src/util/wrapBSDF.c

#ifndef lint
static const char RCSid[] = "$Id: wrapBSDF.c,v 2.13 2015/03/25 22:50:48 greg Exp $";
#endif
/*
 * Wrap BSDF data in valid WINDOW XML file
 *
 *      G. Ward         February 2015
 */

#include <ctype.h>
#include "rtio.h"
#include "rtprocess.h"
#include "ezxml.h"
#include "bsdf.h"
#include "bsdf_m.h"
                                        /* XML template file names */
const char      def_template[] = "minimalBSDFt.xml";
const char      win6_template[] = "WINDOW6BSDFt.xml";

const char      stdin_name[] = "<stdin>";
                                        /* input files (can be stdin_name) */
const char      *xml_input = NULL;
                                        /* unit for materials & geometry */
const char      *attr_unit = "meter";
const char      legal_units[] = "meter|foot|inch|centimeter|millimeter";
                                        /* system materials & geometry */
const char      *mgf_geometry = NULL;

                                        /* angle bases */
enum { ABdefault=-1, ABklemsFull=0, ABklemsHalf, ABklemsQuarter,
                ABtensorTree3, ABtensorTree4, ABend };

int             angle_basis = ABdefault;

int             correct_solid_angle = 0;

const char      *klems_basis_name[] = {
        "LBNL/Klems Full",
        "LBNL/Klems Half",
        "LBNL/Klems Quarter",
};
                                        /* field IDs and nicknames */
struct s_fieldID {
        char            nickName[4];
        short           has_unit;
        short           win_need;
        const char      *fullName;
} XMLfieldID[] = {
        {"m", 0, 1, "Manufacturer"},
        {"n", 0, 1, "Name"},
        {"c", 0, 0, "ThermalConductivity"},
        {"ef", 0, 0, "EmissivityFront"},
        {"eb", 0, 0, "EmissivityBack"},
        {"tir", 0, 0, "TIR"},
        {"eo", 0, 0, "EffectiveOpennessFraction"},
        {"t", 1, 1, "Thickness"},
        {"h", 1, 0, "Height"},
        {"w", 1, 0, "Width"},
        {"\0", 0, 0, NULL}      /* terminator */
};
                                        /* field assignments */
#define MAXASSIGN       12
const char      *field_assignment[MAXASSIGN];
int             nfield_assign = 0;
#define FASEP   ';'
                                        /* data file(s) & spectra */
enum { DTtransForward, DTtransBackward, DTreflForward, DTreflBackward };

enum { DSsolar=-1, DSnir=-2, DSxbar31=-3, DSvisible=-4, DSzbar31=-5,
        DSuprime=-6, DSvprime=-7 };

#define MAXFILES        20

struct s_dfile {
        const char      *fname;         /* input data file name */
        short           type;           /* BSDF data type */
        short           spectrum;       /* BSDF sensor spectrum */
} data_file[MAXFILES];

int             ndataf = 0;             /* number of data files */

const char      *spectr_file[MAXFILES]; /* custom spectral curve input */

const char      top_level_name[] = "WindowElement";

static char     basis_definition[][256] = {

        "\t<DataDefinition>\n"
        "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
        "\t\t<AngleBasis>\n"
        "\t\t\t<AngleBasisName>LBNL/Klems Full</AngleBasisName>\n"
        "\t\t\t</AngleBasis>\n"
        "\t</DataDefinition>\n",

        "\t<DataDefinition>\n"
        "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
        "\t\t<AngleBasis>\n"
        "\t\t\t<AngleBasisName>LBNL/Klems Half</AngleBasisName>\n"
        "\t\t\t</AngleBasis>\n"
        "\t</DataDefinition>\n",

        "\t<DataDefinition>\n"
        "\t\t<IncidentDataStructure>Columns</IncidentDataStructure>\n"
        "\t\t<AngleBasis>\n"
        "\t\t\t<AngleBasisName>LBNL/Klems Quarter</AngleBasisName>\n"
        "\t\t\t</AngleBasis>\n"
        "\t</DataDefinition>\n",

        "\t<DataDefinition>\n"
        "\t\t<IncidentDataStructure>TensorTree3</IncidentDataStructure>\n"
        "\t</DataDefinition>\n",

