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root/radiance/ray/src/util/wrapBSDF.c
Revision: 2.15
Committed: Fri May 29 07:16:49 2015 UTC (7 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.14: +2 -1 lines
Log Message:
Added required character type information.

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.15 static const char RCSid[] = "$Id: wrapBSDF.c,v 2.14 2015/04/02 16:40:32 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     #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 greg 2.11 enum { DSsolar=-1, DSnir=-2, DSxbar31=-3, DSvisible=-4, DSzbar31=-5,
70     DSuprime=-6, DSvprime=-7 };
71 greg 2.1
72     #define MAXFILES 20
73    
74     struct s_dfile {
75     const char *fname; /* input data file name */
76     short type; /* BSDF data type */
77     short spectrum; /* BSDF sensor spectrum */
78     } data_file[MAXFILES];
79    
80     int ndataf = 0; /* number of data files */
81    
82     const char *spectr_file[MAXFILES]; /* custom spectral curve input */
83    
84     const char top_level_name[] = "WindowElement";
85    
86 greg 2.3 static char basis_definition[][256] = {
87 greg 2.1
88 greg 2.4 "\t<DataDefinition>\n"
89 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
90     "\t\t<AngleBasis>\n"
91     "\t\t\t<AngleBasisName>LBNL/Klems Full</AngleBasisName>\n"
92 greg 2.4 "\t\t\t</AngleBasis>\n"
93     "\t</DataDefinition>\n",
94 greg 2.1
95 greg 2.4 "\t<DataDefinition>\n"
96 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
97     "\t\t<AngleBasis>\n"
98     "\t\t\t<AngleBasisName>LBNL/Klems Half</AngleBasisName>\n"
99 greg 2.4 "\t\t\t</AngleBasis>\n"
100     "\t</DataDefinition>\n",
101 greg 2.1
102 greg 2.4 "\t<DataDefinition>\n"
103 greg 2.1 "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
104     "\t\t<AngleBasis>\n"
105     "\t\t\t<AngleBasisName>LBNL/Klems Quarter</AngleBasisName>\n"
106 greg 2.4 "\t\t\t</AngleBasis>\n"
107     "\t</DataDefinition>\n",
108 greg 2.1
109 greg 2.4 "\t<DataDefinition>\n"
110     "\t\t<IncidentDataStructure>TensorTree3</IncidentDataStructure>\n"
111     "\t</DataDefinition>\n",
112    
113     "\t<DataDefinition>\n"
114     "\t\t<IncidentDataStructure>TensorTree4</IncidentDataStructure>\n"
115     "\t</DataDefinition>\n",
116 greg 2.1 };
117    
118     /* Copy data from file descriptor to stdout and close */
119     static int
120     copy_and_close(int fd)
121     {
122     int ok = 1;
123     char buf[8192];
124     int n;
125    
126     if (fd < 0)
127     return 0;
128     while ((n = read(fd, buf, sizeof(buf))) > 0)
129     if (write(fileno(stdout), buf, n) != n) {
130     ok = 0;
131     break;
132     }
133     ok &= (n == 0);
134     close(fd);
135     return ok;
136     }
137    
138     /* Allocate and assign string from file or stream */
139     static char *
140     input2str(const char *inpspec)
141     {
142     FILE *fp = NULL;
143     char *str;
144     int len, pos, n;
145    
146     if (inpspec == NULL || !*inpspec)
147     return "";
148     if (inpspec == stdin_name) { /* read from stdin */
149     fp = stdin;
150 greg 2.2 } else if (inpspec[0] == '!') { /* read from command */
151 greg 2.1 fp = popen(inpspec+1, "r");
152     if (fp == NULL) {
153     fprintf(stderr, "Cannot start process '%s'\n",
154 greg 2.2 inpspec);
155 greg 2.1 return "";
156     }
157     } else { /* else load file */
158     int fd = open(inpspec, O_RDONLY);
159     if (fd < 0) {
160     fprintf(stderr, "%s: cannot open\n", inpspec);
161     return "";
162     }
163 greg 2.12 #ifndef _WIN32 /* XXX somehow broken on Windows */
164 greg 2.1 len = lseek(fd, 0L, SEEK_END);
165 greg 2.3 if (len > 0) {
166     lseek(fd, 0L, SEEK_SET);
167     str = (char *)malloc(len+1);
168     if (str == NULL) {
169     close(fd);
170     goto memerr;
171     }
172     if (read(fd, str, len) != len) {
173     fprintf(stderr, "%s: read error\n", inpspec);
174     free(str);
175     close(fd);
176     return "";
177     }
178     str[len] = '\0';
179 greg 2.1 close(fd);
180 greg 2.3 return str;
181 greg 2.1 }
182 greg 2.12 #endif
183 greg 2.3 fp = fdopen(fd, "r"); /* not a regular file */
184 greg 2.1 }
185     /* reading from stream */
186     str = (char *)malloc((len=8192)+1);
187     if (str == NULL)
188     goto memerr;
189     pos = 0;
190     while ((n = read(fileno(fp), str+pos, len-pos)) > 0)
191     if ((pos += n) >= len) { /* need more space? */
192     str = (char *)realloc(str, (len += len>>2) + 1);
193     if (str == NULL)
194     goto memerr;
195     }
196     if (n < 0) {
197     fprintf(stderr, "%s: read error\n", inpspec);
198     free(str);
199     str = "";
200     } else { /* tidy up result */
201     str[pos] = '\0';
202     str = (char *)realloc(str, (len=pos)+1);
203     if (str == NULL)
204     goto memerr;
205     }
206 greg 2.2 if (inpspec[0] != '!')
