extended display mode handling to accept WXMODE env. variable

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13230 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mgl/app.cpp

@@ -220,6 +220,20 @@ wxApp::~wxApp()
 {
 }
 
+wxDisplayModeInfo wxGetDefaultDisplayMode()
+{
+    wxString mode;
+    unsigned w, h, bpp;
+
+    if ( !wxGetEnv(wxT("WXMODE"), &mode) || 
+         (wxSscanf(mode.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3) )
+    {
+        w = 640, h = 480, bpp = 16;
+    }
+
+    return wxDisplayModeInfo(w, h, bpp);
+}
+
 bool wxApp::SetDisplayMode(const wxDisplayModeInfo& mode)
 {
     if ( !mode.IsOk() )