src/px/ra_ppm.c

/* Copyright (c) 1992 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  program to convert between RADIANCE and Poskanzer Pixmaps
 */

#include  <stdio.h>

#ifdef MSDOS
#include  <fcntl.h>
#endif

#include  <ctype.h>

#include  "color.h"

#include  "resolu.h"

extern double  pow();

extern char  *malloc();

int  agryscan(), bgryscan(), aclrscan(), bclrscan();

int  bradj = 0;                         /* brightness adjustment */

int  maxval = 255;                      /* maximum primary value */

char  *progname;

int  xmax, ymax;


main(argc, argv)
int  argc;
char  *argv[];
{
        char  inpbuf[2];
        double  gamma = 2.2;
        int  binflag = 1;
        int  reverse = 0;
        int  ptype;
        int  i;
        
        progname = argv[0];

        for (i = 1; i < argc; i++)
                if (argv[i][0] == '-')
                        switch (argv[i][1]) {
                        case 'g':
                                gamma = atof(argv[++i]);
                                break;
                        case 'e':
                                if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
                                        goto userr;
                                bradj = atoi(argv[++i]);
                                break;
                        case 'a':
                                binflag = 0;
                                break;
                        case 'r':
                                reverse = !reverse;
                                break;
                        default:
                                goto userr;
                        }
                else
                        break;

        if (i < argc-2)
                goto userr;
        if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
                fprintf(stderr, "%s: can't open input \"%s\"\n",
                                progname, argv[i]);
                exit(1);
        }
        if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
                fprintf(stderr, "can't open output \"%s\"\n",
                                progname, argv[i+1]);
                exit(1);
        }
        setcolrgam(gamma);
        if (reverse) {
                                        /* get header */
                if (read(fileno(stdin), inpbuf, 2) != 2 || inpbuf[0] != 'P')
                        quiterr("input not a Poskanzer Pixmap");
                ptype = inpbuf[1];
#ifdef MSDOS
                if (ptype > 4)
                        setmode(fileno(stdin), O_BINARY);
                setmode(fileno(stdout), O_BINARY);
#endif
                xmax = scanint(stdin);
                ymax = scanint(stdin);
                maxval = scanint(stdin);
                                        /* put header */
                printargs(i, argv, stdout);
                fputformat(COLRFMT, stdout);
                putchar('\n');
                fprtresolu(xmax, ymax, stdout);
                                        /* convert file */
                switch (ptype) {
                case '2':
                        ppm2ra(agryscan);
                        break;
                case '5':
                        ppm2ra(bgryscan);
                        break;
                case '3':
                        ppm2ra(aclrscan);
                        break;
                case '6':
                        ppm2ra(bclrscan);
                        break;
                default:
                        quiterr("unsupported Pixmap type");
                }
        } else {
#ifdef MSDOS
                setmode(fileno(stdin), O_BINARY);
                if (binflag)
                        setmode(fileno(stdout), O_BINARY);
#endif
                                        /* get header info. */
                if (checkheader(stdin, COLRFMT, NULL) < 0 ||
                                fgetresolu(&xmax, &ymax, stdin) < 0)
                        quiterr("bad picture format");
                                        /* write PPM header */
                printf("P%c\n%d %d\n%d\n", binflag ? '6' : '3',
                                xmax, ymax, maxval);
                                        /* convert file */
                ra2ppm(binflag);
        }
        exit(0);
userr:
        fprintf(stderr,
                "Usage: %s [-r][-a][-g gamma][-e +/-stops] [input [output]]\n",
                        progname);
        exit(1);
}


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


ppm2ra(getscan)         /* convert color Pixmap to Radiance picture */
int  (*getscan)();
{
        COLR    *scanout;
        register int    x;
        int     y;
                                                /* allocate scanline */
        scanout = (COLR *)malloc(xmax*sizeof(COLR));
        if (scanout == NULL)
                quiterr("out of memory in ppm2ra");
                                                /* convert image */
        for (y = ymax-1; y >= 0; y--) {
                if ((*getscan)(scanout, xmax, stdin) < 0)
                        quiterr("error reading Pixmap");
                gambs_colrs(scanout, xmax);
                if (bradj)
                        shiftcolrs(scanout, xmax, bradj);
                if (fwritecolrs(scanout, xmax, stdout) < 0)
                        quiterr("error writing Radiance picture");
        }
                                                /* free scanline */
        free((char *)scanout);
}


