src/px/ra_t8.c

#ifndef lint
static const char       RCSid[] = "$Id: ra_t8.c,v 2.11 2003/05/13 17:58:33 greg Exp $";
#endif
/*
 *  ra_t8.c - program to convert between RADIANCE and
 *              Targa 8-bit color-mapped images.
 *
 *      8/22/88         Adapted from ra_pr.c
 */

#include  <stdio.h>
#include  <time.h>
#include  <math.h>

#include  "platform.h"
#include  "color.h"
#include  "resolu.h"
#include  "targa.h"


#define  goodpic(h)     (my_imType(h) && my_mapType(h))
#define  my_imType(h)   (((h)->dataType==IM_CMAP || (h)->dataType==IM_CCMAP) \
                                && (h)->dataBits==8 && (h)->imType==0)
#define  my_mapType(h)  ((h)->mapType==CM_HASMAP && \
                                ((h)->CMapBits==24 || (h)->CMapBits==32))

#define  taralloc(h)    (BYTE *)emalloc((h)->x*(h)->y)

BYTE  clrtab[256][3];

extern int      samplefac;

extern char     *ecalloc(), *emalloc();

extern long  ftell();

double  gamv = 2.2;                     /* gamv correction */

int  bradj = 0;                         /* brightness adjustment */

char  *progname;

char  errmsg[128];

COLR    *inl;

BYTE    *tarData;

int  xmax, ymax;


main(argc, argv)
int  argc;
char  *argv[];
{
        struct hdStruct  head;
        int  dither = 1;
        int  reverse = 0;
        int  ncolors = 256;
        int  greyscale = 0;
        int  i;
        SET_DEFAULT_BINARY();
        SET_FILE_BINARY(stdin);
        SET_FILE_BINARY(stdout);
        progname = argv[0];
        samplefac = 0;

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'd':
                                dither = !dither;
                                break;
                        case 'g':
                                gamv = atof(argv[++i]);
                                break;
                        case 'r':
                                reverse = !reverse;
                                break;
                        case 'b':
                                greyscale = 1;
                                break;
                        case 'e':
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = atoi(argv[++i]);
                                break;
                        case 'c':
                                ncolors = atoi(argv[++i]);
                                break;
                        case 'n':
                                samplefac = atoi(argv[++i]);
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        if (i < argc-2)
                goto userr;
        if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
                sprintf(errmsg, "cannot open input \"%s\"", argv[i]);
                quiterr(errmsg);
        }
        if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
                sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]);
                quiterr(errmsg);
        }
        if (reverse) {
                                        /* get header */
                if (getthead(&head, NULL, stdin) < 0)
                        quiterr("bad targa file");
                if (!goodpic(&head))
                        quiterr("incompatible format");
                xmax = head.x;
                ymax = head.y;
                                        /* put header */
                newheader("RADIANCE", stdout);
                printargs(i, argv, stdout);
                fputformat(COLRFMT, stdout);
                putchar('\n');
                fprtresolu(xmax, ymax, stdout);
                                        /* convert file */
                tg2ra(&head);
        } else {
                if (getrhead(&head, stdin) < 0)
                        quiterr("bad Radiance input");
                                        /* write header */
                putthead(&head, NULL, stdout);
                                        /* convert file */
                if (greyscale)
                        getgrey(ncolors);
                else
                        getmapped(ncolors, dither);
                                        /* write data */
                writetarga(&head, tarData, stdout);
        }
        quiterr(NULL);
userr:
        fprintf(stderr,
        "Usage: %s [-d][-n samp][-c ncolors][-b][-g gamv][-e +/-stops] input [output]\n",
                        progname);
        fprintf(stderr, "   Or: %s -r [-g gamv][-e +/-stops] [input [output]]\n",
                        progname);
        exit(1);
}


int
getint2(fp)                     /* get a 2-byte positive integer */
register FILE   *fp;
{
        register int  b1, b2;

        if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF)
                quiterr("read error");

        return(b1 | b2<<8);
}


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


quiterr(err)            /* print message and exit */
char  *err;
{
        if (err != NULL) {
                fprintf(stderr, "%s: %s\n", progname, err);
                exit(1);
        }
        exit(0);
}


