src/px/ra_t16.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_t16.c,v 2.7 2003/06/05 19:29:34 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  "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:	2.8
Committed:	Sun Mar 28 20:33:14 2004 UTC (21 years, 7 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R0, rad5R1, rad4R2, rad3R7P2, rad3R7P1, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1, rad4R2P2
Changes since 2.7:	+84 -53 lines
Log Message:	Continued ANSIfication, and other fixes and clarifications.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.8	static const char RCSid[] = "$Id: ra_t16.c,v 2.7 2003/06/05 19:29:34 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	schorsch	2.8	#include "rtmisc.h"
18	greg	1.1	#include "color.h"
19	greg	1.15	#include "resolu.h"
20	greg	1.5	#include "random.h"
21	greg	1.1	#include "targa.h"
22
23			#define goodpic(h) (((h)->dataType==IM_RGB \|\| (h)->dataType==IM_CRGB) \
24			&& ((h)->dataBits==16 \|\| (h)->dataBits==24))
25
26			#define taralloc(h) (unsigned char )emalloc((h)->x(h)->y*(h)->dataBits/8)
27
28	schorsch	2.8	#define readtarga(h,d,f) ((h)->dataBits==16 ? \
29			readt16(h,(unsigned short*)d,f) : readt24(h,d,f))
30	greg	1.1
31	schorsch	2.8	#define writetarga(h,d,f) ((h)->dataBits==16 ? \
32			writet16(h,(unsigned short*)d,f) : writet24(h,d,f))
33	greg	1.1
34	greg	2.4	double gamcor = 2.2; /* gamma correction */
35	greg	1.13	int bradj = 0; /* brightness adjustment */
36	greg	1.1	char *progname;
37	schorsch	2.8	char msg[128];
38	greg	1.1
39	schorsch	2.8	static int getint2(FILE *fp);
40			static void putint2(int i, FILE *fp);
41			static void quiterr(char *err);
42			static int getthead(struct hdStruct hp, char ip, FILE *fp);
43			static int putthead(struct hdStruct hp, char ip, FILE *fp);
44			static void tg2ra(struct hdStruct *hp);
45			static void ra2tg(struct hdStruct *hp);
46			static void writet24(struct hdStruct h, unsigned char d, FILE *fp);
47			static void writet16(struct hdStruct h, unsigned short d, FILE *fp);
48			static void readt24(struct hdStruct h, unsigned char data, FILE *fp);
49			static void readt16(struct hdStruct h, unsigned short data, FILE *fp);
50	greg	1.1
51
52	schorsch	2.8	int
53			main(int argc, char *argv[])
54	greg	1.1	{
55			struct hdStruct head;
56			int reverse = 0;
57			int i;
58	schorsch	2.7	SET_DEFAULT_BINARY();
59			SET_FILE_BINARY(stdin);
60			SET_FILE_BINARY(stdout);
61	greg	1.1	progname = argv[0];
62
63			head.dataBits = 16;
64			for (i = 1; i < argc; i++)
65			if (argv[i][0] == '-')
66			switch (argv[i][1]) {
67			case 'g':
68	greg	2.4	gamcor = atof(argv[++i]);
69	greg	1.1	break;
70			case 'r':
71			reverse = !reverse;
72			break;
73			case '2':
74			head.dataBits = 16;
75			break;
76			case '3':
77			head.dataBits = 24;
78			break;
79	greg	1.13	case 'e':
80			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
81			goto userr;
82			bradj = atoi(argv[++i]);
83			break;
84	greg	1.1	default:
85			goto userr;
86			}
87			else
88			break;
89
90			if (i < argc-2)
91			goto userr;
92			/* open input file */
93			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
94			sprintf(msg, "can't open input \"%s\"", argv[i]);
95			quiterr(msg);
96			}
97			/* open output file */
