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Add a struct for displaying a value in a tag-specific way.

This commit is contained in:
KAMADA Ken'ichi 2017-05-11 23:19:16 +09:00
parent 3736693836
commit 0d9551af0f
2 changed files with 254 additions and 146 deletions
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377
src/tag.rs
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@ -26,6 +26,7 @@
use std::fmt; use std::fmt;
use value;
use value::Value; use value::Value;
/// A tag of a TIFF field. /// A tag of a TIFF field.
@ -109,7 +110,7 @@ macro_rules! generate_well_known_tag_constants {
$( |$ctx:path| $( $( |$ctx:path| $(
// Copy the doc attribute to the actual definition. // Copy the doc attribute to the actual definition.
$( #[$attr:meta] )* $( #[$attr:meta] )*
($name:ident, $num:expr, $defval:expr, $desc:expr) ($name:ident, $num:expr, $defval:expr, $dispval:ident, $desc:expr)
),+, )+ ),+, )+
) => ( ) => (
/// A module that contains Exif tag constants. /// A module that contains Exif tag constants.
@ -138,18 +139,25 @@ macro_rules! generate_well_known_tag_constants {
// Use a separate module to avoid name conflicts between // Use a separate module to avoid name conflicts between
// const Tag and static TagInfo. // const Tag and static TagInfo.
mod tag_info { mod tag_info {
use std::fmt;
use value::Value;
use value::DefaultValue; use value::DefaultValue;
pub struct TagInfo { pub struct TagInfo {
pub name: &'static str, pub name: &'static str,
pub desc: &'static str, pub desc: &'static str,
pub default: DefaultValue, pub default: DefaultValue,
pub dispval: fn(&mut fmt::Write, &Value) -> fmt::Result,
} }
$($( $($(
#[allow(non_upper_case_globals)] #[allow(non_upper_case_globals)]
pub static $name: TagInfo = TagInfo { pub static $name: TagInfo = TagInfo {
name: stringify!($name), desc: $desc, default: $defval }; name: stringify!($name),
desc: $desc,
default: $defval,
dispval: super::$dispval,
};
)+)+ )+)+
} }
@ -172,323 +180,400 @@ generate_well_known_tag_constants!(
/// A pointer to the Exif IFD. This is used for the internal structure /// A pointer to the Exif IFD. This is used for the internal structure
/// of Exif data and will not be returned to the user. /// of Exif data and will not be returned to the user.
(ExifIFDPointer, 0x8769, DefaultValue::None, (ExifIFDPointer, 0x8769, DefaultValue::None, d_tbd,
"Exif IFD pointer"), "Exif IFD pointer"),
/// A pointer to the GPS IFD. This is used for the internal structure /// A pointer to the GPS IFD. This is used for the internal structure
/// of Exif data and will not be returned to the user. /// of Exif data and will not be returned to the user.
(GPSInfoIFDPointer, 0x8825, DefaultValue::None, (GPSInfoIFDPointer, 0x8825, DefaultValue::None, d_tbd,
"GPS Info IFD pointer"), "GPS Info IFD pointer"),
|Context::Exif| |Context::Exif|
/// A pointer to the interoperability IFD. This is used for the internal /// A pointer to the interoperability IFD. This is used for the internal
/// structure of Exif data and will not be returned to the user. /// structure of Exif data and will not be returned to the user.
(InteropIFDPointer, 0xa005, DefaultValue::None, (InteropIFDPointer, 0xa005, DefaultValue::None, d_tbd,
"Interoperability IFD pointer"), "Interoperability IFD pointer"),
// TIFF primary and thumbnail attributes [EXIF23 4.6.4 Table 4, // TIFF primary and thumbnail attributes [EXIF23 4.6.4 Table 4,
// 4.6.8 Table 17, and 4.6.8 Table 21]. // 4.6.8 Table 17, and 4.6.8 Table 21].
