src/px/ra_t16.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_t16.c,v 2.11 2025/06/06 19:11:21 greg Exp $";
#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  <math.h>
#include  "platform.h"
#include  "rtio.h"
#include  "rtmisc.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,(unsigned short*)d,f) : readt24(h,d,f))

#define  writetarga(h,d,f)      ((h)->dataBits==16 ? \
                        writet16(h,(unsigned short*)d,f) : writet24(h,d,f))

double  gamcor = 2.2;                   /* gamma correction */
int  bradj = 0;                         /* brightness adjustment */
char  msg[128];

static int getint2(FILE *fp);
static void putint2(int i, FILE *fp);
static void quiterr(char *err);
static int getthead(struct hdStruct *hp, char *ip, FILE *fp);
static int putthead(struct hdStruct *hp, char *ip, FILE *fp);
static void tg2ra(struct hdStruct *hp);
static void ra2tg(struct hdStruct *hp);
static void writet24(struct hdStruct *h, unsigned char *d, FILE *fp);
static void writet16(struct hdStruct *h, unsigned short *d, FILE *fp);
static void readt24(struct hdStruct *h, unsigned char *data, FILE *fp);
static void readt16(struct hdStruct *h, unsigned short *data, FILE *fp);


int
main(int  argc, char  *argv[])
{
        struct hdStruct  head;
        int  reverse = 0;
        int  i;
        
        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        fixargv0(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 */
                newheader("RADIANCE", stdout);
                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);
}


static int
getint2(                        /* 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);
}


static void
putint2(                        /* put a 2-byte positive integer */
        register int  i,
        register FILE   *fp
)
{
        putc(i&0xff, fp);
        putc(i>>8&0xff, fp);
}


static void
quiterr(                /* print message and exit */
        char  *err
)
{
        fprintf(stderr, "%s: %s\n", progname, err);
        exit(1);
}


void
eputs(
        char *s
)
{
        fputs(s, stderr);
}


void
quit(
        int code
)
{
        exit(code);
}


static int
getthead(               /* 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);
}


static int
putthead(               /* 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);
}


static void
tg2ra(                  /* 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((void *)scanline);
        free((void *)tarData);
}


static void
ra2tg(                  /* 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((void *)inl);
        free((void *)tarData);
}


static void
writet24(               /* 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");
}


static void
writet16(               /* 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");
}


static void
readt24(                /* 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");
}


