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Add conversion from CMY to RGB and back #574

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Add conversion from CMY to RGB and back #574

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9 changes: 9 additions & 0 deletions src/conversions.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -213,6 +213,11 @@ cnvt(::Type{CV}, c::Union{DIN99d, DIN99o, DIN99}) where {CV<:AbstractRGB} = cnvt
error("No conversion of ", c, " to ", CV, " has been defined")
end

function cnvt(::Type{CV}, c::CMY) where CV<:AbstractRGB
_one = one(c.c)
CV(_one - c.c, _one - c.m, _one - c.y)
end

# AbstractGray --> AbstractRGB conversions are implemented in ColorTypes.jl


Expand Down Expand Up @@ -811,6 +816,10 @@ end

cnvt(::Type{YCbCr{T}}, c::Color) where {T} = cnvt(YCbCr{T}, convert(RGB{T}, c)::RGB{T})

function cnvt(::Type{CMY{T}}, c::AbstractRGB) where T
_one = one(c.r)
CMY(_one - c.r, _one - c.g, _one - c.b)
end

# To Gray
# -------
Expand Down
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