added color

tests/lua/color_tests.lua

@@ -0,0 +1,96 @@
+local function approx(a, b, eps) return math.abs(a - b) < (eps or 1e-4) end
+
+function Color_Constructor_float()
+    local c = omath.Color.new(1, 0.5, 0.25, 1)
+    assert(approx(c.r, 1) and approx(c.g, 0.5) and approx(c.b, 0.25) and approx(c.a, 1))
+end
+
+function Color_Constructor_default()
+    local c = omath.Color.new()
+    assert(c ~= nil)
+end
+
+function Color_Constructor_clamping()
+    local c = omath.Color.new(2, -1, 0.5, 1)
+    assert(approx(c.r, 1) and approx(c.g, 0) and approx(c.b, 0.5))
+end
+
+function Color_from_rgba()
+    local c = omath.Color.from_rgba(255, 128, 0, 255)
+    assert(approx(c.r, 1) and approx(c.g, 128/255) and approx(c.b, 0) and approx(c.a, 1))
+end
+
+function Color_from_hsv_components()
+    local c = omath.Color.from_hsv(0, 1, 1)
+    assert(approx(c.r, 1) and approx(c.g, 0) and approx(c.b, 0))
+end
+
+function Color_from_hsv_struct()
+    local hsv = omath.Hsv.new()
+    hsv.hue = 0
+    hsv.saturation = 1
+    hsv.value = 1
+    local c = omath.Color.from_hsv(hsv)
+    assert(approx(c.r, 1) and approx(c.g, 0) and approx(c.b, 0))
+end
+
+function Color_red()
+    local c = omath.Color.red()
+    assert(approx(c.r, 1) and approx(c.g, 0) and approx(c.b, 0) and approx(c.a, 1))
+end
+
+function Color_green()
+    local c = omath.Color.green()
+    assert(approx(c.r, 0) and approx(c.g, 1) and approx(c.b, 0) and approx(c.a, 1))
+end
+
+function Color_blue()
+    local c = omath.Color.blue()
+    assert(approx(c.r, 0) and approx(c.g, 0) and approx(c.b, 1) and approx(c.a, 1))
+end
+
+function Color_to_hsv()
+    local hsv = omath.Color.red():to_hsv()
+    assert(approx(hsv.hue, 0) and approx(hsv.saturation, 1) and approx(hsv.value, 1))
+end
+
+function Color_set_hue()
+    local c = omath.Color.red()
+    c:set_hue(1/3)
+    assert(approx(c.g, 1, 1e-3))
+end
+
+function Color_set_saturation()
+    local c = omath.Color.red()
+    c:set_saturation(0)
+    assert(approx(c.r, c.g) and approx(c.g, c.b))
+end
+
+function Color_set_value()
+    local c = omath.Color.red()
+    c:set_value(0)
+    assert(approx(c.r, 0) and approx(c.g, 0) and approx(c.b, 0))
+end
+
+function Color_blend()
+    local c = omath.Color.red():blend(omath.Color.blue(), 0.5)
+    assert(approx(c.r, 0.5) and approx(c.b, 0.5))
+end
+
+function Color_blend_clamped_ratio()
+    local c = omath.Color.red():blend(omath.Color.blue(), 2.0)
+    assert(approx(c.r, 0) and approx(c.b, 1))
+end
+
+function Color_to_string()
+    local s = tostring(omath.Color.red())
+    assert(s == "[r:255, g:0, b:0, a:255]")
+end
+
+function Hsv_fields()
+    local hsv = omath.Hsv.new()
+    hsv.hue = 0.5
+    hsv.saturation = 0.8
+    hsv.value = 0.9
+    assert(approx(hsv.hue, 0.5) and approx(hsv.saturation, 0.8) and approx(hsv.value, 0.9))
+end