|Context::Tiff| |Context::Tiff|
(ImageWidth, 0x100, DefaultValue::None, (ImageWidth, 0x100, DefaultValue::None, d_tbd,
"Image width"), "Image width"),
(ImageLength, 0x101, DefaultValue::None, (ImageLength, 0x101, DefaultValue::None, d_tbd,
"Image height"), "Image height"),
(BitsPerSample, 0x102, DefaultValue::Short(&[8, 8, 8]), (BitsPerSample, 0x102, DefaultValue::Short(&[8, 8, 8]), d_tbd,
"Number of bits per component"), "Number of bits per component"),
(Compression, 0x103, DefaultValue::None, (Compression, 0x103, DefaultValue::None, d_tbd,
"Compression scheme"), "Compression scheme"),
(PhotometricInterpretation, 0x106, DefaultValue::None, (PhotometricInterpretation, 0x106, DefaultValue::None, d_tbd,
"Pixel composition"), "Pixel composition"),
(ImageDescription, 0x10e, DefaultValue::None, (ImageDescription, 0x10e, DefaultValue::None, d_tbd,
"Image title"), "Image title"),
(Make, 0x10f, DefaultValue::None, (Make, 0x10f, DefaultValue::None, d_tbd,
"Manufacturer of image input equipment"), "Manufacturer of image input equipment"),
(Model, 0x110, DefaultValue::None, (Model, 0x110, DefaultValue::None, d_tbd,
"Model of image input equipment"), "Model of image input equipment"),
(StripOffsets, 0x111, DefaultValue::None, (StripOffsets, 0x111, DefaultValue::None, d_tbd,
"Image data location"), "Image data location"),
(Orientation, 0x112, DefaultValue::Short(&[1]), (Orientation, 0x112, DefaultValue::Short(&[1]), d_tbd,
"Orientation of image"), "Orientation of image"),
(SamplesPerPixel, 0x115, DefaultValue::Short(&[3]), (SamplesPerPixel, 0x115, DefaultValue::Short(&[3]), d_tbd,
"Number of components"), "Number of components"),
(RowsPerStrip, 0x116, DefaultValue::None, (RowsPerStrip, 0x116, DefaultValue::None, d_tbd,
"Number of rows per strip"), "Number of rows per strip"),
(StripByteCounts, 0x117, DefaultValue::None, (StripByteCounts, 0x117, DefaultValue::None, d_tbd,
"Bytes per compressed strip"), "Bytes per compressed strip"),
(XResolution, 0x11a, DefaultValue::Rational(&[(72, 1)]), (XResolution, 0x11a, DefaultValue::Rational(&[(72, 1)]), d_tbd,
"Image resolution in width direction"), "Image resolution in width direction"),
(YResolution, 0x11b, DefaultValue::Rational(&[(72, 1)]), (YResolution, 0x11b, DefaultValue::Rational(&[(72, 1)]), d_tbd,
"Image resolution in height direction"), "Image resolution in height direction"),
(PlanarConfiguration, 0x11c, DefaultValue::Short(&[1]), (PlanarConfiguration, 0x11c, DefaultValue::Short(&[1]), d_tbd,
"Image data arrangement"), "Image data arrangement"),
(ResolutionUnit, 0x128, DefaultValue::Short(&[2]), (ResolutionUnit, 0x128, DefaultValue::Short(&[2]), d_tbd,
"Unit of X and Y resolution"), "Unit of X and Y resolution"),
(TransferFunction, 0x12d, DefaultValue::None, (TransferFunction, 0x12d, DefaultValue::None, d_tbd,
"Transfer function"), "Transfer function"),
(Software, 0x131, DefaultValue::None, (Software, 0x131, DefaultValue::None, d_tbd,
"Software used"), "Software used"),
(DateTime, 0x132, DefaultValue::None, (DateTime, 0x132, DefaultValue::None, d_tbd,
"File change date and time"), "File change date and time"),
(Artist, 0x13b, DefaultValue::None, (Artist, 0x13b, DefaultValue::None, d_tbd,
"Person who created the image"), "Person who created the image"),
(WhitePoint, 0x13e, DefaultValue::None, (WhitePoint, 0x13e, DefaultValue::None, d_tbd,
"White point chromaticity"), "White point chromaticity"),
(PrimaryChromaticities, 0x13f, DefaultValue::None, (PrimaryChromaticities, 0x13f, DefaultValue::None, d_tbd,
"Chromaticities of primaries"), "Chromaticities of primaries"),
(JPEGInterchangeFormat, 0x201, DefaultValue::None, (JPEGInterchangeFormat, 0x201, DefaultValue::None, d_tbd,
"Offset to JPEG SOI"), "Offset to JPEG SOI"),
(JPEGInterchangeFormatLength, 0x202, DefaultValue::None, (JPEGInterchangeFormatLength, 0x202, DefaultValue::None, d_tbd,
"Bytes of JPEG data"), "Bytes of JPEG data"),
(YCbCrCoefficients, 0x211, DefaultValue::Unspecified, (YCbCrCoefficients, 0x211, DefaultValue::Unspecified, d_tbd,
"Color space transformation matrix coefficients"), "Color space transformation matrix coefficients"),
(YCbCrSubSampling, 0x212, DefaultValue::None, (YCbCrSubSampling, 0x212, DefaultValue::None, d_tbd,
"Subsampling ratio of Y to C"), "Subsampling ratio of Y to C"),
(YCbCrPositioning, 0x213, DefaultValue::Short(&[1]), (YCbCrPositioning, 0x213, DefaultValue::Short(&[1]), d_tbd,
"Y and C positioning"), "Y and C positioning"),
(ReferenceBlackWhite, 0x214, DefaultValue::ContextDependent, (ReferenceBlackWhite, 0x214, DefaultValue::ContextDependent, d_tbd,
"Pair of black and white reference values"), "Pair of black and white reference values"),
(Copyright, 0x8298, DefaultValue::None, (Copyright, 0x8298, DefaultValue::None, d_tbd,
"Copyright holder"), "Copyright holder"),
// Exif IFD attributes [EXIF23 4.6.5 Table 7 and 4.6.8 Table 18]. // Exif IFD attributes [EXIF23 4.6.5 Table 7 and 4.6.8 Table 18].
