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Modified the ShadowContext declaration macro. Only code for slots that are not zero will be generated. 

Changed the shadow context declaration so no code for cubemaps will be generated, anymore.
Modified the texfetch functions. Instead of returning from the loop the routines only break. This fixes a warning about an uninitialized variable and also leads to fewer instructions generated.
Restructured ShadowDispatch.hlsl a little bit to make changing resources and algorithms a bit easier.
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uygar 8 年前
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1fca69f6
共有 4 个文件被更改，包括 183 次插入 和 105 次删除
  1. 23
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/Shadow.hlsl
  2. 4
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/ShadowContext.hlsl
  3. 88
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/ShadowDispatch.hlsl
  4. 173
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/ShadowTexFetch.hlsl

23
Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/Shadow.hlsl
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#include "ShadowBase.cs.hlsl" // ShadowData definition, auto generated (don't modify)
#include "ShadowTexFetch.hlsl" // Resource sampling definitions (don't modify)
#define SHADOWCONTEXT_DECLARE( _Tex2DArraySlots, _TexCubeArraySlots, _SamplerCompSlots, _SamplerSlots ) \
\
struct ShadowContext \
{ \
StructuredBuffer<ShadowData> shadowDatas; \
StructuredBuffer<int4> payloads; \
Texture2DArray tex2DArray[_Tex2DArraySlots]; \
TextureCubeArray texCubeArray[_TexCubeArraySlots]; \
SamplerComparisonState compSamplers[_SamplerCompSlots]; \
SamplerState samplers[_SamplerSlots]; \
}; \
\
// Declares a shadow context struct with members and sampling code based on whether _...Slots > 0
#define SHADOWCONTEXT_DECLARE( _Tex2DArraySlots, _TexCubeArraySlots, _SamplerCompSlots, _SamplerSlots ) \
\
struct ShadowContext \
{ \
StructuredBuffer<ShadowData> shadowDatas; \
StructuredBuffer<int4> payloads; \
SHADOWCONTEXT_DECLARE_TEXTURES( _Tex2DArraySlots, _TexCubeArraySlots, _SamplerCompSlots, _SamplerSlots ) \
}; \
\
// Shadow context definition and initialization, i.e. resource binding (project header, must be kept in sync with C# runtime)
#include "ShadowContext.hlsl"

4
Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/ShadowContext.hlsl
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// This can be custom for each project and needs to be in sync with the ShadowMgr
#define SHADOWCONTEXT_MAX_TEX2DARRAY 4
#define SHADOWCONTEXT_MAX_TEXCUBEARRAY 1
#define SHADOWCONTEXT_MAX_SAMPLER 3
#define SHADOWCONTEXT_MAX_TEXCUBEARRAY 0
#define SHADOWCONTEXT_MAX_SAMPLER 3
#define SHADOWCONTEXT_MAX_COMPSAMPLER 1
SHADOWCONTEXT_DECLARE( SHADOWCONTEXT_MAX_TEX2DARRAY, SHADOWCONTEXT_MAX_TEXCUBEARRAY, SHADOWCONTEXT_MAX_COMPSAMPLER, SHADOWCONTEXT_MAX_SAMPLER );

88
Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/ShadowDispatch.hlsl
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// This file is empty by default.
// Project specific file to override the default shadow sampling routines.
// We need to define which dispatchers we're overriding, otherwise the compiler will pick default implementations which will lead to compile errors.
// We need to define which dispatchers we're overriding, otherwise the compiler will pick default implementations which will lead to compilation errors.
// This is an example of how to override the default dynamic resource dispatcher
// by hardcoding the resources used and calling the shadow sampling routines that take an explicit texture and sampler.
// It is the responsibility of the author to make sure that ShadowContext.hlsl binds the correct texture to the right slot,
// and that on the C# side the shadowContext bindDelegate binds the correct resource to the correct texture id.