207 greg 2.1 fclose(fp);
208     else if (pclose(fp))
209 greg 2.2 fprintf(stderr, "Error running command '%s'\n", inpspec);
210 greg 2.1 return str;
211     memerr:
212     fprintf(stderr, "%s: error allocating memory\n", inpspec);
213     if (fp != NULL)
214 greg 2.2 (inpspec[0] == '!') ? pclose(fp) : fclose(fp);
215 greg 2.1 return "";
216     }
217    
218     /* Make material assignments in field_assignment to XML fields */
219     static int
220     mat_assignments(const char *caller, const char *fn, ezxml_t wtl)
221     {
222     int i;
223    
224     wtl = ezxml_child(wtl, "Material");
225     if (wtl == NULL) {
226     fprintf(stderr, "%s: missing <Material> tag\n", fn);
227     return 0;
228     }
229     for (i = 0; i < nfield_assign; i++) {
230     const char *fnext = field_assignment[i];
231     for ( ; ; ) {
232 greg 2.5 int added = 0;
233 greg 2.1 ezxml_t fld;
234     char sbuf[512];
235     int j;
236    
237     while (isspace(*fnext))
238     ++fnext;
239     if (!*fnext)
240     break;
241 greg 2.3 for (j = 0; *fnext != '=' && !isspace(*fnext); ) {
242 greg 2.1 if (!*fnext | (*fnext == FASEP) |
243     (j >= sizeof(sbuf)-1)) {
244     fprintf(stderr,
245     "%s: bad tag name in assignment '%s'\n",
246     caller, field_assignment[i]);
247     return 0;
248     }
249     sbuf[j++] = *fnext++;
250     }
251 greg 2.2 sbuf[j] = '\0'; /* check known field */
252 greg 2.1 for (j = 0; XMLfieldID[j].nickName[0]; j++)
253 greg 2.2 if (!strcasecmp(sbuf, XMLfieldID[j].nickName) ||
254     !strcasecmp(sbuf, XMLfieldID[j].fullName)) {
255 greg 2.1 strcpy(sbuf, XMLfieldID[j].fullName);
256     break;
257     }
258     /* check if tag exists */
259     fld = ezxml_child(wtl, sbuf);
260     if (fld == NULL) { /* otherwise, create one */
261 greg 2.3 if (!XMLfieldID[j].nickName[0])
262     fprintf(stderr,
263     "%s: warning - adding tag <%s>\n",
264     fn, sbuf);
265 greg 2.5 ezxml_add_txt(wtl, "\t");
266 greg 2.1 fld = ezxml_add_child_d(wtl, sbuf, strlen(wtl->txt));
267 greg 2.5 ++added;
268 greg 2.1 }
269     if (XMLfieldID[j].has_unit)
270     ezxml_set_attr(fld, "unit", attr_unit);
271 greg 2.3 XMLfieldID[j].win_need = 0;
272 greg 2.1 while (isspace(*fnext))
273     ++fnext;
274     if (*fnext++ != '=') {
275     fprintf(stderr,
276     "%s: missing '=' in assignment '%s'\n",
277     caller, field_assignment[i]);
278     return 0;
279     }
280 greg 2.3 for (j = 0; *fnext && *fnext != FASEP; ) {
281 greg 2.1 if (j >= sizeof(sbuf)-1) {
282     fprintf(stderr,
283     "%s: field too long in '%s'\n",
284     caller, field_assignment[i]);
285     return 0;
286     }
287     sbuf[j++] = *fnext++;
288     }
289     sbuf[j] = '\0';
290     ezxml_set_txt_d(fld, sbuf);
291 greg 2.5 if (added)
292     ezxml_add_txt(wtl, "\n\t");
293 greg 2.1 fnext += (*fnext == FASEP);
294     }
295     }
296 greg 2.3 /* check required WINDOW settings */
297     if (xml_input == win6_template)
298     for (i = 0; XMLfieldID[i].nickName[0]; i++)
299     if (XMLfieldID[i].win_need &&
300 greg 2.10 !ezxml_txt(ezxml_child(wtl,XMLfieldID[i].fullName))[0])
301 greg 2.3 fprintf(stderr,
302 greg 2.10 "%s: warning - missing '%s' assignment for WINDOW <%s>\n",
303 greg 2.3 caller, XMLfieldID[i].nickName,
304     XMLfieldID[i].fullName);
305 greg 2.10 return 1;
306 greg 2.1 }
307    
308     /* Complete angle basis specification */
309     static int
310     finish_angle_basis(ezxml_t ab)
