hide bitmap warning when explicitly picked (#67)

Author: tlambert03

rendercanvas/qt.py

@@ -238,6 +238,9 @@ def __init__(self, *args, present_method=None, **kwargs):
         elif present_method == "screen":
             self._present_to_screen = True
         elif present_method == "bitmap":
+            global _show_image_method_warning
+
+            _show_image_method_warning = None
             self._present_to_screen = False
         else:
             raise ValueError(f"Invalid present_method {present_method}")

rendercanvas/wx.py

@@ -202,6 +202,9 @@ def __init__(self, *args, present_method=None, **kwargs):
         elif present_method == "screen":
             self._present_to_screen = True
         elif present_method == "bitmap":
+            global _show_image_method_warning
+
+            _show_image_method_warning = None
             self._present_to_screen = False
         else:
             raise ValueError(f"Invalid present_method {present_method}")