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Optimized cascade selection code to reduce register usage. 

Added additional texture size parameter to tent filters to avoid rcp calculations using up registers.
Removed unused scale parameter from directional light payloads.
/main
uygar 6 年前
当前提交
775d3f32
共有 6 个文件被更改，包括 112 次插入 和 174 次删除
  1. 190
      ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Shadow/ShadowAlgorithms.hlsl
  2. 44
      ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Shadow/ShadowSampling.hlsl
  3. 16
      ScriptableRenderPipeline/Core/CoreRP/Shadow/Shadow.cs
  4. 2
      ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/DeferredDirectionalShadow.compute
  5. 26
      ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/LightLoop/LightLoop.hlsl
  6. 8
      ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightShaderLibrary.meta

190
ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Shadow/ShadowAlgorithms.hlsl
查看文件


#define kMaxShadowCascades 4
#define SHADOW_REPEAT_CASCADE( _x ) _x, _x, _x, _x
int EvalShadow_GetSplitSphereIndexForDirshadows( real3 positionWS, real4 dirShadowSplitSpheres[4], out real relDistance )
{
real3 fromCenter0 = positionWS.xyz - dirShadowSplitSpheres[0].xyz;
real3 fromCenter1 = positionWS.xyz - dirShadowSplitSpheres[1].xyz;
real3 fromCenter2 = positionWS.xyz - dirShadowSplitSpheres[2].xyz;
real3 fromCenter3 = positionWS.xyz - dirShadowSplitSpheres[3].xyz;
real4 distances2 = real4(dot(fromCenter0, fromCenter0), dot(fromCenter1, fromCenter1), dot(fromCenter2, fromCenter2), dot(fromCenter3, fromCenter3));
real4 dirShadowSplitSphereSqRadii;
dirShadowSplitSphereSqRadii.x = dirShadowSplitSpheres[0].w;
dirShadowSplitSphereSqRadii.y = dirShadowSplitSpheres[1].w;
dirShadowSplitSphereSqRadii.z = dirShadowSplitSpheres[2].w;
dirShadowSplitSphereSqRadii.w = dirShadowSplitSpheres[3].w;
real4 weights = real4( distances2 < dirShadowSplitSphereSqRadii );
weights.yzw = saturate( weights.yzw - weights.xyz );
int idx = int( 4.0 - dot( weights, real4( 4.0, 3.0, 2.0, 1.0 ) ) );
relDistance = distances2[idx] / dirShadowSplitSphereSqRadii[idx];
return idx <= 3 ? idx : -1;
}
int EvalShadow_GetSplitSphereIndexForDirshadows( real3 positionWS, real4 dirShadowSplitSpheres[4] )
{
real relDist;
return EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDist );
}
uint EvalShadow_LoadSplitSpheres( ShadowContext shadowContext, int index, out real4 splitSpheres[4] )
{
uint offset = GetPayloadOffset( shadowContext.shadowDatas[index] );
splitSpheres[0] = asfloat( shadowContext.payloads[offset + 0] );
splitSpheres[1] = asfloat( shadowContext.payloads[offset + 1] );
splitSpheres[2] = asfloat( shadowContext.payloads[offset + 2] );
splitSpheres[3] = asfloat( shadowContext.payloads[offset + 3] );
return offset + 4;
}
void EvalShadow_LoadCascadeData( ShadowContext shadowContext, uint index, inout ShadowData sd )
{
sd.shadowToWorld = shadowContext.shadowDatas[index].shadowToWorld;

sd.viewBias.w = shadowContext.shadowDatas[index].viewBias.w;
}
int EvalShadow_GetSplitIndex( ShadowContext shadowContext, int index, real3 positionWS, out uint payloadOffset, out real alpha )
{
payloadOffset = shadowContext.shadowDatas[index].payloadOffset;
int i = 0;
real relDistance = 0.0;
real3 wposDir, splitSphere;
// find the current cascade
for( ; i < kMaxShadowCascades; i++, payloadOffset++ )
{
float4 sphere = asfloat( shadowContext.payloads[payloadOffset] );
wposDir = -sphere.xyz + positionWS;
float distSq = dot( wposDir, wposDir );
relDistance = distSq / sphere.w;
if( relDistance <= 1.0 )
{
splitSphere = sphere.xyz;
wposDir /= sqrt( distSq );
break;
}
}
int shadowSplitIndex = i < kMaxShadowCascades ? i : -1;
payloadOffset = shadowContext.shadowDatas[index].payloadOffset + kMaxShadowCascades;
real3 cascadeDir = asfloat( shadowContext.payloads[payloadOffset].xyz );
payloadOffset++;
real border = asfloat( shadowContext.payloads[payloadOffset][shadowSplitIndex] );
payloadOffset++;
alpha = border <= 0.0 ? 0.0 : saturate( (relDistance - (1.0 - border)) / border );
real cascDot = dot( cascadeDir, wposDir );
alpha = cascDot > 0.0 ? alpha : lerp( alpha, 0.0, saturate( -cascDot * 4.0 ) );
return shadowSplitIndex;
}
real4 dirShadowSplitSpheres[4];
uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, index, dirShadowSplitSpheres );
real relDistance;
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDistance );
uint payloadOffset;
real alpha;
int shadowSplitIndex = EvalShadow_GetSplitIndex( shadowContext, index, positionWS, payloadOffset, alpha );
real4 scales = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
real4 borders = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
real border = borders[shadowSplitIndex];
real alpha = border <= 0.0 ? 0.0 : saturate( (relDistance - (1.0 - border)) / border );
ShadowData sd = shadowContext.shadowDatas[index];
EvalShadow_LoadCascadeData( shadowContext, index + 1 + shadowSplitIndex, sd );

