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root/radiance/ray/src/util/wrapBSDF.c
Revision: 2.18
Committed: Tue Feb 2 22:34:00 2016 UTC (6 years, 9 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.17: +14 -2 lines
Log Message:
Refactored bsdf2ttree for Yuv representation

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.18 static const char RCSid[] = "$Id: wrapBSDF.c,v 2.17 2016/02/02 18:02:32 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 greg 2.17 #include "paths.h"
13 greg 2.1 #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 greg 2.16 /* comment list */
29     #define MAXCOMM 30
30     const char *commlist[MAXCOMM];
31     int ncomm = 0;
32 greg 2.6 /* angle bases */
33 greg 2.1 enum { ABdefault=-1, ABklemsFull=0, ABklemsHalf, ABklemsQuarter,
34     ABtensorTree3, ABtensorTree4, ABend };
35    
36     int angle_basis = ABdefault;
37    
38 greg 2.7 int correct_solid_angle = 0;
39    
40     const char *klems_basis_name[] = {
41     "LBNL/Klems Full",
42     "LBNL/Klems Half",
43     "LBNL/Klems Quarter",
44     };
45 greg 2.1 /* field IDs and nicknames */
46     struct s_fieldID {
47     char nickName[4];
48 greg 2.3 short has_unit;
49     short win_need;
50 greg 2.1 const char *fullName;
51     } XMLfieldID[] = {
52 greg 2.3 {"m", 0, 1, "Manufacturer"},
53     {"n", 0, 1, "Name"},
54     {"c", 0, 0, "ThermalConductivity"},
55     {"ef", 0, 0, "EmissivityFront"},
56     {"eb", 0, 0, "EmissivityBack"},
57     {"tir", 0, 0, "TIR"},
58     {"eo", 0, 0, "EffectiveOpennessFraction"},
59     {"t", 1, 1, "Thickness"},
60     {"h", 1, 0, "Height"},
61     {"w", 1, 0, "Width"},
62     {"\0", 0, 0, NULL} /* terminator */
63 greg 2.1 };
64     /* field assignments */
65     #define MAXASSIGN 12
66     const char *field_assignment[MAXASSIGN];
67     int nfield_assign = 0;
68     #define FASEP ';'
69     /* data file(s) & spectra */
70     enum { DTtransForward, DTtransBackward, DTreflForward, DTreflBackward };
71    
72 greg 2.11 enum { DSsolar=-1, DSnir=-2, DSxbar31=-3, DSvisible=-4, DSzbar31=-5,
73     DSuprime=-6, DSvprime=-7 };
74 greg 2.1
75     #define MAXFILES 20
76    
77     struct s_dfile {
78     const char *fname; /* input data file name */
79     short type; /* BSDF data type */
80     short spectrum; /* BSDF sensor spectrum */
81     } data_file[MAXFILES];
82    
83     int ndataf = 0; /* number of data files */
84    
85 greg 2.18 int unlink_datafiles = 0; /* unlink data files when done */
86    
87 greg 2.1 const char *spectr_file[MAXFILES]; /* custom spectral curve input */
88    
89     const char top_level_name[] = "WindowElement";
90    
91 greg 2.3 static char basis_definition[][256] = {
92 greg 2.1
93 greg 2.4 "\t<DataDefinition>\n"
94 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
95     "\t\t<AngleBasis>\n"
96     "\t\t\t<AngleBasisName>LBNL/Klems Full</AngleBasisName>\n"
97 greg 2.4 "\t\t\t</AngleBasis>\n"
98     "\t</DataDefinition>\n",
99 greg 2.1
100 greg 2.4 "\t<DataDefinition>\n"
101 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
102     "\t\t<AngleBasis>\n"
103     "\t\t\t<AngleBasisName>LBNL/Klems Half</AngleBasisName>\n"
104 greg 2.4 "\t\t\t</AngleBasis>\n"
105     "\t</DataDefinition>\n",
106 greg 2.1
107 greg 2.4 "\t<DataDefinition>\n"
108 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
109     "\t\t<AngleBasis>\n"
110     "\t\t\t<AngleBasisName>LBNL/Klems Quarter</AngleBasisName>\n"
111 greg 2.4 "\t\t\t</AngleBasis>\n"
112     "\t</DataDefinition>\n",