ra2ppm(binary)          /* convert Radiance picture to Pixmap */
int  binary;
{
        COLR    *scanin;
        register int    x;
        int     y;
                                                /* allocate scanline */
        scanin = (COLR *)malloc(xmax*sizeof(COLR));
        if (scanin == NULL)
                quiterr("out of memory in ra2pr");
                                                /* convert image */
        for (y = ymax-1; y >= 0; y--) {
                if (freadcolrs(scanin, xmax, stdin) < 0)
                        quiterr("error reading Radiance picture");
                if (bradj)
                        shiftcolrs(scanin, xmax, bradj);
                colrs_gambs(scanin, xmax);
                if (binary)
                        for (x = 0; x < xmax; x++) {
                                putc(scanin[x][RED], stdout);
                                putc(scanin[x][GRN], stdout);
                                putc(scanin[x][BLU], stdout);
                        }
                else
                        for (x = 0; x < xmax; x++)
                                printf("%d %d %d\n", scanin[x][RED],
                                                scanin[x][GRN],
                                                scanin[x][BLU]);
                if (ferror(stdout))
                        quiterr("error writing Pixmap");
        }
                                                /* free scanline */
        free((char *)scanin);
}


agryscan(scan, len, fp)                 /* get an ASCII greyscale scanline */
register COLR  *scan;
register int  len;
FILE  *fp;
{
        while (len-- > 0) {
                scan[0][RED] =
                scan[0][GRN] =
                scan[0][BLU] = normval(scanint(fp));
                scan++;
        }
        return(0);
}


bgryscan(scan, len, fp)                 /* get a binary greyscale scanline */
register COLR  *scan;
int  len;
register FILE  *fp;
{
        register int  c;

        while (len-- > 0) {
                if ((c = getc(fp)) == EOF)
                        return(-1);
                if (maxval != 255)
                        c = normval(c);
                scan[0][RED] =
                scan[0][GRN] =
                scan[0][BLU] = c;
                scan++;
        }
        return(0);
}


aclrscan(scan, len, fp)                 /* get an ASCII color scanline */
register COLR  *scan;
register int  len;
FILE  *fp;
{
        while (len-- > 0) {
                scan[0][RED] = normval(scanint(fp));
                scan[0][GRN] = normval(scanint(fp));
                scan[0][BLU] = normval(scanint(fp));
                scan++;
        }
        return(0);
}


bclrscan(scan, len, fp)                 /* get a binary color scanline */
register COLR  *scan;
int  len;
register FILE  *fp;
{
        int  r, g, b;

        while (len-- > 0) {
                r = getc(fp);
                g = getc(fp);
                if ((b = getc(fp)) == EOF)
                        return(-1);
                if (maxval == 255) {
                        scan[0][RED] = r;
                        scan[0][GRN] = g;
                        scan[0][BLU] = b;
                } else {
                        scan[0][RED] = normval(r);
                        scan[0][GRN] = normval(g);
                        scan[0][BLU] = normval(b);
                }
                scan++;
        }
        return(0);
}


int
scanint(fp)                     /* scan the next positive integer value */
register FILE  *fp;
{
        register int  i, c;
tryagain:
        while (isspace(c = getc(fp)))
                ;
        if (c == EOF)
                quiterr("unexpected end of file");
        if (c == '#') {         /* comment */
                while ((c = getc(fp)) != EOF && c != '\n')
                        ;
                goto tryagain;
        }
                                /* should be integer */
        i = 0;
        do {
                if (!isdigit(c))
                        quiterr("error reading integer");
                i = 10*i + c - '0';
                c = getc(fp);
        } while (c != EOF && !isspace(c));
        return(i);
}