        "\t<DataDefinition>\n"
        "\t\t<IncidentDataStructure>TensorTree4</IncidentDataStructure>\n"
        "\t</DataDefinition>\n",
};

/* Copy data from file descriptor to stdout and close */
static int
copy_and_close(int fd)
{
        int     ok = 1;
        char    buf[8192];
        int     n;

        if (fd < 0)
                return 0;
        while ((n = read(fd, buf, sizeof(buf))) > 0)
                if (write(fileno(stdout), buf, n) != n) {
                        ok = 0;
                        break;
                }
        ok &= (n == 0);
        close(fd);
        return ok;
}

/* Allocate and assign string from file or stream */
static char *
input2str(const char *inpspec)
{
        FILE    *fp = NULL;
        char    *str;
        int     len, pos, n;

        if (inpspec == NULL || !*inpspec)
                return "";
        if (inpspec == stdin_name) {            /* read from stdin */
                fp = stdin;
        } else if (inpspec[0] == '!') {         /* read from command */
                fp = popen(inpspec+1, "r");
                if (fp == NULL) {
                        fprintf(stderr, "Cannot start process '%s'\n",
                                        inpspec);
                        return "";
                }
        } else {                                /* else load file */
                int     fd = open(inpspec, O_RDONLY);
                if (fd < 0) {
                        fprintf(stderr, "%s: cannot open\n", inpspec);
                        return "";
                }
#ifndef _WIN32                          /* XXX somehow broken on Windows */
                len = lseek(fd, 0L, SEEK_END);
                if (len > 0) {
                        lseek(fd, 0L, SEEK_SET);
                        str = (char *)malloc(len+1);
                        if (str == NULL) {
                                close(fd);
                                goto memerr;
                        }
                        if (read(fd, str, len) != len) {
                                fprintf(stderr, "%s: read error\n", inpspec);
                                free(str);
                                close(fd);
                                return "";
                        }
                        str[len] = '\0';
                        close(fd);
                        return str;
                }
#endif
                fp = fdopen(fd, "r");           /* not a regular file */
        }
                                                /* reading from stream */
        str = (char *)malloc((len=8192)+1);
        if (str == NULL)
                goto memerr;
        pos = 0;
        while ((n = read(fileno(fp), str+pos, len-pos)) > 0)
                if ((pos += n) >= len) {        /* need more space? */
                        str = (char *)realloc(str, (len += len>>2) + 1);
                        if (str == NULL)
                                goto memerr;
                }
        if (n < 0) {
                fprintf(stderr, "%s: read error\n", inpspec);
                free(str);
                str = "";
        } else {                                /* tidy up result */
                str[pos] = '\0';
                str = (char *)realloc(str, (len=pos)+1);
                if (str == NULL)
                        goto memerr;
        }
        if (inpspec[0] != '!')
                fclose(fp);
        else if (pclose(fp))
                fprintf(stderr, "Error running command '%s'\n", inpspec);
        return str;
memerr:
        fprintf(stderr, "%s: error allocating memory\n", inpspec);
        if (fp != NULL)
                (inpspec[0] == '!') ? pclose(fp) : fclose(fp);
        return "";
}

/* Make material assignments in field_assignment to XML fields */
static int
mat_assignments(const char *caller, const char *fn, ezxml_t wtl)
{
        int     i;

        wtl = ezxml_child(wtl, "Material");
        if (wtl == NULL) {
                fprintf(stderr, "%s: missing <Material> tag\n", fn);
                return 0;
        }
        for (i = 0; i < nfield_assign; i++) {
                const char      *fnext = field_assignment[i];
                for ( ; ; ) {
                        int     added = 0;
                        ezxml_t fld;
                        char    sbuf[512];
                        int     j;

