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root/radiance/ray/src/util/wrapBSDF.c
Revision: 2.7
Committed: Mon Feb 16 19:11:28 2015 UTC (7 years, 9 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.6: +35 -25 lines
Log Message:
Added -c option to correct solid angle factor and other fixes

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.7 static const char RCSid[] = "$Id: wrapBSDF.c,v 2.6 2015/02/15 17:23:06 greg Exp $";
3 greg 2.1 #endif
4     /*
5 greg 2.2 * Wrap BSDF data in valid WINDOW XML file
6 greg 2.1 *
7 greg 2.2 * G. Ward February 2015
8 greg 2.1 */
9    
10     #include <ctype.h>
11     #include "rtio.h"
12     #include "rtprocess.h"
13     #include "ezxml.h"
14     #include "bsdf.h"
15     #include "bsdf_m.h"
16     /* XML template file names */
17     const char def_template[] = "minimalBSDFt.xml";
18 greg 2.3 const char win6_template[] = "WINDOW6BSDFt.xml";
19 greg 2.1
20     const char stdin_name[] = "<stdin>";
21     /* input files (can be stdin_name) */
22     const char *xml_input = NULL;
23     /* unit for materials & geometry */
24 greg 2.2 const char *attr_unit = "meter";
25 greg 2.1 const char legal_units[] = "meter|foot|inch|centimeter|millimeter";
26     /* system materials & geometry */
27     const char *mgf_geometry = NULL;
28    
29 greg 2.6 /* angle bases */
30 greg 2.1 enum { ABdefault=-1, ABklemsFull=0, ABklemsHalf, ABklemsQuarter,
31     ABtensorTree3, ABtensorTree4, ABend };
32    
33     int angle_basis = ABdefault;
34    
35 greg 2.7 int correct_solid_angle = 0;
36    
37     const char *klems_basis_name[] = {
38     "LBNL/Klems Full",
39     "LBNL/Klems Half",
40     "LBNL/Klems Quarter",
41     };
42 greg 2.1 /* field IDs and nicknames */
43     struct s_fieldID {
44     char nickName[4];
45 greg 2.3 short has_unit;
46     short win_need;
47 greg 2.1 const char *fullName;
48     } XMLfieldID[] = {
49 greg 2.3 {"m", 0, 1, "Manufacturer"},
50     {"n", 0, 1, "Name"},
51     {"c", 0, 0, "ThermalConductivity"},
52     {"ef", 0, 0, "EmissivityFront"},
53     {"eb", 0, 0, "EmissivityBack"},
54     {"tir", 0, 0, "TIR"},
55     {"eo", 0, 0, "EffectiveOpennessFraction"},
56     {"t", 1, 1, "Thickness"},
57     {"h", 1, 0, "Height"},
58     {"w", 1, 0, "Width"},
59     {"\0", 0, 0, NULL} /* terminator */
60 greg 2.1 };
61     /* field assignments */
62     #define MAXASSIGN 12
63     const char *field_assignment[MAXASSIGN];
64     int nfield_assign = 0;
65     #define FASEP ';'
66     /* data file(s) & spectra */
67     enum { DTtransForward, DTtransBackward, DTreflForward, DTreflBackward };
68    
69     enum { DSsolar=-1, DSnir=-2, DSxbar31=-3, DSvisible=-4, DSzbar31=-5 };
70    
71     #define MAXFILES 20
72    
73     struct s_dfile {
74     const char *fname; /* input data file name */
75     short type; /* BSDF data type */
76     short spectrum; /* BSDF sensor spectrum */
77     } data_file[MAXFILES];
78    
79     int ndataf = 0; /* number of data files */
80    
81     const char *spectr_file[MAXFILES]; /* custom spectral curve input */
82    
83     const char top_level_name[] = "WindowElement";
84    
85 greg 2.3 static char basis_definition[][256] = {
86 greg 2.1
87 greg 2.4 "\t<DataDefinition>\n"
88 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
89     "\t\t<AngleBasis>\n"
90     "\t\t\t<AngleBasisName>LBNL/Klems Full</AngleBasisName>\n"
91 greg 2.4 "\t\t\t</AngleBasis>\n"
