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Dir : //home/trave494/islandpc.ca/wp-content/plugins/backupbuddy/pluginbuddy/_image_downsize.php

<?php
// NOTE: No namespace for the imade downsizing functionality.

/*	Image Downsizer - Iteration 20 - 3/24/11
 *
 *	Handles resizing image thumbnails on demand to the requested custom image size.
 *
 *	Originally written by Chris Jean. Modified by Dustin Bolton
 *	
 */
if ( !function_exists( 'ithemes_filter_image_downsize' ) ) {
	add_filter( 'image_downsize', 'ithemes_filter_image_downsize', 10, 3 ); // Latch in when a custom image size is called.
	add_filter( 'intermediate_image_sizes_advanced', 'ithemes_filter_image_downsize_blockextra', 10, 3 ); // Custom image size blocker to block generation of thumbs for sizes other sizes except when called.
	function ithemes_filter_image_downsize( $result, $id, $size ) {
		global $_ithemes_temp_downsize_size;
		if ( is_array( $size ) ) { // Dont bother with non-named sizes. Let them proceed normally. We need to set something to block the blocker though.
			$_ithemes_temp_downsize_size = 'array_size';
			return;
		}
		
		// Store current meta information and size data.
		global $_ithemes_temp_downsize_meta;
		$_ithemes_temp_downsize_size = $size;
		$_ithemes_temp_downsize_meta = wp_get_attachment_metadata( $id );
		
		if ( !is_array( $_ithemes_temp_downsize_meta ) ) { return $result; }
		if ( !is_array( $size ) && !empty( $_ithemes_temp_downsize_meta['sizes'][$size] ) ) {
			$data = $_ithemes_temp_downsize_meta['sizes'][$size];
			// Some handling if the size defined for this size name has changed.
			global $_wp_additional_image_sizes;
			if ( empty( $_wp_additional_image_sizes[$size] ) ) { // Not a custom size so return data as is.
				$img_url = wp_get_attachment_url( $id );
				$img_url = path_join( dirname( $img_url ), $data['file'] );
				return array( $img_url, $data['width'], $data['height'], true );
			} else { // Custom size so only return if current image file dimensions match the defined ones.
				$img_url = wp_get_attachment_url( $id );
				$img_url = path_join( dirname( $img_url ), $data['file'] );
				return array( $img_url, $data['width'], $data['height'], true );
			}
		}
		
		require_once( ABSPATH . '/wp-admin/includes/image.php' );
		$uploads = wp_upload_dir();
		if ( !is_array( $uploads ) || ( false !== $uploads['error'] ) ) { return $result; }
		$file_path = "{$uploads['basedir']}/{$_ithemes_temp_downsize_meta['file']}";
		
		// Image is resized within the function in the following line.
		$temp_meta_information = wp_generate_attachment_metadata( $id, $file_path ); // triggers filter_image_downsize_blockextra() function via filter within. generate images. returns new meta data for image (only includes the just-generated image size).
		
		$meta_information = $_ithemes_temp_downsize_meta; // Get the old original meta information.
		
		if ( !empty( $temp_meta_information['sizes'][$_ithemes_temp_downsize_size] ) ) { // This named size returned size dimensions in the size array key so copy it.
			$meta_information['sizes'][$_ithemes_temp_downsize_size] = $temp_meta_information['sizes'][$_ithemes_temp_downsize_size]; // Merge old meta back in.
			wp_update_attachment_metadata( $id, $meta_information ); // Update image meta data.
		}
		
		unset( $_ithemes_temp_downsize_size ); // Cleanup.
		unset( $_ithemes_temp_downsize_meta );
		
		return $result;
	}
	/* Prevents image resizer from resizing ALL images; just the currently requested size. */
	function ithemes_filter_image_downsize_blockextra( $sizes ) {
		//return $sizes;
		global $_ithemes_temp_downsize_size;
		if ( empty( $_ithemes_temp_downsize_size ) || ( $_ithemes_temp_downsize_size == 'array_size' ) ) { // Dont bother with non-named sizes. Let them proceed normally.
			return $sizes;
		}
		if ( !empty( $sizes[$_ithemes_temp_downsize_size] ) ) { // unavailable size so don't set.
			$sizes = array( $_ithemes_temp_downsize_size => $sizes[$_ithemes_temp_downsize_size] ); // Strip out all extra meta data so only the requested size will be generated.
		}
		return $sizes;
	}
}
?>