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


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


getthead(hp, ip, fp)            /* read header from input */
struct hdStruct  *hp;
char  *ip;
register FILE  *fp;
{
        int     nidbytes;

        if ((nidbytes = getc(fp)) == EOF)
                return(-1);
        hp->mapType = getc(fp);
        hp->dataType = getc(fp);
        hp->mapOrig = getint2(fp);
        hp->mapLength = getint2(fp);
        hp->CMapBits = getc(fp);
        hp->XOffset = getint2(fp);
        hp->YOffset = getint2(fp);
        hp->x = getint2(fp);
        hp->y = getint2(fp);
        hp->dataBits = getc(fp);
        hp->imType = getc(fp);

        if (ip != NULL)
                if (nidbytes)
                        fread((char *)ip, nidbytes, 1, fp);
                else
                        *ip = '\0';
        else if (nidbytes)
                fseek(fp, (long)nidbytes, 1);

        return(feof(fp) || ferror(fp) ? -1 : 0);
}


putthead(hp, ip, fp)            /* write header to output */
struct hdStruct  *hp;
char  *ip;
register FILE  *fp;
{
        if (ip != NULL)
                putc(strlen(ip), fp);
        else
                putc(0, fp);
        putc(hp->mapType, fp);
        putc(hp->dataType, fp);
        putint2(hp->mapOrig, fp);
        putint2(hp->mapLength, fp);
        putc(hp->CMapBits, fp);
        putint2(hp->XOffset, fp);
        putint2(hp->YOffset, fp);
        putint2(hp->x, fp);
        putint2(hp->y, fp);
        putc(hp->dataBits, fp);
        putc(hp->imType, fp);

        if (ip != NULL)
                fputs(ip, fp);

        return(ferror(fp) ? -1 : 0);
}


getrhead(h, fp)                 /* load RADIANCE input file header */
register struct hdStruct  *h;
FILE  *fp;
{
                                        /* get header info. */
        if (checkheader(fp, COLRFMT, NULL) < 0 ||
                        fgetresolu(&xmax, &ymax, fp) < 0)
                return(-1);
                                        /* assign header */
        h->textSize = 0;
        h->mapType = CM_HASMAP;
        h->dataType = IM_CMAP;
        h->mapOrig = 0;
        h->mapLength = 256;
        h->CMapBits = 24;
        h->XOffset = 0;
        h->YOffset = 0;
        h->x = xmax;
        h->y = ymax;
        h->dataBits = 8;
        h->imType = 0;
                                        /* allocate scanline */
        inl = (COLR *)emalloc(xmax*sizeof(COLR));
                                        /* allocate targa data */
        tarData = taralloc(h);

        return(0);
}


tg2ra(hp)                       /* targa file to RADIANCE file */
struct hdStruct  *hp;
{
        union {
                BYTE  c3[256][3];
                BYTE  c4[256][4];
        } map;
        COLR  ctab[256];
        COLR  *scanline;
        register int  i, j;

                                        /* get color table */
        if ((hp->CMapBits==24 ? fread((char *)(map.c3+hp->mapOrig),
                                3*hp->mapLength,1,stdin) :
                        fread((char *)(map.c4+hp->mapOrig),
                                4*hp->mapLength,1,stdin)) != 1)
                quiterr("error reading color table");
                                        /* convert table */
        for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++)
                if (hp->CMapBits == 24)
                        setcolr(ctab[i],
                                        pow((map.c3[i][2]+.5)/256.,gamv),
                                        pow((map.c3[i][1]+.5)/256.,gamv),
                                        pow((map.c3[i][0]+.5)/256.,gamv));
                else
                        setcolr(ctab[i],
                                        pow((map.c4[i][3]+.5)/256.,gamv),
                                        pow((map.c4[i][2]+.5)/256.,gamv),
                                        pow((map.c4[i][1]+.5)/256.,gamv));
        if (bradj)
                shiftcolrs(ctab, 256, bradj);
                                        /* allocate targa data */
        tarData = taralloc(hp);
                                        /* get data */
        readtarga(hp, tarData, stdin);
                                        /* allocate input scanline */
        scanline = (COLR *)emalloc(xmax*sizeof(COLR));
                                        /* convert file */
        for (i = ymax-1; i >= 0; i--) {
                for (j = 0; j < xmax; j++)
                        copycolr(scanline[j], ctab[tarData[i*xmax+j]]);
                if (fwritecolrs(scanline, xmax, stdout) < 0)
                        quiterr("error writing RADIANCE file");
        }
        free((void *)scanline);
        free((void *)tarData);
}


