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HUSD_LockedStage.h
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1 /*
2  * Copyright 2019 Side Effects Software Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 
18 #ifndef __HUSD_LockedStage_h__
19 #define __HUSD_LockedStage_h__
20 
21 #include "HUSD_API.h"
22 #include "HUSD_DataHandle.h"
23 #include "HUSD_Utils.h"
24 #include <UT/UT_StringHolder.h>
25 #include <UT/UT_UniquePtr.h>
26 
27 // This class wraps a stage that is constructed from a LOP node by the
28 // HUSD_LockedStageRegistry, and which is guaranteed not to change, even if
29 // the node recooks. This is used primarily by reference and sublayer LOPs
30 // which can reference their inputs. But we may reference the same input
31 // multiple times, with different context options values. So we actually
32 // need to reference a locked copy of the LOP's stage.
33 //
34 // Only the HUSD_LockedStageRegistry singleton should create these objects,
35 // though they may be destroyed by anyone that holds onto a shared pointer
36 // to one. Only const methods are exposed publicly.
38 {
39 public:
41 
42  bool isValid() const;
43  bool strippedLayers() const;
45  { return myRootLayerIdentifier; }
46 
47 private:
49  bool strip_layers);
50 
51  bool lockStage(const HUSD_DataHandle &data,
52  bool strip_layers);
53 
54  class husd_LockedStagePrivate;
55 
57  UT_StringHolder myRootLayerIdentifier;
58  bool myStrippedLayers;
60 };
61 
62 #endif
63 
#define HUSD_API
Definition: HUSD_API.h:32
const UT_StringHolder & getRootLayerIdentifier() const
GLint GLenum GLsizei GLint GLsizei const void * data
Definition: glew.h:1379