|Context::Exif| |Context::Exif|
(ExposureTime, 0x829a, DefaultValue::None, (ExposureTime, 0x829a, DefaultValue::None, d_tbd,
"Exposure time"), "Exposure time"),
(FNumber, 0x829d, DefaultValue::None, (FNumber, 0x829d, DefaultValue::None, d_tbd,
"F number"), "F number"),
(ExposureProgram, 0x8822, DefaultValue::None, (ExposureProgram, 0x8822, DefaultValue::None, d_tbd,
"Exposure program"), "Exposure program"),
(SpectralSensitivity, 0x8824, DefaultValue::None, (SpectralSensitivity, 0x8824, DefaultValue::None, d_tbd,
"Spectral sensitivity"), "Spectral sensitivity"),
(PhotographicSensitivity, 0x8827, DefaultValue::None, (PhotographicSensitivity, 0x8827, DefaultValue::None, d_tbd,
"Photographic sensitivity"), "Photographic sensitivity"),
(OECF, 0x8828, DefaultValue::None, (OECF, 0x8828, DefaultValue::None, d_tbd,
"Optoelectric conversion factor"), "Optoelectric conversion factor"),
(SensitivityType, 0x8830, DefaultValue::None, (SensitivityType, 0x8830, DefaultValue::None, d_tbd,
"Sensitivity type"), "Sensitivity type"),
(StandardOutputSensitivity, 0x8831, DefaultValue::None, (StandardOutputSensitivity, 0x8831, DefaultValue::None, d_tbd,
"Standard output sensitivity"), "Standard output sensitivity"),
(RecommendedExposureIndex, 0x8832, DefaultValue::None, (RecommendedExposureIndex, 0x8832, DefaultValue::None, d_tbd,
"Recommended exposure index"), "Recommended exposure index"),
(ISOSpeed, 0x8833, DefaultValue::None, (ISOSpeed, 0x8833, DefaultValue::None, d_tbd,
"ISO speed"), "ISO speed"),
(ISOSpeedLatitudeyyy, 0x8834, DefaultValue::None, (ISOSpeedLatitudeyyy, 0x8834, DefaultValue::None, d_tbd,
"ISO speed latitude yyy"), "ISO speed latitude yyy"),
(ISOSpeedLatitudezzz, 0x8835, DefaultValue::None, (ISOSpeedLatitudezzz, 0x8835, DefaultValue::None, d_tbd,
"ISO speed latitude zzz"), "ISO speed latitude zzz"),
// The absence of this field means non-conformance to Exif, so the default // The absence of this field means non-conformance to Exif, so the default
// value specified in the standard (e.g., "0231") should not apply. // value specified in the standard (e.g., "0231") should not apply.