98			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
99			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
100			quiterr(msg);
101			}
102	greg	1.9	/* set gamma */
103	greg	2.4	setcolrgam(gamcor);
104	greg	1.1	/* convert */
105			if (reverse) {
106			/* get header */
107			if (getthead(&head, NULL, stdin) < 0)
108			quiterr("bad targa file");
109			if (!goodpic(&head))
110			quiterr("incompatible format");
111			/* put header */
112	greg	2.5	newheader("RADIANCE", stdout);
113	greg	1.7	printargs(i, argv, stdout);
114	greg	1.11	fputformat(COLRFMT, stdout);
115	greg	1.1	putchar('\n');
116	greg	1.15	fprtresolu(head.x, head.y, stdout);
117	greg	1.1	/* convert file */
118			tg2ra(&head);
119			} else {
120	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
121	greg	1.15	fgetresolu(&head.x, &head.y, stdin) < 0)
122	greg	1.1	quiterr("bad picture file");
123			/* assign header */
124			head.textSize = 0;
125			head.mapType = CM_NOMAP;
126			head.dataType = IM_RGB;
127			head.XOffset = 0;
128			head.YOffset = 0;
129			head.imType = 0;
130			/* write header */
131			putthead(&head, NULL, stdout);
132			/* convert file */
133			ra2tg(&head);
134			}
135			exit(0);
136			userr:
137	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
138	greg	1.1	progname);
139			exit(1);
140			}
141
142
143	schorsch	2.8	static int
144			getint2( /* get a 2-byte positive integer */
145			register FILE *fp
146			)
147	greg	1.1	{
148			register int b1, b2;
149
150			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
151			quiterr("read error");
152
153			return(b1 \| b2<<8);
154			}
155
156
157	schorsch	2.8	static void
158			putint2( /* put a 2-byte positive integer */
159			register int i,
160			register FILE *fp
161			)
162	greg	1.1	{
163			putc(i&0xff, fp);
164			putc(i>>8&0xff, fp);
165			}
166
167
168	schorsch	2.8	static void
169			quiterr( /* print message and exit */
170			char *err
171			)
172	greg	1.1	{
173			fprintf(stderr, "%s: %s\n", progname, err);
174			exit(1);
175			}
176
177
178	greg	2.6	void
179	schorsch	2.8	eputs(
180			char *s
181			)
182	greg	1.1	{
183			fputs(s, stderr);
184			}
185
186
187	greg	2.6	void
188	schorsch	2.8	quit(
189			int code
190			)
191	greg	1.1	{
192			exit(code);
193			}
194
195
196	schorsch	2.8	static int
197			getthead( /* read header from input */
198			struct hdStruct *hp,
199			char *ip,
200			register FILE *fp
201			)
202	greg	1.1	{
203			int nidbytes;
204
205			if ((nidbytes = getc(fp)) == EOF)
206			return(-1);
207			hp->mapType = getc(fp);
208			hp->dataType = getc(fp);
209			hp->mapOrig = getint2(fp);
210			hp->mapLength = getint2(fp);
211			hp->CMapBits = getc(fp);
212			hp->XOffset = getint2(fp);
213			hp->YOffset = getint2(fp);
214			hp->x = getint2(fp);
215			hp->y = getint2(fp);
216			hp->dataBits = getc(fp);
217			hp->imType = getc(fp);
218
219			if (ip != NULL)
220			if (nidbytes)
221	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
222	greg	1.1	else
223			*ip = '\0';
224			else if (nidbytes)
225			fseek(fp, (long)nidbytes, 1);
226
227			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
228			}
229
230
231	schorsch	2.8	static int
232			putthead( /* write header to output */
233			struct hdStruct *hp,
234			char *ip,