92     "\t</DataDefinition>\n",
93 greg 2.1
94 greg 2.4 "\t<DataDefinition>\n"
95 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
96     "\t\t<AngleBasis>\n"
97     "\t\t\t<AngleBasisName>LBNL/Klems Half</AngleBasisName>\n"
98 greg 2.4 "\t\t\t</AngleBasis>\n"
99     "\t</DataDefinition>\n",
100 greg 2.1
101 greg 2.4 "\t<DataDefinition>\n"
102 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
103     "\t\t<AngleBasis>\n"
104     "\t\t\t<AngleBasisName>LBNL/Klems Quarter</AngleBasisName>\n"
105 greg 2.4 "\t\t\t</AngleBasis>\n"
106     "\t</DataDefinition>\n",
107 greg 2.1
108 greg 2.4 "\t<DataDefinition>\n"
109     "\t\t<IncidentDataStructure>TensorTree3</IncidentDataStructure>\n"
110     "\t</DataDefinition>\n",
111    
112     "\t<DataDefinition>\n"
113     "\t\t<IncidentDataStructure>TensorTree4</IncidentDataStructure>\n"
114     "\t</DataDefinition>\n",
115 greg 2.1 };
116    
117     /* Copy data from file descriptor to stdout and close */
118     static int
119     copy_and_close(int fd)
120     {
121     int ok = 1;
122     char buf[8192];
123     int n;
124    
125     if (fd < 0)
126     return 0;
127     while ((n = read(fd, buf, sizeof(buf))) > 0)
128     if (write(fileno(stdout), buf, n) != n) {
129     ok = 0;
130     break;
131     }
132     ok &= (n == 0);
133     close(fd);
134     return ok;
135     }
136    
137     /* Allocate and assign string from file or stream */
138     static char *
139     input2str(const char *inpspec)
140     {
141     FILE *fp = NULL;
142     char *str;
143     int len, pos, n;
144    
145     if (inpspec == NULL || !*inpspec)
146     return "";
147     if (inpspec == stdin_name) { /* read from stdin */
148     fp = stdin;
149 greg 2.2 } else if (inpspec[0] == '!') { /* read from command */
150 greg 2.1 fp = popen(inpspec+1, "r");
151     if (fp == NULL) {
152     fprintf(stderr, "Cannot start process '%s'\n",
153 greg 2.2 inpspec);
154 greg 2.1 return "";
155     }
156     } else { /* else load file */
157     int fd = open(inpspec, O_RDONLY);
158     if (fd < 0) {
159     fprintf(stderr, "%s: cannot open\n", inpspec);
160     return "";
161     }
162     len = lseek(fd, 0L, SEEK_END);
163 greg 2.3 if (len > 0) {
164     lseek(fd, 0L, SEEK_SET);
165     str = (char *)malloc(len+1);
166     if (str == NULL) {
167     close(fd);
168     goto memerr;
169     }
170     if (read(fd, str, len) != len) {
171     fprintf(stderr, "%s: read error\n", inpspec);
172     free(str);
173     close(fd);
174     return "";
175     }
176     str[len] = '\0';
177 greg 2.1 close(fd);
178 greg 2.3 return str;
179 greg 2.1 }
180 greg 2.3 fp = fdopen(fd, "r"); /* not a regular file */
181 greg 2.1 }
182     /* reading from stream */
183     str = (char *)malloc((len=8192)+1);
184     if (str == NULL)
185     goto memerr;
186     pos = 0;
187     while ((n = read(fileno(fp), str+pos, len-pos)) > 0)
188     if ((pos += n) >= len) { /* need more space? */
189     str = (char *)realloc(str, (len += len>>2) + 1);
190     if (str == NULL)
191     goto memerr;
192     }
193     if (n < 0) {
194     fprintf(stderr, "%s: read error\n", inpspec);
195     free(str);
196     str = "";
197     } else { /* tidy up result */
198     str[pos] = '\0';
199     str = (char *)realloc(str, (len=pos)+1);
200     if (str == NULL)
201     goto memerr;
202     }
203 greg 2.2 if (inpspec[0] != '!')
