""Walter Wang [MSFT]"" wrote:

> Hi Dave,
>
> I believe it's related to the font created in .NET code doesn't correctly
> fallback to other fonts properly.
>
> I've created a win32 DLL to do the call and it seems working correctly:
>
> // File FontUtil.cpp
> // cl /LD /D "_UNICODE" /D "UNICODE" user32.lib kernel32.lib gdi32.lib
> #define _WIN32_WINNT 0x0500
> #include <windows.h>
> #include <tchar.h>
>
> #define FONTUTIL_EXPORTS
>
> #ifdef FONTUTIL_EXPORTS
> #define FONTUTIL_API __declspec(dllexport)
> #else
> #define FONTUTIL_API __declspec(dllimport)
> #endif
>
> extern "C" {
> FONTUTIL_API BOOL IsFontInstalled(LPCTSTR szFontName);
> FONTUTIL_API BOOL IsCharactersAvailableInFont(LPCTSTR szFontName,
> LPCTSTR characters);
> }
>
>
> static int CALLBACK EnumFontFamProc(CONST ENUMLOGFONT *lpelf,
> CONST NEWTEXTMETRIC *lpntm,
> DWORD FontType,
> LPARAM lParam
> )
> {
> *((BOOL*)lParam) = TRUE;
> return 0;
> }
>
> BOOL IsFontInstalled(LPCTSTR szFontName)
> {
> BOOL bIsInstalled = FALSE;
> HDC hDC = GetDC(NULL);
> EnumFontFamilies(hDC, szFontName, (FONTENUMPROC) EnumFontFamProc, (LPARAM)
> &bIsInstalled);
> ReleaseDC(NULL, hDC);
> return bIsInstalled;
> }
>
> BOOL IsCharactersAvailableInFont(LPCTSTR szFontName, LPCTSTR characters)
> {
> HDC hdc;
> HFONT hFontOld;
> HFONT hFontNew;
> BOOL bResult = TRUE;
>
> hFontNew = CreateFont(0, 0, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE,
> DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
> DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE,
> szFontName);
> if (hFontNew == NULL) return FALSE;
>
> hdc = GetDC(NULL);
> hFontOld = (HFONT) SelectObject(hdc, hFontNew);
>
> int count = _tcslen(characters);
> WORD* indices = new WORD[count];
> DWORD dwRet = GetGlyphIndices(hdc, characters, count, &indices[0],
> GGI_MARK_NONEXISTING_GLYPHS);
> if (dwRet == GDI_ERROR) {
> bResult = FALSE;
> } else {
> for (int i = 0; i < count; i++) {
> if (indices[i] == 0xffff) {
> bResult = FALSE;
> break;
> }
> }
> }
>
> SelectObject(hdc, hFontOld);
> DeleteObject(hFontNew);
> ReleaseDC(NULL, hdc);
>
> return bResult;
> }
>
>
> Save above code as "FontUtil.cpp", open a VS2005 environment command
> prompt, run command:
>
> cl /LD /D "_UNICODE" /D "UNICODE" FontUtil.cpp user32.lib kernel32.lib
> gdi32.lib
>
> This will generate FontUtil.dll.
>
>
> In your .NET, use following code to check if a CultureInfo.NativeName can
> be displayed in Font "MS Shell Dlg", which is a virtual font name when you
> use default font in WinForm:
>
> [DllImport(@"FontUtil.dll", CharSet=CharSet.Unicode)]
> static extern bool IsCharactersAvailableInFont(string fontName, string
> text);
>
> [DllImport(@"FontUtil.dll", CharSet = CharSet.Unicode)]
> static extern bool IsFontInstalled(string fontName);
>
> static void Main(string[] args)
> {
> Console.WriteLine(IsFontInstalled("Berlin Sans FB Demi"));
> foreach (CultureInfo ci in
> CultureInfo.GetCultures(CultureTypes.AllCultures))
> {
> if (!IsCharactersAvailableInFont("MS Shell Dlg", ci.NativeName))
> {
> Console.WriteLine(ci.Name);
> }
> }
> }
>
>
> Regards,
> Walter Wang (wawang@online.microsoft.com, remove 'online.')
> Microsoft Online Community Support
>
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