src/px/ra_t16.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_t16.c,v 2.9 2018/03/20 18:45:04 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  *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:	2.10
Committed:	Sat Dec 28 18:05:14 2019 UTC (4 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R3, HEAD
Changes since 2.9:	+1 -4 lines
Log Message:	Removed redundant include files
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.10	static const char RCSid[] = "$Id: ra_t16.c,v 2.9 2018/03/20 18:45:04 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
13	schorsch	2.7	#include "platform.h"
14	greg	2.9	#include "rtio.h"
15	schorsch	2.8	#include "rtmisc.h"
16	greg	1.1	#include "color.h"
17	greg	1.15	#include "resolu.h"
18	greg	1.5	#include "random.h"
19	greg	1.1	#include "targa.h"
20
21			#define goodpic(h) (((h)->dataType==IM_RGB \|\| (h)->dataType==IM_CRGB) \
22			&& ((h)->dataBits==16 \|\| (h)->dataBits==24))
23
24			#define taralloc(h) (unsigned char )emalloc((h)->x(h)->y*(h)->dataBits/8)
25
26	schorsch	2.8	#define readtarga(h,d,f) ((h)->dataBits==16 ? \
27			readt16(h,(unsigned short*)d,f) : readt24(h,d,f))
28	greg	1.1
29	schorsch	2.8	#define writetarga(h,d,f) ((h)->dataBits==16 ? \
30			writet16(h,(unsigned short*)d,f) : writet24(h,d,f))
31	greg	1.1
32	greg	2.4	double gamcor = 2.2; /* gamma correction */
33	greg	1.13	int bradj = 0; /* brightness adjustment */
34	greg	1.1	char *progname;
35	schorsch	2.8	char msg[128];
36	greg	1.1
37	schorsch	2.8	static int getint2(FILE *fp);
38			static void putint2(int i, FILE *fp);
39			static void quiterr(char *err);
40			static int getthead(struct hdStruct hp, char ip, FILE *fp);
41			static int putthead(struct hdStruct hp, char ip, FILE *fp);
42			static void tg2ra(struct hdStruct *hp);
43			static void ra2tg(struct hdStruct *hp);
44			static void writet24(struct hdStruct h, unsigned char d, FILE *fp);
45			static void writet16(struct hdStruct h, unsigned short d, FILE *fp);
46			static void readt24(struct hdStruct h, unsigned char data, FILE *fp);
47			static void readt16(struct hdStruct h, unsigned short data, FILE *fp);
48	greg	1.1
49
50	schorsch	2.8	int
51			main(int argc, char *argv[])
52	greg	1.1	{
53			struct hdStruct head;
54			int reverse = 0;
55			int i;
56	schorsch	2.7	SET_DEFAULT_BINARY();
57			SET_FILE_BINARY(stdin);
58			SET_FILE_BINARY(stdout);
59	greg	1.1	progname = argv[0];
60
61			head.dataBits = 16;
62			for (i = 1; i < argc; i++)
63			if (argv[i][0] == '-')
64			switch (argv[i][1]) {
65			case 'g':
66	greg	2.4	gamcor = atof(argv[++i]);
67	greg	1.1	break;
68			case 'r':
69			reverse = !reverse;
70			break;
71			case '2':
72			head.dataBits = 16;
73			break;
74			case '3':
75			head.dataBits = 24;
76			break;
77	greg	1.13	case 'e':
78			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
79			goto userr;
80			bradj = atoi(argv[++i]);
81			break;
82	greg	1.1	default:
83			goto userr;
84			}
85			else
86			break;
87
88			if (i < argc-2)
89			goto userr;
90			/* open input file */
91			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
92			sprintf(msg, "can't open input \"%s\"", argv[i]);
93			quiterr(msg);
94			}
95			/* open output file */
96			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
