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19 lines
559 B
PHP
19 lines
559 B
PHP
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<?php
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namespace App\Util\Blurhash;
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final class Color {
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public static function toLinear(int $value): float {
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$value = $value / 255;
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return ($value <= 0.04045)
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? $value / 12.92
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: pow(($value + 0.055) / 1.055, 2.4);
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}
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public static function tosRGB(float $value): int {
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$normalized = max(0, min(1, $value));
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return ($normalized <= 0.0031308)
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? (int) round($normalized * 12.92 * 255 + 0.5)
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: (int) round((1.055 * pow($normalized, 1 / 2.4) - 0.055) * 255 + 0.5);
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}
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}
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