311     {
312     const char *bn = ezxml_txt(ezxml_child(ab, "AngleBasisName"));
313     int i, n = nabases;
314     char buf[32];
315    
316     if (!*bn) {
317     fputs("Internal error - missing <AngleBasisName>!\n", stderr);
318     return 0;
319     }
320     while (n-- > 0)
321     if (!strcasecmp(bn, abase_list[n].name))
322     break;
323     if (n < 0) {
324     fprintf(stderr, "Internal error - unknown angle basis '%s'", bn);
325     return 0;
326     }
327     for (i = 0; abase_list[n].lat[i].nphis; i++) {
328     ezxml_t tb, abb = ezxml_add_child(ab, "AngleBasisBlock",
329     strlen(ab->txt));
330     sprintf(buf, "%g", i ?
331     .5*(abase_list[n].lat[i].tmin + abase_list[n].lat[i+1].tmin) :
332     .0);
333 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
334 greg 2.1 ezxml_set_txt_d(ezxml_add_child(abb,"Theta",strlen(abb->txt)), buf);
335     sprintf(buf, "%d", abase_list[n].lat[i].nphis);
336 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
337 greg 2.1 ezxml_set_txt_d(ezxml_add_child(abb,"nPhis",strlen(abb->txt)), buf);
338 greg 2.4 ezxml_add_txt(abb, "\n\t\t\t\t");
339 greg 2.1 tb = ezxml_add_child(abb, "ThetaBounds", strlen(abb->txt));
340 greg 2.4 ezxml_add_txt(tb, "\n\t\t\t\t\t");
341 greg 2.1 sprintf(buf, "%g", abase_list[n].lat[i].tmin);
342 greg 2.4 ezxml_set_txt_d(ezxml_add_child(tb,"LowerTheta",strlen(tb->txt)), buf);
343     ezxml_add_txt(tb, "\n\t\t\t\t\t");
344 greg 2.1 sprintf(buf, "%g", abase_list[n].lat[i+1].tmin);
345 greg 2.4 ezxml_set_txt_d(ezxml_add_child(tb,"UpperTheta",strlen(tb->txt)), buf);
346     ezxml_add_txt(tb, "\n\t\t\t\t");
347     ezxml_add_txt(abb, "\n\t\t\t");
348     ezxml_add_txt(ab, "\n\t\t\t");
349 greg 2.1 }
350     return 1;
351     }
352    
353     /* Determine our angle basis from current tags */
354     static int
355     determine_angle_basis(const char *fn, ezxml_t wtl)
356     {
357     const char *ids;
358     int i;
359    
360     wtl = ezxml_child(wtl, "DataDefinition");
361     if (wtl == NULL)
362     return -1;
363     ids = ezxml_txt(ezxml_child(wtl, "IncidentDataStructure"));
364 greg 2.4 if (!ids[0])
365 greg 2.1 return -1;
366     for (i = 0; i < ABend; i++) {
367     ezxml_t parsed = ezxml_parse_str(basis_definition[i],
368     strlen(basis_definition[i]));
369     int match = 0;
370     if (!strcmp(ids, ezxml_txt(ezxml_child(parsed,
371     "IncidentDataStructure")))) {
372     const char *abn0 = ezxml_txt(
373     ezxml_child(ezxml_child(wtl,
374     "AngleBasis"), "AngleBasisName"));
375     const char *abn1 = ezxml_txt(
376     ezxml_child(ezxml_child(parsed,
377     "AngleBasis"), "AngleBasisName"));
378     match = !strcmp(abn0, abn1);
379     }
380     ezxml_free(parsed);
381     if (match)
382     return i;
383     }
384     return -1;
385     }
386    
387 greg 2.7 /* Filter Klems angle basis, factoring out incident projected solid angle */
388 greg 2.6 static int
389     filter_klems_matrix(FILE *fp)
390     {
391     #define MAX_COLUMNS 145
392 greg 2.7 const char *bn = klems_basis_name[angle_basis];
393 greg 2.6 float col_corr[MAX_COLUMNS];
394     int i, j, n = nabases;
395     /* get angle basis */
396     while (n-- > 0)
397     if (!strcasecmp(bn, abase_list[n].name))
398     break;
399     if (n < 0)
400     return 0;
401     if (abase_list[n].nangles > MAX_COLUMNS) {
402 greg 2.7 fputs("Internal error - too many Klems columns!\n", stderr);
