public void CanFinalizeShortTag()
{
var artist = "Bob";
var tag = new Tag <char>
{
DataType = TagDataType.ASCII,
ID = (ushort)BaselineTags.Artist,
Length = (uint)artist.Length + 1,
Values = artist.ToASCIIArray()
};
using (var stream = new TiffStreamWriter())
{
stream.WriteDWord(1);
stream.WriteTagPlaceholder(tag);
stream.FinalizeTag(tag);
var data = stream.ToArray();
Assert.Equal(4u, tag.Offset);
Assert.Equal(4u, tag.Length);
Assert.Equal(16, data.Length);
Assert.Equal(artist, Encoding.ASCII.GetString(tag.RawValue).Trim('\0'));
}
}
public void CanWriteTagPlaceholder()
{
var tag = new Tag
{
DataType = TagDataType.Short,
ID = (ushort)BaselineTags.BitsPerSample,
Length = 1
};
using (var stream = new TiffStreamWriter())
{
stream.WriteTagPlaceholder(tag);
var data = stream.ToArray();
Assert.True(data.SequenceEqual(new byte[] { 0x02, 0x01, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }));
}
using (var stream = new TiffStreamWriter(forceBigEndian: true))
{
stream.WriteTagPlaceholder(tag);
var data = stream.ToArray();
Assert.True(data.SequenceEqual(new byte[] { 0x01, 0x02, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }));
}
}
public void CanFinalizeLongTag()
{
var artist = "Ansel Adams";
var tag = new Tag <char>
{
DataType = TagDataType.ASCII,
ID = (ushort)BaselineTags.Artist,
Length = (uint)artist.Length + 1,
Values = artist.ToASCIIArray()
};
using (var stream = new TiffStreamWriter())
{
stream.WriteDWord(1);
stream.WriteTagPlaceholder(tag);
stream.FinalizeTag(tag);
var data = stream.ToArray();
Assert.Equal(4u, tag.Offset);
Assert.Equal(12u, tag.Length);
Assert.Equal(28, data.Length);
Assert.True(tag.RawValue.SequenceEqual(BitConverter.GetBytes(16u)));
}
}
public void WriteTagPlaceholderUpdatesOffset()
{
var tag = new Tag
{
DataType = TagDataType.ASCII,
ID = (ushort)BaselineTags.Artist,
Length = 1
};
using (var stream = new TiffStreamWriter())
{
stream.WriteTagPlaceholder(tag);
stream.WriteTagPlaceholder(tag);
Assert.Equal(24, stream.Length);
Assert.Equal(12u, tag.Offset);
}
}