From 43e0b9d23704f61abead476208b9f8b057a60fb7 Mon Sep 17 00:00:00 2001
From: Karl Hobley <karlhobley10@gmail.com>
Date: Wed, 13 Apr 2016 00:04:51 +0100
Subject: [PATCH] Added "original_format" into initial environment

---
 wagtail/wagtailimages/models.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wagtail/wagtailimages/models.py b/wagtail/wagtailimages/models.py
index 3c4c50572..4f0751ff2 100644
--- a/wagtail/wagtailimages/models.py
+++ b/wagtail/wagtailimages/models.py
@@ -413,7 +413,9 @@ class Filter(models.Model):
             # Fix orientation of image
             willow = willow.auto_orient()
 
-            env = {}
+            env = {
+                'original-format': original_format,
+            }
             for operation in self.operations:
                 # Check that the operation can take the new "env" argument
                 # (added in Wagtail 1.5)