src/px/ra_t16.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_t16.c,v 2.8 2004/03/28 20:33:14 schorsch 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  <stdio.h>
#include  <string.h>
#include  <time.h>
#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  *progname;
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);
        progname = argv[0];

        head.dataBits = 16;
        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'g':
                                gamcor = atof(argv[++i]);
                                break;
                        case 'r':
                                reverse = !reverse;
                                break;
                        case '2':
                                head.dataBits = 16;
                                break;
                        case '3':
                                head.dataBits = 24;
                                break;
                        case 'e':
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = atoi(argv[++i]);
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        if (i < argc-2)
                goto userr;
                                        /* open input file */
        if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
                sprintf(msg, "can't open input \"%s\"", argv[i]);
                quiterr(msg);
        }
                                        /* open output file */
        if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
                sprintf(msg, "can't open output \"%s\"", argv[i+1]);
                quiterr(msg);
        }
                                        /* set gamma */
        setcolrgam(gamcor);
                                        /* convert */
        if (reverse) {
                                        /* get header */
                if (getthead(&head, NULL, stdin) < 0)
                        quiterr("bad targa file");
                if (!goodpic(&head))
                        quiterr("incompatible format");
                                        /* put header */
                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:	2.9
Committed:	Tue Mar 20 18:45:04 2018 UTC (6 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R2
Changes since 2.8:	+2 -1 lines
Log Message:	Added missing rtio.h include to redefine getc, putc, etc.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.9	static const char RCSid[] = "$Id: ra_t16.c,v 2.8 2004/03/28 20:33:14 schorsch 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			#include <stdio.h>
12	schorsch	2.8	#include <string.h>
13	greg	2.6	#include <time.h>
14	greg	2.3	#include <math.h>
15
16	schorsch	2.7	#include "platform.h"
17	greg	2.9	#include "rtio.h"
18	schorsch	2.8	#include "rtmisc.h"
19	greg	1.1	#include "color.h"
20	greg	1.15	#include "resolu.h"
21	greg	1.5	#include "random.h"
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	schorsch	2.8	#define readtarga(h,d,f) ((h)->dataBits==16 ? \
30			readt16(h,(unsigned short*)d,f) : readt24(h,d,f))
31	greg	1.1
32	schorsch	2.8	#define writetarga(h,d,f) ((h)->dataBits==16 ? \
33			writet16(h,(unsigned short*)d,f) : writet24(h,d,f))
34	greg	1.1
35	greg	2.4	double gamcor = 2.2; /* gamma correction */
36	greg	1.13	int bradj = 0; /* brightness adjustment */
37	greg	1.1	char *progname;
38	schorsch	2.8	char msg[128];
39	greg	1.1
40	schorsch	2.8	static int getint2(FILE *fp);
41			static void putint2(int i, FILE *fp);
42			static void quiterr(char *err);
43			static int getthead(struct hdStruct hp, char ip, FILE *fp);
44			static int putthead(struct hdStruct hp, char ip, FILE *fp);
45			static void tg2ra(struct hdStruct *hp);