                        while (isspace(*fnext))
                                ++fnext;
                        if (!*fnext)
                                break;
                        for (j = 0; *fnext != '=' && !isspace(*fnext); ) {
                                if (!*fnext | (*fnext == FASEP) |
                                                (j >= sizeof(sbuf)-1)) {
                                        fprintf(stderr,
                                        "%s: bad tag name in assignment '%s'\n",
                                                caller, field_assignment[i]);
                                        return 0;
                                }
                                sbuf[j++] = *fnext++;
                        }
                        sbuf[j] = '\0';         /* check known field */
                        for (j = 0; XMLfieldID[j].nickName[0]; j++)
                                if (!strcasecmp(sbuf, XMLfieldID[j].nickName) ||
                                        !strcasecmp(sbuf, XMLfieldID[j].fullName)) {
                                        strcpy(sbuf, XMLfieldID[j].fullName);
                                        break;
                                }
                                                /* check if tag exists */
                        fld = ezxml_child(wtl, sbuf);
                        if (fld == NULL) {      /* otherwise, create one */
                                if (!XMLfieldID[j].nickName[0])
                                        fprintf(stderr,
                                                "%s: warning - adding tag <%s>\n",
                                                        fn, sbuf);
                                ezxml_add_txt(wtl, "\t");
                                fld = ezxml_add_child_d(wtl, sbuf, strlen(wtl->txt));
                                ++added;
                        }
                        if (XMLfieldID[j].has_unit)
                                ezxml_set_attr(fld, "unit", attr_unit);
                        XMLfieldID[j].win_need = 0;
                        while (isspace(*fnext))
                                ++fnext;
                        if (*fnext++ != '=') {
                                fprintf(stderr,
                                        "%s: missing '=' in assignment '%s'\n",
                                                caller, field_assignment[i]);
                                return 0;
                        }
                        for (j = 0; *fnext && *fnext != FASEP; ) {
                                if (j >= sizeof(sbuf)-1) {
                                        fprintf(stderr,
                                        "%s: field too long in '%s'\n",
                                                caller, field_assignment[i]);
                                        return 0;
                                }
                                sbuf[j++] = *fnext++;
                        }
                        sbuf[j] = '\0';
                        ezxml_set_txt_d(fld, sbuf);
                        if (added)
                                ezxml_add_txt(wtl, "\n\t");
                        fnext += (*fnext == FASEP);
                }
        }
                                        /* check required WINDOW settings */
        if (xml_input == win6_template)
            for (i = 0; XMLfieldID[i].nickName[0]; i++)
                if (XMLfieldID[i].win_need &&
                        !ezxml_txt(ezxml_child(wtl,XMLfieldID[i].fullName))[0])
                        fprintf(stderr,
                        "%s: warning - missing '%s' assignment for WINDOW <%s>\n",
                                        caller, XMLfieldID[i].nickName,
                                        XMLfieldID[i].fullName);
        return 1;
}

/* Complete angle basis specification */
static int
finish_angle_basis(ezxml_t ab)
{
        const char      *bn = ezxml_txt(ezxml_child(ab, "AngleBasisName"));
        int             i, n = nabases;
        char            buf[32];

        if (!*bn) {
                fputs("Internal error - missing <AngleBasisName>!\n", stderr);
                return 0;
        }
        while (n-- > 0)
                if (!strcasecmp(bn, abase_list[n].name))
                        break;
        if (n < 0) {
                fprintf(stderr, "Internal error - unknown angle basis '%s'", bn);
                return 0;
        }
        for (i = 0; abase_list[n].lat[i].nphis; i++) {
                ezxml_t tb, abb = ezxml_add_child(ab, "AngleBasisBlock",
                                                strlen(ab->txt));
                sprintf(buf, "%g", i ?
                .5*(abase_list[n].lat[i].tmin + abase_list[n].lat[i+1].tmin) :
                                .0);
                ezxml_add_txt(abb, "\n\t\t\t\t");
                ezxml_set_txt_d(ezxml_add_child(abb,"Theta",strlen(abb->txt)), buf);
                sprintf(buf, "%d", abase_list[n].lat[i].nphis);
                ezxml_add_txt(abb, "\n\t\t\t\t");
                ezxml_set_txt_d(ezxml_add_child(abb,"nPhis",strlen(abb->txt)), buf);
                ezxml_add_txt(abb, "\n\t\t\t\t");
                tb = ezxml_add_child(abb, "ThetaBounds", strlen(abb->txt));
                ezxml_add_txt(tb, "\n\t\t\t\t\t");
                sprintf(buf, "%g", abase_list[n].lat[i].tmin);
                ezxml_set_txt_d(ezxml_add_child(tb,"LowerTheta",strlen(tb->txt)), buf);
                ezxml_add_txt(tb, "\n\t\t\t\t\t");
                sprintf(buf, "%g", abase_list[n].lat[i+1].tmin);
                ezxml_set_txt_d(ezxml_add_child(tb,"UpperTheta",strlen(tb->txt)), buf);
                ezxml_add_txt(tb, "\n\t\t\t\t");
                ezxml_add_txt(abb, "\n\t\t\t");
                ezxml_add_txt(ab, "\n\t\t\t");
        }
        return 1;
}

