191 lines
6.6 KiB
HLSL
191 lines
6.6 KiB
HLSL
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// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
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// This code in no way belongs to BrainFailProductions. I have just made a small change to make
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// it work with texture arrays
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#ifndef UNITY_STANDARD_SHADOW_INCLUDED
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#define UNITY_STANDARD_SHADOW_INCLUDED
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#include "UnityCG.cginc"
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#include "Includes/BatchFewStandardConfig.cginc"
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#include "Includes/BatchFewStandardUtils.cginc"
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#if (defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)) && defined(UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS)
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#define UNITY_STANDARD_USE_DITHER_MASK 1
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#endif
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// Need to output UVs in shadow caster, since we need to sample texture and do clip/dithering based on it
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#if defined(_ALPHATEST_ON) || defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)
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#define UNITY_STANDARD_USE_SHADOW_UVS 1
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#endif
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// Has a non-empty shadow caster output struct (it's an error to have empty structs on some platforms...)
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#if !defined(V2F_SHADOW_CASTER_NOPOS_IS_EMPTY) || defined(UNITY_STANDARD_USE_SHADOW_UVS)
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#define UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT 1
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#endif
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#ifdef UNITY_STEREO_INSTANCING_ENABLED
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#define UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT 1
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#endif
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half _Cutoff;
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UNITY_DECLARE_TEX2DARRAY(_MainTex);
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float4 _MainTex_ST;
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#ifdef UNITY_STANDARD_USE_DITHER_MASK
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sampler3D _DitherMaskLOD;
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#endif
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// Handle PremultipliedAlpha from Fade or Transparent shading mode
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#ifdef _SPECGLOSSMAP
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UNITY_DECLARE_TEX2DARRAY(_SpecGlossMap);
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#endif
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#ifdef _METALLICGLOSSMAP
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UNITY_DECLARE_TEX2DARRAY(_MetallicGlossMap);
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#endif
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#if defined(UNITY_STANDARD_USE_SHADOW_UVS) && (defined(_PARALLAXMAP) || defined(_POM))
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UNITY_DECLARE_TEX2DARRAY(_ParallaxMap);
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#endif
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half MetallicSetup_ShadowGetOneMinusReflectivity(half3 uv)
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{
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half metallicity = 0;
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#ifdef _METALLICGLOSSMAP
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metallicity = UNITY_SAMPLE_TEX2DARRAY(_MetallicGlossMap, uv).r;
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#endif
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return OneMinusReflectivityFromMetallic(metallicity);
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}
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half SpecularSetup_ShadowGetOneMinusReflectivity(half3 uv)
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{
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half3 specColor = half3(0,0,0);
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#ifdef _SPECGLOSSMAP
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specColor = UNITY_SAMPLE_TEX2DARRAY(_SpecGlossMap, uv).rgb;
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#endif
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return (1 - SpecularStrength(specColor));
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}
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// SHADOW_ONEMINUSREFLECTIVITY(): workaround to get one minus reflectivity based on UNITY_SETUP_BRDF_INPUT
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#define SHADOW_JOIN2(a, b) a##b
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#define SHADOW_JOIN(a, b) SHADOW_JOIN2(a,b)
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#define SHADOW_ONEMINUSREFLECTIVITY SHADOW_JOIN(UNITY_SETUP_BRDF_INPUT, _ShadowGetOneMinusReflectivity)
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struct VertexInput
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{
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float4 vertex : POSITION;
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float3 normal : NORMAL;
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float4 uv0 : TEXCOORD0;
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float4 color : COLOR;
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#if defined(UNITY_STANDARD_USE_SHADOW_UVS) && (defined(_PARALLAXMAP) || defined(_POM))
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half4 tangent : TANGENT;
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#endif
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
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struct VertexOutputShadowCaster
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{
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V2F_SHADOW_CASTER_NOPOS
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#if defined(UNITY_STANDARD_USE_SHADOW_UVS)
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float4 tex : TEXCOORD1;
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#if (defined(_PARALLAXMAP) || defined(_POM))
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half4 tangentToWorldAndParallax[3]: TEXCOORD2; // [3x3:tangentToWorld | 1x3:viewDirForParallax]
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#endif
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#endif
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};
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#endif
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#ifdef UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT
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struct VertexOutputStereoShadowCaster
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{
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UNITY_VERTEX_OUTPUT_STEREO
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};
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#endif
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// We have to do these dances of outputting SV_POSITION separately from the vertex shader,
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// and inputting VPOS in the pixel shader, since they both map to "POSITION" semantic on
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// some platforms, and then things don't go well.
