245 lines
9.6 KiB
HLSL
245 lines
9.6 KiB
HLSL
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#ifndef UNIVERSAL_LIT_INPUT_INCLUDED
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#define UNIVERSAL_LIT_INPUT_INCLUDED
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/CommonMaterial.hlsl"
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/SurfaceInput.hlsl"
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/ParallaxMapping.hlsl"
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DBuffer.hlsl"
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#if defined(_DETAIL_MULX2) || defined(_DETAIL_SCALED)
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#define _DETAIL
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#endif
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// NOTE: Do not ifdef the properties here as SRP batcher can not handle different layouts.
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CBUFFER_START(UnityPerMaterial)
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float4 _BaseMap_ST;
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float4 _DetailAlbedoMap_ST;
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half4 _BaseColor;
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half4 _SpecColor;
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half4 _EmissionColor;
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half _Cutoff;
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half _Smoothness;
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half _Metallic;
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half _BumpScale;
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half _Parallax;
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half _OcclusionStrength;
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half _ClearCoatMask;
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half _ClearCoatSmoothness;
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half _DetailAlbedoMapScale;
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half _DetailNormalMapScale;
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half _Surface;
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CBUFFER_END
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// NOTE: Do not ifdef the properties for dots instancing, but ifdef the actual usage.
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// Otherwise you might break CPU-side as property constant-buffer offsets change per variant.
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// NOTE: Dots instancing is orthogonal to the constant buffer above.
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#ifdef UNITY_DOTS_INSTANCING_ENABLED
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UNITY_DOTS_INSTANCING_START(MaterialPropertyMetadata)
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UNITY_DOTS_INSTANCED_PROP(float4, _BaseColor)
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UNITY_DOTS_INSTANCED_PROP(float4, _SpecColor)
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UNITY_DOTS_INSTANCED_PROP(float4, _EmissionColor)
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UNITY_DOTS_INSTANCED_PROP(float , _Cutoff)
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UNITY_DOTS_INSTANCED_PROP(float , _Smoothness)
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UNITY_DOTS_INSTANCED_PROP(float , _Metallic)
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UNITY_DOTS_INSTANCED_PROP(float , _BumpScale)
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UNITY_DOTS_INSTANCED_PROP(float , _Parallax)
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UNITY_DOTS_INSTANCED_PROP(float , _OcclusionStrength)
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UNITY_DOTS_INSTANCED_PROP(float , _ClearCoatMask)
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UNITY_DOTS_INSTANCED_PROP(float , _ClearCoatSmoothness)
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UNITY_DOTS_INSTANCED_PROP(float , _DetailAlbedoMapScale)
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UNITY_DOTS_INSTANCED_PROP(float , _DetailNormalMapScale)
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UNITY_DOTS_INSTANCED_PROP(float , _Surface)
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UNITY_DOTS_INSTANCING_END(MaterialPropertyMetadata)
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#define _BaseColor UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float4 , Metadata_BaseColor)
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#define _SpecColor UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float4 , Metadata_SpecColor)
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#define _EmissionColor UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float4 , Metadata_EmissionColor)
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#define _Cutoff UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_Cutoff)
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#define _Smoothness UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_Smoothness)
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#define _Metallic UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_Metallic)
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#define _BumpScale UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_BumpScale)
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#define _Parallax UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_Parallax)
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#define _OcclusionStrength UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_OcclusionStrength)
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#define _ClearCoatMask UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_ClearCoatMask)
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#define _ClearCoatSmoothness UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_ClearCoatSmoothness)
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#define _DetailAlbedoMapScale UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_DetailAlbedoMapScale)
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#define _DetailNormalMapScale UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_DetailNormalMapScale)
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#define _Surface UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float , Metadata_Surface)
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#endif
