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<?php
/**
* Function used to resize and crop images
*
* Inspired by Aqua Resizer: https://github.com/syamilmj/Aqua-Resizer
*
* @package Wanderfuls WordPress Theme
* @subpackage Framework
*/
// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
// Start Class
if ( ! class_exists( 'TB_Image_Resize' ) ) {
class TB_Image_Resize {
private $retina_enabled;
/**
* No initialization allowed
* Constructor defines variables only
*
* @since 1.0.0
*/
public function __construct() {
$this->retina_enabled = apply_filters( 'tb_image_resize_retina', tb_global_obj( 'retina' ) );
}
/**
* Run image resizing function
*
* @since 1.0.0
*/
public function process( $args ) {
// Args must be an array
if ( ! is_array( $args ) ) {
print_r( 'Fatal Error: Image resize args are not an array, you must update your template files.' );
return false;
}
// Default args
$defaults = array(
'image' => null,
'width' => '9999',
'height' => '9999',
'crop' => 'center-center',
'retina' => false,
'return' => 'array',
);
// Parse args
$args = wp_parse_args( $args, $defaults );
// Extract args
extract( $args );
// If URL isn't defined return
if ( ! $image ) {
return;
}
// Sanitize inputs
$width = intval( $width );
$height = intval( $height );
// Set width and height to '9999' if empty
$width = $width ? $width : '9999';
$height = $height ? $height : '9999';
// Set crop to center-center if empty
$crop = $crop ? $crop : 'center-center';
// Sanitize crop and add crop suffix
$crop_suffix = '';
$crop = ( $height >= '9999' ) ? false : $crop;
// Define upload path & dir
$upload_info = wp_upload_dir();
$upload_dir = $upload_info[ 'basedir' ];
$upload_url = $upload_info[ 'baseurl' ];
// Define path of image
$rel_path = str_replace( $upload_url, '', $image );
$img_path = $upload_dir . $rel_path;
// Add crop_suffix if $crop isn't false or empty and image resizing is enabled
if ( $crop && tb_get_mod( 'image_resizing', true ) ) {
if ( is_array( $crop ) ) {
$crop_suffix = array_combine( $crop, $crop );
$crop_suffix = implode( '-', $crop_suffix );
} elseif ( 'center-center' != $crop ) {
$crop_suffix = $crop;
$crop = explode( '-', $crop );
}
}
// If image width and height are both 9999 and size is empty return full image
if ( '9999' == $width && '9999' == $height ) {
// Return for retina images
if ( $retina ) {
return;
}
// Set main image to the full URL
$img_url = $image;
// Get width and height
$info = pathinfo( $img_path );
$ext = $info['extension'];
list( $orig_w, $orig_h ) = getimagesize( $img_path );
}
// Image width and height are defined so lets try and crop it
else {
// Set resize dimensions
$resize_width = $width;
$resize_height = $height;
// If $img_url isn't local return full image
if ( strpos( $image, $upload_url ) === false ) {
$img_url = $image;
}
// Image is local, so lets try and crop it
else {
// Check if img path exists, and is an image indeed if not return full img
if ( ! file_exists( $img_path ) OR ! getimagesize( $img_path ) ) {
$img_url = $image;
}
// Lets try and crop things
else {
// 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, $resize_width, $resize_height, $crop );
$dst_w = $dims[4];
$dst_h = $dims[5];
// Can't resize, so return original url
if ( ! $dims ) {
// Set values equal to original image
$img_url = $image;
$dst_w = $orig_w;
$dst_h = $orig_h;
// Return false for retina
if ( $retina ) {
return false;
}
}
// Image can be resized so lets do that
else {
// Define image saving destination
$dst_rel_path = str_replace( '.'. $ext, '', $rel_path );
// Suffix
$suffix = $dst_w .'x'. $dst_h;
// Sanitize suffix
$suffix = $crop_suffix ? $crop_suffix .'-'. $suffix : $suffix;
// Check original image destination
$destfilename = $upload_dir . $dst_rel_path .'-'. $suffix .'.'. $ext;
// Set dimensions for retina images
if ( $retina ) {
// Check if we should actually create a retina version
if ( $dims && file_exists( $destfilename ) && getimagesize( $destfilename ) ) {
// Return if the destination width or height aren't at least 2x as big
if ( ( $orig_w < $dst_w * 2 ) || ( $orig_h < $dst_h * 2 ) ) {
return false;
}
// Set retina version to @2x the output of the default cropped image
$dims = image_resize_dimensions( $orig_w, $orig_h, $dst_w * 2, $dst_h * 2, $crop );
$dst_w = $dims[4];
$dst_h = $dims[5];
// Return if retina version can't be created
if ( ! $dims ) {
return false;
}
// Set correct resize dims for retina images
$resize_width = $resize_width * 2;
$resize_height = $resize_height * 2;
// Tweak suffix
$suffix .= '@2x';
$suffix = $crop_suffix ? $crop_suffix .'-'. $suffix : $suffix;
} else {
return false;
}
}
// The full destination filename for the cropped image
$destfilename = $upload_dir . $dst_rel_path .'-'. $suffix .'.'. $ext;
// Check if cache exists
if ( file_exists( $destfilename ) && getimagesize( $destfilename ) ) {
// Set image url
$img_url = $upload_url . $dst_rel_path .'-'. $suffix .'.'. $ext;
}
// Cached image doesn't exist so resize the image and return the new resized image url
else {
$editor = wp_get_image_editor( $img_path );
// Return full image if there is an error
if ( is_wp_error( $editor ) || is_wp_error( $editor->resize( $resize_width, $resize_height, $crop ) ) ) {
$img_url = $image;
}
// No error so lets go ahead and save it
else {
// Get resized file
$filename = $editor->generate_filename( $suffix );
$editor = $editor->save( $filename );
// Return the resized image URL
if ( ! is_wp_error( $editor ) ) {
$path = str_replace( $upload_dir, '', $editor['path'] );
$img_url = $upload_url . $path;
}
// Return full image if there is an error
else {
$img_url = $image;
}
}
} // End cache check
} // End $dims check
} // End file exists check
} // End local image check
} // End image dims check
// Validate url
$img_url = ! empty( $img_url ) ? $img_url : $image;
// Validate width
if ( ! empty( $dst_w ) ) {
$dst_w = $dst_w;
} elseif( isset( $orig_w ) ) {
$dst_w = $orig_w;
} else {
$dst_w = '';
}
// Validate height
if ( ! empty( $dst_h ) ) {
$dst_h = $dst_h;
} elseif( isset( $orig_h ) ) {
$dst_h = $orig_h;
} else {
$dst_h = '';
}
// Return Image data
if ( 'array' == $return ) {
return array(
'url' => $img_url,
'width' => $dst_w,
'height' => $dst_h
);
} else {
return $img_url;
}
}
}
}
// Helper function for resizing images using the TB_Image_Resize class
if ( ! function_exists( 'tb_image_resize' ) ) {
function tb_image_resize( $args ) {
$class = new TB_Image_Resize;
return $class->process( $args );
}
}