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- -- Colors
- white = 1
- orange = 2
- magenta = 4
- lightBlue = 8
- yellow = 16
- lime = 32
- pink = 64
- gray = 128
- lightGray = 256
- cyan = 512
- purple = 1024
- blue = 2048
- brown = 4096
- green = 8192
- red = 16384
- black = 32768
- function combine( ... )
- local r = 0
- for n,c in ipairs( { ... } ) do
- r = bit32.bor(r,c)
- end
- return r
- end
- function subtract( colors, ... )
- local r = colors
- for n,c in ipairs( { ... } ) do
- r = bit32.band(r, bit32.bnot(c))
- end
- return r
- end
- function test( colors, color )
- return ((bit32.band(colors, color)) == color)
- end
- function rgb8( r, g, b )
- if type(r) == "number" and g == nil and b == nil then
- return bit32.band( bit32.rshift( r, 16 ), 0xFF ) / 255, bit32.band( bit32.rshift( r, 8 ), 0xFF ) / 255, bit32.band( r, 0xFF ) / 255
- elseif type(r) == "number" and type(g) == "number" and type(b) == "number" then
- return
- bit32.lshift( bit32.band(r * 255, 0xFF), 16 ) +
- bit32.lshift( bit32.band(g * 255, 0xFF), 8 ) +
- bit32.band(b * 255, 0xFF)
- else
- error( "Expected 1 or 3 numbers", 2 )
- end
- end
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