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devsh
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get boost to generate struct declarations
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‎include/nbl/builtin/hlsl/bda/struct_declare.hlsl‎

Lines changed: 76 additions & 78 deletions
Original file line numberDiff line numberDiff line change
@@ -74,88 +74,86 @@ NBL_CONSTEXPR uint32_t default_alignment_v = default_alignment<T,MemberCount::va
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}
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}
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77-
// time for some macros!
78-
// need to gen identical struct in HLSL and C++
79-
#if 0
80-
// forward declaration - outside of macro
81-
struct MyStruct;
77+
//! Need to gen identical struct in HLSL and C++, right now this tool can declare non-templated structs and full explicit specialized ones
8278

83-
// TODO: to be generated by a BOOST_PP macro:
84-
// - take template parameters list
85-
// - take partial spec name
86-
// - custom alignas on the struct or not
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// - sequence of variable name and type (identifier0,Type0)...(identifierN,TypeN)
88-
89-
template</*T_ARGS*/>
90-
struct ::nbl::hlsl::bda::member_count<MyStruct >
91-
{
92-
NBL_CONSTEXPR_STATIC_INLINE uint32_t value = 3;
93-
};
94-
template</*T_ARGS*/>
95-
struct ::nbl::hlsl::bda::member_type<MyStruct,0>
96-
{
97-
using type = float32_t;
79+
//implementation details
80+
#define NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_TYPE(identifier,...) __VA_ARGS__
81+
#define NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_NAME(identifier,...) identifier
82+
#define NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER_TYPE(r,IDENTIFIER,i,e) template<> \
83+
struct ::nbl::hlsl::bda::member_type<NBL_EVAL IDENTIFIER,i> \
84+
{ \
85+
using type = NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_TYPE e; \
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};
99-
template</*T_ARGS*/>
100-
struct ::nbl::hlsl::bda::member_type<MyStruct,1>
101-
{
102-
using type = int32_t;
103-
};
104-
template</*T_ARGS*/>
105-
struct ::nbl::hlsl::bda::member_type<MyStruct,2>
106-
{
107-
using type = int16_t2;
108-
};
109-
// self alignment
110-
#define NBL_ALIGNAS 8
111-
template<>
112-
struct ::nbl::hlsl::alignment_of<MyStruct >
113-
{
114-
NBL_CONSTEXPR_STATIC_INLINE uint32_t value = ::nbl::hlsl::conditional_value<NBL_ALIGNAS!=0,uint32_t,NBL_ALIGNAS,::nbl::hlsl::bda::impl::default_alignment_v<MyStruct > >::value;
115-
};
116-
template<>
117-
struct ::nbl::hlsl::size_of<MyStruct >
118-
{
119-
NBL_CONSTEXPR_STATIC_INLINE uint32_t __last_member_ix_v = ::nbl::hlsl::bda::member_count_v<MyStruct >-1;
120-
NBL_CONSTEXPR_STATIC_INLINE uint64_t __last_member_offset_v = ::nbl::hlsl::bda::member_offset_v<MyStruct,__last_member_ix_v>;
121-
NBL_CONSTEXPR_STATIC_INLINE uint64_t __last_member_size_v = ::nbl::hlsl::size_of_v<::nbl::hlsl::bda::member_type_t<MyStruct,__last_member_ix_v> >;
122-
NBL_CONSTEXPR_STATIC_INLINE uint32_t value = mpl::align_up_v<__last_member_offset_v+__last_member_size_v,alignment_of_v<MyStruct > >;
123-
};