/* Determine our angle basis from current tags */
static int
determine_angle_basis(const char *fn, ezxml_t wtl)
{
        const char      *ids;
        int             i;

        wtl = ezxml_child(wtl, "DataDefinition");
        if (wtl == NULL)
                return -1;
        ids = ezxml_txt(ezxml_child(wtl, "IncidentDataStructure"));
        if (!ids[0])
                return -1;
        for (i = 0; i < ABend; i++) {
                ezxml_t parsed = ezxml_parse_str(basis_definition[i],
                                        strlen(basis_definition[i]));
                int     match = 0;
                if (!strcmp(ids, ezxml_txt(ezxml_child(parsed,
                                        "IncidentDataStructure")))) {
                        const char      *abn0 = ezxml_txt(
                                        ezxml_child(ezxml_child(wtl,
                                        "AngleBasis"), "AngleBasisName"));
                        const char      *abn1 = ezxml_txt(
                                        ezxml_child(ezxml_child(parsed,
                                        "AngleBasis"), "AngleBasisName"));
                        match = !strcmp(abn0, abn1);
                }
                ezxml_free(parsed);
                if (match)
                        return i;
        }
        return -1;
}

/* Filter Klems angle basis, factoring out incident projected solid angle */
static int
filter_klems_matrix(FILE *fp)
{
#define MAX_COLUMNS     145
        const char      *bn = klems_basis_name[angle_basis];
        float           col_corr[MAX_COLUMNS];
        int             i, j, n = nabases;
                                        /* get angle basis */
        while (n-- > 0)
                if (!strcasecmp(bn, abase_list[n].name))
                        break;
        if (n < 0)
                return 0;
        if (abase_list[n].nangles > MAX_COLUMNS) {
                fputs("Internal error - too many Klems columns!\n", stderr);
                return 0;
        }
                                        /* get correction factors */
        for (j = abase_list[n].nangles; j--; )
                col_corr[j] = 1.f / io_getohm(j, &abase_list[n]);
                                        /* read/correct/write matrix */
        for (i = 0; i < abase_list[n].nangles; i++) {
            for (j = 0; j < abase_list[n].nangles; j++) {
                double  d;
                if (fscanf(fp, "%lf", &d) != 1)
                        return 0;
                if (d < -1e-3) {
                        fputs("Negative BSDF data!\n", stderr);
                        return 0;
                }
                printf(" %.3e", d*col_corr[j]*(d > 0));
            }
            fputc('\n', stdout);
        }
        while ((i = getc(fp)) != EOF)
                if (!isspace(i)) {
                        fputs("Unexpected data past EOF\n", stderr);
                        return 0;
                }
        return 1;                       /* all is good */
#undef MAX_COLUMNS
}

/* Write out BSDF data block with surrounding tags */
static int
writeBSDFblock(const char *caller, struct s_dfile *df)
{
        int     correct_klems = correct_solid_angle;
        char    *cp;