//#define SHADOW_DISPATCH_USE_CUSTOM_DIRECTIONAL // enables hardcoded resources and algorithm for directional lights
//#define SHADOW_DISPATCH_USE_CUSTOM_PUNCTUAL // enables hardcoded resources and algorithm for punctual lights
//#define SHADOW_DISPATCH_USE_SEPARATE_PUNC_ALGOS // enables separate resources and algorithms for spot and point lights
// directional
#define SHADOW_DISPATCH_DIR_TEX 0
#define SHADOW_DISPATCH_DIR_SMP 0
#define SHADOW_DISPATCH_DIR_ALG GPUSHADOWALGORITHM_MSM_HAUS
// point
#define SHADOW_DISPATCH_POINT_TEX 3
#define SHADOW_DISPATCH_POINT_SMP 0
#define SHADOW_DISPATCH_POINT_ALG GPUSHADOWALGORITHM_PCF_1TAP
// spot
#define SHADOW_DISPATCH_SPOT_TEX 3
#define SHADOW_DISPATCH_SPOT_SMP 0
#define SHADOW_DISPATCH_SPOT_ALG GPUSHADOWALGORITHM_PCF_9TAP
//punctual
#define SHADOW_DISPATCH_PUNC_TEX 3
#define SHADOW_DISPATCH_PUNC_SMP 0
#define SHADOW_DISPATCH_PUNC_ALG GPUSHADOWALGORITHM_PCF_1TAP
//#define SHADOW_DISPATCH_USE_CUSTOM_DIRECTIONAL
Texture2DArray tex = shadowContext.tex2DArray[0];
SamplerState samp = shadowContext.samplers[0];
uint algo = GPUSHADOWALGORITHM_MSM_HAUS;
Texture2DArray tex = shadowContext.tex2DArray[SHADOW_DISPATCH_DIR_TEX];
SamplerState samp = shadowContext.samplers[SHADOW_DISPATCH_DIR_SMP];
uint algo = SHADOW_DISPATCH_DIR_ALG;
return EvalShadow_CascadedDepth( shadowContext, algo, tex, samp, positionWS, normalWS, shadowDataIndex, L );
}

#endif
// This is an example of how to override the default dynamic resource dispatcher
// by hardcoding the resources used and calling the shadow sampling routines that take an explicit texture and sampler.
// It is the responsibility of the author to make sure that ShadowContext.hlsl binds the correct texture to the right slot,
// and that on the C# side the shadowContext bindDelegate binds the correct resource to the correct texture id.
#define SHADOW_DISPATCH_USE_CUSTOM_PUNCTUAL
// example of overriding punctual lights
#define SHADOW_USE_SEPARATE_ALGOS 0
Texture2DArray tex = shadowContext.tex2DArray[3];
SamplerComparisonState compSamp = shadowContext.compSamplers[0];
#if SHADOW_USE_SEPARATE_ALGOS != 0
#ifdef SHADOW_DISPATCH_USE_SEPARATE_PUNC_ALGOS
// example for choosing different algos for point and spot lights
ShadowData sd = shadowContext.shadowDatas[shadowDataIndex];
uint shadowType;

if( shadowType == GPUSHADOWTYPE_POINT )
return EvalShadow_PointDepth( shadowContext, GPUSHADOWALGORITHM_PCF_1TAP, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
{
Texture2DArray tex = shadowContext.tex2DArray[SHADOW_DISPATCH_POINT_TEX];
SamplerComparisonState compSamp = shadowContext.compSamplers[SHADOW_DISPATCH_POINT_SMP];
uint algo = SHADOW_DISPATCH_POINT_ALG;
return EvalShadow_PointDepth( shadowContext, algo, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
}
return EvalShadow_SpotDepth( shadowContext, GPUSHADOWALGORITHM_PCF_9TAP, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
{
Texture2DArray tex = shadowContext.tex2DArray[SHADOW_DISPATCH_SPOT_TEX];
