src/hd/rhpict.c

#ifndef lint
static const char       RCSid[] = "$Id: rhpict.c,v 3.13 2003/07/21 22:30:18 schorsch Exp $";
#endif
/*
 * Radiance holodeck picture generator
 */

#include <string.h>

#include "rholo.h"
#include "view.h"

char    *progname;              /* our program name */
char    *hdkfile;               /* holodeck file name */
char    gargc;                  /* global argc */
char    **gargv;                /* global argv */

VIEW    myview = STDVIEW;       /* current output view */
int     xres = 512, yres = 512; /* max. horizontal and vertical resolution */
char    *outspec = NULL;        /* output file specification */
double  randfrac = -1.;         /* random resampling fraction */
double  pixaspect = 1.;         /* pixel aspect ratio */
int     seqstart = 0;           /* sequence start frame */
double  expval = 1.;            /* exposure value */

COLOR   *mypixel;               /* pixels being rendered */
float   *myweight;              /* weights (used to compute final pixels) */
float   *mydepth;               /* depth values (visibility culling) */
int     hres, vres;             /* current horizontal and vertical res. */

extern int      nowarn;         /* turn warnings off? */


main(argc, argv)
int     argc;
char    *argv[];
{
        int     i, rval;

        gargc = argc; gargv = argv;
        progname = argv[0];                     /* get arguments */
        for (i = 1; i < argc && argv[i][0] == '-'; i++) {
                rval = getviewopt(&myview, argc-i, argv+i);
                if (rval >= 0) {                /* view option */
                        i += rval;
                        continue;
                }
                switch (argv[i][1]) {
                case 'w':                       /* turn off warnings */
                        nowarn++;
                        break;
                case 'p':                       /* pixel aspect/exposure */
                        if (badarg(argc-i-1,argv+i+1,"f"))
                                goto userr;
                        if (argv[i][2] == 'a')
                                pixaspect = atof(argv[++i]);
                        else if (argv[i][2] == 'e') {
                                expval = atof(argv[++i]);
                                if ((argv[i][0] == '-') | (argv[i][0] == '+'))
                                        expval = pow(2., expval);
                        } else
                                goto userr;
                        break;
                case 'x':                       /* horizontal resolution */
                        if (badarg(argc-i-1,argv+i+1,"i"))
                                goto userr;
                        xres = atoi(argv[++i]);
                        break;
                case 'y':                       /* vertical resolution */
                        if (badarg(argc-i-1,argv+i+1,"i"))
                                goto userr;
                        yres = atoi(argv[++i]);
                        break;
                case 'o':                       /* output file specificaiton */
                        if (badarg(argc-i-1,argv+i+1,"s"))
                                goto userr;
                        outspec = argv[++i];
                        break;
                case 'r':                       /* random sampling */
                        if (badarg(argc-i-1,argv+i+1,"f"))
                                goto userr;
                        randfrac = atof(argv[++i]);
                        break;
                case 's':                       /* smooth sampling */
                        randfrac = -1.;
                        break;
                case 'S':                       /* sequence start */
                        if (badarg(argc-i-1,argv+i+1,"i"))
                                goto userr;
                        seqstart = atoi(argv[++i]);
                        break;
                case 'v':                       /* view file */
                        if (argv[i][2]!='f' || badarg(argc-i-1,argv+i+1,"s"))
                                goto userr;
                        rval = viewfile(argv[++i], &myview, NULL);
                        if (rval < 0) {
                                sprintf(errmsg, "cannot open view file \"%s\"",
                                                argv[i]);
                                error(SYSTEM, errmsg);
                        } else if (rval == 0) {
                                sprintf(errmsg, "bad view file \"%s\"",
                                                argv[i]);
                                error(USER, errmsg);
                        }
                        break;
                default:
                        goto userr;
                }
        }
                                                /* open holodeck file */
        if (i != argc-1)
                goto userr;
        hdkfile = argv[i];
        initialize();
                                                /* render picture(s) */
        if (seqstart <= 0)
                dopicture(0);
        else
                while (nextview(&myview, stdin) != EOF)
                        dopicture(seqstart++);
        quit(0);                                /* all done! */
userr:
        fprintf(stderr,
"Usage: %s [-w][-r rf][-pa pa][-pe ex][-x hr][-y vr][-S stfn][-o outp][view] input.hdk\n",
                        progname);
        quit(1);
}


