Global Variable


The extended gray color space.


const CFStringRef kCGColorSpaceExtendedGray;


This color space has the same colorimetry as kCGColorSpaceGenericGrayGamma2_2; in addition, you may encode component values below 0.0 and above 1.0. Negative values are encoded as the signed reflection of the original encoding function, as shown below

extendedGrayTransferFunction(x) = sign(x) ✖️ gamma22Function(abs(x))

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