/// <summary>
/// Read the values of InteroperabilityIndex tag.
/// Field description: Indicates the identification of the Interoperability rule.
/// </summary>
/// <param name="tagReader">The tag reader to use.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> that fires if the user want to stop the current task.</param>
/// <returns>A <see cref="ValueTask{TiffValueCollection}"/> that completes when the value of the tag is read and return the read values.</returns>
public static ValueTask <string?> ReadInteroperabilityIndexAsync(this TiffTagReader tagReader, CancellationToken cancellationToken = default)
{
ValueTask <TiffValueCollection <string> > valueTask = tagReader.ReadASCIIFieldAsync((TiffTag)0x0001, cancellationToken);
if (valueTask.IsCompletedSuccessfully)
{
TiffValueCollection <string> result = valueTask.GetAwaiter().GetResult();
return(new ValueTask <string?>(result.GetFirstOrDefault()));
}
return(new ValueTask <string?>(TransformValueTaskAsync(valueTask)));
private static void DumpValueCollecionSimple <T>(TiffValueCollection <T> values)
{
Console.Write("[");
if (values.IsEmpty)
{
// Do nothing
}
else if (values.Count == 1)
{
Console.Write(values.GetFirstOrDefault());
}
else
{
for (int i = 0; i < values.Count; i++)
{
Console.Write(values[i]);
if (i != values.Count - 1)
{
Console.Write(", ");
}
}
}
Console.Write("]");
}
private static async Task DumpIfdEntryAsync(int index, TiffFieldReader fieldReader, TiffImageFileDirectoryEntry entry, CancellationToken cancellationToken)
{
string tagName = Enum.IsDefined(typeof(TiffTag), entry.Tag) ? $"{entry.Tag} ({(int)entry.Tag})" : ((int)entry.Tag).ToString();
string typeName = Enum.IsDefined(typeof(TiffFieldType), entry.Type) ? entry.Type.ToString() : "Unknown";
Console.Write($" Tag #{index}: {tagName}, {typeName}[{entry.ValueCount}].");
switch (entry.Type)
{
case TiffFieldType.Byte:
Console.Write(" Binary data not shown.");
break;
case TiffFieldType.ASCII:
TiffValueCollection <string> valuesAscii = await fieldReader.ReadASCIIFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
if (valuesAscii.IsEmpty)
{
// Do nothing
}
else if (valuesAscii.Count == 1)
{
Console.Write(" Value = " + valuesAscii.GetFirstOrDefault());
}
else
{
Console.WriteLine();
for (int i = 0; i < valuesAscii.Count; i++)
{
Console.Write($" [{i}] = {valuesAscii[i]}");
}
}
break;
case TiffFieldType.Short:
TiffValueCollection <ushort> valuesShort = await fieldReader.ReadShortFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesShort);
break;
case TiffFieldType.Long:
TiffValueCollection <uint> valuesLong = await fieldReader.ReadLongFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesLong);
break;
case TiffFieldType.Rational:
TiffValueCollection <TiffRational> valuesRational = await fieldReader.ReadRationalFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesRational);
break;
case TiffFieldType.SByte:
Console.Write(" Binary data not shown.");
break;
case TiffFieldType.Undefined:
Console.Write(" Binary data not shown.");
break;
case TiffFieldType.SShort:
TiffValueCollection <short> valuesSShort = await fieldReader.ReadSShortFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesSShort);
break;
case TiffFieldType.SLong:
TiffValueCollection <int> valuesSLong = await fieldReader.ReadSLongFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesSLong);
break;
case TiffFieldType.SRational:
TiffValueCollection <TiffSRational> valuesSRational = await fieldReader.ReadSRationalFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesSRational);
break;
case TiffFieldType.Float:
TiffValueCollection <float> valuesFloat = await fieldReader.ReadFloatFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesFloat);
break;
case TiffFieldType.Double:
TiffValueCollection <double> valuesDouble = await fieldReader.ReadDoubleFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesDouble);
break;
case TiffFieldType.IFD:
TiffValueCollection <TiffStreamOffset> valuesIfd = await fieldReader.ReadIFDFieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesIfd);
break;
case TiffFieldType.Long8:
TiffValueCollection <ulong> valuesLong8 = await fieldReader.ReadLong8FieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesLong8);
break;
case TiffFieldType.SLong8:
TiffValueCollection <long> valuesSLong8 = await fieldReader.ReadSLong8FieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesSLong8);
break;
case TiffFieldType.IFD8:
TiffValueCollection <TiffStreamOffset> valuesIfd8 = await fieldReader.ReadIFD8FieldAsync(entry, skipTypeValidation : true, cancellationToken : cancellationToken);
DumpValueCollecion(valuesIfd8);
break;
default:
Console.Write(" Unsupported field type.");
break;
}
Console.WriteLine();
}
static async Task <string?> TransformValueTaskAsync(ValueTask <TiffValueCollection <string> > valueTask)
{
TiffValueCollection <string> result = await valueTask.ConfigureAwait(false);
return(result.GetFirstOrDefault());
}
