---
title: cmInterpolationMask
framework: Application Services
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.0+]
path: applicationservices/1560699-x_profiles/cminterpolationmask
---

# cmInterpolationMask

## Declaration

```occ
cmInterpolationMask = 0x00040000
```

## Discussion

This mask provides access to bit 18 of the `flags` field, which specifies whether to use interpolation in color matching. The value 0 specifies interpolation. The value 1 specifies table lookup without interpolation. Specifying lookup only improves speed but can reduce accuracy. You might use lookup only for a monitor profile, for example, when high resolution is not crucial.

This feature is provided by the ColorSync Manager; it is not defined by the ICC profile specification.