        puts("\t<WavelengthData>");
        puts("\t\t<LayerNumber>System</LayerNumber>");
        switch (df->spectrum) {
        case DSvisible:
                puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
                break;
        case DSxbar31:
                puts("\t\t<Wavelength unit=\"Integral\">CIE-X</Wavelength>");
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                puts("\t\t<DetectorSpectrum>ASTM E308 1931 X.dsp</DetectorSpectrum>");
                break;
        case DSzbar31:
                puts("\t\t<Wavelength unit=\"Integral\">CIE-Z</Wavelength>");
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                puts("\t\t<DetectorSpectrum>ASTM E308 1931 Z.dsp</DetectorSpectrum>");
                break;
        case DSuprime:
                puts("\t\t<Wavelength unit=\"Integral\">CIE-u</Wavelength>");
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                break;
        case DSvprime:
                puts("\t\t<Wavelength unit=\"Integral\">CIE-v</Wavelength>");
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                break;
        case DSsolar:
                puts("\t\t<Wavelength unit=\"Integral\">Solar</Wavelength>");
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                puts("\t\t<DetectorSpectrum>None</DetectorSpectrum>");
                break;
        case DSnir:
                puts("\t\t<Wavelength unit=\"Integral\">NIR</Wavelength>");
                puts("\t\t<SourceSpectrum>PLACE_HOLDER</SourceSpectrum>");
                puts("\t\t<DetectorSpectrum>PLACE_HOLDER</DetectorSpectrum>");
                break;
        default:
                cp = strrchr(spectr_file[df->spectrum], '.');
                if (cp != NULL)
                        *cp = '\0';
                printf("\t\t<Wavelength unit=\"Integral\">%s</Wavelength>\n",
                                spectr_file[df->spectrum]);
                if (cp != NULL)
                        *cp = '.';
                puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
                printf("\t\t<DetectorSpectrum>%s</DetectorSpectrum>\n",
                                spectr_file[df->spectrum]);
                break;
        }
        puts("\t\t<WavelengthDataBlock>");
        fputs("\t\t\t<WavelengthDataDirection>", stdout);
        switch (df->type) {
        case DTtransForward:
                fputs("Transmission Front", stdout);
                break;
        case DTtransBackward:
                fputs("Transmission Back", stdout);
                break;
        case DTreflForward:
                fputs("Reflection Front", stdout);
                break;
        case DTreflBackward:
                fputs("Reflection Back", stdout);
                break;
        default:
                fprintf(stderr, "%s: internal - bad BSDF type (%d)\n", caller, df->type);
                return 0;
        }
        puts("</WavelengthDataDirection>");
        switch (angle_basis) {
        case ABklemsFull:
        case ABklemsHalf:
        case ABklemsQuarter:
                fputs("\t\t\t<ColumnAngleBasis>", stdout);
                fputs(klems_basis_name[angle_basis], stdout);
                puts("</ColumnAngleBasis>");
                fputs("\t\t\t<RowAngleBasis>", stdout);
                fputs(klems_basis_name[angle_basis], stdout);
                puts("</RowAngleBasis>");
                break;
        case ABtensorTree3:
        case ABtensorTree4:
                puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
                correct_klems = 0;
                break;
        default:
                fprintf(stderr, "%s: bad angle basis (%d)\n", caller, angle_basis);
                return 0;
        }
        puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
        puts("\t\t\t<ScatteringData>");
        fflush(stdout);
        if (correct_klems) {                    /* correct Klems matrix data */
                FILE    *fp = stdin;
                if (df->fname[0] == '!')
                        fp = popen(df->fname+1, "r");
                else if (df->fname != stdin_name)
                        fp = fopen(df->fname, "r");
                if (fp == NULL) {
                        fprintf(stderr, "%s: cannot open '%s'\n",
                                        caller, df->fname);
                        return 0;
                }
                if (!filter_klems_matrix(fp)) {
                        fprintf(stderr, "%s: Klems data error from '%s'\n",
                                        caller, df->fname);
                        return 0;
                }
                if (df->fname[0] != '!') {
                        fclose(fp);
                } else if (pclose(fp)) {
                        fprintf(stderr, "%s: error running '%s'\n",
                                        caller, df->fname);
                        return 0;
                }
        } else if (df->fname == stdin_name) {
                copy_and_close(fileno(stdin));
        } else if (df->fname[0] != '!') {
                if (!copy_and_close(open(df->fname, O_RDONLY))) {
                        fprintf(stderr, "%s: error reading from '%s'\n",
                                        caller, df->fname);
                        return 0;
                }
        } else if (system(df->fname+1)) {
                fprintf(stderr, "%s: error running '%s'\n", caller, df->fname);
                return 0;
        }
        puts("\t\t\t</ScatteringData>");
        puts("\t\t</WavelengthDataBlock>");
        puts("\t</WavelengthData>");
        return 1;
}

