use C++ wrappers around DirectFB API for easier use

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41029 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/dfb/wrapdfb.cpp

@@ -0,0 +1,97 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/dfb/wrapdfb.cpp
+// Purpose:     wx wrappers for DirectFB interfaces
+// Author:      Vaclav Slavik
+// Created:     2006-09-04
+// RCS-ID:      $Id$
+// Copyright:   (c) 2006 REA Elektronik GmbH
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#include "wx/dfb/wrapdfb.h"
+
+//-----------------------------------------------------------------------------
+// wxDfbCheckReturn
+//-----------------------------------------------------------------------------
+
+bool wxDfbCheckReturn(DFBResult code)
+{
+    switch ( code )
+    {
+        case DFB_OK:
+            return true;
+
+        // these are programming errors, assert:
+        #define DFB_ASSERT(code)                                        \
+            case code:                                                  \
+                wxFAIL_MSG( _T("DirectFB error: ") _T(#code) );         \
+                return false                                            \
+
+        DFB_ASSERT(DFB_DEAD);
+        DFB_ASSERT(DFB_UNSUPPORTED);
+        DFB_ASSERT(DFB_UNIMPLEMENTED);
+        DFB_ASSERT(DFB_INVARG);
+        DFB_ASSERT(DFB_NOIMPL);
+        DFB_ASSERT(DFB_MISSINGFONT);
+        DFB_ASSERT(DFB_THIZNULL);
+        DFB_ASSERT(DFB_INVAREA);
+        DFB_ASSERT(DFB_DESTROYED);
+        DFB_ASSERT(DFB_NOSUCHMETHOD);
+        DFB_ASSERT(DFB_NOSUCHINSTANCE);
+        DFB_ASSERT(DFB_VERSIONMISMATCH);
+
+        #undef  DFB_ASSERT
+
+        // these are not errors, but valid return codes:
+        case DFB_INTERRUPTED:
+        case DFB_BUFFEREMPTY:
+            return true;
+
+        default:
+            // FIXME: should handle the errors individually
+            wxLogError(_("DirectFB error %d occured."), (int)code);
+            return false;
+    }
+}
+
+//-----------------------------------------------------------------------------
+// wxDfbPtrBase
+//-----------------------------------------------------------------------------
+
+/* static */
+void wxDfbPtrBase::DoAddRef(wxDfbWrapperBase *ptr)
+{
+    ptr->AddRef();
+}
+
+void wxDfbPtrBase::DoRelease(wxDfbWrapperBase *ptr)
+{
+    ptr->Release();
+}
+
+//-----------------------------------------------------------------------------
+// wxIDirectFB
+//-----------------------------------------------------------------------------
+
+wxIDirectFBPtr wxIDirectFB::ms_ptr;
+
+/* static */
+void wxIDirectFB::CreateDirectFB()
+{
+    IDirectFB *dfb;
+    if ( wxDfbCheckReturn(DirectFBCreate(&dfb)) )
+        ms_ptr = new wxIDirectFB(dfb);
+}
+
+/* static */
+void wxIDirectFB::CleanUp()
+{
+    ms_ptr.Reset();
+}