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  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 '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][1]!='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][-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);
        pixFlush();
        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     nunrend = 0;
        int     v;
        register double d;
        register int    p;
                                /* compute final pixel values */
        for (p = hres*vres; p--; ) {
                if (myweight[p] <= FTINY) {
                        nunrend++;
                        continue;
                }
                d = expval/myweight[p];
                scalecolor(mypixel[p], d);
        }
                                /* write each scanline */
        for (v = vres; v--; )
                if (fwritescan(mypixel+v*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:	3.3
Committed:	Mon Mar 8 14:09:11 1999 UTC (26 years, 8 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 3.2:	+8 -6 lines
Log Message:	finished discontinuity implementation and fixed various bugs
#	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			double pixaspect = 1.; /* pixel aspect ratio */
22			int seqstart = 0; /* sequence start frame */
23			double expval = 1.; /* exposure value */
24
25			COLOR mypixel; / pixels being rendered */
26			float myweight; / weights (used to compute final pixels) */
27	gwlarson	3.2	float mydepth; / depth values (visibility culling) */
28	gwlarson	3.1	int hres, vres; /* current horizontal and vertical res. */
29
30			extern int nowarn; /* turn warnings off? */
31
32
33			main(argc, argv)
34			int argc;
35			char *argv[];
36			{
37			int i, rval;
38
39			progname = argv[0]; /* get arguments */
40			for (i = 1; i < argc && argv[i][0] == '-'; i++) {
41			rval = getviewopt(&myview, argc-i, argv+i);
42			if (rval >= 0) { /* view option */
43			i += rval;
44			continue;
45			}
46			switch (argv[i][1]) {
47			case 'w': /* turn off warnings */
48			nowarn++;
49			break;
50			case 'p': /* pixel aspect/exposure */
51			if (badarg(argc-i-1,argv+i+1,"f"))
52			goto userr;
53	gwlarson	3.3	if (argv[i][2] == 'a')
54	gwlarson	3.1	pixaspect = atof(argv[++i]);
55	gwlarson	3.3	else if (argv[i][2] == 'e') {
56	gwlarson	3.1	expval = atof(argv[++i]);
57			if (argv[i][0] == '-' \| argv[i][0] == '+')
58			expval = pow(2., expval);
59			} else
60			goto userr;
61			break;
62			case 'x': /* horizontal resolution */
63			if (badarg(argc-i-1,argv+i+1,"i"))
64			goto userr;
65			xres = atoi(argv[++i]);
66			break;
67			case 'y': /* vertical resolution */
68			if (badarg(argc-i-1,argv+i+1,"i"))
69			goto userr;
70			yres = atoi(argv[++i]);
71			break;
72			case 'o': /* output file specificaiton */
73			if (badarg(argc-i-1,argv+i+1,"s"))
74			goto userr;
75			outspec = argv[++i];
76			break;
77			case 'S': /* sequence start */
78			if (badarg(argc-i-1,argv+i+1,"i"))
79			goto userr;
80			seqstart = atoi(argv[++i]);
81			break;
82			case 'v': /* view file */
83			if (argv[i][1]!='f' \|\| badarg(argc-i-1,argv+i+1,"s"))
84			goto userr;
85			rval = viewfile(argv[++i], &myview, NULL);
86			if (rval < 0) {
87			sprintf(errmsg, "cannot open view file \"%s\"",
88			argv[i]);
89			error(SYSTEM, errmsg);
90			} else if (rval == 0) {
91			sprintf(errmsg, "bad view file \"%s\"",
92			argv[i]);
93			error(USER, errmsg);
94			}
95			break;
96			default:
97			goto userr;
98			}
99			}
100			/* open holodeck file */
101	gwlarson	3.3	if (i != argc-1)
102	gwlarson	3.1	goto userr;
103	gwlarson	3.3	hdkfile = argv[i];
104	gwlarson	3.1	initialize();
105			/* render picture(s) */
106			if (seqstart <= 0)
107			dopicture(0);
108			else
109			while (nextview(&myview, stdin) != EOF)
110			dopicture(seqstart++);
111			quit(0); /* all done! */
112			userr:
113			fprintf(stderr,
114			"Usage: %s [-w][-pa pa][-pe ex][-x hr][-y vr][-S stfn][-o outp][view] input.hdk\n",
115			progname);
116			quit(1);
117			}
118
119
120			dopicture(fn) /* render view from holodeck */
121			int fn;
122			{
123			char *err;
124			int rval;
125			BEAMLIST blist;
126
127			if ((err = setview(&myview)) != NULL) {
128			sprintf(errmsg, "%s -- skipping frame %d", err, fn);
129			error(WARNING, errmsg);
130			return;
131			}
132			startpicture(fn); /* open output picture */
133			/* determine relevant beams */
134			viewbeams(&myview, hres, vres, &blist);
135			/* render image */
136			if (blist.nb > 0) {
137			render_frame(blist.bl, blist.nb);
138			free((char *)blist.bl);
139			} else {
140			sprintf(errmsg, "no section visible in frame %d", fn);
141			error(WARNING, errmsg);