getmapped(nc, dith)             /* read in and quantize image */
int  nc;                /* number of colors to use */
int  dith;              /* use dithering? */
{
        long  fpos;
        register int  y;

        setcolrgam(gamv);
        fpos = ftell(stdin);
        if ((samplefac ? neu_init(xmax*ymax) : new_histo(xmax*ymax)) == -1)
                quiterr("cannot initialized histogram");
        for (y = ymax-1; y >= 0; y--) {
                if (freadcolrs(inl, xmax, stdin) < 0)
                        quiterr("error reading Radiance input");
                if (bradj)
                        shiftcolrs(inl, xmax, bradj);
                colrs_gambs(inl, xmax);
                if (samplefac)
                        neu_colrs(inl, xmax);
                else
                        cnt_colrs(inl, xmax);
        }
        if (fseek(stdin, fpos, 0) == EOF)
                quiterr("Radiance input must be from a file");
        if (samplefac)                  /* map colors */
                neu_clrtab(nc);
        else
                new_clrtab(nc);
        for (y = ymax-1; y >= 0; y--) {
                if (freadcolrs(inl, xmax, stdin) < 0)
                        quiterr("error reading Radiance input");
                if (bradj)
                        shiftcolrs(inl, xmax, bradj);
                colrs_gambs(inl, xmax);
                if (samplefac)
                        if (dith)
                                neu_dith_colrs(tarData+y*xmax, inl, xmax);
                        else
                                neu_map_colrs(tarData+y*xmax, inl, xmax);
                else
                        if (dith)
                                dith_colrs(tarData+y*xmax, inl, xmax);
                        else
                                map_colrs(tarData+y*xmax, inl, xmax);
        }
}


getgrey(nc)                     /* read in and convert to greyscale image */
int  nc;                /* number of colors to use */
{
        int  y;
        register BYTE  *dp;
        register int  x;

        setcolrgam(gamv);
        dp = tarData+xmax*ymax;;
        for (y = ymax-1; y >= 0; y--) {
                if (freadcolrs(inl, xmax, stdin) < 0)
                        quiterr("error reading Radiance input");
                if (bradj)
                        shiftcolrs(inl, xmax, bradj);
                x = xmax;
                while (x--)
                        inl[x][GRN] = normbright(inl[x]);
                colrs_gambs(inl, xmax);
                x = xmax;
                if (nc < 256)
                        while (x--)
                                *--dp = ((long)inl[x][GRN]*nc+nc/2)>>8;
                else
                        while (x--)
                                *--dp = inl[x][GRN];
        }
        for (x = 0; x < nc; x++)
                clrtab[x][RED] = clrtab[x][GRN] =
                        clrtab[x][BLU] = ((long)x*256+128)/nc;
}


writetarga(h, d, fp)            /* write out targa data */
struct hdStruct  *h;
BYTE  *d;
FILE  *fp;
{
        register int  i, j;

        for (i = 0; i < h->mapLength; i++)      /* write color map */
                for (j = 2; j >= 0; j--)
                        putc(clrtab[i][j], fp);
        if (h->dataType == IM_CMAP) {           /* uncompressed */
                if (fwrite((char *)d,h->x*sizeof(BYTE),h->y,fp) != h->y)
                        quiterr("error writing targa file");
                return;
        }
        quiterr("unsupported output type");
}


readtarga(h, data, fp)          /* read in targa data */
struct hdStruct  *h;
BYTE  *data;
FILE  *fp;
{
        register int  cnt, c;
        register BYTE   *dp;

