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