204 greg 2.1 fclose(fp);
205     else if (pclose(fp))
206 greg 2.2 fprintf(stderr, "Error running command '%s'\n", inpspec);
207 greg 2.1 return str;
208     memerr:
209     fprintf(stderr, "%s: error allocating memory\n", inpspec);
210     if (fp != NULL)
211 greg 2.2 (inpspec[0] == '!') ? pclose(fp) : fclose(fp);
212 greg 2.1 return "";
213     }
214    
215     /* Make material assignments in field_assignment to XML fields */
216     static int
217     mat_assignments(const char *caller, const char *fn, ezxml_t wtl)
218     {
219     int i;
220    
221     wtl = ezxml_child(wtl, "Material");
222     if (wtl == NULL) {
223     fprintf(stderr, "%s: missing <Material> tag\n", fn);
224     return 0;
225     }
226     for (i = 0; i < nfield_assign; i++) {
227     const char *fnext = field_assignment[i];
228     for ( ; ; ) {
229 greg 2.5 int added = 0;
230 greg 2.1 ezxml_t fld;
231     char sbuf[512];
232     int j;
233    
234     while (isspace(*fnext))
235     ++fnext;
236     if (!*fnext)
237     break;
238 greg 2.3 for (j = 0; *fnext != '=' && !isspace(*fnext); ) {
239 greg 2.1 if (!*fnext | (*fnext == FASEP) |
240     (j >= sizeof(sbuf)-1)) {
241     fprintf(stderr,
242     "%s: bad tag name in assignment '%s'\n",
243     caller, field_assignment[i]);
244     return 0;
245     }
246     sbuf[j++] = *fnext++;
247     }
248 greg 2.2 sbuf[j] = '\0'; /* check known field */
249 greg 2.1 for (j = 0; XMLfieldID[j].nickName[0]; j++)
250 greg 2.2 if (!strcasecmp(sbuf, XMLfieldID[j].nickName) ||
251     !strcasecmp(sbuf, XMLfieldID[j].fullName)) {
252 greg 2.1 strcpy(sbuf, XMLfieldID[j].fullName);
253     break;
254     }
255     /* check if tag exists */
256     fld = ezxml_child(wtl, sbuf);
257     if (fld == NULL) { /* otherwise, create one */
258 greg 2.3 if (!XMLfieldID[j].nickName[0])
259     fprintf(stderr,
260     "%s: warning - adding tag <%s>\n",
261     fn, sbuf);
262 greg 2.5 ezxml_add_txt(wtl, "\t");
263 greg 2.1 fld = ezxml_add_child_d(wtl, sbuf, strlen(wtl->txt));
264 greg 2.5 ++added;
265 greg 2.1 }
266     if (XMLfieldID[j].has_unit)
267     ezxml_set_attr(fld, "unit", attr_unit);
268 greg 2.3 XMLfieldID[j].win_need = 0;
269 greg 2.1 while (isspace(*fnext))
270     ++fnext;
271     if (*fnext++ != '=') {
272     fprintf(stderr,
273     "%s: missing '=' in assignment '%s'\n",
274     caller, field_assignment[i]);
275     return 0;
276     }
277 greg 2.3 for (j = 0; *fnext && *fnext != FASEP; ) {
278 greg 2.1 if (j >= sizeof(sbuf)-1) {
279     fprintf(stderr,
280     "%s: field too long in '%s'\n",
281     caller, field_assignment[i]);
282     return 0;
283     }
284     sbuf[j++] = *fnext++;
285     }
286     sbuf[j] = '\0';
287     ezxml_set_txt_d(fld, sbuf);
288 greg 2.5 if (added)
289     ezxml_add_txt(wtl, "\n\t");
290 greg 2.1 fnext += (*fnext == FASEP);
291     }
292     }
293 greg 2.3 /* check required WINDOW settings */
294     if (xml_input == win6_template)
295     for (i = 0; XMLfieldID[i].nickName[0]; i++)
296     if (XMLfieldID[i].win_need &&
297     !ezxml_txt(ezxml_child(wtl,XMLfieldID[i].fullName))[0]) {
298     fprintf(stderr,
299     "%s: missing required '%s' assignment for WINDOW <%s>\n",
300     caller, XMLfieldID[i].nickName,
301     XMLfieldID[i].fullName);
302     return 0;
303     }
304 greg 2.1 return 1; /* no errors */
305     }
306    
307     /* Complete angle basis specification */
308     static int
309     finish_angle_basis(ezxml_t ab)
310     {
311     const char *bn = ezxml_txt(ezxml_child(ab, "AngleBasisName"));
312     int i, n = nabases;
313     char buf[32];
314    
315     if (!*bn) {
316     fputs("Internal error - missing <AngleBasisName>!\n", stderr);
317     return 0;
318     }
319     while (n-- > 0)
320     if (!strcasecmp(bn, abase_list[n].name))
321     break;
322     if (n < 0) {
323     fprintf(stderr, "Internal error - unknown angle basis '%s'", bn);
324     return 0;
325     }
326     for (i = 0; abase_list[n].lat[i].nphis; i++) {
327     ezxml_t tb, abb = ezxml_add_child(ab, "AngleBasisBlock",
328     strlen(ab->txt));
329     sprintf(buf, "%g", i ?
