Add Tag.default_value().
This commit is contained in:
KAMADA Ken'ichi
parent
6a5355750e
commit
7f66863d84
480
src/tag.rs
480
src/tag.rs
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@ -26,6 +26,8 @@
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use std::fmt;
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use value::Value;
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/// A tag of a TIFF field.
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//
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// This is not an enum to keep safety and API stability, while
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@ -64,6 +66,13 @@ impl Tag {
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pub fn description(&self) -> Option<&str> {
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get_tag_info(self).map(|ti| ti.desc)
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}
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/// Returns the default value of the tag. `None` is returned if
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/// it is not defined in the standard or it depends on the context.
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#[inline]
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pub fn default_value(&self) -> Option<Value> {
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get_tag_info(self).and_then(|ti| (&ti.default).into())
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}
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}
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impl fmt::Display for Tag {
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@ -93,7 +102,7 @@ macro_rules! generate_well_known_tag_constants {
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$( |$ctx:path| $(
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// Copy the doc attribute to the actual definition.
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$( #[$attr:meta] )*
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($name:ident, $num:expr, $desc:expr)
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($name:ident, $num:expr, $defval:expr, $desc:expr)
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),+, )+
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) => (
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/// A module that contains Exif tag constants.
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@ -122,15 +131,18 @@ macro_rules! generate_well_known_tag_constants {
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// Use a separate module to avoid name conflicts between
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// const Tag and static TagInfo.
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mod tag_info {
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use value::DefaultValue;
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pub struct TagInfo {
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pub name: &'static str,
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pub desc: &'static str,
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pub default: DefaultValue,
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}
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$($(
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#[allow(non_upper_case_globals)]
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pub static $name: TagInfo = TagInfo {
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name: stringify!($name), desc: $desc };
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name: stringify!($name), desc: $desc, default: $defval };
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)+)+
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}
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@ -153,174 +165,321 @@ generate_well_known_tag_constants!(
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/// A pointer to the Exif IFD. This is used for the internal structure
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/// of Exif data and will not be returned to the user.
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(ExifIFDPointer, 0x8769, "Exif IFD pointer"),
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(ExifIFDPointer, 0x8769, DefaultValue::None,
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"Exif IFD pointer"),
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/// A pointer to the GPS IFD. This is used for the internal structure
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/// of Exif data and will not be returned to the user.
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(GPSInfoIFDPointer, 0x8825, "GPS Info IFD pointer"),
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(GPSInfoIFDPointer, 0x8825, DefaultValue::None,
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"GPS Info IFD pointer"),
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|Context::Exif|
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/// A pointer to the interoperability IFD. This is used for the internal
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/// structure of Exif data and will not be returned to the user.
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(InteropIFDPointer, 0xa005, "Interoperability IFD pointer"),
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(InteropIFDPointer, 0xa005, DefaultValue::None,
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"Interoperability IFD pointer"),
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// TIFF primary and thumbnail attributes [EXIF23 4.6.4 Table 4,
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// 4.6.8 Table 17, and 4.6.8 Table 21].