static void
readt16(                /* 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:	2.12
Committed:	Sat Jun 7 05:09:46 2025 UTC (2 weeks, 5 days ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.11:	+1 -2 lines
Log Message:	refactor: Put some declarations into "paths.h" and included in "platform.h"
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.12	static const char RCSid[] = "$Id: ra_t16.c,v 2.11 2025/06/06 19:11:21 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* ra_t16.c - program to convert between RADIANCE and
6			* Targa 16, 24 and 32-bit images.
7			*
8			* 11/2/88 Adapted from ra_t8.c
9			*/
10
11	greg	2.3	#include <math.h>
12	schorsch	2.7	#include "platform.h"
13	greg	2.9	#include "rtio.h"
14	schorsch	2.8	#include "rtmisc.h"
15	greg	1.1	#include "color.h"
16	greg	1.15	#include "resolu.h"
17	greg	1.5	#include "random.h"
18	greg	1.1	#include "targa.h"
19
20			#define goodpic(h) (((h)->dataType==IM_RGB \|\| (h)->dataType==IM_CRGB) \
21			&& ((h)->dataBits==16 \|\| (h)->dataBits==24))
22
23			#define taralloc(h) (unsigned char )emalloc((h)->x(h)->y*(h)->dataBits/8)
24
25	schorsch	2.8	#define readtarga(h,d,f) ((h)->dataBits==16 ? \
26			readt16(h,(unsigned short*)d,f) : readt24(h,d,f))
27	greg	1.1
28	schorsch	2.8	#define writetarga(h,d,f) ((h)->dataBits==16 ? \
29			writet16(h,(unsigned short*)d,f) : writet24(h,d,f))
30	greg	1.1
31	greg	2.4	double gamcor = 2.2; /* gamma correction */
32	greg	1.13	int bradj = 0; /* brightness adjustment */
33	schorsch	2.8	char msg[128];
34	greg	1.1
35	schorsch	2.8	static int getint2(FILE *fp);
36			static void putint2(int i, FILE *fp);
37			static void quiterr(char *err);
38			static int getthead(struct hdStruct hp, char ip, FILE *fp);
39			static int putthead(struct hdStruct hp, char ip, FILE *fp);
40			static void tg2ra(struct hdStruct *hp);
41			static void ra2tg(struct hdStruct *hp);
42			static void writet24(struct hdStruct h, unsigned char d, FILE *fp);
43			static void writet16(struct hdStruct h, unsigned short d, FILE *fp);
44			static void readt24(struct hdStruct h, unsigned char data, FILE *fp);
45			static void readt16(struct hdStruct h, unsigned short data, FILE *fp);
46	greg	1.1
47
48	schorsch	2.8	int
49			main(int argc, char *argv[])
50	greg	1.1	{
51			struct hdStruct head;
52			int reverse = 0;
53			int i;
54	greg	2.11
55	schorsch	2.7	SET_DEFAULT_BINARY();
56			SET_FILE_BINARY(stdin);
57			SET_FILE_BINARY(stdout);
58	greg	2.11	fixargv0(argv[0]);
59	greg	1.1
60			head.dataBits = 16;
61			for (i = 1; i < argc; i++)
62			if (argv[i][0] == '-')
63			switch (argv[i][1]) {
64			case 'g':
65	greg	2.4	gamcor = atof(argv[++i]);
66	greg	1.1	break;
67			case 'r':
68			reverse = !reverse;
69			break;
70			case '2':
71			head.dataBits = 16;
72			break;
73			case '3':
74			head.dataBits = 24;
75			break;
76	greg	1.13	case 'e':
77			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
78			goto userr;
79			bradj = atoi(argv[++i]);
80			break;
81	greg	1.1	default:
82			goto userr;
83			}
84			else
85			break;
86
87			if (i < argc-2)
88			goto userr;
89			/* open input file */
90			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
91			sprintf(msg, "can't open input \"%s\"", argv[i]);
92			quiterr(msg);
93			}
94			/* open output file */
95			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
96			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
97			quiterr(msg);
98			}
99	greg	1.9	/* set gamma */
100	greg	2.4	setcolrgam(gamcor);
101	greg	1.1	/* convert */
102			if (reverse) {
103			/* get header */
104			if (getthead(&head, NULL, stdin) < 0)
105			quiterr("bad targa file");
106			if (!goodpic(&head))
107			quiterr("incompatible format");
108			/* put header */
109	greg	2.5	newheader("RADIANCE", stdout);
110	greg	1.7	printargs(i, argv, stdout);
111	greg	1.11	fputformat(COLRFMT, stdout);
112	greg	1.1	putchar('\n');
113	greg	1.15	fprtresolu(head.x, head.y, stdout);
114	greg	1.1	/* convert file */
115			tg2ra(&head);
116			} else {
117	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
118	greg	1.15	fgetresolu(&head.x, &head.y, stdin) < 0)
119	greg	1.1	quiterr("bad picture file");
120			/* assign header */
121			head.textSize = 0;
122			head.mapType = CM_NOMAP;
123			head.dataType = IM_RGB;
124			head.XOffset = 0;
125			head.YOffset = 0;
126			head.imType = 0;
