From ae11372614a01b73f40e7c9b8abd82259ad2cf1f Mon Sep 17 00:00:00 2001
From: Scott Talbert <swt@techie.net>
Date: Sat, 25 Jan 2020 12:46:23 -0500
Subject: [PATCH] Fix GLCanvas demo when using HiDPI display

OpenGL operates using physical pixels, so we need to factor in the scale
factor when setting the GL viewport.
---
 demo/GLCanvas.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/demo/GLCanvas.py b/demo/GLCanvas.py
index 87a217a6..7ea4d9e1 100644
--- a/demo/GLCanvas.py
+++ b/demo/GLCanvas.py
@@ -102,7 +102,7 @@ class MyCanvasBase(glcanvas.GLCanvas):
 
 
     def DoSetViewport(self):
-        size = self.size = self.GetClientSize()
+        size = self.size = self.GetClientSize() * self.GetContentScaleFactor()
         self.SetCurrent(self.context)
         glViewport(0, 0, size.width, size.height)