From b364e2a0729b768aa31c652b77021203fde249c9 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Tue, 11 Feb 2020 01:45:01 +0000
Subject: [PATCH] Media: Improve the preview of transparent images in Image
 widget by using CSS3 to show a checkered background.

Props bahia0019.
Fixes #49237.

git-svn-id: https://develop.svn.wordpress.org/trunk@47257 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/css/widgets.css | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/wp-admin/css/widgets.css b/src/wp-admin/css/widgets.css
index 2f34ae6882..387b357d60 100644
--- a/src/wp-admin/css/widgets.css
+++ b/src/wp-admin/css/widgets.css
@@ -133,6 +133,9 @@
 .media-widget-control .media-widget-preview img {
 	max-width: 100%;
 	vertical-align: middle;
+	background-image: linear-gradient(45deg, #c4c4c4 25%, transparent 25%, transparent 75%, #c4c4c4 75%, #c4c4c4), linear-gradient(45deg, #c4c4c4 25%, transparent 25%, transparent 75%, #c4c4c4 75%, #c4c4c4);
+	background-position: 0 0, 10px 10px;
+	background-size: 20px 20px;
 }
 .media-widget-control .media-widget-preview .wp-video-shortcode {
 	background: #000;