403 greg 2.6 return 0;
404     }
405     /* get correction factors */
406     for (j = abase_list[n].nangles; j--; )
407     col_corr[j] = 1.f / io_getohm(j, &abase_list[n]);
408     /* read/correct/write matrix */
409     for (i = 0; i < abase_list[n].nangles; i++) {
410     for (j = 0; j < abase_list[n].nangles; j++) {
411     double d;
412     if (fscanf(fp, "%lf", &d) != 1)
413     return 0;
414 greg 2.7 if (d < -1e-3) {
415     fputs("Negative BSDF data!\n", stderr);
416     return 0;
417     }
418     printf(" %.3e", d*col_corr[j]*(d > 0));
419 greg 2.6 }
420     fputc('\n', stdout);
421     }
422 greg 2.7 while ((i = getc(fp)) != EOF)
423     if (!isspace(i)) {
424     fputs("Unexpected data past EOF\n", stderr);
425     return 0;
426     }
427     return 1; /* all is good */
428 greg 2.6 #undef MAX_COLUMNS
429     }
430    
431 greg 2.1 /* Write out BSDF data block with surrounding tags */
432     static int
433     writeBSDFblock(const char *caller, struct s_dfile *df)
434     {
435 greg 2.7 int correct_klems = correct_solid_angle;
436 greg 2.1 char *cp;
437    
438     puts("\t<WavelengthData>");
439     puts("\t\t<LayerNumber>System</LayerNumber>");
440     switch (df->spectrum) {
441     case DSvisible:
442     puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
443 greg 2.7 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
444 greg 2.1 puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
445     break;
446     case DSxbar31:
447     puts("\t\t<Wavelength unit=\"Integral\">CIE-X</Wavelength>");
448 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
449 greg 2.1 puts("\t\t<DetectorSpectrum>ASTM E308 1931 X.dsp</DetectorSpectrum>");
450     break;
451     case DSzbar31:
452     puts("\t\t<Wavelength unit=\"Integral\">CIE-Z</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 Z.dsp</DetectorSpectrum>");
455     break;
456 greg 2.11 case DSuprime:
457 greg 2.13 puts("\t\t<Wavelength unit=\"Integral\">CIE-u</Wavelength>");
458 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
459 greg 2.11 break;
460     case DSvprime:
461 greg 2.13 puts("\t\t<Wavelength unit=\"Integral\">CIE-v</Wavelength>");
462 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
463 greg 2.11 break;
464 greg 2.1 case DSsolar:
465     puts("\t\t<Wavelength unit=\"Integral\">Solar</Wavelength>");
466 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
467 greg 2.1 puts("\t\t<DetectorSpectrum>None</DetectorSpectrum>");
468     break;
469     case DSnir:
470     puts("\t\t<Wavelength unit=\"Integral\">NIR</Wavelength>");
471 greg 2.14 puts("\t\t<SourceSpectrum>PLACE_HOLDER</SourceSpectrum>");
472 greg 2.1 puts("\t\t<DetectorSpectrum>PLACE_HOLDER</DetectorSpectrum>");
473     break;
474     default:
475     cp = strrchr(spectr_file[df->spectrum], '.');
476     if (cp != NULL)
477     *cp = '\0';
478     printf("\t\t<Wavelength unit=\"Integral\">%s</Wavelength>\n",
479     spectr_file[df->spectrum]);
480     if (cp != NULL)
481     *cp = '.';
482 greg 2.14 puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
483 greg 2.1 printf("\t\t<DetectorSpectrum>%s</DetectorSpectrum>\n",
484     spectr_file[df->spectrum]);
485     break;
486     }
487     puts("\t\t<WavelengthDataBlock>");
488     fputs("\t\t\t<WavelengthDataDirection>", stdout);
489     switch (df->type) {
490     case DTtransForward:
491     fputs("Transmission Front", stdout);
492     break;
493     case DTtransBackward:
