commit message

vendor/chillerlan/php-qrcode/src/Common/GDLuminanceSource.php

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+<?php
+/**
+ * Class GDLuminanceSource
+ *
+ * @created      17.01.2021
+ * @author       Ashot Khanamiryan
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2021 Smiley
+ * @license      MIT
+ *
+ * @noinspection PhpComposerExtensionStubsInspection
+ */
+
+namespace chillerlan\QRCode\Common;
+
+use chillerlan\QRCode\Decoder\QRCodeDecoderException;
+use chillerlan\Settings\SettingsContainerInterface;
+use function file_get_contents, get_resource_type, imagecolorat, imagecolorsforindex,
+	imagecreatefromstring, imagefilter, imagesx, imagesy, is_resource;
+use const IMG_FILTER_BRIGHTNESS, IMG_FILTER_CONTRAST, IMG_FILTER_GRAYSCALE, IMG_FILTER_NEGATE, PHP_MAJOR_VERSION;
+
+/**
+ * This class is used to help decode images from files which arrive as GD Resource
+ * It does not support rotation.
+ */
+class GDLuminanceSource extends LuminanceSourceAbstract{
+
+	/**
+	 * @var resource|\GdImage
+	 */
+	protected $gdImage;
+
+	/**
+	 * GDLuminanceSource constructor.
+	 *
+	 * @param resource|\GdImage                                    $gdImage
+	 * @param \chillerlan\Settings\SettingsContainerInterface|null $options
+	 *
+	 * @throws \chillerlan\QRCode\Decoder\QRCodeDecoderException
+	 */
+	public function __construct($gdImage, SettingsContainerInterface $options = null){
+
+		/** @noinspection PhpFullyQualifiedNameUsageInspection */
+		if(
+			(PHP_MAJOR_VERSION >= 8 && !$gdImage instanceof \GdImage) // @todo: remove version check in v6
+			|| (PHP_MAJOR_VERSION < 8 && (!is_resource($gdImage) || get_resource_type($gdImage) !== 'gd'))
+		){
+			throw new QRCodeDecoderException('Invalid GD image source.'); // @codeCoverageIgnore
+		}
+
+		parent::__construct(imagesx($gdImage), imagesy($gdImage), $options);
+
+		$this->gdImage = $gdImage;
+
+		if($this->options->readerGrayscale){
+			imagefilter($this->gdImage,  IMG_FILTER_GRAYSCALE);
+		}
+
+		if($this->options->readerInvertColors){
+			imagefilter($this->gdImage, IMG_FILTER_NEGATE);
+		}
+
+		if($this->options->readerIncreaseContrast){
+			imagefilter($this->gdImage, IMG_FILTER_BRIGHTNESS, -100);
+			imagefilter($this->gdImage, IMG_FILTER_CONTRAST, -100);
+		}
+
+		$this->setLuminancePixels();
+	}
+
+	/**
+	 *
+	 */
+	protected function setLuminancePixels():void{
+
+		for($j = 0; $j < $this->height; $j++){
+			for($i = 0; $i < $this->width; $i++){
+				$argb  = imagecolorat($this->gdImage, $i, $j);
+				$pixel = imagecolorsforindex($this->gdImage, $argb);
+
+				$this->setLuminancePixel($pixel['red'], $pixel['green'], $pixel['blue']);
+			}
+		}
+
+	}
+
+	/** @inheritDoc */
+	public static function fromFile(string $path, SettingsContainerInterface $options = null):self{
+		return new self(imagecreatefromstring(file_get_contents(self::checkFile($path))), $options);
+	}
+
+	/** @inheritDoc */
+	public static function fromBlob(string $blob, SettingsContainerInterface $options = null):self{
+		return new self(imagecreatefromstring($blob), $options);
+	}
+
+}