spine-runtimes/spine-lua/Color.lua

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-- Copyright (c) 2013-2019, Esoteric Software LLC
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local setmetatable = setmetatable
local utils = require "spine-lua.utils"

local Color = {}
Color.__index = Color

function Color.new ()
	local self = {
		r = 0, g = 0, b = 0, a = 0
	}
	setmetatable(self, Color)

	return self
end

function Color.newWith (r, g, b, a)
	local self = {
		r = r, g = g, b = b, a = a
	}
	setmetatable(self, Color)

	return self
end

function Color:set(r, g, b, a)
	self.r = r
	self.g = g
	self.b = b
	self.a = a
end

function Color:setFrom(color)
	self.r = color.r
	self.g = color.g
	self.b = color.b
	self.a = color.a
end

function Color:add(r, g, b, a)
	self.r = self.r + r
	self.g = self.g + g
	self.b = self.b + b
	self.a = self.a + a
	self:clamp()
end

function Color:clamp()
	self.r = utils.clamp(self.r, 0, 1)
	self.g = utils.clamp(self.g, 0, 1)
	self.b = utils.clamp(self.b, 0, 1)
	self.a = utils.clamp(self.a, 0, 1)
end

return Color