From 6609c2590cbca5f36d9b3471d3547a6464473ce1 Mon Sep 17 00:00:00 2001
From: Jon Dufresne <jon.dufresne@gmail.com>
Date: Sat, 25 May 2019 12:26:27 -0700
Subject: [PATCH] Remove unnecessary repetitive .upper()/.lower() calls

Plugins are always registered with th ID all uppercase and the extension
all lowercase. These .upper()/.lower() calls amount to a noop.
---
 src/PIL/Image.py           | 9 ++++-----
 src/PIL/PalmImagePlugin.py | 6 +++---
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 2ee7869b6..c0ca51585 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -2816,7 +2816,6 @@ def register_open(id, factory, accept=None):
     :param accept: An optional function that can be used to quickly
        reject images having another format.
     """
-    id = id.upper()
     ID.append(id)
     OPEN[id] = factory, accept
 
@@ -2829,7 +2828,7 @@ def register_mime(id, mimetype):
     :param id: An image format identifier.
     :param mimetype: The image MIME type for this format.
     """
-    MIME[id.upper()] = mimetype
+    MIME[id] = mimetype
 
 
 def register_save(id, driver):
@@ -2840,7 +2839,7 @@ def register_save(id, driver):
     :param id: An image format identifier.
     :param driver: A function to save images in this format.
     """
-    SAVE[id.upper()] = driver
+    SAVE[id] = driver
 
 
 def register_save_all(id, driver):
@@ -2852,7 +2851,7 @@ def register_save_all(id, driver):
     :param id: An image format identifier.
     :param driver: A function to save images in this format.
     """
-    SAVE_ALL[id.upper()] = driver
+    SAVE_ALL[id] = driver
 
 
 def register_extension(id, extension):
@@ -2863,7 +2862,7 @@ def register_extension(id, extension):
     :param id: An image format identifier.
     :param extension: An extension used for this format.
     """
-    EXTENSION[extension.lower()] = id.upper()
+    EXTENSION[extension] = id
 
 
 def register_extensions(id, extensions):
diff --git a/src/PIL/PalmImagePlugin.py b/src/PIL/PalmImagePlugin.py
index 16b9059df..86e4dc7ec 100644
--- a/src/PIL/PalmImagePlugin.py
+++ b/src/PIL/PalmImagePlugin.py
@@ -226,8 +226,8 @@ def _save(im, fp, filename):
 #
 # --------------------------------------------------------------------
 
-Image.register_save("Palm", _save)
+Image.register_save("PALM", _save)
 
-Image.register_extension("Palm", ".palm")
+Image.register_extension("PALM", ".palm")
 
-Image.register_mime("Palm", "image/palm")
+Image.register_mime("PALM", "image/palm")