/* Write out XML, interpolating BSDF data block(s) */
static int
writeBSDF(const char *caller, ezxml_t fl)
{
        char    *xml = ezxml_toxml(fl);         /* store XML in string */
        int     ei, i;
                                                /* locate trailer */
        for (ei = strlen(xml)-strlen("</Layer></Optical></WindowElement>");
                        ei >= 0; ei--)
                if (!strncmp(xml+ei, "</Layer>", 8))
                        break;
        if (ei < 0) {
                fprintf(stderr, "%s: internal - cannot find trailer\n",
                                caller);
                free(xml);
                return 0;
        }
        fflush(stdout);                         /* write previous XML info. */
        if (write(fileno(stdout), xml, ei) != ei) {
                free(xml);
                return 0;
        }
        for (i = 0; i < ndataf; i++)            /* interpolate new data */
                if (!writeBSDFblock(caller, &data_file[i])) {
                        free(xml);
                        return 0;
                }
        fputs(xml+ei, stdout);                  /* write trailer */
        free(xml);                              /* free string */
        fputc('\n', stdout);
        return (fflush(stdout) == 0);
}

/* Insert BSDF data into XML wrapper */
static int
wrapBSDF(const char *caller)
{
        const char      *xml_path = xml_input;
        ezxml_t         fl, wtl;
                                        /* load previous XML/template */
        if (xml_input == stdin_name) {
                fl = ezxml_parse_fp(stdin);
        } else if (xml_input[0] == '!') {
                FILE    *pfp = popen(xml_input+1, "r");
                if (pfp == NULL) {
                        fprintf(stderr, "%s: cannot start process '%s'\n",
                                        caller, xml_input);
                        return 0;
                }
                fl = ezxml_parse_fp(pfp);
                if (pclose(pfp)) {
                        fprintf(stderr, "%s: error running '%s'\n",
                                        caller, xml_input);
                        return 0;
                }
        } else {
                xml_path = getpath((char *)xml_input, getrlibpath(), R_OK);
                if (xml_path == NULL) {
                        fprintf(stderr, "%s: cannot find XML file named '%s'\n",
                                        caller, xml_input==NULL ? "NULL" : xml_input);
                        return 0;
                }
                fl = ezxml_parse_file(xml_path);
        }
        if (fl == NULL) {
                fprintf(stderr, "%s: cannot load XML '%s'\n", caller, xml_path);
                return 0;
        }
        if (ezxml_error(fl)[0]) {
                fprintf(stderr, "%s: error in XML '%s': %s\n", caller, xml_path,
                                ezxml_error(fl));
                goto failure;
        }
        if (strcmp(ezxml_name(fl), top_level_name)) {
                fprintf(stderr, "%s: top level in XML '%s' not '%s'\n",
                                caller, xml_path, top_level_name);
                goto failure;
        }
        wtl = ezxml_child(fl, "FileType");
        if (wtl != NULL && strcmp(ezxml_txt(wtl), "BSDF")) {
                fprintf(stderr, "%s: wrong FileType in XML '%s' (must be 'BSDF')",
                                caller, xml_path);
                goto failure;
        }
        wtl = ezxml_child(ezxml_child(fl, "Optical"), "Layer");
        if (wtl == NULL) {
                fprintf(stderr, "%s: no optical layers in XML '%s'",
                                caller, xml_path);
                goto failure;
        }
                                        /* make material assignments */
        if (!mat_assignments(caller, xml_path, wtl))
                goto failure;
        if (mgf_geometry != NULL) {     /* add geometry if specified */
                ezxml_t geom = ezxml_child(wtl, "Geometry");
                if (geom == NULL)
                        geom = ezxml_add_child(wtl, "Geometry", strlen(wtl->txt));
                ezxml_set_attr(geom, "format", "MGF");
                geom = ezxml_child(geom, "MGFblock");
                if (geom == NULL) {
                        geom = ezxml_child(wtl, "Geometry");
                        geom = ezxml_add_child(geom, "MGFblock", 0);
                }
                ezxml_set_attr(geom, "unit", attr_unit);
                ezxml_set_txt(geom, input2str(mgf_geometry));
                if (geom->txt[0])
                        ezxml_set_flag(geom, EZXML_TXTM);
        }
                                        /* check basis */
        if (angle_basis != ABdefault) {
                size_t  offset = 0;
                ezxml_t ab, dd = ezxml_child(wtl, "DataDefinition");
                if (dd != NULL) {
                        offset = dd->off;
                        if (dd->child != NULL)
                                fprintf(stderr,
                "%s: warning - replacing existing <DataDefinition> in '%s'\n",
                                                caller, xml_path);
                        ezxml_remove(dd);
                } else
                        offset = strlen(wtl->txt);
                dd = ezxml_insert(ezxml_parse_str(basis_definition[angle_basis],
                                        strlen(basis_definition[angle_basis])),
                                wtl, offset);
                if ((ab = ezxml_child(dd, "AngleBasis")) != NULL &&
                                !finish_angle_basis(ab))
                        goto failure;
        } else if ((angle_basis = determine_angle_basis(xml_path, wtl)) < 0) {
                fprintf(stderr, "%s: need -a option to set angle basis\n",
                                caller);
                goto failure;
        }
                                        /* write & add BSDF data blocks */
        if (!writeBSDF(caller, fl))
                goto failure;
        ezxml_free(fl);                 /* all done */
        return 1;
failure:
        ezxml_free(fl);
        return 0;
}