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|Context::Tiff|
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(ImageWidth, 0x100, "Image width"),
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(ImageLength, 0x101, "Image height"),
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(BitsPerSample, 0x102, "Number of bits per component"),
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(Compression, 0x103, "Compression scheme"),
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(PhotometricInterpretation, 0x106, "Pixel composition"),
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(ImageDescription, 0x10e, "Image title"),
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(Make, 0x10f, "Manufacturer of image input equipment"),
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(Model, 0x110, "Model of image input equipment"),
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(StripOffsets, 0x111, "Image data location"),
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(Orientation, 0x112, "Orientation of image"),
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(SamplesPerPixel, 0x115, "Number of components"),
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(RowsPerStrip, 0x116, "Number of rows per strip"),
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(StripByteCounts, 0x117, "Bytes per compressed strip"),
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(XResolution, 0x11a, "Image resolution in width direction"),
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(YResolution, 0x11b, "Image resolution in height direction"),
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(PlanarConfiguration, 0x11c, "Image data arrangement"),
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(ResolutionUnit, 0x128, "Unit of X and Y resolution"),
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(TransferFunction, 0x12d, "Transfer function"),
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(Software, 0x131, "Software used"),
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(DateTime, 0x132, "File change date and time"),
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(Artist, 0x13b, "Person who created the image"),
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(WhitePoint, 0x13e, "White point chromaticity"),
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(PrimaryChromaticities, 0x13f, "Chromaticities of primaries"),
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(JPEGInterchangeFormat, 0x201, "Offset to JPEG SOI"),
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(JPEGInterchangeFormatLength, 0x202, "Bytes of JPEG data"),
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(YCbCrCoefficients, 0x211, "Color space transformation matrix coefficients"),
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(YCbCrSubSampling, 0x212, "Subsampling ratio of Y to C"),
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(YCbCrPositioning, 0x213, "Y and C positioning"),
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(ReferenceBlackWhite, 0x214, "Pair of black and white reference values"),
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(Copyright, 0x8298, "Copyright holder"),
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(ImageWidth, 0x100, DefaultValue::None,
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"Image width"),
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(ImageLength, 0x101, DefaultValue::None,
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"Image height"),
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(BitsPerSample, 0x102, DefaultValue::Short(&[8, 8, 8]),
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"Number of bits per component"),
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(Compression, 0x103, DefaultValue::None,
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"Compression scheme"),
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(PhotometricInterpretation, 0x106, DefaultValue::None,
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"Pixel composition"),
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(ImageDescription, 0x10e, DefaultValue::None,
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"Image title"),
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(Make, 0x10f, DefaultValue::None,
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"Manufacturer of image input equipment"),
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(Model, 0x110, DefaultValue::None,
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"Model of image input equipment"),
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(StripOffsets, 0x111, DefaultValue::None,
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"Image data location"),
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(Orientation, 0x112, DefaultValue::Short(&[1]),
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"Orientation of image"),
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(SamplesPerPixel, 0x115, DefaultValue::Short(&[3]),
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"Number of components"),
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(RowsPerStrip, 0x116, DefaultValue::None,
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"Number of rows per strip"),
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(StripByteCounts, 0x117, DefaultValue::None,
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"Bytes per compressed strip"),
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(XResolution, 0x11a, DefaultValue::Rational(&[(72, 1)]),
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"Image resolution in width direction"),
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(YResolution, 0x11b, DefaultValue::Rational(&[(72, 1)]),
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"Image resolution in height direction"),
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(PlanarConfiguration, 0x11c, DefaultValue::Short(&[1]),
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"Image data arrangement"),
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(ResolutionUnit, 0x128, DefaultValue::Short(&[2]),
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"Unit of X and Y resolution"),
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(TransferFunction, 0x12d, DefaultValue::None,
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"Transfer function"),
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(Software, 0x131, DefaultValue::None,
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"Software used"),
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(DateTime, 0x132, DefaultValue::None,
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"File change date and time"),
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(Artist, 0x13b, DefaultValue::None,
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"Person who created the image"),
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(WhitePoint, 0x13e, DefaultValue::None,
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"White point chromaticity"),
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(PrimaryChromaticities, 0x13f, DefaultValue::None,
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"Chromaticities of primaries"),
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(JPEGInterchangeFormat, 0x201, DefaultValue::None,
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"Offset to JPEG SOI"),
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(JPEGInterchangeFormatLength, 0x202, DefaultValue::None,
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"Bytes of JPEG data"),
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(YCbCrCoefficients, 0x211, DefaultValue::Unspecified,
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"Color space transformation matrix coefficients"),
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(YCbCrSubSampling, 0x212, DefaultValue::None,
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"Subsampling ratio of Y to C"),
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(YCbCrPositioning, 0x213, DefaultValue::Short(&[1]),
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"Y and C positioning"),
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(ReferenceBlackWhite, 0x214, DefaultValue::ContextDependent,
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"Pair of black and white reference values"),
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(Copyright, 0x8298, DefaultValue::None,
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"Copyright holder"),
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// Exif IFD attributes [EXIF23 4.6.5 Table 7 and 4.6.8 Table 18].
