Struct exif::Tag

pub struct Tag(pub Context, pub u16);

A tag of a TIFF field.

Some well-known tags are provided as associated constants of this type. The constant names follow the Exif specification but not the Rust naming conventions.

Methods

impl Tag

pub fn context(self) -> Context

Returns the context of the tag.

Examples

use exif::{Context, Tag};
assert_eq!(Tag::DateTime.context(), Context::Tiff);
assert_eq!(Tag::ExposureTime.context(), Context::Exif);

pub fn number(self) -> u16

Returns the tag number.

Examples

use exif::Tag;
assert_eq!(Tag::DateTime.number(), 0x132);

pub fn description(&self) -> Option<&str>

Returns the description of the tag.

pub fn default_value(&self) -> Option<Value>

Returns the default value of the tag. None is returned if it is not defined in the standard or it depends on the context.

impl Tag

pub const ExifIFDPointer: Tag

ExifIFDPointer: Tag = Tag(Context::Tiff, 34665)

A pointer to the Exif IFD. This is used for the internal structure of Exif data and will not be returned to the user.

pub const GPSInfoIFDPointer: Tag

GPSInfoIFDPointer: Tag = Tag(Context::Tiff, 34853)

A pointer to the GPS IFD. This is used for the internal structure of Exif data and will not be returned to the user.

pub const InteropIFDPointer: Tag

InteropIFDPointer: Tag = Tag(Context::Exif, 40965)

A pointer to the interoperability IFD. This is used for the internal structure of Exif data and will not be returned to the user.

pub const ImageWidth: Tag

ImageWidth: Tag = Tag(Context::Tiff, 256)

pub const ImageLength: Tag

ImageLength: Tag = Tag(Context::Tiff, 257)

pub const BitsPerSample: Tag

BitsPerSample: Tag = Tag(Context::Tiff, 258)

pub const Compression: Tag

Compression: Tag = Tag(Context::Tiff, 259)

pub const PhotometricInterpretation: Tag

PhotometricInterpretation: Tag = Tag(Context::Tiff, 262)

pub const ImageDescription: Tag

ImageDescription: Tag = Tag(Context::Tiff, 270)

pub const Make: Tag

Make: Tag = Tag(Context::Tiff, 271)

pub const Model: Tag

Model: Tag = Tag(Context::Tiff, 272)

pub const StripOffsets: Tag

StripOffsets: Tag = Tag(Context::Tiff, 273)

pub const Orientation: Tag

Orientation: Tag = Tag(Context::Tiff, 274)

pub const SamplesPerPixel: Tag

SamplesPerPixel: Tag = Tag(Context::Tiff, 277)

pub const RowsPerStrip: Tag

RowsPerStrip: Tag = Tag(Context::Tiff, 278)

pub const StripByteCounts: Tag

StripByteCounts: Tag = Tag(Context::Tiff, 279)

pub const XResolution: Tag

XResolution: Tag = Tag(Context::Tiff, 282)

pub const YResolution: Tag

YResolution: Tag = Tag(Context::Tiff, 283)

pub const PlanarConfiguration: Tag

PlanarConfiguration: Tag = Tag(Context::Tiff, 284)

pub const ResolutionUnit: Tag

ResolutionUnit: Tag = Tag(Context::Tiff, 296)

pub const TransferFunction: Tag

TransferFunction: Tag = Tag(Context::Tiff, 301)

pub const Software: Tag

Software: Tag = Tag(Context::Tiff, 305)

pub const DateTime: Tag

DateTime: Tag = Tag(Context::Tiff, 306)

pub const Artist: Tag

Artist: Tag = Tag(Context::Tiff, 315)

pub const WhitePoint: Tag

WhitePoint: Tag = Tag(Context::Tiff, 318)

pub const PrimaryChromaticities: Tag

PrimaryChromaticities: Tag = Tag(Context::Tiff, 319)

pub const TileOffsets: Tag

TileOffsets: Tag = Tag(Context::Tiff, 324)

pub const TileByteCounts: Tag

TileByteCounts: Tag = Tag(Context::Tiff, 325)

pub const JPEGInterchangeFormat: Tag

JPEGInterchangeFormat: Tag = Tag(Context::Tiff, 513)

pub const JPEGInterchangeFormatLength: Tag

JPEGInterchangeFormatLength: Tag = Tag(Context::Tiff, 514)