142			}
143			rval = endpicture(); /* write pixel values */
144			if (rval < 0) {
145			sprintf(errmsg, "error writing frame %d", fn);
146			error(SYSTEM, errmsg);
147			}
148	gwlarson	3.3	#ifdef DEBUG
149	gwlarson	3.1	if (blist.nb > 0 & rval > 0) {
150	gwlarson	3.3	sprintf(errmsg, "%d unrendered pixels in frame %d (%.1f%%)",
151			rval, fn, 100.rval/(hresvres));
152	gwlarson	3.1	error(WARNING, errmsg);
153			}
154	gwlarson	3.3	#endif
155	gwlarson	3.1	}
156
157
158			render_frame(bl, nb) /* render frame from beam values */
159			register PACKHEAD *bl;
160			int nb;
161			{
162	gwlarson	3.2	extern int pixBeam();
163	gwlarson	3.1	register HDBEAMI *bil;
164			register int i;
165
166			if (nb <= 0) return;
167			if ((bil = (HDBEAMI )malloc(nbsizeof(HDBEAMI))) == NULL)
168			error(SYSTEM, "out of memory in render_frame");
169			for (i = nb; i--; ) {
170			bil[i].h = hdlist[bl[i].hd];
171			bil[i].b = bl[i].bi;
172			}
173	gwlarson	3.2	hdloadbeams(bil, nb, pixBeam);
174			pixFlush();
175	gwlarson	3.1	free((char *)bil);
176			}
177
178
179			startpicture(fn) /* initialize picture for rendering & output */
180			int fn;
181			{
182			extern char VersionID[];
183			double pa = pixaspect;
184			char fname[256];
185			/* compute picture resolution */
186			hres = xres; vres = yres;
187			normaspect(viewaspect(&myview), &pa, &hres, &vres);
188			/* prepare output */
189			if (outspec != NULL) {
190			sprintf(fname, outspec, fn);
191			if (freopen(fname, "w", stdout) == NULL) {
192			sprintf(errmsg, "cannot open output \"%s\"", fname);
193			error(SYSTEM, errmsg);
194			}
195			}
196			/* write header */
197			newheader("RADIANCE", stdout);
198			printf("SOFTWARE= %s\n", VersionID);
199			printf("%s %s\n", progname, hdkfile);
200			if (fn)
201			printf("FRAME=%d\n", fn);
202			fputs(VIEWSTR, stdout);
203			fprintview(&myview, stdout);
204			fputc('\n', stdout);
205			if (pa < 0.99 \| pa > 1.01)
206			fputaspect(pa, stdout);
207			if (expval < 0.99 \| expval > 1.01)
208			fputexpos(expval, stdout);
209			fputformat(COLRFMT, stdout);
210			fputc('\n', stdout);
211			/* write resolution (standard order) */
212			fprtresolu(hres, vres, stdout);
213			/* prepare image buffers */
214			bzero((char )mypixel, hresvres*sizeof(COLOR));
215			bzero((char )myweight, hresvres*sizeof(float));
216	gwlarson	3.2	bzero((char )mydepth, hresvres*sizeof(float));
217	gwlarson	3.1	}
218
219
220			int
221			endpicture() /* finish and write out pixels */
222			{
223			int nunrend = 0;
224			int v;
225			register double d;
226			register int p;
227			/* compute final pixel values */
228			for (p = hres*vres; p--; ) {
229			if (myweight[p] <= FTINY) {
230			nunrend++;
231			continue;
232			}
233			d = expval/myweight[p];
234			scalecolor(mypixel[p], d);
235			}
236			/* write each scanline */
237			for (v = vres; v--; )
238			if (fwritescan(mypixel+v*hres, hres, stdout) < 0)
239			return(-1);
240			if (fflush(stdout) == EOF)
241			return(-1);
242			return(nunrend);
243			}
244
245
246			initialize() /* initialize holodeck and buffers */
247			{
248			extern long ftell();
249			int fd;
250			FILE *fp;
251			int n;
252			int4 nextloc;
253			/* open holodeck file */
254			if ((fp = fopen(hdkfile, "r")) == NULL) {
255			sprintf(errmsg, "cannot open \"%s\" for reading", hdkfile);
256			error(SYSTEM, errmsg);
257			}
258			/* check header format */
259			checkheader(fp, HOLOFMT, NULL);
260			/* check magic number */
261			if (getw(fp) != HOLOMAGIC) {
262			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
263			hdkfile);
264			error(USER, errmsg);
265			}
266			nextloc = ftell(fp); /* get stdio position */
267			fd = dup(fileno(fp)); /* dup file descriptor */
268			fclose(fp); /* done with stdio */
269			for (n = 0; nextloc > 0L; n++) { /* initialize each section */
270			lseek(fd, (long)nextloc, 0);
271			read(fd, (char *)&nextloc, sizeof(nextloc));
272			hdinit(fd, NULL);
273			}
274			/* allocate picture buffer */
275			mypixel = (COLOR )bmalloc(xresyres*sizeof(COLOR));
276			myweight = (float )bmalloc(xresyres*sizeof(float));
277	gwlarson	3.2	mydepth = (float )bmalloc(xresyres*sizeof(float));
278			if (mypixel == NULL \| myweight == NULL \| mydepth == NULL)
279	gwlarson	3.1	error(SYSTEM, "out of memory in initialize");
280			}
281
282
283			eputs(s) /* put error message to stderr */
284			register char *s;
285			{
286			static int midline = 0;
287
288			if (!*s)
289			return;
290			if (!midline++) { /* prepend line with program name */
291			fputs(progname, stderr);
292			fputs(": ", stderr);
293			}
294			fputs(s, stderr);
295			if (s[strlen(s)-1] == '\n') {
296			fflush(stderr);
297			midline = 0;
298			}
299			}