113 greg 2.1
114 greg 2.4 "\t<DataDefinition>\n"
115     "\t\t<IncidentDataStructure>TensorTree3</IncidentDataStructure>\n"
116     "\t</DataDefinition>\n",
117    
118     "\t<DataDefinition>\n"
119     "\t\t<IncidentDataStructure>TensorTree4</IncidentDataStructure>\n"
120     "\t</DataDefinition>\n",
121 greg 2.1 };
122    
123     /* Copy data from file descriptor to stdout and close */
124     static int
125     copy_and_close(int fd)
126     {
127     int ok = 1;
128     char buf[8192];
129     int n;
130    
131     if (fd < 0)
132     return 0;
133     while ((n = read(fd, buf, sizeof(buf))) > 0)
134     if (write(fileno(stdout), buf, n) != n) {
135     ok = 0;
136     break;
137     }
138     ok &= (n == 0);
139     close(fd);
140     return ok;
141     }
142    
143     /* Allocate and assign string from file or stream */
144     static char *
145     input2str(const char *inpspec)
146     {
147     FILE *fp = NULL;
148     char *str;
149     int len, pos, n;
150    
151     if (inpspec == NULL || !*inpspec)
152     return "";
153     if (inpspec == stdin_name) { /* read from stdin */
154     fp = stdin;
155 greg 2.2 } else if (inpspec[0] == '!') { /* read from command */
156 greg 2.1 fp = popen(inpspec+1, "r");
157     if (fp == NULL) {
158     fprintf(stderr, "Cannot start process '%s'\n",
159 greg 2.2 inpspec);
160 greg 2.1 return "";
161     }
162     } else { /* else load file */
163     int fd = open(inpspec, O_RDONLY);
164     if (fd < 0) {
165     fprintf(stderr, "%s: cannot open\n", inpspec);
166     return "";
167     }
168 greg 2.12 #ifndef _WIN32 /* XXX somehow broken on Windows */
169 greg 2.1 len = lseek(fd, 0L, SEEK_END);
170 greg 2.3 if (len > 0) {
171     lseek(fd, 0L, SEEK_SET);
172     str = (char *)malloc(len+1);
173     if (str == NULL) {
174     close(fd);
175     goto memerr;
176     }
177     if (read(fd, str, len) != len) {
178     fprintf(stderr, "%s: read error\n", inpspec);
179     free(str);
180     close(fd);
181     return "";
182     }
183     str[len] = '\0';
184 greg 2.1 close(fd);
185 greg 2.3 return str;
186 greg 2.1 }
187 greg 2.12 #endif
188 greg 2.3 fp = fdopen(fd, "r"); /* not a regular file */
189 greg 2.1 }
190     /* reading from stream */
191     str = (char *)malloc((len=8192)+1);
192     if (str == NULL)
193     goto memerr;
194     pos = 0;
195     while ((n = read(fileno(fp), str+pos, len-pos)) > 0)
196     if ((pos += n) >= len) { /* need more space? */
197     str = (char *)realloc(str, (len += len>>2) + 1);
198     if (str == NULL)
199     goto memerr;
200     }
201     if (n < 0) {
202     fprintf(stderr, "%s: read error\n", inpspec);
203     free(str);
204     str = "";
205     } else { /* tidy up result */
206     str[pos] = '\0';
207     str = (char *)realloc(str, (len=pos)+1);
208     if (str == NULL)
209     goto memerr;
210     }
211 greg 2.2 if (inpspec[0] != '!')
212 greg 2.1 fclose(fp);
213     else if (pclose(fp))
214 greg 2.2 fprintf(stderr, "Error running command '%s'\n", inpspec);
215 greg 2.1 return str;
216     memerr:
217     fprintf(stderr, "%s: error allocating memory\n", inpspec);
218     if (fp != NULL)
219 greg 2.2 (inpspec[0] == '!') ? pclose(fp) : fclose(fp);
220 greg 2.1 return "";
221     }
222    
223     /* Make material assignments in field_assignment to XML fields */
224     static int
225     mat_assignments(const char *caller, const char *fn, ezxml_t wtl)
226     {
227     int i;
228    
229     wtl = ezxml_child(wtl, "Material");
