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Fix MQTT rgb light brightness scaling (#89264)

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* Normalize received RGB colors to 100% brightness

* Assert on rgb_color attribute

* Use max for RGB to get brightness

* Avoid division and add clamp

* remove clamp

Co-authored-by: Erik Montnemery <erik@montnemery.com>

---------

Co-authored-by: Erik Montnemery <erik@montnemery.com>
This commit is contained in:
Jan Bouwhuis 2023-03-09 08:02:59 +01:00 • committed by GitHub
parent e5ce8e920d
commit 1a4b14c217
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2 changed files with 28 additions and 5 deletions
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8
homeassistant/components/mqtt/light/schema_basic.py
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@ -495,8 +495,12 @@ class MqttLight(MqttEntity, LightEntity, RestoreEntity):
self._attr_color_mode = color_mode
if self._topic[CONF_BRIGHTNESS_STATE_TOPIC] is None:
rgb = convert_color(*color)
percent_bright = float(color_util.color_RGB_to_hsv(*rgb)[2]) / 100.0
self._attr_brightness = min(round(percent_bright * 255), 255)
brightness = max(rgb)
self._attr_brightness = brightness
# Normalize the color to 100% brightness
color = tuple(
min(round(channel / brightness * 255), 255) for channel in color
)
return color
@callback