mirror of
https://github.com/pixelfed/pixelfed.git
synced 2024-11-06 06:44:50 +00:00
19 lines
559 B
PHP
19 lines
559 B
PHP
|
<?php
|
||
|
|
|
||
|
|
namespace App\Util\Blurhash;
|
||
|
|
|
||
|
|
final class Color {
|
||
|
|
public static function toLinear(int $value): float {
|
||
|
|
$value = $value / 255;
|
||
|
|
return ($value <= 0.04045)
|
||
|
|
? $value / 12.92
|
||
|
|
: pow(($value + 0.055) / 1.055, 2.4);
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function tosRGB(float $value): int {
|
||
|
|
$normalized = max(0, min(1, $value));
|
||
|
|
return ($normalized <= 0.0031308)
|
||
|
|
? (int) round($normalized * 12.92 * 255 + 0.5)
|
||
|
|
: (int) round((1.055 * pow($normalized, 1 / 2.4) - 0.055) * 255 + 0.5);
|
||
|
|
}
|
||
|
|
}
|