494     fputs("Transmission Back", stdout);
495     break;
496     case DTreflForward:
497     fputs("Reflection Front", stdout);
498     break;
499     case DTreflBackward:
500     fputs("Reflection Back", stdout);
501     break;
502     default:
503     fprintf(stderr, "%s: internal - bad BSDF type (%d)\n", caller, df->type);
504     return 0;
505     }
506     puts("</WavelengthDataDirection>");
507     switch (angle_basis) {
508     case ABklemsFull:
509     case ABklemsHalf:
510     case ABklemsQuarter:
511 greg 2.7 fputs("\t\t\t<ColumnAngleBasis>", stdout);
512     fputs(klems_basis_name[angle_basis], stdout);
513     puts("</ColumnAngleBasis>");
514     fputs("\t\t\t<RowAngleBasis>", stdout);
515     fputs(klems_basis_name[angle_basis], stdout);
516     puts("</RowAngleBasis>");
517 greg 2.1 break;
518     case ABtensorTree3:
519     case ABtensorTree4:
520     puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
521 greg 2.7 correct_klems = 0;
522 greg 2.1 break;
523     default:
524     fprintf(stderr, "%s: bad angle basis (%d)\n", caller, angle_basis);
525     return 0;
526     }
527     puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
528     puts("\t\t\t<ScatteringData>");
529     fflush(stdout);
530 greg 2.7 if (correct_klems) { /* correct Klems matrix data */
531 greg 2.6 FILE *fp = stdin;
532     if (df->fname[0] == '!')
533     fp = popen(df->fname+1, "r");
534     else if (df->fname != stdin_name)
535     fp = fopen(df->fname, "r");
536     if (fp == NULL) {
537     fprintf(stderr, "%s: cannot open '%s'\n",
538     caller, df->fname);
539     return 0;
540     }
541     if (!filter_klems_matrix(fp)) {
542     fprintf(stderr, "%s: Klems data error from '%s'\n",
543     caller, df->fname);
544     return 0;
545     }
546     if (df->fname[0] != '!') {
547     fclose(fp);
548     } else if (pclose(fp)) {
549     fprintf(stderr, "%s: error running '%s'\n",
550     caller, df->fname);
551     return 0;
552     }
553     } else if (df->fname == stdin_name) {
554 greg 2.1 copy_and_close(fileno(stdin));
555 greg 2.2 } else if (df->fname[0] != '!') {
556 greg 2.1 if (!copy_and_close(open(df->fname, O_RDONLY))) {
557     fprintf(stderr, "%s: error reading from '%s'\n",
558     caller, df->fname);
559     return 0;
560     }
561     } else if (system(df->fname+1)) {
562 greg 2.2 fprintf(stderr, "%s: error running '%s'\n", caller, df->fname);
563 greg 2.1 return 0;
564     }
565     puts("\t\t\t</ScatteringData>");
566     puts("\t\t</WavelengthDataBlock>");
567     puts("\t</WavelengthData>");
568     return 1;
569     }
570    
571     /* Write out XML, interpolating BSDF data block(s) */
572     static int
573     writeBSDF(const char *caller, ezxml_t fl)
574     {
575 greg 2.2 char *xml = ezxml_toxml(fl); /* store XML in string */
576 greg 2.1 int ei, i;
577     /* locate trailer */
578     for (ei = strlen(xml)-strlen("</Layer></Optical></WindowElement>");
579     ei >= 0; ei--)
580     if (!strncmp(xml+ei, "</Layer>", 8))
581     break;
582     if (ei < 0) {
583     fprintf(stderr, "%s: internal - cannot find trailer\n",
584     caller);
585     free(xml);
586     return 0;
587     }
588 greg 2.15 puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
589 greg 2.1 fflush(stdout); /* write previous XML info. */
590     if (write(fileno(stdout), xml, ei) != ei) {
591     free(xml);
592     return 0;
593     }
