src/hd/rhpict.c

/* Copyright (c) 1999 Silicon Graphics, Inc. */

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

/*
 * Radiance holodeck picture generator
 */

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

char    *progname;              /* our program name */
char    *hdkfile;               /* holodeck file name */

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;

        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((char *)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 int      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((char *)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);
        printf("%s %s\n", progname, hdkfile);
        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 */
        bzero((char *)mypixel, hres*vres*sizeof(COLOR));
        bzero((char *)myweight, hres*vres*sizeof(float));
        bzero((char *)mydepth, hres*vres*sizeof(float));
}


int
endpicture()                    /* finish and write out pixels */
{
        int     lastr = -1, nunrend = 0;
        int4    lastp, lastrp;
        register int4   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 */
{
        extern long     ftell();
        int     fd;
        FILE    *fp;
        int     n;
        int4    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, (long)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");
}


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:	3.6
Committed:	Tue Mar 9 14:55:53 1999 UTC (26 years, 8 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 3.5:	+7 -5 lines
Log Message:	second cut at random sampling -- variable randomness
#	User	Rev	Content
1	gwlarson	3.1	/* Copyright (c) 1999 Silicon Graphics, Inc. */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ SGI";
5			#endif
6
7			/*
8			* Radiance holodeck picture generator
9			*/
10
11			#include "rholo.h"
12			#include "view.h"
13			#include "resolu.h"
14
15			char progname; / our program name */
16			char hdkfile; / holodeck file name */
17
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			progname = argv[0]; /* get arguments */
41			for (i = 1; i < argc && argv[i][0] == '-'; i++) {
42			rval = getviewopt(&myview, argc-i, argv+i);
43			if (rval >= 0) { /* view option */
44			i += rval;
45			continue;
46			}
47			switch (argv[i][1]) {
48			case 'w': /* turn off warnings */
49			nowarn++;
50			break;
51			case 'p': /* pixel aspect/exposure */
52			if (badarg(argc-i-1,argv+i+1,"f"))
53			goto userr;
54	gwlarson	3.3	if (argv[i][2] == 'a')
55	gwlarson	3.1	pixaspect = atof(argv[++i]);
56	gwlarson	3.3	else if (argv[i][2] == 'e') {
57	gwlarson	3.1	expval = atof(argv[++i]);
58			if (argv[i][0] == '-' \| argv[i][0] == '+')
59			expval = pow(2., expval);
60			} else
61			goto userr;
62			break;
63			case 'x': /* horizontal resolution */
64			if (badarg(argc-i-1,argv+i+1,"i"))
65			goto userr;
66			xres = atoi(argv[++i]);
67			break;
68			case 'y': /* vertical resolution */
69			if (badarg(argc-i-1,argv+i+1,"i"))
70			goto userr;
71			yres = atoi(argv[++i]);
72			break;
73			case 'o': /* output file specificaiton */
74			if (badarg(argc-i-1,argv+i+1,"s"))
75			goto userr;
76			outspec = argv[++i];
77			break;
78	gwlarson	3.5	case 'r': /* random sampling */
79	gwlarson	3.6	if (badarg(argc-i-1,argv+i+1,"f"))
80			goto userr;
81			randfrac = atof(argv[++i]);
82	gwlarson	3.5	break;
83			case 's': /* smooth sampling */
84	gwlarson	3.6	randfrac = -1.;
