extend FontConfigInterface to start to match new fontmgr design

trunk/include/ports/SkFontConfigInterface.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFontConfigInterface_DEFINED
 #define SkFontConfigInterface_DEFINED
 
@@ skipping 63 matching lines @@
      *  if the FontRef's data is not available. The caller is responsible for
      *  calling stream->unref() when it is done accessing the data.
      */
     virtual SkStream* openStream(const FontIdentity&) = 0;
 
     /**
      *  Return a singleton instance of a direct subclass that calls into
      *  libfontconfig. This does not affect the refcnt of the returned instance.
      */
     static SkFontConfigInterface* GetSingletonDirectInterface();
+
+    // New APIS, which have default impls for now (which do nothing)
+
+    struct Style {

[bungeman-skia, 2013/03/29 19:40:36]

Should the style also contain a FontIdentity? Then you would have an opaque
thing to pass back to get that specific font.

[reed1, 2013/03/29 20:11:58]

Done via matchFamilyStyle()

+        int fWeight;
+        int fWidth;
+        int fSlant;
+    };
+
+    virtual int countFamilies();
+    virtual int getFamilySet(int index, SkString* outFamilyName,
+                             Style style[], int maxCount);
+    virtual int matchFamilySet(const char familyName[], SkString* outFamilyName,
+                               Style styles[], int maxCount);
 };
 
 #endif