private static async Task <uint[]> ReadIntegerArrayAsync_Internal(TiffIfdEntry entry, Stream stream, ByteOrder byteOrder)
{
switch (entry.Type)
{
case TiffType.Byte:
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
return(Enumerable.Range(0, entry.Count).Select(index => (uint)DataConverter.ToByte(data, index)).ToArray());
}
case TiffType.Short:
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
return(Enumerable.Range(0, entry.Count).Select(index => (uint)DataConverter.ToUInt16(data, index * 2, byteOrder)).ToArray());
}
case TiffType.Long:
case TiffType.Ifd:
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
return(Enumerable.Range(0, entry.Count).Select(index => DataConverter.ToUInt32(data, index * 4, byteOrder)).ToArray());
}
default:
throw new InvalidOperationException();
}
}
private static async Task <double[]> ReadDoubleArrayAsync_Internal(TiffIfdEntry entry, Stream stream, ByteOrder byteOrder)
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
return(Enumerable.Range(0, entry.Count).Select(index =>
{
return DataConverter.ToDouble(data, index * 8, byteOrder);
}).ToArray());
}
private static async Task <SignedRational[]> ReadSignedRationalArrayAsync_Internal(TiffIfdEntry entry, Stream stream, ByteOrder byteOrder)
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
return(Enumerable.Range(0, entry.Count).Select(index =>
{
var numerator = DataConverter.ToInt32(data, index * 8, byteOrder);
var denominator = DataConverter.ToInt32(data, index * 8 + 4, byteOrder);
return new SignedRational(numerator, denominator);
}).ToArray());
}
private static async Task <string> ReadStringAsync_Internal(TiffIfdEntry entry, Stream stream, ByteOrder byteOrder)
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
if (data[data.Length - 1] != 0)
{
throw new ImageFormatException("The retrieved string is not null terminated.");
}
return(Encoding.ASCII.GetString(data, 0, data.Length - 1));
}
private static async Task <TiffIfdReference[]> ReadIfdReferenceArrayAsync_Internal(TiffIfdEntry entry, Stream stream, ByteOrder byteOrder)
{
byte[] data = await entry.ReadDataAsync(stream, byteOrder);
return(Enumerable.Range(0, entry.Count).Select(index => new TiffIfdReference(DataConverter.ToUInt32(data, index * 4, byteOrder))).ToArray());
}