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|Context::Exif|
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(ExposureTime, 0x829a, "Exposure time"),
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(FNumber, 0x829d, "F number"),
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(ExposureProgram, 0x8822, "Exposure program"),
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(SpectralSensitivity, 0x8824, "Spectral sensitivity"),
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(PhotographicSensitivity, 0x8827, "Photographic sensitivity"),
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(OECF, 0x8828, "Optoelectric conversion factor"),
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(SensitivityType, 0x8830, "Sensitivity type"),
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(StandardOutputSensitivity, 0x8831, "Standard output sensitivity"),
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(RecommendedExposureIndex, 0x8832, "Recommended exposure index"),
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(ISOSpeed, 0x8833, "ISO speed"),
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(ISOSpeedLatitudeyyy, 0x8834, "ISO speed latitude yyy"),
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(ISOSpeedLatitudezzz, 0x8835, "ISO speed latitude zzz"),
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(ExifVersion, 0x9000, "Exif version"),
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(DateTimeOriginal, 0x9003, "Date and time of original data generation"),
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(DateTimeDigitized, 0x9004, "Date and time of digital data generation"),
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(OffsetTime, 0x9010, "Offset data of DateTime"),
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(OffsetTimeOriginal, 0x9011, "Offset data of DateTimeOriginal"),
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(OffsetTimeDigitized, 0x9012, "Offset data of DateTimeDigitized"),
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(ComponentsConfiguration, 0x9101, "Meaning of each component"),
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(CompressedBitsPerPixel, 0x9102, "Image compression mode"),
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(ShutterSpeedValue, 0x9201, "Shutter speed"),
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(ApertureValue, 0x9202, "Aperture"),
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(BrightnessValue, 0x9203, "Brightness"),
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(ExposureBiasValue, 0x9204, "Exposure bias"),
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(MaxApertureValue, 0x9205, "Maximum lens aperture"),
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(SubjectDistance, 0x9206, "Subject distance"),
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(MeteringMode, 0x9207, "Metering mode"),
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(LightSource, 0x9208, "Light source"),
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(Flash, 0x9209, "Flash"),
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(FocalLength, 0x920a, "Lens focal length"),
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(SubjectArea, 0x9214, "Subject area"),
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(MakerNote, 0x927c, "Manufacturer notes"),
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(UserComment, 0x9286, "User comments"),
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(SubSecTime, 0x9290, "DateTime subseconds"),
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(SubSecTimeOriginal, 0x9291, "DateTimeOriginal subseconds"),
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(SubSecTimeDigitized, 0x9292, "DateTimeDigitized subseconds"),
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(Temperature, 0x9400, "Temperature"),
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(Humidity, 0x9401, "Humidity"),
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(Pressure, 0x9402, "Pressure"),
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(WaterDepth, 0x9403, "Water depth"),
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(Acceleration, 0x9404, "Acceleration"),
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(CameraElevationAngle, 0x9405, "Camera elevation angle"),
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(FlashpixVersion, 0xa000, "Supported Flashpix version"),
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(ColorSpace, 0xa001, "Color space information"),
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(PixelXDimension, 0xa002, "Valid image width"),
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(PixelYDimension, 0xa003, "Valid image height"),
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(RelatedSoundFile, 0xa004, "Related audio file"),
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(FlashEnergy, 0xa20b, "Flash energy"),
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(SpatialFrequencyResponse, 0xa20c, "Spatial frequency response"),
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(FocalPlaneXResolution, 0xa20e, "Focal plane X resolution"),
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(FocalPlaneYResolution, 0xa20f, "Focal plane Y resolution"),
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(FocalPlaneResolutionUnit, 0xa210, "Focal plane resolution unit"),
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(SubjectLocation, 0xa214, "Subject location"),
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(ExposureIndex, 0xa215, "Exposure index"),
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(SensingMethod, 0xa217, "Sensing method"),
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(FileSource, 0xa300, "File source"),