(ExifVersion, 0x9000, DefaultValue::None, (ExifVersion, 0x9000, DefaultValue::None, d_tbd,
"Exif version"), "Exif version"),
(DateTimeOriginal, 0x9003, DefaultValue::None, (DateTimeOriginal, 0x9003, DefaultValue::None, d_tbd,
"Date and time of original data generation"), "Date and time of original data generation"),
(DateTimeDigitized, 0x9004, DefaultValue::None, (DateTimeDigitized, 0x9004, DefaultValue::None, d_tbd,
"Date and time of digital data generation"), "Date and time of digital data generation"),
(OffsetTime, 0x9010, DefaultValue::None, (OffsetTime, 0x9010, DefaultValue::None, d_tbd,
"Offset data of DateTime"), "Offset data of DateTime"),
(OffsetTimeOriginal, 0x9011, DefaultValue::None, (OffsetTimeOriginal, 0x9011, DefaultValue::None, d_tbd,
"Offset data of DateTimeOriginal"), "Offset data of DateTimeOriginal"),
(OffsetTimeDigitized, 0x9012, DefaultValue::None, (OffsetTimeDigitized, 0x9012, DefaultValue::None, d_tbd,
"Offset data of DateTimeDigitized"), "Offset data of DateTimeDigitized"),
(ComponentsConfiguration, 0x9101, DefaultValue::ContextDependent, (ComponentsConfiguration, 0x9101, DefaultValue::ContextDependent, d_tbd,
"Meaning of each component"), "Meaning of each component"),
(CompressedBitsPerPixel, 0x9102, DefaultValue::None, (CompressedBitsPerPixel, 0x9102, DefaultValue::None, d_tbd,
"Image compression mode"), "Image compression mode"),
(ShutterSpeedValue, 0x9201, DefaultValue::None, (ShutterSpeedValue, 0x9201, DefaultValue::None, d_tbd,
"Shutter speed"), "Shutter speed"),
(ApertureValue, 0x9202, DefaultValue::None, (ApertureValue, 0x9202, DefaultValue::None, d_tbd,
"Aperture"), "Aperture"),
(BrightnessValue, 0x9203, DefaultValue::None, (BrightnessValue, 0x9203, DefaultValue::None, d_tbd,
"Brightness"), "Brightness"),
(ExposureBiasValue, 0x9204, DefaultValue::None, (ExposureBiasValue, 0x9204, DefaultValue::None, d_tbd,
"Exposure bias"), "Exposure bias"),
(MaxApertureValue, 0x9205, DefaultValue::None, (MaxApertureValue, 0x9205, DefaultValue::None, d_tbd,
"Maximum lens aperture"), "Maximum lens aperture"),
(SubjectDistance, 0x9206, DefaultValue::None, (SubjectDistance, 0x9206, DefaultValue::None, d_tbd,
"Subject distance"), "Subject distance"),
(MeteringMode, 0x9207, DefaultValue::Short(&[0]), (MeteringMode, 0x9207, DefaultValue::Short(&[0]), d_tbd,
"Metering mode"), "Metering mode"),
(LightSource, 0x9208, DefaultValue::Short(&[0]), (LightSource, 0x9208, DefaultValue::Short(&[0]), d_tbd,
"Light source"), "Light source"),
(Flash, 0x9209, DefaultValue::Unspecified, (Flash, 0x9209, DefaultValue::Unspecified, d_tbd,
"Flash"), "Flash"),
(FocalLength, 0x920a, DefaultValue::None, (FocalLength, 0x920a, DefaultValue::None, d_tbd,
"Lens focal length"), "Lens focal length"),
(SubjectArea, 0x9214, DefaultValue::None, (SubjectArea, 0x9214, DefaultValue::None, d_tbd,
"Subject area"), "Subject area"),
(MakerNote, 0x927c, DefaultValue::None, (MakerNote, 0x927c, DefaultValue::None, d_tbd,
"Manufacturer notes"), "Manufacturer notes"),
(UserComment, 0x9286, DefaultValue::None, (UserComment, 0x9286, DefaultValue::None, d_tbd,
"User comments"), "User comments"),
(SubSecTime, 0x9290, DefaultValue::None, (SubSecTime, 0x9290, DefaultValue::None, d_tbd,
"DateTime subseconds"), "DateTime subseconds"),
