public TiffImage(string path)
{
using (var stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read))
{
Header = new FileHeader(stream);
var offset = Header.Offset;
var ifds = new List <ImageFileDirectory>();
while (offset != 0)
{
stream.Position = offset;
var newIfd = new ImageFileDirectory(stream);
offset = newIfd.Offset;
ifds.Add(newIfd);
}
IFDs = ifds.ToArray();
var photometricInterpretation = (PhotometricInterpretation)(ushort)ifds[0].Tags.Where(a => a.Code == Tag.TagCode.PhotometricInterpretation).FirstOrDefault().Data;
switch (photometricInterpretation)
{
case PhotometricInterpretation.RGB:
ReadRGB(stream);
break;
case PhotometricInterpretation.Separated:
var samples = ifds[0].Tags.FirstOrDefault(a => a.Code == Tag.TagCode.SamplesPerPixel);
if (samples == null)
{
throw new ArgumentException("The given files does not specify a number of samples per pixel.");
}
Channels = (int)samples.Value;
ReadSeparated(stream);
break;
}
}
}
private bool SaveRGB(string path)
{
try
{
DataStructure = ImageDataStructure.Rgb;
using (var stream = new FileStream(path, FileMode.Create))
{
var header = new FileHeader()
{
ByteOrder = FileHeader.TiffByteOrder.II,
Offset = 8
};
header.Write(stream);
var ifd = new ImageFileDirectory()
{
Tags = new List <Tag>()
{
new Tag()
{
Code = Tag.TagCode.NewSubfileType,
Data = 0,
DataType = Tag.TagType.Long,
Count = 1,
Value = 0
},
new Tag()
{
Code = Tag.TagCode.ImageWidth,
Data = (ushort)Width,
DataType = Tag.TagType.Short,
Count = 1,
Value = (ushort)Width
},
new Tag()
{
Code = Tag.TagCode.ImageLength,
Data = (ushort)Height,
DataType = Tag.TagType.Short,
Count = 1,
Value = (ushort)Height
},
new Tag()
{
Code = Tag.TagCode.BitsPerSample,
Data = new ushort[] { 8, 8, 8 },
DataType = Tag.TagType.Short,
Count = 3,
Value = 0
},
new Tag()
{
Code = Tag.TagCode.Compression,
Data = (ushort)Tag.CompressionType.None,
DataType = Tag.TagType.Short,
Count = 1,
Value = (uint)Tag.CompressionType.None
},
new Tag()
{
Code = Tag.TagCode.PhotometricInterpretation,
Data = PhotometricInterpretation.RGB,
DataType = Tag.TagType.Short,
Count = 1,
Value = (uint)PhotometricInterpretation.RGB
},
new Tag()
{
Code = Tag.TagCode.StripOffsets,
Data = 0,
DataType = Tag.TagType.Long,
Count = 1,
Value = 0
},
new Tag()
{
Code = Tag.TagCode.Orientation,
Data = (ushort)1,
DataType = Tag.TagType.Short,
Count = 1,
Value = 1
},
new Tag()
{
Code = Tag.TagCode.SamplesPerPixel,
Count = 1,
Data = (ushort)3,
DataType = Tag.TagType.Short,
Value = 3
},
new Tag()
{
Code = Tag.TagCode.RowsPerStrip,
Data = (ushort)Height,
DataType = Tag.TagType.Short,
Count = 1,
Value = (ushort)Height
},
new Tag()
{
Code = Tag.TagCode.StripByteCounts,
Data = (uint)Height * 3,
DataType = Tag.TagType.Long,
Count = 1,
Value = (uint)Height * 3
},
new Tag()
{
Code = Tag.TagCode.XResolution,
Count = 1,
Data = 360f,
DataType = Tag.TagType.Rational
},
new Tag()
{
Code = Tag.TagCode.YResolution,
Count = 1,
Data = 360f,
DataType = Tag.TagType.Rational
},
new Tag()
{
Code = Tag.TagCode.PlanarConfiguration,
Data = PlanarConfiguration.Chunky,
DataType = Tag.TagType.Short,
Count = 1,
Value = (uint)PlanarConfiguration.Chunky
},
new Tag()
{
Code = Tag.TagCode.ResolutionUnit,
Count = 1,
Data = (ushort)2,
DataType = Tag.TagType.Short,
Value = (ushort)2
}
}
};
var tagsOffset = header.ByteCount + ifd.ByteCount;
var tagDataCount = 0;
foreach (var item in ifd.Tags)
{
tagDataCount += item.DataSize;
}
var stripsTag = ifd.Tags.FirstOrDefault(a => a.Code == Tag.TagCode.StripOffsets);
stripsTag.Value = (uint)(tagsOffset + tagDataCount);
ifd.Write(stream, tagsOffset);
stream.Write(Data, 0, Data.Length);
}
}
catch (Exception)
{
return(false);
}
return(true);
}