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(SceneType, 0xa301, "Scene type"),
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(CFAPattern, 0xa302, "CFA pattern"),
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(CustomRendered, 0xa401, "Custom image processing"),
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(ExposureMode, 0xa402, "Exposure mode"),
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(WhiteBalance, 0xa403, "White balance"),
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(DigitalZoomRatio, 0xa404, "Digital zoom ratio"),
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(FocalLengthIn35mmFilm, 0xa405, "Focal length in 35 mm film"),
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(SceneCaptureType, 0xa406, "Scene capture type"),
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(GainControl, 0xa407, "Gain control"),
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(Contrast, 0xa408, "Contrast"),
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(Saturation, 0xa409, "Saturation"),
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(Sharpness, 0xa40a, "Sharpness"),
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(DeviceSettingDescription, 0xa40b, "Device settings description"),
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(SubjectDistanceRange, 0xa40c, "Subject distance range"),
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(ImageUniqueID, 0xa420, "Unique image ID"),
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(CameraOwnerName, 0xa430, "Camera owner name"),
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(BodySerialNumber, 0xa431, "Body serial number"),
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(LensSpecification, 0xa432, "Lens specification"),
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(LensMake, 0xa433, "Lens make"),
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(LensModel, 0xa434, "Lens model"),
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(LensSerialNumber, 0xa435, "Lens serial number"),
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(Gamma, 0xa500, "Gamma"),
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(ExposureTime, 0x829a, DefaultValue::None,
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"Exposure time"),
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(FNumber, 0x829d, DefaultValue::None,
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"F number"),
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(ExposureProgram, 0x8822, DefaultValue::None,
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"Exposure program"),
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(SpectralSensitivity, 0x8824, DefaultValue::None,
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"Spectral sensitivity"),
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(PhotographicSensitivity, 0x8827, DefaultValue::None,
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"Photographic sensitivity"),
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(OECF, 0x8828, DefaultValue::None,
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"Optoelectric conversion factor"),
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(SensitivityType, 0x8830, DefaultValue::None,
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"Sensitivity type"),
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(StandardOutputSensitivity, 0x8831, DefaultValue::None,
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"Standard output sensitivity"),
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(RecommendedExposureIndex, 0x8832, DefaultValue::None,
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"Recommended exposure index"),
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(ISOSpeed, 0x8833, DefaultValue::None,
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"ISO speed"),
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(ISOSpeedLatitudeyyy, 0x8834, DefaultValue::None,
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"ISO speed latitude yyy"),
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(ISOSpeedLatitudezzz, 0x8835, DefaultValue::None,
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"ISO speed latitude zzz"),
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// The absence of this field means non-conformance to Exif, so the default
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// value specified in the standard (e.g., "0231") should not apply.
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(ExifVersion, 0x9000, DefaultValue::None,
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"Exif version"),
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(DateTimeOriginal, 0x9003, DefaultValue::None,
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"Date and time of original data generation"),
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(DateTimeDigitized, 0x9004, DefaultValue::None,
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"Date and time of digital data generation"),
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(OffsetTime, 0x9010, DefaultValue::None,
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"Offset data of DateTime"),
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(OffsetTimeOriginal, 0x9011, DefaultValue::None,
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"Offset data of DateTimeOriginal"),
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(OffsetTimeDigitized, 0x9012, DefaultValue::None,
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"Offset data of DateTimeDigitized"),
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(ComponentsConfiguration, 0x9101, DefaultValue::ContextDependent,
