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      1 /*
      2  * Copyright 2013 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #ifndef SkTypefacePriv_DEFINED
      9 #define SkTypefacePriv_DEFINED
     10 
     11 #include "SkTypeface.h"
     12 
     13 /**
     14  *  Return a ref'd typeface, which must later be unref'd
     15  *
     16  *  If the parameter is non-null, it will be ref'd and returned, otherwise
     17  *  it will be the default typeface.
     18  */
     19 static inline sk_sp<SkTypeface> ref_or_default(SkTypeface* face) {
     20     return face ? sk_ref_sp(face) : SkTypeface::MakeDefault();
     21 }
     22 
     23 /**
     24  *  Always resolves to a non-null typeface, either the value passed to its
     25  *  constructor, or the default typeface if null was passed.
     26  */
     27 class SkAutoResolveDefaultTypeface : public sk_sp<SkTypeface> {
     28 public:
     29     SkAutoResolveDefaultTypeface() : INHERITED(SkTypeface::MakeDefault()) {}
     30 
     31     SkAutoResolveDefaultTypeface(SkTypeface* face)
     32         : INHERITED(ref_or_default(face)) {}
     33 
     34 private:
     35     typedef sk_sp<SkTypeface> INHERITED;
     36 };
     37 
     38 #endif
     39