48 lines
1.2 KiB
Lua
48 lines
1.2 KiB
Lua
local Color = {}
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Color.__index = Color
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function Color.new(hex)
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local self = setmetatable({}, Color)
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hex = hex:gsub("^#", "")
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self.r = tonumber(hex:sub(1, 2), 16)
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self.g = tonumber(hex:sub(3, 4), 16)
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self.b = tonumber(hex:sub(5, 6), 16)
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return self
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end
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function Color:to_css()
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return string.format("#%02x%02x%02x", self.r, self.g, self.b)
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end
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function Color:blend(other, factor)
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other = type(other) == "string" and Color.new(other) or other
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return Color.new(
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string.format(
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"#%02x%02x%02x",
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math.floor(self.r + (other.r - self.r) * factor + 0.5),
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math.floor(self.g + (other.g - self.g) * factor + 0.5),
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math.floor(self.b + (other.b - self.b) * factor + 0.5)
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)
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)
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end
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function Color:darken(amount)
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return self:blend("#000000", amount)
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end
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function Color:lighten(amount)
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return self:blend("#ffffff", amount)
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end
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function Color:saturate(factor)
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local gray = math.floor(0.299 * self.r + 0.587 * self.g + 0.114 * self.b + 0.5)
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local gray_color = Color.new(string.format("#%02x%02x%02x", gray, gray, gray))
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return self:blend(gray_color, 1 - factor)
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end
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return setmetatable(Color, {
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__call = function(_, hex)
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return Color.new(hex)
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end,
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})
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