230     if (wtl == NULL) {
231     fprintf(stderr, "%s: missing <Material> tag\n", fn);
232     return 0;
233     }
234     for (i = 0; i < nfield_assign; i++) {
235     const char *fnext = field_assignment[i];
236     for ( ; ; ) {
237 greg 2.5 int added = 0;
238 greg 2.1 ezxml_t fld;
239     char sbuf[512];
240     int j;
241    
242     while (isspace(*fnext))
243     ++fnext;
244     if (!*fnext)
245     break;
246 greg 2.3 for (j = 0; *fnext != '=' && !isspace(*fnext); ) {
247 greg 2.1 if (!*fnext | (*fnext == FASEP) |
248     (j >= sizeof(sbuf)-1)) {
249     fprintf(stderr,
250     "%s: bad tag name in assignment '%s'\n",
251     caller, field_assignment[i]);
252     return 0;
253     }
254     sbuf[j++] = *fnext++;
255     }
256 greg 2.2 sbuf[j] = '\0'; /* check known field */
257 greg 2.1 for (j = 0; XMLfieldID[j].nickName[0]; j++)
258 greg 2.2 if (!strcasecmp(sbuf, XMLfieldID[j].nickName) ||
259     !strcasecmp(sbuf, XMLfieldID[j].fullName)) {
260 greg 2.1 strcpy(sbuf, XMLfieldID[j].fullName);
261     break;
262     }
263     /* check if tag exists */
264     fld = ezxml_child(wtl, sbuf);
265     if (fld == NULL) { /* otherwise, create one */
266 greg 2.3 if (!XMLfieldID[j].nickName[0])
267     fprintf(stderr,
268     "%s: warning - adding tag <%s>\n",
269     fn, sbuf);
270 greg 2.5 ezxml_add_txt(wtl, "\t");
271 greg 2.1 fld = ezxml_add_child_d(wtl, sbuf, strlen(wtl->txt));
272 greg 2.5 ++added;
273 greg 2.1 }
274     if (XMLfieldID[j].has_unit)
275     ezxml_set_attr(fld, "unit", attr_unit);
276 greg 2.3 XMLfieldID[j].win_need = 0;
277 greg 2.1 while (isspace(*fnext))
278     ++fnext;
279     if (*fnext++ != '=') {
280     fprintf(stderr,
281     "%s: missing '=' in assignment '%s'\n",
282     caller, field_assignment[i]);
283     return 0;
284     }
285 greg 2.3 for (j = 0; *fnext && *fnext != FASEP; ) {
286 greg 2.1 if (j >= sizeof(sbuf)-1) {
287     fprintf(stderr,
288     "%s: field too long in '%s'\n",
289     caller, field_assignment[i]);
290     return 0;
291     }
292     sbuf[j++] = *fnext++;
293     }
294     sbuf[j] = '\0';
295     ezxml_set_txt_d(fld, sbuf);
296 greg 2.5 if (added)
297     ezxml_add_txt(wtl, "\n\t");
298 greg 2.1 fnext += (*fnext == FASEP);
299     }
300     }
301 greg 2.3 /* check required WINDOW settings */
302     if (xml_input == win6_template)
303     for (i = 0; XMLfieldID[i].nickName[0]; i++)
304     if (XMLfieldID[i].win_need &&
305 greg 2.10 !ezxml_txt(ezxml_child(wtl,XMLfieldID[i].fullName))[0])
306 greg 2.3 fprintf(stderr,
307 greg 2.10 "%s: warning - missing '%s' assignment for WINDOW <%s>\n",
308 greg 2.3 caller, XMLfieldID[i].nickName,
309     XMLfieldID[i].fullName);
310 greg 2.10 return 1;
311 greg 2.1 }
312    
313     /* Complete angle basis specification */
314     static int
315     finish_angle_basis(ezxml_t ab)
316     {
317     const char *bn = ezxml_txt(ezxml_child(ab, "AngleBasisName"));
318     int i, n = nabases;
319     char buf[32];
320    
321     if (!*bn) {
322     fputs("Internal error - missing <AngleBasisName>!\n", stderr);
323     return 0;
324     }
325     while (n-- > 0)
326     if (!strcasecmp(bn, abase_list[n].name))
327     break;
328     if (n < 0) {
329     fprintf(stderr, "Internal error - unknown angle basis '%s'", bn);
330     return 0;
331     }
332     for (i = 0; abase_list[n].lat[i].nphis; i++) {
333     ezxml_t tb, abb = ezxml_add_child(ab, "AngleBasisBlock",
334     strlen(ab->txt));
335     sprintf(buf, "%g", i ?
