skip QImage leak workaround for PySide2 >= 5.12

pijyoi · pijyoi · commit f003901f4f9f · 2021-09-25T10:39:11.000+08:00
the leak was addressed in PYSIDE-140
diff --git 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
@@ -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())
