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USD_VisCache.h
1 //
2 // Copyright 2017 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
7 // Section 6. Trademarks. is deleted and replaced with:
8 //
9 // 6. Trademarks. This License does not grant permission to use the trade
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24 #ifndef _GUSD_USD_VISCACHE_
25 #define _GUSD_USD_VISCACHE_
26 
27 #include "gusd/api.h"
28 
29 #include "gusd/USD_DataCache.h"
30 #include "gusd/UT_CappedCache.h"
31 
32 #include <SYS/SYS_AtomicInt.h>
33 
34 #include "pxr/pxr.h"
35 #include "pxr/usd/usd/attributeQuery.h"
36 #include "pxr/usd/usdGeom/imageable.h"
37 
38 PXR_NAMESPACE_OPEN_SCOPE
39 
44 class GusdUSD_VisCache final : public GusdUSD_DataCache
45 {
46 public:
47 
48  GUSD_API
49  static GusdUSD_VisCache& GetInstance();
50 
53 
54  virtual ~GusdUSD_VisCache() {}
55 
56  // Not cached.
57  GUSD_API
58  bool GetVisibility(const UsdPrim& prim, UsdTimeCode time);
59 
60  // Cached.
61  GUSD_API
62  bool GetResolvedVisibility(const UsdPrim& prim, UsdTimeCode time);
63 
64  GUSD_API
65  virtual void Clear() override;
66 
67  GUSD_API
68  virtual int64 Clear(const UT_StringSet& paths) override;
69 
70 private:
71  struct VisInfo : public UT_CappedItem
72  {
73  VisInfo(int flags, const UsdAttribute& attr)
74  : UT_CappedItem(), flags(flags), query(attr) {}
75 
76  virtual ~VisInfo() {}
77 
78  virtual int64 getMemoryUsage() const { return sizeof(*this); }
79 
80  SYS_AtomicInt32 flags;
81  UsdAttributeQuery query;
82  };
83  typedef UT_IntrusivePtr<VisInfo> VisInfoHandle;
84 
85  VisInfoHandle _GetVisInfo(const UsdPrim& prim);
86 
88  bool _GetVisibility(int& flags,
89  const UsdAttributeQuery& query,
90  UsdTimeCode time,
91  bool& vis);
92 
93  GusdUT_CappedCache _visInfos;
94 };
95 
96 PXR_NAMESPACE_CLOSE_SCOPE
97 
98 #endif /*_GUSD_USD_VISCACHE_*/
Object for efficiently making repeated queries for attribute values.
Cache for USD stages.
Definition: stageCache.h:54
Scenegraph object for authoring and retrieving numeric, string, and array valued data, sampled over time.
Definition: attribute.h:176
Represent a time value, which may be either numeric, holding a double value, or a sentinel value UsdT...
Definition: timeCode.h:85
UsdPrim is the sole persistent scenegraph object on a UsdStage, and is the embodiment of a &quot;Prim&quot; as ...
Definition: prim.h:131
Variant of UT_CappedCache that improves on item construction.
Thread-safe, memory-capped visibility cache.
Definition: USD_VisCache.h:44