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.

A non-predefined tag can also be specified by the context and the number as in Tag(Context::Tiff, 0x100).

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 ImageWidth: Tag

pub const ImageLength: Tag

pub const BitsPerSample: Tag

pub const Compression: Tag

pub const PhotometricInterpretation: Tag

pub const ImageDescription: Tag

pub const Make: Tag

pub const Model: Tag

pub const StripOffsets: Tag

pub const Orientation: Tag

pub const SamplesPerPixel: Tag

pub const RowsPerStrip: Tag

pub const StripByteCounts: Tag

pub const XResolution: Tag

pub const YResolution: Tag

pub const PlanarConfiguration: Tag

pub const ResolutionUnit: Tag

pub const TransferFunction: Tag

pub const Software: Tag

pub const DateTime: Tag

pub const Artist: Tag

pub const WhitePoint: Tag

pub const PrimaryChromaticities: Tag

pub const TileOffsets: Tag

pub const TileByteCounts: Tag

pub const JPEGInterchangeFormat: Tag

pub const JPEGInterchangeFormatLength: Tag

pub const YCbCrCoefficients: Tag

pub const YCbCrSubSampling: Tag

pub const YCbCrPositioning: Tag

pub const ReferenceBlackWhite: Tag

pub const Copyright: Tag

pub const ExposureTime: Tag

pub const FNumber: Tag

pub const ExposureProgram: Tag

pub const SpectralSensitivity: Tag

pub const PhotographicSensitivity: Tag

pub const OECF: Tag

pub const SensitivityType: Tag

pub const StandardOutputSensitivity: Tag

pub const RecommendedExposureIndex: Tag

pub const ISOSpeed: Tag

pub const ISOSpeedLatitudeyyy: Tag

pub const ISOSpeedLatitudezzz: Tag

pub const ExifVersion: Tag

pub const DateTimeOriginal: Tag

pub const DateTimeDigitized: Tag

pub const OffsetTime: Tag

pub const OffsetTimeOriginal: Tag

pub const OffsetTimeDigitized: Tag

pub const ComponentsConfiguration: Tag

pub const CompressedBitsPerPixel: Tag

pub const ShutterSpeedValue: Tag

pub const ApertureValue: Tag

pub const BrightnessValue: Tag

pub const ExposureBiasValue: Tag

pub const MaxApertureValue: Tag

pub const SubjectDistance: Tag

pub const MeteringMode: Tag

pub const LightSource: Tag

pub const Flash: Tag

pub const FocalLength: Tag

pub const SubjectArea: Tag

pub const MakerNote: Tag

pub const UserComment: Tag

pub const SubSecTime: Tag

pub const SubSecTimeOriginal: Tag

pub const SubSecTimeDigitized: Tag

pub const Temperature: Tag

pub const Humidity: Tag

pub const Pressure: Tag

pub const WaterDepth: Tag

pub const Acceleration: Tag

pub const CameraElevationAngle: Tag

pub const FlashpixVersion: Tag

pub const ColorSpace: Tag

pub const PixelXDimension: Tag

pub const PixelYDimension: Tag

pub const RelatedSoundFile: Tag

pub const FlashEnergy: Tag

pub const SpatialFrequencyResponse: Tag

pub const FocalPlaneXResolution: Tag

pub const FocalPlaneYResolution: Tag

pub const FocalPlaneResolutionUnit: Tag

pub const SubjectLocation: Tag

pub const ExposureIndex: Tag

pub const SensingMethod: Tag

pub const FileSource: Tag

pub const SceneType: Tag

pub const CFAPattern: Tag

pub const CustomRendered: Tag

pub const ExposureMode: Tag

pub const WhiteBalance: Tag

pub const DigitalZoomRatio: Tag

pub const FocalLengthIn35mmFilm: Tag

pub const SceneCaptureType: Tag

pub const GainControl: Tag

pub const Contrast: Tag

pub const Saturation: Tag

pub const Sharpness: Tag

pub const DeviceSettingDescription: Tag

pub const SubjectDistanceRange: Tag

pub const ImageUniqueID: Tag

pub const CameraOwnerName: Tag

pub const BodySerialNumber: Tag

pub const LensSpecification: Tag

pub const LensMake: Tag

pub const LensModel: Tag

pub const LensSerialNumber: Tag

pub const CompositeImage: Tag

pub const SourceImageNumberOfCompositeImage: Tag

pub const SourceExposureTimesOfCompositeImage: Tag

pub const Gamma: Tag

pub const GPSVersionID: Tag

pub const GPSLatitudeRef: Tag

pub const GPSLatitude: Tag

pub const GPSLongitudeRef: Tag

pub const GPSLongitude: Tag

pub const GPSAltitudeRef: Tag

pub const GPSAltitude: Tag

pub const GPSTimeStamp: Tag

pub const GPSSatellites: Tag

pub const GPSStatus: Tag

pub const GPSMeasureMode: Tag

pub const GPSDOP: Tag

pub const GPSSpeedRef: Tag

pub const GPSSpeed: Tag

pub const GPSTrackRef: Tag

pub const GPSTrack: Tag

pub const GPSImgDirectionRef: Tag

pub const GPSImgDirection: Tag

pub const GPSMapDatum: Tag

pub const GPSDestLatitudeRef: Tag

pub const GPSDestLatitude: Tag

pub const GPSDestLongitudeRef: Tag

pub const GPSDestLongitude: Tag

pub const GPSDestBearingRef: Tag

pub const GPSDestBearing: Tag

pub const GPSDestDistanceRef: Tag

pub const GPSDestDistance: Tag

pub const GPSProcessingMethod: Tag

pub const GPSAreaInformation: Tag

pub const GPSDateStamp: Tag

pub const GPSDifferential: Tag

pub const GPSHPositioningError: Tag

pub const InteroperabilityIndex: Tag

Trait Implementations

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 Copy for Tag

impl Debug for Tag

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

Formats the value using the given formatter.

impl Display for Tag

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

Formats the value using the given formatter.

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 Ord for Tag

fn cmp(&self, other: &Tag) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use] fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use] fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use] fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<Tag> 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 PartialOrd<Tag> for Tag

fn partial_cmp(&self, other: &Tag) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for Tag

impl StructuralPartialEq for Tag