private string GetTagDataString(int tagType)
{
try
{
var bytes = Directory.GetByteArray(tagType);
if (bytes == null)
{
return(Directory.GetString(tagType));
}
var reader = new ByteArrayReader(bytes);
var iccTagType = (IccTagType)reader.GetInt32(0);
switch (iccTagType)
{
case IccTagType.Text:
{
#if !NETSTANDARD1_3
try
{
return(Encoding.ASCII.GetString(bytes, 8, bytes.Length - 8 - 1));
}
catch
#endif
{
return(Encoding.UTF8.GetString(bytes, 8, bytes.Length - 8 - 1));
}
}
case IccTagType.Desc:
{
var stringLength = reader.GetInt32(8);
return(Encoding.UTF8.GetString(bytes, 12, stringLength - 1));
}
case IccTagType.Sig:
{
return(IccReader.GetStringFromUInt32(reader.GetUInt32(8)));
}
case IccTagType.Meas:
{
var observerType = reader.GetInt32(8);
var x = reader.GetS15Fixed16(12);
var y = reader.GetS15Fixed16(16);
var z = reader.GetS15Fixed16(20);
var geometryType = reader.GetInt32(24);
var flare = reader.GetS15Fixed16(28);
var illuminantType = reader.GetInt32(32);
string observerString;
switch (observerType)
{
case 0:
observerString = "Unknown";
break;
case 1:
observerString = "1931 2\u00b0";
break;
case 2:
observerString = "1964 10\u00b0";
break;
default:
observerString = $"Unknown ({observerType})";
break;
}
string geometryString;
switch (geometryType)
{
case 0:
geometryString = "Unknown";
break;
case 1:
geometryString = "0/45 or 45/0";
break;
case 2:
geometryString = "0/d or d/0";
break;
default:
geometryString = $"Unknown ({observerType})";
break;
}
string illuminantString;
switch (illuminantType)
{
case 0:
illuminantString = "unknown";
break;
case 1:
illuminantString = "D50";
break;
case 2:
illuminantString = "D65";
break;
case 3:
illuminantString = "D93";
break;
case 4:
illuminantString = "F2";
break;
case 5:
illuminantString = "D55";
break;
case 6:
illuminantString = "A";
break;
case 7:
illuminantString = "Equi-Power (E)";
break;
case 8:
illuminantString = "F8";
break;
default:
illuminantString = $"Unknown ({illuminantType})";
break;
}
return($"{observerString} Observer, Backing ({x:0.###}, {y:0.###}, {z:0.###}), Geometry {geometryString}, Flare {(long)Math.Round(flare*100)}%, Illuminant {illuminantString}");
}
case IccTagType.XyzArray:
{
var res = new StringBuilder();
var count = (bytes.Length - 8) / 12;
for (var i = 0; i < count; i++)
{
var x = reader.GetS15Fixed16(8 + i * 12);
var y = reader.GetS15Fixed16(8 + i * 12 + 4);
var z = reader.GetS15Fixed16(8 + i * 12 + 8);
if (i > 0)
{
res.Append(", ");
}
res.AppendFormat("({0:0.####}, {1:0.####}, {2:0.####})", x, y, z);
}
return(res.ToString());
}
case IccTagType.Mluc:
{
var int1 = reader.GetInt32(8);
var res = new StringBuilder();
res.Append(int1);
for (var i = 0; i < int1; i++)
{
var str = IccReader.GetStringFromUInt32(reader.GetUInt32(16 + i * 12));
var len = reader.GetInt32(16 + i * 12 + 4);
var ofs = reader.GetInt32(16 + i * 12 + 8);
string name;
try
{
name = Encoding.BigEndianUnicode.GetString(bytes, ofs, len);
}
catch
{
name = Encoding.UTF8.GetString(bytes, ofs, len);
}
res.Append(" ").Append(str).Append("(").Append(name).Append(")");
}
return(res.ToString());
}
case IccTagType.Curv:
{
var num = reader.GetInt32(8);
var res = new StringBuilder();
for (var i = 0; i < num; i++)
{
if (i != 0)
{
res.Append(", ");
}
res.Append(FormatDoubleAsString(reader.GetUInt16(12 + i * 2) / 65535.0, 7, false));
}
return(res.ToString());
}
default:
{
return($"{IccReader.GetStringFromUInt32(unchecked((uint)iccTagType))} (0x{(int)iccTagType:X8}): {bytes.Length} bytes");
}
}
}
catch (IOException)
{
// TODO decode these values during IccReader.extract so we can report any errors at that time
// It is convention to return null if a description cannot be formulated.
// If an error is to be reported, it should be done during the extraction process.
return(null);
}
}