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v2.2.0 — ICC CMYK pipeline (Perceptual intent)

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@lxman lxman released this 01 Jul 03:49
v2.2.0
8244e76

Minor release: an opt-in ICC-based CMYK color pipeline. Additive and back-compatible — the ICC CMYK path is off by default (PdfColorToRgb.UseIccForDeviceCmyk defaults false), so default-configured consumers render byte-identically to 2.1.0.

Added

  • CMYK ICC color primitives — bidirectional DeviceCmykConverter (CMYK↔sRGB) with a pluggable CmykProfileProvider, bundling an unencumbered CC0 default profile (SWOP_TR003_coated_3). Override via CmykProfileProvider.OverrideProfileBytes (bytes > path > bundled).
  • ICC-accurate DeviceCMYK / Separation rendering behind UseIccForDeviceCmyk, using the Perceptual rendering intent (matches how design apps display press CMYK — realistic black point + tone mapping, vs. RelativeColorimetric rendering darks too light).

Changed

  • DeviceCmykConverter builds its ICC transforms with Perceptual intent. Only affects opt-in consumers; the naive-formula default path is unchanged. Falls back to naive CMYK math if the ICC transform cannot be built.

Publishes Lxman.PdfLibrary and Lxman.PdfLibrary.Rendering.Wpf 2.2.0 to NuGet.

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