1.1	putchar('\n');
110	greg	1.15	fprtresolu(head.x, head.y, stdout);
111	greg	1.1	/* convert file */
112			tg2ra(&head);
113			} else {
114	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
115	greg	1.15	fgetresolu(&head.x, &head.y, stdin) < 0)
116	greg	1.1	quiterr("bad picture file");
117			/* assign header */
118			head.textSize = 0;
119			head.mapType = CM_NOMAP;
120			head.dataType = IM_RGB;
121			head.XOffset = 0;
122			head.YOffset = 0;
123			head.imType = 0;
124			/* write header */
125			putthead(&head, NULL, stdout);
126			/* convert file */
127			ra2tg(&head);
128			}
129			exit(0);
130			userr:
131	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
132	greg	1.1	progname);
133			exit(1);
134			}
135
136
137			int
138			getint2(fp) /* get a 2-byte positive integer */
139			register FILE *fp;
140			{
141			register int b1, b2;
142
143			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
144			quiterr("read error");
145
146			return(b1 \| b2<<8);
147			}
148
149
150			putint2(i, fp) /* put a 2-byte positive integer */
151			register int i;
152			register FILE *fp;
153			{
154			putc(i&0xff, fp);
155			putc(i>>8&0xff, fp);
156			}
157
158
159			quiterr(err) /* print message and exit */
160			char *err;
161			{
162			fprintf(stderr, "%s: %s\n", progname, err);
163			exit(1);
164			}
165
166
167			eputs(s)
168			char *s;
169			{
170			fputs(s, stderr);
171			}
172
173
174			quit(code)
175			int code;
176			{
177			exit(code);
178			}
179
180
181			getthead(hp, ip, fp) /* read header from input */
182			struct hdStruct *hp;
183			char *ip;
184			register FILE *fp;
185			{
186			int nidbytes;
187
188			if ((nidbytes = getc(fp)) == EOF)
189			return(-1);
190			hp->mapType = getc(fp);
191			hp->dataType = getc(fp);
192			hp->mapOrig = getint2(fp);
193			hp->mapLength = getint2(fp);
194			hp->CMapBits = getc(fp);
195			hp->XOffset = getint2(fp);
196			hp->YOffset = getint2(fp);
197			hp->x = getint2(fp);
198			hp->y = getint2(fp);
199			hp->dataBits = getc(fp);
200			hp->imType = getc(fp);
201
202			if (ip != NULL)
203			if (nidbytes)
204	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
205	greg	1.1	else
206			*ip = '\0';
207			else if (nidbytes)
208			fseek(fp, (long)nidbytes, 1);
209
210			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
211			}
212
213
214			putthead(hp, ip, fp) /* write header to output */
215			struct hdStruct *hp;
216			char *ip;
217			register FILE *fp;
218			{
219			if (ip != NULL)
220			putc(strlen(ip), fp);
221			else
222			putc(0, fp);
223			putc(hp->mapType, fp);
224			putc(hp->dataType, fp);
225			putint2(hp->mapOrig, fp);
226			putint2(hp->mapLength, fp);
227			putc(hp->CMapBits, fp);
228			putint2(hp->XOffset, fp);
229			putint2(hp->YOffset, fp);
230			putint2(hp->x, fp);
231			putint2(hp->y, fp);
232			putc(hp->dataBits, fp);
233			putc(hp->imType, fp);
234
235			if (ip != NULL)
236			fputs(ip, fp);
237
238			return(ferror(fp) ? -1 : 0);
239			}
240
241
242			tg2ra(hp) /* targa file to RADIANCE file */
243			struct hdStruct *hp;
244			{
245	greg	1.9	COLR *scanline;
246	greg	1.1	unsigned char *tarData;
247			register int i, j;
248			/* skip color table */
249			if (hp->mapType == CM_HASMAP)
250			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
251			/* allocate targa data */
252			tarData = taralloc(hp);
253			/* get data */
254			readtarga(hp, tarData, stdin);
255			/* allocate input scanline */
256	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
257	greg	1.1	/* convert file */
258			for (i = hp->y-1; i >= 0; i--) {
259			if (hp->dataBits == 16) {
260			register unsigned short *dp;
261			dp = (unsigned short )tarData + ihp->x;
262			for (j = 0; j < hp->x; j++) {
263	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
264			scanline[j][GRN] = *dp>>2 & 0xf8;
265			scanline[j][BLU] = *dp<<3 & 0xf8;
266	greg	1.1	dp++;
267			}
268			} else { /* hp->dataBits == 24 */
269			register unsigned char *dp;
270			dp = (unsigned char )tarData + i3*hp->x;
271			for (j = 0; j < hp->x; j++) {
272	greg	1.9	scanline[j][RED] = dp[2];
273			scanline[j][GRN] = dp[1];
274			scanline[j][BLU] = dp[0];
275	greg	1.1	dp += 3;
276			}
277			}
278	greg	1.9	gambs_colrs(scanline, hp->x);
279	greg	1.13	if (bradj)
280			shiftcolrs(scanline, hp->x, bradj);
281	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