330     .5*(abase_list[n].lat[i].tmin + abase_list[n].lat[i+1].tmin) :
331     .0);
332 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
333 greg 2.1 ezxml_set_txt_d(ezxml_add_child(abb,"Theta",strlen(abb->txt)), buf);
334     sprintf(buf, "%d", abase_list[n].lat[i].nphis);
335 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
336 greg 2.1 ezxml_set_txt_d(ezxml_add_child(abb,"nPhis",strlen(abb->txt)), buf);
337 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
338 greg 2.1 tb = ezxml_add_child(abb, "ThetaBounds", strlen(abb->txt));
339 greg 2.4 ezxml_add_txt(tb, "\n\t\t\t\t\t");
340 greg 2.1 sprintf(buf, "%g", abase_list[n].lat[i].tmin);
341 greg 2.4 ezxml_set_txt_d(ezxml_add_child(tb,"LowerTheta",strlen(tb->txt)), buf);
342     ezxml_add_txt(tb, "\n\t\t\t\t\t");
343 greg 2.1 sprintf(buf, "%g", abase_list[n].lat[i+1].tmin);
344 greg 2.4 ezxml_set_txt_d(ezxml_add_child(tb,"UpperTheta",strlen(tb->txt)), buf);
345     ezxml_add_txt(tb, "\n\t\t\t\t");
346     ezxml_add_txt(abb, "\n\t\t\t");
347     ezxml_add_txt(ab, "\n\t\t\t");
348 greg 2.1 }
349     return 1;
350     }
351    
352     /* Determine our angle basis from current tags */
353     static int
354     determine_angle_basis(const char *fn, ezxml_t wtl)
355     {
356     const char *ids;
357     int i;
358    
359     wtl = ezxml_child(wtl, "DataDefinition");
360     if (wtl == NULL)
361     return -1;
362     ids = ezxml_txt(ezxml_child(wtl, "IncidentDataStructure"));
363 greg 2.4 if (!ids[0])
364 greg 2.1 return -1;
365     for (i = 0; i < ABend; i++) {
366     ezxml_t parsed = ezxml_parse_str(basis_definition[i],
367     strlen(basis_definition[i]));
368     int match = 0;
369     if (!strcmp(ids, ezxml_txt(ezxml_child(parsed,
370     "IncidentDataStructure")))) {
371     const char *abn0 = ezxml_txt(
372     ezxml_child(ezxml_child(wtl,
373     "AngleBasis"), "AngleBasisName"));
374     const char *abn1 = ezxml_txt(
375     ezxml_child(ezxml_child(parsed,
376     "AngleBasis"), "AngleBasisName"));
377     match = !strcmp(abn0, abn1);
378     }
379     ezxml_free(parsed);
380     if (match)
381     return i;
382     }
383     return -1;
384     }
385    
386 greg 2.7 /* Filter Klems angle basis, factoring out incident projected solid angle */
387 greg 2.6 static int
388     filter_klems_matrix(FILE *fp)
389     {
390     #define MAX_COLUMNS 145
391 greg 2.7 const char *bn = klems_basis_name[angle_basis];
392 greg 2.6 float col_corr[MAX_COLUMNS];
393     int i, j, n = nabases;
394     /* get angle basis */
395     while (n-- > 0)
396     if (!strcasecmp(bn, abase_list[n].name))
397     break;
398     if (n < 0)
399     return 0;
400     if (abase_list[n].nangles > MAX_COLUMNS) {
401 greg 2.7 fputs("Internal error - too many Klems columns!\n", stderr);
402 greg 2.6 return 0;
403     }
404     /* get correction factors */
405     for (j = abase_list[n].nangles; j--; )
406     col_corr[j] = 1.f / io_getohm(j, &abase_list[n]);
407     /* read/correct/write matrix */
408     for (i = 0; i < abase_list[n].nangles; i++) {
409     for (j = 0; j < abase_list[n].nangles; j++) {
410     double d;
411     if (fscanf(fp, "%lf", &d) != 1)
412     return 0;
413 greg 2.7 if (d < -1e-3) {
414     fputs("Negative BSDF data!\n", stderr);
415     return 0;
416     }
417     printf(" %.3e", d*col_corr[j]*(d > 0));
418 greg 2.6 }
419     fputc('\n', stdout);
420     }
421 greg 2.7 while ((i = getc(fp)) != EOF)
422     if (!isspace(i)) {
423     fputs("Unexpected data past EOF\n", stderr);
424     return 0;
425     }
426     return 1; /* all is good */
427 greg 2.6 #undef MAX_COLUMNS
428     }
429    
430 greg 2.1 /* Write out BSDF data block with surrounding tags */