127			/* write header */
128			putthead(&head, NULL, stdout);
129			/* convert file */
130			ra2tg(&head);
131			}
132			exit(0);
133			userr:
134	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
135	greg	1.1	progname);
136			exit(1);
137			}
138
139
140	schorsch	2.8	static int
141			getint2( /* get a 2-byte positive integer */
142			register FILE *fp
143			)
144	greg	1.1	{
145			register int b1, b2;
146
147			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
148			quiterr("read error");
149
150			return(b1 \| b2<<8);
151			}
152
153
154	schorsch	2.8	static void
155			putint2( /* put a 2-byte positive integer */
156			register int i,
157			register FILE *fp
158			)
159	greg	1.1	{
160			putc(i&0xff, fp);
161			putc(i>>8&0xff, fp);
162			}
163
164
165	schorsch	2.8	static void
166			quiterr( /* print message and exit */
167			char *err
168			)
169	greg	1.1	{
170			fprintf(stderr, "%s: %s\n", progname, err);
171			exit(1);
172			}
173
174
175	greg	2.6	void
176	schorsch	2.8	eputs(
177			char *s
178			)
179	greg	1.1	{
180			fputs(s, stderr);
181			}
182
183
184	greg	2.6	void
185	schorsch	2.8	quit(
186			int code
187			)
188	greg	1.1	{
189			exit(code);
190			}
191
192
193	schorsch	2.8	static int
194			getthead( /* read header from input */
195			struct hdStruct *hp,
196			char *ip,
197			register FILE *fp
198			)
199	greg	1.1	{
200			int nidbytes;
201
202			if ((nidbytes = getc(fp)) == EOF)
203			return(-1);
204			hp->mapType = getc(fp);
205			hp->dataType = getc(fp);
206			hp->mapOrig = getint2(fp);
207			hp->mapLength = getint2(fp);
208			hp->CMapBits = getc(fp);
209			hp->XOffset = getint2(fp);
210			hp->YOffset = getint2(fp);
211			hp->x = getint2(fp);
212			hp->y = getint2(fp);
213			hp->dataBits = getc(fp);
214			hp->imType = getc(fp);
215
216			if (ip != NULL)
217			if (nidbytes)
218	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
219	greg	1.1	else
220			*ip = '\0';
221			else if (nidbytes)
222			fseek(fp, (long)nidbytes, 1);
223
224			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
225			}
226
227
228	schorsch	2.8	static int
229			putthead( /* write header to output */
230			struct hdStruct *hp,
231			char *ip,
232			register FILE *fp
233			)
234	greg	1.1	{
235			if (ip != NULL)
236			putc(strlen(ip), fp);
237			else
238			putc(0, fp);
239			putc(hp->mapType, fp);
240			putc(hp->dataType, fp);
241			putint2(hp->mapOrig, fp);
242			putint2(hp->mapLength, fp);
243			putc(hp->CMapBits, fp);
244			putint2(hp->XOffset, fp);
245			putint2(hp->YOffset, fp);
246			putint2(hp->x, fp);
247			putint2(hp->y, fp);
248			putc(hp->dataBits, fp);
249			putc(hp->imType, fp);
250
251			if (ip != NULL)
252			fputs(ip, fp);
253
254			return(ferror(fp) ? -1 : 0);
255			}
256
257
258	schorsch	2.8	static void
259			tg2ra( /* targa file to RADIANCE file */
260			struct hdStruct *hp
261			)
262	greg	1.1	{
263	greg	1.9	COLR *scanline;
264	greg	1.1	unsigned char *tarData;
265			register int i, j;
266			/* skip color table */
267			if (hp->mapType == CM_HASMAP)
268			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
269			/* allocate targa data */
270			tarData = taralloc(hp);
271			/* get data */
272			readtarga(hp, tarData, stdin);
273			/* allocate input scanline */
274	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
275	greg	1.1	/* convert file */
276			for (i = hp->y-1; i >= 0; i--) {
277			if (hp->dataBits == 16) {
278			register unsigned short *dp;
279			dp = (unsigned short )tarData + ihp->x;
280			for (j = 0; j < hp->x; j++) {
281	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
282			scanline[j][GRN] = *dp>>2 & 0xf8;
283			scanline[j][BLU] = *dp<<3 & 0xf8;
284	greg	1.1	dp++;
285			}
286			} else { /* hp->dataBits == 24 */
287			register unsigned char *dp;
288			dp = (unsigned char )tarData + i3*hp->x;
289			for (j = 0; j < hp->x; j++) {
290	greg	1.9	scanline[j][RED] = dp[2];
291			scanline[j][GRN] = dp[1];
292			scanline[j][BLU] = dp[0];
293	greg	1.1	dp += 3;
294			}
295			}
296	greg	1.9	gambs_colrs(scanline, hp->x);
297	greg	1.13	if (bradj)
298			shiftcolrs(scanline, hp->x, bradj);
299	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
300	greg	1.1	quiterr("error writing RADIANCE file");
301			}
302	greg	2.6	free((void *)scanline);
303			free((void *)tarData);
304	greg	1.1	}
305
306
307	schorsch	2.8	static void