uint orig_payloadOffset = payloadOffset;
real recvBiasWeight = EvalShadow_ReceiverBiasWeight( shadowContext, shadowAlgorithm, sd, texIdx, sampIdx, positionWS, normalWS, L, 1.0, false );
positionWS = EvalShadow_ReceiverBias( sd, positionWS, normalWS, L, 1.0, recvBiasWeight, false );
// Be careful of this code, we need it here before the if statement otherwise the compiler screws up optimizing dirShadowSplitSpheres VGPRs away
real3 splitSphere = dirShadowSplitSpheres[shadowSplitIndex].xyz;
real3 cascadeDir = normalize( -splitSphere + dirShadowSplitSpheres[min( shadowSplitIndex+1, kMaxShadowCascades-1 )].xyz );
real3 wposDir = normalize( -splitSphere + positionWS );
real cascDot = dot( cascadeDir, wposDir );
alpha = cascDot > 0.0 ? alpha : lerp( alpha, 0.0, saturate( -cascDot * 4.0 ) );
// evaluate the first cascade
real2 sampleBias = EvalShadow_SampleBias_Ortho( sd, normalWS );
real shadow = SampleShadow_SelectAlgorithm( shadowContext, sd, payloadOffset, posTC, sampleBias, shadowAlgorithm, texIdx, sampIdx );

return shadow;
}
/* load the right shadow data for the current face */ \
real4 dirShadowSplitSpheres[kMaxShadowCascades]; \
uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, index, dirShadowSplitSpheres ); \
real relDistance; \
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDistance ); \
uint payloadOffset; \
real alpha; \
int shadowSplitIndex = EvalShadow_GetSplitIndex(shadowContext, index, positionWS, payloadOffset, alpha ); \
\
real4 scales = asfloat( shadowContext.payloads[payloadOffset] ); \
payloadOffset++; \
real4 borders = asfloat( shadowContext.payloads[payloadOffset] ); \
payloadOffset++; \
real border = borders[shadowSplitIndex]; \
real alpha = border <= 0.0 ? 0.0 : saturate( (relDistance - (1.0 - border)) / border ); \
\
ShadowData sd = shadowContext.shadowDatas[index]; \
EvalShadow_LoadCascadeData( shadowContext, index + 1 + shadowSplitIndex, sd ); \
\

real recvBiasWeight = EvalShadow_ReceiverBiasWeight( sd, tex, samp, positionWS, normalWS, L, 1.0, false ); \
positionWS = EvalShadow_ReceiverBias( sd, positionWS, normalWS, L, 1.0, recvBiasWeight, false ); \
/* Be careful of this code, we need it here before the if statement otherwise the compiler screws up optimizing dirShadowSplitSpheres VGPRs away */ \
real3 splitSphere = dirShadowSplitSpheres[shadowSplitIndex].xyz; \
real3 cascadeDir = normalize( -splitSphere + dirShadowSplitSpheres[min( shadowSplitIndex+1, kMaxShadowCascades-1 )].xyz ); \
real3 wposDir = normalize( -splitSphere + positionWS ); \
real cascDot = dot( cascadeDir, wposDir ); \
alpha = cascDot > 0.0 ? alpha : lerp( alpha, 0.0, saturate( -cascDot * 4.0 ) ); \
\
/* get shadowmap texcoords */ \
real3 posNDC; \

