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<?php |
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namespace Spatie\PdfToImage; |
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use Spatie\PdfToImage\Exceptions\InvalidFormat; |
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use Spatie\PdfToImage\Exceptions\PdfDoesNotExist; |
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use Spatie\PdfToImage\Exceptions\PageDoesNotExist; |
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use Spatie\PdfToImage\Exceptions\InvalidLayerMethod; |
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class Pdf |
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{ |
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protected $pdfFile; |
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protected $resolution = 144; |
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protected $outputFormat = 'jpg'; |
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protected $page = 1; |
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protected $imagick; |
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protected $validOutputFormats = ['jpg', 'jpeg', 'png']; |
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protected $layerMethod = \Imagick::LAYERMETHOD_FLATTEN; |
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/** |
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* @param string $pdfFile The path or url to the pdffile. |
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* |
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* @throws \Spatie\PdfToImage\Exceptions\PdfDoesNotExist |
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*/ |
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public function __construct($pdfFile) |
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{ |
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if (! filter_var($pdfFile, FILTER_VALIDATE_URL) && ! file_exists($pdfFile)) { |
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throw new PdfDoesNotExist(); |
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} |
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$this->imagick = new \Imagick($pdfFile); |
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$this->pdfFile = $pdfFile; |
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} |
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/** |
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* Set the raster resolution. |
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* |
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* @param int $resolution |
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* |
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* @return $this |
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*/ |
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public function setResolution($resolution) |
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{ |
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$this->resolution = $resolution; |
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return $this; |
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} |
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/** |
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* Set the output format. |
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* |
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* @param string $outputFormat |
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* |
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* @return $this |
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* |
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* @throws \Spatie\PdfToImage\Exceptions\InvalidFormat |
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*/ |
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public function setOutputFormat($outputFormat) |
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{ |
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if (! $this->isValidOutputFormat($outputFormat)) { |
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throw new InvalidFormat('Format '.$outputFormat.' is not supported'); |
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} |
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$this->outputFormat = $outputFormat; |
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return $this; |
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} |
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/** |
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* Sets the layer method for \Imagicl::mergeImageLayers() |
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* If int, should correspond to a predefined LAYERMETHOD constant. |
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* If null, \Imagicl::mergeImageLayers() will not be called. |
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* |
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* @param int|null |
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* |
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* @return $this |
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* |
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* @throws \Spatie\PdfToImage\Exceptions\InvalidLayerMethod |
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* |
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* @see https://secure.php.net/manual/en/imagick.constants.php |
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* @see Pdf::getImageData() |
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*/ |
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public function setLayerMethod($layerMethod) |
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{ |
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if ( |
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is_int($layerMethod) === false && |
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is_null($layerMethod) === false |
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) { |
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throw new InvalidLayerMethod('LayerMethod must be integer or null'); |
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} |
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$this->layerMethod = $layerMethod; |
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} |
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/** |
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* Determine if the given format is a valid output format. |
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* |
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* @param $outputFormat |
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* |
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* @return bool |
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*/ |
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public function isValidOutputFormat($outputFormat) |
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{ |
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return in_array($outputFormat, $this->validOutputFormats); |
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} |
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/** |
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* Set the page number that should be rendered. |
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* |
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* @param int $page |
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* |
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* @return $this |
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* |
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* @throws \Spatie\PdfToImage\Exceptions\PageDoesNotExist |
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*/ |
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public function setPage($page) |
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{ |
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if ($page > $this->getNumberOfPages()) { |
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throw new PageDoesNotExist('Page '.$page.' does not exist'); |
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} |
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$this->page = $page; |
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return $this; |
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} |
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/** |
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* Get the number of pages in the pdf file. |
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* @return int |
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*/ |
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public function getNumberOfPages() |
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{ |
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return $this->imagick->getNumberImages(); |
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} |
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/** |
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* Save the image to the given path. |
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* @param string $pathToImage |
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* |
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* @return bool |
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*/ |
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public function saveImage($pathToImage) |
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{ |
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$imageData = $this->getImageData($pathToImage); |
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return file_put_contents($pathToImage, $imageData) === false ? false : true; |
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} |
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/** |
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* Save the file as images to the given directory. |
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* |
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* @param string $directory |
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* @param string $prefix |
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* |
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* @return array $files the paths to the created images |
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*/ |
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public function saveAllPagesAsImages($directory, $prefix = '') |
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{ |
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$numberOfPages = $this->getNumberOfPages(); |
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if ($numberOfPages === 0) { |
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return []; |
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} |
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return array_map(function ($pageNumber) use ($directory, $prefix) { |
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$this->setPage($pageNumber); |
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$destination = "{$directory}/{$prefix}{$pageNumber}.{$this->outputFormat}"; |
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$this->saveImage($destination); |
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return $destination; |
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}, range(1, $numberOfPages)); |
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} |
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/** |
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* Return raw image data. |
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* |
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* @param string $pathToImage |
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* |
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* @return \Imagick |
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*/ |
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public function getImageData($pathToImage) |
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{ |
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$this->imagick->setResolution($this->resolution, $this->resolution); |
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$this->imagick->readImage(sprintf('%s[%s]', $this->pdfFile, $this->page - 1)); |
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if (is_int($this->layerMethod)) { |
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$this->imagick->mergeImageLayers($this->layerMethod); |
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} |
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$this->imagick->setFormat($this->determineOutputFormat($pathToImage)); |
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return $this->imagick; |
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} |
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/** |
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* Determine in which format the image must be rendered. |
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* |
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* @param $pathToImage |
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* |
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* @return string |
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*/ |
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protected function determineOutputFormat($pathToImage) |
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{ |
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$outputFormat = pathinfo($pathToImage, PATHINFO_EXTENSION); |
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if ($this->outputFormat != '') { |
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$outputFormat = $this->outputFormat; |
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} |
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$outputFormat = strtolower($outputFormat); |
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if (! $this->isValidOutputFormat($outputFormat)) { |
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$outputFormat = 'jpg'; |
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} |
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return $outputFormat; |
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} |
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} |
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spatie /
pdf-to-image
