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Optionnal outputs are : CustomData, PreshadowFactors and Velocity (when enabled) Controlled by ini file variable : r.SelectiveBasePassOutputs=true #code_review: Brian.Karis [CL 2702718 by Uriel Doyon in Main branch]
81 lines
3.6 KiB
Plaintext
81 lines
3.6 KiB
Plaintext
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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BasePassCommon.usf: Base pass definitions used by both vertex and pixel shader
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=============================================================================*/
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#undef NEEDS_LIGHTMAP_COORDINATE
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#define NEEDS_LIGHTMAP_COORDINATE (HQ_TEXTURE_LIGHTMAP || LQ_TEXTURE_LIGHTMAP)
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// Translucent materials need to compute fogging in the forward shading pass
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// Materials that read from scene color skip getting fogged, because the contents of the scene color lookup have already been fogged
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// This is not foolproof, as any additional color the material adds will then not be fogged correctly
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#define NEEDS_BASEPASS_FOGGING (ENABLE_TRANSLUCENCY_VERTEX_FOG && ((MATERIALBLENDING_TRANSLUCENT || MATERIALBLENDING_ADDITIVE || MATERIALBLENDING_MODULATE) && !MATERIAL_USES_SCENE_COLOR_COPY))
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#define NEEDS_LIGHTMAP (NEEDS_LIGHTMAP_COORDINATE)
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#define USES_GBUFFER (FEATURE_LEVEL >= FEATURE_LEVEL_SM4 && (MATERIALBLENDING_SOLID || MATERIALBLENDING_MASKED) && !NO_GBUFFER)
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// Only some shader models actually need custom data.
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#define WRITES_CUSTOMDATA_TO_GBUFFER (USES_GBUFFER && (!SELECTIVE_BASEPASS_OUTPUTS || MATERIAL_SHADINGMODEL_SUBSURFACE || MATERIAL_SHADINGMODEL_PREINTEGRATED_SKIN || MATERIAL_SHADINGMODEL_SUBSURFACE_PROFILE || MATERIAL_SHADINGMODEL_CLEAR_COAT))
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// Based on GetPrecomputedShadowMasks()
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#define WRITES_PRECSHADOWFACTOR_TO_GBUFFER (USES_GBUFFER && ALLOW_STATIC_LIGHTING && (!SELECTIVE_BASEPASS_OUTPUTS || (STATICLIGHTING_TEXTUREMASK && STATICLIGHTING_SIGNEDDISTANCEFIELD)))
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#define WRITES_PRECSHADOWFACTOR_ZERO (USES_GBUFFER && ALLOW_STATIC_LIGHTING && (!SELECTIVE_BASEPASS_OUTPUTS || HQ_TEXTURE_LIGHTMAP || LQ_TEXTURE_LIGHTMAP))
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// If a primitive has static lighting, we assume it is not moving. If it is, it will be rerendered in an extra renderpass.
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#define WRITES_VELOCITY_TO_GBUFFER (USES_GBUFFER && OUTPUT_GBUFFER_VELOCITY && (!SELECTIVE_BASEPASS_OUTPUTS || !(STATICLIGHTING_TEXTUREMASK || STATICLIGHTING_SIGNEDDISTANCEFIELD || HQ_TEXTURE_LIGHTMAP || LQ_TEXTURE_LIGHTMAP)))
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// Use an extra interpolator for position
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#define WRITES_VELOCITY_TO_GBUFFER_USE_POS_INTERPOLATOR (WRITES_VELOCITY_TO_GBUFFER && USING_TESSELLATION)
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struct FSharedBasePassInterpolants
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{
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//for texture-lightmapped translucency we can pass the vertex fog in its own interpolator
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#if NEEDS_BASEPASS_FOGGING
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float4 VertexFog : TEXCOORD7;
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#endif
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#if !PC_D3D && !GL4_PROFILE
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// Note: TEXCOORD8 is unused
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#if USE_WORLD_POSITION_EXCLUDING_SHADER_OFFSETS
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float3 PixelPositionExcludingWPO : TEXCOORD9;
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#endif
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#endif
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#if WRITES_VELOCITY_TO_GBUFFER
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// .xy is clip position, pre divide by w; .w is clip W; .z is 0 or 1 to mask out the velocity output
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float4 VelocityPrevScreenPosition : VELOCITY_PREV_POS;
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#if WRITES_VELOCITY_TO_GBUFFER_USE_POS_INTERPOLATOR
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float4 VelocityScreenPosition : VELOCITY_POS;
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#endif
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#endif
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};
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#if PC_D3D || GL4_PROFILE
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/** Interpolants passed from the vertex shader to the pixel shader. */
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struct FBasePassInterpolantsVSToPS : FSharedBasePassInterpolants
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{
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// Note: TEXCOORD8 is unused
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#if USE_WORLD_POSITION_EXCLUDING_SHADER_OFFSETS
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float3 PixelPositionExcludingWPO : TEXCOORD9;
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#endif
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};
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/** Interpolants passed from the vertex shader to the domain shader. */
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struct FBasePassInterpolantsVSToDS : FSharedBasePassInterpolants
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{
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#if USE_WORLD_POSITION_EXCLUDING_SHADER_OFFSETS
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float3 WorldPositionExcludingWPO : TEXCOORD9;
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#endif
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};
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#else
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// Only the PC shader compiler supports HLSL inheritance
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#define FBasePassInterpolantsVSToPS FSharedBasePassInterpolants
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#endif
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