const TIFFField*
TIFFFieldWithTag(TIFF* tif, uint32 tag)
{
const TIFFField* fip = TIFFFindField(tif, tag, TIFF_ANY);
if (!fip) {
TIFFErrorExt(tif->tif_clientdata, "TIFFFieldWithTag",
"Internal error, unknown tag 0x%x",
(unsigned int) tag);
}
return (fip);
}
const TIFFField*
_TIFFFindOrRegisterField(TIFF *tif, uint32 tag, TIFFDataType dt)
{
const TIFFField *fld;
fld = TIFFFindField(tif, tag, dt);
if (fld == NULL) {
fld = _TIFFCreateAnonField(tif, tag, dt);
if (!_TIFFMergeFields(tif, fld, 1))
return NULL;
}
return fld;
}
int
_TIFFMergeFields(TIFF* tif, const TIFFField info[], uint32 n)
{
static const char module[] = "_TIFFMergeFields";
static const char reason[] = "for fields array";
/* TIFFField** tp; */
uint32 i;
tif->tif_foundfield = NULL;
if (tif->tif_fields && tif->tif_nfields > 0) {
tif->tif_fields = (TIFFField**)
_TIFFCheckRealloc(tif, tif->tif_fields,
(tif->tif_nfields + n),
sizeof(TIFFField *), reason);
} else {
tif->tif_fields = (TIFFField **)
_TIFFCheckMalloc(tif, n, sizeof(TIFFField *),
reason);
}
if (!tif->tif_fields) {
TIFFErrorExt(tif->tif_clientdata, module,
"Failed to allocate fields array");
return 0;
}
/* tp = tif->tif_fields + tif->tif_nfields; */
for (i = 0; i < n; i++) {
const TIFFField *fip =
TIFFFindField(tif, info[i].field_tag, TIFF_ANY);
/* only add definitions that aren't already present */
if (!fip) {
tif->tif_fields[tif->tif_nfields] = (TIFFField *) (info+i);
tif->tif_nfields++;
}
}
/* Sort the field info by tag number */
qsort(tif->tif_fields, tif->tif_nfields,
sizeof(TIFFField *), tagCompare);
return n;
}
// Search for TIFF tag 'tagid' having type 'tifftype', and if found,
// add it in the obvious way to m_spec under the name 'oiioname'.
void find_tag (int tifftag, TIFFDataType tifftype, const char *oiioname) {
#ifdef TIFF_VERSION_BIG
const TIFFField *info = TIFFFindField (m_tif, tifftag, tifftype);
#else
const TIFFFieldInfo *info = TIFFFindFieldInfo (m_tif, tifftag, tifftype);
#endif
if (! info) {
// Something has gone wrong, libtiff doesn't think the field type
// is the same as we do.
return;
}
if (tifftype == TIFF_ASCII)
get_string_attribute (oiioname, tifftag);
else if (tifftype == TIFF_SHORT)
get_short_attribute (oiioname, tifftag);
else if (tifftype == TIFF_LONG)
get_int_attribute (oiioname, tifftag);
else if (tifftype == TIFF_RATIONAL || tifftype == TIFF_SRATIONAL ||
tifftype == TIFF_FLOAT || tifftype == TIFF_DOUBLE)
get_float_attribute (oiioname, tifftag);
}