dopicture(fn)                   /* render view from holodeck */
int     fn;
{
        char    *err;
        int     rval;
        BEAMLIST        blist;

        if ((err = setview(&myview)) != NULL) {
                sprintf(errmsg, "%s -- skipping frame %d", err, fn);
                error(WARNING, errmsg);
                return;
        }
        startpicture(fn);               /* open output picture */
                                        /* determine relevant beams */
        viewbeams(&myview, hres, vres, &blist);
                                        /* render image */
        if (blist.nb > 0) {
                render_frame(blist.bl, blist.nb);
                free((void *)blist.bl);
        } else {
                sprintf(errmsg, "no section visible in frame %d", fn);
                error(WARNING, errmsg);
        }
        rval = endpicture();            /* write pixel values */
        if (rval < 0) {
                sprintf(errmsg, "error writing frame %d", fn);
                error(SYSTEM, errmsg);
        }
#ifdef DEBUG
        if (blist.nb > 0 & rval > 0) {
                sprintf(errmsg, "%d unrendered pixels in frame %d (%.1f%%)",
                                rval, fn, 100.*rval/(hres*vres));
                error(WARNING, errmsg);
        }
#endif
}


render_frame(bl, nb)            /* render frame from beam values */
register PACKHEAD       *bl;
int     nb;
{
        extern void     pixBeam();
        register HDBEAMI        *bil;
        register int    i;

        if (nb <= 0) return;
        if ((bil = (HDBEAMI *)malloc(nb*sizeof(HDBEAMI))) == NULL)
                error(SYSTEM, "out of memory in render_frame");
        for (i = nb; i--; ) {
                bil[i].h = hdlist[bl[i].hd];
                bil[i].b = bl[i].bi;
        }
        hdloadbeams(bil, nb, pixBeam);
        pixFinish(randfrac);
        free((void *)bil);
}


startpicture(fn)                /* initialize picture for rendering & output */
int     fn;
{
        extern char     VersionID[];
        double  pa = pixaspect;
        char    fname[256];
                                /* compute picture resolution */
        hres = xres; vres = yres;
        normaspect(viewaspect(&myview), &pa, &hres, &vres);
                                /* prepare output */
        if (outspec != NULL) {
                sprintf(fname, outspec, fn);
                if (freopen(fname, "w", stdout) == NULL) {
                        sprintf(errmsg, "cannot open output \"%s\"", fname);
                        error(SYSTEM, errmsg);
                }
        }
                                /* write header */
        newheader("RADIANCE", stdout);
        printf("SOFTWARE= %s\n", VersionID);
        printargs(gargc, gargv, stdout);
        if (fn)
                printf("FRAME=%d\n", fn);
        fputs(VIEWSTR, stdout);
        fprintview(&myview, stdout);
        fputc('\n', stdout);
        if ((pa < 0.99) | (pa > 1.01))
                fputaspect(pa, stdout);
        if ((expval < 0.99) | (expval > 1.01))
                fputexpos(expval, stdout);
        fputformat(COLRFMT, stdout);
        fputc('\n', stdout);
                                /* write resolution (standard order) */
        fprtresolu(hres, vres, stdout);
                                /* prepare image buffers */
        memset((char *)mypixel, '\0', hres*vres*sizeof(COLOR));
        memset((char *)myweight, '\0', hres*vres*sizeof(float));
        memset((char *)mydepth, '\0', hres*vres*sizeof(float));
}