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"Meaning of each component"),
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(CompressedBitsPerPixel, 0x9102, DefaultValue::None,
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"Image compression mode"),
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(ShutterSpeedValue, 0x9201, DefaultValue::None,
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"Shutter speed"),
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(ApertureValue, 0x9202, DefaultValue::None,
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"Aperture"),
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(BrightnessValue, 0x9203, DefaultValue::None,
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"Brightness"),
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(ExposureBiasValue, 0x9204, DefaultValue::None,
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"Exposure bias"),
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(MaxApertureValue, 0x9205, DefaultValue::None,
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"Maximum lens aperture"),
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(SubjectDistance, 0x9206, DefaultValue::None,
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"Subject distance"),
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(MeteringMode, 0x9207, DefaultValue::Short(&[0]),
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"Metering mode"),
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(LightSource, 0x9208, DefaultValue::Short(&[0]),
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"Light source"),
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(Flash, 0x9209, DefaultValue::Unspecified,
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"Flash"),
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(FocalLength, 0x920a, DefaultValue::None,
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"Lens focal length"),
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(SubjectArea, 0x9214, DefaultValue::None,
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"Subject area"),
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(MakerNote, 0x927c, DefaultValue::None,
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"Manufacturer notes"),
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(UserComment, 0x9286, DefaultValue::None,
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"User comments"),
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(SubSecTime, 0x9290, DefaultValue::None,
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"DateTime subseconds"),
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(SubSecTimeOriginal, 0x9291, DefaultValue::None,
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"DateTimeOriginal subseconds"),
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(SubSecTimeDigitized, 0x9292, DefaultValue::None,
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"DateTimeDigitized subseconds"),
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(Temperature, 0x9400, DefaultValue::None,
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"Temperature"),
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(Humidity, 0x9401, DefaultValue::None,
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"Humidity"),
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(Pressure, 0x9402, DefaultValue::None,
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"Pressure"),
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(WaterDepth, 0x9403, DefaultValue::None,
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"Water depth"),
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(Acceleration, 0x9404, DefaultValue::None,
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"Acceleration"),
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(CameraElevationAngle, 0x9405, DefaultValue::None,
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"Camera elevation angle"),
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(FlashpixVersion, 0xa000, DefaultValue::Undefined(b"0100"),
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"Supported Flashpix version"),
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(ColorSpace, 0xa001, DefaultValue::Unspecified,
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"Color space information"),
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(PixelXDimension, 0xa002, DefaultValue::None,
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"Valid image width"),
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(PixelYDimension, 0xa003, DefaultValue::Unspecified,
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"Valid image height"),
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(RelatedSoundFile, 0xa004, DefaultValue::None,
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"Related audio file"),
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(FlashEnergy, 0xa20b, DefaultValue::None,
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"Flash energy"),
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(SpatialFrequencyResponse, 0xa20c, DefaultValue::None,
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"Spatial frequency response"),
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(FocalPlaneXResolution, 0xa20e, DefaultValue::None,
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"Focal plane X resolution"),
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(FocalPlaneYResolution, 0xa20f, DefaultValue::None,
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"Focal plane Y resolution"),
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(FocalPlaneResolutionUnit, 0xa210, DefaultValue::Short(&[2]),
