hi Herbert, 2009/5/5 Herbert Duerr <du...@sun.com>
> hi Yanmin, > > On May 5, 2009, at 9:33 AM, yanmin wrote: > >> 2009/5/5 Herbert Duerr <du...@sun.com> >> On May 5, 2009, at 7:42 AM, yanmin wrote: >> In order to enable glyph fallback under Windows platform, a class >> WinGlyphFallbackSubstitution inherited ImplGlyphFallbackFontSubstitution >> is >> created as the class FcGlyphFallbackSubstitution under Linux system. >> >> That's interesting. Is there already a CWS for this? >> >> No CWS, I filed a issue just now. The issue number is 101552. >> > > Thanks! > > [...] >> >> Unfortunately, *pData->HasChar(c)* always returns false even >> *pData*contains the character *c*. >> >> How do you know that pData contains c? If it returns false this is a >> strong indication that it isn't there. >> >> For a Chinese character, I really know such as SimSong contains it. >> > > EnumFontFamilyEx iterates over all faces of a font. Do all faces of SimSong > contain this character? Do the corresponding unicode cmaps in the font files > confirm this? During my debuging, HasChar always returns false for each face of SimSong. But in function SimpleWinLayout::LayoutText, mrWinFontData.HasChar(nCharCode) really returns true for the same circumstance. That is pretty confusing. > > > I don't know what's the problem. In addition, any idea to enable glyph >> fallback under windows platform would be also highly appreciated just as >> done under Linux system leveraging fontconfig lib. >> >> >> That's also quite interesting. Which Windows versions have fontconfig >> nowadays? Who maintains the configuration data? >> >> Maybe you misunderstand what I said. I mean that fontconfig was used to >> improve glyph fallback just under linux system. A similar way could be >> considered under windows system, certainly there is no fongconfig available >> under window. >> > > I see, thanks for the explanation! I'm now using the simplest way to implement a demo to just prove dynamic glyph fallback workable under windows system. Enumerate all the fonts that windows has, if a font contains the missing character, then it would be the glyph fallback font, certainly not the best one.[?] > > > --- > Herbert Duerr > du...@sun.com > Many thanks. Yanmin Jia