(SubSecTimeOriginal, 0x9291, DefaultValue::None, (SubSecTimeOriginal, 0x9291, DefaultValue::None, d_tbd,
"DateTimeOriginal subseconds"), "DateTimeOriginal subseconds"),
(SubSecTimeDigitized, 0x9292, DefaultValue::None, (SubSecTimeDigitized, 0x9292, DefaultValue::None, d_tbd,
"DateTimeDigitized subseconds"), "DateTimeDigitized subseconds"),
(Temperature, 0x9400, DefaultValue::None, (Temperature, 0x9400, DefaultValue::None, d_tbd,
"Temperature"), "Temperature"),
(Humidity, 0x9401, DefaultValue::None, (Humidity, 0x9401, DefaultValue::None, d_tbd,
"Humidity"), "Humidity"),
(Pressure, 0x9402, DefaultValue::None, (Pressure, 0x9402, DefaultValue::None, d_tbd,
"Pressure"), "Pressure"),
(WaterDepth, 0x9403, DefaultValue::None, (WaterDepth, 0x9403, DefaultValue::None, d_tbd,
"Water depth"), "Water depth"),
(Acceleration, 0x9404, DefaultValue::None, (Acceleration, 0x9404, DefaultValue::None, d_tbd,
"Acceleration"), "Acceleration"),
(CameraElevationAngle, 0x9405, DefaultValue::None, (CameraElevationAngle, 0x9405, DefaultValue::None, d_tbd,
"Camera elevation angle"), "Camera elevation angle"),
(FlashpixVersion, 0xa000, DefaultValue::Undefined(b"0100"), (FlashpixVersion, 0xa000, DefaultValue::Undefined(b"0100"), d_tbd,
"Supported Flashpix version"), "Supported Flashpix version"),
(ColorSpace, 0xa001, DefaultValue::Unspecified, (ColorSpace, 0xa001, DefaultValue::Unspecified, d_tbd,
"Color space information"), "Color space information"),
(PixelXDimension, 0xa002, DefaultValue::None, (PixelXDimension, 0xa002, DefaultValue::None, d_tbd,
"Valid image width"), "Valid image width"),
(PixelYDimension, 0xa003, DefaultValue::Unspecified, (PixelYDimension, 0xa003, DefaultValue::Unspecified, d_tbd,
"Valid image height"), "Valid image height"),
(RelatedSoundFile, 0xa004, DefaultValue::None, (RelatedSoundFile, 0xa004, DefaultValue::None, d_tbd,
"Related audio file"), "Related audio file"),
(FlashEnergy, 0xa20b, DefaultValue::None, (FlashEnergy, 0xa20b, DefaultValue::None, d_tbd,
"Flash energy"), "Flash energy"),
(SpatialFrequencyResponse, 0xa20c, DefaultValue::None, (SpatialFrequencyResponse, 0xa20c, DefaultValue::None, d_tbd,
"Spatial frequency response"), "Spatial frequency response"),
(FocalPlaneXResolution, 0xa20e, DefaultValue::None, (FocalPlaneXResolution, 0xa20e, DefaultValue::None, d_tbd,
"Focal plane X resolution"), "Focal plane X resolution"),
(FocalPlaneYResolution, 0xa20f, DefaultValue::None, (FocalPlaneYResolution, 0xa20f, DefaultValue::None, d_tbd,
"Focal plane Y resolution"), "Focal plane Y resolution"),
(FocalPlaneResolutionUnit, 0xa210, DefaultValue::Short(&[2]), (FocalPlaneResolutionUnit, 0xa210, DefaultValue::Short(&[2]), d_tbd,
"Focal plane resolution unit"), "Focal plane resolution unit"),
(SubjectLocation, 0xa214, DefaultValue::None, (SubjectLocation, 0xa214, DefaultValue::None, d_tbd,
"Subject location"), "Subject location"),
(ExposureIndex, 0xa215, DefaultValue::None, (ExposureIndex, 0xa215, DefaultValue::None, d_tbd,
"Exposure index"), "Exposure index"),
(SensingMethod, 0xa217, DefaultValue::None, (SensingMethod, 0xa217, DefaultValue::None, d_tbd,
"Sensing method"), "Sensing method"),
(FileSource, 0xa300, DefaultValue::Undefined(&[3]), (FileSource, 0xa300, DefaultValue::Undefined(&[3]), d_tbd,
"File source"), "File source"),