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TEXTURE2D(_ParallaxMap); SAMPLER(sampler_ParallaxMap);
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TEXTURE2D(_OcclusionMap); SAMPLER(sampler_OcclusionMap);
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TEXTURE2D(_DetailMask); SAMPLER(sampler_DetailMask);
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TEXTURE2D(_DetailAlbedoMap); SAMPLER(sampler_DetailAlbedoMap);
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TEXTURE2D(_DetailNormalMap); SAMPLER(sampler_DetailNormalMap);
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TEXTURE2D(_MetallicGlossMap); SAMPLER(sampler_MetallicGlossMap);
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TEXTURE2D(_SpecGlossMap); SAMPLER(sampler_SpecGlossMap);
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TEXTURE2D(_ClearCoatMap); SAMPLER(sampler_ClearCoatMap);
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#ifdef _SPECULAR_SETUP
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#define SAMPLE_METALLICSPECULAR(uv) SAMPLE_TEXTURE2D(_SpecGlossMap, sampler_SpecGlossMap, uv)
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#else
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#define SAMPLE_METALLICSPECULAR(uv) SAMPLE_TEXTURE2D(_MetallicGlossMap, sampler_MetallicGlossMap, uv)
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#endif
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half4 SampleMetallicSpecGloss(float2 uv, half albedoAlpha)
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{
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half4 specGloss;
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#ifdef _METALLICSPECGLOSSMAP
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specGloss = half4(SAMPLE_METALLICSPECULAR(uv));
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#ifdef _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
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specGloss.a = albedoAlpha * _Smoothness;
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#else
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specGloss.a *= _Smoothness;
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#endif
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#else // _METALLICSPECGLOSSMAP
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#if _SPECULAR_SETUP
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specGloss.rgb = _SpecColor.rgb;
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#else
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specGloss.rgb = _Metallic.rrr;
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#endif
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#ifdef _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
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specGloss.a = albedoAlpha * _Smoothness;
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#else
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specGloss.a = _Smoothness;
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#endif
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#endif
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return specGloss;
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}
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half SampleOcclusion(float2 uv)
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{
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#ifdef _OCCLUSIONMAP
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// TODO: Controls things like these by exposing SHADER_QUALITY levels (low, medium, high)
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#if defined(SHADER_API_GLES)
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return SAMPLE_TEXTURE2D(_OcclusionMap, sampler_OcclusionMap, uv).g;
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#else
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half occ = SAMPLE_TEXTURE2D(_OcclusionMap, sampler_OcclusionMap, uv).g;
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return LerpWhiteTo(occ, _OcclusionStrength);
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#endif
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#else
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return half(1.0);
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#endif
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}
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// Returns clear coat parameters
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// .x/.r == mask
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// .y/.g == smoothness
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half2 SampleClearCoat(float2 uv)
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{
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#if defined(_CLEARCOAT) || defined(_CLEARCOATMAP)
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half2 clearCoatMaskSmoothness = half2(_ClearCoatMask, _ClearCoatSmoothness);
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#if defined(_CLEARCOATMAP)
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clearCoatMaskSmoothness *= SAMPLE_TEXTURE2D(_ClearCoatMap, sampler_ClearCoatMap, uv).rg;
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#endif
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return clearCoatMaskSmoothness;
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#else
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return half2(0.0, 1.0);
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#endif // _CLEARCOAT
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}
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void ApplyPerPixelDisplacement(half3 viewDirTS, inout float2 uv)
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{
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#if defined(_PARALLAXMAP)
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uv += ParallaxMapping(TEXTURE2D_ARGS(_ParallaxMap, sampler_ParallaxMap), viewDirTS, _Parallax, uv);
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#endif
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}
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// Used for scaling detail albedo. Main features:
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// - Depending if detailAlbedo brightens or darkens, scale magnifies effect.
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// - No effect is applied if detailAlbedo is 0.5.