real EvalShadow_CascadedDepth_Dither( ShadowContext shadowContext, real3 positionWS, real3 normalWS, int index, real3 L )
{
// load the right shadow data for the current face
real4 dirShadowSplitSpheres[kMaxShadowCascades];
uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, index, dirShadowSplitSpheres );
real relDistance;
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDistance );
uint payloadOffset;
real alpha;
int shadowSplitIndex = EvalShadow_GetSplitIndex(shadowContext, index, positionWS, payloadOffset, alpha);
real4 scales = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
real4 borders = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
real border = borders[shadowSplitIndex];
real alpha = border <= 0.0 ? 0.0 : saturate( (relDistance - (1.0 - border)) / border );
ShadowData sd = shadowContext.shadowDatas[index];
EvalShadow_LoadCascadeData( shadowContext, index + 1 + shadowSplitIndex, sd );

real3 posNDC;
real3 posTC = EvalShadow_GetTexcoords( sd, positionWS, posNDC, true, false );
int nextSplit = min( shadowSplitIndex+1, kMaxShadowCascades-1 );
real3 splitSphere = dirShadowSplitSpheres[shadowSplitIndex].xyz;
real3 cascadeDir = normalize( -splitSphere + dirShadowSplitSpheres[min( 3, shadowSplitIndex + 1 )].xyz );
real3 wposDir = normalize( -splitSphere + positionWS );
real cascDot = dot( cascadeDir, wposDir );
alpha = cascDot > 0.0 ? alpha : lerp( alpha, 0.0, saturate( -cascDot * 4.0 ) );
int nextSplit = min( shadowSplitIndex+1, kMaxShadowCascades-1 );
if( shadowSplitIndex < nextSplit && step( EvalShadow_hash12( posTC.xy ), alpha ) )
{

real EvalShadow_CascadedDepth_Dither( ShadowContext shadowContext, uint shadowAlgorithms[kMaxShadowCascades], Texture2DArray tex, _samplerType samp, real3 positionWS, real3 normalWS, int index, real3 L ) \
{ \
/* load the right shadow data for the current face */ \
real4 dirShadowSplitSpheres[kMaxShadowCascades]; \
uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, index, dirShadowSplitSpheres ); \
real relDistance; \
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDistance ); \
uint payloadOffset; \
real alpha; \
int shadowSplitIndex = EvalShadow_GetSplitIndex(shadowContext, index, positionWS, payloadOffset, alpha ); \
\
real4 scales = asfloat( shadowContext.payloads[payloadOffset] ); \
payloadOffset++; \
real4 borders = asfloat( shadowContext.payloads[payloadOffset] ); \
payloadOffset++; \
real border = borders[shadowSplitIndex]; \
real alpha = border <= 0.0 ? 0.0 : saturate( (relDistance - (1.0 - border)) / border ); \
\
ShadowData sd = shadowContext.shadowDatas[index]; \
EvalShadow_LoadCascadeData( shadowContext, index + 1 + shadowSplitIndex, sd ); \
\

real3 posNDC; \
real3 posTC = EvalShadow_GetTexcoords( sd, positionWS, posNDC, true, false ); \
\
int nextSplit = min( shadowSplitIndex+1, kMaxShadowCascades-1 ); \
real3 splitSphere = dirShadowSplitSpheres[shadowSplitIndex].xyz; \
real3 cascadeDir = normalize( -splitSphere + dirShadowSplitSpheres[nextSplit].xyz ); \
real3 wposDir = normalize( -splitSphere + positionWS ); \
real cascDot = dot( cascadeDir, wposDir ); \
alpha = cascDot > 0.0 ? alpha : lerp( alpha, 0.0, saturate( -cascDot * 4.0 ) ); \
int nextSplit = min( shadowSplitIndex+1, kMaxShadowCascades-1 ); \
\
if( shadowSplitIndex != nextSplit && step( EvalShadow_hash12( posTC.xy ), alpha ) ) \
{ \

real3 EvalShadow_GetClosestSample_Cascade( ShadowContext shadowContext, real3 positionWS, real3 normalWS, int index, real4 L )
{
// load the right shadow data for the current face
real4 dirShadowSplitSpheres[4];
uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, index, dirShadowSplitSpheres );
real relDistance;
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDistance );
uint payloadOffset;
real alpha;
int shadowSplitIndex = EvalShadow_GetSplitIndex( shadowContext, index, positionWS, payloadOffset, alpha );
real4 scales = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
real4 borders = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
ShadowData sd = shadowContext.shadowDatas[index + 1 + shadowSplitIndex];

real3 EvalShadow_GetClosestSample_Cascade( ShadowContext shadowContext, Texture2DArray tex, real3 positionWS, real3 normalWS, int index, real4 L )
{
// load the right shadow data for the current face
real4 dirShadowSplitSpheres[4];
uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, index, dirShadowSplitSpheres );
real relDistance;
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres, relDistance );
uint payloadOffset;
real alpha;
int shadowSplitIndex = EvalShadow_GetSplitIndex( shadowContext, index, positionWS, payloadOffset, alpha );
real4 scales = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
real4 borders = asfloat( shadowContext.payloads[payloadOffset] );
payloadOffset++;
ShadowData sd = shadowContext.shadowDatas[index + 1 + shadowSplitIndex];

