OLD | NEW |
| (Empty) |
1 /* | |
2 * Copyright 2014 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 GrCacheable_DEFINED | |
9 #define GrCacheable_DEFINED | |
10 | |
11 #include "SkRefCnt.h" | |
12 | |
13 class GrResourceCacheEntry; | |
14 | |
15 /** | |
16 * Base class for objects that can be kept in the GrResourceCache. | |
17 */ | |
18 class GrCacheable : public SkNoncopyable { | |
19 public: | |
20 SK_DECLARE_INST_COUNT_ROOT(GrCacheable) | |
21 | |
22 // These method signatures are written to mirror SkRefCnt. However, we don't
require | |
23 // thread safety as GrCacheable objects are not intended to cross thread bou
ndaries. | |
24 // internal_dispose() exists because of GrTexture's reliance on it. It will
be removed | |
25 // soon. | |
26 void ref() const { ++fRefCnt; } | |
27 void unref() const { --fRefCnt; if (0 == fRefCnt) { this->internal_dispose()
; } } | |
28 virtual void internal_dispose() const { SkDELETE(this); } | |
29 bool unique() const { return 1 == fRefCnt; } | |
30 #ifdef SK_DEBUG | |
31 void validate() const { | |
32 SkASSERT(fRefCnt > 0); | |
33 } | |
34 #endif | |
35 | |
36 virtual ~GrCacheable() { SkASSERT(0 == fRefCnt); } | |
37 | |
38 /** | |
39 * Retrieves the amount of GPU memory used by this resource in bytes. It is | |
40 * approximate since we aren't aware of additional padding or copies made | |
41 * by the driver. | |
42 * | |
43 * @return the amount of GPU memory used in bytes | |
44 */ | |
45 virtual size_t gpuMemorySize() const = 0; | |
46 | |
47 /** | |
48 * Checks whether the GPU memory allocated to this resource is still in effe
ct. | |
49 * It can become invalid if its context is destroyed or lost, in which case
it | |
50 * should no longer count against the GrResourceCache budget. | |
51 * | |
52 * @return true if this resource is still holding GPU memory | |
53 * false otherwise. | |
54 */ | |
55 virtual bool isValidOnGpu() const = 0; | |
56 | |
57 void setCacheEntry(GrResourceCacheEntry* cacheEntry) { fCacheEntry = cacheEn
try; } | |
58 GrResourceCacheEntry* getCacheEntry() { return fCacheEntry; } | |
59 | |
60 /** | |
61 * Gets an id that is unique for this GrCacheable object. It is static in th
at it does | |
62 * not change when the content of the GrCacheable object changes. This will
never return | |
63 * 0. | |
64 */ | |
65 uint32_t getUniqueID() const { return fUniqueID; } | |
66 | |
67 protected: | |
68 GrCacheable() | |
69 : fRefCnt(1) | |
70 , fCacheEntry(NULL) | |
71 , fUniqueID(CreateUniqueID()) {} | |
72 | |
73 bool isInCache() const { return NULL != fCacheEntry; } | |
74 | |
75 /** | |
76 * This entry point should be called whenever gpuMemorySize() begins | |
77 * reporting a different size. If the object is in the cache, it will call | |
78 * gpuMemorySize() immediately and pass the new size on to the resource | |
79 * cache. | |
80 */ | |
81 void didChangeGpuMemorySize() const; | |
82 | |
83 private: | |
84 static uint32_t CreateUniqueID(); | |
85 | |
86 mutable int32_t fRefCnt; | |
87 GrResourceCacheEntry* fCacheEntry; // NULL if not in cache | |
88 const uint32_t fUniqueID; | |
89 | |
90 typedef SkNoncopyable INHERITED; | |
91 }; | |
92 | |
93 #endif | |
OLD | NEW |