public IccDirectory Extract([NotNull] IndexedReader reader)
{
// TODO review whether the 'tagPtr' values below really do require IndexedReader or whether SequentialReader may be used instead
var directory = new IccDirectory();
try
{
var profileByteCount = reader.GetInt32(IccDirectory.TagProfileByteCount);
directory.Set(IccDirectory.TagProfileByteCount, profileByteCount);
// For these tags, the int value of the tag is in fact its offset within the buffer.
Set4ByteString(directory, IccDirectory.TagCmmType, reader);
SetInt32(directory, IccDirectory.TagProfileVersion, reader);
Set4ByteString(directory, IccDirectory.TagProfileClass, reader);
Set4ByteString(directory, IccDirectory.TagColorSpace, reader);
Set4ByteString(directory, IccDirectory.TagProfileConnectionSpace, reader);
SetDate(directory, IccDirectory.TagProfileDateTime, reader);
Set4ByteString(directory, IccDirectory.TagSignature, reader);
Set4ByteString(directory, IccDirectory.TagPlatform, reader);
SetInt32(directory, IccDirectory.TagCmmFlags, reader);
Set4ByteString(directory, IccDirectory.TagDeviceMake, reader);
var model = reader.GetInt32(IccDirectory.TagDeviceModel);
if (model != 0)
{
directory.Set(IccDirectory.TagDeviceModel, model <= 0x20202020
? (object)model
: GetStringFromUInt32(unchecked ((uint)model)));
}
SetInt32(directory, IccDirectory.TagRenderingIntent, reader);
SetInt64(directory, IccDirectory.TagDeviceAttr, reader);
var xyz = new[] { reader.GetS15Fixed16(IccDirectory.TagXyzValues), reader.GetS15Fixed16(IccDirectory.TagXyzValues + 4), reader.GetS15Fixed16(IccDirectory.TagXyzValues + 8) };
directory.Set(IccDirectory.TagXyzValues, xyz);
// Process 'ICC tags'
var tagCount = reader.GetInt32(IccDirectory.TagTagCount);
directory.Set(IccDirectory.TagTagCount, tagCount);
for (var i = 0; i < tagCount; i++)
{
var pos = IccDirectory.TagTagCount + 4 + i * 12;
var tagType = reader.GetInt32(pos);
var tagPtr = reader.GetInt32(pos + 4);
var tagLen = reader.GetInt32(pos + 8);
var b = reader.GetBytes(tagPtr, tagLen);
directory.Set(tagType, b);
}
}
catch (Exception ex)
{
directory.AddError("Exception reading ICC profile: " + ex.Message);
}
return(directory);
}
private static void SetDate([NotNull] IccDirectory directory, int tagType, [NotNull] IndexedReader reader)
{
var year = reader.GetUInt16(tagType);
var month = reader.GetUInt16(tagType + 2);
var day = reader.GetUInt16(tagType + 4);
var hours = reader.GetUInt16(tagType + 6);
var minutes = reader.GetUInt16(tagType + 8);
var seconds = reader.GetUInt16(tagType + 10);
if (DateUtil.IsValidDate(year, month, day) &&
DateUtil.IsValidTime(hours, minutes, seconds))
{
directory.Set(tagType, new DateTime(year, month, day, hours, minutes, seconds, kind: DateTimeKind.Utc));
}
else
{
directory.AddError($"ICC data describes an invalid date/time: year={year} month={month} day={day} hour={hours} minute={minutes} second={seconds}");
}
}