int
endpicture()                    /* finish and write out pixels */
{
        int     lastr = -1, nunrend = 0;
        int32   lastp, lastrp;
        register int32  p;
        register double d;
                                /* compute final pixel values */
        for (p = hres*vres; p--; ) {
                if (myweight[p] <= FTINY) {
                        if (lastr >= 0) {
                                if (p/hres == lastp/hres)
                                        copycolor(mypixel[p], mypixel[lastp]);
                                else
                                        copycolor(mypixel[p], mypixel[lastrp]);
                        }
                        nunrend++;
                        continue;
                }
                d = expval/myweight[p];
                scalecolor(mypixel[p], d);
                if ((lastp=p)/hres != lastr)
                        lastr = (lastrp=p)/hres;
        }
                                /* write each scanline */
        for (p = vres; p--; )
                if (fwritescan(mypixel+p*hres, hres, stdout) < 0)
                        return(-1);
        if (fflush(stdout) == EOF)
                return(-1);
        return(nunrend);
}


initialize()                    /* initialize holodeck and buffers */
{
        int     fd;
        FILE    *fp;
        int     n;
        int32   nextloc;
                                        /* open holodeck file */
        if ((fp = fopen(hdkfile, "r")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for reading", hdkfile);
                error(SYSTEM, errmsg);
        }
                                        /* check header format */
        checkheader(fp, HOLOFMT, NULL);
                                        /* check magic number */
        if (getw(fp) != HOLOMAGIC) {
                sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
                                hdkfile);
                error(USER, errmsg);
        }
        nextloc = ftell(fp);                    /* get stdio position */
        fd = dup(fileno(fp));                   /* dup file descriptor */
        fclose(fp);                             /* done with stdio */
        for (n = 0; nextloc > 0L; n++) {        /* initialize each section */
                lseek(fd, (off_t)nextloc, 0);
                read(fd, (char *)&nextloc, sizeof(nextloc));
                hdinit(fd, NULL);
        }
                                        /* allocate picture buffer */
        mypixel = (COLOR *)bmalloc(xres*yres*sizeof(COLOR));
        myweight = (float *)bmalloc(xres*yres*sizeof(float));
        mydepth = (float *)bmalloc(xres*yres*sizeof(float));
        if ((mypixel == NULL) | (myweight == NULL) | (mydepth == NULL))
                error(SYSTEM, "out of memory in initialize");
}


void
eputs(s)                        /* put error message to stderr */
register char  *s;
{
        static int  midline = 0;

