Hi Michael, I have just done a review of all the changes, and rather than overwhelmed by the extent of the changes. While I'm impressed at how thorough you've been - it's clearly taken quite a bit of work, I am rather concerned about the nature of the changes and in particular the ongoing readability and maintainability of them. For this reason I won't be merging this submission as is.
I do understand the need to be able to cope with this issue, so would suggest an discussion about the different ways we could tackle it, since the way we use ifstream, ostream and fopen usage will all have to altered in some way I believe that this type of discussion should be done on osg-users. Hopefully we'll be able to come up with an approach that is straight forward to implementent and maintain and we can then go do a pure on the code base to move it across to using the new scheme. Could you introduce the topic on osg-users? Robert. On Mon, Oct 6, 2008 at 2:28 PM, Michael Platings <[EMAIL PROTECTED]> wrote: > Hi Robert, > Windows doesn't support the UTF-8 code-page. Therefore any filename > containing a character outside the current code-page cannot be loaded by > OpenSceneGraph. > To fix this I have added a OSG_USE_UTF8_FILENAME advanced option for CMake > (off by default) > When enabled, all file access functions use the wide-character alternative > (e.g. _wfopen instead of fopen). The filename argument is assumed to be a > UTF-8 string which is converted to a UTF-16 string. > > Thanks, > Michael Platings > > BTW, here's a good discussion of the problem previously posted by Ben > Discoe. His statement that C++ stream IO doesn't support wide filenames > seems to be true in the standard, however Visual C++ does allow wide-string > filenames. > > OSG on Windows passes your strings directly to fopen, or the C++ stream > equivalent. File paths are assumed to be in the local OS's filesystem > character set. This means that e.g. Chinese filenames can be opened on > computers with Chinese version of Windows, and Western filenames can be > opened on computer with Western version of Windows. So, to do exactly what > you describe below, OSG already does it. > > However, it is true that if a Chinese user sent you a file with a Chinese > filename, you could not open it with OSG on your non-Chinese OS. To do that, > OSG would indeed have to add Unicode filename support. Unicode means that > any file can be opened on any machine. > > To support Unicode ,with the C standard lib on Windows, it is quite easy to > replace usage of fopen with _wfopen. However, there are many places in OSG's > code base where the C++ stream IO is used instead of fopen. AFAIK, there is > no _w version of those methods, so OSG is stuck. > > Just as a note, this whole thing is delightfully a non-issue on Mac OS X, > and (some?) flavors of Linux, in which UTF-8 is the filesystem charset, so > plain old fopen() handles everything. > > -Ben > >> ---------- > >> From: Reed McKenna > >> Sent: Tuesday, April 22, 2008 4:00 PM > >> > >> We build an application for Windows XP using OpenSceneGraph. We have > >> more and more users from Asian countries who want to read in files > >> that have names with Asian characters. Windows' NTFS file system > >> stores file names in Unicode. How can I have osgDB::readNodeFile (and > >> writeNodeFile, etc.) read from and write to these files, using the full >> NTFS Unicode file name? > >> If it is not currently possible, are there any plans in the works to > >> make it possible? > >> > >> Reed > > _______________________________________________ > > osg-users mailing list > > [EMAIL PROTECTED] > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ______________________________________________________________________ > This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they > are addressed. If you have received this email in error please notify > the system manager. > > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org > > _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
