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<?php
/**
* Title : Aqua Resizer
* Description : Resizes WordPress images on the fly
* Version : 1.2.0
* Author : Syamil MJ
* Author URI : http://aquagraphite.com
* License : WTFPL - http://sam.zoy.org/wtfpl/
* Documentation : https://github.com/sy4mil/Aqua-Resizer/
*
* @param string $url - (required) must be uploaded using wp media uploader
* @param int $width - (required)
* @param int $height - (optional)
* @param bool $crop - (optional) default to soft crop
* @param bool $single - (optional) returns an array if false
* @return string|array
* @uses image_resize_dimensions()
* @uses wp_get_image_editor()
*
* @uses wp_upload_dir()
*/
if (!defined('ABSPATH')) exit();
class Essential_Grid_Aqua_Resize
{
/**
* The singleton instance
*/
static private $instance = null;
/**
* No initialization allowed
*/
private function __construct()
{
}
/**
* No cloning allowed
*/
private function __clone()
{
}
/**
* For your custom default usage you may want to initialize an Aq_Resize object by yourself and then have own defaults
*/
static public function getInstance()
{
if (self::$instance == null) {
self::$instance = new self;
}
return self::$instance;
}
/**
* Run, forest.
*/
public function process($url, $width = null, $height = null, $crop = null, $single = true, $upscale = false)
{
// Validate inputs.
if (!$url || (!$width && !$height)) return false;
// Caipt'n, ready to hook.
if (true === $upscale) add_filter('image_resize_dimensions', array($this, 'aq_upscale'), 10, 6);
// Define upload path & dir.
$upload_info = wp_upload_dir();
$upload_dir = $upload_info['basedir'];
$upload_url = $upload_info['baseurl'];
$http_prefix = "http://";
$https_prefix = "https://";
/* if the $url scheme differs from $upload_url scheme, make them match
if the schemes differe, images don't show up. */
if (!strncmp($url, $https_prefix, strlen($https_prefix))) {
//if url begins with https:// make $upload_url begin with https:// as well
$upload_url = str_replace($http_prefix, $https_prefix, $upload_url);
} elseif (!strncmp($url, $http_prefix, strlen($http_prefix))) {
//if url begins with http:// make $upload_url begin with http:// as well
$upload_url = str_replace($https_prefix, $http_prefix, $upload_url);
}
// Check if $img_url is local.
if (false === strpos($url, $upload_url)) return false;
// Define path of image.
$rel_path = str_replace($upload_url, '', $url);
$img_path = $upload_dir . $rel_path;
// Check if img path exists, and is an image indeed.
if (!file_exists($img_path) or !getimagesize($img_path)) return false;
// Get image info.
$info = pathinfo($img_path);
$ext = $info['extension'];
list($orig_w, $orig_h) = getimagesize($img_path);
// Get image size after cropping.
$dims = image_resize_dimensions($orig_w, $orig_h, $width, $height, $crop);
if ($dims !== false && isset($dims[4]) && isset($dims[5])) {
$dst_w = $dims[4];
$dst_h = $dims[5];
} else {
$img_url = $url;
$dst_w = $orig_w;
$dst_h = $orig_h;
}
// Return the original image only if it exactly fits the needed measures.
if (!$dims && (((null === $height && $orig_w == $width) xor (null === $width && $orig_h == $height)) xor ($height == $orig_h && $width == $orig_w))) {
$img_url = $url;
$dst_w = $orig_w;
$dst_h = $orig_h;
} else {
// Use this to check if cropped image already exists, so we can return that instead.
$suffix = "{$dst_w}x{$dst_h}";
$dst_rel_path = str_replace('.' . $ext, '', $rel_path);
$destfilename = "{$upload_dir}{$dst_rel_path}-{$suffix}.{$ext}";
if (!$dims || ($crop && !$upscale && ($dst_w < $width || $dst_h < $height))) {
// Can't resize, so return false saying that the action to do could not be processed as planned.
return false;
} // Else check if cache exists.
elseif (file_exists($destfilename) && getimagesize($destfilename)) {
$img_url = "{$upload_url}{$dst_rel_path}-{$suffix}.{$ext}";
} // Else, we resize the image and return the new resized image url.
else {
$editor = wp_get_image_editor($img_path);
if (is_wp_error($editor) || is_wp_error($editor->resize($width, $height, $crop)))
return false;
$resized_file = $editor->save();
if (!is_wp_error($resized_file)) {
$resized_rel_path = str_replace($upload_dir, '', $resized_file['path']);
$img_url = $upload_url . $resized_rel_path;
} else {
return false;
}
}
}
// Okay, leave the ship.
if (true === $upscale) remove_filter('image_resize_dimensions', array($this, 'aq_upscale'));
// Return the output.
if ($single) {
// str return.
$image = $img_url;
} else {
// array return.
$image = array(
0 => $img_url,
1 => $dst_w,
2 => $dst_h
);
}
return $image;
}
/**
* Callback to overwrite WP computing of thumbnail measures
*/
function aq_upscale($default, $orig_w, $orig_h, $dest_w, $dest_h, $crop)
{
if (!$crop) return null; // Let the wordPress default function handle this.
// Here is the point we allow to use larger image size than the original one.
$aspect_ratio = $orig_w / $orig_h;
$new_w = $dest_w;
$new_h = $dest_h;
if (!$new_w) {
$new_w = intval($new_h * $aspect_ratio);
}
if (!$new_h) {
$new_h = intval($new_w / $aspect_ratio);
}
$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
$crop_w = round($new_w / $size_ratio);
$crop_h = round($new_h / $size_ratio);
$s_x = floor(($orig_w - $crop_w) / 2);
$s_y = floor(($orig_h - $crop_h) / 2);
return array(0, 0, (int)$s_x, (int)$s_y, (int)$new_w, (int)$new_h, (int)$crop_w, (int)$crop_h);
}
}
if (!function_exists('esg_aq_resize')) {
/**
* This is just a tiny wrapper function for the class above so that there is no
* need to change any code in your own WP themes. Usage is still the same :)
*/
function esg_aq_resize($url, $width = null, $height = null, $crop = null, $single = true, $upscale = false)
{
$aq_resize = Essential_Grid_Aqua_Resize::getInstance();
$img = $aq_resize->process($url, $width, $height, $crop, $single, $upscale);
if ($single) {
return ($img == '') ? $url : $img;
} else {
return (empty($img)) ? $url : $img;
}
}
}