336     .5*(abase_list[n].lat[i].tmin + abase_list[n].lat[i+1].tmin) :
337     .0);
338 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
339 greg 2.1 ezxml_set_txt_d(ezxml_add_child(abb,"Theta",strlen(abb->txt)), buf);
340     sprintf(buf, "%d", abase_list[n].lat[i].nphis);
341 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
342 greg 2.1 ezxml_set_txt_d(ezxml_add_child(abb,"nPhis",strlen(abb->txt)), buf);
343 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
344 greg 2.1 tb = ezxml_add_child(abb, "ThetaBounds", strlen(abb->txt));
345 greg 2.4 ezxml_add_txt(tb, "\n\t\t\t\t\t");
346 greg 2.1 sprintf(buf, "%g", abase_list[n].lat[i].tmin);
347 greg 2.4 ezxml_set_txt_d(ezxml_add_child(tb,"LowerTheta",strlen(tb->txt)), buf);
348     ezxml_add_txt(tb, "\n\t\t\t\t\t");
349 greg 2.1 sprintf(buf, "%g", abase_list[n].lat[i+1].tmin);
350 greg 2.4 ezxml_set_txt_d(ezxml_add_child(tb,"UpperTheta",strlen(tb->txt)), buf);
351     ezxml_add_txt(tb, "\n\t\t\t\t");
352     ezxml_add_txt(abb, "\n\t\t\t");
353     ezxml_add_txt(ab, "\n\t\t\t");
354 greg 2.1 }
355     return 1;
356     }
357    
358     /* Determine our angle basis from current tags */
359     static int
360     determine_angle_basis(const char *fn, ezxml_t wtl)
361     {
362     const char *ids;
363     int i;
364    
365     wtl = ezxml_child(wtl, "DataDefinition");
366     if (wtl == NULL)
367     return -1;
368     ids = ezxml_txt(ezxml_child(wtl, "IncidentDataStructure"));
369 greg 2.4 if (!ids[0])
370 greg 2.1 return -1;
371     for (i = 0; i < ABend; i++) {
372     ezxml_t parsed = ezxml_parse_str(basis_definition[i],
373     strlen(basis_definition[i]));
374     int match = 0;
375     if (!strcmp(ids, ezxml_txt(ezxml_child(parsed,
376     "IncidentDataStructure")))) {
377     const char *abn0 = ezxml_txt(
378     ezxml_child(ezxml_child(wtl,
379     "AngleBasis"), "AngleBasisName"));
380     const char *abn1 = ezxml_txt(
381     ezxml_child(ezxml_child(parsed,
382     "AngleBasis"), "AngleBasisName"));
383     match = !strcmp(abn0, abn1);
384     }
385     ezxml_free(parsed);
386     if (match)
387     return i;
388     }
389     return -1;
390     }
391    
392 greg 2.7 /* Filter Klems angle basis, factoring out incident projected solid angle */
393 greg 2.6 static int
394     filter_klems_matrix(FILE *fp)
395     {
396     #define MAX_COLUMNS 145
397 greg 2.7 const char *bn = klems_basis_name[angle_basis];
398 greg 2.6 float col_corr[MAX_COLUMNS];
399     int i, j, n = nabases;
400     /* get angle basis */
401     while (n-- > 0)
402     if (!strcasecmp(bn, abase_list[n].name))
403     break;
404     if (n < 0)
405     return 0;
406     if (abase_list[n].nangles > MAX_COLUMNS) {
407 greg 2.7 fputs("Internal error - too many Klems columns!\n", stderr);
408 greg 2.6 return 0;
409     }
410     /* get correction factors */
411     for (j = abase_list[n].nangles; j--; )
412     col_corr[j] = 1.f / io_getohm(j, &abase_list[n]);
413     /* read/correct/write matrix */
414     for (i = 0; i < abase_list[n].nangles; i++) {
415     for (j = 0; j < abase_list[n].nangles; j++) {
416     double d;
417     if (fscanf(fp, "%lf", &d) != 1)
418     return 0;
419 greg 2.7 if (d < -1e-3) {
420     fputs("Negative BSDF data!\n", stderr);
421     return 0;
422     }
423     printf(" %.3e", d*col_corr[j]*(d > 0));
424 greg 2.6 }
425     fputc('\n', stdout);
426     }
427 greg 2.7 while ((i = getc(fp)) != EOF)
428     if (!isspace(i)) {
429     fputs("Unexpected data past EOF\n", stderr);
430     return 0;
431     }
432     return 1; /* all is good */
433 greg 2.6 #undef MAX_COLUMNS
434     }
435    
436 greg 2.1 /* Write out BSDF data block with surrounding tags */
437     static int
438     writeBSDFblock(const char *caller, struct s_dfile *df)
439     {
440 greg 2.7 int correct_klems = correct_solid_angle;
441 greg 2.1 char *cp;
442    
443     puts("\t<WavelengthData>");
444     puts("\t\t<LayerNumber>System</LayerNumber>");
445     switch (df->spectrum) {
446     case DSvisible:
447     puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
448 greg 2.7 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
449 greg 2.1 puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
450     break;
451     case DSxbar31:
452     puts("\t\t<Wavelength unit=\"Integral\">CIE-X</Wavelength>");
453 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
454 greg 2.1 puts("\t\t<DetectorSpectrum>ASTM E308 1931 X.dsp</DetectorSpectrum>");
455     break;
456     case DSzbar31:
457     puts("\t\t<Wavelength unit=\"Integral\">CIE-Z</Wavelength>");
458 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
459 greg 2.1 puts("\t\t<DetectorSpectrum>ASTM E308 1931 Z.dsp</DetectorSpectrum>");
460     break;
461 greg 2.11 case DSuprime:
462 greg 2.13 puts("\t\t<Wavelength unit=\"Integral\">CIE-u</Wavelength>");
463 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
464 greg 2.11 break;
465     case DSvprime:
466 greg 2.13 puts("\t\t<Wavelength unit=\"Integral\">CIE-v</Wavelength>");
467 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
468 greg 2.11 break;
469 greg 2.1 case DSsolar:
