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This is important in case the data aren't owned by the instance but instead referencing something else, for example the importer, a memory-mapped file or another instance. Will get increasingly important for zero-copy data import.next
Vladimír Vondruš
3 years ago
7 changed files with 164 additions and 14 deletions
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# |
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# This file is part of Magnum. |
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# |
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# Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, |
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# 2020, 2021, 2022 Vladimír Vondruš <mosra@centrum.cz> |
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# |
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# Permission is hereby granted, free of charge, to any person obtaining a |
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# copy of this software and associated documentation files (the "Software"), |
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# to deal in the Software without restriction, including without limitation |
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# the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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# and/or sell copies of the Software, and to permit persons to whom the |
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# Software is furnished to do so, subject to the following conditions: |
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# |
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# The above copyright notice and this permission notice shall be included |
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# in all copies or substantial portions of the Software. |
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# |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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# DEALINGS IN THE SOFTWARE. |
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# |
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if(MAGNUM_WITH_PYTHON) |
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add_custom_target(MagnumTradePython SOURCES PythonBindings.h) |
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install(FILES PythonBindings.h DESTINATION ${MAGNUM_INCLUDE_INSTALL_DIR}/Trade) |
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endif() |
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#ifndef Magnum_Trade_PythonBindings_h |
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#define Magnum_Trade_PythonBindings_h |
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/*
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, |
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2020, 2021, 2022 Vladimír Vondruš <mosra@centrum.cz> |
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|
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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|
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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|
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#include <memory> /* :( */ |
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#include <pybind11/pybind11.h> |
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#include "Magnum/Trade/Data.h" |
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#include "Magnum/Trade/MeshData.h" /* :( */ |
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namespace Magnum { namespace Trade { |
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namespace Implementation { |
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/* For assertions only */ |
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template<class T> inline bool pyDataFlagsNeedOwner(const T& data) { |
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return !(data.dataFlags() & (DataFlag::Owned|DataFlag::Global)); |
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} |
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inline bool pyDataFlagsNeedOwner(const Trade::MeshData& data) { |
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return |
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!(data.indexDataFlags() & (DataFlag::Owned|DataFlag::Global)) || |
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!(data.vertexDataFlags() & (DataFlag::Owned|DataFlag::Global)); |
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} |
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} |
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/* Stores additional stuff needed for proper refcounting of non-owning FooData.
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Better than subclassing each FooData class because then we would need to |
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wrap it every time it's exposed to Python, making 3rd party bindings |
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unnecessarily complex */ |
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template<class T> struct PyDataHolder: std::unique_ptr<T> { |
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explicit PyDataHolder(T* object): PyDataHolder{object, pybind11::none{}} { |
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/* Data without an owner can only be self-owned or global */ |
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CORRADE_INTERNAL_ASSERT(!Implementation::pyDataFlagsNeedOwner(*object)); |
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} |
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explicit PyDataHolder(T* object, pybind11::object owner): std::unique_ptr<T>{object}, owner{std::move(owner)} {} |
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pybind11::object owner; |
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}; |
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template<class T> PyDataHolder<T> pyDataHolder(T&& data, pybind11::object owner) { |
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return PyDataHolder<T>{new T{std::move(data)}, std::move(owner)}; |
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} |
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}} |
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PYBIND11_DECLARE_HOLDER_TYPE(T, Magnum::Trade::PyDataHolder<T>) |
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#endif |
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