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"Focal plane resolution unit"),
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(SubjectLocation, 0xa214, DefaultValue::None,
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"Subject location"),
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(ExposureIndex, 0xa215, DefaultValue::None,
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"Exposure index"),
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(SensingMethod, 0xa217, DefaultValue::None,
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"Sensing method"),
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(FileSource, 0xa300, DefaultValue::Undefined(&[3]),
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"File source"),
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(SceneType, 0xa301, DefaultValue::Undefined(&[1]),
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"Scene type"),
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(CFAPattern, 0xa302, DefaultValue::None,
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"CFA pattern"),
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(CustomRendered, 0xa401, DefaultValue::Short(&[0]),
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"Custom image processing"),
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(ExposureMode, 0xa402, DefaultValue::None,
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"Exposure mode"),
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(WhiteBalance, 0xa403, DefaultValue::None,
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"White balance"),
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(DigitalZoomRatio, 0xa404, DefaultValue::None,
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"Digital zoom ratio"),
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(FocalLengthIn35mmFilm, 0xa405, DefaultValue::None,
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"Focal length in 35 mm film"),
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(SceneCaptureType, 0xa406, DefaultValue::Short(&[0]),
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"Scene capture type"),
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(GainControl, 0xa407, DefaultValue::None,
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"Gain control"),
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(Contrast, 0xa408, DefaultValue::Short(&[0]),
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"Contrast"),
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(Saturation, 0xa409, DefaultValue::Short(&[0]),
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"Saturation"),
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(Sharpness, 0xa40a, DefaultValue::Short(&[0]),
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"Sharpness"),
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(DeviceSettingDescription, 0xa40b, DefaultValue::None,
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"Device settings description"),
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(SubjectDistanceRange, 0xa40c, DefaultValue::None,
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"Subject distance range"),
|
||||
(ImageUniqueID, 0xa420, DefaultValue::None,
|
||||
"Unique image ID"),
|
||||
(CameraOwnerName, 0xa430, DefaultValue::None,
|
||||
"Camera owner name"),
|
||||
(BodySerialNumber, 0xa431, DefaultValue::None,
|
||||
"Body serial number"),
|
||||
(LensSpecification, 0xa432, DefaultValue::None,
|
||||
"Lens specification"),
|
||||
(LensMake, 0xa433, DefaultValue::None,
|
||||
"Lens make"),
|
||||
(LensModel, 0xa434, DefaultValue::None,
|
||||
"Lens model"),
|
||||
(LensSerialNumber, 0xa435, DefaultValue::None,
|
||||
"Lens serial number"),
|
||||
(Gamma, 0xa500, DefaultValue::None,
|
||||
"Gamma"),
|
||||
|
||||
// GPS attributes [EXIF23 4.6.6 Table 15 and 4.6.8 Table 19].
|
||||
|Context::Gps|
|
||||
|
||||
(GPSVersionID, 0x0, "GPS tag version"),
|
||||
(GPSLatitudeRef, 0x1, "North or south latitude"),
|
||||
(GPSLatitude, 0x2, "Latitude"),
|
||||
(GPSLongitudeRef, 0x3, "East or West Longitude"),
|
||||
(GPSLongitude, 0x4, "Longitude"),
|
||||
(GPSAltitudeRef, 0x5, "Altitude reference"),
|
||||
(GPSAltitude, 0x6, "Altitude"),
|
||||
(GPSTimeStamp, 0x7, "GPS time (atomic clock)"),
|
||||
(GPSSatellites, 0x8, "GPS satellites used for measurement"),
|
||||
(GPSStatus, 0x9, "GPS receiver status"),
|
||||
(GPSMeasureMode, 0xa, "GPS measurement mode"),
|
||||
(GPSDOP, 0xb, "Measurement precision"),
|
||||
(GPSSpeedRef, 0xc, "Speed unit"),
|
||||
(GPSSpeed, 0xd, "Speed of GPS receiver"),
|
||||
(GPSTrackRef, 0xe, "Reference for direction of movement"),
|
||||
(GPSTrack, 0xf, "Direction of movement"),
|
||||
(GPSImgDirectionRef, 0x10, "Reference for direction of image"),
|
||||
(GPSImgDirection, 0x11, "Direction of image"),
|
||||
(GPSMapDatum, 0x12, "Geodetic survey data used"),
|
||||
(GPSDestLatitudeRef, 0x13, "Reference for latitude of destination"),
|
||||
(GPSDestLatitude, 0x14, "Latitude of destination"),
|
||||
(GPSDestLongitudeRef, 0x15, "Reference for longitude of destination"),
|
||||
(GPSDestLongitude, 0x16, "Longitude of destination"),
|
||||
(GPSDestBearingRef, 0x17, "Reference for bearing of destination"),
|
||||
(GPSDestBearing, 0x18, "Bearing of destination"),
|
||||
(GPSDestDistanceRef, 0x19, "Reference for distance to destination"),
|
||||
(GPSDestDistance, 0x1a, "Distance to destination"),
|
||||
(GPSProcessingMethod, 0x1b, "Name of GPS processing method"),
|
||||
(GPSAreaInformation, 0x1c, "Name of GPS area"),
|
||||
(GPSDateStamp, 0x1d, "GPS date"),
|
||||
(GPSDifferential, 0x1e, "GPS differential correction"),
|
||||
(GPSHPositioningError, 0x1f, "Horizontal positioning error"),
|
||||
// Depends on the Exif version.