470     puts("\t\t<Wavelength unit=\"Integral\">Solar</Wavelength>");
471 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
472 greg 2.1 puts("\t\t<DetectorSpectrum>None</DetectorSpectrum>");
473     break;
474     case DSnir:
475     puts("\t\t<Wavelength unit=\"Integral\">NIR</Wavelength>");
476 greg 2.14 puts("\t\t<SourceSpectrum>PLACE_HOLDER</SourceSpectrum>");
477 greg 2.1 puts("\t\t<DetectorSpectrum>PLACE_HOLDER</DetectorSpectrum>");
478     break;
479     default:
480     cp = strrchr(spectr_file[df->spectrum], '.');
481     if (cp != NULL)
482     *cp = '\0';
483     printf("\t\t<Wavelength unit=\"Integral\">%s</Wavelength>\n",
484     spectr_file[df->spectrum]);
485     if (cp != NULL)
486     *cp = '.';
487 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
488 greg 2.1 printf("\t\t<DetectorSpectrum>%s</DetectorSpectrum>\n",
489     spectr_file[df->spectrum]);
490     break;
491     }
492     puts("\t\t<WavelengthDataBlock>");
493     fputs("\t\t\t<WavelengthDataDirection>", stdout);
494     switch (df->type) {
495     case DTtransForward:
496     fputs("Transmission Front", stdout);
497     break;
498     case DTtransBackward:
499     fputs("Transmission Back", stdout);
500     break;
501     case DTreflForward:
502     fputs("Reflection Front", stdout);
503     break;
504     case DTreflBackward:
505     fputs("Reflection Back", stdout);
506     break;
507     default:
508     fprintf(stderr, "%s: internal - bad BSDF type (%d)\n", caller, df->type);
509     return 0;
510     }
511     puts("</WavelengthDataDirection>");
512     switch (angle_basis) {
513     case ABklemsFull:
514     case ABklemsHalf:
515     case ABklemsQuarter:
516 greg 2.7 fputs("\t\t\t<ColumnAngleBasis>", stdout);
517     fputs(klems_basis_name[angle_basis], stdout);
518     puts("</ColumnAngleBasis>");
519     fputs("\t\t\t<RowAngleBasis>", stdout);
520     fputs(klems_basis_name[angle_basis], stdout);
521     puts("</RowAngleBasis>");
522 greg 2.1 break;
523     case ABtensorTree3:
524     case ABtensorTree4:
525     puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
526 greg 2.7 correct_klems = 0;
527 greg 2.1 break;
528     default:
529     fprintf(stderr, "%s: bad angle basis (%d)\n", caller, angle_basis);
530     return 0;
531     }
532     puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
533     puts("\t\t\t<ScatteringData>");
534     fflush(stdout);
535 greg 2.7 if (correct_klems) { /* correct Klems matrix data */
536 greg 2.6 FILE *fp = stdin;
537     if (df->fname[0] == '!')
538     fp = popen(df->fname+1, "r");
539     else if (df->fname != stdin_name)
540     fp = fopen(df->fname, "r");
541     if (fp == NULL) {
542     fprintf(stderr, "%s: cannot open '%s'\n",
543     caller, df->fname);
544     return 0;
545     }
546     if (!filter_klems_matrix(fp)) {
547     fprintf(stderr, "%s: Klems data error from '%s'\n",
548     caller, df->fname);
549     return 0;
550     }
551     if (df->fname[0] != '!') {
552     fclose(fp);
553     } else if (pclose(fp)) {
554     fprintf(stderr, "%s: error running '%s'\n",
555     caller, df->fname);
556     return 0;
557     }
558     } else if (df->fname == stdin_name) {
559 greg 2.1 copy_and_close(fileno(stdin));
560 greg 2.2 } else if (df->fname[0] != '!') {
561 greg 2.1 if (!copy_and_close(open(df->fname, O_RDONLY))) {
562     fprintf(stderr, "%s: error reading from '%s'\n",
563     caller, df->fname);
564     return 0;
565     }
566     } else if (system(df->fname+1)) {
567 greg 2.2 fprintf(stderr, "%s: error running '%s'\n", caller, df->fname);
568 greg 2.1 return 0;
569     }
570     puts("\t\t\t</ScatteringData>");
571     puts("\t\t</WavelengthDataBlock>");
572     puts("\t</WavelengthData>");
573     return 1;
574     }
575    
576     /* Write out XML, interpolating BSDF data block(s) */
577     static int
578     writeBSDF(const char *caller, ezxml_t fl)
579     {
580 greg 2.2 char *xml = ezxml_toxml(fl); /* store XML in string */
581 greg 2.1 int ei, i;
582     /* locate trailer */
583     for (ei = strlen(xml)-strlen("</Layer></Optical></WindowElement>");
584     ei >= 0; ei--)
585     if (!strncmp(xml+ei, "</Layer>", 8))
586     break;
587     if (ei < 0) {
588     fprintf(stderr, "%s: internal - cannot find trailer\n",
589     caller);
590     free(xml);
591     return 0;
592     }
593 greg 2.15 puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
594 greg 2.16 for (i = 0; i < ncomm; i++)
595     printf("<!-- %s -->\n", commlist[i]);
596 greg 2.1 fflush(stdout); /* write previous XML info. */
597     if (write(fileno(stdout), xml, ei) != ei) {
598     free(xml);
599     return 0;
600     }
601     for (i = 0; i < ndataf; i++) /* interpolate new data */
602     if (!writeBSDFblock(caller, &data_file[i])) {
603     free(xml);
604     return 0;
605     }
606     fputs(xml+ei, stdout); /* write trailer */
607 greg 2.2 free(xml); /* free string */
608 greg 2.4 fputc('\n', stdout);
609 greg 2.18 if (fflush(stdout) != 0)
610     return 0;
611     /* unlink data files if req. */
612     for (i = ndataf*(unlink_datafiles != 0); i--; )
613     if (data_file[i].fname != stdin_name &&
614     data_file[i].fname[0] != '!')