97			sprintf(msg, "can't open output \"%s\"", argv[i+1]);
98			quiterr(msg);
99			}
100	greg	1.9	/* set gamma */
101	greg	2.4	setcolrgam(gamcor);
102	greg	1.1	/* convert */
103			if (reverse) {
104			/* get header */
105			if (getthead(&head, NULL, stdin) < 0)
106			quiterr("bad targa file");
107			if (!goodpic(&head))
108			quiterr("incompatible format");
109			/* put header */
110	greg	2.5	newheader("RADIANCE", stdout);
111	greg	1.7	printargs(i, argv, stdout);
112	greg	1.11	fputformat(COLRFMT, stdout);
113	greg	1.1	putchar('\n');
114	greg	1.15	fprtresolu(head.x, head.y, stdout);
115	greg	1.1	/* convert file */
116			tg2ra(&head);
117			} else {
118	greg	1.11	if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
119	greg	1.15	fgetresolu(&head.x, &head.y, stdin) < 0)
120	greg	1.1	quiterr("bad picture file");
121			/* assign header */
122			head.textSize = 0;
123			head.mapType = CM_NOMAP;
124			head.dataType = IM_RGB;
125			head.XOffset = 0;
126			head.YOffset = 0;
127			head.imType = 0;
128			/* write header */
129			putthead(&head, NULL, stdout);
130			/* convert file */
131			ra2tg(&head);
132			}
133			exit(0);
134			userr:
135	greg	1.13	fprintf(stderr, "Usage: %s [-2\|-3\|-r][-g gamma][-e +/-stops] [input [output]]\n",
136	greg	1.1	progname);
137			exit(1);
138			}
139
140
141	schorsch	2.8	static int
142			getint2( /* get a 2-byte positive integer */
143			register FILE *fp
144			)
145	greg	1.1	{
146			register int b1, b2;
147
148			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
149			quiterr("read error");
150
151			return(b1 \| b2<<8);
152			}
153
154
155	schorsch	2.8	static void
156			putint2( /* put a 2-byte positive integer */
157			register int i,
158			register FILE *fp
159			)
160	greg	1.1	{
161			putc(i&0xff, fp);
162			putc(i>>8&0xff, fp);
163			}
164
165
166	schorsch	2.8	static void
167			quiterr( /* print message and exit */
168			char *err
169			)
170	greg	1.1	{
171			fprintf(stderr, "%s: %s\n", progname, err);
172			exit(1);
173			}
174
175
176	greg	2.6	void
177	schorsch	2.8	eputs(
178			char *s
179			)
180	greg	1.1	{
181			fputs(s, stderr);
182			}
183
184
185	greg	2.6	void
186	schorsch	2.8	quit(
187			int code
188			)
189	greg	1.1	{
190			exit(code);
191			}
192
193
194	schorsch	2.8	static int
195			getthead( /* read header from input */
196			struct hdStruct *hp,
197			char *ip,
198			register FILE *fp
199			)
200	greg	1.1	{
201			int nidbytes;
202
203			if ((nidbytes = getc(fp)) == EOF)
204			return(-1);
205			hp->mapType = getc(fp);
206			hp->dataType = getc(fp);
207			hp->mapOrig = getint2(fp);
208			hp->mapLength = getint2(fp);
209			hp->CMapBits = getc(fp);
210			hp->XOffset = getint2(fp);
211			hp->YOffset = getint2(fp);
212			hp->x = getint2(fp);
213			hp->y = getint2(fp);
214			hp->dataBits = getc(fp);
215			hp->imType = getc(fp);
216
217			if (ip != NULL)
218			if (nidbytes)
219	greg	1.6	fread((char *)ip, nidbytes, 1, fp);
220	greg	1.1	else
221			*ip = '\0';
222			else if (nidbytes)
223			fseek(fp, (long)nidbytes, 1);
224
225			return(feof(fp) \|\| ferror(fp) ? -1 : 0);
226			}
227
228
229	schorsch	2.8	static int
230			putthead( /* write header to output */
231			struct hdStruct *hp,
232			char *ip,