/* Report usage and exit */
static void
UsageExit(const char *pname)
{
        fputs("Usage: ", stderr);
        fputs(pname, stderr);
        fputs(" [-W][-c][-a {kf|kh|kq|t3|t4}][-u unit][-g geom][-f 'x=string;y=string']", stderr);
        fputs(" [-s spectr][-tb inp][-tf inp][-rb inp][-rf inp]", stderr);
        fputs(" [input.xml]\n", stderr);
        exit(1);
}

/* Load XML file and use to wrap BSDF data (or modify fields) */
int
main(int argc, char *argv[])
{
        int     cur_spectrum = DSvisible;
        int     ncust_spec = 0;
        int     used_stdin = 0;
        int     units_set = 0;
        int     i;
                                        /* get/check arguments */
        for (i = 1; i < argc && argv[i][0] == '-'; i++) {
                switch (argv[i][1]) {
                case 'W':               /* customize for WINDOW 6 output */
                        xml_input = win6_template;
                        continue;
                case 'f':               /* field assignment(s) */
                        if (++i >= argc)
                                UsageExit(argv[0]);
                        if (nfield_assign >= MAXASSIGN) {
                                fprintf(stderr, "%s: too many -f options",
                                                argv[0]);
                                return 1;
                        }
                        field_assignment[nfield_assign++] = argv[i];
                        continue;
                case 'u':               /* unit */
                        if (++i >= argc)
                                UsageExit(argv[0]);
                        if (units_set++) {
                                fprintf(stderr, "%s: only one -u option allowed\n",
                                                argv[0]);
                                return 1;
                        }
                        if (strstr(legal_units, argv[i]) == NULL) {
                                fprintf(stderr, "%s: -u unit must be one of (%s)\n",
                                                argv[0], legal_units);
                                return 1;
                        }
                        attr_unit = argv[i];
                        continue;
                case 'a':               /* angle basis */
                        if (++i >= argc)
                                UsageExit(argv[0]);
                        if (angle_basis != ABdefault) {
                                fprintf(stderr, "%s: only one -a option allowed\n",
                                                argv[0]);
                                return 1;
                        }
                        if (!strcasecmp(argv[i], "kf"))
                                angle_basis = ABklemsFull;
                        else if (!strcasecmp(argv[i], "kh"))
                                angle_basis = ABklemsHalf;
                        else if (!strcasecmp(argv[i], "kq"))
                                angle_basis = ABklemsQuarter;
                        else if (!strcasecmp(argv[i], "t3"))
                                angle_basis = ABtensorTree3;
                        else if (!strcasecmp(argv[i], "t4"))
                                angle_basis = ABtensorTree4;
                        else
                                UsageExit(argv[0]);
                        continue;
                case 'c':               /* correct solid angle */
                        correct_solid_angle = 1;
                        continue;
                case 't':               /* transmission */
                        if (i >= argc-1)
                                UsageExit(argv[0]);
                        if (ndataf >= MAXFILES) {
                                fprintf(stderr, "%s: too many data files\n",
                                                argv[0]);
                                return 1;
                        }
                        if (!strcmp(argv[i], "-tf"))
                                data_file[ndataf].type = DTtransForward;
                        else if (!strcmp(argv[i], "-tb"))
                                data_file[ndataf].type = DTtransBackward;
                        else
                                UsageExit(argv[0]);
                        if (!strcmp(argv[++i], "-")) {
                                if (used_stdin++) UsageExit(argv[i]);
                                argv[i] = (char *)stdin_name;
                        }
                        data_file[ndataf].fname = argv[i];
                        data_file[ndataf].spectrum = cur_spectrum;
                        ndataf++;