615     unlink(data_file[i].fname);
616     return 1;
617 greg 2.1 }
618    
619     /* Insert BSDF data into XML wrapper */
620     static int
621     wrapBSDF(const char *caller)
622     {
623 greg 2.2 const char *xml_path = xml_input;
624 greg 2.1 ezxml_t fl, wtl;
625     /* load previous XML/template */
626 greg 2.2 if (xml_input == stdin_name) {
627     fl = ezxml_parse_fp(stdin);
628     } else if (xml_input[0] == '!') {
629     FILE *pfp = popen(xml_input+1, "r");
630     if (pfp == NULL) {
631     fprintf(stderr, "%s: cannot start process '%s'\n",
632     caller, xml_input);
633     return 0;
634     }
635     fl = ezxml_parse_fp(pfp);
636     if (pclose(pfp)) {
637     fprintf(stderr, "%s: error running '%s'\n",
638     caller, xml_input);
639     return 0;
640     }
641     } else {
642     xml_path = getpath((char *)xml_input, getrlibpath(), R_OK);
643     if (xml_path == NULL) {
644     fprintf(stderr, "%s: cannot find XML file named '%s'\n",
645     caller, xml_input==NULL ? "NULL" : xml_input);
646     return 0;
647     }
648     fl = ezxml_parse_file(xml_path);
649 greg 2.1 }
650     if (fl == NULL) {
651 greg 2.2 fprintf(stderr, "%s: cannot load XML '%s'\n", caller, xml_path);
652 greg 2.1 return 0;
653     }
654     if (ezxml_error(fl)[0]) {
655 greg 2.2 fprintf(stderr, "%s: error in XML '%s': %s\n", caller, xml_path,
656 greg 2.1 ezxml_error(fl));
657     goto failure;
658     }
659     if (strcmp(ezxml_name(fl), top_level_name)) {
660     fprintf(stderr, "%s: top level in XML '%s' not '%s'\n",
661     caller, xml_path, top_level_name);
662     goto failure;
663     }
664     wtl = ezxml_child(fl, "FileType");
665     if (wtl != NULL && strcmp(ezxml_txt(wtl), "BSDF")) {
666     fprintf(stderr, "%s: wrong FileType in XML '%s' (must be 'BSDF')",
667     caller, xml_path);
668     goto failure;
669     }
670     wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer");
671     if (wtl == NULL) {
672     fprintf(stderr, "%s: no optical layers in XML '%s'",
673     caller, xml_path);
674     goto failure;
675     }
676     /* make material assignments */
677 greg 2.3 if (!mat_assignments(caller, xml_path, wtl))
678 greg 2.1 goto failure;
679     if (mgf_geometry != NULL) { /* add geometry if specified */
680     ezxml_t geom = ezxml_child(wtl, "Geometry");
681     if (geom == NULL)
682 greg 2.3 geom = ezxml_add_child(wtl, "Geometry", strlen(wtl->txt));
683 greg 2.1 ezxml_set_attr(geom, "format", "MGF");
684     geom = ezxml_child(geom, "MGFblock");
685     if (geom == NULL) {
686     geom = ezxml_child(wtl, "Geometry");
687 greg 2.3 geom = ezxml_add_child(geom, "MGFblock", 0);
688 greg 2.1 }
689     ezxml_set_attr(geom, "unit", attr_unit);
690     ezxml_set_txt(geom, input2str(mgf_geometry));
691     if (geom->txt[0])
692     ezxml_set_flag(geom, EZXML_TXTM);
693     }
694     /* check basis */
695     if (angle_basis != ABdefault) {
696 greg 2.4 size_t offset = 0;
697 greg 2.1 ezxml_t ab, dd = ezxml_child(wtl, "DataDefinition");
698 greg 2.4 if (dd != NULL) {
699     offset = dd->off;
700 greg 2.5 if (dd->child != NULL)
701     fprintf(stderr,
702 greg 2.1 "%s: warning - replacing existing <DataDefinition> in '%s'\n",
703     caller, xml_path);
704 greg 2.4 ezxml_remove(dd);
705     } else
706     offset = strlen(wtl->txt);
707     dd = ezxml_insert(ezxml_parse_str(basis_definition[angle_basis],
708 greg 2.1 strlen(basis_definition[angle_basis])),
709 greg 2.4 wtl, offset);
710 greg 2.1 if ((ab = ezxml_child(dd, "AngleBasis")) != NULL &&
