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277 lines
10 KiB
PHP
277 lines
10 KiB
PHP
<?php
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/**
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* Title : Aqua Resizer
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* Description : Resizes WordPress images on the fly
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* Version : 1.2.2
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* Author : Syamil MJ
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* Author URI : http://aquagraphite.com
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* License : WTFPL - http://sam.zoy.org/wtfpl/
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* Documentation : https://github.com/sy4mil/Aqua-Resizer/.
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*
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* @param string $url - (required) must be uploaded using wp media uploader
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* @param int $width - (required)
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* @param int $height - (optional)
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* @param bool $crop - (optional) default to soft crop
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* @param bool $single - (optional) returns an array if false
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* @param bool $upscale - (optional) resizes smaller images
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*
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* @uses wp_upload_dir()
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* @uses image_resize_dimensions()
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* @uses wp_get_image_editor()
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*
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* @return array|string
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*/
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if (!class_exists('Aq_Resize')) {
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class Aq_Exception extends Exception
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{
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}
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class Aq_Resize
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{
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/**
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* Should an Aq_Exception be thrown on error?
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* If false (default), then the error will just be logged.
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*/
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public $throwOnError = false;
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/**
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* The singleton instance.
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*/
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private static $__instance;
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/**
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* No initialization allowed.
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*/
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private function __construct()
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{
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}
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/**
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* No cloning allowed.
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*/
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private function __clone()
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{
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}
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/**
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* For your custom default usage you may want to initialize an Aq_Resize object by yourself and then have own defaults.
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*/
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public static function getInstance()
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{
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if (null == self::$instance) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* Run, forest.
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*
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* @param mixed $url
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* @param null|mixed $width
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* @param null|mixed $height
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* @param null|mixed $crop
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* @param mixed $single
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* @param mixed $upscale
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*/
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public function process($url, $width = null, $height = null, $crop = null, $single = true, $upscale = false)
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{
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try {
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// Validate inputs.
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if (!$url) {
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throw new Aq_Exception('$url parameter is required');
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}
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if (!$width) {
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throw new Aq_Exception('$width parameter is required');
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}
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// Caipt'n, ready to hook.
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if (true === $upscale) {
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add_filter('image_resize_dimensions', [$this, 'aq_upscale'], 10, 6);
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}
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// Define upload path & dir.
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$upload_info = wp_upload_dir();
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$upload_dir = $upload_info['basedir'];
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$upload_url = $upload_info['baseurl'];
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$http_prefix = 'http://';
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$https_prefix = 'https://';
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$relative_prefix = '//'; // The protocol-relative URL
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/* if the $url scheme differs from $upload_url scheme, make them match
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if the schemes differe, images don't show up. */
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if (!strncmp($url, $https_prefix, strlen($https_prefix))) { //if url begins with https:// make $upload_url begin with https:// as well
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$upload_url = str_replace($http_prefix, $https_prefix, $upload_url);
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} elseif (!strncmp($url, $http_prefix, strlen($http_prefix))) { //if url begins with http:// make $upload_url begin with http:// as well
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$upload_url = str_replace($https_prefix, $http_prefix, $upload_url);
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} elseif (!strncmp($url, $relative_prefix, strlen($relative_prefix))) { //if url begins with // make $upload_url begin with // as well
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$upload_url = str_replace([0 => "{$http_prefix}", 1 => "{$https_prefix}"], $relative_prefix, $upload_url);
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}
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// Check if $img_url is local.
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if (false === strpos($url, $upload_url)) {
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throw new Aq_Exception('图片必须是本地图片: '.$url);
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}
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// Define path of image.
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$rel_path = str_replace($upload_url, '', $url);
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$img_path = $upload_dir.$rel_path;
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// Check if img path exists, and is an image indeed.
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if (!file_exists($img_path) or !getimagesize($img_path)) {
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throw new Aq_Exception('图片不存在或者不是一个图片文件: '.$img_path);
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}
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// Get image info.
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$info = pathinfo($img_path);
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$ext = $info['extension'];
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list($orig_w, $orig_h) = getimagesize($img_path);
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// Get image size after cropping.
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$dims = image_resize_dimensions($orig_w, $orig_h, $width, $height, $crop);
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$dst_w = $dims[4];
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$dst_h = $dims[5];
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// Return the original image only if it exactly fits the needed measures.
