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<?php |
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/** |
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* fast-image-size base class |
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* @package fast-image-size |
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* @copyright (c) Marc Alexander <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace FastImageSize; |
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class FastImageSize |
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{ |
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/** @var array Size info that is returned */ |
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protected $size = array(); |
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/** @var string Data retrieved from remote */ |
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protected $data = ''; |
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/** @var array List of supported image types and associated image types */ |
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protected $supportedTypes = array( |
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'png' => array('png'), |
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'gif' => array('gif'), |
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'jpeg' => array( |
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'jpeg', |
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'jpg', |
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'jpe', |
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'jif', |
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'jfif', |
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'jfi', |
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), |
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'jp2' => array( |
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'jp2', |
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'j2k', |
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'jpf', |
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'jpg2', |
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'jpx', |
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'jpm', |
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), |
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'psd' => array( |
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'psd', |
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'photoshop', |
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), |
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'bmp' => array('bmp'), |
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'tif' => array( |
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'tif', |
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'tiff', |
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), |
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'wbmp' => array( |
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'wbm', |
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'wbmp', |
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'vnd.wap.wbmp', |
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), |
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'iff' => array( |
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'iff', |
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'x-iff', |
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), |
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'ico' => array( |
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'ico', |
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'vnd.microsoft.icon', |
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'x-icon', |
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'icon', |
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), |
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); |
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/** @var array Class map that links image extensions/mime types to class */ |
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protected $classMap; |
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/** @var array An array containing the classes of supported image types */ |
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protected $type; |
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/** |
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* Constructor for fastImageSize class |
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*/ |
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public function __construct() |
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{ |
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foreach ($this->supportedTypes as $imageType => $extension) |
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{ |
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$className = '\FastImageSize\Type\Type' . mb_convert_case(mb_strtolower($imageType), MB_CASE_TITLE); |
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$this->type[$imageType] = new $className($this); |
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// Create class map |
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foreach ($extension as $ext) |
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{ |
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/** @var Type\TypeInterface */ |
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$this->classMap[$ext] = $this->type[$imageType]; |
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} |
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} |
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} |
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/** |
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* Get image dimensions of supplied image |
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* |
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* @param string $file Path to image that should be checked |
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* @param string $type Mimetype of image |
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* @return array|bool Array with image dimensions if successful, false if not |
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*/ |
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public function getImageSize($file, $type = '') |
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{ |
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// Reset values |
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$this->resetValues(); |
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// Treat image type as unknown if extension or mime type is unknown |
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if (!preg_match('/\.([a-z0-9]+)$/i', $file, $match) && empty($type)) |
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{ |
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$this->getImagesizeUnknownType($file); |
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} |
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else |
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{ |
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$extension = (isset($match[1])) ? $match[1] : preg_replace('/.+\/([a-z0-9-.]+)$/i', '$1', $type); |
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$this->getImageSizeByExtension($file, $extension); |
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} |
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return sizeof($this->size) > 1 ? $this->size : false; |
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} |
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/** |
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* Get dimensions of image if type is unknown |
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* |
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* @param string $filename Path to file |
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*/ |
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protected function getImagesizeUnknownType($filename) |
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{ |
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// Grab the maximum amount of bytes we might need |
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$data = $this->getImage($filename, 0, Type\TypeJpeg::JPEG_MAX_HEADER_SIZE, false); |
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if ($data !== false) |
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{ |
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foreach ($this->type as $imageType) |
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{ |
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$imageType->getSize($filename); |
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if (sizeof($this->size) > 1) |
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{ |
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break; |
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} |
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} |
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} |
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} |
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/** |
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* Get image size by file extension |
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* |
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* @param string $file Path to image that should be checked |
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* @param string $extension Extension/type of image |
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*/ |
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protected function getImageSizeByExtension($file, $extension) |
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{ |
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$extension = strtolower($extension); |
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if (isset($this->classMap[$extension])) |
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{ |
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$this->classMap[$extension]->getSize($file); |
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} |
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} |
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/** |
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* Reset values to default |
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*/ |
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protected function resetValues() |
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{ |
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$this->size = array(); |
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$this->data = ''; |
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} |
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/** |
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* Set mime type based on supplied image |
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* |
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* @param int $type Type of image |
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*/ |
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public function setImageType($type) |
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{ |
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$this->size['type'] = $type; |
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} |
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/** |
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* Set size info |
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* |
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* @param array $size Array containing size info for image |
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*/ |
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public function setSize($size) |
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{ |
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$this->size = $size; |
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} |
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/** |
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* Get image from specified path/source |
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* |
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* @param string $filename Path to image |
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* @param int $offset Offset at which reading of the image should start |
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* @param int $length Maximum length that should be read |
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* @param bool $forceLength True if the length needs to be the specified |
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* length, false if not. Default: true |
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* |
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* @return false|string Image data or false if result was empty |
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*/ |
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public function getImage($filename, $offset, $length, $forceLength = true) |
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{ |
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if (empty($this->data)) |
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{ |
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$this->data = @file_get_contents($filename, null, null, $offset, $length); |
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} |
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// Force length to expected one. Return false if data length |
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// is smaller than expected length |
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if ($forceLength === true) |
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{ |
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return (strlen($this->data) < $length) ? false : substr($this->data, $offset, $length) ; |
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} |
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return empty($this->data) ? false : $this->data; |
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} |
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/** |
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* Get return data |
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* |
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* @return array|bool Size array if dimensions could be found, false if not |
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*/ |
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protected function getReturnData() |
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{ |
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return sizeof($this->size) > 1 ? $this->size : false; |
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} |
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} |
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marc1706 /
fast-image-size
