1 
2 /*
3  * Copyright 2010 Google Inc.
4  *
5  * Use of this source code is governed by a BSD-style license that can be
6  * found in the LICENSE file.
7  */
8 
9 
10 #ifndef SkGradientBitmapCache_DEFINED
11 #define SkGradientBitmapCache_DEFINED
12 
13 #include "SkBitmap.h"
14 
15 class SkGradientBitmapCache : SkNoncopyable {
16 public:
17     SkGradientBitmapCache(int maxEntries);
18     ~SkGradientBitmapCache();
19 
20     bool find(const void* buffer, size_t len, SkBitmap*) const;
21     void add(const void* buffer, size_t len, const SkBitmap&);
22 
23 private:
24     int fEntryCount;
25     const int fMaxEntries;
26 
27     struct Entry;
28     mutable Entry*  fHead;
29     mutable Entry*  fTail;
30 
31     inline Entry* detach(Entry*) const;
32     inline void attachToHead(Entry*) const;
33 
34 #ifdef SK_DEBUG
35     void validate() const;
36 #else
validate()37     void validate() const {}
38 #endif
39 
40     class AutoValidate : SkNoncopyable {
41     public:
AutoValidate(const SkGradientBitmapCache * bc)42         AutoValidate(const SkGradientBitmapCache* bc) : fBC(bc) { bc->validate(); }
~AutoValidate()43         ~AutoValidate() { fBC->validate(); }
44     private:
45         const SkGradientBitmapCache* fBC;
46     };
47 };
48 
49 #endif
50