From fbea58a1b7d8bb5f515d71f1eb0fe4d77d5af335 Mon Sep 17 00:00:00 2001
From: nacin <nacin@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Wed, 2 May 2012 20:15:44 +0000
Subject: [PATCH] Add filter to image_resize_dimensions() so plugins can
 perform this calculation on their own. props ebababi. fixes #15989.

git-svn-id: http://core.svn.wordpress.org/trunk@20694 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/media.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/wp-includes/media.php b/wp-includes/media.php
index 55c2fbd3e0..63cdfbda8d 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -327,6 +327,8 @@ function wp_constrain_dimensions( $current_width, $current_height, $max_width=0,
  * portion of the image will be cropped out and resized to the required size.
  *
  * @since 2.5.0
+ * @uses apply_filters() Calls 'image_resize_dimensions' on $orig_w, $orig_h, $dest_w, $dest_h and
+ *		$crop to provide custom resize dimensions.
  *
  * @param int $orig_w Original width.
  * @param int $orig_h Original height.
@@ -343,6 +345,11 @@ function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = fal
 	if ($dest_w <= 0 && $dest_h <= 0)
 		return false;
 
+	// plugins can use this to provide custom resize dimensions
+	$output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop );
+	if ( null !== $output )
+		return $output;
+
 	if ( $crop ) {
 		// crop the largest possible portion of the original image that we can size to $dest_w x $dest_h
 		$aspect_ratio = $orig_w / $orig_h;