46			static void ra2tg(struct hdStruct *hp);
47			static void writet24(struct hdStruct h, unsigned char d, FILE *fp);
48			static void writet16(struct hdStruct h, unsigned short d, FILE *fp);
49			static void readt24(struct hdStruct h, unsigned char data, FILE *fp);
50			static void readt16(struct hdStruct h, unsigned short data, FILE *fp);
51	greg	1.1
52
53	schorsch	2.8	int
54			main(int argc, char *argv[])
55	greg	1.1	{
56			struct hdStruct head;
57			int reverse = 0;
58			int i;
59	schorsch	2.7	SET_DEFAULT_BINARY();
60			SET_FILE_BINARY(stdin);
61			SET_FILE_BINARY(stdout);
62	greg	1.1	progname = argv[0];
63
64			head.dataBits = 16;
65			for (i = 1; i < argc; i++)
66			if (argv[i][0] == '-')
67			switch (argv[i][1]) {
68			case 'g':
69	greg	2.4	gamcor = atof(argv[++i]);
70	greg	1.1	break;
71			case 'r':
72			reverse = !reverse;
73			break;
74			case '2':
75			head.dataBits = 16;
76			break;
77			case '3':
78			head.dataBits = 24;
79			break;
80	greg	1.13	case 'e':
81			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
82			goto userr;
83			bradj = atoi(argv[++i]);
84			break;
85	greg	1.1	default:
86			goto userr;
87			}
88			else
89			break;
90
91			if (i < argc-2)
92			goto userr;
93			/* open input file */
94			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
95			sprintf(msg, "can't open input \"%s\"", argv[i]);
96			quiterr(msg);
97			}
98			/* open output file */
99			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
100			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
101			quiterr(msg);
102			}
103	greg	1.9	/* set gamma */
104	greg	2.4	setcolrgam(gamcor);
105	greg	1.1	/* convert */
106			if (reverse) {
107			/* get header */
108			if (getthead(&head, NULL, stdin) < 0)
109			quiterr("bad targa file");
110			if (!goodpic(&head))
111			quiterr("incompatible format");
112			/* put header */
113	greg	2.5	newheader("RADIANCE", stdout);
114	greg	1.7	printargs(i, argv, stdout);
115	greg	1.11	fputformat(COLRFMT, stdout);
116	greg	1.1	putchar('\n');
117	greg	1.15	fprtresolu(head.x, head.y, stdout);
118	greg	1.1	/* convert file */
119			tg2ra(&head);
120			} else {
121	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
122	greg	1.15	fgetresolu(&head.x, &head.y, stdin) < 0)
123	greg	1.1	quiterr("bad picture file");
124			/* assign header */
125			head.textSize = 0;
126			head.mapType = CM_NOMAP;
127			head.dataType = IM_RGB;
128			head.XOffset = 0;
129			head.YOffset = 0;
130			head.imType = 0;
131			/* write header */
132			putthead(&head, NULL, stdout);
133			/* convert file */
134			ra2tg(&head);
135			}
136			exit(0);
137			userr:
138	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
139	greg	1.1	progname);
140			exit(1);
141			}
142
143
144	schorsch	2.8	static int
145			getint2( /* get a 2-byte positive integer */
146			register FILE *fp
147			)
148	greg	1.1	{
149			register int b1, b2;
150
151			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
152			quiterr("read error");
153
154			return(b1 \| b2<<8);
155			}
156
157
158	schorsch	2.8	static void
159			putint2( /* put a 2-byte positive integer */
160			register int i,
161			register FILE *fp
162			)
163	greg	1.1	{
164			putc(i&0xff, fp);
165			putc(i>>8&0xff, fp);
166			}
167
168
169	schorsch	2.8	static void
170			quiterr( /* print message and exit */
171			char *err
172			)
173	greg	1.1	{
174			fprintf(stderr, "%s: %s\n", progname, err);
175			exit(1);
176			}
177
178
179	greg	2.6	void
180	schorsch	2.8	eputs(
181			char *s
182			)
183	greg	1.1	{
184			fputs(s, stderr);
185			}
186
187
188	greg	2.6	void
189	schorsch	2.8	quit(
190			int code
191			)
192	greg	1.1	{
193			exit(code);
194			}
195
196
197	schorsch	2.8	static int
198			getthead( /* read header from input */