431     static int
432     writeBSDFblock(const char *caller, struct s_dfile *df)
433     {
434 greg 2.7 int correct_klems = correct_solid_angle;
435 greg 2.1 char *cp;
436    
437     puts("\t<WavelengthData>");
438     puts("\t\t<LayerNumber>System</LayerNumber>");
439     switch (df->spectrum) {
440     case DSvisible:
441     puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
442 greg 2.7 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
443 greg 2.1 puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
444     break;
445     case DSxbar31:
446     puts("\t\t<Wavelength unit=\"Integral\">CIE-X</Wavelength>");
447     puts("\t\tSourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
448     puts("\t\t<DetectorSpectrum>ASTM E308 1931 X.dsp</DetectorSpectrum>");
449     break;
450     case DSzbar31:
451     puts("\t\t<Wavelength unit=\"Integral\">CIE-Z</Wavelength>");
452     puts("\t\tSourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
453     puts("\t\t<DetectorSpectrum>ASTM E308 1931 Z.dsp</DetectorSpectrum>");
454     break;
455     case DSsolar:
456     puts("\t\t<Wavelength unit=\"Integral\">Solar</Wavelength>");
457     puts("\t\tSourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
458     puts("\t\t<DetectorSpectrum>None</DetectorSpectrum>");
459     break;
460     case DSnir:
461     puts("\t\t<Wavelength unit=\"Integral\">NIR</Wavelength>");
462     puts("\t\tSourceSpectrum>PLACE_HOLDER</SourceSpectrum>");
463     puts("\t\t<DetectorSpectrum>PLACE_HOLDER</DetectorSpectrum>");
464     break;
465     default:
466     cp = strrchr(spectr_file[df->spectrum], '.');
467     if (cp != NULL)
468     *cp = '\0';
469     printf("\t\t<Wavelength unit=\"Integral\">%s</Wavelength>\n",
470     spectr_file[df->spectrum]);
471     if (cp != NULL)
472     *cp = '.';
473     puts("\t\tSourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
474     printf("\t\t<DetectorSpectrum>%s</DetectorSpectrum>\n",
475     spectr_file[df->spectrum]);
476     break;
477     }
478     puts("\t\t<WavelengthDataBlock>");
479     fputs("\t\t\t<WavelengthDataDirection>", stdout);
480     switch (df->type) {
481     case DTtransForward:
482     fputs("Transmission Front", stdout);
483     break;
484     case DTtransBackward:
485     fputs("Transmission Back", stdout);
486     break;
487     case DTreflForward:
488     fputs("Reflection Front", stdout);
489     break;
490     case DTreflBackward:
491     fputs("Reflection Back", stdout);
492     break;
493     default:
494     fprintf(stderr, "%s: internal - bad BSDF type (%d)\n", caller, df->type);
495     return 0;
496     }
497     puts("</WavelengthDataDirection>");
498     switch (angle_basis) {
499     case ABklemsFull:
500     case ABklemsHalf:
501     case ABklemsQuarter:
502 greg 2.7 fputs("\t\t\t<ColumnAngleBasis>", stdout);
503     fputs(klems_basis_name[angle_basis], stdout);
504     puts("</ColumnAngleBasis>");
505     fputs("\t\t\t<RowAngleBasis>", stdout);
506     fputs(klems_basis_name[angle_basis], stdout);
507     puts("</RowAngleBasis>");
508 greg 2.1 break;
509     case ABtensorTree3:
510     case ABtensorTree4:
511     puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
512 greg 2.7 correct_klems = 0;
513 greg 2.1 break;
514     default:
515     fprintf(stderr, "%s: bad angle basis (%d)\n", caller, angle_basis);
516     return 0;
517     }
518     puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
519     puts("\t\t\t<ScatteringData>");
520     fflush(stdout);
521 greg 2.7 if (correct_klems) { /* correct Klems matrix data */
522 greg 2.6 FILE *fp = stdin;
523     if (df->fname[0] == '!')
