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layerPrefetchRequest.h
1 //
2 // Copyright 2016 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:
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24 #ifndef PCP_LAYER_PREFETCH_REQUEST_H
25 #define PCP_LAYER_PREFETCH_REQUEST_H
26 
27 #include "pxr/pxr.h"
28 #include "pxr/usd/pcp/api.h"
29 #include "pxr/usd/sdf/layer.h"
30 
31 #include <set>
32 #include <utility>
33 
34 PXR_NAMESPACE_OPEN_SCOPE
35 
36 class Pcp_MutedLayers;
37 
47 {
48 public:
52  PCP_API
54  const SdfLayerRefPtr &layer,
55  const SdfLayer::FileFormatArguments &args);
56 
58  PCP_API
59  void Run(const Pcp_MutedLayers& mutedLayers);
60 
61 private:
62  // The request object retains both the layer requests and
63  // the pre-fetched sublayers.
64  typedef std::pair<SdfLayerRefPtr, SdfLayer::FileFormatArguments> _Request;
65  std::set<_Request> _sublayerRequests;
66 
67  std::set<SdfLayerRefPtr> _retainedLayers;
68 };
69 
70 PXR_NAMESPACE_CLOSE_SCOPE
71 
72 #endif // PCP_LAYER_PREFETCH_REQUEST_H
PCP_API void Run(const Pcp_MutedLayers &mutedLayers)
Run the queued requests, returning when complete.
PcpLayerPrefetchRequest represents a request to pre-fetch and retain a set of layers in memory...
PCP_API void RequestSublayerStack(const SdfLayerRefPtr &layer, const SdfLayer::FileFormatArguments &args)
Enqueue a request to pre-fetch of the sublayers of layer.
std::map< std::string, std::string > FileFormatArguments
Type for specifying additional file format-specific arguments to layer API.
Definition: layer.h:119