594     for (i = 0; i < ndataf; i++) /* interpolate new data */
595     if (!writeBSDFblock(caller, &data_file[i])) {
596     free(xml);
597     return 0;
598     }
599     fputs(xml+ei, stdout); /* write trailer */
600 greg 2.2 free(xml); /* free string */
601 greg 2.4 fputc('\n', stdout);
602 greg 2.1 return (fflush(stdout) == 0);
603     }
604    
605     /* Insert BSDF data into XML wrapper */
606     static int
607     wrapBSDF(const char *caller)
608     {
609 greg 2.2 const char *xml_path = xml_input;
610 greg 2.1 ezxml_t fl, wtl;
611     /* load previous XML/template */
612 greg 2.2 if (xml_input == stdin_name) {
613     fl = ezxml_parse_fp(stdin);
614     } else if (xml_input[0] == '!') {
615     FILE *pfp = popen(xml_input+1, "r");
616     if (pfp == NULL) {
617     fprintf(stderr, "%s: cannot start process '%s'\n",
618     caller, xml_input);
619     return 0;
620     }
621     fl = ezxml_parse_fp(pfp);
622     if (pclose(pfp)) {
623     fprintf(stderr, "%s: error running '%s'\n",
624     caller, xml_input);
625     return 0;
626     }
627     } else {
628     xml_path = getpath((char *)xml_input, getrlibpath(), R_OK);
629     if (xml_path == NULL) {
630     fprintf(stderr, "%s: cannot find XML file named '%s'\n",
631     caller, xml_input==NULL ? "NULL" : xml_input);
632     return 0;
633     }
634     fl = ezxml_parse_file(xml_path);
635 greg 2.1 }
636     if (fl == NULL) {
637 greg 2.2 fprintf(stderr, "%s: cannot load XML '%s'\n", caller, xml_path);
638 greg 2.1 return 0;
639     }
640     if (ezxml_error(fl)[0]) {
641 greg 2.2 fprintf(stderr, "%s: error in XML '%s': %s\n", caller, xml_path,
642 greg 2.1 ezxml_error(fl));
643     goto failure;
644     }
645     if (strcmp(ezxml_name(fl), top_level_name)) {
646     fprintf(stderr, "%s: top level in XML '%s' not '%s'\n",
647     caller, xml_path, top_level_name);
648     goto failure;
649     }
650     wtl = ezxml_child(fl, "FileType");
651     if (wtl != NULL && strcmp(ezxml_txt(wtl), "BSDF")) {
652     fprintf(stderr, "%s: wrong FileType in XML '%s' (must be 'BSDF')",
653     caller, xml_path);
654     goto failure;
655     }
656     wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer");
657     if (wtl == NULL) {
658     fprintf(stderr, "%s: no optical layers in XML '%s'",
659     caller, xml_path);
660     goto failure;
661     }
662     /* make material assignments */
663 greg 2.3 if (!mat_assignments(caller, xml_path, wtl))
664 greg 2.1 goto failure;
665     if (mgf_geometry != NULL) { /* add geometry if specified */
666     ezxml_t geom = ezxml_child(wtl, "Geometry");
667     if (geom == NULL)
668 greg 2.3 geom = ezxml_add_child(wtl, "Geometry", strlen(wtl->txt));
669 greg 2.1 ezxml_set_attr(geom, "format", "MGF");
670     geom = ezxml_child(geom, "MGFblock");
671     if (geom == NULL) {
672     geom = ezxml_child(wtl, "Geometry");
673 greg 2.3 geom = ezxml_add_child(geom, "MGFblock", 0);
674 greg 2.1 }
675     ezxml_set_attr(geom, "unit", attr_unit);
676     ezxml_set_txt(geom, input2str(mgf_geometry));
677     if (geom->txt[0])
678     ezxml_set_flag(geom, EZXML_TXTM);
679     }
680     /* check basis */
681     if (angle_basis != ABdefault) {
682 greg 2.4 size_t offset = 0;
683 greg 2.1 ezxml_t ab, dd = ezxml_child(wtl, "DataDefinition");
684 greg 2.4 if (dd != NULL) {
685     offset = dd->off;
686 greg 2.5 if (dd->child != NULL)
687     fprintf(stderr,
688 greg 2.1 "%s: warning - replacing existing <DataDefinition> in '%s'\n",
