From eff667a8614ba3b567684597795924387c8cbaaa Mon Sep 17 00:00:00 2001
From: wiredfool <eric-github@soroos.net>
Date: Fri, 23 May 2025 10:22:59 +0100
Subject: [PATCH] Mark the image read-only in the C layer if it's created from
 a read only buffer

---
 src/map.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/map.c b/src/map.c
index c66702981..9a3144ab9 100644
--- a/src/map.c
+++ b/src/map.c
@@ -137,6 +137,7 @@ PyImaging_MapBuffer(PyObject *self, PyObject *args) {
         }
     }
 
+    im->read_only = view.readonly;
     im->destroy = mapping_destroy_buffer;
 
     Py_INCREF(target);