*/ public static array $channels = [ Channels\Red::class, Channels\Green::class, Channels\Blue::class, Channels\Alpha::class ]; /** * {@inheritdoc} * * @see ColorspaceInterface::colorFromNormalized() */ public function colorFromNormalized(array $normalized): ColorInterface { $values = array_map(function ($classname, $value_normalized) { return (new $classname(normalized: $value_normalized))->value(); }, self::$channels, $normalized); return new Color(...$values); } /** * @param ColorInterface $color * @return ColorInterface * @throws ColorException */ public function importColor(ColorInterface $color): ColorInterface { return match ($color::class) { CmykColor::class => $this->importCmykColor($color), HsvColor::class => $this->importHsvColor($color), HslColor::class => $this->importHslColor($color), default => $color, }; } /** * @param ColorInterface $color * @return ColorInterface * @throws ColorException */ protected function importCmykColor(ColorInterface $color): ColorInterface { if (!($color instanceof CmykColor)) { throw new ColorException('Unabled to import color of type ' . $color::class . '.'); } return new Color( (int) (255 * (1 - $color->cyan()->normalize()) * (1 - $color->key()->normalize())), (int) (255 * (1 - $color->magenta()->normalize()) * (1 - $color->key()->normalize())), (int) (255 * (1 - $color->yellow()->normalize()) * (1 - $color->key()->normalize())), ); } /** * @param ColorInterface $color * @return ColorInterface * @throws ColorException */ protected function importHsvColor(ColorInterface $color): ColorInterface { if (!($color instanceof HsvColor)) { throw new ColorException('Unabled to import color of type ' . $color::class . '.'); } $chroma = $color->value()->normalize() * $color->saturation()->normalize(); $hue = $color->hue()->normalize() * 6; $x = $chroma * (1 - abs(fmod($hue, 2) - 1)); // connect channel values $values = match (true) { $hue < 1 => [$chroma, $x, 0], $hue < 2 => [$x, $chroma, 0], $hue < 3 => [0, $chroma, $x], $hue < 4 => [0, $x, $chroma], $hue < 5 => [$x, 0, $chroma], default => [$chroma, 0, $x], }; // add to each value $values = array_map(function ($value) use ($color, $chroma) { return $value + $color->value()->normalize() - $chroma; }, $values); array_push($values, 1); // append alpha channel value return $this->colorFromNormalized($values); } /** * @param ColorInterface $color * @return ColorInterface * @throws ColorException */ protected function importHslColor(ColorInterface $color): ColorInterface { if (!($color instanceof HslColor)) { throw new ColorException('Unabled to import color of type ' . $color::class . '.'); } // normalized values of hsl channels list($h, $s, $l) = array_map(function ($channel) { return $channel->normalize(); }, $color->channels()); $c = (1 - abs(2 * $l - 1)) * $s; $x = $c * (1 - abs(fmod($h * 6, 2) - 1)); $m = $l - $c / 2; $values = match (true) { $h < 1 / 6 => [$c, $x, 0], $h < 2 / 6 => [$x, $c, 0], $h < 3 / 6 => [0, $c, $x], $h < 4 / 6 => [0, $x, $c], $h < 5 / 6 => [$x, 0, $c], default => [$c, 0, $x], }; $values = array_map(function ($value) use ($m) { return $value + $m; }, $values); array_push($values, 1); // append alpha channel value return $this->colorFromNormalized($values); } }