From d3940a52c6c9c8572fb4dc91686a25e4e8923744 Mon Sep 17 00:00:00 2001
From: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
Date: Sun, 26 Sep 2021 23:38:53 +0200
Subject: [PATCH] Backport PR #21172: skip QImage leak workaround for PySide2
 >= 5.12

---
 lib/matplotlib/backends/backend_qtagg.py   | 5 +++--
 lib/matplotlib/backends/backend_qtcairo.py | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/matplotlib/backends/backend_qtagg.py b/lib/matplotlib/backends/backend_qtagg.py
index 3d96fbda8da5..0ccf32fccd1e 100644
--- a/lib/matplotlib/backends/backend_qtagg.py
+++ b/lib/matplotlib/backends/backend_qtagg.py
@@ -61,7 +61,7 @@ def paintEvent(self, event):
 
             if QT_API == "PyQt6":
                 from PyQt6 import sip
-                ptr = sip.voidptr(buf)
+                ptr = int(sip.voidptr(buf))
             else:
                 ptr = buf
             qimage = QtGui.QImage(
@@ -74,7 +74,8 @@ def paintEvent(self, event):
             # Adjust the buf reference count to work around a memory
             # leak bug in QImage under PySide.
             if QT_API in ('PySide', 'PySide2'):
-                ctypes.c_long.from_address(id(buf)).value = 1
+                if QtCore.__version_info__ < (5, 12):
+                    ctypes.c_long.from_address(id(buf)).value = 1
 
             self._draw_rect_callback(painter)
         finally:
diff --git a/lib/matplotlib/backends/backend_qtcairo.py b/lib/matplotlib/backends/backend_qtcairo.py
index 9619f4fdb686..8d6def2d79e5 100644
--- a/lib/matplotlib/backends/backend_qtcairo.py
+++ b/lib/matplotlib/backends/backend_qtcairo.py
@@ -29,7 +29,7 @@ def paintEvent(self, event):
         buf = self._renderer.gc.ctx.get_target().get_data()
         if QT_API == "PyQt6":
             from PyQt6 import sip
-            ptr = sip.voidptr(buf)
+            ptr = int(sip.voidptr(buf))
         else:
             ptr = buf
         qimage = QtGui.QImage(
@@ -38,7 +38,8 @@ def paintEvent(self, event):
         # Adjust the buf reference count to work around a memory leak bug in
         # QImage under PySide.
         if QT_API in ('PySide', 'PySide2'):
-            ctypes.c_long.from_address(id(buf)).value = 1
+            if QtCore.__version_info__ < (5, 12):
+                ctypes.c_long.from_address(id(buf)).value = 1
         _setDevicePixelRatio(qimage, self.device_pixel_ratio)
         painter = QtGui.QPainter(self)
         painter.eraseRect(event.rect())