pub const YCbCrCoefficients: Tag

YCbCrCoefficients: Tag = Tag(Context::Tiff, 529)

pub const YCbCrSubSampling: Tag

YCbCrSubSampling: Tag = Tag(Context::Tiff, 530)

pub const YCbCrPositioning: Tag

YCbCrPositioning: Tag = Tag(Context::Tiff, 531)

pub const ReferenceBlackWhite: Tag

ReferenceBlackWhite: Tag = Tag(Context::Tiff, 532)

pub const Copyright: Tag

Copyright: Tag = Tag(Context::Tiff, 33432)

pub const ExposureTime: Tag

ExposureTime: Tag = Tag(Context::Exif, 33434)

pub const FNumber: Tag

FNumber: Tag = Tag(Context::Exif, 33437)

pub const ExposureProgram: Tag

ExposureProgram: Tag = Tag(Context::Exif, 34850)

pub const SpectralSensitivity: Tag

SpectralSensitivity: Tag = Tag(Context::Exif, 34852)

pub const PhotographicSensitivity: Tag

PhotographicSensitivity: Tag = Tag(Context::Exif, 34855)

pub const OECF: Tag

OECF: Tag = Tag(Context::Exif, 34856)

pub const SensitivityType: Tag

SensitivityType: Tag = Tag(Context::Exif, 34864)

pub const StandardOutputSensitivity: Tag

StandardOutputSensitivity: Tag = Tag(Context::Exif, 34865)

pub const RecommendedExposureIndex: Tag

RecommendedExposureIndex: Tag = Tag(Context::Exif, 34866)

pub const ISOSpeed: Tag

ISOSpeed: Tag = Tag(Context::Exif, 34867)

pub const ISOSpeedLatitudeyyy: Tag

ISOSpeedLatitudeyyy: Tag = Tag(Context::Exif, 34868)

pub const ISOSpeedLatitudezzz: Tag

ISOSpeedLatitudezzz: Tag = Tag(Context::Exif, 34869)

pub const ExifVersion: Tag

ExifVersion: Tag = Tag(Context::Exif, 36864)

pub const DateTimeOriginal: Tag

DateTimeOriginal: Tag = Tag(Context::Exif, 36867)

pub const DateTimeDigitized: Tag

DateTimeDigitized: Tag = Tag(Context::Exif, 36868)

pub const OffsetTime: Tag

OffsetTime: Tag = Tag(Context::Exif, 36880)

pub const OffsetTimeOriginal: Tag

OffsetTimeOriginal: Tag = Tag(Context::Exif, 36881)

pub const OffsetTimeDigitized: Tag

OffsetTimeDigitized: Tag = Tag(Context::Exif, 36882)

pub const ComponentsConfiguration: Tag

ComponentsConfiguration: Tag = Tag(Context::Exif, 37121)

pub const CompressedBitsPerPixel: Tag

CompressedBitsPerPixel: Tag = Tag(Context::Exif, 37122)

pub const ShutterSpeedValue: Tag

ShutterSpeedValue: Tag = Tag(Context::Exif, 37377)

pub const ApertureValue: Tag

ApertureValue: Tag = Tag(Context::Exif, 37378)

pub const BrightnessValue: Tag

BrightnessValue: Tag = Tag(Context::Exif, 37379)

pub const ExposureBiasValue: Tag

ExposureBiasValue: Tag = Tag(Context::Exif, 37380)

pub const MaxApertureValue: Tag

MaxApertureValue: Tag = Tag(Context::Exif, 37381)

pub const SubjectDistance: Tag

SubjectDistance: Tag = Tag(Context::Exif, 37382)

pub const MeteringMode: Tag

MeteringMode: Tag = Tag(Context::Exif, 37383)

pub const LightSource: Tag

LightSource: Tag = Tag(Context::Exif, 37384)

pub const Flash: Tag

Flash: Tag = Tag(Context::Exif, 37385)

pub const FocalLength: Tag

FocalLength: Tag = Tag(Context::Exif, 37386)

pub const SubjectArea: Tag

SubjectArea: Tag = Tag(Context::Exif, 37396)

pub const MakerNote: Tag

MakerNote: Tag = Tag(Context::Exif, 37500)

pub const UserComment: Tag

UserComment: Tag = Tag(Context::Exif, 37510)

pub const SubSecTime: Tag

SubSecTime: Tag = Tag(Context::Exif, 37520)

pub const SubSecTimeOriginal: Tag

SubSecTimeOriginal: Tag = Tag(Context::Exif, 37521)

