X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/dc3065a56f1febf3de3b3bbf0904cf8fdc7f7c50..b81e45065986abc34676fecc31515efeb3f3a8d4:/src/common/glcmn.cpp

diff --git a/src/common/glcmn.cpp b/src/common/glcmn.cpp
index ffcb45a603..4f5f9c6025 100644
--- a/src/common/glcmn.cpp
+++ b/src/common/glcmn.cpp
@@ -41,17 +41,28 @@ IMPLEMENT_CLASS(wxGLApp, wxApp)
 // implementation
 // ============================================================================
 
-void wxGLCanvasBase::SetCurrent(const wxGLContext& context) const
+wxGLCanvasBase::wxGLCanvasBase()
+{
+#if WXWIN_COMPATIBILITY_2_8
+    m_glContext = NULL;
+#endif
+
+    // we always paint background entirely ourselves so prevent wx from erasing
+    // it to avoid flicker
+    SetBackgroundStyle(wxBG_STYLE_CUSTOM);
+}
+
+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 wxChar *colour)
+bool wxGLCanvasBase::SetColour(const wxString& colour)
 {
     wxColour col = wxTheColourDatabase->Find(colour);
     if ( !col.Ok() )
@@ -104,5 +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