242 lines
11 KiB
HLSL
242 lines
11 KiB
HLSL
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#ifndef UNITY_DOTS_INSTANCING_INCLUDED
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#define UNITY_DOTS_INSTANCING_INCLUDED
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#ifdef UNITY_DOTS_INSTANCING_ENABLED
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/*
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Here's a bit of python code to generate these repetitive typespecs without
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a lot of C macro magic
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def print_dots_instancing_typespecs(elem_type, id_char, elem_size):
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print(f"#define UNITY_DOTS_INSTANCING_TYPESPEC_{elem_type} {id_char}{elem_size}")
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for y in range(1, 5):
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for x in range(1, 5):
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rows = "" if y == 1 else f"x{y}"
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size = elem_size * x * y
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print(f"#define UNITY_DOTS_INSTANCING_TYPESPEC_{elem_type}{x}{rows} {id_char}{size}")
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for t, c, sz in (
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('float', 'F', 4),
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('int', 'I', 4),
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('uint', 'U', 4),
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('half', 'H', 2)
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):
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print_dots_instancing_typespecs(t, c, sz)
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*/
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float F4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float1 F4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float2 F8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float3 F12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float4 F16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float1x2 F8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float2x2 F16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float3x2 F24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float4x2 F32
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float1x3 F12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float2x3 F24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float3x3 F36
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float4x3 F48
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float1x4 F16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float2x4 F32
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float3x4 F48
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#define UNITY_DOTS_INSTANCING_TYPESPEC_float4x4 F64
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int I4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int1 I4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int2 I8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int3 I12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int4 I16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int1x2 I8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int2x2 I16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int3x2 I24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int4x2 I32
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int1x3 I12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int2x3 I24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int3x3 I36
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int4x3 I48
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int1x4 I16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int2x4 I32
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int3x4 I48
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#define UNITY_DOTS_INSTANCING_TYPESPEC_int4x4 I64
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint U4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint1 U4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint2 U8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint3 U12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint4 U16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint1x2 U8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint2x2 U16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint3x2 U24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint4x2 U32
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint1x3 U12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint2x3 U24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint3x3 U36
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint4x3 U48
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint1x4 U16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint2x4 U32
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint3x4 U48
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#define UNITY_DOTS_INSTANCING_TYPESPEC_uint4x4 U64
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half H2
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half1 H2
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half2 H4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half3 H6
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half4 H8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half1x2 H4
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half2x2 H8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half3x2 H12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half4x2 H16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half1x3 H6
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half2x3 H12
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half3x3 H18
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half4x3 H24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half1x4 H8
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half2x4 H16
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half3x4 H24
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#define UNITY_DOTS_INSTANCING_TYPESPEC_half4x4 H32
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#define UNITY_DOTS_INSTANCING_CONCAT2(a, b) a ## b
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#define UNITY_DOTS_INSTANCING_CONCAT4(a, b, c, d) a ## b ## c ## d
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#define UNITY_DOTS_INSTANCING_CONCAT_WITHOUT_METADATA(metadata_prefix, typespec, metadata_underscore_var) UNITY_DOTS_INSTANCING_CONCAT4(metadata_prefix, typespec, _, metadata_underscore_var)
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#define UNITY_DOTS_INSTANCING_CONCAT_WITH_METADATA(metadata_prefix, typespec, name) UNITY_DOTS_INSTANCING_CONCAT4(metadata_prefix, typespec, _Metadata, name)
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// Metadata constants for properties have the following name format:
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// unity_DOTSInstancing<Type><Size>_Metadata<Name>
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// where
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// <Type> is a single character element type specifier (e.g. F for float4x4)
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// F = float, I = int, U = uint, H = half
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// <Size> is the total size of the property in bytes (e.g. 64 for float4x4)
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// <Name> is the name of the property
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// NOTE: There is no underscore between 'Metadata' and <Name> to avoid a double
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// underscore in the common case where the property name starts with an underscore.
