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0.48.1
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An approachable image processing library primarily based upon Vix and libvips that is NIF-based, fast, multi-threaded, pipelined and has a low memory footprint.

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image lib image exif field_names.ex
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lib/image/exif/field_names.ex 

defmodule Image.Exif.FieldNames do

  @moduledoc false



  # Defines the field names with mapping to the relevant

  # EXIF IFD.

  #

  # This is useful for mapping developer and user friendly

  # names to theinternal header names in `libvips`.



  @field_names [

    ["ifd3", "GPSDateStamp"],

    ["ifd3", "GPSMapDatum"],

    ["ifd3", "GPSDOP"],

    ["ifd3", "GPSMeasureMode"],

    ["ifd3", "GPSStatus"],

    ["ifd3", "GPSSatellites"],

    ["ifd3", "GPSTimeStamp"],

    ["ifd3", "GPSAltitude"],

    ["ifd3", "GPSAltitudeRef"],

    ["ifd3", "GPSLongitude"],

    ["ifd3", "GPSLongitudeRef"],

    ["ifd3", "GPSLatitude"],

    ["ifd3", "GPSLatitudeRef"],

    ["ifd3", "GPSVersionID"],

    ["ifd2", "FlashpixVersion"],

    ["ifd2", "LensSerialNumber"],

    ["ifd2", "LensModel"],

    ["ifd2", "LensSpecification"],

    ["ifd2", "BodySerialNumber"],

    ["ifd2", "SceneCaptureType"],

    ["ifd2", "WhiteBalance"],

    ["ifd2", "ExposureMode"],

    ["ifd2", "CustomRendered"],

    ["ifd2", "FocalPlaneResolutionUnit"],

    ["ifd2", "FocalPlaneYResolution"],

    ["ifd2", "FocalPlaneXResolution"],

    ["ifd2", "ColorSpace"],

    ["ifd2", "SubSecTimeDigitized"],

    ["ifd2", "SubSecTimeOriginal"],

    ["ifd2", "FocalLength"],

    ["ifd2", "Flash"],

    ["ifd2", "MeteringMode"],

    ["ifd2", "MaxApertureValue"],

    ["ifd2", "ExposureBiasValue"],

    ["ifd2", "ApertureValue"],

    ["ifd2", "ShutterSpeedValue"],

    ["ifd2", "OffsetTime"],

    ["ifd2", "DateTimeDigitized"],

    ["ifd2", "DateTimeOriginal"],

    ["ifd2", "ExifVersion"],

    ["ifd2", "RecommendedExposureIndex"],

    ["ifd2", "SensitivityType"],

    ["ifd2", "ISOSpeedRatings"],

    ["ifd2", "ExposureProgram"],

    ["ifd2", "FNumber"],

    ["ifd2", "ExposureTime"],

    ["ifd1", "ResolutionUnit"],

    ["ifd1", "YResolution"],

    ["ifd1", "XResolution"],

    ["ifd1", "Compression"],

    ["ifd0", "Copyright"],

    ["ifd0", "Artist"],

    ["ifd0", "DateTime"],

    ["ifd0", "Software"],

    ["ifd0", "ResolutionUnit"],

    ["ifd0", "YResolution"],

    ["ifd0", "XResolution"],

    ["ifd0", "Model"],

    ["ifd0", "Make"],

    ["ifd0", "ImageDescription"]

  ]



  @omit [

    ["ifd1", "YResolution"],

    ["ifd1", "XResolution"],

    ["ifd1", "ResolutionUnit"]

  ]



  for [ifd, name] <- @field_names, [ifd, name] not in @omit do

    vips_header_name = "exif-" <> ifd <> "-" <> name

    field = Macro.underscore(name) |> String.to_atom()



    def vips_header_name(unquote(field)), do: unquote(vips_header_name)

  end

end