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<?php |
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/** |
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* File containing the class {@see FormatsConverter}. |
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* |
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* @see FormatsConverter |
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*@subpackage RGBAColor |
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* @package AppUtils |
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*/ |
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declare(strict_types=1); |
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namespace AppUtils\RGBAColor; |
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/** |
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* The converter static class is used to convert between color |
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* information formats. |
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* |
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* @package AppUtils |
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* @subpackage RGBAColor |
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* @author Sebastian Mordziol <[email protected]> |
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*/ |
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class UnitsConverter |
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{ |
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private static int $floatPrecision = 2; |
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/** |
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* @param string $hex |
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* @return int 0 to 255 |
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*/ |
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public static function hex2int(string $hex) : int |
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{ |
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return (int)hexdec($hex); |
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} |
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/** |
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* Converts a color value to a percentage. |
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* @param int $eightBit 0 to 255 |
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* @return float 0 to 100 |
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*/ |
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public static function intEightBit2Percent(int $eightBit) : float |
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{ |
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return $eightBit * 100 / 255; |
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} |
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/** |
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* @param int $colorValue 0 to 127 |
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* @return float 0 to 100 |
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*/ |
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public static function intSevenBit2Percent(int $colorValue) : float |
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{ |
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return $colorValue * 100 / 127; |
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} |
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/** |
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* Converts a percentage to an integer color value. |
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* @param float $percent 0 to 100 |
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* @return int 0 to 255 |
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*/ |
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public static function percent2IntEightBit(float $percent) : int |
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{ |
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$value = $percent * 255 / 100; |
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return (int)round($value, 0, PHP_ROUND_HALF_UP); |
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} |
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/** |
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* @param float $percent 0 to 100 |
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* @return int 0 to 127 |
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*/ |
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public static function percent2IntSevenBit(float $percent) : int |
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{ |
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$value = $percent * 127 / 100; |
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return (int)round($value, 0, PHP_ROUND_HALF_UP); |
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} |
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/** |
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* Converts an alpha value based on a 0-255 numeric |
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* value to a 0-1 based float value. |
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* |
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* @param int $eightBit 255 |
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* @return float 0.0 to 1.0 |
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*/ |
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public static function intEightBit2Alpha(int $eightBit) : float |
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{ |
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return round($eightBit / 255, self::$floatPrecision); |
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} |
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/** |
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* @param int $eightBit 0 to 255 |
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* @return int 0 to 127 |
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*/ |
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public static function intEightBit2IntSevenBit(int $eightBit) : int |
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{ |
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return (int)round($eightBit * 127 / 255); |
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} |
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/** |
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* @param int $sevenBit 0 to 127 |
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* @return int 0 to 255 |
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*/ |
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public static function intSevenBit2IntEightBit(int $sevenBit) : int |
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{ |
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return (int)round($sevenBit * 255 / 127); |
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} |
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/** |
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* @param int $sevenBit 0 to 127 |
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* @return float 0.0 to 1.0 |
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*/ |
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public static function intSevenBit2Alpha(int $sevenBit) : float |
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{ |
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return round($sevenBit / 127, self::$floatPrecision); |
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} |
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/** |
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* @param float $alpha 0.0 to 1.0 |
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* @return int 0 to 255 |
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*/ |
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public static function alpha2IntEightBit(float $alpha) : int |
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{ |
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return (int)round($alpha * 255); |
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} |
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/** |
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* @param float $alpha 0.0 to 1.0 |
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* @return int 0 to 127 |
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*/ |
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public static function alpha2IntSevenBit(float $alpha) : int |
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{ |
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return (int)round($alpha * 127); |
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} |
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/** |
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* @param float $percent 0-100 |
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* @return float 0.0-1.0 |
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*/ |
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public static function percent2Alpha(float $percent) : float |
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{ |
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return round($percent/100, self::$floatPrecision); |
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} |
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/** |
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* @param float $alpha 0.0-1.0 |
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* @return float 0-100 |
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*/ |
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public static function alpha2percent(float $alpha) : float |
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{ |
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return $alpha * 100; |
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} |
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/** |
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* Converts an integer to a HEX color string. This differs |
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* from the native `dechex()` function, in that it will |
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* return `00` for the color string instead of the default |
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* `0` provided by `dechex()`. |
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* |
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* @param int $int |
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* @return string |
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*/ |
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public static function int2hex(int $int) : string |
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{ |
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$str = dechex($int); |
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if (strlen($str) === 1) |
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{ |
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$str = str_pad($str, 2, '0', STR_PAD_LEFT); |
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} |
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return strtoupper($str); |
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} |
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/** |
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* @param float $hue 0-360 |
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* @return int 127 |
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*/ |
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public static function hue2IntSevenBit(float $hue) : int |
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{ |
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return (int)round($hue * 360 / 127); |
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} |
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/** |
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* @param float $hue 0-360 |
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* @return int 0-255 |
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*/ |
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public static function hue2IntEightBit(float $hue) : int |
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{ |
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return (int)round($hue * 360 / 255); |
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} |
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/** |
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* @param float $hue 0-360 |
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* @return float 0.0-1.0 |
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*/ |
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public static function hue2Alpha(float $hue) : float |
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{ |
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return round($hue / 360, self::$floatPrecision); |
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} |
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/** |
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* @param float $hue 0-360 |
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* @return float 0-100 |
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*/ |
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public static function hue2Percent(float $hue) : float |
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{ |
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return $hue * 100 / 360; |
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} |
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} |
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