src/hd/rhpict.c

#ifndef lint
static const char       RCSid[] = "$Id: rhpict.c,v 3.23 2025/06/06 19:11:21 greg Exp $";
#endif
/*
 * Radiance holodeck picture generator
 */

#include <string.h>
#include "platform.h"
#include "rterror.h"
#include "rholo.h"

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? */

static void dopicture(int fn);
static void render_frame(PACKHEAD *bl, int nb);
static void startpicture(int fn);
static int endpicture(void);
static void initialize(void);
 /* from rhpict2.c */
extern void pixFinish(double ransamp);
extern void pixBeam(BEAM *bp, HDBEAMI *hb);


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

        gargc = argc; gargv = argv;
        fixargv0(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);
        return 1;  /* pro forma return */
}


static void
dopicture(                      /* 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
}


static void
render_frame(           /* render frame from beam values */
        PACKHEAD        *bl,
        int     nb
)
{
        HDBEAMI *bil;
        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);
}


static void
startpicture(           /* 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, "wb", 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));
}


static int
endpicture(void)                        /* finish and write out pixels */
{
        int     lastr = -1, nunrend = 0;
        int32   lastp, lastrp;
        int32   p;
        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);
}


static void
initialize(void)                        /* initialize holodeck and buffers */
{
        int     fd;
        FILE    *fp;
        int     n;
        off_t   nextloc;
                                        /* open holodeck file */
        if ((fp = fopen(hdkfile, "rb")) == 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, nextloc, SEEK_SET);
                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(const char *s)            /* put error message to stderr */
{
        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:	3.24
Committed:	Sat Jun 7 05:09:46 2025 UTC (2 hours, 53 minutes ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 3.23:	+1 -2 lines
Log Message:	refactor: Put some declarations into "paths.h" and included in "platform.h"
#	User	Rev	Content
1	gwlarson	3.1	#ifndef lint
2	greg	3.24	static const char RCSid[] = "$Id: rhpict.c,v 3.23 2025/06/06 19:11:21 greg Exp $";
3	gwlarson	3.1	#endif
4			/*
5			* Radiance holodeck picture generator
6			*/
7
8	schorsch	3.11	#include <string.h>
9	greg	3.16	#include "platform.h"
10	schorsch	3.17	#include "rterror.h"
11	gwlarson	3.1	#include "rholo.h"
12
13			char hdkfile; / holodeck file name */
14	gwlarson	3.7	char gargc; /* global argc */
15			char *gargv; / global argv */
16	gwlarson	3.1
17			VIEW myview = STDVIEW; /* current output view */
18			int xres = 512, yres = 512; /* max. horizontal and vertical resolution */
19			char outspec = NULL; / output file specification */
20	gwlarson	3.6	double randfrac = -1.; /* random resampling fraction */
21	gwlarson	3.1	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	schorsch	3.17	static void dopicture(int fn);
33			static void render_frame(PACKHEAD *bl, int nb);
34			static void startpicture(int fn);
35			static int endpicture(void);
36			static void initialize(void);
37			/* from rhpict2.c */
38			extern void pixFinish(double ransamp);
39			extern void pixBeam(BEAM bp, HDBEAMI hb);
40	gwlarson	3.1
41	schorsch	3.17
42			int
43			main(
44			int argc,
45			char *argv[]
46			)
47	gwlarson	3.1	{
48			int i, rval;
49
50	gwlarson	3.7	gargc = argc; gargv = argv;
51	greg	3.23	fixargv0(argv[0]); /* get arguments */
52	gwlarson	3.1	for (i = 1; i < argc && argv[i][0] == '-'; i++) {
53			rval = getviewopt(&myview, argc-i, argv+i);
54			if (rval >= 0) { /* view option */
55			i += rval;
56			continue;
57			}
58			switch (argv[i][1]) {
59			case 'w': /* turn off warnings */
60			nowarn++;
61			break;
62			case 'p': /* pixel aspect/exposure */
63			if (badarg(argc-i-1,argv+i+1,"f"))
64			goto userr;
65	gwlarson	3.3	if (argv[i][2] == 'a')