199			struct hdStruct *hp,
200			char *ip,
201			register FILE *fp
202			)
203	greg	1.1	{
204			int nidbytes;
205
206			if ((nidbytes = getc(fp)) == EOF)
207			return(-1);
208			hp->mapType = getc(fp);
209			hp->dataType = getc(fp);
210			hp->mapOrig = getint2(fp);
211			hp->mapLength = getint2(fp);
212			hp->CMapBits = getc(fp);
213			hp->XOffset = getint2(fp);
214			hp->YOffset = getint2(fp);
215			hp->x = getint2(fp);
216			hp->y = getint2(fp);
217			hp->dataBits = getc(fp);
218			hp->imType = getc(fp);
219
220			if (ip != NULL)
221			if (nidbytes)
222	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
223	greg	1.1	else
224			*ip = '\0';
225			else if (nidbytes)
226			fseek(fp, (long)nidbytes, 1);
227
228			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
229			}
230
231
232	schorsch	2.8	static int
233			putthead( /* write header to output */
234			struct hdStruct *hp,
235			char *ip,
236			register FILE *fp
237			)
238	greg	1.1	{
239			if (ip != NULL)
240			putc(strlen(ip), fp);
241			else
242			putc(0, fp);
243			putc(hp->mapType, fp);
244			putc(hp->dataType, fp);
245			putint2(hp->mapOrig, fp);
246			putint2(hp->mapLength, fp);
247			putc(hp->CMapBits, fp);
248			putint2(hp->XOffset, fp);
249			putint2(hp->YOffset, fp);
250			putint2(hp->x, fp);
251			putint2(hp->y, fp);
252			putc(hp->dataBits, fp);
253			putc(hp->imType, fp);
254
255			if (ip != NULL)
256			fputs(ip, fp);
257
258			return(ferror(fp) ? -1 : 0);
259			}
260
261
262	schorsch	2.8	static void
263			tg2ra( /* targa file to RADIANCE file */
264			struct hdStruct *hp
265			)
266	greg	1.1	{
267	greg	1.9	COLR *scanline;
268	greg	1.1	unsigned char *tarData;
269			register int i, j;
270			/* skip color table */
271			if (hp->mapType == CM_HASMAP)
272			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
273			/* allocate targa data */
274			tarData = taralloc(hp);
275			/* get data */
276			readtarga(hp, tarData, stdin);
277			/* allocate input scanline */
278	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
279	greg	1.1	/* convert file */
280			for (i = hp->y-1; i >= 0; i--) {
281			if (hp->dataBits == 16) {
282			register unsigned short *dp;
283			dp = (unsigned short )tarData + ihp->x;
284			for (j = 0; j < hp->x; j++) {
285	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
286			scanline[j][GRN] = *dp>>2 & 0xf8;
287			scanline[j][BLU] = *dp<<3 & 0xf8;
288	greg	1.1	dp++;
289			}
290			} else { /* hp->dataBits == 24 */
291			register unsigned char *dp;
292			dp = (unsigned char )tarData + i3*hp->x;
293			for (j = 0; j < hp->x; j++) {
294	greg	1.9	scanline[j][RED] = dp[2];
295			scanline[j][GRN] = dp[1];
296			scanline[j][BLU] = dp[0];
297	greg	1.1	dp += 3;
298			}
299			}
300	greg	1.9	gambs_colrs(scanline, hp->x);
301	greg	1.13	if (bradj)
302			shiftcolrs(scanline, hp->x, bradj);
303	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
304	greg	1.1	quiterr("error writing RADIANCE file");
305			}
306	greg	2.6	free((void *)scanline);
307			free((void *)tarData);
308	greg	1.1	}
309
310
311	schorsch	2.8	static void
312			ra2tg( /* convert radiance to targa file */
313			struct hdStruct *hp
314			)
315	greg	1.1	{
316	greg	1.3	register int i, j;
317	greg	1.1	unsigned char *tarData;
318	greg	1.9	COLR *inl;
319	greg	1.1	/* allocate space for data */
320	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
321	greg	1.1	tarData = taralloc(hp);
322			/* convert file */
323			for (j = hp->y-1; j >= 0; j--) {
324	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
325	greg	1.1	quiterr("error reading RADIANCE file");
326	greg	1.13	if (bradj)
327			shiftcolrs(inl, hp->x, bradj);
328	greg	1.9	colrs_gambs(inl, hp->x);
329	greg	1.1	if (hp->dataBits == 16) {