711     !finish_angle_basis(ab))
712     goto failure;
713     } else if ((angle_basis = determine_angle_basis(xml_path, wtl)) < 0) {
714     fprintf(stderr, "%s: need -a option to set angle basis\n",
715     caller);
716     goto failure;
717     }
718     /* write & add BSDF data blocks */
719     if (!writeBSDF(caller, fl))
720     goto failure;
721     ezxml_free(fl); /* all done */
722     return 1;
723     failure:
724     ezxml_free(fl);
725     return 0;
726     }
727    
728     /* Report usage and exit */
729     static void
730     UsageExit(const char *pname)
731     {
732     fputs("Usage: ", stderr);
733     fputs(pname, stderr);
734 greg 2.11 fputs(" [-W][-c][-a {kf|kh|kq|t3|t4}][-u unit][-g geom][-f 'x=string;y=string']", stderr);
735 greg 2.16 fputs(" [-s spectr][-tb inp][-tf inp][-rb inp][-rf inp][-C comm]", stderr);
736 greg 2.2 fputs(" [input.xml]\n", stderr);
737 greg 2.1 exit(1);
738     }
739    
740     /* Load XML file and use to wrap BSDF data (or modify fields) */
741     int
742     main(int argc, char *argv[])
743     {
744     int cur_spectrum = DSvisible;
745     int ncust_spec = 0;
746     int used_stdin = 0;
747     int units_set = 0;
748     int i;
749     /* get/check arguments */
750     for (i = 1; i < argc && argv[i][0] == '-'; i++) {
751     switch (argv[i][1]) {
752     case 'W': /* customize for WINDOW 6 output */
753     xml_input = win6_template;
754     continue;
755     case 'f': /* field assignment(s) */
756     if (++i >= argc)
757     UsageExit(argv[0]);
758     if (nfield_assign >= MAXASSIGN) {
759     fprintf(stderr, "%s: too many -f options",
760     argv[0]);
761     return 1;
762     }
763     field_assignment[nfield_assign++] = argv[i];
764     continue;
765     case 'u': /* unit */
766     if (++i >= argc)
767     UsageExit(argv[0]);
768     if (units_set++) {
769     fprintf(stderr, "%s: only one -u option allowed\n",
770     argv[0]);
771     return 1;
772     }
773 greg 2.2 if (strstr(legal_units, argv[i]) == NULL) {
774     fprintf(stderr, "%s: -u unit must be one of (%s)\n",
775 greg 2.1 argv[0], legal_units);
776     return 1;
777     }
778     attr_unit = argv[i];
779     continue;
780 greg 2.18 case 'U': /* unlink data files when done */
781     unlink_datafiles = 1;
782     continue;
783 greg 2.1 case 'a': /* angle basis */
784     if (++i >= argc)
785     UsageExit(argv[0]);
786     if (angle_basis != ABdefault) {
787     fprintf(stderr, "%s: only one -a option allowed\n",
788     argv[0]);
789     return 1;
790     }
791     if (!strcasecmp(argv[i], "kf"))
792     angle_basis = ABklemsFull;
793     else if (!strcasecmp(argv[i], "kh"))
794     angle_basis = ABklemsHalf;
795     else if (!strcasecmp(argv[i], "kq"))
796     angle_basis = ABklemsQuarter;
797     else if (!strcasecmp(argv[i], "t3"))
798     angle_basis = ABtensorTree3;
799     else if (!strcasecmp(argv[i], "t4"))
800     angle_basis = ABtensorTree4;
801     else
802     UsageExit(argv[0]);
803     continue;
804 greg 2.7 case 'c': /* correct solid angle */
805 greg 2.9 correct_solid_angle = 1;
806 greg 2.7 continue;
807 greg 2.16 case 'C': /* comment */
808     if (ncomm >= MAXCOMM) {
809     fprintf(stderr, "%s: too many comments\n",
810     argv[0]);
811     return 1;
812     }
813     if (strchr(argv[++i], '>') != NULL) {
814     fprintf(stderr, "%s: illegal character in comment\n",
815     argv[0]);
816     return 1;
817     }
818     commlist[ncomm++] = argv[i];
819     continue;