        if (h->dataType == IM_CMAP) {           /* uncompressed */
                if (fread((char *)data,h->x*sizeof(BYTE),h->y,fp) != h->y)
                        goto readerr;
                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 */
                        if ((c = getc(fp)) == EOF)
                                goto readerr;
                        while (cnt--)
                                *dp++ = c;
                } else                          /* non-repeating pixels */
                        while (cnt--) {
                                if ((c = getc(fp)) == EOF)
                                        goto readerr;
                                *dp++ = c;
                        }
        }
        return;
readerr:
        quiterr("error reading targa file");
}
Revision:	2.12
Committed:	Thu Jun 5 19:29:34 2003 UTC (20 years, 10 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.11:	+6 -19 lines
Log Message:	Macros for setting binary file mode. Replacing MSDOS by _WIN32.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.12	static const char RCSid[] = "$Id: ra_t8.c,v 2.11 2003/05/13 17:58:33 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* ra_t8.c - program to convert between RADIANCE and
6			* Targa 8-bit color-mapped images.
7			*
8			* 8/22/88 Adapted from ra_pr.c
9			*/
10
11			#include <stdio.h>
12	greg	2.10	#include <time.h>
13	schorsch	2.12	#include <math.h>
14	greg	2.10
15	schorsch	2.12	#include "platform.h"
16	greg	1.1	#include "color.h"
17	greg	1.12	#include "resolu.h"
18	greg	1.1	#include "targa.h"
19
20
21	greg	2.3	#define goodpic(h) (my_imType(h) && my_mapType(h))
22			#define my_imType(h) (((h)->dataType==IM_CMAP \|\| (h)->dataType==IM_CCMAP) \
23	greg	1.1	&& (h)->dataBits==8 && (h)->imType==0)
24	greg	2.3	#define my_mapType(h) ((h)->mapType==CM_HASMAP && \
25	greg	1.1	((h)->CMapBits==24 \|\| (h)->CMapBits==32))
26
27	greg	2.4	#define taralloc(h) (BYTE )emalloc((h)->x(h)->y)
28	greg	1.1
29	greg	2.7	BYTE clrtab[256][3];
30	greg	1.1
31	greg	2.7	extern int samplefac;
32
33	greg	1.1	extern char ecalloc(), emalloc();
34
35			extern long ftell();
36
37	greg	2.4	double gamv = 2.2; /* gamv correction */
38	greg	1.1
39	greg	1.10	int bradj = 0; /* brightness adjustment */
40
41	greg	1.1	char *progname;
42
43			char errmsg[128];
44
45	greg	1.7	COLR *inl;
46	greg	1.1
47	greg	2.4	BYTE *tarData;
48	greg	1.1
49			int xmax, ymax;
50
51
52			main(argc, argv)
53			int argc;
54			char *argv[];
55			{
56	greg	2.3	struct hdStruct head;
57	greg	1.1	int dither = 1;
58			int reverse = 0;
59			int ncolors = 256;
60			int greyscale = 0;
61			int i;
62	schorsch	2.12	SET_DEFAULT_BINARY();
63			SET_FILE_BINARY(stdin);
64			SET_FILE_BINARY(stdout);
65	greg	1.1	progname = argv[0];
66	greg	2.7	samplefac = 0;
67	greg	1.1
68			for (i = 1; i < argc; i++)
69			if (argv[i][0] == '-')
70			switch (argv[i][1]) {
71			case 'd':
72			dither = !dither;
73			break;
74			case 'g':
75	greg	2.4	gamv = atof(argv[++i]);
76	greg	1.1	break;
77			case 'r':
78			reverse = !reverse;
79			break;
80			case 'b':
81			greyscale = 1;
82			break;
83	greg	1.10	case 'e':
84			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
85			goto userr;
86			bradj = atoi(argv[++i]);
87			break;
