void
RawInput::read_tiff_metadata (const std::string &filename)
{
// Many of these raw formats look just like TIFF files, and we can use
// that to extract a bunch of extra Exif metadata and thumbnail.
ImageInput *in = ImageInput::create ("tiff");
if (! in) {
(void) OIIO::geterror(); // eat the error
return;
}
ImageSpec newspec;
bool ok = in->open (filename, newspec);
if (ok) {
// Transfer "Exif:" metadata to the raw spec.
for (ParamValueList::const_iterator p = newspec.extra_attribs.begin();
p != newspec.extra_attribs.end(); ++p) {
if (Strutil::istarts_with (p->name().c_str(), "Exif:")) {
m_spec.attribute (p->name().c_str(), p->type(), p->data());
}
}
}
in->close ();
delete in;
}
// Turn one ParamValue (whose xmp info we know) into a properly
// serialized xmp string.
static std::string
stringize(const ParamValueList::const_iterator& p, const XMPtag& xmptag)
{
if (p->type() == TypeDesc::STRING) {
if (xmptag.special & DateConversion) {
// FIXME -- convert to yyyy-mm-ddThh:mm:ss.sTZD
// return std::string();
}
return std::string(*(const char**)p->data());
} else if (p->type() == TypeDesc::INT) {
if (xmptag.special & IsBool)
return *(const int*)p->data() ? "True" : "False";
else // ordinary int
return Strutil::sprintf("%d", *(const int*)p->data());
} else if (p->type() == TypeDesc::FLOAT) {
if (xmptag.special & Rational) {
unsigned int num, den;
float_to_rational(*(const float*)p->data(), num, den);
return Strutil::sprintf("%d/%d", num, den);
} else {
return Strutil::sprintf("%g", *(const float*)p->data());
}
}
return std::string();
}
static void
gather_xmp_attribs(const ImageSpec& spec,
std::vector<std::pair<const XMPtag*, std::string>>& list)
{
// Loop over all params...
for (ParamValueList::const_iterator p = spec.extra_attribs.begin();
p != spec.extra_attribs.end(); ++p) {
// For this param, see if there's a table entry with a matching
// name, where the xmp name is in the right category.
const XMPtag* tag = xmp_tagmap_ref().find(p->name());
if (tag) {
if (!Strutil::iequals(p->name(), tag->oiioname))
continue; // Name doesn't match
if (tag->special & Suppress) {
break; // Purposely suppressing
}
std::string s = stringize(p, *tag);
if (s.size()) {
list.emplace_back(tag, s);
//std::cerr << " " << tag->xmpname << " = " << s << "\n";
}
}
}
}