        if (!*s)
                return;
        if (!midline++) {       /* prepend line with program name */
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}
Revision:	3.14
Committed:	Sun Jul 27 22:12:02 2003 UTC (22 years, 3 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 3.13:	+5 -5 lines
Log Message:	Added grouping parens to reduce ambiguity warnings.
#	User	Rev	Content
1	gwlarson	3.1	#ifndef lint
2	schorsch	3.14	static const char RCSid[] = "$Id: rhpict.c,v 3.13 2003/07/21 22:30:18 schorsch Exp $";
3	gwlarson	3.1	#endif
4			/*
5			* Radiance holodeck picture generator
6			*/
7
8	schorsch	3.11	#include <string.h>
9
10	gwlarson	3.1	#include "rholo.h"
11			#include "view.h"
12
13			char progname; / our program name */
14			char hdkfile; / holodeck file name */
15	gwlarson	3.7	char gargc; /* global argc */
16			char *gargv; / global argv */
17	gwlarson	3.1
18			VIEW myview = STDVIEW; /* current output view */
19			int xres = 512, yres = 512; /* max. horizontal and vertical resolution */
20			char outspec = NULL; / output file specification */
21	gwlarson	3.6	double randfrac = -1.; /* random resampling fraction */
22	gwlarson	3.1	double pixaspect = 1.; /* pixel aspect ratio */
23			int seqstart = 0; /* sequence start frame */
24			double expval = 1.; /* exposure value */
25
26			COLOR mypixel; / pixels being rendered */
27			float myweight; / weights (used to compute final pixels) */
28	gwlarson	3.2	float mydepth; / depth values (visibility culling) */
29	gwlarson	3.1	int hres, vres; /* current horizontal and vertical res. */
30
31			extern int nowarn; /* turn warnings off? */
32
33
34			main(argc, argv)
35			int argc;
36			char *argv[];
37			{
38			int i, rval;
39
40	gwlarson	3.7	gargc = argc; gargv = argv;
41	gwlarson	3.1	progname = argv[0]; /* get arguments */
42			for (i = 1; i < argc && argv[i][0] == '-'; i++) {
43			rval = getviewopt(&myview, argc-i, argv+i);
44			if (rval >= 0) { /* view option */
45			i += rval;
46			continue;
47			}
48			switch (argv[i][1]) {
49			case 'w': /* turn off warnings */
50			nowarn++;
51			break;
52			case 'p': /* pixel aspect/exposure */
53			if (badarg(argc-i-1,argv+i+1,"f"))
54			goto userr;
55	gwlarson	3.3	if (argv[i][2] == 'a')
56	gwlarson	3.1	pixaspect = atof(argv[++i]);
57	gwlarson	3.3	else if (argv[i][2] == 'e') {
58	gwlarson	3.1	expval = atof(argv[++i]);
59	schorsch	3.14	if ((argv[i][0] == '-') \| (argv[i][0] == '+'))
60	gwlarson	3.1	expval = pow(2., expval);
61			} else
62			goto userr;
63			break;
64			case 'x': /* horizontal resolution */
65			if (badarg(argc-i-1,argv+i+1,"i"))
66			goto userr;
67			xres = atoi(argv[++i]);
68			break;
69			case 'y': /* vertical resolution */
70			if (badarg(argc-i-1,argv+i+1,"i"))
71			goto userr;
72			yres = atoi(argv[++i]);
73			break;
74			case 'o': /* output file specificaiton */
75			if (badarg(argc-i-1,argv+i+1,"s"))
76			goto userr;
77			outspec = argv[++i];
78			break;
79	gwlarson	3.5	case 'r': /* random sampling */
80	gwlarson	3.6	if (badarg(argc-i-1,argv+i+1,"f"))
81			goto userr;
82			randfrac = atof(argv[++i]);
83	gwlarson	3.5	break;
84			case 's': /* smooth sampling */
85	gwlarson	3.6	randfrac = -1.;
86	gwlarson	3.5	break;
87	gwlarson	3.1	case 'S': /* sequence start */
88			if (badarg(argc-i-1,argv+i+1,"i"))
89			goto userr;
90			seqstart = atoi(argv[++i]);
91			break;
92			case 'v': /* view file */
93	gwlarson	3.4	if (argv[i][2]!='f' \|\| badarg(argc-i-1,argv+i+1,"s"))