(SceneType, 0xa301, DefaultValue::Undefined(&[1]), (SceneType, 0xa301, DefaultValue::Undefined(&[1]), d_tbd,
"Scene type"), "Scene type"),
(CFAPattern, 0xa302, DefaultValue::None, (CFAPattern, 0xa302, DefaultValue::None, d_tbd,
"CFA pattern"), "CFA pattern"),
(CustomRendered, 0xa401, DefaultValue::Short(&[0]), (CustomRendered, 0xa401, DefaultValue::Short(&[0]), d_tbd,
"Custom image processing"), "Custom image processing"),
(ExposureMode, 0xa402, DefaultValue::None, (ExposureMode, 0xa402, DefaultValue::None, d_tbd,
"Exposure mode"), "Exposure mode"),
(WhiteBalance, 0xa403, DefaultValue::None, (WhiteBalance, 0xa403, DefaultValue::None, d_tbd,
"White balance"), "White balance"),
(DigitalZoomRatio, 0xa404, DefaultValue::None, (DigitalZoomRatio, 0xa404, DefaultValue::None, d_tbd,
"Digital zoom ratio"), "Digital zoom ratio"),
(FocalLengthIn35mmFilm, 0xa405, DefaultValue::None, (FocalLengthIn35mmFilm, 0xa405, DefaultValue::None, d_tbd,
"Focal length in 35 mm film"), "Focal length in 35 mm film"),
(SceneCaptureType, 0xa406, DefaultValue::Short(&[0]), (SceneCaptureType, 0xa406, DefaultValue::Short(&[0]), d_tbd,
"Scene capture type"), "Scene capture type"),
(GainControl, 0xa407, DefaultValue::None, (GainControl, 0xa407, DefaultValue::None, d_tbd,
"Gain control"), "Gain control"),
(Contrast, 0xa408, DefaultValue::Short(&[0]), (Contrast, 0xa408, DefaultValue::Short(&[0]), d_tbd,
"Contrast"), "Contrast"),
(Saturation, 0xa409, DefaultValue::Short(&[0]), (Saturation, 0xa409, DefaultValue::Short(&[0]), d_tbd,
"Saturation"), "Saturation"),
(Sharpness, 0xa40a, DefaultValue::Short(&[0]), (Sharpness, 0xa40a, DefaultValue::Short(&[0]), d_tbd,
"Sharpness"), "Sharpness"),
(DeviceSettingDescription, 0xa40b, DefaultValue::None, (DeviceSettingDescription, 0xa40b, DefaultValue::None, d_tbd,
"Device settings description"), "Device settings description"),
(SubjectDistanceRange, 0xa40c, DefaultValue::None, (SubjectDistanceRange, 0xa40c, DefaultValue::None, d_tbd,
"Subject distance range"), "Subject distance range"),
(ImageUniqueID, 0xa420, DefaultValue::None, (ImageUniqueID, 0xa420, DefaultValue::None, d_tbd,
"Unique image ID"), "Unique image ID"),
(CameraOwnerName, 0xa430, DefaultValue::None, (CameraOwnerName, 0xa430, DefaultValue::None, d_tbd,
"Camera owner name"), "Camera owner name"),
(BodySerialNumber, 0xa431, DefaultValue::None, (BodySerialNumber, 0xa431, DefaultValue::None, d_tbd,
"Body serial number"), "Body serial number"),
(LensSpecification, 0xa432, DefaultValue::None, (LensSpecification, 0xa432, DefaultValue::None, d_tbd,
"Lens specification"), "Lens specification"),
(LensMake, 0xa433, DefaultValue::None, (LensMake, 0xa433, DefaultValue::None, d_tbd,
"Lens make"), "Lens make"),
(LensModel, 0xa434, DefaultValue::None, (LensModel, 0xa434, DefaultValue::None, d_tbd,
"Lens model"), "Lens model"),
(LensSerialNumber, 0xa435, DefaultValue::None, (LensSerialNumber, 0xa435, DefaultValue::None, d_tbd,
"Lens serial number"), "Lens serial number"),
(Gamma, 0xa500, DefaultValue::None, (Gamma, 0xa500, DefaultValue::None, d_tbd,
"Gamma"), "Gamma"),
// GPS attributes [EXIF23 4.6.6 Table 15 and 4.6.8 Table 19]. // GPS attributes [EXIF23 4.6.6 Table 15 and 4.6.8 Table 19].
|Context::Gps| |Context::Gps|
// Depends on the Exif version. // Depends on the Exif version.
