bool KExiv2::Private::saveOperations(const QFileInfo& finfo, Exiv2::Image::AutoPtr image) const
{
try
{
Exiv2::AccessMode mode;
bool wroteComment = false, wroteEXIF = false, wroteIPTC = false, wroteXMP = false;
// We need to load target file metadata to merge with new one. It's mandatory with TIFF format:
// like all tiff file structure is based on Exif.
image->readMetadata();
// Image Comments ---------------------------------
mode = image->checkMode(Exiv2::mdComment);
if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
{
image->setComment(imageComments());
wroteComment = true;
}
// Exif metadata ----------------------------------
mode = image->checkMode(Exiv2::mdExif);
if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
{
if (image->mimeType() == "image/tiff")
{
Exiv2::ExifData orgExif = image->exifData();
Exiv2::ExifData newExif;
QStringList untouchedTags;
// With tiff image we cannot overwrite whole Exif data as well, because
// image data are stored in Exif container. We need to take a care about
// to not lost image data.
untouchedTags << "Exif.Image.ImageWidth";
untouchedTags << "Exif.Image.ImageLength";
untouchedTags << "Exif.Image.BitsPerSample";
untouchedTags << "Exif.Image.Compression";
untouchedTags << "Exif.Image.PhotometricInterpretation";
untouchedTags << "Exif.Image.FillOrder";
untouchedTags << "Exif.Image.SamplesPerPixel";
untouchedTags << "Exif.Image.StripOffsets";
untouchedTags << "Exif.Image.RowsPerStrip";
untouchedTags << "Exif.Image.StripByteCounts";
untouchedTags << "Exif.Image.XResolution";
untouchedTags << "Exif.Image.YResolution";
untouchedTags << "Exif.Image.PlanarConfiguration";
untouchedTags << "Exif.Image.ResolutionUnit";
for (Exiv2::ExifData::iterator it = orgExif.begin(); it != orgExif.end(); ++it)
{
if (untouchedTags.contains(it->key().c_str()))
{
newExif[it->key().c_str()] = orgExif[it->key().c_str()];
}
}
Exiv2::ExifData readedExif = exifMetadata();
for (Exiv2::ExifData::iterator it = readedExif.begin(); it != readedExif.end(); ++it)
{
if (!untouchedTags.contains(it->key().c_str()))
{
newExif[it->key().c_str()] = readedExif[it->key().c_str()];
}
}
image->setExifData(newExif);
}
else
{
image->setExifData(exifMetadata());
}
wroteEXIF = true;
}
// Iptc metadata ----------------------------------
mode = image->checkMode(Exiv2::mdIptc);
if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
{
image->setIptcData(iptcMetadata());
wroteIPTC = true;
}
// Xmp metadata -----------------------------------
mode = image->checkMode(Exiv2::mdXmp);
if ((mode == Exiv2::amWrite) || (mode == Exiv2::amReadWrite))
{
#ifdef _XMP_SUPPORT_
image->setXmpData(xmpMetadata());
wroteXMP = true;
#endif
}
if (!wroteComment && !wroteEXIF && !wroteIPTC && !wroteXMP)
{
kDebug() << "Writing metadata is not supported for file" << finfo.fileName();
return false;
}
else if (!wroteEXIF || !wroteIPTC || !wroteXMP)
{
kDebug() << "Support for writing metadata is limited for file" << finfo.fileName()
<< "EXIF" << wroteEXIF << "IPTC" << wroteIPTC << "XMP" << wroteXMP;
}
if (!updateFileTimeStamp)
{
// Don't touch access and modification timestamp of file.
struct stat st;
::stat(QFile::encodeName(filePath), &st);
struct utimbuf ut;
ut.modtime = st.st_mtime;
ut.actime = st.st_atime;
image->writeMetadata();
::utime(QFile::encodeName(filePath), &ut);
}
else
{
image->writeMetadata();
}
return true;
}
catch( Exiv2::Error& e )
{
printExiv2ExceptionError("Cannot save metadata using Exiv2 ", e);
}
return false;
}
void MetaEngine::Private::loadSidecarData(Exiv2::Image::AutoPtr xmpsidecar)
{
// Having a sidecar is a special situation.
// The sidecar data often "dominates", see in particular bug 309058 for important aspects:
// If a field is removed from the sidecar, we must ignore (older) data for this field in the file.
// First: Ignore file XMP, only use sidecar XMP
xmpMetadata() = xmpsidecar->xmpData();
loadedFromSidecar = true;
// EXIF
// Four groups of properties are mapped between EXIF and XMP:
// Date/Time, Description, Copyright, Creator
// A few more tags are defined "writeback" tags in the XMP specification, the sidecar value therefore overrides the Exif value.
