[Fontconfig] Excluding fonts

[Owen Taylor]

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On Tue, 2003-03-04 at 13:20, Keith Packard wrote:
> I'm thinking it would be nice to allow people to elide some fonts from 
> their configurations.  It seems like there are a couple of ways:
> 
> 	1)	exclude by path name -- have a regex that matches
> 		filenames and includes/excludes them.
> 
> 	2)	exclude by pattern -- have some match rules that
> 		select fonts by pattern and include/exclude them.
> 
> 1) would allow us to easily eliminate all .pcf.gz fonts from the 
> configuration while 2) would allow us to build "suitcases" if combined 
> with some conditional expressions based on X resources or environment 
> variables.

The Red Hat fontconfig package actually has the attached patch in
it. (I haven't submitted for obvious total-hack reasons). A way to do
this as a config option would be nice.

While this patch is more like 1), I do actually know the full pathnames
to these fonts, so 2) would work as well, if it is perhaps a little
less robust. (They are from the ghostscript distribution and don't
render properly with FreeType.)

Regards,
                                          Owen



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--- fontconfig/src/fcdir.c.blacklist	Mon Aug 26 15:57:40 2002
+++ fontconfig/src/fcdir.c	Fri Aug 30 14:59:05 2002
@@ -150,6 +150,40 @@
     return ret;
 }
 
+static FcBool
+FcBlackListed (const char *name)
+{
+    static const char * const black_listed_names[] = {
+	"hrger.pfa",
+	"hrgrr.pfa",
+	"hritr.pfa",
+	"hrpld.pfa",
+	"hrpldi.pfa",
+	"hrplt.pfa",
+	"hrplti.pfa",
+	"hrscc.pfa",
+	"hrscs.pfa",
+	"u003043t.gsf",
+	"u004006t.gsf"
+    };
+
+    int low = 0;
+    int high = sizeof(black_listed_names) / sizeof(black_listed_names[0]) - 1;
+
+    while (low <= high) {
+	int mid = (low + high) / 2;
+	int res = strcmp (name, black_listed_names[mid]);
+	if (res == 0)
+	    return FcTrue;
+	else if (res < 0)
+	    high = mid - 1;
+	else
+	    low = mid + 1;
+    }
+
+    return FcFalse;
+}
+
 #define FC_MAX_FILE_LEN	    4096
 
 FcBool
@@ -201,7 +235,8 @@
     }
     while (ret && (e = readdir (d)))
     {
-	if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN)
+	if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN &&
+	    !FcBlackListed (e->d_name))
 	{
 	    strcpy ((char *) base, (char *) e->d_name);
 	    ret = FcFileScan (set, dirs, cache, blanks, file, force);

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