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<?php |
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/** |
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* Color Modifier Class |
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* ==================== |
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* Allows you to modify the various aspects of a 'color' instance |
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*/ |
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namespace projectcleverweb\color; |
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/** |
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* Color Modifier Class |
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* ==================== |
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* Allows you to modify the various aspects of a 'color' instance |
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*/ |
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class modify { |
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public static function rgb(color $color, string $scope, float $adjustment, bool $as_percentage, bool $set_absolute) { |
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$current = array_combine(['red', 'green', 'blue'], $color->rgb); |
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$scope = strtolower($scope); |
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$adjustment = max(min($adjustment, 255), 0 - 255); // Force valid range |
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$adjustment = static::_convert_to_exact($adjustment, 255, $as_percentage); |
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$current[$scope] = static::_convert_to_abs($current[$scope], $adjustment, $set_absolute, 0, 255); |
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return static::regenerate_rgb($color, $current, $scope); |
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} |
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public static function hsl(color $color, string $scope, float $adjustment, bool $as_percentage, bool $set_absolute) { |
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$current = array_combine(['hue', 'saturation', 'light'], $color->hsl()); |
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$scope = strtolower($scope); |
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$max = 100; |
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if ($scope == 'hue') { |
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$max = 359; |
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} |
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$adjustment = max(min($adjustment, $max), 0 - $max); // Force valid range |
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$adjustment = static::_convert_to_exact($adjustment, $max, $as_percentage); |
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$current[$scope] = static::_convert_to_abs($current[$scope], $adjustment, $set_absolute, 0, $max); |
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return static::regenerate_hsl($color, $current, $scope); |
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} |
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protected static function _convert_to_exact(float $adjustment, float $max, bool $as_percentage) { |
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if ($as_percentage) { |
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return ($adjustment / 100) * abs($max); |
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} |
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return $adjustment; |
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} |
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protected static function _convert_to_abs(float $current, float $adjustment, bool $set_absolute, float $min = 0, float $max = PHP_INT_MAX) { |
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if ($set_absolute) { |
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return abs($adjustment); |
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} |
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return max(min($current + $adjustment, $max), $min); |
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} |
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protected static function regenerate_rgb(color $color, array $update, string $return_offset = '') { |
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$color->import_rgb([ |
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'r' => $update['red'], |
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'g' => $update['green'], |
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'b' => $update['blue'] |
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]); |
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if (isset($update[$return_offset])) { |
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return $update[$return_offset]; |
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} |
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} |
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protected static function regenerate_hsl(color $color, array $update, string $return_offset = '') { |
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$color->import_hsl([ |
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'h' => $update['hue'], |
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's' => $update['saturation'], |
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'l' => $update['light'] |
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]); |
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if (isset($update[$return_offset])) { |
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return $update[$return_offset]; |
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} |
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} |
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} |
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ProjectCleverWeb /
PHP-Color
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