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LibGfx/ICC: Implement conversion between different connection spaces
If one profile uses PCSXYZ and the other PCSLAB as connection space, we now do the necessary XYZ/LAB conversion. With this and the previous commits, we can now convert from profiles that use PCSLAB with mAB, such as stress.jpeg from https://littlecms.com/blog/2020/09/09/browser-check/ : % Build/lagom/icc --name sRGB --reencode-to serenity-sRGB.icc % Build/lagom/bin/image -o out.png \ --convert-to-color-profile serenity-sRGB.icc \ ~/src/jpegfiles/stress.jpeg
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4 changed files with 40 additions and 10 deletions
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@ -213,7 +213,7 @@ public:
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// Converts from the profile connection space to an 8-bits-per-channel color.
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// The notes on `to_pcs()` apply to this too.
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ErrorOr<void> from_pcs(FloatVector3 const&, Bytes) const;
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ErrorOr<void> from_pcs(Profile const& source_profile, FloatVector3, Bytes) const;
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ErrorOr<CIELAB> to_lab(ReadonlyBytes) const;
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