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102 lines
4.4 KiB
102 lines
4.4 KiB
#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, 2023 Vladimír Vondruš <mosra@centrum.cz> |
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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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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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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/MaterialData.h" /* :( */ |
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#include "Magnum/Trade/MeshData.h" /* :( */ |
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#include "Magnum/Trade/SceneData.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 MaterialData& data) { |
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return |
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!(data.attributeDataFlags() & (DataFlag::Owned|DataFlag::Global)) || |
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!(data.layerDataFlags() & (DataFlag::Owned|DataFlag::Global)); |
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} |
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inline bool pyDataFlagsNeedOwner(const 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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inline bool pyDataFlagsNeedOwner(const MeshAttributeData& data) { |
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return data.data().data(); |
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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, global or empty */ |
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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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/* Compared to PyDataHolder this stores two owner objects. Has to be a template |
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even though it's only ever used for a single type because |
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PYBIND11_DECLARE_HOLDER_TYPE() wants it to be so. */ |
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template<class T> struct PySceneFieldDataHolder: std::unique_ptr<SceneFieldData> { |
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explicit PySceneFieldDataHolder(SceneFieldData* object): PySceneFieldDataHolder{object, pybind11::none{}, pybind11::none{}} { |
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/* Data without owners can only be empty */ |
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CORRADE_INTERNAL_ASSERT(!object->mappingData().data() && !object->fieldData().data()); |
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} |
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explicit PySceneFieldDataHolder(SceneFieldData* object, pybind11::object mappingOwner, pybind11::object fieldOwner): std::unique_ptr<T>{object}, mappingOwner{std::move(mappingOwner)}, fieldOwner{std::move(fieldOwner)} {} |
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pybind11::object mappingOwner, fieldOwner; |
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}; |
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inline PySceneFieldDataHolder<SceneFieldData> pySceneFieldDataHolder(SceneFieldData&& data, pybind11::object mappingOwner, pybind11::object fieldOwner) { |
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return PySceneFieldDataHolder<SceneFieldData>{new SceneFieldData{std::move(data)}, std::move(mappingOwner), std::move(fieldOwner)}; |
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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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PYBIND11_DECLARE_HOLDER_TYPE(T, Magnum::Trade::PySceneFieldDataHolder<T>) |
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#endif
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