added wxGLCanvas::IsDisplaySupported() (patch 1879906)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51526 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/glcanvas.h

@@ -108,6 +108,9 @@ public:
     // accessors
     // ---------
 
+    // check if the given attributes are supported without creating a canvas
+    static bool IsDisplaySupported(const int *attribList);
+
     const wxPalette *GetPalette() const { return &m_palette; }
 
     // miscellaneous helper functions