SamplerComparisonState compSamp = shadowContext.compSamplers[SHADOW_DISPATCH_SPOT_SMP];
uint algo = SHADOW_DISPATCH_SPOT_ALG;
return EvalShadow_SpotDepth( shadowContext, algo, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
}
uint algo = GPUSHADOWALGORITHM_PCF_1TAP;
Texture2DArray tex = shadowContext.tex2DArray[SHADOW_DISPATCH_PUNC_TEX];
SamplerComparisonState compSamp = shadowContext.compSamplers[SHADOW_DISPATCH_PUNC_SMP];
uint algo = SHADOW_DISPATCH_PUNC_ALG;
return EvalShadow_PunctualDepth( shadowContext, algo, tex, compSamp, positionWS, normalWS, shadowDataIndex, L );
#endif
}

}
#undef SHADOW_USE_SEPARATE_ALGOS
#endif
// cleanup the defines
#undef SHADOW_DISPATCH_DIR_TEX
#undef SHADOW_DISPATCH_DIR_SMP
#undef SHADOW_DISPATCH_DIR_ALG
#undef SHADOW_DISPATCH_POINT_TEX
#undef SHADOW_DISPATCH_POINT_SMP
#undef SHADOW_DISPATCH_POINT_ALG
#undef SHADOW_DISPATCH_SPOT_TEX
#undef SHADOW_DISPATCH_SPOT_SMP
#undef SHADOW_DISPATCH_SPOT_ALG
#undef SHADOW_DISPATCH_PUNC_TEX
#undef SHADOW_DISPATCH_PUNC_SMP
#undef SHADOW_DISPATCH_PUNC_ALG
#ifdef SHADOW_DISPATCH_USE_SEPARATE_PUNC_ALGOS
#undef SHADOW_DISPATCH_USE_SEPARATE_PUNC_ALGOS
#endif

173
Assets/ScriptableRenderPipeline/HDRenderPipeline/Shadow/ShadowTexFetch.hlsl
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// This file contains various helper declarations for declaring and sampling members of the ShadowContext struct.
# define SHADOW_DEFINE_SAMPLING_FUNCS( _Tex2DArraySlots, _TexCubeArraySlots ) \
float4 SampleCompShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float slice ) { return SAMPLE_TEXTURE2D_ARRAY_SHADOW( ctxt.tex2DArray[texIdx], ctxt.compSamplers[sampIdx], tcs, slice ); } \
float4 SampleShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float2 tcs, float slice, float lod = 0.0 ) { return SAMPLE_TEXTURE2D_ARRAY_LOD( ctxt.tex2DArray[texIdx], ctxt.samplers[sampIdx], tcs, slice, lod ); } \
float4 SampleCompShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float4 tcs, float cubeIdx ) { return SAMPLE_TEXTURECUBE_ARRAY_SHADOW( ctxt.texCubeArray[texIdx], ctxt.compSamplers[sampIdx], tcs, cubeIdx );} \
float4 SampleShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float cubeIdx, float lod = 0.0 ) { return SAMPLE_TEXTURECUBE_ARRAY_LOD( ctxt.texCubeArray[texIdx], ctxt.samplers[sampIdx], tcs, cubeIdx, lod ); }
# define SHADOW_DEFINE_SAMPLING_FUNC_T2DA_COMP( _Tex2DArraySlots , _SamplerCompSlots ) float4 SampleCompShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float slice ) { return SAMPLE_TEXTURE2D_ARRAY_SHADOW( ctxt.tex2DArray[texIdx], ctxt.compSamplers[sampIdx], tcs, slice ); }
# define SHADOW_DEFINE_SAMPLING_FUNC_T2DA_SAMP( _Tex2DArraySlots , _SamplerSlots ) float4 SampleShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float2 tcs, float slice, float lod = 0.0 ) { return SAMPLE_TEXTURE2D_ARRAY_LOD( ctxt.tex2DArray[texIdx], ctxt.samplers[sampIdx], tcs, slice, lod ); }
# define SHADOW_DEFINE_SAMPLING_FUNC_TCA_COMP( _TexCubeArraySlots, _SamplerCompSlots ) float4 SampleCompShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float4 tcs, float cubeIdx ) { return SAMPLE_TEXTURECUBE_ARRAY_SHADOW( ctxt.texCubeArray[texIdx], ctxt.compSamplers[sampIdx], tcs, cubeIdx );}
# define SHADOW_DEFINE_SAMPLING_FUNC_TCA_SAMP( _TexCubeArraySlots, _SamplerSlots ) float4 SampleShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float cubeIdx, float lod = 0.0 ) { return SAMPLE_TEXTURECUBE_ARRAY_LOD( ctxt.texCubeArray[texIdx], ctxt.samplers[sampIdx], tcs, cubeIdx, lod ); }
# define SHADOW_DEFINE_SAMPLING_FUNCS( _Tex2DArraySlots, _TexCubeArraySlots, _SamplerCompSlots, _SamplerSlots ) \
\
float4 SampleCompShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float slice ) \
{ \
[unroll] for( uint i = 0; i < _Tex2DArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerCompSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
return SAMPLE_TEXTURE2D_ARRAY_SHADOW( ctxt.tex2DArray[i], ctxt.compSamplers[j], tcs, slice ); \
} \
} \
} \
return 1.0; \
} \
\
float4 SampleShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float2 tcs, float slice, float lod = 0.0 ) \
{ \
[unroll] for( uint i = 0; i < _Tex2DArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
return SAMPLE_TEXTURE2D_ARRAY_LOD( ctxt.tex2DArray[i], ctxt.samplers[j], tcs, slice, lod ); \
} \
} \
} \
return 1.0; \
} \
\
float4 SampleCompShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float4 tcs, float cubeIdx ) \
{ \
[unroll] for( uint i = 0; i < _TexCubeArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerCompSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
return SAMPLE_TEXTURECUBE_ARRAY_SHADOW( ctxt.texCubeArray[i], ctxt.compSamplers[j], tcs, cubeIdx ); \
} \
} \
} \
return 1.0; \
} \
\
float4 SampleShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float cubeIdx, float lod = 0.0 ) \
{ \
[unroll] for( uint i = 0; i < _TexCubeArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
return SAMPLE_TEXTURECUBE_ARRAY_LOD( ctxt.texCubeArray[i], ctxt.samplers[j], tcs, cubeIdx, lod ); \
} \
} \
} \
return 1.0; \
# define SHADOW_DEFINE_SAMPLING_FUNC_T2DA_COMP( _Tex2DArraySlots, _SamplerCompSlots ) \
float4 SampleCompShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float slice ) \
{ \
float4 res = 1.0.xxxx; \
[unroll] for( uint i = 0; i < _Tex2DArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerCompSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
res = SAMPLE_TEXTURE2D_ARRAY_SHADOW( ctxt.tex2DArray[i], ctxt.compSamplers[j], tcs, slice ); \
break; \
} \
} \
} \
return res; \
}
# define SHADOW_DEFINE_SAMPLING_FUNC_T2DA_SAMP( _Tex2DArraySlots, _SamplerSlots ) \
float4 SampleShadow_T2DA( ShadowContext ctxt, uint texIdx, uint sampIdx, float2 tcs, float slice, float lod = 0.0 ) \
{ \
float4 res = 1.0.xxxx; \
[unroll] for( uint i = 0; i < _Tex2DArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
res = SAMPLE_TEXTURE2D_ARRAY_LOD( ctxt.tex2DArray[i], ctxt.samplers[j], tcs, slice, lod ); \
break; \
} \
} \
} \
return res; \
