int JpegContent::dotsPerMeter(const QString& keyName) const
{
Exiv2::ExifKey keyResUnit("Exif.Image.ResolutionUnit");
Exiv2::ExifData::iterator it = d->mExifData.findKey(keyResUnit);
if (it == d->mExifData.end()) {
return 0;
}
int res = it->toLong();
QString keyVal = "Exif.Image." + keyName;
Exiv2::ExifKey keyResolution(keyVal.toAscii().data());
it = d->mExifData.findKey(keyResolution);
if (it == d->mExifData.end()) {
return 0;
}
// The unit for measuring XResolution and YResolution. The same unit is used for both XResolution and YResolution.
// If the image resolution in unknown, 2 (inches) is designated.
// Default = 2
// 2 = inches
// 3 = centimeters
// Other = reserved
const float INCHESPERMETER = (100. / 2.54);
switch (res) {
case 3: // dots per cm
return int(it->toLong() * 100);
default: // dots per inch
return int(it->toLong() * INCHESPERMETER);
}
return 0;
}
Orientation JpegContent::orientation() const
{
Exiv2::ExifKey key("Exif.Image.Orientation");
Exiv2::ExifData::iterator it = d->mExifData.findKey(key);
// We do the same checks as in libexiv2's src/crwimage.cpp:
// http://dev.exiv2.org/projects/exiv2/repository/entry/trunk/src/crwimage.cpp?rev=2681#L1336
if (it == d->mExifData.end() || it->count() == 0 || it->typeId() != Exiv2::unsignedShort) {
return NOT_AVAILABLE;
}
return Orientation(it->toLong());
}
bool _getExiv2Value(Exiv2::ExifData& exifData, std::string keyName, long & value)
{
Exiv2::ExifData::iterator itr = exifData.findKey(Exiv2::ExifKey(keyName));
if (itr != exifData.end() && itr->count())
{
value = itr->toLong();
return true;
}
else
{
return false;
};
};
QSize KExiv2::getImageDimensions() const
{
try
{
long width=-1, height=-1;
// Try to get Exif.Photo tags
Exiv2::ExifData exifData(d->exifMetadata());
Exiv2::ExifKey key("Exif.Photo.PixelXDimension");
Exiv2::ExifData::iterator it = exifData.findKey(key);
if (it != exifData.end() && it->count())
width = it->toLong();
Exiv2::ExifKey key2("Exif.Photo.PixelYDimension");
Exiv2::ExifData::iterator it2 = exifData.findKey(key2);
if (it2 != exifData.end() && it2->count())
height = it2->toLong();
if (width != -1 && height != -1)
return QSize(width, height);
// Try to get Exif.Image tags
width = -1;
height = -1;
Exiv2::ExifKey key3("Exif.Image.ImageWidth");
Exiv2::ExifData::iterator it3 = exifData.findKey(key3);
if (it3 != exifData.end() && it3->count())
width = it3->toLong();
Exiv2::ExifKey key4("Exif.Image.ImageLength");
Exiv2::ExifData::iterator it4 = exifData.findKey(key4);
if (it4 != exifData.end() && it4->count())
height = it4->toLong();
if (width != -1 && height != -1)
return QSize(width, height);
#ifdef _XMP_SUPPORT_
// Try to get Xmp.tiff tags
width = -1;
height = -1;
bool wOk = false;
bool hOk = false;
QString str = getXmpTagString("Xmp.tiff.ImageWidth");
if (!str.isEmpty())
width = str.toInt(&wOk);
str = getXmpTagString("Xmp.tiff.ImageLength");
if (!str.isEmpty())
height = str.toInt(&hOk);
if (wOk && hOk)
return QSize(width, height);
// Try to get Xmp.exif tags
width = -1;
height = -1;
wOk = false;
hOk = false;
str = getXmpTagString("Xmp.exif.PixelXDimension");
if (!str.isEmpty())
width = str.toInt(&wOk);
str = getXmpTagString("Xmp.exif.PixelYDimension");
if (!str.isEmpty())
height = str.toInt(&hOk);
if (wOk && hOk)
return QSize(width, height);
#endif // _XMP_SUPPORT_
}
catch( Exiv2::Error& e )
{
d->printExiv2ExceptionError("Cannot parse image dimensions tag using Exiv2 ", e);
}
catch(...)
{
kError() << "Default exception from Exiv2";
}
return QSize();
}
bool KExiv2::setImageOrientation(ImageOrientation orientation, bool setProgramName) const
{
if (!setProgramId(setProgramName))
return false;
try
{
if (orientation < ORIENTATION_UNSPECIFIED || orientation > ORIENTATION_ROT_270)
{
kDebug() << "Image orientation value is not correct!";
return false;
}
// Set Exif values.
d->exifMetadata()["Exif.Image.Orientation"] = static_cast<uint16_t>(orientation);
kDebug() << "Exif.Image.Orientation tag set to: " << (int)orientation;
// Set Xmp values.
#ifdef _XMP_SUPPORT_
setXmpTagString("Xmp.tiff.Orientation", QString::number((int)orientation), false);
#endif // _XMP_SUPPORT_
// -- Minolta/Sony Cameras ----------------------------------
// Minolta and Sony camera store image rotation in Makernote.
// We remove these information to prevent duplicate values.