524     fp = popen(df->fname+1, "r");
525     else if (df->fname != stdin_name)
526     fp = fopen(df->fname, "r");
527     if (fp == NULL) {
528     fprintf(stderr, "%s: cannot open '%s'\n",
529     caller, df->fname);
530     return 0;
531     }
532     if (!filter_klems_matrix(fp)) {
533     fprintf(stderr, "%s: Klems data error from '%s'\n",
534     caller, df->fname);
535     return 0;
536     }
537     if (df->fname[0] != '!') {
538     fclose(fp);
539     } else if (pclose(fp)) {
540     fprintf(stderr, "%s: error running '%s'\n",
541     caller, df->fname);
542     return 0;
543     }
544     } else if (df->fname == stdin_name) {
545 greg 2.1 copy_and_close(fileno(stdin));
546 greg 2.2 } else if (df->fname[0] != '!') {
547 greg 2.1 if (!copy_and_close(open(df->fname, O_RDONLY))) {
548     fprintf(stderr, "%s: error reading from '%s'\n",
549     caller, df->fname);
550     return 0;
551     }
552     } else if (system(df->fname+1)) {
553 greg 2.2 fprintf(stderr, "%s: error running '%s'\n", caller, df->fname);
554 greg 2.1 return 0;
555     }
556     puts("\t\t\t</ScatteringData>");
557     puts("\t\t</WavelengthDataBlock>");
558     puts("\t</WavelengthData>");
559     return 1;
560     }
561    
562     /* Write out XML, interpolating BSDF data block(s) */
563     static int
564     writeBSDF(const char *caller, ezxml_t fl)
565     {
566 greg 2.2 char *xml = ezxml_toxml(fl); /* store XML in string */
567 greg 2.1 int ei, i;
568     /* locate trailer */
569     for (ei = strlen(xml)-strlen("</Layer></Optical></WindowElement>");
570     ei >= 0; ei--)
571     if (!strncmp(xml+ei, "</Layer>", 8))
572     break;
573     if (ei < 0) {
574     fprintf(stderr, "%s: internal - cannot find trailer\n",
575     caller);
576     free(xml);
577     return 0;
578     }
579     fflush(stdout); /* write previous XML info. */
580     if (write(fileno(stdout), xml, ei) != ei) {
581     free(xml);
582     return 0;
583     }
584     for (i = 0; i < ndataf; i++) /* interpolate new data */
585     if (!writeBSDFblock(caller, &data_file[i])) {
586     free(xml);
587     return 0;
588     }
589     fputs(xml+ei, stdout); /* write trailer */
590 greg 2.2 free(xml); /* free string */
591 greg 2.4 fputc('\n', stdout);
592 greg 2.1 return (fflush(stdout) == 0);
593     }
594    
595     /* Insert BSDF data into XML wrapper */
596     static int
597     wrapBSDF(const char *caller)
598     {
599 greg 2.2 const char *xml_path = xml_input;
600 greg 2.1 ezxml_t fl, wtl;
601     /* load previous XML/template */
602 greg 2.2 if (xml_input == stdin_name) {
603     fl = ezxml_parse_fp(stdin);
604     } else if (xml_input[0] == '!') {
605     FILE *pfp = popen(xml_input+1, "r");
606     if (pfp == NULL) {
607     fprintf(stderr, "%s: cannot start process '%s'\n",
608     caller, xml_input);
609     return 0;
610     }
611     fl = ezxml_parse_fp(pfp);
612     if (pclose(pfp)) {
613     fprintf(stderr, "%s: error running '%s'\n",
614     caller, xml_input);
615     return 0;
616     }
617     } else {
618     xml_path = getpath((char *)xml_input, getrlibpath(), R_OK);
619     if (xml_path == NULL) {
620     fprintf(stderr, "%s: cannot find XML file named '%s'\n",
621     caller, xml_input==NULL ? "NULL" : xml_input);
622     return 0;
623     }
624     fl = ezxml_parse_file(xml_path);
625 greg 2.1 }
626     if (fl == NULL) {
627 greg 2.2 fprintf(stderr, "%s: cannot load XML '%s'\n", caller, xml_path);
628 greg 2.1 return 0;
629     }
630     if (ezxml_error(fl)[0]) {
631 greg 2.2 fprintf(stderr, "%s: error in XML '%s': %s\n", caller, xml_path,
632 greg 2.1 ezxml_error(fl));
633     goto failure;
634     }
635     if (strcmp(ezxml_name(fl), top_level_name)) {
636     fprintf(stderr, "%s: top level in XML '%s' not '%s'\n",
637     caller, xml_path, top_level_name);
638     goto failure;
639     }
640     wtl = ezxml_child(fl, "FileType");
641     if (wtl != NULL && strcmp(ezxml_txt(wtl), "BSDF")) {
642     fprintf(stderr, "%s: wrong FileType in XML '%s' (must be 'BSDF')",
643     caller, xml_path);
