Class FieldBit

Field bits (flags) for tags.

Inheritance

System.Object

FieldBit

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: BitMiracle.LibTiff.Classic

Assembly: BitMiracle.LibTiff.NET.dll

Syntax

public static class FieldBit

Remarks

Field bits used to indicate fields that have been set in a directory, and to reference fields when manipulating a directory.

Fields

Codec

This value is used as a base (starting) value for codec-private tags.

Declaration

public const short Codec = 66

Field Value

Type	Description
System.Int16

Custom

This value is used to signify custom tags.

Declaration

public const short Custom = 65

Field Value

Type	Description
System.Int16

Ignore

This value is used to signify tags that are to be processed but otherwise ignored.
This permits antiquated tags to be quietly read and discarded. Note that a bit is allocated for ignored tags; this is understood by the directory reading logic which uses this fact to avoid special-case handling.

Declaration

public const short Ignore = 0

Field Value

Type	Description
System.Int16

Last

Last usable value for field bit. All tags values should be less than this value.

Declaration

public const short Last = 127

Field Value

Type	Description
System.Int16

Pseudo

This value is used to signify pseudo-tags.
Pseudo-tags don't normally need field bits since they are not written to an output file (by definition). The library also has express logic to always query a codec for a pseudo-tag so allocating a field bit for one is a waste. If codec wants to promote the notion of a pseudo-tag being set or unset then it can do using internal state flags without polluting the field bit space defined for real tags.

Declaration

public const short Pseudo = 0

Field Value

Type	Description
System.Int16