820 greg 2.1 case 't': /* transmission */
821     if (i >= argc-1)
822     UsageExit(argv[0]);
823     if (ndataf >= MAXFILES) {
824     fprintf(stderr, "%s: too many data files\n",
825     argv[0]);
826     return 1;
827     }
828     if (!strcmp(argv[i], "-tf"))
829     data_file[ndataf].type = DTtransForward;
830     else if (!strcmp(argv[i], "-tb"))
831     data_file[ndataf].type = DTtransBackward;
832     else
833     UsageExit(argv[0]);
834     if (!strcmp(argv[++i], "-")) {
835     if (used_stdin++) UsageExit(argv[i]);
836     argv[i] = (char *)stdin_name;
837     }
838     data_file[ndataf].fname = argv[i];
839     data_file[ndataf].spectrum = cur_spectrum;
840     ndataf++;
841     continue;
842     case 'r': /* reflection */
843     if (i >= argc-1)
844     UsageExit(argv[0]);
845     if (ndataf >= MAXFILES) {
846     fprintf(stderr, "%s: too many data files\n",
847     argv[0]);
848     return 1;
849     }
850     if (!strcmp(argv[i], "-rf"))
851     data_file[ndataf].type = DTreflForward;
852     else if (!strcmp(argv[i], "-rb"))
853     data_file[ndataf].type = DTreflBackward;
854     else
855     UsageExit(argv[0]);
856     if (!strcmp(argv[++i], "-")) {
857     if (used_stdin++) UsageExit(argv[i]);
858     argv[i] = (char *)stdin_name;
859     }
860     data_file[ndataf].fname = argv[i];
861 greg 2.8 data_file[ndataf].spectrum = cur_spectrum;
862     ndataf++;
863 greg 2.1 continue;
864     case 's': /* spectrum name or input file */
865     if (++i >= argc)
866     UsageExit(argv[0]);
867     if (!strcasecmp(argv[i], "Solar"))
868     cur_spectrum = DSsolar;
869     else if (!strcasecmp(argv[i], "Visible") ||
870     !strcasecmp(argv[i], "CIE-Y"))
871     cur_spectrum = DSvisible;
872     else if (!strcasecmp(argv[i], "CIE-X"))
873     cur_spectrum = DSxbar31;
874     else if (!strcasecmp(argv[i], "CIE-Z"))
875     cur_spectrum = DSzbar31;
876 greg 2.11 else if (!strcasecmp(argv[i], "CIE-u"))
877     cur_spectrum = DSuprime;
878     else if (!strcasecmp(argv[i], "CIE-v"))
879     cur_spectrum = DSvprime;
880 greg 2.1 else if (!strcasecmp(argv[i], "NIR"))
881     cur_spectrum = DSnir;
882     else {
883     if (!strcmp(argv[i], "-")) {
884     fprintf(stderr,
885     "%s: cannot read spectra from stdin",
886     argv[0]);
887     return 1;
888     }
889     cur_spectrum = ncust_spec;
890     spectr_file[ncust_spec++] = argv[i];
891     }
892     continue;
893     case 'g': /* MGF geometry file */
894     if (i >= argc-1)
895     UsageExit(argv[0]);
896     if (mgf_geometry != NULL) {
897     fprintf(stderr, "%s: only one -g option allowed\n",
898     argv[0]);
899     return 1;
900     }
901     if (!strcmp(argv[++i], "-")) {
902     if (used_stdin++) UsageExit(argv[i]);
903     argv[i] = (char *)stdin_name;
904     }
905     mgf_geometry = argv[i];
906     continue;
907     case '\0': /* input XML from stdin */
908     break;
909     default:
910     UsageExit(argv[0]);
911     break;
912     }
913     break;
914     }
915     doneOptions: /* get XML input */
916     if (i >= argc) {
917     if (xml_input == NULL)
918     xml_input = def_template;
919     } else if ((i < argc-1) | (xml_input != NULL)) {
920     fprintf(stderr, "%s: only one XML input allowed\n", argv[0]);
921     UsageExit(argv[0]);
922     } else if (!strcmp(argv[i], "-")) {
923     if (used_stdin++) UsageExit(argv[0]);
924     xml_input = stdin_name;
925     } else {
926     xml_input = argv[i];
927     }
928     /* wrap it! */
929     return !wrapBSDF(argv[0]);
930     }