pub const SubSecTimeDigitized: Tag

SubSecTimeDigitized: Tag = Tag(Context::Exif, 37522)

pub const Temperature: Tag

Temperature: Tag = Tag(Context::Exif, 37888)

pub const Humidity: Tag

Humidity: Tag = Tag(Context::Exif, 37889)

pub const Pressure: Tag

Pressure: Tag = Tag(Context::Exif, 37890)

pub const WaterDepth: Tag

WaterDepth: Tag = Tag(Context::Exif, 37891)

pub const Acceleration: Tag

Acceleration: Tag = Tag(Context::Exif, 37892)

pub const CameraElevationAngle: Tag

CameraElevationAngle: Tag = Tag(Context::Exif, 37893)

pub const FlashpixVersion: Tag

FlashpixVersion: Tag = Tag(Context::Exif, 40960)

pub const ColorSpace: Tag

ColorSpace: Tag = Tag(Context::Exif, 40961)

pub const PixelXDimension: Tag

PixelXDimension: Tag = Tag(Context::Exif, 40962)

pub const PixelYDimension: Tag

PixelYDimension: Tag = Tag(Context::Exif, 40963)

pub const RelatedSoundFile: Tag

RelatedSoundFile: Tag = Tag(Context::Exif, 40964)

pub const FlashEnergy: Tag

FlashEnergy: Tag = Tag(Context::Exif, 41483)

pub const SpatialFrequencyResponse: Tag

SpatialFrequencyResponse: Tag = Tag(Context::Exif, 41484)

pub const FocalPlaneXResolution: Tag

FocalPlaneXResolution: Tag = Tag(Context::Exif, 41486)

pub const FocalPlaneYResolution: Tag

FocalPlaneYResolution: Tag = Tag(Context::Exif, 41487)

pub const FocalPlaneResolutionUnit: Tag

FocalPlaneResolutionUnit: Tag = Tag(Context::Exif, 41488)

pub const SubjectLocation: Tag

SubjectLocation: Tag = Tag(Context::Exif, 41492)

pub const ExposureIndex: Tag

ExposureIndex: Tag = Tag(Context::Exif, 41493)

pub const SensingMethod: Tag

SensingMethod: Tag = Tag(Context::Exif, 41495)

pub const FileSource: Tag

FileSource: Tag = Tag(Context::Exif, 41728)

pub const SceneType: Tag

SceneType: Tag = Tag(Context::Exif, 41729)

pub const CFAPattern: Tag

CFAPattern: Tag = Tag(Context::Exif, 41730)

pub const CustomRendered: Tag

CustomRendered: Tag = Tag(Context::Exif, 41985)

pub const ExposureMode: Tag

ExposureMode: Tag = Tag(Context::Exif, 41986)

pub const WhiteBalance: Tag

WhiteBalance: Tag = Tag(Context::Exif, 41987)

pub const DigitalZoomRatio: Tag

DigitalZoomRatio: Tag = Tag(Context::Exif, 41988)

pub const FocalLengthIn35mmFilm: Tag

FocalLengthIn35mmFilm: Tag = Tag(Context::Exif, 41989)

pub const SceneCaptureType: Tag

SceneCaptureType: Tag = Tag(Context::Exif, 41990)

pub const GainControl: Tag

GainControl: Tag = Tag(Context::Exif, 41991)

pub const Contrast: Tag

Contrast: Tag = Tag(Context::Exif, 41992)

pub const Saturation: Tag

Saturation: Tag = Tag(Context::Exif, 41993)

pub const Sharpness: Tag

Sharpness: Tag = Tag(Context::Exif, 41994)

pub const DeviceSettingDescription: Tag

DeviceSettingDescription: Tag = Tag(Context::Exif, 41995)

pub const SubjectDistanceRange: Tag

SubjectDistanceRange: Tag = Tag(Context::Exif, 41996)

pub const ImageUniqueID: Tag

ImageUniqueID: Tag = Tag(Context::Exif, 42016)

pub const CameraOwnerName: Tag

CameraOwnerName: Tag = Tag(Context::Exif, 42032)

pub const BodySerialNumber: Tag

BodySerialNumber: Tag = Tag(Context::Exif, 42033)

pub const LensSpecification: Tag

LensSpecification: Tag = Tag(Context::Exif, 42034)

pub const LensMake: Tag

LensMake: Tag = Tag(Context::Exif, 42035)

