---
title: kCGImageDestinationLossyCompressionQuality
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagedestinationlossycompressionquality
---

# kCGImageDestinationLossyCompressionQuality

The desired compression quality to use when writing the image data.

## Declaration

```swift
let kCGImageDestinationLossyCompressionQuality: CFString
```

## Discussion

Discussion If present, the value associated with this key must be a CFNumberRef data type in the range 0.0 to 1.0. A value of 1.0 specifies to use lossless compression if destination format supports it. A value of 0.0 implies to use maximum compression.

## See Also

### Configuring the Image Behaviors

- [kCGImageDestinationBackgroundColor](imageio/kcgimagedestinationbackgroundcolor.md)
- [kCGImageDestinationDateTime](imageio/kcgimagedestinationdatetime.md)
- [kCGImageDestinationEmbedThumbnail](imageio/kcgimagedestinationembedthumbnail.md)
- [kCGImageDestinationImageMaxPixelSize](imageio/kcgimagedestinationimagemaxpixelsize.md)
- [kCGImageDestinationMetadata](imageio/kcgimagedestinationmetadata.md)
- [kCGImageDestinationMergeMetadata](imageio/kcgimagedestinationmergemetadata.md)
- [kCGImageDestinationOptimizeColorForSharing](imageio/kcgimagedestinationoptimizecolorforsharing.md)
- [kCGImageDestinationOrientation](imageio/kcgimagedestinationorientation.md)
- [kCGImageDestinationPreserveGainMap](imageio/kcgimagedestinationpreservegainmap.md)
- [kCGImageMetadataShouldExcludeGPS](imageio/kcgimagemetadatashouldexcludegps.md)
- [kCGImageMetadataShouldExcludeXMP](imageio/kcgimagemetadatashouldexcludexmp.md)