}
# define SHADOW_DEFINE_SAMPLING_FUNC_TCA_COMP( _TexCubeArraySlots, _SamplerCompSlots ) \
float4 SampleCompShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float4 tcs, float cubeIdx ) \
{ \
float4 res = 1.0.xxxx; \
[unroll] for( uint i = 0; i < _TexCubeArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerCompSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
res = SAMPLE_TEXTURECUBE_ARRAY_SHADOW( ctxt.texCubeArray[i], ctxt.compSamplers[j], tcs, cubeIdx ); \
break; \
} \
} \
} \
return res; \
}
# define SHADOW_DEFINE_SAMPLING_FUNC_TCA_SAMP( _TexCubeArraySlots, _SamplerSlots ) \
float4 SampleShadow_TCA( ShadowContext ctxt, uint texIdx, uint sampIdx, float3 tcs, float cubeIdx, float lod = 0.0 ) \
{ \
float4 res = 1.0.xxxx; \
[unroll] for( uint i = 0; i < _TexCubeArraySlots; i++ ) \
{ \
[unroll] for( uint j = 0; j < _SamplerSlots; j++ ) \
{ \
[branch] if( i == texIdx && j == sampIdx ) \
{ \
res = SAMPLE_TEXTURECUBE_ARRAY_LOD( ctxt.texCubeArray[i], ctxt.samplers[j], tcs, cubeIdx, lod ); \
break; \
} \
} \
} \
return res; \
#endif
#endif // SHADOW_SUPPORTS_DYNAMIC_INDEXING != 0
// helper macro to suppress code generation if _cnt is 0
#define SHADOW_CHECK_0( _macro )
#define SHADOW_CHECK_1( _macro ) _macro
#define SHADOW_CHECK_2( _macro ) _macro
#define SHADOW_CHECK_3( _macro ) _macro
#define SHADOW_CHECK_4( _macro ) _macro
#define SHADOW_CHECK_5( _macro ) _macro
#define SHADOW_CHECK_6( _macro ) _macro
#define SHADOW_CHECK_7( _macro ) _macro
#define SHADOW_CHECK_8( _macro ) _macro
#define SHADOW_CHECK_9( _macro ) _macro
#define SHADOW_CHECK( _cnt, _macro ) MERGE_NAME( SHADOW_CHECK_ , _cnt ) ( _macro )
// helper macro to declare texture members for the shadow context.
#define SHADOWCONTEXT_DECLARE_TEXTURES( _Tex2DArraySlots, _TexCubeArraySlots, _SamplerCompSlots, _SamplerSlots ) \
SHADOW_CHECK( _Tex2DArraySlots , Texture2DArray tex2DArray[_Tex2DArraySlots]; ) \
SHADOW_CHECK( _TexCubeArraySlots, TextureCubeArray texCubeArray[_Tex2DArraySlots]; ) \
SHADOW_CHECK( _SamplerCompSlots , SamplerComparisonState compSamplers[_Tex2DArraySlots]; ) \
SHADOW_CHECK( _SamplerSlots , SamplerState samplers[_Tex2DArraySlots]; )
// helper macro to declare texture sampling functions for the shadow context.
#define SHADOW_DEFINE_SAMPLING_FUNCS( _Tex2DArraySlots, _TexCubeArraySlots, _SamplerCompSlots, _SamplerSlots ) \
SHADOW_CHECK( _Tex2DArraySlots , SHADOW_CHECK( _SamplerCompSlots, SHADOW_DEFINE_SAMPLING_FUNC_T2DA_COMP( _Tex2DArraySlots, _SamplerCompSlots ) ) ) \
SHADOW_CHECK( _Tex2DArraySlots , SHADOW_CHECK( _SamplerSlots , SHADOW_DEFINE_SAMPLING_FUNC_T2DA_SAMP( _Tex2DArraySlots, _SamplerSlots ) ) ) \
SHADOW_CHECK( _TexCubeArraySlots, SHADOW_CHECK( _SamplerCompSlots, SHADOW_DEFINE_SAMPLING_FUNC_TCA_COMP(_TexCubeArraySlots, _SamplerCompSlots ) ) ) \
SHADOW_CHECK( _TexCubeArraySlots, SHADOW_CHECK( _SamplerSlots , SHADOW_DEFINE_SAMPLING_FUNC_TCA_SAMP(_TexCubeArraySlots, _SamplerSlots ) ) )
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