689     caller, xml_path);
690 greg 2.4 ezxml_remove(dd);
691     } else
692     offset = strlen(wtl->txt);
693     dd = ezxml_insert(ezxml_parse_str(basis_definition[angle_basis],
694 greg 2.1 strlen(basis_definition[angle_basis])),
695 greg 2.4 wtl, offset);
696 greg 2.1 if ((ab = ezxml_child(dd, "AngleBasis")) != NULL &&
697     !finish_angle_basis(ab))
698     goto failure;
699     } else if ((angle_basis = determine_angle_basis(xml_path, wtl)) < 0) {
700     fprintf(stderr, "%s: need -a option to set angle basis\n",
701     caller);
702     goto failure;
703     }
704     /* write & add BSDF data blocks */
705     if (!writeBSDF(caller, fl))
706     goto failure;
707     ezxml_free(fl); /* all done */
708     return 1;
709     failure:
710     ezxml_free(fl);
711     return 0;
712     }
713    
714     /* Report usage and exit */
715     static void
716     UsageExit(const char *pname)
717     {
718     fputs("Usage: ", stderr);
719     fputs(pname, stderr);
720 greg 2.11 fputs(" [-W][-c][-a {kf|kh|kq|t3|t4}][-u unit][-g geom][-f 'x=string;y=string']", stderr);
721 greg 2.2 fputs(" [-s spectr][-tb inp][-tf inp][-rb inp][-rf inp]", stderr);
722     fputs(" [input.xml]\n", stderr);
723 greg 2.1 exit(1);
724     }
725    
726     /* Load XML file and use to wrap BSDF data (or modify fields) */
727     int
728     main(int argc, char *argv[])
729     {
730     int cur_spectrum = DSvisible;
731     int ncust_spec = 0;
732     int used_stdin = 0;
733     int units_set = 0;
734     int i;
735     /* get/check arguments */
736     for (i = 1; i < argc && argv[i][0] == '-'; i++) {
737     switch (argv[i][1]) {
738     case 'W': /* customize for WINDOW 6 output */
739     xml_input = win6_template;
740     continue;
741     case 'f': /* field assignment(s) */
742     if (++i >= argc)
743     UsageExit(argv[0]);
744     if (nfield_assign >= MAXASSIGN) {
745     fprintf(stderr, "%s: too many -f options",
746     argv[0]);
747     return 1;
748     }
749     field_assignment[nfield_assign++] = argv[i];
750     continue;
751     case 'u': /* unit */
752     if (++i >= argc)
753     UsageExit(argv[0]);
754     if (units_set++) {
755     fprintf(stderr, "%s: only one -u option allowed\n",
756     argv[0]);
757     return 1;
758     }
759 greg 2.2 if (strstr(legal_units, argv[i]) == NULL) {
760     fprintf(stderr, "%s: -u unit must be one of (%s)\n",
761 greg 2.1 argv[0], legal_units);
762     return 1;
763     }
764     attr_unit = argv[i];
765     continue;
766     case 'a': /* angle basis */
767     if (++i >= argc)
768     UsageExit(argv[0]);
769     if (angle_basis != ABdefault) {
770     fprintf(stderr, "%s: only one -a option allowed\n",
771     argv[0]);
772     return 1;
773     }
774     if (!strcasecmp(argv[i], "kf"))
775     angle_basis = ABklemsFull;
776     else if (!strcasecmp(argv[i], "kh"))
777     angle_basis = ABklemsHalf;
778     else if (!strcasecmp(argv[i], "kq"))
779     angle_basis = ABklemsQuarter;
780     else if (!strcasecmp(argv[i], "t3"))
781     angle_basis = ABtensorTree3;
782     else if (!strcasecmp(argv[i], "t4"))
783     angle_basis = ABtensorTree4;
784     else
785     UsageExit(argv[0]);
786     continue;
787 greg 2.7 case 'c': /* correct solid angle */
788 greg 2.9 correct_solid_angle = 1;
789 greg 2.7 continue;
790 greg 2.1 case 't': /* transmission */
791     if (i >= argc-1)
792     UsageExit(argv[0]);