Exiv2::ExifData::iterator it;
Exiv2::ExifKey minoltaKey1("Exif.MinoltaCs7D.Rotation");
it = d->exifMetadata().findKey(minoltaKey1);
if (it != d->exifMetadata().end())
{
d->exifMetadata().erase(it);
kDebug() << "Removing Exif.MinoltaCs7D.Rotation tag";
}
Exiv2::ExifKey minoltaKey2("Exif.MinoltaCs5D.Rotation");
it = d->exifMetadata().findKey(minoltaKey2);
if (it != d->exifMetadata().end())
{
d->exifMetadata().erase(it);
kDebug() << "Removing Exif.MinoltaCs5D.Rotation tag";
}
// -- Exif embedded thumbnail ----------------------------------
Exiv2::ExifKey thumbKey("Exif.Thumbnail.Orientation");
it = d->exifMetadata().findKey(thumbKey);
if (it != d->exifMetadata().end() && it->count())
{
RotationMatrix operation((KExiv2Iface::KExiv2::ImageOrientation)it->toLong());
operation *= orientation;
(*it) = static_cast<uint16_t>(operation.exifOrientation());
}
return true;
}
catch( Exiv2::Error& e )
{
d->printExiv2ExceptionError("Cannot set Exif Orientation tag using Exiv2 ", e);
}
catch(...)
{
kError() << "Default exception from Exiv2";
}
return false;
}
KExiv2::ImageOrientation KExiv2::getImageOrientation() const
{
try
{
Exiv2::ExifData exifData(d->exifMetadata());
Exiv2::ExifData::iterator it;
long orientation;
ImageOrientation imageOrient = ORIENTATION_NORMAL;
// -- Standard Xmp tag --------------------------------
#ifdef _XMP_SUPPORT_
bool ok = false;
QString str = getXmpTagString("Xmp.tiff.Orientation");
if (!str.isEmpty())
{
orientation = str.toLong(&ok);
if (ok)
{
kDebug() << "Orientation => Xmp.tiff.Orientation => " << (int)orientation;
return (ImageOrientation)orientation;
}
}
#endif // _XMP_SUPPORT_
// Because some camera set a wrong standard exif orientation tag,
// We need to check makernote tags in first!
// -- Minolta Cameras ----------------------------------
Exiv2::ExifKey minoltaKey1("Exif.MinoltaCs7D.Rotation");
it = exifData.findKey(minoltaKey1);
if (it != exifData.end() && it->count())
{
orientation = it->toLong();
kDebug() << "Orientation => Exif.MinoltaCs7D.Rotation => " << (int)orientation;
switch(orientation)
{
case 76:
imageOrient = ORIENTATION_ROT_90;
break;
case 82:
imageOrient = ORIENTATION_ROT_270;
break;
}
return imageOrient;
}
Exiv2::ExifKey minoltaKey2("Exif.MinoltaCs5D.Rotation");
it = exifData.findKey(minoltaKey2);
if (it != exifData.end() && it->count())
{
orientation = it->toLong();
kDebug() << "Orientation => Exif.MinoltaCs5D.Rotation => " << (int)orientation;
switch(orientation)
{
case 76:
imageOrient = ORIENTATION_ROT_90;
break;
case 82:
imageOrient = ORIENTATION_ROT_270;
break;
}
return imageOrient;
}
// -- Standard Exif tag --------------------------------
Exiv2::ExifKey keyStd("Exif.Image.Orientation");
it = exifData.findKey(keyStd);
if (it != exifData.end() && it->count())
{
orientation = it->toLong();
kDebug() << "Orientation => Exif.Image.Orientation => " << (int)orientation;
return (ImageOrientation)orientation;
}
}
catch( Exiv2::Error& e )
{
d->printExiv2ExceptionError("Cannot parse Exif Orientation tag using Exiv2 ", e);
}
catch(...)
{
kError() << "Default exception from Exiv2";
}
return ORIENTATION_UNSPECIFIED;
}
long GalleryUtil::GetNaturalRotation(const QString &filePathString)
{
long rotateAngle = 0;
#ifdef EXIF_SUPPORT
QByteArray filePathBA = filePathString.toLocal8Bit();
const char *filePath = filePathBA.constData();
try
{
char *exifvalue = new char[1024];
ExifData *data = exif_data_new_from_file (filePath);
if (data)
{
for (int i = 0; i < EXIF_IFD_COUNT; i++)
{
ExifEntry *entry = exif_content_get_entry (data->ifd[i],
EXIF_TAG_ORIENTATION);
ExifByteOrder byteorder = exif_data_get_byte_order (data);
if (entry)
{
ExifShort v_short = exif_get_short (entry->data, byteorder);
VERBOSE(VB_GENERAL|VB_EXTRA, QString("Exif entry=%1").arg(v_short));
/* See http://sylvana.net/jpegcrop/exif_orientation.html*/
if (v_short == 8)
{
rotateAngle = -90;
}
else if (v_short == 6)
{
rotateAngle = 90;
}
break;
}
}
exif_data_free(data);
}
else
{
VERBOSE(VB_FILE, LOC_ERR +
QString("Could not load exif data from '%1'")
.arg(filePath));
}
delete [] exifvalue;
#if 0
Exiv2::ExifData exifData;
int rc = exifData.read(filePath);
if (!rc)
{
Exiv2::ExifKey key = Exiv2::ExifKey("Exif.Image.Orientation");
Exiv2::ExifData::iterator pos = exifData.findKey(key);
if (pos != exifData.end())
{
long orientation = pos->toLong();
switch (orientation)
{
case 6:
rotateAngle = 90;
break;
case 8:
rotateAngle = -90;
break;
default:
rotateAngle = 0;
break;
}
}
}
#endif
}
catch (...)
{
VERBOSE(VB_IMPORTANT, LOC_ERR +
QString("Failed to extract EXIF headers from '%1'")
.arg(filePathString));
}
#else
// Shut the compiler up about the unused argument
(void)filePathString;
#endif // EXIF_SUPPORT
return rotateAngle;
}