add counting to glyphcache, and refactor some for clarity

include/core/SkGraphics.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkGraphics_DEFINED
@@ skipping 36 matching lines @@
      *  had be called before the new limit was set.
      */
     static size_t SetFontCacheLimit(size_t bytes);
 
     /**
      *  Return the number of bytes currently used by the font cache.
      */
     static size_t GetFontCacheUsed();
 
     /**
+     *  Return the number of entries in the font cache.
+     *  A cache "entry" is associated with each typeface + pointSize + matrix.
+     */
+    static int GetFontCacheCountUsed();
+
+    /**
+     *  Return the current limit to the number of entries in the font cache.
+     *  A cache "entry" is associated with each typeface + pointSize + matrix.
+     */
+    static int GetFontCacheCountLimit();
+
+    /**
+     *  Set the limit to the number of entries in the font cache, and return
+     *  the previous value. If this new value is lower than the previous,
+     *  it will automatically try to purge entries to meet the new limit.
+     */
+    static int SetFontCacheCountLimit(int count);
+    
+    /**
      *  For debugging purposes, this will attempt to purge the font cache. It
      *  does not change the limit, but will cause subsequent font measures and
      *  draws to be recreated, since they will no longer be in the cache.
      */
     static void PurgeFontCache();
 
     static size_t GetImageCacheBytesUsed();
     static size_t GetImageCacheByteLimit();
     static size_t SetImageCacheByteLimit(size_t newLimit);
 
@@ skipping 39 matching lines @@
 public:
     SkAutoGraphics() {
         SkGraphics::Init();
     }
     ~SkAutoGraphics() {
         SkGraphics::Term();
     }
 };
 
 #endif