public void TestXResolutionDescription()
{
var directory = new ExifIfd0Directory();
directory.Set(ExifDirectoryBase.TagXResolution, new Rational(72, 1));
// 2 is for 'Inch'
directory.Set(ExifDirectoryBase.TagResolutionUnit, 2);
var descriptor = new ExifIfd0Descriptor(directory);
Assert.Equal("72 dots per inch", descriptor.GetDescription(ExifDirectoryBase.TagXResolution));
}
public void TestYResolutionDescription()
{
var directory = new ExifIfd0Directory();
directory.Set(ExifDirectoryBase.TagYResolution, new Rational(50, 1));
// 3 is for 'cm'
directory.Set(ExifDirectoryBase.TagResolutionUnit, 3);
var descriptor = new ExifIfd0Descriptor(directory);
Assert.Equal("50 dots per cm", descriptor.GetDescription(ExifDirectoryBase.TagYResolution));
}
public void TestYResolutionDescription()
{
var directory = new ExifIfd0Directory();
directory.Set(ExifDirectoryBase.TagYResolution, new Rational(50, 1));
// 3 is for 'cm'
directory.Set(ExifDirectoryBase.TagResolutionUnit, 3);
var descriptor = new ExifIfd0Descriptor(directory);
Assert.Equal("50 dots per cm", descriptor.GetDescription(ExifDirectoryBase.TagYResolution));
}
public void TestXResolutionDescription()
{
var directory = new ExifIfd0Directory();
directory.Set(ExifDirectoryBase.TagXResolution, new Rational(72, 1));
// 2 is for 'Inch'
directory.Set(ExifDirectoryBase.TagResolutionUnit, 2);
var descriptor = new ExifIfd0Descriptor(directory);
Assert.Equal("72 dots per inch", descriptor.GetDescription(ExifDirectoryBase.TagXResolution));
}
public void TestWindowsXpFields()
{
var directory = ExifReaderTest.ProcessSegmentBytes<ExifIfd0Directory>("Tests/Data/windowsXpFields.jpg.app1");
Assert.Equal("Testing artist\x0", directory.GetString(ExifDirectoryBase.TagWinAuthor, Encoding.Unicode));
Assert.Equal("Testing comments\x0", directory.GetString(ExifDirectoryBase.TagWinComment, Encoding.Unicode));
Assert.Equal("Testing keywords\x0", directory.GetString(ExifDirectoryBase.TagWinKeywords, Encoding.Unicode));
Assert.Equal("Testing subject\x0", directory.GetString(ExifDirectoryBase.TagWinSubject, Encoding.Unicode));
Assert.Equal("Testing title\x0", directory.GetString(ExifDirectoryBase.TagWinTitle, Encoding.Unicode));
var descriptor = new ExifIfd0Descriptor(directory);
Assert.Equal("Testing artist", descriptor.GetDescription(ExifDirectoryBase.TagWinAuthor));
Assert.Equal("Testing comments", descriptor.GetDescription(ExifDirectoryBase.TagWinComment));
Assert.Equal("Testing keywords", descriptor.GetDescription(ExifDirectoryBase.TagWinKeywords));
Assert.Equal("Testing subject", descriptor.GetDescription(ExifDirectoryBase.TagWinSubject));
Assert.Equal("Testing title", descriptor.GetDescription(ExifDirectoryBase.TagWinTitle));
}
public void TestWindowsXpFields()
{
var directory = ExifReaderTest.ProcessSegmentBytes <ExifIfd0Directory>("Tests/Data/windowsXpFields.jpg.app1");
Assert.Equal("Testing artist\x0", directory.GetString(ExifDirectoryBase.TagWinAuthor, Encoding.Unicode));
Assert.Equal("Testing comments\x0", directory.GetString(ExifDirectoryBase.TagWinComment, Encoding.Unicode));
Assert.Equal("Testing keywords\x0", directory.GetString(ExifDirectoryBase.TagWinKeywords, Encoding.Unicode));
