From 39876cf1bf069f1b151d88800054b16a4c4ba6bd Mon Sep 17 00:00:00 2001
From: Christoph Gohlke <cjgohlke@gmail.com>
Date: Fri, 27 Dec 2019 01:28:11 -0800
Subject: [PATCH] Do not use use built-in mapper WIN32 only

---
 src/PIL/ImageFile.py | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/src/PIL/ImageFile.py b/src/PIL/ImageFile.py
index c8d6b6ba3..8e003886c 100644
--- a/src/PIL/ImageFile.py
+++ b/src/PIL/ImageFile.py
@@ -178,24 +178,16 @@ class ImageFile(Image.Image):
                 and args[0] in Image._MAPMODES
             ):
                 try:
-                    if hasattr(Image.core, "map"):
-                        # use built-in mapper  WIN32 only
-                        self.map = Image.core.map(self.filename)
-                        self.map.seek(offset)
-                        self.im = self.map.readimage(
-                            self.mode, self.size, args[1], args[2]
-                        )
-                    else:
-                        # use mmap, if possible
-                        import mmap
+                    # use mmap, if possible
+                    import mmap
 
-                        with open(self.filename, "r") as fp:
-                            self.map = mmap.mmap(
-                                fp.fileno(), 0, access=mmap.ACCESS_READ
-                            )
-                        self.im = Image.core.map_buffer(
-                            self.map, self.size, decoder_name, extents, offset, args
+                    with open(self.filename, "r") as fp:
+                        self.map = mmap.mmap(
+                            fp.fileno(), 0, access=mmap.ACCESS_READ
                         )
+                    self.im = Image.core.map_buffer(
+                        self.map, self.size, decoder_name, extents, offset, args
+                    )
                     readonly = 1
                     # After trashing self.im,
                     # we might need to reload the palette data.