793     if (ndataf >= MAXFILES) {
794     fprintf(stderr, "%s: too many data files\n",
795     argv[0]);
796     return 1;
797     }
798     if (!strcmp(argv[i], "-tf"))
799     data_file[ndataf].type = DTtransForward;
800     else if (!strcmp(argv[i], "-tb"))
801     data_file[ndataf].type = DTtransBackward;
802     else
803     UsageExit(argv[0]);
804     if (!strcmp(argv[++i], "-")) {
805     if (used_stdin++) UsageExit(argv[i]);
806     argv[i] = (char *)stdin_name;
807     }
808     data_file[ndataf].fname = argv[i];
809     data_file[ndataf].spectrum = cur_spectrum;
810     ndataf++;
811     continue;
812     case 'r': /* reflection */
813     if (i >= argc-1)
814     UsageExit(argv[0]);
815     if (ndataf >= MAXFILES) {
816     fprintf(stderr, "%s: too many data files\n",
817     argv[0]);
818     return 1;
819     }
820     if (!strcmp(argv[i], "-rf"))
821     data_file[ndataf].type = DTreflForward;
822     else if (!strcmp(argv[i], "-rb"))
823     data_file[ndataf].type = DTreflBackward;
824     else
825     UsageExit(argv[0]);
826     if (!strcmp(argv[++i], "-")) {
827     if (used_stdin++) UsageExit(argv[i]);
828     argv[i] = (char *)stdin_name;
829     }
830     data_file[ndataf].fname = argv[i];
831 greg 2.8 data_file[ndataf].spectrum = cur_spectrum;
832     ndataf++;
833 greg 2.1 continue;
834     case 's': /* spectrum name or input file */
835     if (++i >= argc)
836     UsageExit(argv[0]);
837     if (!strcasecmp(argv[i], "Solar"))
838     cur_spectrum = DSsolar;
839     else if (!strcasecmp(argv[i], "Visible") ||
840     !strcasecmp(argv[i], "CIE-Y"))
841     cur_spectrum = DSvisible;
842     else if (!strcasecmp(argv[i], "CIE-X"))
843     cur_spectrum = DSxbar31;
844     else if (!strcasecmp(argv[i], "CIE-Z"))
845     cur_spectrum = DSzbar31;
846 greg 2.11 else if (!strcasecmp(argv[i], "CIE-u"))
847     cur_spectrum = DSuprime;
848     else if (!strcasecmp(argv[i], "CIE-v"))
849     cur_spectrum = DSvprime;
850 greg 2.1 else if (!strcasecmp(argv[i], "NIR"))
851     cur_spectrum = DSnir;
852     else {
853     if (!strcmp(argv[i], "-")) {
854     fprintf(stderr,
855     "%s: cannot read spectra from stdin",
856     argv[0]);
857     return 1;
858     }
859     cur_spectrum = ncust_spec;
860     spectr_file[ncust_spec++] = argv[i];
861     }
862     continue;
863     case 'g': /* MGF geometry file */
864     if (i >= argc-1)
865     UsageExit(argv[0]);
866     if (mgf_geometry != NULL) {
867     fprintf(stderr, "%s: only one -g option allowed\n",
868     argv[0]);
869     return 1;
870     }
871     if (!strcmp(argv[++i], "-")) {
872     if (used_stdin++) UsageExit(argv[i]);
873     argv[i] = (char *)stdin_name;
874     }
875     mgf_geometry = argv[i];
876     continue;
877     case '\0': /* input XML from stdin */
878     break;
879     default:
880     UsageExit(argv[0]);
881     break;
882     }
883     break;
884     }
885     doneOptions: /* get XML input */
886     if (i >= argc) {
887     if (xml_input == NULL)
888     xml_input = def_template;
889     } else if ((i < argc-1) | (xml_input != NULL)) {
890     fprintf(stderr, "%s: only one XML input allowed\n", argv[0]);
891     UsageExit(argv[0]);
892     } else if (!strcmp(argv[i], "-")) {
893     if (used_stdin++) UsageExit(argv[0]);
894     xml_input = stdin_name;
895     } else {
896     xml_input = argv[i];
897     }
898     /* wrap it! */
899     return !wrapBSDF(argv[0]);
900     }