88	greg	1.1	case 'c':
89			ncolors = atoi(argv[++i]);
90			break;
91	greg	2.7	case 'n':
92			samplefac = atoi(argv[++i]);
93			break;
94	greg	1.1	default:
95			goto userr;
96			}
97			else
98			break;
99
100	greg	2.4	if (i < argc-2)
101			goto userr;
102			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
103			sprintf(errmsg, "cannot open input \"%s\"", argv[i]);
104			quiterr(errmsg);
105			}
106			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
107			sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]);
108			quiterr(errmsg);
109			}
110	greg	1.1	if (reverse) {
111			/* get header */
112			if (getthead(&head, NULL, stdin) < 0)
113			quiterr("bad targa file");
114			if (!goodpic(&head))
115			quiterr("incompatible format");
116			xmax = head.x;
117			ymax = head.y;
118			/* put header */
119	greg	2.6	newheader("RADIANCE", stdout);
120	greg	1.6	printargs(i, argv, stdout);
121	greg	1.9	fputformat(COLRFMT, stdout);
122	greg	1.1	putchar('\n');
123	greg	1.12	fprtresolu(xmax, ymax, stdout);
124	greg	1.1	/* convert file */
125			tg2ra(&head);
126			} else {
127	greg	2.4	if (getrhead(&head, stdin) < 0)
128			quiterr("bad Radiance input");
129	greg	1.1	/* write header */
130			putthead(&head, NULL, stdout);
131			/* convert file */
132			if (greyscale)
133	greg	2.4	getgrey(ncolors);
134	greg	1.1	else
135	greg	2.4	getmapped(ncolors, dither);
136	greg	1.1	/* write data */
137			writetarga(&head, tarData, stdout);
138			}
139			quiterr(NULL);
140			userr:
141			fprintf(stderr,
142	greg	2.8	"Usage: %s [-d][-n samp][-c ncolors][-b][-g gamv][-e +/-stops] input [output]\n",
143	greg	1.1	progname);
144	greg	2.4	fprintf(stderr, " Or: %s -r [-g gamv][-e +/-stops] [input [output]]\n",
145	greg	1.1	progname);
146			exit(1);
147			}
148
149
150			int
151			getint2(fp) /* get a 2-byte positive integer */
152			register FILE *fp;
153			{
154			register int b1, b2;
155
156			if ((b1 = getc(fp)) == EOF \|\| (b2 = getc(fp)) == EOF)
157			quiterr("read error");
158
159			return(b1 \| b2<<8);
160			}
161
162
163			putint2(i, fp) /* put a 2-byte positive integer */
164			register int i;
165			register FILE *fp;
166			{
167			putc(i&0xff, fp);
168			putc(i>>8&0xff, fp);
169			}
170
171
172			quiterr(err) /* print message and exit */
173			char *err;
174			{
175			if (err != NULL) {
176			fprintf(stderr, "%s: %s\n", progname, err);
177			exit(1);
178			}
179			exit(0);
180			}
181
182
183	greg	2.10	void
184	greg	1.1	eputs(s)
185			char *s;
186			{
187			fputs(s, stderr);
188			}
189
190
191	greg	2.10	void
192	greg	1.1	quit(code)
193			int code;
194			{
195			exit(code);
196			}
197
198
199			getthead(hp, ip, fp) /* read header from input */
200	greg	2.3	struct hdStruct *hp;
201	greg	1.1	char *ip;
202			register FILE *fp;
203			{
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	1.4	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			putthead(hp, ip, fp) /* write header to output */
233	greg	2.3	struct hdStruct *hp;
234	greg	1.1	char *ip;
235			register FILE *fp;
236			{
237			if (ip != NULL)
238			putc(strlen(ip), fp);
239			else
240			putc(0, fp);
241			putc(hp->mapType, fp);
242			putc(hp->dataType, fp);
243			putint2(hp->mapOrig, fp);
244			putint2(hp->mapLength, fp);
245			putc(hp->CMapBits, fp);