int
normval(v)                      /* normalize a value to [0,255] */
register int  v;
{
        if (v >= maxval)
                return(255);
        if (maxval == 255)
                return(v);
        return(v*255L/maxval);
}
Revision:	2.3
Committed:	Mon Sep 21 12:14:55 1992 UTC (33 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.2:	+20 -3 lines
Log Message:	Changes for PC port
#	User	Rev	Content
1	greg	2.3	/* Copyright (c) 1992 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* program to convert between RADIANCE and Poskanzer Pixmaps
9			*/
10
11			#include <stdio.h>
12
13	greg	2.3	#ifdef MSDOS
14			#include <fcntl.h>
15			#endif
16
17	greg	1.1	#include <ctype.h>
18
19			#include "color.h"
20
21	greg	1.2	#include "resolu.h"
22
23	greg	2.2	extern double pow();
24	greg	1.1
25	greg	2.3	extern char *malloc();
26
27	greg	1.1	int agryscan(), bgryscan(), aclrscan(), bclrscan();
28
29			int bradj = 0; /* brightness adjustment */
30
31			int maxval = 255; /* maximum primary value */
32
33			char *progname;
34
35			int xmax, ymax;
36
37
38			main(argc, argv)
39			int argc;
40			char *argv[];
41			{
42	greg	2.3	char inpbuf[2];
43	greg	1.1	double gamma = 2.2;
44			int binflag = 1;
45			int reverse = 0;
46			int ptype;
47			int i;
48
49			progname = argv[0];
50
51			for (i = 1; i < argc; i++)
52			if (argv[i][0] == '-')
53			switch (argv[i][1]) {
54			case 'g':
55			gamma = atof(argv[++i]);
56			break;
57			case 'e':
58			if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
59			goto userr;
60			bradj = atoi(argv[++i]);
61			break;
62			case 'a':
63			binflag = 0;
64			break;
65			case 'r':
66			reverse = !reverse;
67			break;
68			default:
69			goto userr;
70			}
71			else
72			break;
73
74			if (i < argc-2)
75			goto userr;
76			if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) {
77			fprintf(stderr, "%s: can't open input \"%s\"\n",
78			progname, argv[i]);
79			exit(1);
80			}
81			if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) {
82			fprintf(stderr, "can't open output \"%s\"\n",
83			progname, argv[i+1]);
84			exit(1);
85			}
86			setcolrgam(gamma);
87			if (reverse) {
88			/* get header */
89	greg	2.3	if (read(fileno(stdin), inpbuf, 2) != 2 \|\| inpbuf[0] != 'P')
90	greg	1.1	quiterr("input not a Poskanzer Pixmap");
91	greg	2.3	ptype = inpbuf[1];
92			#ifdef MSDOS
93			if (ptype > 4)
94			setmode(fileno(stdin), O_BINARY);
95			setmode(fileno(stdout), O_BINARY);
96			#endif
97	greg	1.1	xmax = scanint(stdin);
98			ymax = scanint(stdin);
99			maxval = scanint(stdin);
100			/* put header */
101			printargs(i, argv, stdout);
102			fputformat(COLRFMT, stdout);
103			putchar('\n');
104	greg	1.2	fprtresolu(xmax, ymax, stdout);
105	greg	1.1	/* convert file */
106			switch (ptype) {
107			case '2':
108			ppm2ra(agryscan);
109			break;
110			case '5':
111			ppm2ra(bgryscan);
112			break;
113			case '3':
114			ppm2ra(aclrscan);
115			break;
116			case '6':
117			ppm2ra(bclrscan);
118			break;
119			default:
120			quiterr("unsupported Pixmap type");
121			}
122			} else {
123	greg	2.3	#ifdef MSDOS
124			setmode(fileno(stdin), O_BINARY);
125			if (binflag)
126			setmode(fileno(stdout), O_BINARY);
127			#endif
128	greg	1.1	/* get header info. */
129			if (checkheader(stdin, COLRFMT, NULL) < 0 \|\|
130	greg	1.2	fgetresolu(&xmax, &ymax, stdin) < 0)
131	greg	1.1	quiterr("bad picture format");
132			/* write PPM header */
133			printf("P%c\n%d %d\n%d\n", binflag ? '6' : '3',
134			xmax, ymax, maxval);
135			/* convert file */
136			ra2ppm(binflag);
137			}
138			exit(0);
139			userr:
140			fprintf(stderr,
141			"Usage: %s [-r][-a][-g gamma][-e +/-stops] [input [output]]\n",
142			progname);
143			exit(1);
144			}
145
146
147			quiterr(err) /* print message and exit */
148			char *err;
149			{
150			if (err != NULL) {
151			fprintf(stderr, "%s: %s\n", progname, err);
152			exit(1);
153			}
154			exit(0);
155			}
156
157
158			ppm2ra(getscan) /* convert color Pixmap to Radiance picture */
159			int (*getscan)();
160			{
161			COLR *scanout;