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if (!$dims || (((null === $height && $orig_w == $width) xor (null === $width && $orig_h == $height)) xor ($height == $orig_h && $width == $orig_w))) {
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$img_url = $url;
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$dst_w = $orig_w;
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$dst_h = $orig_h;
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} else {
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// Use this to check if cropped image already exists, so we can return that instead.
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$suffix = "{$dst_w}x{$dst_h}";
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$dst_rel_path = str_replace('.'.$ext, '', $rel_path);
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$destfilename = "{$upload_dir}{$dst_rel_path}-{$suffix}.{$ext}";
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if (!$dims || (true == $crop && false == $upscale && ($dst_w < $width || $dst_h < $height))) {
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// Can't resize, so return false saying that the action to do could not be processed as planned.
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throw new Aq_Exception('Unable to resize image because image_resize_dimensions() failed');
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}
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// Else check if cache exists.
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if (file_exists($destfilename) && getimagesize($destfilename)) {
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$img_url = "{$upload_url}{$dst_rel_path}-{$suffix}.{$ext}";
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}
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// Else, we resize the image and return the new resized image url.
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else {
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$editor = wp_get_image_editor($img_path);
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if (is_wp_error($editor) || is_wp_error($editor->resize($width, $height, $crop))) {
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throw new Aq_Exception('Unable to get WP_Image_Editor: '.
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$editor->get_error_message().' (is GD or ImageMagick installed?)');
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}
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$resized_file = $editor->save();
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if (!is_wp_error($resized_file)) {
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$resized_rel_path = str_replace($upload_dir, '', $resized_file['path']);
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$img_url = $upload_url.$resized_rel_path;
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} else {
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throw new Aq_Exception('Unable to save resized image file: '.$editor->get_error_message());
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}
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}
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}
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// Okay, leave the ship.
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if (true === $upscale) {
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remove_filter('image_resize_dimensions', [$this, 'aq_upscale']);
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}
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// Return the output.
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if ($single) {
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// str return.
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$image = $img_url;
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} else {
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// array return.
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$image = [
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0 => $img_url,
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1 => $dst_w,
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2 => $dst_h,
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];
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}
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return $image;
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} catch (Aq_Exception $ex) {
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error_log('Aq_Resize.process() error: '.$ex->getMessage());
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if ($this->throwOnError) {
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// Bubble up exception.
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throw $ex;
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}
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// Return false, so that this patch is backwards-compatible.
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return false;
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}
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}
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/**
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* Callback to overwrite WP computing of thumbnail measures.
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*
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* @param mixed $default
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* @param mixed $orig_w
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* @param mixed $orig_h
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* @param mixed $dest_w
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* @param mixed $dest_h
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* @param mixed $crop
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*/
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public function aq_upscale($default, $orig_w, $orig_h, $dest_w, $dest_h, $crop)
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{
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if (!$crop) {
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return null;
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}
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// Let the wordpress default function handle this.
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// Here is the point we allow to use larger image size than the original one.
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$aspect_ratio = $orig_w / $orig_h;
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$new_w = $dest_w;
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$new_h = $dest_h;
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if (!$new_w) {
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$new_w = intval($new_h * $aspect_ratio);
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}
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if (!$new_h) {
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$new_h = intval($new_w / $aspect_ratio);
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}
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$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
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$crop_w = round($new_w / $size_ratio);
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$crop_h = round($new_h / $size_ratio);
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$s_x = floor(($orig_w - $crop_w) / 2);
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$s_y = floor(($orig_h - $crop_h) / 2);
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return [0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h];
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}
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}
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}
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if (!function_exists('aq_resize')) {
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/**
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* This is just a tiny wrapper function for the class above so that there is no
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* need to change any code in your own WP themes. Usage is still the same :).
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*
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* @param mixed $url
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* @param null|mixed $width
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* @param null|mixed $height
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* @param null|mixed $crop
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* @param mixed $single
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* @param mixed $upscale
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*/
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function aq_resize($url, $width = null, $height = null, $crop = null, $single = true, $upscale = false)
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{
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// WPML Fix
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if (defined('ICL_SITEPRESS_VERSION')) {
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global $sitepress;
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$url = $sitepress->convert_url($url, $sitepress->get_default_language());
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}
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// WPML Fix
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$aq_resize = Aq_Resize::getInstance();
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return $aq_resize->process($url, $width, $height, $crop, $single, $upscale);
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}
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}
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