644     goto failure;
645     }
646     wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer");
647     if (wtl == NULL) {
648     fprintf(stderr, "%s: no optical layers in XML '%s'",
649     caller, xml_path);
650     goto failure;
651     }
652     /* make material assignments */
653 greg 2.3 if (!mat_assignments(caller, xml_path, wtl))
654 greg 2.1 goto failure;
655     if (mgf_geometry != NULL) { /* add geometry if specified */
656     ezxml_t geom = ezxml_child(wtl, "Geometry");
657     if (geom == NULL)
658 greg 2.3 geom = ezxml_add_child(wtl, "Geometry", strlen(wtl->txt));
659 greg 2.1 ezxml_set_attr(geom, "format", "MGF");
660     geom = ezxml_child(geom, "MGFblock");
661     if (geom == NULL) {
662     geom = ezxml_child(wtl, "Geometry");
663 greg 2.3 geom = ezxml_add_child(geom, "MGFblock", 0);
664 greg 2.1 }
665     ezxml_set_attr(geom, "unit", attr_unit);
666     ezxml_set_txt(geom, input2str(mgf_geometry));
667     if (geom->txt[0])
668     ezxml_set_flag(geom, EZXML_TXTM);
669     }
670     /* check basis */
671     if (angle_basis != ABdefault) {
672 greg 2.4 size_t offset = 0;
673 greg 2.1 ezxml_t ab, dd = ezxml_child(wtl, "DataDefinition");
674 greg 2.4 if (dd != NULL) {
675     offset = dd->off;
676 greg 2.5 if (dd->child != NULL)
677     fprintf(stderr,
678 greg 2.1 "%s: warning - replacing existing <DataDefinition> in '%s'\n",
679     caller, xml_path);
680 greg 2.4 ezxml_remove(dd);
681     } else
682     offset = strlen(wtl->txt);
683     dd = ezxml_insert(ezxml_parse_str(basis_definition[angle_basis],
684 greg 2.1 strlen(basis_definition[angle_basis])),
685 greg 2.4 wtl, offset);
686 greg 2.1 if ((ab = ezxml_child(dd, "AngleBasis")) != NULL &&
687     !finish_angle_basis(ab))
688     goto failure;
689     } else if ((angle_basis = determine_angle_basis(xml_path, wtl)) < 0) {
690     fprintf(stderr, "%s: need -a option to set angle basis\n",
691     caller);
692     goto failure;
693     }
694     /* write & add BSDF data blocks */
695     if (!writeBSDF(caller, fl))
696     goto failure;
697     ezxml_free(fl); /* all done */
698     return 1;
699     failure:
700     ezxml_free(fl);
701     return 0;
702     }
703    
704     /* Report usage and exit */
705     static void
706     UsageExit(const char *pname)
707     {
708     fputs("Usage: ", stderr);
709     fputs(pname, stderr);
710 greg 2.2 fputs(" [-W][-a {kf|kh|kq|t3|t4}][-u unit][-g geom][-f 'x=string;y=string']", stderr);
711     fputs(" [-s spectr][-tb inp][-tf inp][-rb inp][-rf inp]", stderr);
712     fputs(" [input.xml]\n", stderr);
713 greg 2.1 exit(1);
714     }
715    
716     /* Load XML file and use to wrap BSDF data (or modify fields) */
717     int
718     main(int argc, char *argv[])
719     {
720     int cur_spectrum = DSvisible;
721     int ncust_spec = 0;
722     int used_stdin = 0;
723     int units_set = 0;
724     int i;
725     /* get/check arguments */
726     for (i = 1; i < argc && argv[i][0] == '-'; i++) {
727     switch (argv[i][1]) {
728     case 'W': /* customize for WINDOW 6 output */
729     xml_input = win6_template;
730     continue;
731     case 'f': /* field assignment(s) */
732     if (++i >= argc)
733     UsageExit(argv[0]);
734     if (nfield_assign >= MAXASSIGN) {
735     fprintf(stderr, "%s: too many -f options",
736     argv[0]);
737     return 1;
738     }
739     field_assignment[nfield_assign++] = argv[i];
740     continue;
741     case 'u': /* unit */
742     if (++i >= argc)
743     UsageExit(argv[0]);
744     if (units_set++) {
745     fprintf(stderr, "%s: only one -u option allowed\n",
746     argv[0]);
747     return 1;
748     }
749 greg 2.2 if (strstr(legal_units, argv[i]) == NULL) {
750     fprintf(stderr, "%s: -u unit must be one of (%s)\n",
751 greg 2.1 argv[0], legal_units);
752     return 1;
753     }
754     attr_unit = argv[i];
755     continue;
756     case 'a': /* angle basis */
757     if (++i >= argc)
758     UsageExit(argv[0]);
759     if (angle_basis != ABdefault) {
760     fprintf(stderr, "%s: only one -a option allowed\n",