94	gwlarson	3.1	goto userr;
95			rval = viewfile(argv[++i], &myview, NULL);
96			if (rval < 0) {
97			sprintf(errmsg, "cannot open view file \"%s\"",
98			argv[i]);
99			error(SYSTEM, errmsg);
100			} else if (rval == 0) {
101			sprintf(errmsg, "bad view file \"%s\"",
102			argv[i]);
103			error(USER, errmsg);
104			}
105			break;
106			default:
107			goto userr;
108			}
109			}
110			/* open holodeck file */
111	gwlarson	3.3	if (i != argc-1)
112	gwlarson	3.1	goto userr;
113	gwlarson	3.3	hdkfile = argv[i];
114	gwlarson	3.1	initialize();
115			/* render picture(s) */
116			if (seqstart <= 0)
117			dopicture(0);
118			else
119			while (nextview(&myview, stdin) != EOF)
120			dopicture(seqstart++);
121			quit(0); /* all done! */
122			userr:
123			fprintf(stderr,
124	gwlarson	3.6	"Usage: %s [-w][-r rf][-pa pa][-pe ex][-x hr][-y vr][-S stfn][-o outp][view] input.hdk\n",
125	gwlarson	3.1	progname);
126			quit(1);
127			}
128
129
130			dopicture(fn) /* render view from holodeck */
131			int fn;
132			{
133			char *err;
134			int rval;
135			BEAMLIST blist;
136
137			if ((err = setview(&myview)) != NULL) {
138			sprintf(errmsg, "%s -- skipping frame %d", err, fn);
139			error(WARNING, errmsg);
140			return;
141			}
142			startpicture(fn); /* open output picture */
143			/* determine relevant beams */
144			viewbeams(&myview, hres, vres, &blist);
145			/* render image */
146			if (blist.nb > 0) {
147			render_frame(blist.bl, blist.nb);
148	greg	3.8	free((void *)blist.bl);
149	gwlarson	3.1	} else {
150			sprintf(errmsg, "no section visible in frame %d", fn);
151			error(WARNING, errmsg);
152			}
153			rval = endpicture(); /* write pixel values */
154			if (rval < 0) {
155			sprintf(errmsg, "error writing frame %d", fn);
156			error(SYSTEM, errmsg);
157			}
158	gwlarson	3.3	#ifdef DEBUG
159	gwlarson	3.1	if (blist.nb > 0 & rval > 0) {
160	gwlarson	3.3	sprintf(errmsg, "%d unrendered pixels in frame %d (%.1f%%)",
161			rval, fn, 100.rval/(hresvres));
162	gwlarson	3.1	error(WARNING, errmsg);
163			}
164	gwlarson	3.3	#endif
165	gwlarson	3.1	}
166
167
168			render_frame(bl, nb) /* render frame from beam values */
169			register PACKHEAD *bl;
170			int nb;
171			{
172	greg	3.12	extern void pixBeam();
173	gwlarson	3.1	register HDBEAMI *bil;
174			register int i;
175
176			if (nb <= 0) return;
177			if ((bil = (HDBEAMI )malloc(nbsizeof(HDBEAMI))) == NULL)
178			error(SYSTEM, "out of memory in render_frame");
179			for (i = nb; i--; ) {
180			bil[i].h = hdlist[bl[i].hd];
181			bil[i].b = bl[i].bi;
182			}
183	gwlarson	3.2	hdloadbeams(bil, nb, pixBeam);
184	gwlarson	3.6	pixFinish(randfrac);
185	greg	3.8	free((void *)bil);
186	gwlarson	3.1	}
187
188
189			startpicture(fn) /* initialize picture for rendering & output */
190			int fn;
191			{
192			extern char VersionID[];
193			double pa = pixaspect;
194			char fname[256];
195			/* compute picture resolution */
196			hres = xres; vres = yres;
197			normaspect(viewaspect(&myview), &pa, &hres, &vres);
198			/* prepare output */
199			if (outspec != NULL) {
200			sprintf(fname, outspec, fn);
201			if (freopen(fname, "w", stdout) == NULL) {
202			sprintf(errmsg, "cannot open output \"%s\"", fname);
203			error(SYSTEM, errmsg);
204			}
205			}
206			/* write header */
207			newheader("RADIANCE", stdout);
208			printf("SOFTWARE= %s\n", VersionID);
209	gwlarson	3.7	printargs(gargc, gargv, stdout);
210	gwlarson	3.1	if (fn)
