ColorBlendModes

This package provides the definitions and compositing operations of the blend modes.

The behavior of this package is based on the CSS Compositing and Blending Level 1.

Basic usage

For details of the API, see Blending and Compositing.

julia> using ColorBlendModes, ColorTypes, FixedPointNumbers;

julia> BlendMultiply(RGB{Float32}(1.0, 0.5, 0.0), RGB{Float32}(0.5, 0.5, 0.5))
RGB{Float32}(0.5f0,0.25f0,0.0f0)

julia> blend(RGB(1, 1, 0), RGB(0, 1, 1), mode=BlendDarken)
RGB{N0f8}(0.0,1.0,0.0)

julia> image1 = [RGB(r, 1, b) for r=0:1, b=0:1]
2×2 Array{RGB{N0f8},2} with eltype RGB{Normed{UInt8,8}}:
 RGB{N0f8}(0.0,1.0,0.0)  RGB{N0f8}(0.0,1.0,1.0)
 RGB{N0f8}(1.0,1.0,0.0)  RGB{N0f8}(1.0,1.0,1.0)

julia> image2 = [RGB(r, g, 0) for g=0:1, r=0:1]
2×2 Array{RGB{N0f8},2} with eltype RGB{Normed{UInt8,8}}:
 RGB{N0f8}(0.0,0.0,0.0)  RGB{N0f8}(1.0,0.0,0.0)
 RGB{N0f8}(0.0,1.0,0.0)  RGB{N0f8}(1.0,1.0,0.0)

julia> BlendDifference.(image1, image2)
2×2 Array{RGB{N0f8},2} with eltype RGB{Normed{UInt8,8}}:
 RGB{N0f8}(0.0,1.0,0.0)  RGB{N0f8}(1.0,1.0,1.0)
 RGB{N0f8}(1.0,0.0,0.0)  RGB{N0f8}(0.0,0.0,1.0)