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 GrGpuResourceCacheAccess_DEFINED 9 #define GrGpuResourceCacheAccess_DEFINED 10 11 #include "GrGpuResource.h" 12 #include "GrGpuResourcePriv.h" 13 14 namespace skiatest { 15 class Reporter; 16 } 17 18 /** 19 * This class allows GrResourceCache increased privileged access to GrGpuResource objects. 20 */ 21 class GrGpuResource::CacheAccess { 22 private: 23 /** 24 * Is the resource currently cached as scratch? This means it is cached, has a valid scratch 25 * key, and does not have a unique key. 26 */ isScratch()27 bool isScratch() const { 28 return !fResource->getUniqueKey().isValid() && fResource->fScratchKey.isValid() && 29 SkBudgeted::kYes == fResource->resourcePriv().isBudgeted(); 30 } 31 32 /** 33 * Called by the cache to delete the resource under normal circumstances. 34 */ release()35 void release() { 36 fResource->release(); 37 if (fResource->isPurgeable()) { 38 delete fResource; 39 } 40 } 41 42 /** 43 * Called by the cache to delete the resource when the backend 3D context is no longer valid. 44 */ abandon()45 void abandon() { 46 fResource->abandon(); 47 if (fResource->isPurgeable()) { 48 delete fResource; 49 } 50 } 51 52 /** Called by the cache to assign a new unique key. */ setUniqueKey(const GrUniqueKey & key)53 void setUniqueKey(const GrUniqueKey& key) { fResource->fUniqueKey = key; } 54 55 /** Called by the cache to make the unique key invalid. */ removeUniqueKey()56 void removeUniqueKey() { fResource->fUniqueKey.reset(); } 57 timestamp()58 uint32_t timestamp() const { return fResource->fTimestamp; } setTimestamp(uint32_t ts)59 void setTimestamp(uint32_t ts) { fResource->fTimestamp = ts; } 60 61 /** Called by the cache to record when this became purgeable. */ setFlushCntWhenResourceBecamePurgeable(uint32_t cnt)62 void setFlushCntWhenResourceBecamePurgeable(uint32_t cnt) { 63 SkASSERT(fResource->isPurgeable()); 64 fResource->fExternalFlushCntWhenBecamePurgeable = cnt; 65 } setTimeWhenResourceBecomePurgeable()66 void setTimeWhenResourceBecomePurgeable() { 67 SkASSERT(fResource->isPurgeable()); 68 fResource->fTimeWhenBecamePurgeable = GrStdSteadyClock::now(); 69 } 70 /** 71 * Called by the cache to determine whether this resource has been puregable for more than 72 * a threshold number of external flushes. 73 */ flushCntWhenResourceBecamePurgeable()74 uint32_t flushCntWhenResourceBecamePurgeable() { 75 SkASSERT(fResource->isPurgeable()); 76 return fResource->fExternalFlushCntWhenBecamePurgeable; 77 } 78 /** 79 * Called by the cache to determine whether this resource should be purged based on the length 80 * of time it has been available for purging. 81 */ timeWhenResourceBecamePurgeable()82 GrStdSteadyClock::time_point timeWhenResourceBecamePurgeable() { 83 SkASSERT(fResource->isPurgeable()); 84 return fResource->fTimeWhenBecamePurgeable; 85 } 86 accessCacheIndex()87 int* accessCacheIndex() const { return &fResource->fCacheArrayIndex; } 88 CacheAccess(GrGpuResource * resource)89 CacheAccess(GrGpuResource* resource) : fResource(resource) {} CacheAccess(const CacheAccess & that)90 CacheAccess(const CacheAccess& that) : fResource(that.fResource) {} 91 CacheAccess& operator=(const CacheAccess&); // unimpl 92 93 // No taking addresses of this type. 94 const CacheAccess* operator&() const; 95 CacheAccess* operator&(); 96 97 GrGpuResource* fResource; 98 99 friend class GrGpuResource; // to construct/copy this type. 100 friend class GrResourceCache; // to use this type 101 friend void test_unbudgeted_to_scratch(skiatest::Reporter* reporter); // for unit testing 102 }; 103 cacheAccess()104inline GrGpuResource::CacheAccess GrGpuResource::cacheAccess() { return CacheAccess(this); } 105 cacheAccess()106inline const GrGpuResource::CacheAccess GrGpuResource::cacheAccess() const { 107 return CacheAccess(const_cast<GrGpuResource*>(this)); 108 } 109 110 #endif 111