✨ init from https://github.com/codemasher/php-qrcode-decoder/commit/5798a53268f14eb1d7d70098d23db0a81b25f98b

src/Decoder/IMagickLuminanceSource.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * Class IMagickLuminanceSource
+ *
+ * @created      17.01.2021
+ * @author       ZXing Authors
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2021 Smiley
+ * @license      Apache-2.0
+ *
+ * @noinspection PhpComposerExtensionStubsInspection
+ */
+
+namespace chillerlan\QRCode\Decoder;
+
+use Imagick, InvalidArgumentException;
+use function count;
+
+/**
+ * This class is used to help decode images from files which arrive as Imagick Resource
+ * It does not support rotation.
+ */
+final class IMagickLuminanceSource extends LuminanceSource{
+
+	private Imagick $imagick;
+
+	/**
+	 * IMagickLuminanceSource constructor.
+	 *
+	 * @param \Imagick $imagick
+	 *
+	 * @throws \InvalidArgumentException
+	 */
+	public function __construct(Imagick $imagick){
+		parent::__construct($imagick->getImageWidth(), $imagick->getImageHeight());
+
+		$this->imagick = $imagick;
+
+		$this->setLuminancePixels();
+	}
+
+	private function setLuminancePixels():void{
+		$this->imagick->setImageColorspace(Imagick::COLORSPACE_GRAY);
+		$pixels = $this->imagick->exportImagePixels(1, 1, $this->width, $this->height, 'RGB', Imagick::PIXEL_CHAR);
+
+		$countPixels = count($pixels);
+
+		for($i = 0; $i < $countPixels; $i += 3){
+			$this->setLuminancePixel($pixels[$i] & 0xff, $pixels[$i + 1] & 0xff, $pixels[$i + 2] & 0xff);
+		}
+	}
+
+}