Add support for extended data spaces

[maxderhak]

The extended data colorspace extension was approved https://www.color.org/iccmax/download/extendedDeviceColorSpace-amendment.pdf

Support is needed for the additional tag types and tags. Command line tools should be updated to work with these as well.

[xsscx]

Maintainer Summary

2026-03-27 08:28:36 UTC

This minor revision of the iccMAX specification ICC.2:2023 was passed by the ICC Steering Committee on 30 October 2025. It extends the allowable device colour space signatures to allow for both spectral spaces to be defined with associated spectral ranges, and provide separate associated Profile Connection Conditions for the source space in abstract profiles.

1. Extends colorSpace (header field §7.2.8, offset 2081) to allow spectral signatures from Table 21 (the same enum values as spectralPCS)
2. When colorSpace uses a spectral signature, the range must come from either:

• New deviceSpectralRangeTag ('dsrn') containing spectralRangeType ('srng'), OR
• The existing spectralRange/biSpectralRange header fields (§7.2.22/23)

3. There are three new tag types to handle: devicePccTag ('dpcc') for abstract profiles, spectralRangeType ('srng') as 20-byte structure, and profileConnectionConditionsStructure ('pcc ') with six required sub-tags.

• Adding to libIccTest
  • PAWG Report

[xsscx]

Maintainer Status

2026-04-07 03:13:47 UTC

A portion of this work has been completed during libIccTest development.

ETA Soon