(GPSVersionID, 0x0, DefaultValue::ContextDependent, (GPSVersionID, 0x0, DefaultValue::ContextDependent, d_tbd,
"GPS tag version"), "GPS tag version"),
(GPSLatitudeRef, 0x1, DefaultValue::None, (GPSLatitudeRef, 0x1, DefaultValue::None, d_tbd,
"North or south latitude"), "North or south latitude"),
(GPSLatitude, 0x2, DefaultValue::None, (GPSLatitude, 0x2, DefaultValue::None, d_tbd,
"Latitude"), "Latitude"),
(GPSLongitudeRef, 0x3, DefaultValue::None, (GPSLongitudeRef, 0x3, DefaultValue::None, d_tbd,
"East or West Longitude"), "East or West Longitude"),
(GPSLongitude, 0x4, DefaultValue::None, (GPSLongitude, 0x4, DefaultValue::None, d_tbd,
"Longitude"), "Longitude"),
(GPSAltitudeRef, 0x5, DefaultValue::Byte(&[0]), (GPSAltitudeRef, 0x5, DefaultValue::Byte(&[0]), d_tbd,
"Altitude reference"), "Altitude reference"),
(GPSAltitude, 0x6, DefaultValue::None, (GPSAltitude, 0x6, DefaultValue::None, d_tbd,
"Altitude"), "Altitude"),
(GPSTimeStamp, 0x7, DefaultValue::None, (GPSTimeStamp, 0x7, DefaultValue::None, d_tbd,
"GPS time (atomic clock)"), "GPS time (atomic clock)"),
(GPSSatellites, 0x8, DefaultValue::None, (GPSSatellites, 0x8, DefaultValue::None, d_tbd,
"GPS satellites used for measurement"), "GPS satellites used for measurement"),
(GPSStatus, 0x9, DefaultValue::None, (GPSStatus, 0x9, DefaultValue::None, d_tbd,
"GPS receiver status"), "GPS receiver status"),
(GPSMeasureMode, 0xa, DefaultValue::None, (GPSMeasureMode, 0xa, DefaultValue::None, d_tbd,
"GPS measurement mode"), "GPS measurement mode"),
(GPSDOP, 0xb, DefaultValue::None, (GPSDOP, 0xb, DefaultValue::None, d_tbd,
"Measurement precision"), "Measurement precision"),
(GPSSpeedRef, 0xc, DefaultValue::Ascii(&[b"K"]), (GPSSpeedRef, 0xc, DefaultValue::Ascii(&[b"K"]), d_tbd,
"Speed unit"), "Speed unit"),
(GPSSpeed, 0xd, DefaultValue::None, (GPSSpeed, 0xd, DefaultValue::None, d_tbd,
"Speed of GPS receiver"), "Speed of GPS receiver"),
(GPSTrackRef, 0xe, DefaultValue::Ascii(&[b"T"]), (GPSTrackRef, 0xe, DefaultValue::Ascii(&[b"T"]), d_tbd,
"Reference for direction of movement"), "Reference for direction of movement"),
(GPSTrack, 0xf, DefaultValue::None, (GPSTrack, 0xf, DefaultValue::None, d_tbd,
"Direction of movement"), "Direction of movement"),
(GPSImgDirectionRef, 0x10, DefaultValue::Ascii(&[b"T"]), (GPSImgDirectionRef, 0x10, DefaultValue::Ascii(&[b"T"]), d_tbd,
"Reference for direction of image"), "Reference for direction of image"),
(GPSImgDirection, 0x11, DefaultValue::None, (GPSImgDirection, 0x11, DefaultValue::None, d_tbd,
"Direction of image"), "Direction of image"),
(GPSMapDatum, 0x12, DefaultValue::None, (GPSMapDatum, 0x12, DefaultValue::None, d_tbd,
"Geodetic survey data used"), "Geodetic survey data used"),
(GPSDestLatitudeRef, 0x13, DefaultValue::None, (GPSDestLatitudeRef, 0x13, DefaultValue::None, d_tbd,
"Reference for latitude of destination"), "Reference for latitude of destination"),
(GPSDestLatitude, 0x14, DefaultValue::None, (GPSDestLatitude, 0x14, DefaultValue::None, d_tbd,
"Latitude of destination"), "Latitude of destination"),
(GPSDestLongitudeRef, 0x15, DefaultValue::None, (GPSDestLongitudeRef, 0x15, DefaultValue::None, d_tbd,
"Reference for longitude of destination"), "Reference for longitude of destination"),
(GPSDestLongitude, 0x16, DefaultValue::None, (GPSDestLongitude, 0x16, DefaultValue::None, d_tbd,
"Longitude of destination"), "Longitude of destination"),
(GPSDestBearingRef, 0x17, DefaultValue::Ascii(&[b"T"]), (GPSDestBearingRef, 0x17, DefaultValue::Ascii(&[b"T"]), d_tbd,
"Reference for bearing of destination"), "Reference for bearing of destination"),
(GPSDestBearing, 0x18, DefaultValue::None, (GPSDestBearing, 0x18, DefaultValue::None, d_tbd,
"Bearing of destination"), "Bearing of destination"),
(GPSDestDistanceRef, 0x19, DefaultValue::Ascii(&[b"K"]), (GPSDestDistanceRef, 0x19, DefaultValue::Ascii(&[b"K"]), d_tbd,
"Reference for distance to destination"), "Reference for distance to destination"),
(GPSDestDistance, 0x1a, DefaultValue::None, (GPSDestDistance, 0x1a, DefaultValue::None, d_tbd,
"Distance to destination"), "Distance to destination"),
(GPSProcessingMethod, 0x1b, DefaultValue::None, (GPSProcessingMethod, 0x1b, DefaultValue::None, d_tbd,
"Name of GPS processing method"), "Name of GPS processing method"),
(GPSAreaInformation, 0x1c, DefaultValue::None, (GPSAreaInformation, 0x1c, DefaultValue::None, d_tbd,
"Name of GPS area"), "Name of GPS area"),
(GPSDateStamp, 0x1d, DefaultValue::None, (GPSDateStamp, 0x1d, DefaultValue::None, d_tbd,
"GPS date"), "GPS date"),
(GPSDifferential, 0x1e, DefaultValue::None, (GPSDifferential, 0x1e, DefaultValue::None, d_tbd,
"GPS differential correction"), "GPS differential correction"),
(GPSHPositioningError, 0x1f, DefaultValue::None, (GPSHPositioningError, 0x1f, DefaultValue::None, d_tbd,
"Horizontal positioning error"), "Horizontal positioning error"),
// Interoperability attributes [EXIF23 4.6.7 Table 16 and 4.6.8 Table 20]. // Interoperability attributes [EXIF23 4.6.7 Table 16 and 4.6.8 Table 20].