Assert.Equal("Testing subject\x0", directory.GetString(ExifDirectoryBase.TagWinSubject, Encoding.Unicode));
Assert.Equal("Testing title\x0", directory.GetString(ExifDirectoryBase.TagWinTitle, Encoding.Unicode));
var descriptor = new ExifIfd0Descriptor(directory);
Assert.Equal("Testing artist", descriptor.GetDescription(ExifDirectoryBase.TagWinAuthor));
Assert.Equal("Testing comments", descriptor.GetDescription(ExifDirectoryBase.TagWinComment));
Assert.Equal("Testing keywords", descriptor.GetDescription(ExifDirectoryBase.TagWinKeywords));
Assert.Equal("Testing subject", descriptor.GetDescription(ExifDirectoryBase.TagWinSubject));
Assert.Equal("Testing title", descriptor.GetDescription(ExifDirectoryBase.TagWinTitle));
}
private static Tuple <string, string, string[]> AlternativeReadingMetadataMethod(IFileSystem fileSystem, string filePath)
{
using var fs = fileSystem.File.OpenRead(filePath);
var metadata = (JpegMetadataReader.ReadMetadata(fs));
var iFD0Directory = metadata.OfType <ExifIfd0Directory>().FirstOrDefault();
var exifIfd0Descriptor = new ExifIfd0Descriptor(iFD0Directory);
var Ifd0Description = exifIfd0Descriptor.GetDescription(ExifIfd0Directory.TagImageDescription);
var Ifd0Keywords = exifIfd0Descriptor.GetDescription(ExifIfd0Directory.TagWinKeywords);
var Ifd0Title = exifIfd0Descriptor.GetDescription(ExifIfd0Directory.TagWinTitle);
//var subIfdDirectory = metadata.OfType<ExifSubIfdDirectory>().FirstOrDefault();
//var subIfdDescriptor = new ExifSubIfdDescriptor(subIfdDirectory);
// returns something like 4261 pixels
//var dagExifImageWidth = subIfdDescriptor.GetDescription(ExifDirectoryBase.TagExifImageWidth);
//var dagExifImageHeight = subIfdDescriptor.GetDescription(ExifDirectoryBase.TagExifImageHeight);
var thumbnailDirectory = metadata.OfType <ExifThumbnailDirectory>().FirstOrDefault();
var thumbnailDescriptor = new ExifThumbnailDescriptor(thumbnailDirectory);
var thumbnailOffset = thumbnailDescriptor.GetDescription(ExifThumbnailDirectory.TagThumbnailOffset);
var thumbnailYResolution = thumbnailDescriptor.GetDescription(ExifThumbnailDirectory.TagYResolution);
var thumbnailXResolution = thumbnailDescriptor.GetDescription(ExifThumbnailDirectory.TagXResolution);
var thumbnailLength = thumbnailDescriptor.GetDescription(ExifThumbnailDirectory.TagThumbnailLength);
var thumbnailCompression = thumbnailDescriptor.GetDescription(ExifThumbnailDirectory.TagCompression);
var IPTCDirectory = metadata.OfType <IptcDirectory>().FirstOrDefault();
var iptcDescriptor = new IptcDescriptor(IPTCDirectory);
var IPTCDescription = iptcDescriptor.GetDescription(IptcDirectory.TagCaption);
var IPTCKeywords = iptcDescriptor.GetDescription(IptcDirectory.TagKeywords); // like "TestFile1Kw1;TestFile1Kw2;TestFile1Kw3;TestFile1Kw4"
var IPTCTitle = iptcDescriptor.GetDescription(IptcDirectory.TagObjectName);
var keywordsAsString = string.IsNullOrWhiteSpace(Ifd0Keywords) ? IPTCKeywords : Ifd0Keywords;
var arrayOrKeywords = keywordsAsString?.Split(';');
var title = string.IsNullOrWhiteSpace(Ifd0Title) ? IPTCTitle : Ifd0Title;
var description = string.IsNullOrWhiteSpace(Ifd0Description) ? IPTCDescription : Ifd0Description;
return(new Tuple <string, string, string[]>(title, description, arrayOrKeywords));
}