235			register FILE *fp
236			)
237	greg	1.1	{
238			if (ip != NULL)
239			putc(strlen(ip), fp);
240			else
241			putc(0, fp);
242			putc(hp->mapType, fp);
243			putc(hp->dataType, fp);
244			putint2(hp->mapOrig, fp);
245			putint2(hp->mapLength, fp);
246			putc(hp->CMapBits, fp);
247			putint2(hp->XOffset, fp);
248			putint2(hp->YOffset, fp);
249			putint2(hp->x, fp);
250			putint2(hp->y, fp);
251			putc(hp->dataBits, fp);
252			putc(hp->imType, fp);
253
254			if (ip != NULL)
255			fputs(ip, fp);
256
257			return(ferror(fp) ? -1 : 0);
258			}
259
260
261	schorsch	2.8	static void
262			tg2ra( /* targa file to RADIANCE file */
263			struct hdStruct *hp
264			)
265	greg	1.1	{
266	greg	1.9	COLR *scanline;
267	greg	1.1	unsigned char *tarData;
268			register int i, j;
269			/* skip color table */
270			if (hp->mapType == CM_HASMAP)
271			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
272			/* allocate targa data */
273			tarData = taralloc(hp);
274			/* get data */
275			readtarga(hp, tarData, stdin);
276			/* allocate input scanline */
277	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
278	greg	1.1	/* convert file */
279			for (i = hp->y-1; i >= 0; i--) {
280			if (hp->dataBits == 16) {
281			register unsigned short *dp;
282			dp = (unsigned short )tarData + ihp->x;
283			for (j = 0; j < hp->x; j++) {
284	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
285			scanline[j][GRN] = *dp>>2 & 0xf8;
286			scanline[j][BLU] = *dp<<3 & 0xf8;
287	greg	1.1	dp++;
288			}
289			} else { /* hp->dataBits == 24 */
290			register unsigned char *dp;
291			dp = (unsigned char )tarData + i3*hp->x;
292			for (j = 0; j < hp->x; j++) {
293	greg	1.9	scanline[j][RED] = dp[2];
294			scanline[j][GRN] = dp[1];
295			scanline[j][BLU] = dp[0];
296	greg	1.1	dp += 3;
297			}
298			}
299	greg	1.9	gambs_colrs(scanline, hp->x);
300	greg	1.13	if (bradj)
301			shiftcolrs(scanline, hp->x, bradj);
302	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
303	greg	1.1	quiterr("error writing RADIANCE file");
304			}
305	greg	2.6	free((void *)scanline);
306			free((void *)tarData);
307	greg	1.1	}
308
309
310	schorsch	2.8	static void
311			ra2tg( /* convert radiance to targa file */
312			struct hdStruct *hp
313			)
314	greg	1.1	{
315	greg	1.3	register int i, j;
316	greg	1.1	unsigned char *tarData;
317	greg	1.9	COLR *inl;
318	greg	1.1	/* allocate space for data */
319	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
320	greg	1.1	tarData = taralloc(hp);
321			/* convert file */
322			for (j = hp->y-1; j >= 0; j--) {
323	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
324	greg	1.1	quiterr("error reading RADIANCE file");
325	greg	1.13	if (bradj)
326			shiftcolrs(inl, hp->x, bradj);
327	greg	1.9	colrs_gambs(inl, hp->x);
328	greg	1.1	if (hp->dataBits == 16) {
329			register unsigned short *dp;
330	greg	1.12	register int v;
331	greg	1.1	dp = (unsigned short )tarData + jhp->x;
332			for (i = 0; i < hp->x; i++) {
333	greg	1.12	v = inl[i][RED] + (random()&7);
334			if (v > 255) v = 255;
335			*dp = (v&0xf8)<<7;
336			v = inl[i][GRN] + (random()&7);
337			if (v > 255) v = 255;
338			*dp \|= (v&0xf8)<<2;
339			v = inl[i][BLU] + (random()&7);
340			if (v > 255) v = 255;
341			*dp++ \|= v>>3;