|Context::Interop| |Context::Interop|
(InteroperabilityIndex, 0x1, DefaultValue::None, (InteroperabilityIndex, 0x1, DefaultValue::None, d_tbd,
"Interoperability identification"), "Interoperability identification"),
); );
// For Value::display_as().
pub fn display_value_as<'a>(value: &'a Value, tag: Tag) -> value::Display<'a> {
match get_tag_info(tag) {
Some(ti) => value::Display { fmt: ti.dispval, value: value },
None => value::Display { fmt: d_default, value: value },
}
}
fn d_tbd(_w: &mut fmt::Write, _value: &Value) -> fmt::Result {
unimplemented!();
}
fn d_default(w: &mut fmt::Write, value: &Value) -> fmt::Result {
match *value {
Value::Byte(ref v) => d_sub_comma(w, v),
Value::Ascii(ref v) => {
let mut first = true;
for x in v {
if !first {
try!(w.write_char('\n'));
}
first = false;
try!(d_escape_ascii(w, x));
}
Ok(())
},
Value::Short(ref v) => d_sub_comma(w, v),
Value::Long(ref v) => d_sub_comma(w, v),
Value::Rational(ref v) => d_sub_comma(w, v),
Value::SByte(ref v) => d_sub_comma(w, v),
Value::Undefined(ref s) => d_sub_hex(w, s),
Value::SShort(ref v) => d_sub_comma(w, v),
Value::SLong(ref v) => d_sub_comma(w, v),
Value::SRational(ref v) => d_sub_comma(w, v),
Value::Float(ref v) => d_sub_comma(w, v),
Value::Double(ref v) => d_sub_comma(w, v),
Value::Unknown(t, c, o) =>
write!(w, "unknown value (type={}, count={}, offset={:#x})",
t, c, o),
}
}
fn d_sub_comma<T>(w: &mut fmt::Write, slice: &[T])
-> fmt::Result where T: fmt::Display {
let mut first = true;
for x in slice {
try!(match first {
true => write!(w, "{}", x),
false => write!(w, ", {}", x),
});
first = false;
}
Ok(())
}
fn d_sub_hex(w: &mut fmt::Write, bytes: &[u8]) -> fmt::Result {
try!(w.write_str("0x"));
for x in bytes {
try!(write!(w, "{:02x}", x));
}
Ok(())
}
fn d_escape_ascii(w: &mut fmt::Write, bytes: &[u8]) -> fmt::Result {
for &c in bytes {
match c {
b'\\' => {
try!(w.write_char('\\'));
try!(w.write_char(c as char));
},
0x20...0x7e => try!(w.write_char(c as char)),
_ => try!(write!(w, "\\x{:02x}", c)),
}
}
Ok(())
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use tag; use tag;

23
src/value.rs
View File

@ -68,6 +68,29 @@ pub enum Value<'a> {
Unknown(u16, u32, u32), Unknown(u16, u32, u32),
} }
impl<'a> Value<'a> {
/// Returns an object that implements `std::fmt::Display` for
/// printing a value in a tag-specific format.
/// The tag of the value is specified as the argument.
#[inline]
pub fn display_as(&self, tag: ::tag_priv::Tag) -> Display {
::tag_priv::display_value_as(self, tag)
}
}
/// Helper struct for printing a value in a tag-specific format.
pub struct Display<'a> {
pub fmt: fn(&mut fmt::Write, &Value) -> fmt::Result,
pub value: &'a Value<'a>,
}
impl<'a> fmt::Display for Display<'a> {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
(self.fmt)(f, self.value)
}
}
// Static default values. // Static default values.
pub enum DefaultValue { pub enum DefaultValue {
None, None,