[GRASS-dev] font path question for Linux and Windows

[Glynn Clements]

William Kyngesburye wrote:

> > First, we should try to come up with a list of directories which are
> > viable candidates for containing fonts.
> >
> > The installed freetypecap file (currently just a copy of
> > scripts/d.text.freetype/freetypecap) should be generated by scanning
> > all such directories for .ttf files.
> >
> > If browsing for font files, I would suggest starting with whichever
> > directory has the most entries in the freetypecap file.
> >
> > BTW, with Cygwin, I would suggest starting with $WINDIR/Fonts,
> > converted to a Cygwin path, e.g. "cygpath -u $WINDIR/fonts". Windows
> > is likely to have more fonts than Cygwin.
> >
> Note that font names on OSX aren't required to follow any file  
> extension conventions.  First the HFS+ file type/creator is used to  
> determine if a file is a font, then the file extension if the type/ 
> creator are empty.  I think it's that order.
> 
> So scanning automatically for fonts to create the freetypecap may  
> miss many fonts, unless it knew how to check OSX type/creator info  
> for a file.
> 
> ie the MS fonts that come with the system have no extension.  Also,  
> many TT fonts in OSX have been repackaged in the .dfont (a flattened  
> resource-fork file).

In which case, users will need to construct the freetypecap file
manually.

The rest of GRASS doesn't care about filenames. If a name passed to
R_font() matches the first field of a line in the freetypecap file,
the second field is passed directly to FT_New_Face(). Also, if the
argument to R_font() begins with "/"[1] and doesn't begin with (the
expansion of) "$GISBASE/fonts/", it is treated similarly.

[1]. Er, that isn't going to work on native Windows. The line:

		if (name[0] == '/')

[lib/driver/Font.c:27]

will need to be changed to something like:

	#ifdef __MINGW32__
		if (isalpha(name[0]) && name[1] == ':' && (name[2] == '\\' || name[2] == '/'))
	#else
		if (name[0] == '/')
	#endif

Hmm; that still doesn't handle UNC paths.

	... || (name[0] == '\\' && name[1] == '\\') || (name[0] == '/' && name[1] == '/')

This is starting to get ugly.

-- 
Glynn Clements <glynn at gclements.plus.com>