|
||||
(GPSVersionID, 0x0, DefaultValue::ContextDependent,
|
||||
"GPS tag version"),
|
||||
(GPSLatitudeRef, 0x1, DefaultValue::None,
|
||||
"North or south latitude"),
|
||||
(GPSLatitude, 0x2, DefaultValue::None,
|
||||
"Latitude"),
|
||||
(GPSLongitudeRef, 0x3, DefaultValue::None,
|
||||
"East or West Longitude"),
|
||||
(GPSLongitude, 0x4, DefaultValue::None,
|
||||
"Longitude"),
|
||||
(GPSAltitudeRef, 0x5, DefaultValue::Byte(&[0]),
|
||||
"Altitude reference"),
|
||||
(GPSAltitude, 0x6, DefaultValue::None,
|
||||
"Altitude"),
|
||||
(GPSTimeStamp, 0x7, DefaultValue::None,
|
||||
"GPS time (atomic clock)"),
|
||||
(GPSSatellites, 0x8, DefaultValue::None,
|
||||
"GPS satellites used for measurement"),
|
||||
(GPSStatus, 0x9, DefaultValue::None,
|
||||
"GPS receiver status"),
|
||||
(GPSMeasureMode, 0xa, DefaultValue::None,
|
||||
"GPS measurement mode"),
|
||||
(GPSDOP, 0xb, DefaultValue::None,
|
||||
"Measurement precision"),
|
||||
(GPSSpeedRef, 0xc, DefaultValue::Ascii(&[b"K"]),
|
||||
"Speed unit"),
|
||||
(GPSSpeed, 0xd, DefaultValue::None,
|
||||
"Speed of GPS receiver"),
|
||||
(GPSTrackRef, 0xe, DefaultValue::Ascii(&[b"T"]),
|
||||
"Reference for direction of movement"),
|
||||
(GPSTrack, 0xf, DefaultValue::None,
|
||||
"Direction of movement"),
|
||||
(GPSImgDirectionRef, 0x10, DefaultValue::Ascii(&[b"T"]),
|
||||
"Reference for direction of image"),
|
||||
(GPSImgDirection, 0x11, DefaultValue::None,
|
||||
"Direction of image"),
|
||||
(GPSMapDatum, 0x12, DefaultValue::None,
|
||||
"Geodetic survey data used"),
|
||||
(GPSDestLatitudeRef, 0x13, DefaultValue::None,
|
||||
"Reference for latitude of destination"),
|
||||
(GPSDestLatitude, 0x14, DefaultValue::None,
|
||||
"Latitude of destination"),
|
||||
(GPSDestLongitudeRef, 0x15, DefaultValue::None,
|
||||
"Reference for longitude of destination"),
|
||||
(GPSDestLongitude, 0x16, DefaultValue::None,
|
||||
"Longitude of destination"),
|
||||
(GPSDestBearingRef, 0x17, DefaultValue::Ascii(&[b"T"]),
|
||||
"Reference for bearing of destination"),
|
||||
(GPSDestBearing, 0x18, DefaultValue::None,
|
||||
"Bearing of destination"),
|
||||
(GPSDestDistanceRef, 0x19, DefaultValue::Ascii(&[b"K"]),
|
||||
"Reference for distance to destination"),
|
||||
(GPSDestDistance, 0x1a, DefaultValue::None,
|
||||
"Distance to destination"),
|
||||
(GPSProcessingMethod, 0x1b, DefaultValue::None,
|
||||
"Name of GPS processing method"),
|
||||
(GPSAreaInformation, 0x1c, DefaultValue::None,
|
||||
"Name of GPS area"),
|
||||
(GPSDateStamp, 0x1d, DefaultValue::None,
|
||||
"GPS date"),
|
||||
(GPSDifferential, 0x1e, DefaultValue::None,
|
||||
"GPS differential correction"),
|
||||
(GPSHPositioningError, 0x1f, DefaultValue::None,
|
||||
"Horizontal positioning error"),
|
||||
|
||||
// Interoperability attributes [EXIF23 4.6.7 Table 16 and 4.6.8 Table 20].
