* @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); } }