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a28be3c120
Tested ElectricDreams #rnx [FYI] Charles.deRousiers, Marien.ElAlaoui [CL 35656003 by sebastien hillaire in ue5-main branch]
105 lines
4.8 KiB
C
105 lines
4.8 KiB
C
// Copyright Epic Games, Inc. All Rights Reserved.
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/*================================================================================================
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SubstrateDefinitions.ush: used in ray tracing shaders and C++ code to define common constants
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!!! Changing this file requires recompilation of the engine !!!
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=================================================================================================*/
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#pragma once
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#ifndef __cplusplus
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// Change this to force recompilation of all Substrate dependent shaders (for instance https://guidgenerator.com/online-guid-generator.aspx)
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#pragma message("UESHADERMETADATA_VERSION 1F256706-39AF-450F-A2C1-6A10D9030F4E")
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#endif
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// Closure offsets are packed into 32bits, each entry using SUBSTRATE_CLOSURE_OFFSET_BIT_COUNT bits
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#define SUBSTRATE_MAX_CLOSURE_COUNT_FOR_CLOSUREOFFSET 8u
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#define SUBSTRATE_CLOSURE_OFFSET_BIT_COUNT 4u
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#define SUBSTRATE_CLOSURE_OFFSET_BIT_MASK 0xF
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// We can only ever use SUBSTRATE_MAX_CLOSURE_COUNT_FOR_CLOSUREOFFSET for Lumen, so we use that as a global closure count limit today.
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#define SUBSTRATE_MAX_CLOSURE_COUNT SUBSTRATE_MAX_CLOSURE_COUNT_FOR_CLOSUREOFFSET
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#define SUBSTRATE_MAX_OPERATOR_COUNT 15
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// It this is changed, STATE_BIT_COUNT_SHAREDLOCALBASESID and HEADER_BIT_COUNT_SHAREDLOCALBASES_COUNT also needs to be updated
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#define SUBSTRATE_MAX_SHAREDLOCALBASES_REGISTERS 4
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#define SUBSTRATE_PACKED_SHAREDLOCALBASIS_STRIDE_BYTES 4
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// As of today, a fully simplified material is a slab with all features allowed. It can thus be complex if anisotropy is enabled and in this case eats up to 32bytes.
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// SUBSTRATE_TODO: fully simplified should remove all features but fuzz maybe.
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#define SUBSTRATE_FULLY_SIMPLIFIED_NUM_UINTS (32/4)
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#define SUBSTRATE_BSDF_TYPE_SLAB 0
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#define SUBSTRATE_BSDF_TYPE_VOLUMETRICFOGCLOUD 1
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#define SUBSTRATE_BSDF_TYPE_UNLIT 2
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#define SUBSTRATE_BSDF_TYPE_HAIR 3
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#define SUBSTRATE_BSDF_TYPE_SINGLELAYERWATER 4
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#define SUBSTRATE_BSDF_TYPE_EYE 5
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// When more than 7 BSDF must exists, please update STATE_BIT_COUNT_BSDF and FSubstrateClassification.ShadingModels packing in Substrate.ush
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// The size of Substrate material classification tiles on screen
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#define SUBSTRATE_TILE_SIZE 8
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#define SUBSTRATE_TILE_SIZE_DIV_AS_SHIFT 3
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// The default thickness of a layer is considered to be 0.01 centimeter = 0.1 millimeter
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#define SUBSTRATE_LAYER_DEFAULT_THICKNESS_CM 0.01f
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// Min Fuzz Roughness to avoid numerical issue
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#define SUBSTRATE_MIN_FUZZ_ROUGHNESS 0.02f
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#define SUBSTRATE_BASE_PASS_MRT_OUTPUT_COUNT 3
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#define SUBSTRATE_SSS_DATA_UINT_COUNT 2
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#define SUBSTRATE_OPERATOR_WEIGHT 0
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#define SUBSTRATE_OPERATOR_VERTICAL 1
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#define SUBSTRATE_OPERATOR_HORIZONTAL 2
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#define SUBSTRATE_OPERATOR_ADD 3
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#define SUBSTRATE_OPERATOR_BSDF 4
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#define SUBSTRATE_OPERATOR_BSDF_LEGACY 5
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// Sometimes, Unlit or Weight operators are used to transport data for other meaning (e.g. Light Function or ConvertToDecal)
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#define SUBSTRATE_OPERATOR_SUBUSAGE_NONE 0
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#define SUBSTRATE_OPERATOR_SUBUSAGE_UI 1
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#define SUBSTRATE_OPERATOR_SUBUSAGE_LIGHTFUNCTION 2
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#define SUBSTRATE_OPERATOR_SUBUSAGE_POSTPROCESS 3
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#define SUBSTRATE_OPERATOR_SUBUSAGE_DECAL 4
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// This must map directly to ESubstrateTileMaterialType
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#define SUBSTRATE_TILE_TYPE_SIMPLE 0
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#define SUBSTRATE_TILE_TYPE_SINGLE 1
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#define SUBSTRATE_TILE_TYPE_COMPLEX 2
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#define SUBSTRATE_TILE_TYPE_COMPLEX_SPECIAL 3
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#define SUBSTRATE_TILE_TYPE_ROUGH_REFRACT 4
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#define SUBSTRATE_TILE_TYPE_ROUGH_REFRACT_SSS_WITHOUT 5
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#define SUBSTRATE_TILE_TYPE_DECAL_SIMPLE 6
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#define SUBSTRATE_TILE_TYPE_DECAL_SINGLE 7
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#define SUBSTRATE_TILE_TYPE_DECAL_COMPLEX 8
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#define SUBSTRATE_TILE_TYPE_COUNT 9
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#define SUBSTRATE_MATERIAL_TYPE_SIMPLE 0
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#define SUBSTRATE_MATERIAL_TYPE_SINGLE 1
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#define SUBSTRATE_MATERIAL_TYPE_COMPLEX 2
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#define SUBSTRATE_MATERIAL_TYPE_COMPLEX_SPECIAL 3
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#define SUBSTRATE_TILE_ENCODING_16BITS 0
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#define SUBSTRATE_TILE_ENCODING_8BITS 1
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// Specular profile
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#define SUBSTRATE_SPECULAR_PROFILE_ENTRY_LIGHT 0u
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#define SUBSTRATE_SPECULAR_PROFILE_ENTRY_ENV 1u
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#define SUBSTRATE_SPECULAR_PROFILE_ENTRY_COUNT 2u
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// sizeof(FRHIDrawIndirectParameters) = 4 uints = 16 bytes
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#define GetSubstrateTileTypeDrawIndirectArgOffset_Byte(x) (x * 16)
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#define GetSubstrateTileTypeDrawIndirectArgOffset_DWord(x) (x * 4)
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// sizeof(FRHIDispatchIndirectParameters) can vary per-platform
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#ifdef __cplusplus
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#define GetSubstrateTileTypeDispatchIndirectArgOffset_Byte(x) (x * sizeof(FRHIDispatchIndirectParameters))
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#define GetSubstrateTileTypeDispatchIndirectArgOffset_DWord(x) (x * sizeof(FRHIDispatchIndirectParameters) / sizeof(uint32))
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#else
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#define GetSubstrateTileTypeDispatchIndirectArgOffset_Byte(x) (x * DISPATCH_INDIRECT_UINT_COUNT * 4)
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#define GetSubstrateTileTypeDispatchIndirectArgOffset_DWord(x) (x * DISPATCH_INDIRECT_UINT_COUNT)
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#endif |