<?php /* * Copyright 2014-2015 Florian "Bluewind" Pritz <bluewind@server-speed.net> * * Licensed under AGPLv3 * (see COPYING for full license text) * */ namespace libraries\Image; interface ImageDriver { /** * Replace the current image by reading in a file * @param file file to read */ public function read($file); /** * Return the current image rendered to a specific format. Passing null as * the target_type returns the image in the format of the source image * (loaded with read()). * * @param target_type one of IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG or null * @return binary image data */ public function get($target_type); /** * Resize the image. * @param width * @param height */ public function resize($width, $height); /** * Crop the image to the area defined by x, y, width and height. * * @param x starting coordinate * @param y starting coordinate * @param width width of the area * @param height height of the area */ public function crop($x, $y, $width, $height); /** * Crop/resize the image to fit into the desired size. This also rotates * the image if the source image had an EXIF orientation tag. * * @param width width of the resulting image * @param height height of the resulting image */ public function makeThumb($target_width, $target_height); /** * Rotate the image according to the sources EXIF orientation tag if any. */ public function apply_exif_orientation(); /** * Mirror the image along the x axis. */ public function mirror(); /** * Return priority for this driver. Higher number means a higher priority. * * @param mimetype mimetype of the file * @return > 0 if supported, < 0 if the mimetype can't be handled */ public static function get_priority($mimetype); } namespace libraries; /** * This class deals with a single image and provides useful operations that * operate on this image. */ class Image { private $driver; private static function get_image_drivers() { return array( "libraries\Image\Drivers\GD", "libraries\Image\Drivers\imagemagick", ); } /** * Create a new object and load the contents of file. * @param file file to read */ public function __construct($file) { $this->read($file); } /** * Get the best driver supporting $mimetype. * * @param drivers list of driver classes * @param mimetype mimetype the driver should support * @return driver from $drivers or NULL if no driver supports the type */ private static function best_driver($drivers, $mimetype) { $best = 0; $best_driver = null; foreach ($drivers as $driver) { $current = $driver::get_priority($mimetype); if ($current > $best && $current > 0) { $best_driver = $driver; $best = $current; } } if ($best_driver === NULL) { throw new \exceptions\PublicApiException("libraries/Image/unsupported-image-type", "Unsupported image type"); } return $best_driver; } /** * Check if a mimetype is supported by the image library. * * @param mimetype * @return true if supported, false otherwise */ public static function type_supported($mimetype) { try { $driver = self::best_driver(self::get_image_drivers(), $mimetype); } catch (\exceptions\ApiException $e) { if ($e->get_error_id() == "libraries/Image/unsupported-image-type") { return false; } throw $e; } return true; } /** * Replace the current image by reading in a file * @param file file to read */ public function read($file) { $mimetype = mimetype($file); $driver = self::best_driver(self::get_image_drivers(), $mimetype); $this->driver = new $driver($file); } /** * Return the current image rendered to a specific format. Passing null as * the target_type returns the image in the format of the source image * (loaded with read()). * * @param target_type one of IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG or null * @return binary image data */ public function get($target_type = null) { return $this->driver->get($target_type); } /** * Resize the image. * @param width * @param height */ public function resize($width, $height) { return $this->driver->resize($width, $height); } /** * Crop the image to the area defined by x, y, width and height. * * @param x starting coordinate * @param y starting coordinate * @param width width of the area * @param height height of the area */ public function crop($x, $y, $width, $height) { return $this->driver->crop($x, $y, $width, $height); } /** * Crop/resize the image to fit into the desired size. This also rotates * the image if the source image had an EXIF orientation tag. * * @param width width of the resulting image * @param height height of the resulting image */ public function makeThumb($target_width, $target_height) { return $this->driver->makeThumb($target_width, $target_height); } static public function get_exif_orientation($file) { $exif = \libraries\Exif::get_exif($file); if (isset($exif["Orientation"])) { return $exif["Orientation"]; } return 0; } /** * Rotate the image according to the sources EXIF orientation tag if any. */ public function apply_exif_orientation() { return $this->driver->apply_exif_orientation(); } /** * Mirror the image along the x axis. */ public function mirror() { return $this->driver->mirror(); } }