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// A prefix double underscore is illegal on some platforms like OpenGL.
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#define UNITY_DOTS_INSTANCED_METADATA_NAME(type, name) UNITY_DOTS_INSTANCING_CONCAT_WITH_METADATA(unity_DOTSInstancing, UNITY_DOTS_INSTANCING_CONCAT2(UNITY_DOTS_INSTANCING_TYPESPEC_, type), name)
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#define UNITY_DOTS_INSTANCED_METADATA_NAME_FROM_MACRO(type, metadata_underscore_var) UNITY_DOTS_INSTANCING_CONCAT_WITHOUT_METADATA(unity_DOTSInstancing, UNITY_DOTS_INSTANCING_CONCAT2(UNITY_DOTS_INSTANCING_TYPESPEC_, type), metadata_underscore_var)
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#define UNITY_DOTS_INSTANCING_START(name) cbuffer UnityDOTSInstancing_##name {
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#define UNITY_DOTS_INSTANCING_END(name) }
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#define UNITY_DOTS_INSTANCED_PROP(type, name) uint UNITY_DOTS_INSTANCED_METADATA_NAME(type, name);
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// There is a separate FROM_MACRO variant to be used in macros of the form
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// #define <MACRO_NAME> UNITY_DOTS_INSTANCED_METADATA_NAME_FROM_MACRO(float4, Metadata<MACRO_NAME>)
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// These kinds of macros can be used to have shader code load constants from DOTS instancing
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// as if they were normal constants.
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// The reason for having the FROM_MACRO variant is that the fxc shader preprocessor is buggy,
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// and refuses to expand macros correctly if the macro body contains the macro itself.
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// The correct behavior would be for the macro name to appear in the expansion as is (i.e. no recursion),
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// but fxc's preprocessor completely breaks down in this situation.
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#define UNITY_ACCESS_DOTS_INSTANCED_PROP(type, var) LoadDOTSInstancedData_##type(UNITY_DOTS_INSTANCED_METADATA_NAME(type, var))
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#define UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(type, metadata_underscore_var) LoadDOTSInstancedData_##type(UNITY_DOTS_INSTANCED_METADATA_NAME_FROM_MACRO(type, metadata_underscore_var))
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#define UNITY_ACCESS_DOTS_AND_TRADITIONAL_INSTANCED_PROP(type, arr, var) LoadDOTSInstancedData_##type(UNITY_DOTS_INSTANCED_METADATA_NAME(type, var))
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// TODO: Shader feature level to compute only
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ByteAddressBuffer unity_DOTSInstanceData;
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// The data has to be wrapped inside a struct, otherwise the instancing code path
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// on some platforms does not trigger.
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struct DOTSVisibleData
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{
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uint4 VisibleData;
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};
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// The name of this cbuffer has to start with "UnityInstancing" and a struct so it's
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// detected as an "instancing cbuffer" by some platforms that use string matching
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// to detect this.