124-
#ifdef __HLSL_VERSION
125-
/*template<T_ARGS>*/
126-
struct MyStruct
127-
{
128-
[[vk::ext_decorate(spv::DecorationOffset,::nbl::hlsl::bda::member_offset_v<MyStruct,0>)]] float32_t a;
129-
[[vk::ext_decorate(spv::DecorationOffset,::nbl::hlsl::bda::member_offset_v<MyStruct,1>)]] int32_t b;
130-
[[vk::ext_decorate(spv::DecorationOffset,::nbl::hlsl::bda::member_offset_v<MyStruct,2>)]] int16_t2 c;
131-
};
132-
template<uint32_t alignment, bool _restrict/*, T_ARGS*/>
133-
struct nbl::hlsl::bda::__ref<MyStruct,alignment,_restrict> : nbl::hlsl::bda::__base_ref<MyStruct,alignment,_restrict>
134-
{
135-
using base_t = __base_ref<MyStruct,alignment,_restrict>;
136-
using this_t = __ref<MyStruct,alignment,_restrict>;
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138-
::nbl::hlsl::bda::__ref<float32_t,::nbl::hlsl::mpl::min_v<uint32_t,::nbl::hlsl::bda::member_alignment_v<MyStruct,0>,alignment>,_restrict> a;
139-
::nbl::hlsl::bda::__ref<int32_t,::nbl::hlsl::mpl::min_v<uint32_t,::nbl::hlsl::bda::member_alignment_v<MyStruct,1>,alignment>,_restrict> b;
140-
::nbl::hlsl::bda::__ref<int16_t2,::nbl::hlsl::mpl::min_v<uint32_t,::nbl::hlsl::bda::member_alignment_v<MyStruct,2>,alignment>,_restrict> c;
141-
142-
void __init(const ::nbl::hlsl::spirv::bda_pointer_t<MyStruct > _ptr)
143-
{
144-
base_t::__init(_ptr);
145-
a.__init(::nbl::hlsl::spirv::accessChain<float32_t>(base_t::ptr.value,0));
146-
b.__init(::nbl::hlsl::spirv::accessChain<int32_t>(base_t::ptr.value,1));
147-
c.__init(::nbl::hlsl::spirv::accessChain<int16_t2>(base_t::ptr.value,2));
148-
}
149-
};
88+
//! TODO: handle declarations for partial template specializations and non-specializations
89+
#define NBL_HLSL_IMPL_DECLARE_STRUCT_MEMBER(identifier,...) __VA_ARGS__ identifier;
90+
#ifdef __HLSL_VERSION
91+
#define NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER(r,IDENTIFIER,i,e) [[vk::ext_decorate(spv::DecorationOffset,::nbl::hlsl::bda::member_offset_v<NBL_EVAL IDENTIFIER,i>)]] NBL_HLSL_IMPL_DECLARE_STRUCT_MEMBER e
92+
#define NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER_REFERENCE(r,unused,i,e) ::nbl::hlsl::bda::__ref< \
93+
NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_TYPE e, \
94+
::nbl::hlsl::mpl::min_v<uint32_t,::nbl::hlsl::bda::member_alignment_v<__referenced_t,i>,alignment>, \
95+
_restrict> NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_NAME e;
96+
#define NBL_HLSL_IMPL_INIT_STRUCT_MEMBER_REFERENCE(r,unused,i,e) NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_NAME e .__init( \
97+
::nbl::hlsl::spirv::accessChain<NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_TYPE e>(base_t::ptr.value,i) \
98+
);
99+
#define NBL_HLSL_IMPL_DEFINE_STRUCT(IDENTIFIER,MEMBER_SEQ) NBL_EVAL IDENTIFIER \
100+
{ \
101+
BOOST_PP_SEQ_FOR_EACH_I(NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER,IDENTIFIER,MEMBER_SEQ) \
102+
}; \
103+
template<uint32_t alignment, bool _restrict> \
104+
struct ::nbl::hlsl::bda::__ref<NBL_EVAL IDENTIFIER,alignment,_restrict> : ::nbl::hlsl::bda::__base_ref<NBL_EVAL IDENTIFIER,alignment,_restrict> \
105+
{ \
106+
using __referenced_t = NBL_EVAL IDENTIFIER; \
107+
using base_t = __base_ref<__referenced_t,alignment,_restrict>; \
