Implementation of IDwriteFactory::CreateCustomFontCollection

[Guillaume Charifi]

Hello, I heard you are working on IDwriteFactory::CreateCustomFontCollection implementation, so I attached my current work, if it can help.
It's almost done, just this part, retrieving the font family name to effectively save it, is to be implemented (even if Adobe Creative Cloud works with this changes):

+        if(!This->families) {
+            This->count = 1;
+            This->alloc = 1;
+            This->families = heap_alloc(This->alloc * sizeof(WCHAR *));
+            This->families[0] = heap_strdupW((const WCHAR[]){'d','u','m','m','y',0});
+        } else {
+            add_family_syscollection(This, (const WCHAR[]){'d','u','m','m','y',0});
+        }

In the hope it could be useful,
Regards