233			register FILE *fp
234			)
235	greg	1.1	{
236			if (ip != NULL)
237			putc(strlen(ip), fp);
238			else
239			putc(0, fp);
240			putc(hp->mapType, fp);
241			putc(hp->dataType, fp);
242			putint2(hp->mapOrig, fp);
243			putint2(hp->mapLength, fp);
244			putc(hp->CMapBits, fp);
245			putint2(hp->XOffset, fp);
246			putint2(hp->YOffset, fp);
247			putint2(hp->x, fp);
248			putint2(hp->y, fp);
249			putc(hp->dataBits, fp);
250			putc(hp->imType, fp);
251
252			if (ip != NULL)
253			fputs(ip, fp);
254
255			return(ferror(fp) ? -1 : 0);
256			}
257
258
259	schorsch	2.8	static void
260			tg2ra( /* targa file to RADIANCE file */
261			struct hdStruct *hp
262			)
263	greg	1.1	{
264	greg	1.9	COLR *scanline;
265	greg	1.1	unsigned char *tarData;
266			register int i, j;
267			/* skip color table */
268			if (hp->mapType == CM_HASMAP)
269			fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1);
270			/* allocate targa data */
271			tarData = taralloc(hp);
272			/* get data */
273			readtarga(hp, tarData, stdin);
274			/* allocate input scanline */
275	greg	1.9	scanline = (COLR )emalloc(hp->xsizeof(COLR));
276	greg	1.1	/* convert file */
277			for (i = hp->y-1; i >= 0; i--) {
278			if (hp->dataBits == 16) {
279			register unsigned short *dp;
280			dp = (unsigned short )tarData + ihp->x;
281			for (j = 0; j < hp->x; j++) {
282	greg	1.9	scanline[j][RED] = *dp>>7 & 0xf8;
283			scanline[j][GRN] = *dp>>2 & 0xf8;
284			scanline[j][BLU] = *dp<<3 & 0xf8;
285	greg	1.1	dp++;
286			}
287			} else { /* hp->dataBits == 24 */
288			register unsigned char *dp;
289			dp = (unsigned char )tarData + i3*hp->x;
290			for (j = 0; j < hp->x; j++) {
291	greg	1.9	scanline[j][RED] = dp[2];
292			scanline[j][GRN] = dp[1];
293			scanline[j][BLU] = dp[0];
294	greg	1.1	dp += 3;
295			}
296			}
297	greg	1.9	gambs_colrs(scanline, hp->x);
298	greg	1.13	if (bradj)
299			shiftcolrs(scanline, hp->x, bradj);
300	greg	1.9	if (fwritecolrs(scanline, hp->x, stdout) < 0)
301	greg	1.1	quiterr("error writing RADIANCE file");
302			}
303	greg	2.6	free((void *)scanline);
304			free((void *)tarData);
305	greg	1.1	}
306
307
308	schorsch	2.8	static void
309			ra2tg( /* convert radiance to targa file */
310			struct hdStruct *hp
311			)
312	greg	1.1	{
313	greg	1.3	register int i, j;
314	greg	1.1	unsigned char *tarData;
315	greg	1.9	COLR *inl;
316	greg	1.1	/* allocate space for data */
317	greg	1.9	inl = (COLR )emalloc(hp->xsizeof(COLR));
318	greg	1.1	tarData = taralloc(hp);
319			/* convert file */
320			for (j = hp->y-1; j >= 0; j--) {
321	greg	1.9	if (freadcolrs(inl, hp->x, stdin) < 0)
322	greg	1.1	quiterr("error reading RADIANCE file");
323	greg	1.13	if (bradj)
324			shiftcolrs(inl, hp->x, bradj);
325	greg	1.9	colrs_gambs(inl, hp->x);
326	greg	1.1	if (hp->dataBits == 16) {
327			register unsigned short *dp;
328	greg	1.12	register int v;
329	greg	1.1	dp = (unsigned short )tarData + jhp->x;
330			for (i = 0; i < hp->x; i++) {
331	greg	1.12	v = inl[i][RED] + (random()&7);
332			if (v > 255) v = 255;
333			*dp = (v&0xf8)<<7;
334			v = inl[i][GRN] + (random()&7);
335			if (v > 255) v = 255;
336			*dp \|= (v&0xf8)<<2;
337			v = inl[i][BLU] + (random()&7);
338			if (v > 255) v = 255;
339			*dp++ \|= v>>3;
340	greg	1.1	}
