mirror of
https://github.com/KhronosGroup/Vulkan-Hpp
synced 2024-09-19 14:19:55 +00:00
267 lines
11 KiB
C++
267 lines
11 KiB
C++
template <typename X, typename Y>
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struct StructExtends
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{
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enum
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{
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value = false
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};
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};
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template <typename Type, class...>
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struct IsPartOfStructureChain
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{
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static const bool valid = false;
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};
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template <typename Type, typename Head, typename... Tail>
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struct IsPartOfStructureChain<Type, Head, Tail...>
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{
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static const bool valid = std::is_same<Type, Head>::value || IsPartOfStructureChain<Type, Tail...>::valid;
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};
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template <size_t Index, typename T, typename... ChainElements>
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struct StructureChainContains
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{
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static const bool value = std::is_same<T, typename std::tuple_element<Index, std::tuple<ChainElements...>>::type>::value ||
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StructureChainContains<Index - 1, T, ChainElements...>::value;
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};
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template <typename T, typename... ChainElements>
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struct StructureChainContains<0, T, ChainElements...>
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{
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static const bool value = std::is_same<T, typename std::tuple_element<0, std::tuple<ChainElements...>>::type>::value;
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};
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template <size_t Index, typename... ChainElements>
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struct StructureChainValidation
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{
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using TestType = typename std::tuple_element<Index, std::tuple<ChainElements...>>::type;
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static const bool valid = StructExtends<TestType, typename std::tuple_element<0, std::tuple<ChainElements...>>::type>::value &&
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( TestType::allowDuplicate || !StructureChainContains<Index - 1, TestType, ChainElements...>::value ) &&
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StructureChainValidation<Index - 1, ChainElements...>::valid;
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};
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template <typename... ChainElements>
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struct StructureChainValidation<0, ChainElements...>
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{
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static const bool valid = true;
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};
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template <typename... ChainElements>
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class StructureChain : public std::tuple<ChainElements...>
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{
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public:
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StructureChain() VULKAN_HPP_NOEXCEPT
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{
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static_assert( StructureChainValidation<sizeof...( ChainElements ) - 1, ChainElements...>::valid, "The structure chain is not valid!" );
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link<sizeof...( ChainElements ) - 1>();
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}
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StructureChain( StructureChain const & rhs ) VULKAN_HPP_NOEXCEPT : std::tuple<ChainElements...>( rhs )
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{
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static_assert( StructureChainValidation<sizeof...( ChainElements ) - 1, ChainElements...>::valid, "The structure chain is not valid!" );
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link( &std::get<0>( *this ),
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&std::get<0>( rhs ),
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reinterpret_cast<VkBaseOutStructure *>( &std::get<0>( *this ) ),
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reinterpret_cast<VkBaseInStructure const *>( &std::get<0>( rhs ) ) );
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}
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StructureChain( StructureChain && rhs ) VULKAN_HPP_NOEXCEPT : std::tuple<ChainElements...>( std::forward<std::tuple<ChainElements...>>( rhs ) )
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{
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static_assert( StructureChainValidation<sizeof...( ChainElements ) - 1, ChainElements...>::valid, "The structure chain is not valid!" );
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link( &std::get<0>( *this ),
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&std::get<0>( rhs ),
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reinterpret_cast<VkBaseOutStructure *>( &std::get<0>( *this ) ),
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reinterpret_cast<VkBaseInStructure const *>( &std::get<0>( rhs ) ) );
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}
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StructureChain( ChainElements const &... elems ) VULKAN_HPP_NOEXCEPT : std::tuple<ChainElements...>( elems... )
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{
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static_assert( StructureChainValidation<sizeof...( ChainElements ) - 1, ChainElements...>::valid, "The structure chain is not valid!" );
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link<sizeof...( ChainElements ) - 1>();
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}
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StructureChain & operator=( StructureChain const & rhs ) VULKAN_HPP_NOEXCEPT
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{
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std::tuple<ChainElements...>::operator=( rhs );
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link( &std::get<0>( *this ),
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&std::get<0>( rhs ),
