asset_v2.h
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1 //
2 // Copyright 2018 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
10 // names, trademarks, service marks, or product names of the Licensor
11 // and its affiliates, except as required to comply with Section 4(c) of
12 // the License and to reproduce the content of the NOTICE file.
13 //
14 // You may obtain a copy of the Apache License at
15 //
16 // http://www.apache.org/licenses/LICENSE-2.0
17 //
18 // Unless required by applicable law or agreed to in writing, software
19 // distributed under the Apache License with the above modification is
20 // distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
21 // KIND, either express or implied. See the Apache License for the specific
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23 //
24 #ifndef INCLUDE_AR_ASSET
25 #error This file should not be included directly. Include asset.h instead.
26 #endif
27 
28 #ifndef PXR_USD_AR_ASSET_V2_H
29 #define PXR_USD_AR_ASSET_V2_H
30 
32 
33 #include "pxr/pxr.h"
34 #include "pxr/usd/ar/api.h"
35 
36 #include <cstdio>
37 #include <memory>
38 #include <utility>
39 
40 PXR_NAMESPACE_OPEN_SCOPE
41 
47 class ArAsset {
48 public:
49  AR_API
50  virtual ~ArAsset();
51 
52  ArAsset(const ArAsset&) = delete;
53  ArAsset& operator=(const ArAsset&) = delete;
54 
56  AR_API
57  virtual size_t GetSize() const = 0;
58 
67  AR_API
68  virtual std::shared_ptr<const char> GetBuffer() const = 0;
69 
75  AR_API
76  virtual size_t Read(void* buffer, size_t count, size_t offset) const = 0;
77 
95  AR_API
96  virtual std::pair<FILE*, size_t> GetFileUnsafe() const = 0;
97 
98 protected:
99  AR_API
100  ArAsset();
101 };
102 
103 PXR_NAMESPACE_CLOSE_SCOPE
104 
105 #endif // PXR_USD_AR_ASSET_V2_H
virtual AR_API std::pair< FILE *, size_t > GetFileUnsafe() const =0
Returns a read-only FILE* handle and offset for this asset if available, or (nullptr,...
Interface for accessing the contents of an asset.
Definition: asset_v2.h:47
virtual AR_API size_t GetSize() const =0
Returns size of the asset.
virtual AR_API std::shared_ptr< const char > GetBuffer() const =0
Returns a pointer to a buffer with the contents of the asset, with size given by GetSize().
virtual AR_API size_t Read(void *buffer, size_t count, size_t offset) const =0
Read count bytes at offset from the beginning of the asset into buffer.