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GT_PrimCache.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:
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14 // You may obtain a copy of the Apache License at
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24 #ifndef __GUSD_GT_PRIMCACHE_H__
25 #define __GUSD_GT_PRIMCACHE_H__
26 
27 #include "gusd/api.h"
28 
29 #include "purpose.h"
30 #include "USD_DataCache.h"
31 #include "UT_CappedCache.h"
32 
33 #include <GT/GT_Primitive.h>
34 
35 #include "pxr/pxr.h"
36 #include "pxr/usd/usd/prim.h"
37 
38 PXR_NAMESPACE_OPEN_SCOPE
39 
41 //
42 // We cache a GT prim for each imageable (leaf node) USD prim and each instance.
43 // The GT prims are refined to prims that can be directly imaged in the Houdini
44 // view port.
45 // The cache is build atop a UT_CappedCache (a LRU cache).
46 
47 class GusdGT_PrimCache : public GusdUSD_DataCache {
48 
49 public:
50 
51  GUSD_API
52  static GusdGT_PrimCache& GetInstance();
53 
55  virtual ~GusdGT_PrimCache();
56 
57  GT_PrimitiveHandle GetPrim( const UsdPrim &usdPrim,
58  UsdTimeCode time,
59  GusdPurposeSet purposes,
60  bool skipRoot = false );
61 
62  virtual void Clear() override;
63  virtual int64 Clear(const UT_StringSet& paths) override;
64 
65 private:
66 
67  GusdUT_CappedCache _prims;
68 };
69 
70 PXR_NAMESPACE_CLOSE_SCOPE
71 
72 #endif // __GUSD_GT_PRIMCACHE_H__
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.
Cache of refined GT prims created draw USD in the viewport.
Definition: GT_PrimCache.h:47