85	gwlarson	3.5	break;
86	gwlarson	3.1	case 'S': /* sequence start */
87			if (badarg(argc-i-1,argv+i+1,"i"))
88			goto userr;
89			seqstart = atoi(argv[++i]);
90			break;
91			case 'v': /* view file */
92	gwlarson	3.4	if (argv[i][2]!='f' \|\| badarg(argc-i-1,argv+i+1,"s"))
93	gwlarson	3.1	goto userr;
94			rval = viewfile(argv[++i], &myview, NULL);
95			if (rval < 0) {
96			sprintf(errmsg, "cannot open view file \"%s\"",
97			argv[i]);
98			error(SYSTEM, errmsg);
99			} else if (rval == 0) {
100			sprintf(errmsg, "bad view file \"%s\"",
101			argv[i]);
102			error(USER, errmsg);
103			}
104			break;
105			default:
106			goto userr;
107			}
108			}
109			/* open holodeck file */
110	gwlarson	3.3	if (i != argc-1)
111	gwlarson	3.1	goto userr;
112	gwlarson	3.3	hdkfile = argv[i];
113	gwlarson	3.1	initialize();
114			/* render picture(s) */
115			if (seqstart <= 0)
116			dopicture(0);
117			else
118			while (nextview(&myview, stdin) != EOF)
119			dopicture(seqstart++);
120			quit(0); /* all done! */
121			userr:
122			fprintf(stderr,
123	gwlarson	3.6	"Usage: %s [-w][-r rf][-pa pa][-pe ex][-x hr][-y vr][-S stfn][-o outp][view] input.hdk\n",
124	gwlarson	3.1	progname);
125			quit(1);
126			}
127
128
129			dopicture(fn) /* render view from holodeck */
130			int fn;
131			{
132			char *err;
133			int rval;
134			BEAMLIST blist;
135
136			if ((err = setview(&myview)) != NULL) {
137			sprintf(errmsg, "%s -- skipping frame %d", err, fn);
138			error(WARNING, errmsg);
139			return;
140			}
141			startpicture(fn); /* open output picture */
142			/* determine relevant beams */
143			viewbeams(&myview, hres, vres, &blist);
144			/* render image */
145			if (blist.nb > 0) {
146			render_frame(blist.bl, blist.nb);
147			free((char *)blist.bl);
148			} else {
149			sprintf(errmsg, "no section visible in frame %d", fn);
150			error(WARNING, errmsg);
151			}
152			rval = endpicture(); /* write pixel values */
153			if (rval < 0) {
154			sprintf(errmsg, "error writing frame %d", fn);
155			error(SYSTEM, errmsg);
156			}
157	gwlarson	3.3	#ifdef DEBUG
158	gwlarson	3.1	if (blist.nb > 0 & rval > 0) {
159	gwlarson	3.3	sprintf(errmsg, "%d unrendered pixels in frame %d (%.1f%%)",
160			rval, fn, 100.rval/(hresvres));
161	gwlarson	3.1	error(WARNING, errmsg);
162			}
163	gwlarson	3.3	#endif
164	gwlarson	3.1	}
165
166
167			render_frame(bl, nb) /* render frame from beam values */
168			register PACKHEAD *bl;
169			int nb;
170			{
171	gwlarson	3.2	extern int pixBeam();
172	gwlarson	3.1	register HDBEAMI *bil;
173			register int i;
174
175			if (nb <= 0) return;
176			if ((bil = (HDBEAMI )malloc(nbsizeof(HDBEAMI))) == NULL)
177			error(SYSTEM, "out of memory in render_frame");
178			for (i = nb; i--; ) {
179			bil[i].h = hdlist[bl[i].hd];
180			bil[i].b = bl[i].bi;
181			}
182	gwlarson	3.2	hdloadbeams(bil, nb, pixBeam);
183	gwlarson	3.6	pixFinish(randfrac);
184	gwlarson	3.1	free((char *)bil);
185			}
186
187
188			startpicture(fn) /* initialize picture for rendering & output */
189			int fn;
190			{
191			extern char VersionID[];
192			double pa = pixaspect;
193			char fname[256];
194			/* compute picture resolution */
195			hres = xres; vres = yres;
196			normaspect(viewaspect(&myview), &pa, &hres, &vres);
197			/* prepare output */
198			if (outspec != NULL) {
199			sprintf(fname, outspec, fn);
200			if (freopen(fname, "w", stdout) == NULL) {
201			sprintf(errmsg, "cannot open output \"%s\"", fname);