66	gwlarson	3.1	pixaspect = atof(argv[++i]);
67	gwlarson	3.3	else if (argv[i][2] == 'e') {
68	gwlarson	3.1	expval = atof(argv[++i]);
69	schorsch	3.14	if ((argv[i][0] == '-') \| (argv[i][0] == '+'))
70	gwlarson	3.1	expval = pow(2., expval);
71			} else
72			goto userr;
73			break;
74			case 'x': /* horizontal resolution */
75			if (badarg(argc-i-1,argv+i+1,"i"))
76			goto userr;
77			xres = atoi(argv[++i]);
78			break;
79			case 'y': /* vertical resolution */
80			if (badarg(argc-i-1,argv+i+1,"i"))
81			goto userr;
82			yres = atoi(argv[++i]);
83			break;
84			case 'o': /* output file specificaiton */
85			if (badarg(argc-i-1,argv+i+1,"s"))
86			goto userr;
87			outspec = argv[++i];
88			break;
89	gwlarson	3.5	case 'r': /* random sampling */
90	gwlarson	3.6	if (badarg(argc-i-1,argv+i+1,"f"))
91			goto userr;
92			randfrac = atof(argv[++i]);
93	gwlarson	3.5	break;
94			case 's': /* smooth sampling */
95	gwlarson	3.6	randfrac = -1.;
96	gwlarson	3.5	break;
97	gwlarson	3.1	case 'S': /* sequence start */
98			if (badarg(argc-i-1,argv+i+1,"i"))
99			goto userr;
100			seqstart = atoi(argv[++i]);
101			break;
102			case 'v': /* view file */
103	gwlarson	3.4	if (argv[i][2]!='f' \|\| badarg(argc-i-1,argv+i+1,"s"))
104	gwlarson	3.1	goto userr;
105			rval = viewfile(argv[++i], &myview, NULL);
106			if (rval < 0) {
107			sprintf(errmsg, "cannot open view file \"%s\"",
108			argv[i]);
109			error(SYSTEM, errmsg);
110			} else if (rval == 0) {
111			sprintf(errmsg, "bad view file \"%s\"",
112			argv[i]);
113			error(USER, errmsg);
114			}
115			break;
116			default:
117			goto userr;
118			}
119			}
120			/* open holodeck file */
121	gwlarson	3.3	if (i != argc-1)
122	gwlarson	3.1	goto userr;
123	gwlarson	3.3	hdkfile = argv[i];
124	gwlarson	3.1	initialize();
125			/* render picture(s) */
126			if (seqstart <= 0)
127			dopicture(0);
128			else
129			while (nextview(&myview, stdin) != EOF)
130			dopicture(seqstart++);
131			quit(0); /* all done! */
132			userr:
133			fprintf(stderr,
134	gwlarson	3.6	"Usage: %s [-w][-r rf][-pa pa][-pe ex][-x hr][-y vr][-S stfn][-o outp][view] input.hdk\n",
135	gwlarson	3.1	progname);
136			quit(1);
137	schorsch	3.17	return 1; /* pro forma return */
138	gwlarson	3.1	}
139
140
141	schorsch	3.17	static void
142			dopicture( /* render view from holodeck */
143			int fn
144			)
145	gwlarson	3.1	{
146			char *err;
147			int rval;
148			BEAMLIST blist;
149
150			if ((err = setview(&myview)) != NULL) {
151			sprintf(errmsg, "%s -- skipping frame %d", err, fn);
152			error(WARNING, errmsg);
153			return;
154			}
155			startpicture(fn); /* open output picture */
156			/* determine relevant beams */
157			viewbeams(&myview, hres, vres, &blist);
158			/* render image */
159			if (blist.nb > 0) {
160			render_frame(blist.bl, blist.nb);
161	greg	3.8	free((void *)blist.bl);
162	gwlarson	3.1	} else {
163			sprintf(errmsg, "no section visible in frame %d", fn);
164			error(WARNING, errmsg);
165			}
166			rval = endpicture(); /* write pixel values */
167			if (rval < 0) {
168			sprintf(errmsg, "error writing frame %d", fn);
169			error(SYSTEM, errmsg);
170			}
171	gwlarson	3.3	#ifdef DEBUG
172	gwlarson	3.1	if (blist.nb > 0 & rval > 0) {
173	gwlarson	3.3	sprintf(errmsg, "%d unrendered pixels in frame %d (%.1f%%)",
174			rval, fn, 100.rval/(hresvres));
175	gwlarson	3.1	error(WARNING, errmsg);
176			}
177	gwlarson	3.3	#endif
178	gwlarson	3.1	}
179
180
181	schorsch	3.17	static void
182			render_frame( /* render frame from beam values */
183	greg	3.20	PACKHEAD *bl,
184	schorsch	3.17	int nb
185			)
186	gwlarson	3.1	{
187	greg	3.20	HDBEAMI *bil;
188			int i;
189	gwlarson	3.1
190			if (nb <= 0) return;
191			if ((bil = (HDBEAMI )malloc(nbsizeof(HDBEAMI))) == NULL)
192			error(SYSTEM, "out of memory in render_frame");
193			for (i = nb; i--; ) {
194			bil[i].h = hdlist[bl[i].hd];
195			bil[i].b = bl[i].bi;
196			}
197	gwlarson	3.2	hdloadbeams(bil, nb, pixBeam);
198	gwlarson	3.6	pixFinish(randfrac);
199	greg	3.8	free((void *)bil);
200	gwlarson	3.1	}
201
202
203	schorsch	3.17	static void
204			startpicture( /* initialize picture for rendering & output */
205			int fn
206			)
207	gwlarson	3.1	{
