neiam /lambent_ex

Lambent Aether 5

rgbww strips: the white channel min over a list, not an integer

5318609 · Gabe Morell · 2026-11-04 21:24

7 files +22 -2

modified lib/lambent_ex/scan/8266-7777.ex

+3 −2

@@ -388,7 +388,8 @@ defmodule LambentEx.Scan.ESP8266x7777 do

388	388	end
389	389	end
390	390
391		− defp rgb_shift(stream, device) do
	391	+ @doc false
	392	+ def rgb_shift(stream, device) do
392	393	chunked = Enum.chunk_every(stream, 3)
393	394
394	395	chunked

@@ -398,7 +399,7 @@ defmodule LambentEx.Scan.ESP8266x7777 do

398	399
399	400	defp pixel_order("rgb"), do: fn [r, g, b] -> [g, r, b] end
400	401	defp pixel_order("grb"), do: fn [r, g, b] -> [r, g, b] end
401		− defp pixel_order("rgbww"), do: fn [r, g, b] -> [g, r, b, Enum.min(C.wrgb([r, g, b]), r)] end
	402	+ defp pixel_order("rgbww"), do: fn [r, g, b] -> [g, r, b, Enum.min([C.wrgb([r, g, b]), r])] end
402	403	defp pixel_order("rgbnw"), do: fn [r, g, b] -> [g, r, b, C.wrgb([r, g, b])] end
403	404	defp pixel_order("rgbcw"), do: fn [r, g, b] -> [g, r, b, Enum.min([C.wrgb([r, g, b]), b])] end
404	405

added test/lambent_ex/pixel_order_test.exs

+19 −0

@@ -0,0 +1,19 @@

	1	+defmodule LambentEx.PixelOrderTest do
	2	+ use ExUnit.Case, async: true
	3	+
	4	+ alias LambentEx.Scan.ESP8266x7777, as: Scan
	5	+
	6	+ defp shift(pixels, ord), do: Scan.rgb_shift(pixels, %{"ord" => ord})
	7	+
	8	+ test "rgb strips get green first" do
	9	+ assert shift([200, 100, 50], "rgb") == [100, 200, 50]
	10	+ end
	11	+
	12	+ test "warm white strips get a white channel, held to the red" do
	13	+ assert shift([200, 100, 50, 0, 0, 0], "rgbww") == [100, 200, 50, 25, 0, 0, 0, 0]
	14	+ end
	15	+
	16	+ test "cool white strips get a white channel, held to the blue" do
	17	+ assert shift([200, 100, 50], "rgbcw") == [100, 200, 50, 25]
	18	+ end
	19	+end

Parents: b513f30