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<?php declare(strict_types=1); namespace Intervention\Gif\Decoders; use Intervention\Gif\AbstractEntity; use Intervention\Gif\Blocks\DataSubBlock; use Intervention\Gif\Blocks\ImageData; class ImageDataDecoder extends AbstractDecoder { /** * Decode current source * * @return ImageData */ public function decode(): ImageData { $data = new ImageData(); // LZW min. code size $char = $this->getNextByte(); $size = (int) unpack('C', $char)[1]; $data->setLzwMinCodeSize($size); do { // decode sub blocks $char = $this->getNextByte(); $size = (int) unpack('C', $char)[1]; if ($size > 0) { $data->addBlock(new DataSubBlock($this->getNextBytes($size))); } } while ($char !== AbstractEntity::TERMINATOR); return $data; } }
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