208			extern char VersionID[];
209			double pa = pixaspect;
210			char fname[256];
211			/* compute picture resolution */
212			hres = xres; vres = yres;
213			normaspect(viewaspect(&myview), &pa, &hres, &vres);
214			/* prepare output */
215			if (outspec != NULL) {
216			sprintf(fname, outspec, fn);
217	greg	3.21	if (freopen(fname, "wb", stdout) == NULL) {
218	gwlarson	3.1	sprintf(errmsg, "cannot open output \"%s\"", fname);
219			error(SYSTEM, errmsg);
220			}
221			}
222			/* write header */
223			newheader("RADIANCE", stdout);
224			printf("SOFTWARE= %s\n", VersionID);
225	gwlarson	3.7	printargs(gargc, gargv, stdout);
226	gwlarson	3.1	if (fn)
227			printf("FRAME=%d\n", fn);
228			fputs(VIEWSTR, stdout);
229			fprintview(&myview, stdout);
230			fputc('\n', stdout);
231	schorsch	3.14	if ((pa < 0.99) \| (pa > 1.01))
232	gwlarson	3.1	fputaspect(pa, stdout);
233	schorsch	3.14	if ((expval < 0.99) \| (expval > 1.01))
234	gwlarson	3.1	fputexpos(expval, stdout);
235			fputformat(COLRFMT, stdout);
236			fputc('\n', stdout);
237			/* write resolution (standard order) */
238			fprtresolu(hres, vres, stdout);
239			/* prepare image buffers */
240	schorsch	3.11	memset((char )mypixel, '\0', hresvres*sizeof(COLOR));
241			memset((char )myweight, '\0', hresvres*sizeof(float));
242			memset((char )mydepth, '\0', hresvres*sizeof(float));
243	gwlarson	3.1	}
244
245
246	schorsch	3.17	static int
247			endpicture(void) /* finish and write out pixels */
248	gwlarson	3.1	{
249	gwlarson	3.4	int lastr = -1, nunrend = 0;
250	greg	3.10	int32 lastp, lastrp;
251	greg	3.20	int32 p;
252			double d;
253	gwlarson	3.1	/* compute final pixel values */
254			for (p = hres*vres; p--; ) {
255			if (myweight[p] <= FTINY) {
256	schorsch	3.13	if (lastr >= 0) {
257	gwlarson	3.4	if (p/hres == lastp/hres)
258			copycolor(mypixel[p], mypixel[lastp]);
259			else
260			copycolor(mypixel[p], mypixel[lastrp]);
261	schorsch	3.13	}
262	gwlarson	3.1	nunrend++;
263			continue;
264			}
265			d = expval/myweight[p];
266			scalecolor(mypixel[p], d);
267	gwlarson	3.4	if ((lastp=p)/hres != lastr)
268			lastr = (lastrp=p)/hres;
269	gwlarson	3.1	}
270			/* write each scanline */
271	gwlarson	3.4	for (p = vres; p--; )
272			if (fwritescan(mypixel+p*hres, hres, stdout) < 0)
273	gwlarson	3.1	return(-1);
274			if (fflush(stdout) == EOF)
275			return(-1);
276			return(nunrend);
277			}
278
279
280	schorsch	3.17	static void
281			initialize(void) /* initialize holodeck and buffers */
282	gwlarson	3.1	{
283			int fd;
284			FILE *fp;
285			int n;
286	greg	3.19	off_t nextloc;
287	gwlarson	3.1	/* open holodeck file */
288	greg	3.21	if ((fp = fopen(hdkfile, "rb")) == NULL) {
289	gwlarson	3.1	sprintf(errmsg, "cannot open \"%s\" for reading", hdkfile);
290			error(SYSTEM, errmsg);
291			}
292			/* check header format */
293			checkheader(fp, HOLOFMT, NULL);
294			/* check magic number */
295			if (getw(fp) != HOLOMAGIC) {
296			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
297			hdkfile);
298			error(USER, errmsg);
299			}
300			nextloc = ftell(fp); /* get stdio position */
301			fd = dup(fileno(fp)); /* dup file descriptor */
302			fclose(fp); /* done with stdio */
303			for (n = 0; nextloc > 0L; n++) { /* initialize each section */
304	greg	3.19	lseek(fd, nextloc, SEEK_SET);
305	gwlarson	3.1	read(fd, (char *)&nextloc, sizeof(nextloc));
306			hdinit(fd, NULL);
307			}
308			/* allocate picture buffer */
309			mypixel = (COLOR )bmalloc(xresyres*sizeof(COLOR));
310			myweight = (float )bmalloc(xresyres*sizeof(float));
311	gwlarson	3.2	mydepth = (float )bmalloc(xresyres*sizeof(float));
312	schorsch	3.14	if ((mypixel == NULL) \| (myweight == NULL) \| (mydepth == NULL))
313	gwlarson	3.1	error(SYSTEM, "out of memory in initialize");
314			}
315
316
317	greg	3.8	void
318	greg	3.22	eputs(const char s) / put error message to stderr */
319	gwlarson	3.1	{
320			static int midline = 0;
321
322			if (!*s)
323			return;
324			if (!midline++) { /* prepend line with program name */
325			fputs(progname, stderr);
326			fputs(": ", stderr);
327			}
328			fputs(s, stderr);
329			if (s[strlen(s)-1] == '\n') {
330			fflush(stderr);
331			midline = 0;
332			}
333			}