282	greg	1.1	quiterr("error writing RADIANCE file");
283			}
284			free((char *)scanline);
285			free((char *)tarData);
286			}
287
288
289			ra2tg(hp) /* convert radiance to targa file */
290			struct hdStruct *hp;
291			{
292	greg	1.3	register int i, j;
293	greg	1.1	unsigned char *tarData;
294	greg	1.9	COLR *inl;
295	greg	1.1	/* allocate space for data */
296	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
297	greg	1.1	tarData = taralloc(hp);
298			/* convert file */
299			for (j = hp->y-1; j >= 0; j--) {
300	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
301	greg	1.1	quiterr("error reading RADIANCE file");
302	greg	1.13	if (bradj)
303			shiftcolrs(inl, hp->x, bradj);
304	greg	1.9	colrs_gambs(inl, hp->x);
305	greg	1.1	if (hp->dataBits == 16) {
306			register unsigned short *dp;
307	greg	1.12	register int v;
308	greg	1.1	dp = (unsigned short )tarData + jhp->x;
309			for (i = 0; i < hp->x; i++) {
310	greg	1.12	v = inl[i][RED] + (random()&7);
311			if (v > 255) v = 255;
312			*dp = (v&0xf8)<<7;
313			v = inl[i][GRN] + (random()&7);
314			if (v > 255) v = 255;
315			*dp \|= (v&0xf8)<<2;
316			v = inl[i][BLU] + (random()&7);
317			if (v > 255) v = 255;
318			*dp++ \|= v>>3;
319	greg	1.1	}
320			} else { /* hp->dataBits == 24 */
321			register unsigned char *dp;
322			dp = (unsigned char )tarData + j3*hp->x;
323			for (i = 0; i < hp->x; i++) {
324	greg	1.10	*dp++ = inl[i][BLU];
325			*dp++ = inl[i][GRN];
326	greg	1.9	*dp++ = inl[i][RED];
327	greg	1.1	}
328			}
329			}
330			/* write out targa data */
331			writetarga(hp, tarData, stdout);
332
333	greg	1.8	free((char *)inl);
334	greg	1.1	free((char *)tarData);
335			}
336
337
338			writet24(h, d, fp) /* write out 24-bit targa data */
339			struct hdStruct *h;
340			unsigned char *d;
341			FILE *fp;
342			{
343			if (h->dataType == IM_RGB) { /* uncompressed */
344	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
345	greg	1.1	quiterr("error writing targa file");
346			return;
347			}
348			quiterr("unsupported output type");
349			}
350
351
352			writet16(h, d, fp) /* write out 16-bit targa data */
353			struct hdStruct *h;
354			register unsigned short *d;
355			FILE *fp;
356			{
357			register int cnt;
358
359			if (h->dataType == IM_RGB) { /* uncompressed */
360			for (cnt = h->x*h->y; cnt-- > 0; )
361			putint2(*d++, fp);
362			if (ferror(fp))
363			quiterr("error writing targa file");
364			return;
365			}
366			quiterr("unsupported output type");
367			}
368
369
370			readt24(h, data, fp) /* read in 24-bit targa data */
371			register struct hdStruct *h;
372			unsigned char *data;
373			FILE *fp;
374			{
375			register int cnt, c;
376			register unsigned char *dp;
377			int r, g, b;
378
379			if (h->dataType == IM_RGB) { /* uncompressed */
380	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
381	greg	1.1	goto readerr;
382			return;
383			}
384			for (dp = data; dp < data+3h->xh->y; ) {
385			if ((c = getc(fp)) == EOF)
386			goto readerr;
387			cnt = (c & 0x7f) + 1;
388			if (c & 0x80) { /* repeated pixel */
389	greg	1.2	b = getc(fp); g = getc(fp);
390			if ((r = getc(fp)) == EOF)
391	greg	1.1	goto readerr;
392			while (cnt--) {
393	greg	1.2	*dp++ = b;
394			*dp++ = g;
395	greg	1.1	*dp++ = r;
396			}
397			} else /* non-repeating pixels */
398			while (cnt--) {
399			dp++ = getc(fp); dp++ = getc(fp);
400	greg	1.2	if ((r = getc(fp)) == EOF)
401	greg	1.1	goto readerr;
402	greg	1.2	*dp++ = r;
403	greg	1.1	}
404			}
405			return;
406			readerr:
407			quiterr("error reading targa file");
408			}
409
410
411			readt16(h, data, fp) /* read in 16-bit targa data */
412			register struct hdStruct *h;
413			unsigned short *data;
414			FILE *fp;
415			{
416			register int cnt, c;
417			register unsigned short *dp;
418
419			if (h->dataType == IM_RGB) { /* uncompressed */
420			dp = data;
421			for (cnt = h->x*h->y; cnt-- > 0; )
422			*dp++ = getint2(fp);
423			return;
424			}
425			for (dp = data; dp < data+h->x*h->y; ) {
426			if ((c = getc(fp)) == EOF)
427			goto readerr;
428			cnt = (c & 0x7f) + 1;
429			if (c & 0x80) { /* repeated pixel */
430			c = getint2(fp);
431			while (cnt--)
432			*dp++ = c;
433			} else /* non-repeating pixels */
434			while (cnt--)
435			*dp++ = getint2(fp);
436			}
437			return;
438			readerr:
439			quiterr("error reading targa file");
440			}