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void vertShadowCaster (VertexInput v,
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#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
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out VertexOutputShadowCaster o,
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#endif
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#ifdef UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT
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out VertexOutputStereoShadowCaster os,
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#endif
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out float4 opos : SV_POSITION)
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{
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UNITY_SETUP_INSTANCE_ID(v);
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#ifdef UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(os);
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#endif
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TRANSFER_SHADOW_CASTER_NOPOS(o,opos)
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#if defined(UNITY_STANDARD_USE_SHADOW_UVS)
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o.tex.xy = TRANSFORM_TEX(v.uv0.xy * (v.uv0.zw+1), _MainTex);
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o.tex.z = v.color.a * 255;
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o.tex.w = v.color.r * 255;
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#if (defined(_PARALLAXMAP) || defined(_POM))
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TANGENT_SPACE_ROTATION;
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half3 viewDirForParallax = mul (rotation, ObjSpaceViewDir(v.vertex));
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o.tangentToWorldAndParallax[0].w = viewDirForParallax.x;
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o.tangentToWorldAndParallax[1].w = viewDirForParallax.y;
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o.tangentToWorldAndParallax[2].w = viewDirForParallax.z;
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#endif
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#endif
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}
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sampler2D _AttrImg;
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float4 _AttrImg_TexelSize;
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float4 SampleAttrImg(float prop, float index)
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{
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return tex2Dlod(_AttrImg, float4(prop * _AttrImg_TexelSize.x, index * _AttrImg_TexelSize.y, 0, 0));
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}
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half4 fragShadowCaster (
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#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
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VertexOutputShadowCaster i
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#endif
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#ifdef UNITY_STANDARD_USE_DITHER_MASK
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, UNITY_VPOS_TYPE vpos : VPOS
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#endif
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) : SV_Target
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{
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#if defined(UNITY_STANDARD_USE_SHADOW_UVS)
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#if (defined(_PARALLAXMAP) || defined(_POM)) && (SHADER_TARGET >= 30)
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//On d3d9 parallax can also be disabled on the fwd pass when too many sampler are used. See EXCEEDS_D3D9_SM3_MAX_SAMPLER_COUNT. Ideally we should account for that here as well.
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half3 viewDirForParallax = normalize( half3(i.tangentToWorldAndParallax[0].w,i.tangentToWorldAndParallax[1].w,i.tangentToWorldAndParallax[2].w) );
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fixed h = UNITY_SAMPLE_TEX2DARRAY (_ParallaxMap, i.tex).g;
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half2 offset = ParallaxOffset1Step (h, SampleAttrImg(6, i.tex.w).b, viewDirForParallax);
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i.tex.xy += offset;
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#endif
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half alpha = UNITY_SAMPLE_TEX2DARRAY(_MainTex, i.tex).a;
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#if defined(_ALPHATEST_ON)
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clip (alpha - _Cutoff);
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#endif
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#if defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)
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#if defined(_ALPHAPREMULTIPLY_ON)
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half outModifiedAlpha;
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PreMultiplyAlpha(half3(0, 0, 0), alpha, SHADOW_ONEMINUSREFLECTIVITY(i.tex), outModifiedAlpha);
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alpha = outModifiedAlpha;
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#endif
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#if defined(UNITY_STANDARD_USE_DITHER_MASK)
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// Use dither mask for alpha blended shadows, based on pixel position xy
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// and alpha level. Our dither texture is 4x4x16.
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half alphaRef = tex3D(_DitherMaskLOD, float3(vpos.xy*0.25,alpha*0.9375)).a;
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clip (alphaRef - 0.01);
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#else
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clip (alpha - _Cutoff);
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#endif
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#endif
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#endif // #if defined(UNITY_STANDARD_USE_SHADOW_UVS)
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SHADOW_CASTER_FRAGMENT(i)
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}
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#endif // UNITY_STANDARD_SHADOW_INCLUDED
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