https://github.com/pygobject/pycairo/pull/366

From 387e27fa36d29bc8f656656ca8b47e7b4996f4f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
Date: Wed, 29 May 2024 21:25:41 +0200
Subject: [PATCH] Avoid invalid PyBUF_READ flag in PyObject_GetBuffer()

Since Python 3.13, the flag is no longer allowed.

See https://github.com/python/cpython/pull/114707

Fixes https://github.com/pygobject/pycairo/issues/365
---
 cairo/surface.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cairo/surface.c b/cairo/surface.c
index 048522c6..f00db8b5 100644
--- a/cairo/surface.c
+++ b/cairo/surface.c
@@ -484,7 +484,7 @@ surface_set_mime_data (PycairoSurface *o, PyObject *args) {
     return NULL;
   }
 
-  res = PyObject_GetBuffer (obj, view, PyBUF_READ);
+  res = PyObject_GetBuffer (obj, view, PyBUF_SIMPLE);
   if (res == -1) {
       PyMem_Free (view);
       return NULL;