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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, 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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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::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 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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