211			printf("FRAME=%d\n", fn);
212			fputs(VIEWSTR, stdout);
213			fprintview(&myview, stdout);
214			fputc('\n', stdout);
215	schorsch	3.14	if ((pa < 0.99) \| (pa > 1.01))
216	gwlarson	3.1	fputaspect(pa, stdout);
217	schorsch	3.14	if ((expval < 0.99) \| (expval > 1.01))
218	gwlarson	3.1	fputexpos(expval, stdout);
219			fputformat(COLRFMT, stdout);
220			fputc('\n', stdout);
221			/* write resolution (standard order) */
222			fprtresolu(hres, vres, stdout);
223			/* prepare image buffers */
224	schorsch	3.11	memset((char )mypixel, '\0', hresvres*sizeof(COLOR));
225			memset((char )myweight, '\0', hresvres*sizeof(float));
226			memset((char )mydepth, '\0', hresvres*sizeof(float));
227	gwlarson	3.1	}
228
229
230			int
231			endpicture() /* finish and write out pixels */
232			{
233	gwlarson	3.4	int lastr = -1, nunrend = 0;
234	greg	3.10	int32 lastp, lastrp;
235			register int32 p;
236	gwlarson	3.1	register double d;
237			/* compute final pixel values */
238			for (p = hres*vres; p--; ) {
239			if (myweight[p] <= FTINY) {
240	schorsch	3.13	if (lastr >= 0) {
241	gwlarson	3.4	if (p/hres == lastp/hres)
242			copycolor(mypixel[p], mypixel[lastp]);
243			else
244			copycolor(mypixel[p], mypixel[lastrp]);
245	schorsch	3.13	}
246	gwlarson	3.1	nunrend++;
247			continue;
248			}
249			d = expval/myweight[p];
250			scalecolor(mypixel[p], d);
251	gwlarson	3.4	if ((lastp=p)/hres != lastr)
252			lastr = (lastrp=p)/hres;
253	gwlarson	3.1	}
254			/* write each scanline */
255	gwlarson	3.4	for (p = vres; p--; )
256			if (fwritescan(mypixel+p*hres, hres, stdout) < 0)
257	gwlarson	3.1	return(-1);
258			if (fflush(stdout) == EOF)
259			return(-1);
260			return(nunrend);
261			}
262
263
264			initialize() /* initialize holodeck and buffers */
265			{
266			int fd;
267			FILE *fp;
268			int n;
269	greg	3.10	int32 nextloc;
270	gwlarson	3.1	/* open holodeck file */
271			if ((fp = fopen(hdkfile, "r")) == NULL) {
272			sprintf(errmsg, "cannot open \"%s\" for reading", hdkfile);
273			error(SYSTEM, errmsg);
274			}
275			/* check header format */
276			checkheader(fp, HOLOFMT, NULL);
277			/* check magic number */
278			if (getw(fp) != HOLOMAGIC) {
279			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
280			hdkfile);
281			error(USER, errmsg);
282			}
283			nextloc = ftell(fp); /* get stdio position */
284			fd = dup(fileno(fp)); /* dup file descriptor */
285			fclose(fp); /* done with stdio */
286			for (n = 0; nextloc > 0L; n++) { /* initialize each section */
287	greg	3.8	lseek(fd, (off_t)nextloc, 0);
288	gwlarson	3.1	read(fd, (char *)&nextloc, sizeof(nextloc));
289			hdinit(fd, NULL);
290			}
291			/* allocate picture buffer */
292			mypixel = (COLOR )bmalloc(xresyres*sizeof(COLOR));
293			myweight = (float )bmalloc(xresyres*sizeof(float));
294	gwlarson	3.2	mydepth = (float )bmalloc(xresyres*sizeof(float));
295	schorsch	3.14	if ((mypixel == NULL) \| (myweight == NULL) \| (mydepth == NULL))
296	gwlarson	3.1	error(SYSTEM, "out of memory in initialize");
297			}
298
299
300	greg	3.8	void
301	gwlarson	3.1	eputs(s) /* put error message to stderr */
302			register char *s;
303			{
304			static int midline = 0;
305
306			if (!*s)
307			return;
308			if (!midline++) { /* prepend line with program name */
309			fputs(progname, stderr);
310			fputs(": ", stderr);
311			}
312			fputs(s, stderr);
313			if (s[strlen(s)-1] == '\n') {
314			fflush(stderr);
315			midline = 0;
316			}
317			}