CLSID BitmapUtil::FindCodecForExtension( LPCTSTR pszExtension, const Gdiplus::ImageCodecInfo* pCodecs, UINT nCodecs )
{
CT2CW pszExtensionW( pszExtension );
for( UINT iCodec = 0; iCodec < nCodecs; iCodec++ )
{
CStringW strExtensions( pCodecs[iCodec].FilenameExtension );
int iStart = 0;
do
{
CStringW strExtension = ::PathFindExtensionW( strExtensions.Tokenize( L";", iStart ) );
if( iStart != -1 )
{
if( strExtension.CompareNoCase( pszExtensionW ) == 0 )
{
return( pCodecs[iCodec].Clsid );
}
}
} while( iStart != -1 );
}
return( CLSID_NULL );
}
// Check if file name has a supported image type extension.
bool CMyStatic::IsSupportedFileExtension(LPCTSTR lpszFileName) const
{
bool bIsSupportedFileExtension = false;
LPCTSTR lpszExt = ::PathFindExtension(lpszFileName);
if (_T('.') == *lpszExt)
{
#if 1
++lpszExt;
static LPCTSTR lpszExtensions[] = {
_T("bmp"), _T("dib"), _T("rle"),
_T("jpg"), _T("jpeg"), _T("jpe"), _T("jfif"),
_T("gif"),
_T("tif"), _T("tiff"),
_T("png"),
_T("ico")
};
int i = 0;
while (!bIsSupportedFileExtension && lpszExtensions[i])
{
if (0 == _tcsicmp(lpszExt, lpszExtensions[i]))
bIsSupportedFileExtension = true;
++i;
}
#else
// Check file name extension against those of supported GDI+ codecs.
// Based on code form atlimage.h.
// Note that this check does not include .ico files which are supported for loading.
ULONG_PTR gdiplusToken;
Gdiplus::GdiplusStartupInput input;
if (Gdiplus::Ok == Gdiplus::GdiplusStartup(&gdiplusToken, &input, NULL))
{
UINT nEncoders;
UINT nBytes;
if (Gdiplus::Ok == Gdiplus::GetImageEncodersSize(&nEncoders, &nBytes))
{
LPBYTE pBuf = new BYTE[nBytes];
Gdiplus::ImageCodecInfo* pEncoders = reinterpret_cast<Gdiplus::ImageCodecInfo*>(pBuf);
if (Gdiplus::Ok == Gdiplus::GetImageEncoders(nEncoders, nBytes, pEncoders))
{
CStringW strExtW(lpszExt);
for (UINT iCodec = 0; iCodec < nEncoders && !bIsSupportedFileExtension; iCodec++)
{
CStringW strExtensions(pEncoders[iCodec].FilenameExtension);
int iStart = 0;
do
{
CStringW strExtension = ::PathFindExtensionW(strExtensions.Tokenize(L";", iStart));
if (iStart != -1 &&
0 == strExtension.CompareNoCase(strExtW.GetString()))
{
bIsSupportedFileExtension = true;
}
} while (iStart != -1 && !bIsSupportedFileExtension);
}
}
delete [] pBuf;
}
Gdiplus::GdiplusShutdown(gdiplusToken);
}
#endif
}
return bIsSupportedFileExtension;
}