341			} else { /* hp->dataBits == 24 */
342			register unsigned char *dp;
343			dp = (unsigned char )tarData + j3*hp->x;
344			for (i = 0; i < hp->x; i++) {
345	greg	1.10	*dp++ = inl[i][BLU];
346			*dp++ = inl[i][GRN];
347	greg	1.9	*dp++ = inl[i][RED];
348	greg	1.1	}
349			}
350			}
351			/* write out targa data */
352			writetarga(hp, tarData, stdout);
353
354	greg	2.6	free((void *)inl);
355			free((void *)tarData);
356	greg	1.1	}
357
358
359	schorsch	2.8	static void
360			writet24( /* write out 24-bit targa data */
361			struct hdStruct *h,
362			unsigned char *d,
363			FILE *fp
364			)
365	greg	1.1	{
366			if (h->dataType == IM_RGB) { /* uncompressed */
367	greg	1.6	if (fwrite((char )d, 3h->x, h->y, fp) != h->y)
368	greg	1.1	quiterr("error writing targa file");
369			return;
370			}
371			quiterr("unsupported output type");
372			}
373
374
375	schorsch	2.8	static void
376			writet16( /* write out 16-bit targa data */
377			struct hdStruct *h,
378			register unsigned short *d,
379			FILE *fp
380			)
381	greg	1.1	{
382			register int cnt;
383
384			if (h->dataType == IM_RGB) { /* uncompressed */
385			for (cnt = h->x*h->y; cnt-- > 0; )
386			putint2(*d++, fp);
387			if (ferror(fp))
388			quiterr("error writing targa file");
389			return;
390			}
391			quiterr("unsupported output type");
392			}
393
394
395	schorsch	2.8	static void
396			readt24( /* read in 24-bit targa data */
397			register struct hdStruct *h,
398			unsigned char *data,
399			FILE *fp
400			)
401	greg	1.1	{
402			register int cnt, c;
403			register unsigned char *dp;
404			int r, g, b;
405
406			if (h->dataType == IM_RGB) { /* uncompressed */
407	greg	1.6	if (fread((char )data, 3h->x, h->y, fp) != h->y)
408	greg	1.1	goto readerr;
409			return;
410			}
411			for (dp = data; dp < data+3h->xh->y; ) {
412			if ((c = getc(fp)) == EOF)
413			goto readerr;
414			cnt = (c & 0x7f) + 1;
415			if (c & 0x80) { /* repeated pixel */
416	greg	1.2	b = getc(fp); g = getc(fp);
417			if ((r = getc(fp)) == EOF)
418	greg	1.1	goto readerr;
419			while (cnt--) {
420	greg	1.2	*dp++ = b;
421			*dp++ = g;
422	greg	1.1	*dp++ = r;
423			}
424			} else /* non-repeating pixels */
425			while (cnt--) {
426			dp++ = getc(fp); dp++ = getc(fp);
427	greg	1.2	if ((r = getc(fp)) == EOF)
428	greg	1.1	goto readerr;
429	greg	1.2	*dp++ = r;
430	greg	1.1	}
431			}
432			return;
433			readerr:
434			quiterr("error reading targa file");
435			}
436
437
438	schorsch	2.8	static void
439			readt16( /* read in 16-bit targa data */
440			register struct hdStruct *h,
441			unsigned short *data,
442			FILE *fp
443			)
444	greg	1.1	{
445			register int cnt, c;
446			register unsigned short *dp;
447
448			if (h->dataType == IM_RGB) { /* uncompressed */
449			dp = data;
450			for (cnt = h->x*h->y; cnt-- > 0; )
451			*dp++ = getint2(fp);
452			return;
453			}
454			for (dp = data; dp < data+h->x*h->y; ) {
455			if ((c = getc(fp)) == EOF)
456			goto readerr;
457			cnt = (c & 0x7f) + 1;
458			if (c & 0x80) { /* repeated pixel */
459			c = getint2(fp);
460			while (cnt--)
461			*dp++ = c;
462			} else /* non-repeating pixels */
463			while (cnt--)
464			*dp++ = getint2(fp);
465			}
466			return;
467			readerr:
468			quiterr("error reading targa file");
469			}