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feat: add luminance variable to FlxColor #3357

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merged 1 commit into from
Feb 4, 2025
Merged

feat: add luminance variable to FlxColor #3357

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11 changes: 11 additions & 0 deletions flixel/util/FlxColor.hx
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,12 @@ abstract FlxColor(Int) from Int from UInt to Int to UInt
*/
public var lightness(get, set):Float;

/**
* The luminance, or "percieved brightness" of a color (from 0 to 1)
* RGB -> Luma calculation from https://www.w3.org/TR/AERT/#color-contrast
*/
public var luminance(get, never):Float;

static var COLOR_REGEX = ~/^(0x|#)(([A-F0-9]{2}){3,4})$/i;

/**
Expand Down Expand Up @@ -741,6 +747,11 @@ abstract FlxColor(Int) from Int from UInt to Int to UInt
return maxColor();
}

inline function get_luminance():Float
{
return (redFloat * 299 + greenFloat * 587 + blueFloat * 114) / 1000;
}

inline function get_saturation():Float
{
return (maxColor() - minColor()) / brightness;
Expand Down