X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/35f1f4f7ea3c88fa680ba69de487f67967ac51d1..12b5f4b4d2d8a07962da7ba3b78c8c1ec2634a67:/src/common/glcmn.cpp

diff --git a/src/common/glcmn.cpp b/src/common/glcmn.cpp
index 0d85eab14c..4f5f9c6025 100644
--- a/src/common/glcmn.cpp
+++ b/src/common/glcmn.cpp
@@ -52,14 +52,14 @@ wxGLCanvasBase::wxGLCanvasBase()
     SetBackgroundStyle(wxBG_STYLE_CUSTOM);
 }
 
-void wxGLCanvasBase::SetCurrent(const wxGLContext& context) const
+bool wxGLCanvasBase::SetCurrent(const wxGLContext& context) const
 {
     // although on MSW it works even if the window is still hidden, it doesn't
     // work in other ports (notably X11-based ones) and documentation mentions
     // that SetCurrent() can only be called for a shown window, so check for it
     wxASSERT_MSG( IsShownOnScreen(), _T("can't make hidden GL canvas current") );
 
-    context.SetCurrent(*wx_static_cast(const wxGLCanvas *, this));
+    return context.SetCurrent(*static_cast<const wxGLCanvas *>(this));
 }
 
 bool wxGLCanvasBase::SetColour(const wxString& colour)
@@ -115,5 +115,32 @@ void wxGLCanvasBase::OnSize(wxSizeEvent& WXUNUSED(event))
 
 #endif // WXWIN_COMPATIBILITY_2_8
 
+/* static */
+bool wxGLCanvasBase::IsExtensionInList(const char *list, const char *extension)
+{
+    if ( !list )
+        return false;
+
+    for ( const char *p = list; *p; p++ )
+    {
+        // advance up to the next possible match
+        p = wxStrstr(p, extension);
+        if ( !p )
+            break;
+
+        // check that the extension appears at the beginning/ending of the list
+        // or is preceded/followed by a space to avoid mistakenly finding
+        // "glExtension" in a list containing some "glFunkyglExtension"
+        if ( (p == list || p[-1] == ' ') )
+        {
+            char c = p[strlen(extension)];
+            if ( c == '\0' || c == ' ' )
+                return true;
+        }
+    }
+
+    return false;
+}
+
 #endif // wxUSE_GLCANVAS