246			putint2(hp->XOffset, fp);
247			putint2(hp->YOffset, fp);
248			putint2(hp->x, fp);
249			putint2(hp->y, fp);
250			putc(hp->dataBits, fp);
251			putc(hp->imType, fp);
252
253			if (ip != NULL)
254			fputs(ip, fp);
255
256			return(ferror(fp) ? -1 : 0);
257			}
258
259
260	greg	2.4	getrhead(h, fp) /* load RADIANCE input file header */
261	greg	1.1	register struct hdStruct *h;
262	greg	2.4	FILE *fp;
263	greg	1.1	{
264	greg	1.9	/* get header info. */
265	greg	2.4	if (checkheader(fp, COLRFMT, NULL) < 0 \|\|
266			fgetresolu(&xmax, &ymax, fp) < 0)
267			return(-1);
268	greg	1.1	/* assign header */
269			h->textSize = 0;
270			h->mapType = CM_HASMAP;
271			h->dataType = IM_CMAP;
272			h->mapOrig = 0;
273			h->mapLength = 256;
274			h->CMapBits = 24;
275			h->XOffset = 0;
276			h->YOffset = 0;
277			h->x = xmax;
278			h->y = ymax;
279			h->dataBits = 8;
280			h->imType = 0;
281			/* allocate scanline */
282	greg	1.7	inl = (COLR )emalloc(xmaxsizeof(COLR));
283	greg	1.1	/* allocate targa data */
284			tarData = taralloc(h);
285
286	greg	2.4	return(0);
287	greg	1.1	}
288
289
290			tg2ra(hp) /* targa file to RADIANCE file */
291	greg	2.3	struct hdStruct *hp;
292	greg	1.1	{
293			union {
294			BYTE c3[256][3];
295			BYTE c4[256][4];
296			} map;
297			COLR ctab[256];
298			COLR *scanline;
299			register int i, j;
300
301			/* get color table */
302	greg	1.12	if ((hp->CMapBits==24 ? fread((char *)(map.c3+hp->mapOrig),
303			3*hp->mapLength,1,stdin) :
304			fread((char *)(map.c4+hp->mapOrig),
305			4*hp->mapLength,1,stdin)) != 1)
306	greg	1.1	quiterr("error reading color table");
307			/* convert table */
308			for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++)
309			if (hp->CMapBits == 24)
310			setcolr(ctab[i],
311	greg	2.4	pow((map.c3[i][2]+.5)/256.,gamv),
312			pow((map.c3[i][1]+.5)/256.,gamv),
313			pow((map.c3[i][0]+.5)/256.,gamv));
314	greg	1.1	else
315			setcolr(ctab[i],
316	greg	2.4	pow((map.c4[i][3]+.5)/256.,gamv),
317			pow((map.c4[i][2]+.5)/256.,gamv),
318			pow((map.c4[i][1]+.5)/256.,gamv));
319	greg	1.10	if (bradj)
320			shiftcolrs(ctab, 256, bradj);
321	greg	1.1	/* allocate targa data */
322			tarData = taralloc(hp);
323			/* get data */
324			readtarga(hp, tarData, stdin);
325			/* allocate input scanline */
326			scanline = (COLR )emalloc(xmaxsizeof(COLR));
327			/* convert file */
328			for (i = ymax-1; i >= 0; i--) {
329			for (j = 0; j < xmax; j++)
330			copycolr(scanline[j], ctab[tarData[i*xmax+j]]);
331			if (fwritecolrs(scanline, xmax, stdout) < 0)
332			quiterr("error writing RADIANCE file");
333			}
334	greg	2.10	free((void *)scanline);
335			free((void *)tarData);
336	greg	1.1	}
337
338
339	greg	2.4	getmapped(nc, dith) /* read in and quantize image */
340			int nc; /* number of colors to use */
341			int dith; /* use dithering? */
342	greg	1.1	{
343	greg	2.4	long fpos;
344			register int y;
345	greg	1.1
346	greg	2.4	setcolrgam(gamv);
347			fpos = ftell(stdin);
348	greg	2.7	if ((samplefac ? neu_init(xmaxymax) : new_histo(xmaxymax)) == -1)
349			quiterr("cannot initialized histogram");
350	greg	2.4	for (y = ymax-1; y >= 0; y--) {
351			if (freadcolrs(inl, xmax, stdin) < 0)
352			quiterr("error reading Radiance input");
353			if (bradj)