162			register int x;
163			int y;
164			/* allocate scanline */
165			scanout = (COLR )malloc(xmaxsizeof(COLR));
166			if (scanout == NULL)
167			quiterr("out of memory in ppm2ra");
168			/* convert image */
169			for (y = ymax-1; y >= 0; y--) {
170			if ((*getscan)(scanout, xmax, stdin) < 0)
171			quiterr("error reading Pixmap");
172			gambs_colrs(scanout, xmax);
173			if (bradj)
174			shiftcolrs(scanout, xmax, bradj);
175			if (fwritecolrs(scanout, xmax, stdout) < 0)
176			quiterr("error writing Radiance picture");
177			}
178			/* free scanline */
179			free((char *)scanout);
180			}
181
182
183			ra2ppm(binary) /* convert Radiance picture to Pixmap */
184			int binary;
185			{
186			COLR *scanin;
187			register int x;
188			int y;
189			/* allocate scanline */
190			scanin = (COLR )malloc(xmaxsizeof(COLR));
191			if (scanin == NULL)
192			quiterr("out of memory in ra2pr");
193			/* convert image */
194			for (y = ymax-1; y >= 0; y--) {
195			if (freadcolrs(scanin, xmax, stdin) < 0)
196			quiterr("error reading Radiance picture");
197			if (bradj)
198			shiftcolrs(scanin, xmax, bradj);
199			colrs_gambs(scanin, xmax);
200			if (binary)
201			for (x = 0; x < xmax; x++) {
202			putc(scanin[x][RED], stdout);
203			putc(scanin[x][GRN], stdout);
204			putc(scanin[x][BLU], stdout);
205			}
206			else
207			for (x = 0; x < xmax; x++)
208			printf("%d %d %d\n", scanin[x][RED],
209			scanin[x][GRN],
210			scanin[x][BLU]);
211			if (ferror(stdout))
212			quiterr("error writing Pixmap");
213			}
214			/* free scanline */
215			free((char *)scanin);
216			}
217
218
219			agryscan(scan, len, fp) /* get an ASCII greyscale scanline */
220			register COLR *scan;
221			register int len;
222			FILE *fp;
223			{
224			while (len-- > 0) {
225			scan[0][RED] =
226			scan[0][GRN] =
227			scan[0][BLU] = normval(scanint(fp));
228			scan++;
229			}
230			return(0);
231			}
232
233
234			bgryscan(scan, len, fp) /* get a binary greyscale scanline */
235			register COLR *scan;
236			int len;
237			register FILE *fp;
238			{
239			register int c;
240
241			while (len-- > 0) {
242			if ((c = getc(fp)) == EOF)
243			return(-1);
244			if (maxval != 255)
245			c = normval(c);
246			scan[0][RED] =
247			scan[0][GRN] =
248			scan[0][BLU] = c;
249			scan++;
250			}
251			return(0);
252			}
253
254
255			aclrscan(scan, len, fp) /* get an ASCII color scanline */
256			register COLR *scan;
257			register int len;
258			FILE *fp;
259			{
260			while (len-- > 0) {
261			scan[0][RED] = normval(scanint(fp));
262			scan[0][GRN] = normval(scanint(fp));
263			scan[0][BLU] = normval(scanint(fp));
264			scan++;
265			}
266			return(0);
267			}
268
269
270			bclrscan(scan, len, fp) /* get a binary color scanline */
271			register COLR *scan;
272			int len;
273			register FILE *fp;
274			{
275			int r, g, b;
276
277			while (len-- > 0) {
278			r = getc(fp);
279			g = getc(fp);
280			if ((b = getc(fp)) == EOF)
281			return(-1);
282			if (maxval == 255) {
283			scan[0][RED] = r;
284			scan[0][GRN] = g;
285			scan[0][BLU] = b;
286			} else {
287			scan[0][RED] = normval(r);
288			scan[0][GRN] = normval(g);
289			scan[0][BLU] = normval(b);
290			}
291			scan++;
292			}
293			return(0);
294			}
295
296
297			int
298			scanint(fp) /* scan the next positive integer value */
299			register FILE *fp;
300			{
301			register int i, c;
302			tryagain:
303			while (isspace(c = getc(fp)))
304			;
305			if (c == EOF)
306			quiterr("unexpected end of file");
307			if (c == '#') { /* comment */
308			while ((c = getc(fp)) != EOF && c != '\n')
309			;
310			goto tryagain;
311			}
312			/* should be integer */
313			i = 0;
314			do {
315			if (!isdigit(c))
316			quiterr("error reading integer");
317			i = 10*i + c - '0';
318			c = getc(fp);
319			} while (c != EOF && !isspace(c));
320			return(i);
321			}
322
323
324			int
325			normval(v) /* normalize a value to [0,255] */
326			register int v;
327			{
328			if (v >= maxval)
329			return(255);
330			if (maxval == 255)
331			return(v);
332			return(v*255L/maxval);
333			}