public void TestSRational()
{
var defaultSRational = new TiffSRational();
Assert.Equal(0, defaultSRational.Numerator);
Assert.Equal(0, defaultSRational.Denominator);
Assert.Equal(0 / 0f, defaultSRational.ToSingle());
Assert.Equal(0 / 0d, defaultSRational.ToDouble());
var srational1 = new TiffSRational(1, -2);
Assert.Equal(1, srational1.Numerator);
Assert.Equal(-2, srational1.Denominator);
Assert.False(srational1.Equals(defaultSRational));
Assert.False(defaultSRational.Equals(srational1));
Assert.False(srational1 == defaultSRational);
Assert.False(defaultSRational == srational1);
Assert.True(srational1 != defaultSRational);
Assert.True(defaultSRational != srational1);
Assert.False(srational1.GetHashCode() == defaultSRational.GetHashCode());
Assert.Equal(-1 / 2f, srational1.ToSingle());
Assert.Equal(-1 / 2d, srational1.ToDouble());
var srational2 = new TiffSRational(1, -2);
Assert.True(srational1.Equals(srational2));
Assert.True(srational2.Equals(srational1));
Assert.True(srational1 == srational2);
Assert.True(srational2 == srational1);
Assert.False(srational1 != srational2);
Assert.False(srational2 != srational1);
Assert.True(srational1.GetHashCode() == srational2.GetHashCode());
}
/// <summary>
/// Returns the TIFF tag information.
/// </summary>
/// <param name="tagId">The tag identifier.</param>
/// <param name="tagValue">The tag value.</param>
private bool GetTiffTagInfo(out int tagId, out object tagValue)
{
tagId = 0;
tagValue = (int)0;
using (AddTiffTagForm dlg = new AddTiffTagForm())
{
if (dlg.ShowDialog() == DialogResult.OK)
{
tagId = dlg.TagId;
// get the tag data value
switch (dlg.TagDataType)
{
case TiffTagDataType.Ascii:
tagValue = dlg.StringValue;
break;
case TiffTagDataType.Short:
tagValue = (ushort)dlg.IntegerValue;
break;
case TiffTagDataType.SShort:
tagValue = (short)dlg.IntegerValue;
break;
case TiffTagDataType.Long:
tagValue = (uint)dlg.IntegerValue;
break;
case TiffTagDataType.SLong:
tagValue = (int)dlg.IntegerValue;
break;
case TiffTagDataType.Float:
tagValue = (float)dlg.DoubleValue;
break;
case TiffTagDataType.Double:
tagValue = dlg.DoubleValue;
break;
case TiffTagDataType.Rational:
// create long rational value
tagValue = new TiffRational((uint)dlg.NumeratorValue, (uint)dlg.DenominatorValue);
break;
case TiffTagDataType.SRational:
// create short long rational value
tagValue = new TiffSRational((int)dlg.NumeratorValue, (uint)dlg.DenominatorValue);
break;
}
return(true);
}
}
return(false);
}
public async Task TestSRationalCompatibility(int length, bool bigTiff)
{
TiffSRational[] refData = new TiffSRational[length];
new Random(42).NextBytes(MemoryMarshal.AsBytes(refData.AsSpan()));
using Stream stream = await GenerateTiffAsync(bigTiff, async ifd =>
{
await ifd.WriteTagAsync((TiffTag) 0x1234, TiffValueCollection.UnsafeWrap(refData));
});
await using (TiffFileReader reader = await TiffFileReader.OpenAsync(stream, leaveOpen: true))
{
TiffImageFileDirectory ifd = await reader.ReadImageFileDirectoryAsync();
TiffFieldReader fieldReader = await reader.CreateFieldReaderAsync();
TiffImageFileDirectoryEntry entry = ifd.FindEntry((TiffTag)0x1234);
Assert.Equal((TiffTag)0x1234, entry.Tag);
// Byte
await TestInvalidConversionAsync <byte>(fieldReader, entry, nameof(fieldReader.ReadByteFieldAsync), refData.Length);
// SSbyte
await TestInvalidConversionAsync <sbyte>(fieldReader, entry, nameof(fieldReader.ReadSByteFieldAsync), refData.Length);
// Short
await TestInvalidConversionAsync <ushort>(fieldReader, entry, nameof(fieldReader.ReadShortFieldAsync), refData.Length);
// SShort
await TestInvalidConversionAsync <short>(fieldReader, entry, nameof(fieldReader.ReadSShortFieldAsync), refData.Length);
// Long
await TestInvalidConversionAsync <uint>(fieldReader, entry, nameof(fieldReader.ReadLongFieldAsync), refData.Length);
// SLong
await TestInvalidConversionAsync <int>(fieldReader, entry, nameof(fieldReader.ReadSLongFieldAsync), refData.Length);
// Float
await TestInvalidConversionAsync <float>(fieldReader, entry, nameof(fieldReader.ReadFloatFieldAsync), refData.Length);
// Double
await TestInvalidConversionAsync <double>(fieldReader, entry, nameof(fieldReader.ReadDoubleFieldAsync), refData.Length);
// Rational
await TestInvalidConversionAsync <TiffRational>(fieldReader, entry, nameof(fieldReader.ReadRationalFieldAsync), refData.Length);
// SRational
await TestValidConversionAsync(fieldReader, entry, nameof(fieldReader.ReadSRationalFieldAsync), refData);
}
}
