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:
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
22 // language governing permissions and limitations under the Apache License.
23 //
24 #ifndef PXR_IMAGING_HIO_IMAGE_REGISTRY_H
25 #define PXR_IMAGING_HIO_IMAGE_REGISTRY_H
26 
27 #include "pxr/pxr.h"
28 #include "pxr/imaging/hio/api.h"
29 #include "pxr/base/tf/singleton.h"
30 
31 #include <memory>
32 #include <string>
33 
34 PXR_NAMESPACE_OPEN_SCOPE
35 
36 using HioImageSharedPtr = std::shared_ptr<class HioImage>;
37 
38 class HioRankedTypeMap;
39 
40 /// \class HioImageRegistry
41 ///
42 /// Manages plugin registration and loading for HioImage subclasses.
43 ///
44 class HioImageRegistry : public TfSingleton<HioImageRegistry>
45 {
46 public:
47     HIO_API
48     static HioImageRegistry& GetInstance();
49 
50     HIO_API
51     bool IsSupportedImageFile(std::string const & filename);
52 
53 private:
54     friend class TfSingleton<HioImageRegistry>;
55     HioImageRegistry();
56 
57     friend class HioImage;
58 
59     HioImageSharedPtr _ConstructImage(std::string const & filename);
60 
61 private:
62     std::unique_ptr<HioRankedTypeMap> const _typeMap;
63 };
64 
65 PXR_NAMESPACE_CLOSE_SCOPE
66 
67 #endif // PXR_IMAGING_HIO_IMAGE_REGISTRY_H
68