forked from roborourke/wp-instagraph
/
wp-instagraph.php
148 lines (113 loc) · 4.26 KB
/
wp-instagraph.php
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<?php
/*
Plugin Name: Instagraph
Plugin URI:
Description: Use Instagram style filters on your thumbnails
Author: Robert O'Rourke, Richard Tape
Version: 0.1
Author URI:
*/
// get class library
require_once( 'includes/instagraph.php' );
class WP_Instagraph extends Instagraph {
var $filter;
var $filters = array( 'lomo', 'nashville', 'kelvin', 'toaster', 'gotham', 'tilt_shift' );
function __construct( $image = false, $output = false ) {
// set up filters for this instance
$this->filters = apply_filters( 'instagraph_filters', $this->filters );
// set the parent class up
if ( $image && $output )
parent::__construct( $image, $output );
}
function downsize( $out, $id, $size ) {
$img_url = wp_get_attachment_url( $id );
$img_path = get_attached_file( $id );
$meta = wp_get_attachment_metadata( $id );
$width = $height = 0;
$is_intermediate = false;
$img_url_basename = wp_basename( $img_url );
$img_path_basename = wp_basename( $img_path );
// extract filter from size request
if ( ! is_string( $size ) )
return $out;
$size_bits = explode( ':', $size );
$filter = isset( $size_bits[ 1 ] ) ? $size_bits[ 1 ] : false;
$size = isset( $size_bits[ 0 ] ) ? $size_bits[ 0 ] : false;
// start the reactor
if ( $filter ) {
// try for a new style intermediate size
if ( $intermediate = image_get_intermediate_size($id, $size) ) {
$img_url = str_replace($img_url_basename, $intermediate['file'], $img_url);
$img_path = str_replace($img_path_basename, $intermediate['file'], $img_path);
$width = $intermediate['width'];
$height = $intermediate['height'];
$is_intermediate = true;
}
elseif ( $size == 'thumbnail' ) {
// fall back to the old thumbnail
if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) {
$img_url = str_replace($img_url_basename, wp_basename($thumb_file), $img_url);
$img_path = str_replace($img_path_basename, wp_basename($thumb_file), $img_path);
$width = $info[0];
$height = $info[1];
$is_intermediate = true;
}
}
if ( !$width && !$height && isset($meta['width'], $meta['height']) ) {
// any other type: use the real image
$width = $meta['width'];
$height = $meta['height'];
}
if ( $img_url && $img_path ) {
$input = $img_path;
$output = $this->filtered_url( $input, $filter );
// generate filtered thumb
if ( ! file_exists( $output ) )
$this->filter( $filter, $input, $output );
// point to our new file
$img_url = $this->filtered_url( $img_url, $filter );
// we have the actual image size, but might need to further constrain it if content_width is narrower
list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
return array( $img_url, $width, $height, $is_intermediate );
}
// don't continue the downsize funtion
return true;
}
return $out;
}
function filtered_url( $url, $filter ) {
return preg_replace( "/(\.[^\.]+)$/", ".{$filter}$1", $url );
}
// run the image filter
function filter( $filter = 'nashville', $input, $output ) {
try {
$instagraph = new WP_Instagraph( $input, $output );
if( ! in_array( $filter, apply_filters( 'instagraph_filters', $instagraph->filters ) ) )
$filter = 'nashville'; // if method not in array, default it
$instagraph->$filter(); // name of the filter from class
}
catch (Exception $e) {
wp_die( $e->getMessage(), __( 'Instagraph plugin error' ) );
}
}
// allow addition of custom filters
function __call( $method, $args ) {
do_action( "instagraph_custom_$method", $this );
}
}
// big daddy filter that all image requests go through, run it after everything else though
$wp_instagraph = new WP_Instagraph();
add_filter( 'image_downsize', array( $wp_instagraph, 'downsize' ), 100000000, 3 );
/**
* Add new filters to instagraph
*
* @param String $filter A name for the filter
* @param Function $callback A callback function that gets passed the instagraph object as its parameter
*
* @return null
*/
function register_instagraph_filter( $filter, $callback ) {
add_filter( "instagraph_filters", create_function( '$filters', 'return array_unique( array_merge( $filters, array( "' . $filter . '" ) ) );' ) );
add_action( "instagraph_custom_$filter", $callback, 10, 2 );
}
?>