|
||||
|Context::Interop|
|
||||
|
||||
(InteroperabilityIndex, 0x1, "Interoperability identification"),
|
||||
(InteroperabilityIndex, 0x1, DefaultValue::None,
|
||||
"Interoperability identification"),
|
||||
);
|
||||
|
||||
#[cfg(test)]
|
||||
|
|
@ -342,4 +501,33 @@ mod tests {
|
|||
_ => panic!("failed to match Tag"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn default_value() {
|
||||
assert_pat!(tag::DateTime.default_value(), None);
|
||||
match tag::BitsPerSample.default_value() {
|
||||
Some(Value::Short(v)) => assert_eq!(v, &[8, 8, 8]),
|
||||
_ => panic!(),
|
||||
}
|
||||
match tag::XResolution.default_value() {
|
||||
Some(Value::Rational(v)) => {
|
||||
assert_eq!(v.len(), 1);
|
||||
assert_eq!(v[0].num, 72);
|
||||
assert_eq!(v[0].denom, 1);
|
||||
},
|
||||
_ => panic!(),
|
||||
}
|
||||
match tag::FileSource.default_value() {
|
||||
Some(Value::Undefined(v)) => assert_eq!(v, &[3]),
|
||||
_ => panic!(),
|
||||
}
|
||||
match tag::GPSAltitudeRef.default_value() {
|
||||
Some(Value::Byte(v)) => assert_eq!(v, &[0]),
|
||||
_ => panic!(),
|
||||
}
|
||||
match tag::GPSSpeedRef.default_value() {
|
||||
Some(Value::Ascii(v)) => assert_eq!(v, &[b"K"]),
|
||||
_ => panic!(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
34
src/value.rs
34
src/value.rs
|
|
@ -68,9 +68,43 @@ pub enum Value<'a> {
|
|||
Unknown(u16, u32, u32),
|
||||
}
|
||||
|
||||
// Static default values.
|
||||
pub enum DefaultValue {
|
||||
None,
|
||||
Byte(&'static [u8]),
|
||||
Ascii(&'static [&'static [u8]]),
|
||||
Short(&'static [u16]),
|
||||
Rational(&'static [(u32, u32)]),
|
||||
Undefined(&'static [u8]),
|
||||
// Depends on other tags, JPEG markers, etc.
|
||||
ContextDependent,
|
||||
// Unspecified in the Exif standard.
|
||||
Unspecified,
|
||||
}
|
||||
|
||||
impl<'a> From<&'a DefaultValue> for Option<Value<'a>> {
|
||||
fn from(defval: &DefaultValue) -> Option<Value> {
|
||||
match *defval {
|
||||
DefaultValue::None => None,
|
||||
DefaultValue::Byte(s) => Some(Value::Byte(s.to_vec())),
|
||||
DefaultValue::Ascii(s) => Some(Value::Ascii(s.to_vec())),
|
||||
DefaultValue::Short(s) => Some(Value::Short(s.to_vec())),
|
||||
DefaultValue::Rational(s) => Some(Value::Rational(
|
||||
s.iter().map(|&t| tuple2rational(t)).collect())),
|
||||
DefaultValue::Undefined(s) => Some(Value::Undefined(s)),
|
||||
DefaultValue::ContextDependent => None,
|
||||
DefaultValue::Unspecified => None,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// An unsigned rational number, which is a pair of 32-bit unsigned integers.
|
||||
pub struct Rational { pub num: u32, pub denom: u32 }
|
||||
|
||||
fn tuple2rational(t: (u32, u32)) -> Rational {
|
||||
Rational { num: t.0, denom: t.1 }
|
||||
}
|
||||
|
||||
impl fmt::Debug for Rational {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
write!(f, "Rational({}/{})", self.num, self.denom)
|
||||
|
|
|
|||
Loading…
Reference in New Issue