diff -u -r vcl.old/inc/vcl/outdev.h vcl/inc/vcl/outdev.h
--- vcl.old/inc/vcl/outdev.h	2009-06-12 10:10:41.000000000 +0800
+++ vcl/inc/vcl/outdev.h	2009-06-12 10:10:00.000000000 +0800
@@ -91,6 +91,7 @@
 
 private:
 friend class ImplDevFontList; // TODO: remove soon
+	friend class WinGlyphFallbackSubstititution; //access mpFirst
     ImplFontData*       mpFirst;            // linked list of physical font faces
     String              maName;             // Fontname (original font family name)
     String              maSearchName;       // normalized font family name
diff -u -r vcl.old/win/inc/salgdi.h vcl/win/inc/salgdi.h
--- vcl.old/win/inc/salgdi.h	2009-06-12 10:10:44.000000000 +0800
+++ vcl/win/inc/salgdi.h	2009-06-12 10:10:03.000000000 +0800
@@ -81,6 +81,7 @@
     bool                    SupportsArabic() const      { return mbHasArabicSupport; }
     bool                    AliasSymbolsHigh() const    { return mbAliasSymbolsHigh; }
     bool                    AliasSymbolsLow() const     { return mbAliasSymbolsLow; }
+    void                    ReadCmapTable( HDC ) const;
 
     ImplFontCharMap*        GetImplFontCharMap() const;
     const Ucs2SIntMap* GetEncodingVector() const { return mpEncodingVector; }
@@ -109,7 +110,6 @@
     bool                    mbAliasSymbolsHigh;
     bool                    mbAliasSymbolsLow;
 private:
-    void                    ReadCmapTable( HDC ) const;
     void                    ReadOs2Table( HDC ) const;
 
 #ifdef GNG_VERT_HACK
diff -u -r vcl.old/win/source/gdi/salgdi3.cxx vcl/win/source/gdi/salgdi3.cxx
--- vcl.old/win/source/gdi/salgdi3.cxx	2009-06-12 10:10:44.000000000 +0800
+++ vcl/win/source/gdi/salgdi3.cxx	2009-06-12 10:10:03.000000000 +0800
@@ -53,6 +53,10 @@
 #include <vcl/outfont.hxx>
 #include <vcl/font.hxx>
 #include <vcl/sallayout.hxx>
+
+//enable ImplPreMatchFontSubstitution and ImplGlyphFallbackFontSubstitution declaration. 
+#include <vcl/outdev.h>
+
 #include <tools/poly.hxx>
 #include <basegfx/polygon/b2dpolygon.hxx>
 #include <basegfx/polygon/b2dpolypolygon.hxx>
@@ -311,6 +315,102 @@
 	}
 }
 
+
+// ===========================================================================
+// platform specific font substitution hooks
+//glyph fallback enhancement
+
+class ImplWinFontData;
+void ImplGetLogFontFromFontSelect( HDC hDC,
+                                   const ImplFontSelectData* pFont,
+                                   LOGFONTW& rLogFont,
+                                   bool /*bTestVerticalAvail*/ );
+
+class WinPreMatchSubstititution
+:   public ImplPreMatchFontSubstitution
+{
+public:
+    bool FindFontSubstitute( ImplFontSelectData& ) const;
+};
+
+class WinGlyphFallbackSubstititution
+:    public ImplGlyphFallbackFontSubstitution
+{
+    // TODO: add a cache
+	HDC mhDC;
+	ImplDevFontList* mpFontList;
+public:
+	WinGlyphFallbackSubstititution(HDC hdc, ImplDevFontList* pFontList) {
+		mhDC = hdc;
+		mpFontList = pFontList;
+	}
+
+	void SetHDC(HDC hdc) {mhDC = hdc;}
+	void SetFontList(ImplDevFontList* pFontList) { mpFontList = pFontList; }
+	bool FindFontSubstitute( ImplFontSelectData&, rtl::OUString& rMissingCodes ) const;
+};
+
+bool WinPreMatchSubstititution::FindFontSubstitute(ImplFontSelectData& rFontSelData) const{
+	return true;
+}
+
+//get fallback font for missing character
+bool WinGlyphFallbackSubstititution::FindFontSubstitute(ImplFontSelectData& rFontSelData, rtl::OUString& rMissingCodes) const{
+	ImplDevFontList::DevFontList::const_iterator it = mpFontList->maDevFontList.begin();
+
+	//traverse font list and determine if certain font contain the missing characters
+	for(; it != mpFontList->maDevFontList.end(); ++it ) {
+		const ImplDevFontListData* pDevFontListData = (*it).second;
+		for( ImplFontData* pFontFace = pDevFontListData->mpFirst; pFontFace; pFontFace = pFontFace->GetNextFace() ) {
+			const ImplWinFontData* pWinFontData = static_cast<const ImplWinFontData*>(pFontFace);
+			//if CMAP is not available, get it
+			if(!pWinFontData->GetImplFontCharMap()) {
+				//construct a Size structure as the parameter of constructor of class ImplFontSelectData
+				const Size aSize(pFontFace->GetWidth(), pFontFace->GetHeight());
+				//new a ImplFontSelectData object for creating LOGFONT
+				const ImplFontSelectData* pFontSelectData = new ImplFontSelectData(*pFontFace, aSize, 16, 0, false);
+				//construct log font
+				LOGFONTW aLogFont;
+				ImplGetLogFontFromFontSelect( mhDC, pFontSelectData, aLogFont, true );
+
+				HFONT hNewFont = 0, hOldFont = 0;
+				//create HFONT from log font
+				hNewFont = ::CreateFontIndirectW( &aLogFont );
+				//select the new font into device 
+				hOldFont = ::SelectFont( mhDC, hNewFont );
+
+				// read CMAP table
+				pWinFontData->ReadCmapTable( mhDC );;
+
+				::SelectFont( mhDC, hOldFont );
+				::DeleteFont( hNewFont );
+				delete pFontSelectData;
+			}
+			sal_UCS4 cChar = 0;
+			sal_Int32 nStrIndex = 0;
+			sal_Int32 nStrlength = rMissingCodes.getLength();
+			bool ismatch = true; 
+
+			//look if the fontface contain the missing characters
+			while( nStrIndex < nStrlength) {
+				cChar = rMissingCodes.iterateCodePoints( &nStrIndex );
+				if(!(pWinFontData->HasChar(cChar))) {
+					ismatch = false;
+					break;
+				}
+			}
+
+			//if the fontface meet the missing characters, set the rFontSelData's maSearchName with pFontData->maName
+			//and return true
+			if(ismatch) {
+				rFontSelData.maSearchName = pFontFace->maName;
+				return true;
+			}
+		}
+	}
+	return false;
+}
+
 // =======================================================================
 
 struct ImplEnumInfo
@@ -903,6 +1003,8 @@
 
 ImplFontCharMap* ImplWinFontData::GetImplFontCharMap() const
 {
+	if(!mpUnicodeMap)
+		return 0;
     mpUnicodeMap->AddReference();
     return mpUnicodeMap;
 }
@@ -2243,6 +2345,11 @@
         bImplSalCourierScalable = aInfo.mbImplSalCourierScalable;
         bImplSalCourierNew      = aInfo.mbImplSalCourierNew;
     }
+
+	//set font fallback hook
+	static WinGlyphFallbackSubstititution aSubstFallback(mhDC, pFontList);
+	//aSubstFallback.SetHDC(mhDC);
+	pFontList->SetFallbackHook( &aSubstFallback );
 }
 
 // ----------------------------------------------------------------------------