354			shiftcolrs(inl, xmax, bradj);
355			colrs_gambs(inl, xmax);
356	greg	2.7	if (samplefac)
357			neu_colrs(inl, xmax);
358			else
359			cnt_colrs(inl, xmax);
360	greg	1.1	}
361	greg	2.4	if (fseek(stdin, fpos, 0) == EOF)
362			quiterr("Radiance input must be from a file");
363	greg	2.7	if (samplefac) /* map colors */
364			neu_clrtab(nc);
365			else
366			new_clrtab(nc);
367	greg	2.4	for (y = ymax-1; y >= 0; y--) {
368			if (freadcolrs(inl, xmax, stdin) < 0)
369			quiterr("error reading Radiance input");
370			if (bradj)
371			shiftcolrs(inl, xmax, bradj);
372			colrs_gambs(inl, xmax);
373	greg	2.7	if (samplefac)
374			if (dith)
375			neu_dith_colrs(tarData+y*xmax, inl, xmax);
376			else
377			neu_map_colrs(tarData+y*xmax, inl, xmax);
378	greg	2.4	else
379	greg	2.7	if (dith)
380			dith_colrs(tarData+y*xmax, inl, xmax);
381			else
382			map_colrs(tarData+y*xmax, inl, xmax);
383	greg	2.4	}
384	greg	1.1	}
385
386
387	greg	2.4	getgrey(nc) /* read in and convert to greyscale image */
388			int nc; /* number of colors to use */
389	greg	1.1	{
390	greg	2.4	int y;
391			register BYTE *dp;
392			register int x;
393
394			setcolrgam(gamv);
395			dp = tarData+xmax*ymax;;
396			for (y = ymax-1; y >= 0; y--) {
397			if (freadcolrs(inl, xmax, stdin) < 0)
398			quiterr("error reading Radiance input");
399			if (bradj)
400			shiftcolrs(inl, xmax, bradj);
401	greg	2.5	x = xmax;
402			while (x--)
403			inl[x][GRN] = normbright(inl[x]);
404	greg	2.4	colrs_gambs(inl, xmax);
405			x = xmax;
406			if (nc < 256)
407			while (x--)
408	greg	2.5	--dp = ((long)inl[x][GRN]nc+nc/2)>>8;
409	greg	2.4	else
410			while (x--)
411	greg	2.5	*--dp = inl[x][GRN];
412	greg	2.4	}
413			for (x = 0; x < nc; x++)
414			clrtab[x][RED] = clrtab[x][GRN] =
415	greg	2.5	clrtab[x][BLU] = ((long)x*256+128)/nc;
416	greg	1.1	}
417
418
419			writetarga(h, d, fp) /* write out targa data */
420	greg	2.3	struct hdStruct *h;
421	greg	2.4	BYTE *d;
422	greg	1.1	FILE *fp;
423			{
424	greg	2.4	register int i, j;
425
426			for (i = 0; i < h->mapLength; i++) /* write color map */
427			for (j = 2; j >= 0; j--)
428			putc(clrtab[i][j], fp);
429	greg	1.1	if (h->dataType == IM_CMAP) { /* uncompressed */
430	greg	2.4	if (fwrite((char )d,h->xsizeof(BYTE),h->y,fp) != h->y)
431	greg	1.1	quiterr("error writing targa file");
432			return;
433			}
434			quiterr("unsupported output type");
435			}
436
437
438			readtarga(h, data, fp) /* read in targa data */
439	greg	2.3	struct hdStruct *h;
440	greg	2.4	BYTE *data;
441	greg	1.1	FILE *fp;
442			{
443			register int cnt, c;
444	greg	2.4	register BYTE *dp;
445	greg	1.1
446			if (h->dataType == IM_CMAP) { /* uncompressed */
447	greg	2.4	if (fread((char )data,h->xsizeof(BYTE),h->y,fp) != h->y)
448	greg	1.1	goto readerr;
449			return;
450			}
451			for (dp = data; dp < data+h->x*h->y; ) {
452			if ((c = getc(fp)) == EOF)
453			goto readerr;
454			cnt = (c & 0x7f) + 1;
455			if (c & 0x80) { /* repeated pixel */
456			if ((c = getc(fp)) == EOF)
457			goto readerr;
458			while (cnt--)
459			*dp++ = c;
460			} else /* non-repeating pixels */
461			while (cnt--) {
462			if ((c = getc(fp)) == EOF)
463			goto readerr;
464			*dp++ = c;
465			}
466			}
467			return;
468			readerr:
469			quiterr("error reading targa file");
470			}