342	greg	1.1	}
343			} else { /* hp->dataBits == 24 */
344			register unsigned char *dp;
345			dp = (unsigned char )tarData + j3*hp->x;
346			for (i = 0; i < hp->x; i++) {
347	greg	1.10	*dp++ = inl[i][BLU];
348			*dp++ = inl[i][GRN];
349	greg	1.9	*dp++ = inl[i][RED];
350	greg	1.1	}
351			}
352			}
353			/* write out targa data */
354			writetarga(hp, tarData, stdout);
355
356	greg	2.6	free((void *)inl);
357			free((void *)tarData);
358	greg	1.1	}
359
360
361	schorsch	2.8	static void
362			writet24( /* write out 24-bit targa data */
363			struct hdStruct *h,
364			unsigned char *d,
365			FILE *fp
366			)
367	greg	1.1	{
368			if (h->dataType == IM_RGB) { /* uncompressed */
369	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
370	greg	1.1	quiterr("error writing targa file");
371			return;
372			}
373			quiterr("unsupported output type");
374			}
375
376
377	schorsch	2.8	static void
378			writet16( /* write out 16-bit targa data */
379			struct hdStruct *h,
380			register unsigned short *d,
381			FILE *fp
382			)
383	greg	1.1	{
384			register int cnt;
385
386			if (h->dataType == IM_RGB) { /* uncompressed */
387			for (cnt = h->x*h->y; cnt-- > 0; )
388			putint2(*d++, fp);
389			if (ferror(fp))
390			quiterr("error writing targa file");
391			return;
392			}
393			quiterr("unsupported output type");
394			}
395
396
397	schorsch	2.8	static void
398			readt24( /* read in 24-bit targa data */
399			register struct hdStruct *h,
400			unsigned char *data,
401			FILE *fp
402			)
403	greg	1.1	{
404			register int cnt, c;
405			register unsigned char *dp;
406			int r, g, b;
407
408			if (h->dataType == IM_RGB) { /* uncompressed */
409	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
410	greg	1.1	goto readerr;
411			return;
412			}
413			for (dp = data; dp < data+3h->xh->y; ) {
414			if ((c = getc(fp)) == EOF)
415			goto readerr;
416			cnt = (c & 0x7f) + 1;
417			if (c & 0x80) { /* repeated pixel */
418	greg	1.2	b = getc(fp); g = getc(fp);
419			if ((r = getc(fp)) == EOF)
420	greg	1.1	goto readerr;
421			while (cnt--) {
422	greg	1.2	*dp++ = b;
423			*dp++ = g;
424	greg	1.1	*dp++ = r;
425			}
426			} else /* non-repeating pixels */
427			while (cnt--) {
428			dp++ = getc(fp); dp++ = getc(fp);
429	greg	1.2	if ((r = getc(fp)) == EOF)
430	greg	1.1	goto readerr;
431	greg	1.2	*dp++ = r;
432	greg	1.1	}
433			}
434			return;
435			readerr:
436			quiterr("error reading targa file");
437			}
438
439
440	schorsch	2.8	static void
441			readt16( /* read in 16-bit targa data */
442			register struct hdStruct *h,
443			unsigned short *data,
444			FILE *fp
445			)
446	greg	1.1	{
447			register int cnt, c;
448			register unsigned short *dp;
449
450			if (h->dataType == IM_RGB) { /* uncompressed */
451			dp = data;
452			for (cnt = h->x*h->y; cnt-- > 0; )
453			*dp++ = getint2(fp);
454			return;
455			}
456			for (dp = data; dp < data+h->x*h->y; ) {
457			if ((c = getc(fp)) == EOF)
458			goto readerr;
459			cnt = (c & 0x7f) + 1;
460			if (c & 0x80) { /* repeated pixel */
461			c = getint2(fp);
462			while (cnt--)
463			*dp++ = c;
464			} else /* non-repeating pixels */
465			while (cnt--)
466			*dp++ = getint2(fp);
467			}
468			return;
469			readerr:
470			quiterr("error reading targa file");
471			}