Implement ColorspaceInterface::channels()

Author: olivervogel

src/Colors/AbstractColorspace.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Colors;
+
+use Intervention\Image\Interfaces\ColorspaceInterface;
+
+abstract class AbstractColorspace implements ColorspaceInterface
+{
+    /**
+     * Channel class names of colorspace.
+     *
+     * @var array<string>
+     */
+    protected static array $channels = [];
+
+    /**
+     * {@inheritdoc}
+     *
+     * @see ColorspaceInterface::channels()
+     */
+    public static function channels(): array
+    {
+        return static::$channels;
+    }
+}

src/Colors/AlphaColorChannel.php

@@ -16,7 +16,7 @@ abstract class AlphaColorChannel extends AbstractColorChannel
     /**
      * @throws InvalidArgumentException
      */
-    final public function __construct(float $value)
+    final public function __construct(float $value = 1)
     {
         if ($value < 0 || $value > 1) {
             throw new InvalidArgumentException(

src/Colors/Cmyk/Colorspace.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Colors\Cmyk;
 
+use Intervention\Image\Colors\AbstractColorspace;
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
 use Intervention\Image\Colors\Hsl\Color as HslColor;
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
@@ -15,10 +16,9 @@
 use Intervention\Image\Exceptions\InvalidArgumentException;
 use Intervention\Image\Exceptions\NotSupportedException;
 use Intervention\Image\Interfaces\ColorInterface;
-use Intervention\Image\Interfaces\ColorspaceInterface;
 use TypeError;
 
-class Colorspace implements ColorspaceInterface
+class Colorspace extends AbstractColorspace
 {
     /**
      * Channel class names of colorspace.

src/Colors/Hsl/Colorspace.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Colors\Hsl;
 
+use Intervention\Image\Colors\AbstractColorspace;
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
 use Intervention\Image\Colors\Hsl\Color as HslColor;
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
@@ -16,10 +17,9 @@
 use Intervention\Image\Exceptions\NotSupportedException;
 use Intervention\Image\Interfaces\ColorChannelInterface;
 use Intervention\Image\Interfaces\ColorInterface;
-use Intervention\Image\Interfaces\ColorspaceInterface;
 use TypeError;
 
-class Colorspace implements ColorspaceInterface
+class Colorspace extends AbstractColorspace
 {
     /**
      * Channel class names of colorspace.

src/Colors/Hsv/Colorspace.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Colors\Hsv;
 
+use Intervention\Image\Colors\AbstractColorspace;
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
 use Intervention\Image\Colors\Hsl\Color as HslColor;
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
@@ -16,10 +17,9 @@
 use Intervention\Image\Exceptions\NotSupportedException;
 use Intervention\Image\Interfaces\ColorChannelInterface;
 use Intervention\Image\Interfaces\ColorInterface;
-use Intervention\Image\Interfaces\ColorspaceInterface;
 use TypeError;
 
-class Colorspace implements ColorspaceInterface
+class Colorspace extends AbstractColorspace
 {
     /**
      * Channel class names of colorspace.

src/Colors/Oklab/Colorspace.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Colors\Oklab;
 
+use Intervention\Image\Colors\AbstractColorspace;
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
 use Intervention\Image\Colors\Hsl\Color as HslColor;
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
@@ -15,10 +16,9 @@
 use Intervention\Image\Exceptions\InvalidArgumentException;
 use Intervention\Image\Exceptions\NotSupportedException;
 use Intervention\Image\Interfaces\ColorInterface;
-use Intervention\Image\Interfaces\ColorspaceInterface;
 use TypeError;
 
-class Colorspace implements ColorspaceInterface
+class Colorspace extends AbstractColorspace
 {
     /**
      * Channel class names of colorspace.

src/Colors/Oklch/Colorspace.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Colors\Oklch;
 
+use Intervention\Image\Colors\AbstractColorspace;
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
 use Intervention\Image\Colors\Hsl\Color as HslColor;
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
@@ -20,10 +21,9 @@
 use Intervention\Image\Exceptions\InvalidArgumentException;
 use Intervention\Image\Exceptions\NotSupportedException;
 use Intervention\Image\Interfaces\ColorInterface;
-use Intervention\Image\Interfaces\ColorspaceInterface;
 use TypeError;
 
-class Colorspace implements ColorspaceInterface
+class Colorspace extends AbstractColorspace
 {
     /**
      * Channel class names of colorspace.

src/Colors/Rgb/Colorspace.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Colors\Rgb;
 
+use Intervention\Image\Colors\AbstractColorspace;
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
 use Intervention\Image\Colors\Hsl\Color as HslColor;
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
@@ -16,10 +17,9 @@
 use Intervention\Image\Exceptions\NotSupportedException;
 use Intervention\Image\Interfaces\ColorChannelInterface;
 use Intervention\Image\Interfaces\ColorInterface;
-use Intervention\Image\Interfaces\ColorspaceInterface;
 use TypeError;
 
-class Colorspace implements ColorspaceInterface
+class Colorspace extends AbstractColorspace
 {
     /**
      * Channel class names of colorspace.

src/Interfaces/ColorspaceInterface.php

@@ -7,14 +7,21 @@
 interface ColorspaceInterface
 {
     /**
-     * Convert given color to the format of the current colorspace.
+     * Return array of all color channel classnames of the colorspace.
+     *
+     * @return array<string>
      */
-    public function importColor(ColorInterface $color): ColorInterface;
+    public static function channels(): array;
 
     /**
      * Create new color in colorspace from given normalized (0-1) channel values.
      *
      * @param array<float> $normalized
      */
     public static function colorFromNormalized(array $normalized): ColorInterface;
+
+    /**
+     * Convert given color to the format of the current colorspace.
+     */
+    public function importColor(ColorInterface $color): ColorInterface;
 }