                        continue;
                case 'r':               /* reflection */
                        if (i >= argc-1)
                                UsageExit(argv[0]);
                        if (ndataf >= MAXFILES) {
                                fprintf(stderr, "%s: too many data files\n",
                                                argv[0]);
                                return 1;
                        }
                        if (!strcmp(argv[i], "-rf"))
                                data_file[ndataf].type = DTreflForward;
                        else if (!strcmp(argv[i], "-rb"))
                                data_file[ndataf].type = DTreflBackward;
                        else
                                UsageExit(argv[0]);
                        if (!strcmp(argv[++i], "-")) {
                                if (used_stdin++) UsageExit(argv[i]);
                                argv[i] = (char *)stdin_name;
                        }
                        data_file[ndataf].fname = argv[i];
                        data_file[ndataf].spectrum = cur_spectrum;
                        ndataf++;
                        continue;
                case 's':               /* spectrum name or input file */
                        if (++i >= argc)
                                UsageExit(argv[0]);
                        if (!strcasecmp(argv[i], "Solar"))
                                cur_spectrum = DSsolar;
                        else if (!strcasecmp(argv[i], "Visible") ||
                                        !strcasecmp(argv[i], "CIE-Y"))
                                cur_spectrum = DSvisible;
                        else if (!strcasecmp(argv[i], "CIE-X"))
                                cur_spectrum = DSxbar31;
                        else if (!strcasecmp(argv[i], "CIE-Z"))
                                cur_spectrum = DSzbar31;
                        else if (!strcasecmp(argv[i], "CIE-u"))
                                cur_spectrum = DSuprime;
                        else if (!strcasecmp(argv[i], "CIE-v"))
                                cur_spectrum = DSvprime;
                        else if (!strcasecmp(argv[i], "NIR"))
                                cur_spectrum = DSnir;
                        else {
                                if (!strcmp(argv[i], "-")) {
                                        fprintf(stderr,
                                          "%s: cannot read spectra from stdin",
                                                        argv[0]);
                                        return 1;
                                }
                                cur_spectrum = ncust_spec;
                                spectr_file[ncust_spec++] = argv[i];
                        }
                        continue;
                case 'g':               /* MGF geometry file */
                        if (i >= argc-1)
                                UsageExit(argv[0]);
                        if (mgf_geometry != NULL) {
                                fprintf(stderr, "%s: only one -g option allowed\n",
                                                argv[0]);
                                return 1;
                        }
                        if (!strcmp(argv[++i], "-")) {
                                if (used_stdin++) UsageExit(argv[i]);
                                argv[i] = (char *)stdin_name;
                        }
                        mgf_geometry = argv[i];
                        continue;
                case '\0':              /* input XML from stdin */
                        break;
                default:
                        UsageExit(argv[0]);
                        break;
                }
                break;
        }
doneOptions:                                    /* get XML input */
        if (i >= argc) {
                if (xml_input == NULL)
                        xml_input = def_template;
        } else if ((i < argc-1) | (xml_input != NULL)) {
                fprintf(stderr, "%s: only one XML input allowed\n", argv[0]);
                UsageExit(argv[0]);
        } else if (!strcmp(argv[i], "-")) {
                if (used_stdin++) UsageExit(argv[0]);
                xml_input = stdin_name;
        } else {
                xml_input = argv[i];
        }
                                                /* wrap it! */
        return !wrapBSDF(argv[0]);
}
Revision:	2.14
Committed:	Thu Apr 2 16:40:32 2015 UTC (9 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.13:	+8 -10 lines
Log Message:	Support for color BSDF rendering using Klems representation