// The rest is kept side-by-side.
// (to understand, remember that the xmpsidecar's Exif data is actually XMP data mapped back to Exif)
// Description, Copyright and Creator is dominated by the sidecar: Remove file Exif fields, if field not in XMP.
ExifMergeHelper exifDominatedHelper;
exifDominatedHelper << QLatin1String("Exif.Image.ImageDescription")
<< QLatin1String("Exif.Photo.UserComment")
<< QLatin1String("Exif.Image.Copyright")
<< QLatin1String("Exif.Image.Artist");
exifDominatedHelper.exclusiveMerge(xmpsidecar->exifData(), exifMetadata());
// Date/Time and "the few more" from the XMP spec are handled as writeback
// Note that Date/Time mapping is slightly contradictory in latest specs.
ExifMergeHelper exifWritebackHelper;
exifWritebackHelper << QLatin1String("Exif.Image.DateTime")
<< QLatin1String("Exif.Image.DateTime")
<< QLatin1String("Exif.Photo.DateTimeOriginal")
<< QLatin1String("Exif.Photo.DateTimeDigitized")
<< QLatin1String("Exif.Image.Orientation")
<< QLatin1String("Exif.Image.XResolution")
<< QLatin1String("Exif.Image.YResolution")
<< QLatin1String("Exif.Image.ResolutionUnit")
<< QLatin1String("Exif.Image.Software")
<< QLatin1String("Exif.Photo.RelatedSoundFile");
exifWritebackHelper.mergeFields(xmpsidecar->exifData(), exifMetadata());
// IPTC
// These fields cover almost all relevant IPTC data and are defined in the XMP specification for reconciliation.
IptcMergeHelper iptcDominatedHelper;
iptcDominatedHelper << QLatin1String("Iptc.Application2.ObjectName")
<< QLatin1String("Iptc.Application2.Urgency")
<< QLatin1String("Iptc.Application2.Category")
<< QLatin1String("Iptc.Application2.SuppCategory")
<< QLatin1String("Iptc.Application2.Keywords")
<< QLatin1String("Iptc.Application2.SubLocation")
<< QLatin1String("Iptc.Application2.SpecialInstructions")
<< QLatin1String("Iptc.Application2.Byline")
<< QLatin1String("Iptc.Application2.BylineTitle")
<< QLatin1String("Iptc.Application2.City")
<< QLatin1String("Iptc.Application2.ProvinceState")
<< QLatin1String("Iptc.Application2.CountryCode")
<< QLatin1String("Iptc.Application2.CountryName")
<< QLatin1String("Iptc.Application2.TransmissionReference")
<< QLatin1String("Iptc.Application2.Headline")
<< QLatin1String("Iptc.Application2.Credit")
<< QLatin1String("Iptc.Application2.Source")
<< QLatin1String("Iptc.Application2.Copyright")
<< QLatin1String("Iptc.Application2.Caption")
<< QLatin1String("Iptc.Application2.Writer");
iptcDominatedHelper.exclusiveMerge(xmpsidecar->iptcData(), iptcMetadata());
IptcMergeHelper iptcWritebackHelper;
iptcWritebackHelper << QLatin1String("Iptc.Application2.DateCreated")
<< QLatin1String("Iptc.Application2.TimeCreated")
<< QLatin1String("Iptc.Application2.DigitizationDate")
<< QLatin1String("Iptc.Application2.DigitizationTime");
iptcWritebackHelper.mergeFields(xmpsidecar->iptcData(), iptcMetadata());
/*
* TODO: Exiv2 (referring to 0.23) does not correctly synchronize all times values as given below.
* Time values and their synchronization:
* Original Date/Time – Creation date of the intellectual content (e.g. the photograph),
rather than the creatio*n date of the content being shown
Exif DateTimeOriginal (36867, 0x9003) and SubSecTimeOriginal (37521, 0x9291)
IPTC DateCreated (IIM 2:55, 0x0237) and TimeCreated (IIM 2:60, 0x023C)
XMP (photoshop:DateCreated)
* Digitized Date/Time – Creation date of the digital representation
Exif DateTimeDigitized (36868, 0x9004) and SubSecTimeDigitized (37522, 0x9292)
IPTC DigitalCreationDate (IIM 2:62, 0x023E) and DigitalCreationTime (IIM 2:63, 0x023F)
XMP (xmp:CreateDate)
* Modification Date/Time – Modification date of the digital image file
Exif DateTime (306, 0x132) and SubSecTime (37520, 0x9290)
XMP (xmp:ModifyDate)
*/
}