308			ra2tg( /* convert radiance to targa file */
309			struct hdStruct *hp
310			)
311	greg	1.1	{
312	greg	1.3	register int i, j;
313	greg	1.1	unsigned char *tarData;
314	greg	1.9	COLR *inl;
315	greg	1.1	/* allocate space for data */
316	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
317	greg	1.1	tarData = taralloc(hp);
318			/* convert file */
319			for (j = hp->y-1; j >= 0; j--) {
320	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
321	greg	1.1	quiterr("error reading RADIANCE file");
322	greg	1.13	if (bradj)
323			shiftcolrs(inl, hp->x, bradj);
324	greg	1.9	colrs_gambs(inl, hp->x);
325	greg	1.1	if (hp->dataBits == 16) {
326			register unsigned short *dp;
327	greg	1.12	register int v;
328	greg	1.1	dp = (unsigned short )tarData + jhp->x;
329			for (i = 0; i < hp->x; i++) {
330	greg	1.12	v = inl[i][RED] + (random()&7);
331			if (v > 255) v = 255;
332			*dp = (v&0xf8)<<7;
333			v = inl[i][GRN] + (random()&7);
334			if (v > 255) v = 255;
335			*dp \|= (v&0xf8)<<2;
336			v = inl[i][BLU] + (random()&7);
337			if (v > 255) v = 255;
338			*dp++ \|= v>>3;
339	greg	1.1	}
340			} else { /* hp->dataBits == 24 */
341			register unsigned char *dp;
342			dp = (unsigned char )tarData + j3*hp->x;
343			for (i = 0; i < hp->x; i++) {
344	greg	1.10	*dp++ = inl[i][BLU];
345			*dp++ = inl[i][GRN];
346	greg	1.9	*dp++ = inl[i][RED];
347	greg	1.1	}
348			}
349			}
350			/* write out targa data */
351			writetarga(hp, tarData, stdout);
352
353	greg	2.6	free((void *)inl);
354			free((void *)tarData);
355	greg	1.1	}
356
357
358	schorsch	2.8	static void
359			writet24( /* write out 24-bit targa data */
360			struct hdStruct *h,
361			unsigned char *d,
362			FILE *fp
363			)
364	greg	1.1	{
365			if (h->dataType == IM_RGB) { /* uncompressed */
366	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
367	greg	1.1	quiterr("error writing targa file");
368			return;
369			}
370			quiterr("unsupported output type");
371			}
372
373
374	schorsch	2.8	static void
375			writet16( /* write out 16-bit targa data */
376			struct hdStruct *h,
377			register unsigned short *d,
378			FILE *fp
379			)
380	greg	1.1	{
381			register int cnt;
382
383			if (h->dataType == IM_RGB) { /* uncompressed */
384			for (cnt = h->x*h->y; cnt-- > 0; )
385			putint2(*d++, fp);
386			if (ferror(fp))
387			quiterr("error writing targa file");
388			return;
389			}
390			quiterr("unsupported output type");
391			}
392
393
394	schorsch	2.8	static void
395			readt24( /* read in 24-bit targa data */
396			register struct hdStruct *h,
397			unsigned char *data,
398			FILE *fp
399			)
400	greg	1.1	{
401			register int cnt, c;
402			register unsigned char *dp;
403			int r, g, b;
404
405			if (h->dataType == IM_RGB) { /* uncompressed */
406	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
407	greg	1.1	goto readerr;
408			return;
409			}
410			for (dp = data; dp < data+3h->xh->y; ) {
411			if ((c = getc(fp)) == EOF)
412			goto readerr;
413			cnt = (c & 0x7f) + 1;
414			if (c & 0x80) { /* repeated pixel */
415	greg	1.2	b = getc(fp); g = getc(fp);
416			if ((r = getc(fp)) == EOF)
417	greg	1.1	goto readerr;
418			while (cnt--) {
419	greg	1.2	*dp++ = b;
420			*dp++ = g;
421	greg	1.1	*dp++ = r;
422			}
423			} else /* non-repeating pixels */
424			while (cnt--) {
425			dp++ = getc(fp); dp++ = getc(fp);
426	greg	1.2	if ((r = getc(fp)) == EOF)
427	greg	1.1	goto readerr;
428	greg	1.2	*dp++ = r;
429	greg	1.1	}
430			}
431			return;
432			readerr:
433			quiterr("error reading targa file");
434			}
435
436
437	schorsch	2.8	static void
438			readt16( /* read in 16-bit targa data */
439			register struct hdStruct *h,
440			unsigned short *data,
441			FILE *fp
442			)
443	greg	1.1	{
444			register int cnt, c;
445			register unsigned short *dp;
446
447			if (h->dataType == IM_RGB) { /* uncompressed */
448			dp = data;
449			for (cnt = h->x*h->y; cnt-- > 0; )
450			*dp++ = getint2(fp);
451			return;
452			}
453			for (dp = data; dp < data+h->x*h->y; ) {
454			if ((c = getc(fp)) == EOF)
455			goto readerr;
456			cnt = (c & 0x7f) + 1;
457			if (c & 0x80) { /* repeated pixel */
458			c = getint2(fp);
459			while (cnt--)
460			*dp++ = c;
461			} else /* non-repeating pixels */
462			while (cnt--)
463			*dp++ = getint2(fp);
464			}
465			return;
466			readerr:
467			quiterr("error reading targa file");
468			}