From 3d923b1216b36e697ab25f45f0e5430e9909e28c Mon Sep 17 00:00:00 2001
From: Valeri <v19930312@gmail.com>
Date: Sun, 19 Feb 2023 07:53:12 +0300
Subject: [PATCH] Invert result of glXSwapIntervalSGI

Unlike `wglSwapIntervalEXT`, it returns zero on success and non-zero on error
---
 source/examples/cubescape-qt/Canvas.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/examples/cubescape-qt/Canvas.cpp b/source/examples/cubescape-qt/Canvas.cpp
index bd0c85258..fcb47b91d 100644
--- a/source/examples/cubescape-qt/Canvas.cpp
+++ b/source/examples/cubescape-qt/Canvas.cpp
@@ -207,7 +207,7 @@ void Canvas::setSwapInterval(SwapInterval swapInterval)
     if (!glXSwapIntervalSGI)
         glXSwapIntervalSGI = reinterpret_cast<SWAPINTERVALEXTPROC>(m_context->getProcAddress("glXSwapIntervalSGI"));
     if (glXSwapIntervalSGI)
-        result = glXSwapIntervalSGI(swapInterval);
+        result = !glXSwapIntervalSGI(swapInterval);
 
 #endif