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Add guards when checking vsync

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This commit is contained in:
Zach Pomerantz 2016-03-24 15:14:00 -07:00
parent a34e6773a9
commit 1405daa4ee
1 changed files with 3 additions and 1 deletions
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4
libraries/gl/src/gl/GLWidget.cpp
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@ -50,7 +50,9 @@ void GLWidget::initializeGL() {
// TODO: write the proper code for linux
makeCurrent();
#if defined(Q_OS_WIN)
_vsyncSupported = context()->contextHandle()->hasExtension("WGL_EXT_swap_control");;
if (isValid() && context() && context()->contextHandle()) {
_vsyncSupported = context()->contextHandle()->hasExtension("WGL_EXT_swap_control");;
}
#endif
}