509594aec2
Fix #34. Set color_mt on new colors so add, subtract, multiply, is_color work. We don't use ffi for color (32cf0e8), so remove cdata check for 0-based offset indexing. Add tests for creating colours and using operators.
51 lines
1.1 KiB
Lua
51 lines
1.1 KiB
Lua
local color = require "modules.color"
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local DBL_EPSILON = require("modules.constants").DBL_EPSILON
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local function assert_is_float_equal(a, b)
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if math.abs(a - b) > DBL_EPSILON then
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assert.is.equal(a, b)
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end
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end
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describe("color:", function()
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it("operators: add, subract, multiply", function()
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local c = color(1,1,1,1)
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assert.is_true(c:is_color())
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local r = c + c
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assert.is_true(r:is_color())
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assert_is_float_equal(r[1], 2)
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assert_is_float_equal(r[2], 2)
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assert_is_float_equal(r[3], 2)
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r = c - c
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assert.is_true(r:is_color())
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assert_is_float_equal(r[1], 0)
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assert_is_float_equal(r[2], 0)
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assert_is_float_equal(r[3], 0)
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r = c * 5
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assert.is_true(r:is_color())
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assert_is_float_equal(r[1], 5)
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assert_is_float_equal(r[2], 5)
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assert_is_float_equal(r[3], 5)
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end)
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end)
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--[[
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from_hsv(h, s, v)
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from_hsva(h, s, v, a)
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invert(c)
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lighten(c, v)
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lerp(a, b, s)
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darken(c, v)
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multiply(c, v)
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alpha(c, v)
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opacity(c, v)
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hue(color, hue)
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saturation(color, percent)
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value(color, percent)
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gamma_to_linear(r, g, b, a)
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linear_to_gamma(r, g, b, a)
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to_string(a)
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--]]
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