330			register unsigned short *dp;
331	greg	1.12	register int v;
332	greg	1.1	dp = (unsigned short )tarData + jhp->x;
333			for (i = 0; i < hp->x; i++) {
334	greg	1.12	v = inl[i][RED] + (random()&7);
335			if (v > 255) v = 255;
336			*dp = (v&0xf8)<<7;
337			v = inl[i][GRN] + (random()&7);
338			if (v > 255) v = 255;
339			*dp \|= (v&0xf8)<<2;
340			v = inl[i][BLU] + (random()&7);
341			if (v > 255) v = 255;
342			*dp++ \|= v>>3;
343	greg	1.1	}
344			} else { /* hp->dataBits == 24 */
345			register unsigned char *dp;
346			dp = (unsigned char )tarData + j3*hp->x;
347			for (i = 0; i < hp->x; i++) {
348	greg	1.10	*dp++ = inl[i][BLU];
349			*dp++ = inl[i][GRN];
350	greg	1.9	*dp++ = inl[i][RED];
351	greg	1.1	}
352			}
353			}
354			/* write out targa data */
355			writetarga(hp, tarData, stdout);
356
357	greg	2.6	free((void *)inl);
358			free((void *)tarData);
359	greg	1.1	}
360
361
362	schorsch	2.8	static void
363			writet24( /* write out 24-bit targa data */
364			struct hdStruct *h,
365			unsigned char *d,
366			FILE *fp
367			)
368	greg	1.1	{
369			if (h->dataType == IM_RGB) { /* uncompressed */
370	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
371	greg	1.1	quiterr("error writing targa file");
372			return;
373			}
374			quiterr("unsupported output type");
375			}
376
377
378	schorsch	2.8	static void
379			writet16( /* write out 16-bit targa data */
380			struct hdStruct *h,
381			register unsigned short *d,
382			FILE *fp
383			)
384	greg	1.1	{
385			register int cnt;
386
387			if (h->dataType == IM_RGB) { /* uncompressed */
388			for (cnt = h->x*h->y; cnt-- > 0; )
389			putint2(*d++, fp);
390			if (ferror(fp))
391			quiterr("error writing targa file");
392			return;
393			}
394			quiterr("unsupported output type");
395			}
396
397
398	schorsch	2.8	static void
399			readt24( /* read in 24-bit targa data */
400			register struct hdStruct *h,
401			unsigned char *data,
402			FILE *fp
403			)
404	greg	1.1	{
405			register int cnt, c;
406			register unsigned char *dp;
407			int r, g, b;
408
409			if (h->dataType == IM_RGB) { /* uncompressed */
410	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
411	greg	1.1	goto readerr;
412			return;
413			}
414			for (dp = data; dp < data+3h->xh->y; ) {
415			if ((c = getc(fp)) == EOF)
416			goto readerr;
417			cnt = (c & 0x7f) + 1;
418			if (c & 0x80) { /* repeated pixel */
419	greg	1.2	b = getc(fp); g = getc(fp);
420			if ((r = getc(fp)) == EOF)
421	greg	1.1	goto readerr;
422			while (cnt--) {
423	greg	1.2	*dp++ = b;
424			*dp++ = g;
425	greg	1.1	*dp++ = r;
426			}
427			} else /* non-repeating pixels */
428			while (cnt--) {
429			dp++ = getc(fp); dp++ = getc(fp);
430	greg	1.2	if ((r = getc(fp)) == EOF)
431	greg	1.1	goto readerr;
432	greg	1.2	*dp++ = r;
433	greg	1.1	}
434			}
435			return;
436			readerr:
437			quiterr("error reading targa file");
438			}
439
440
441	schorsch	2.8	static void
442			readt16( /* read in 16-bit targa data */
443			register struct hdStruct *h,
444			unsigned short *data,
445			FILE *fp
446			)
447	greg	1.1	{
448			register int cnt, c;
449			register unsigned short *dp;
450
451			if (h->dataType == IM_RGB) { /* uncompressed */
452			dp = data;
453			for (cnt = h->x*h->y; cnt-- > 0; )
454			*dp++ = getint2(fp);
455			return;
456			}
457			for (dp = data; dp < data+h->x*h->y; ) {
458			if ((c = getc(fp)) == EOF)
459			goto readerr;
460			cnt = (c & 0x7f) + 1;
461			if (c & 0x80) { /* repeated pixel */
462			c = getint2(fp);
463			while (cnt--)
464			*dp++ = c;
465			} else /* non-repeating pixels */
466			while (cnt--)
467			*dp++ = getint2(fp);
468			}
469			return;
470			readerr:
471			quiterr("error reading targa file");
472			}