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reinterpret_cast<VkBaseOutStructure *>( &std::get<0>( *this ) ),
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reinterpret_cast<VkBaseInStructure const *>( &std::get<0>( rhs ) ) );
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return *this;
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}
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StructureChain & operator=( StructureChain && rhs ) = delete;
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template <typename T = typename std::tuple_element<0, std::tuple<ChainElements...>>::type, size_t Which = 0>
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T & get() VULKAN_HPP_NOEXCEPT
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{
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return std::get<ChainElementIndex<0, T, Which, void, ChainElements...>::value>( static_cast<std::tuple<ChainElements...> &>( *this ) );
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}
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template <typename T = typename std::tuple_element<0, std::tuple<ChainElements...>>::type, size_t Which = 0>
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T const & get() const VULKAN_HPP_NOEXCEPT
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{
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return std::get<ChainElementIndex<0, T, Which, void, ChainElements...>::value>( static_cast<std::tuple<ChainElements...> const &>( *this ) );
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}
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template <typename T0, typename T1, typename... Ts>
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std::tuple<T0 &, T1 &, Ts &...> get() VULKAN_HPP_NOEXCEPT
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{
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return std::tie( get<T0>(), get<T1>(), get<Ts>()... );
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}
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template <typename T0, typename T1, typename... Ts>
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std::tuple<T0 const &, T1 const &, Ts const &...> get() const VULKAN_HPP_NOEXCEPT
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{
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return std::tie( get<T0>(), get<T1>(), get<Ts>()... );
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}
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// assign a complete structure to the StructureChain without modifying the chaining
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template <typename T = typename std::tuple_element<0, std::tuple<ChainElements...>>::type, size_t Which = 0>
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StructureChain & assign( const T & rhs ) VULKAN_HPP_NOEXCEPT
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{
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T & lhs = get<T, Which>();
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void * pNext = lhs.pNext;
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lhs = rhs;
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lhs.pNext = pNext;
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return *this;
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}
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template <typename ClassType, size_t Which = 0>
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typename std::enable_if<std::is_same<ClassType, typename std::tuple_element<0, std::tuple<ChainElements...>>::type>::value && ( Which == 0 ), bool>::type
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isLinked() const VULKAN_HPP_NOEXCEPT
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{
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return true;
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}
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template <typename ClassType, size_t Which = 0>
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typename std::enable_if<!std::is_same<ClassType, typename std::tuple_element<0, std::tuple<ChainElements...>>::type>::value || ( Which != 0 ), bool>::type
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isLinked() const VULKAN_HPP_NOEXCEPT
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{
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static_assert( IsPartOfStructureChain<ClassType, ChainElements...>::valid, "Can't unlink Structure that's not part of this StructureChain!" );
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return isLinked( reinterpret_cast<VkBaseInStructure const *>( &get<ClassType, Which>() ) );
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}
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template <typename ClassType, size_t Which = 0>
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typename std::enable_if<!std::is_same<ClassType, typename std::tuple_element<0, std::tuple<ChainElements...>>::type>::value || ( Which != 0 ), void>::type
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relink() VULKAN_HPP_NOEXCEPT
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{
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static_assert( IsPartOfStructureChain<ClassType, ChainElements...>::valid, "Can't relink Structure that's not part of this StructureChain!" );
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auto pNext = reinterpret_cast<VkBaseInStructure *>( &get<ClassType, Which>() );
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VULKAN_HPP_ASSERT( !isLinked( pNext ) );
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auto & headElement = std::get<0>( static_cast<std::tuple<ChainElements...> &>( *this ) );
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pNext->pNext = reinterpret_cast<VkBaseInStructure const *>( headElement.pNext );
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headElement.pNext = pNext;
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}
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template <typename ClassType, size_t Which = 0>
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typename std::enable_if<!std::is_same<ClassType, typename std::tuple_element<0, std::tuple<ChainElements...>>::type>::value || ( Which != 0 ), void>::type
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unlink() VULKAN_HPP_NOEXCEPT
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{
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static_assert( IsPartOfStructureChain<ClassType, ChainElements...>::valid, "Can't unlink Structure that's not part of this StructureChain!" );
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unlink( reinterpret_cast<VkBaseOutStructure const *>( &get<ClassType, Which>() ) );
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}
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private:
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template <int Index, typename T, int Which, typename, class First, class... Types>
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struct ChainElementIndex : ChainElementIndex<Index + 1, T, Which, void, Types...>
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{
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};
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template <int Index, typename T, int Which, class First, class... Types>
