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dataSourceHash.h
Go to the documentation of this file.
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//
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// Copyright 2023 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#ifndef PXR_IMAGING_HD_DATASOURCE_HASH_H
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#define PXR_IMAGING_HD_DATASOURCE_HASH_H
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#include "
pxr/pxr.h
"
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#include "
pxr/imaging/hd/api.h
"
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#include "
pxr/imaging/hd/dataSource.h
"
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PXR_NAMESPACE_OPEN_SCOPE
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using
HdDataSourceHashType
= size_t;
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/// Compute hash of a data source by using sampled from startTime to
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/// endTime.
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///
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/// Warning: this hash is not strong and is bad for fingerprinting
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/// where the hash for two data sources being equal has to imply that
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/// the two data sources have equal data with high probability.
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/// The has is only 64bit and makes various performance tradeoffs
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/// such that is suitable for a hashtable but not for fingerprinting.
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///
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HD_API
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HdDataSourceHashType
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HdDataSourceHash
(HdDataSourceBaseHandle
const
&ds,
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const
HdSampledDataSource::Time
startTime,
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const
HdSampledDataSource::Time
endTime);
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PXR_NAMESPACE_CLOSE_SCOPE
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#endif
HdDataSourceHashType
size_t HdDataSourceHashType
Definition:
dataSourceHash.h:34
api.h
HD_API
#define HD_API
Definition:
api.h:40
dataSource.h
HdDataSourceHash
HD_API HdDataSourceHashType HdDataSourceHash(HdDataSourceBaseHandle const &ds, const HdSampledDataSource::Time startTime, const HdSampledDataSource::Time endTime)
pxr.h
HdSampledDataSource::Time
float Time
Definition:
dataSource.h:173
PXR_NAMESPACE_OPEN_SCOPE
PXR_NAMESPACE_CLOSE_SCOPE PXR_NAMESPACE_OPEN_SCOPE
Definition:
path.h:1432
PXR_NAMESPACE_CLOSE_SCOPE
#define PXR_NAMESPACE_CLOSE_SCOPE
Definition:
pxr.h:91
pxr
imaging
hd
dataSourceHash.h
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