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half3 ScaleDetailAlbedo(half3 detailAlbedo, half scale)
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{
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// detailAlbedo = detailAlbedo * 2.0h - 1.0h;
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// detailAlbedo *= _DetailAlbedoMapScale;
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// detailAlbedo = detailAlbedo * 0.5h + 0.5h;
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// return detailAlbedo * 2.0f;
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// A bit more optimized
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return half(2.0) * detailAlbedo * scale - scale + half(1.0);
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}
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half3 ApplyDetailAlbedo(float2 detailUv, half3 albedo, half detailMask)
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{
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#if defined(_DETAIL)
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half3 detailAlbedo = SAMPLE_TEXTURE2D(_DetailAlbedoMap, sampler_DetailAlbedoMap, detailUv).rgb;
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// In order to have same performance as builtin, we do scaling only if scale is not 1.0 (Scaled version has 6 additional instructions)
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#if defined(_DETAIL_SCALED)
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detailAlbedo = ScaleDetailAlbedo(detailAlbedo, _DetailAlbedoMapScale);
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#else
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detailAlbedo = half(2.0) * detailAlbedo;
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#endif
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return albedo * LerpWhiteTo(detailAlbedo, detailMask);
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#else
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return albedo;
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#endif
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}
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half3 ApplyDetailNormal(float2 detailUv, half3 normalTS, half detailMask)
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{
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#if defined(_DETAIL)
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#if BUMP_SCALE_NOT_SUPPORTED
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half3 detailNormalTS = UnpackNormal(SAMPLE_TEXTURE2D(_DetailNormalMap, sampler_DetailNormalMap, detailUv));
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#else
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half3 detailNormalTS = UnpackNormalScale(SAMPLE_TEXTURE2D(_DetailNormalMap, sampler_DetailNormalMap, detailUv), _DetailNormalMapScale);
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#endif
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// With UNITY_NO_DXT5nm unpacked vector is not normalized for BlendNormalRNM
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// For visual consistancy we going to do in all cases
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detailNormalTS = normalize(detailNormalTS);
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return lerp(normalTS, BlendNormalRNM(normalTS, detailNormalTS), detailMask); // todo: detailMask should lerp the angle of the quaternion rotation, not the normals
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#else
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return normalTS;
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#endif
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}
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inline void InitializeStandardLitSurfaceData(float2 uv, out SurfaceData outSurfaceData)
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{
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half4 albedoAlpha = SampleAlbedoAlpha(uv, TEXTURE2D_ARGS(_BaseMap, sampler_BaseMap));
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outSurfaceData.alpha = Alpha(albedoAlpha.a, _BaseColor, _Cutoff);
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half4 specGloss = SampleMetallicSpecGloss(uv, albedoAlpha.a);
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outSurfaceData.albedo = albedoAlpha.rgb * _BaseColor.rgb;
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#if _SPECULAR_SETUP
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outSurfaceData.metallic = half(1.0);
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outSurfaceData.specular = specGloss.rgb;
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#else
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outSurfaceData.metallic = specGloss.r;
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outSurfaceData.specular = half3(0.0, 0.0, 0.0);
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#endif
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outSurfaceData.smoothness = specGloss.a;
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outSurfaceData.normalTS = SampleNormal(uv, TEXTURE2D_ARGS(_BumpMap, sampler_BumpMap), _BumpScale);
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outSurfaceData.occlusion = SampleOcclusion(uv);
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outSurfaceData.emission = SampleEmission(uv, _EmissionColor.rgb, TEXTURE2D_ARGS(_EmissionMap, sampler_EmissionMap));
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#if defined(_CLEARCOAT) || defined(_CLEARCOATMAP)
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half2 clearCoat = SampleClearCoat(uv);
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outSurfaceData.clearCoatMask = clearCoat.r;
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outSurfaceData.clearCoatSmoothness = clearCoat.g;
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#else
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outSurfaceData.clearCoatMask = half(0.0);
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outSurfaceData.clearCoatSmoothness = half(0.0);
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#endif
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#if defined(_DETAIL)
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half detailMask = SAMPLE_TEXTURE2D(_DetailMask, sampler_DetailMask, uv).a;
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float2 detailUv = uv * _DetailAlbedoMap_ST.xy + _DetailAlbedoMap_ST.zw;
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outSurfaceData.albedo = ApplyDetailAlbedo(detailUv, outSurfaceData.albedo, detailMask);
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outSurfaceData.normalTS = ApplyDetailNormal(detailUv, outSurfaceData.normalTS, detailMask);
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#endif
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}
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#endif // UNIVERSAL_INPUT_SURFACE_PBR_INCLUDED
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