108+
using this_t = __ref<__referenced_t,alignment,_restrict>; \
109+
\
110+
BOOST_PP_SEQ_FOR_EACH_I(NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER_REFERENCE,dummy,MEMBER_SEQ) \
111+
\
112+
void __init(const ::nbl::hlsl::spirv::bda_pointer_t<__referenced_t> _ptr) \
113+
{ \
114+
base_t::__init(_ptr); \
115+
BOOST_PP_SEQ_FOR_EACH_I(NBL_HLSL_IMPL_INIT_STRUCT_MEMBER_REFERENCE,dummy,MEMBER_SEQ) \
116+
} \
117+
}
150118
#else
151-
/*template<T_ARGS>*/
152-
struct /*alignas(NBL_ALIGNAS)*/ MyStruct
153-
{
154-
alignas(::nbl::hlsl::bda::member_alignment_v<MyStruct,0>) float32_t a;
155-
alignas(::nbl::hlsl::bda::member_alignment_v<MyStruct,1>) int32_t b;
156-
alignas(::nbl::hlsl::bda::member_alignment_v<MyStruct,2>) int16_t2 c;
157-
};
158-
#endif
119+
#define NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER(r,IDENTIFIER,i,e) alignas(::nbl::hlsl::bda::member_alignment_v<NBL_EVAL IDENTIFIER,i>) NBL_HLSL_IMPL_DECLARE_STRUCT_MEMBER e
120+
#define NBL_HLSL_IMPL_DEFINE_STRUCT(IDENTIFIER,MEMBER_SEQ) alignas(::nbl::hlsl::alignment_of_v<NBL_EVAL IDENTIFIER >) NBL_EVAL IDENTIFIER \
121+
{ \
122+
BOOST_PP_SEQ_FOR_EACH_I(NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER,IDENTIFIER,MEMBER_SEQ) \
123+
}
159124
#endif
160125

126+
#include <boost/preprocessor/seq/for_each_i.hpp>
127+
#include <boost/preprocessor/seq/size.hpp>
128+
// MEMBER_SEQ is to be a sequence of variable name and type (identifier0,Type0)...(identifierN,TypeN) @see NBL_HLSL_IMPL_DEFINE_STRUCT_GET_MEMBER_TYPE
129+
// the VA_ARGS is the struct alignment for alignas, usage example
130+
// ```
131+
// NBL_HLSL_DEFINE_STRUCT((MyStruct2),
132+
// ((a, float32_t))
133+
// ((b, int32_t))
134+
// ((c, int32_t2))
135+
// );
136+
// ```
137+
#define NBL_HLSL_DEFINE_STRUCT(IDENTIFIER,MEMBER_SEQ, ...) template<> \
138+
struct ::nbl::hlsl::bda::member_count<NBL_EVAL IDENTIFIER > \
139+
{ \
140+
NBL_CONSTEXPR_STATIC_INLINE uint32_t value = BOOST_PP_SEQ_SIZE(MEMBER_SEQ); \
141+
}; \
142+
BOOST_PP_SEQ_FOR_EACH_I(NBL_HLSL_IMPL_DEFINE_STRUCT_MEMBER_TYPE,IDENTIFIER,MEMBER_SEQ) \
143+
template <> \
144+
struct ::nbl::hlsl::alignment_of<NBL_EVAL IDENTIFIER > \
145+
{ \
146+
NBL_CONSTEXPR_STATIC_INLINE uint32_t value = nbl::hlsl::conditional_value<true __VA_OPT__(&&false),uint32_t,::nbl::hlsl::bda::impl::default_alignment_v<NBL_EVAL IDENTIFIER >,__VA_OPT__((__VA_ARGS__)-)0>::value; \
147+
}; \
148+
template<> \
149+
struct ::nbl::hlsl::size_of<NBL_EVAL IDENTIFIER > \
150+
{ \
151+
using type = NBL_EVAL IDENTIFIER; \
152+
NBL_CONSTEXPR_STATIC_INLINE uint32_t __last_member_ix_v = ::nbl::hlsl::bda::member_count_v<type>-1; \
153+
NBL_CONSTEXPR_STATIC_INLINE uint64_t __last_member_offset_v = ::nbl::hlsl::bda::member_offset_v<type,__last_member_ix_v>; \
154+
NBL_CONSTEXPR_STATIC_INLINE uint64_t __last_member_size_v = ::nbl::hlsl::size_of_v<::nbl::hlsl::bda::member_type_t<type,__last_member_ix_v> >; \
155+
NBL_CONSTEXPR_STATIC_INLINE uint32_t value = ::nbl::hlsl::mpl::align_up_v<__last_member_offset_v+__last_member_size_v,alignment_of_v<type > >; \
156+
}; \
157+
struct NBL_HLSL_IMPL_DEFINE_STRUCT(IDENTIFIER,MEMBER_SEQ)
158+
161159
#endif

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