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Queries the list of keys for all the properties in the image source.

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
CGImageSource 3.4 Yes No Yes, macOS only No Yes

MBS( "CGImageSource.Keys"; Ref; Index )


Parameter Description Example value
Ref The image source reference number returned by CGImageSource.CreateWithData, CGImageSource.CreateWithPath or CGImageSource.CreateWithURL $ref
Index The index of the image to query. -1 for global properties. Else a number from 0 to CGImageSource.Count-1. 0


Returns the list of keys or error message.


Queries the list of keys for all the properties in the image source.
The list of keys varies depending on which image format is used and whether EXIF, IPTC or XMP metadata is available.

e.g. keys for a JPEG image:
{TIFF}.Software, {TIFF}.Orientation, {TIFF}.DateTime, {TIFF}.Artist, {TIFF}.Make, {TIFF}.Model, Depth, {IPTC}.Byline, {IPTC}.SpecialInstructions, {IPTC}.DigitalCreationDate, {IPTC}.DigitalCreationTime, {IPTC}.DateCreated, {IPTC}.TimeCreated, {IPTC}.StarRating, PixelHeight, {Exif}.ExifVersion, {Exif}.Flash, {Exif}.CameraOwnerName, {Exif}.LensModel, {Exif}.RecommendedExposureIndex, {Exif}.SubsecTimeOriginal, {Exif}.ExposureMode, {Exif}.LensSpecification, {Exif}.LensSerialNumber, {Exif}.FNumber, {Exif}.PixelYDimension, {Exif}.ApertureValue, {Exif}.FocalPlaneXResolution, {Exif}.MeteringMode, {Exif}.FocalPlaneResolutionUnit, {Exif}.ISOSpeedRatings, {Exif}.ExposureBiasValue, {Exif}.ShutterSpeedValue, {Exif}.SceneCaptureType, {Exif}.MaxApertureValue, {Exif}.CustomRendered, {Exif}.FocalLength, {Exif}.FocalPlaneYResolution, {Exif}.DateTimeOriginal, {Exif}.FlashPixVersion, {Exif}.SubsecTime, {Exif}.ColorSpace, {Exif}.PixelXDimension, {Exif}.SubsecTimeDigitized, {Exif}.SensitivityType, {Exif}.DateTimeDigitized, {Exif}.BodySerialNumber, {Exif}.ComponentsConfiguration, {Exif}.WhiteBalance, {Exif}.ExposureTime, {Exif}.ExposureProgram, {JFIF}.DensityUnit, {JFIF}.YDensity, {JFIF}.JFIFVersion, {JFIF}.XDensity, ProfileName, DPIWidth, {ExifAux}.LensID, {ExifAux}.SerialNumber, {ExifAux}.FlashCompensation, {ExifAux}.LensInfo, {ExifAux}.LensSerialNumber, {ExifAux}.LensModel, {ExifAux}.Firmware, DPIHeight, ColorModel, Orientation and PixelWidth.


Queries keys for an image:

Set Variable [ $img ; Value: MBS( "CGImageSource.CreateWithData"; test::input ) ]
Show Custom Dialog [ "Keys" ; MBS( "CGImageSource.Keys"; $img; 0) ]
Set Variable [ $r ; Value: MBS( "CGImageSource.Release"; $img ) ]

See also

Example Databases

CGImageSource.ImageAtIndex   -   CGImageSource.Properties

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