202			error(SYSTEM, errmsg);
203			}
204			}
205			/* write header */
206			newheader("RADIANCE", stdout);
207			printf("SOFTWARE= %s\n", VersionID);
208			printf("%s %s\n", progname, hdkfile);
209			if (fn)
210			printf("FRAME=%d\n", fn);
211			fputs(VIEWSTR, stdout);
212			fprintview(&myview, stdout);
213			fputc('\n', stdout);
214			if (pa < 0.99 \| pa > 1.01)
215			fputaspect(pa, stdout);
216			if (expval < 0.99 \| expval > 1.01)
217			fputexpos(expval, stdout);
218			fputformat(COLRFMT, stdout);
219			fputc('\n', stdout);
220			/* write resolution (standard order) */
221			fprtresolu(hres, vres, stdout);
222			/* prepare image buffers */
223			bzero((char )mypixel, hresvres*sizeof(COLOR));
224			bzero((char )myweight, hresvres*sizeof(float));
225	gwlarson	3.2	bzero((char )mydepth, hresvres*sizeof(float));
226	gwlarson	3.1	}
227
228
229			int
230			endpicture() /* finish and write out pixels */
231			{
232	gwlarson	3.4	int lastr = -1, nunrend = 0;
233			int4 lastp, lastrp;
234			register int4 p;
235	gwlarson	3.1	register double d;
236			/* compute final pixel values */
237			for (p = hres*vres; p--; ) {
238			if (myweight[p] <= FTINY) {
239	gwlarson	3.4	if (lastr >= 0)
240			if (p/hres == lastp/hres)
241			copycolor(mypixel[p], mypixel[lastp]);
242			else
243			copycolor(mypixel[p], mypixel[lastrp]);
244	gwlarson	3.1	nunrend++;
245			continue;
246			}
247			d = expval/myweight[p];
248			scalecolor(mypixel[p], d);
249	gwlarson	3.4	if ((lastp=p)/hres != lastr)
250			lastr = (lastrp=p)/hres;
251	gwlarson	3.1	}
252			/* write each scanline */
253	gwlarson	3.4	for (p = vres; p--; )
254			if (fwritescan(mypixel+p*hres, hres, stdout) < 0)
255	gwlarson	3.1	return(-1);
256			if (fflush(stdout) == EOF)
257			return(-1);
258			return(nunrend);
259			}
260
261
262			initialize() /* initialize holodeck and buffers */
263			{
264			extern long ftell();
265			int fd;
266			FILE *fp;
267			int n;
268			int4 nextloc;
269			/* open holodeck file */
270			if ((fp = fopen(hdkfile, "r")) == NULL) {
271			sprintf(errmsg, "cannot open \"%s\" for reading", hdkfile);
272			error(SYSTEM, errmsg);
273			}
274			/* check header format */
275			checkheader(fp, HOLOFMT, NULL);
276			/* check magic number */
277			if (getw(fp) != HOLOMAGIC) {
278			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
279			hdkfile);
280			error(USER, errmsg);
281			}
282			nextloc = ftell(fp); /* get stdio position */
283			fd = dup(fileno(fp)); /* dup file descriptor */
284			fclose(fp); /* done with stdio */
285			for (n = 0; nextloc > 0L; n++) { /* initialize each section */
286			lseek(fd, (long)nextloc, 0);
287			read(fd, (char *)&nextloc, sizeof(nextloc));
288			hdinit(fd, NULL);
289			}
290			/* allocate picture buffer */
291			mypixel = (COLOR )bmalloc(xresyres*sizeof(COLOR));
292			myweight = (float )bmalloc(xresyres*sizeof(float));
293	gwlarson	3.2	mydepth = (float )bmalloc(xresyres*sizeof(float));
294			if (mypixel == NULL \| myweight == NULL \| mydepth == NULL)
295	gwlarson	3.1	error(SYSTEM, "out of memory in initialize");
296			}
297
298
299			eputs(s) /* put error message to stderr */
300			register char *s;
301			{
302			static int midline = 0;
303
304			if (!*s)
305			return;
306			if (!midline++) { /* prepend line with program name */
307			fputs(progname, stderr);
308			fputs(": ", stderr);
309			}
310			fputs(s, stderr);
311			if (s[strlen(s)-1] == '\n') {
312			fflush(stderr);
313			midline = 0;
314			}
315			}