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struct ChainElementIndex<Index, T, Which, typename std::enable_if<!std::is_same<T, First>::value, void>::type, First, Types...>
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: ChainElementIndex<Index + 1, T, Which, void, Types...>
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{
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};
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template <int Index, typename T, int Which, class First, class... Types>
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struct ChainElementIndex<Index, T, Which, typename std::enable_if<std::is_same<T, First>::value, void>::type, First, Types...>
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: ChainElementIndex<Index + 1, T, Which - 1, void, Types...>
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{
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};
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template <int Index, typename T, class First, class... Types>
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struct ChainElementIndex<Index, T, 0, typename std::enable_if<std::is_same<T, First>::value, void>::type, First, Types...>
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: std::integral_constant<int, Index>
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{
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};
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bool isLinked( VkBaseInStructure const * pNext ) const VULKAN_HPP_NOEXCEPT
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{
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VkBaseInStructure const * elementPtr =
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reinterpret_cast<VkBaseInStructure const *>( &std::get<0>( static_cast<std::tuple<ChainElements...> const &>( *this ) ) );
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while ( elementPtr )
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{
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if ( elementPtr->pNext == pNext )
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{
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return true;
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}
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elementPtr = elementPtr->pNext;
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}
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return false;
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}
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template <size_t Index>
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typename std::enable_if<Index != 0, void>::type link() VULKAN_HPP_NOEXCEPT
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{
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auto & x = std::get<Index - 1>( static_cast<std::tuple<ChainElements...> &>( *this ) );
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x.pNext = &std::get<Index>( static_cast<std::tuple<ChainElements...> &>( *this ) );
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link<Index - 1>();
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}
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template <size_t Index>
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typename std::enable_if<Index == 0, void>::type link() VULKAN_HPP_NOEXCEPT
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{
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}
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void link( void * dstBase, void const * srcBase, VkBaseOutStructure * dst, VkBaseInStructure const * src )
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{
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while ( src->pNext )
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{
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std::ptrdiff_t offset = reinterpret_cast<char const *>( src->pNext ) - reinterpret_cast<char const *>( srcBase );
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dst->pNext = reinterpret_cast<VkBaseOutStructure *>( reinterpret_cast<char *>( dstBase ) + offset );
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dst = dst->pNext;
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src = src->pNext;
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}
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dst->pNext = nullptr;
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}
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void unlink( VkBaseOutStructure const * pNext ) VULKAN_HPP_NOEXCEPT
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{
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VkBaseOutStructure * elementPtr = reinterpret_cast<VkBaseOutStructure *>( &std::get<0>( static_cast<std::tuple<ChainElements...> &>( *this ) ) );
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while ( elementPtr && ( elementPtr->pNext != pNext ) )
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{
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elementPtr = elementPtr->pNext;
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}
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if ( elementPtr )
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{
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elementPtr->pNext = pNext->pNext;
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}
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else
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{
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VULKAN_HPP_ASSERT( false ); // fires, if the ClassType member has already been unlinked !
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}
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}
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};
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// interupt the VULKAN_HPP_NAMESPACE for a moment to add specializations of std::tuple_size and std::tuple_element for the StructureChain!
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}
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namespace std
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{
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template <typename... Elements>
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struct tuple_size<VULKAN_HPP_NAMESPACE::StructureChain<Elements...>>
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{
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static constexpr size_t value = std::tuple_size<std::tuple<Elements...>>::value;
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};
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template <std::size_t Index, typename... Elements>
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struct tuple_element<Index, VULKAN_HPP_NAMESPACE::StructureChain<Elements...>>
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{
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using type = typename std::tuple_element<Index, std::tuple<Elements...>>::type;
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};
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} // namespace std
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namespace VULKAN_HPP_NAMESPACE
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{
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