761     argv[0]);
762     return 1;
763     }
764     if (!strcasecmp(argv[i], "kf"))
765     angle_basis = ABklemsFull;
766     else if (!strcasecmp(argv[i], "kh"))
767     angle_basis = ABklemsHalf;
768     else if (!strcasecmp(argv[i], "kq"))
769     angle_basis = ABklemsQuarter;
770     else if (!strcasecmp(argv[i], "t3"))
771     angle_basis = ABtensorTree3;
772     else if (!strcasecmp(argv[i], "t4"))
773     angle_basis = ABtensorTree4;
774     else
775     UsageExit(argv[0]);
776     continue;
777 greg 2.7 case 'c': /* correct solid angle */
778     correct_solid_angle ^= 1;
779     continue;
780 greg 2.1 case 't': /* transmission */
781     if (i >= argc-1)
782     UsageExit(argv[0]);
783     if (ndataf >= MAXFILES) {
784     fprintf(stderr, "%s: too many data files\n",
785     argv[0]);
786     return 1;
787     }
788     if (!strcmp(argv[i], "-tf"))
789     data_file[ndataf].type = DTtransForward;
790     else if (!strcmp(argv[i], "-tb"))
791     data_file[ndataf].type = DTtransBackward;
792     else
793     UsageExit(argv[0]);
794     if (!strcmp(argv[++i], "-")) {
795     if (used_stdin++) UsageExit(argv[i]);
796     argv[i] = (char *)stdin_name;
797     }
798     data_file[ndataf].fname = argv[i];
799     data_file[ndataf].spectrum = cur_spectrum;
800     ndataf++;
801     continue;
802     case 'r': /* reflection */
803     if (i >= argc-1)
804     UsageExit(argv[0]);
805     if (ndataf >= MAXFILES) {
806     fprintf(stderr, "%s: too many data files\n",
807     argv[0]);
808     return 1;
809     }
810     if (!strcmp(argv[i], "-rf"))
811     data_file[ndataf].type = DTreflForward;
812     else if (!strcmp(argv[i], "-rb"))
813     data_file[ndataf].type = DTreflBackward;
814     else
815     UsageExit(argv[0]);
816     if (!strcmp(argv[++i], "-")) {
817     if (used_stdin++) UsageExit(argv[i]);
818     argv[i] = (char *)stdin_name;
819     }
820     data_file[ndataf].fname = argv[i];
821     data_file[ndataf++].spectrum = cur_spectrum;
822     continue;
823     case 's': /* spectrum name or input file */
824     if (++i >= argc)
825     UsageExit(argv[0]);
826     if (!strcasecmp(argv[i], "Solar"))
827     cur_spectrum = DSsolar;
828     else if (!strcasecmp(argv[i], "Visible") ||
829     !strcasecmp(argv[i], "CIE-Y"))
830     cur_spectrum = DSvisible;
831     else if (!strcasecmp(argv[i], "CIE-X"))
832     cur_spectrum = DSxbar31;
833     else if (!strcasecmp(argv[i], "CIE-Z"))
834     cur_spectrum = DSzbar31;
835     else if (!strcasecmp(argv[i], "NIR"))
836     cur_spectrum = DSnir;
837     else {
838     if (!strcmp(argv[i], "-")) {
839     fprintf(stderr,
840     "%s: cannot read spectra from stdin",
841     argv[0]);
842     return 1;
843     }
844     cur_spectrum = ncust_spec;
845     spectr_file[ncust_spec++] = argv[i];
846     }
847     continue;
848     case 'g': /* MGF geometry file */
849     if (i >= argc-1)
850     UsageExit(argv[0]);
851     if (mgf_geometry != NULL) {
852     fprintf(stderr, "%s: only one -g option allowed\n",
853     argv[0]);
854     return 1;
855     }
856     if (!strcmp(argv[++i], "-")) {
857     if (used_stdin++) UsageExit(argv[i]);
858     argv[i] = (char *)stdin_name;
859     }
860     mgf_geometry = argv[i];
861     continue;
862     case '\0': /* input XML from stdin */
863     break;
864     default:
865     UsageExit(argv[0]);
866     break;
867     }
868     break;
869     }
870     doneOptions: /* get XML input */
871     if (i >= argc) {
872     if (xml_input == NULL)
873     xml_input = def_template;
874     } else if ((i < argc-1) | (xml_input != NULL)) {
875     fprintf(stderr, "%s: only one XML input allowed\n", argv[0]);
876     UsageExit(argv[0]);
877     } else if (!strcmp(argv[i], "-")) {
878     if (used_stdin++) UsageExit(argv[0]);
879     xml_input = stdin_name;
880     } else {
881     xml_input = argv[i];
882     }
883     if ((xml_input == win6_template) & (angle_basis == ABdefault))
884     angle_basis = ABklemsFull;
885     /* wrap it! */
886     return !wrapBSDF(argv[0]);
887     }