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CBUFFER_START(UnityInstancingDOTS_InstanceVisibility)
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DOTSVisibleData unity_DOTSVisibleInstances[UNITY_INSTANCED_ARRAY_SIZE];
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CBUFFER_END
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uint GetDOTSInstanceIndex()
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{
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return unity_DOTSVisibleInstances[unity_InstanceID].VisibleData.x;
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}
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uint ComputeDOTSInstanceDataAddress(uint metadata, uint stride)
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{
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uint isOverridden = metadata & 0x80000000;
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uint baseAddress = metadata & 0x7fffffff;
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uint offset = isOverridden
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? (GetDOTSInstanceIndex() * stride)
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: 0;
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return baseAddress + offset;
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}
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#define DEFINE_DOTS_LOAD_INSTANCE_SCALAR(type, conv, sizeof_type) \
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type LoadDOTSInstancedData_##type(uint metadata) \
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{ \
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uint address = ComputeDOTSInstanceDataAddress(metadata, sizeof_type); \
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return conv(unity_DOTSInstanceData.Load(address)); \
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}
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#define DEFINE_DOTS_LOAD_INSTANCE_VECTOR(type, width, conv, sizeof_type) \
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type##width LoadDOTSInstancedData_##type##width(uint metadata) \
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{ \
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uint address = ComputeDOTSInstanceDataAddress(metadata, sizeof_type * width); \
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return conv(unity_DOTSInstanceData.Load##width(address)); \
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}
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DEFINE_DOTS_LOAD_INSTANCE_SCALAR(float, asfloat, 4)
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DEFINE_DOTS_LOAD_INSTANCE_SCALAR(int, int, 4)
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DEFINE_DOTS_LOAD_INSTANCE_SCALAR(uint, uint, 4)
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DEFINE_DOTS_LOAD_INSTANCE_SCALAR(half, half, 2)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(float, 2, asfloat, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(float, 3, asfloat, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(float, 4, asfloat, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(int, 2, int2, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(int, 3, int3, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(int, 4, int4, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(uint, 2, uint2, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(uint, 3, uint3, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(uint, 4, uint4, 4)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(half, 2, half2, 2)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(half, 3, half3, 2)
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DEFINE_DOTS_LOAD_INSTANCE_VECTOR(half, 4, half4, 2)
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// TODO: Other matrix sizes
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float4x4 LoadDOTSInstancedData_float4x4(uint metadata)
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{
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uint address = ComputeDOTSInstanceDataAddress(metadata, 4 * 16);
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float4 p1 = asfloat(unity_DOTSInstanceData.Load4(address + 0 * 16));
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float4 p2 = asfloat(unity_DOTSInstanceData.Load4(address + 1 * 16));
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float4 p3 = asfloat(unity_DOTSInstanceData.Load4(address + 2 * 16));
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float4 p4 = asfloat(unity_DOTSInstanceData.Load4(address + 3 * 16));
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return float4x4(
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p1.x, p2.x, p3.x, p4.x,
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p1.y, p2.y, p3.y, p4.y,
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p1.z, p2.z, p3.z, p4.z,
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p1.w, p2.w, p3.w, p4.w);
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}
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float4x4 LoadDOTSInstancedData(float4x4 dummy, uint metadata) { return LoadDOTSInstancedData_float4x4(metadata); }
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float4x4 LoadDOTSInstancedData_float4x4_from_float3x4(uint metadata)
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{
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uint address = ComputeDOTSInstanceDataAddress(metadata, 3 * 16);
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float4 p1 = asfloat(unity_DOTSInstanceData.Load4(address + 0 * 16));
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float4 p2 = asfloat(unity_DOTSInstanceData.Load4(address + 1 * 16));
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float4 p3 = asfloat(unity_DOTSInstanceData.Load4(address + 2 * 16));
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return float4x4(
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p1.x, p1.w, p2.z, p3.y,
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p1.y, p2.x, p2.w, p3.z,
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p1.z, p2.y, p3.x, p3.w,
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0.0, 0.0, 0.0, 1.0
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);
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}
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float2x4 LoadDOTSInstancedData_float2x4(uint metadata)
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{
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uint address = ComputeDOTSInstanceDataAddress(metadata, 4 * 8);
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return float2x4(
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asfloat(unity_DOTSInstanceData.Load4(address + 0 * 8)),
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asfloat(unity_DOTSInstanceData.Load4(address + 1 * 8)));
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}
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float2x4 LoadDOTSInstancedData(float2x4 dummy, uint metadata) { return LoadDOTSInstancedData_float2x4(metadata); }
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#undef DEFINE_DOTS_LOAD_INSTANCE_SCALAR
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#undef DEFINE_DOTS_LOAD_INSTANCE_VECTOR
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#endif // UNITY_DOTS_INSTANCING_ENABLED
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#endif // UNITY_DOTS_INSTANCING_INCLUDED
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