pub const LensModel: Tag

LensModel: Tag = Tag(Context::Exif, 42036)

pub const LensSerialNumber: Tag

LensSerialNumber: Tag = Tag(Context::Exif, 42037)

pub const Gamma: Tag

Gamma: Tag = Tag(Context::Exif, 42240)

pub const GPSVersionID: Tag

GPSVersionID: Tag = Tag(Context::Gps, 0)

pub const GPSLatitudeRef: Tag

GPSLatitudeRef: Tag = Tag(Context::Gps, 1)

pub const GPSLatitude: Tag

GPSLatitude: Tag = Tag(Context::Gps, 2)

pub const GPSLongitudeRef: Tag

GPSLongitudeRef: Tag = Tag(Context::Gps, 3)

pub const GPSLongitude: Tag

GPSLongitude: Tag = Tag(Context::Gps, 4)

pub const GPSAltitudeRef: Tag

GPSAltitudeRef: Tag = Tag(Context::Gps, 5)

pub const GPSAltitude: Tag

GPSAltitude: Tag = Tag(Context::Gps, 6)

pub const GPSTimeStamp: Tag

GPSTimeStamp: Tag = Tag(Context::Gps, 7)

pub const GPSSatellites: Tag

GPSSatellites: Tag = Tag(Context::Gps, 8)

pub const GPSStatus: Tag

GPSStatus: Tag = Tag(Context::Gps, 9)

pub const GPSMeasureMode: Tag

GPSMeasureMode: Tag = Tag(Context::Gps, 10)

pub const GPSDOP: Tag

GPSDOP: Tag = Tag(Context::Gps, 11)

pub const GPSSpeedRef: Tag

GPSSpeedRef: Tag = Tag(Context::Gps, 12)

pub const GPSSpeed: Tag

GPSSpeed: Tag = Tag(Context::Gps, 13)

pub const GPSTrackRef: Tag

GPSTrackRef: Tag = Tag(Context::Gps, 14)

pub const GPSTrack: Tag

GPSTrack: Tag = Tag(Context::Gps, 15)

pub const GPSImgDirectionRef: Tag

GPSImgDirectionRef: Tag = Tag(Context::Gps, 16)

pub const GPSImgDirection: Tag

GPSImgDirection: Tag = Tag(Context::Gps, 17)

pub const GPSMapDatum: Tag

GPSMapDatum: Tag = Tag(Context::Gps, 18)

pub const GPSDestLatitudeRef: Tag

GPSDestLatitudeRef: Tag = Tag(Context::Gps, 19)

pub const GPSDestLatitude: Tag

GPSDestLatitude: Tag = Tag(Context::Gps, 20)

pub const GPSDestLongitudeRef: Tag

GPSDestLongitudeRef: Tag = Tag(Context::Gps, 21)

pub const GPSDestLongitude: Tag

GPSDestLongitude: Tag = Tag(Context::Gps, 22)

pub const GPSDestBearingRef: Tag

GPSDestBearingRef: Tag = Tag(Context::Gps, 23)

pub const GPSDestBearing: Tag

GPSDestBearing: Tag = Tag(Context::Gps, 24)

pub const GPSDestDistanceRef: Tag

GPSDestDistanceRef: Tag = Tag(Context::Gps, 25)

pub const GPSDestDistance: Tag

GPSDestDistance: Tag = Tag(Context::Gps, 26)

pub const GPSProcessingMethod: Tag

GPSProcessingMethod: Tag = Tag(Context::Gps, 27)

pub const GPSAreaInformation: Tag

GPSAreaInformation: Tag = Tag(Context::Gps, 28)

pub const GPSDateStamp: Tag

GPSDateStamp: Tag = Tag(Context::Gps, 29)

pub const GPSDifferential: Tag

GPSDifferential: Tag = Tag(Context::Gps, 30)

pub const GPSHPositioningError: Tag

GPSHPositioningError: Tag = Tag(Context::Gps, 31)

pub const InteroperabilityIndex: Tag

InteroperabilityIndex: Tag = Tag(Context::Interop, 1)

Trait Implementations

impl Debug for Tag

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Copy for Tag

impl Clone for Tag

fn clone(&self) -> Tag

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl PartialEq for Tag

fn eq(&self, other: &Tag) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Tag) -> bool

This method tests for !=.

impl Eq for Tag

impl Hash for Tag

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].

impl Display for Tag

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.