44
ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Shadow/ShadowSampling.hlsl
查看文件


//
// 3x3 tent PCF sampling (4 taps)
//
real SampleShadow_PCF_Tent_3x3( ShadowContext shadowContext, inout uint payloadOffset, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, uint texIdx, uint sampIdx )
real SampleShadow_PCF_Tent_3x3( ShadowContext shadowContext, inout uint payloadOffset, real4 textureSize, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, uint texIdx, uint sampIdx )
// TODO move this to shadow data to avoid the rcp?
real4 shadowMapTexture_TexelSize = real4(texelSizeRcp.xy, rcp(texelSizeRcp.xy));
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, textureSize.xy );
// add the depth bias
coord.z += depthBias;

return shadow;
}
real SampleShadow_PCF_Tent_3x3(ShadowContext shadowContext, inout uint payloadOffset, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, Texture2DArray tex, SamplerComparisonState compSamp )
real SampleShadow_PCF_Tent_3x3(ShadowContext shadowContext, inout uint payloadOffset, real4 textureSize, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, Texture2DArray tex, SamplerComparisonState compSamp )
// TODO move this to shadow data to avoid the rcp?
real4 shadowMapTexture_TexelSize = real4(texelSizeRcp.xy, rcp(texelSizeRcp.xy));
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, textureSize.xy );
// add the depth bias
coord.z += depthBias;

//
// 5x5 tent PCF sampling (9 taps)
//
real SampleShadow_PCF_Tent_5x5( ShadowContext shadowContext, inout uint payloadOffset, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, uint texIdx, uint sampIdx )
real SampleShadow_PCF_Tent_5x5( ShadowContext shadowContext, inout uint payloadOffset, real4 textureSize, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, uint texIdx, uint sampIdx )
// TODO move this to shadow data to avoid the rcp?
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, rcp( texelSizeRcp.xy ) );
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, textureSize.xy );
// add the depth bias
coord.z += depthBias;

return shadow;
}
real SampleShadow_PCF_Tent_5x5(ShadowContext shadowContext, inout uint payloadOffset, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, Texture2DArray tex, SamplerComparisonState compSamp )
real SampleShadow_PCF_Tent_5x5(ShadowContext shadowContext, inout uint payloadOffset, real4 textureSize, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, Texture2DArray tex, SamplerComparisonState compSamp )
// TODO move this to shadow data to avoid the rcp
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, rcp(texelSizeRcp.xy ) );
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, textureSize.xy );
// add the depth bias
coord.z += depthBias;

#if SHADOW_OPTIMIZE_REGISTER_USAGE == 1
// the loops are only there to prevent the compiler form coalescing all 16 texture fetches which increases register usage
// the loops are only there to prevent the compiler form coalescing all 9 texture fetches which increases register usage
int i;
[loop]
for( i = 0; i < 1; i++ )

//
// 7x7 tent PCF sampling (16 taps)
//
real SampleShadow_PCF_Tent_7x7( ShadowContext shadowContext, inout uint payloadOffset, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, uint texIdx, uint sampIdx )
real SampleShadow_PCF_Tent_7x7( ShadowContext shadowContext, inout uint payloadOffset, real4 textureSize, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, uint texIdx, uint sampIdx )
// TODO move this to shadow data to avoid the rcp
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, rcp(texelSizeRcp.xy ) );
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, textureSize.xy );
// add the depth bias
coord.z += depthBias;

return shadow;
}
real SampleShadow_PCF_Tent_7x7(ShadowContext shadowContext, inout uint payloadOffset, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, Texture2DArray tex, SamplerComparisonState compSamp )
real SampleShadow_PCF_Tent_7x7(ShadowContext shadowContext, inout uint payloadOffset, real4 textureSize, real4 texelSizeRcp, real3 coord, real2 sampleBias, float slice, Texture2DArray tex, SamplerComparisonState compSamp )
// TODO move this to shadow data to avoid the rcp
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, rcp( texelSizeRcp.xy ) );
real4 shadowMapTexture_TexelSize = real4( texelSizeRcp.xy, textureSize.xy );
// add the depth bias
coord.z += depthBias;

{
case GPUSHADOWALGORITHM_PCF_1TAP : return SampleShadow_PCF_1tap( shadowContext, payloadOffset, posTC, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_9TAP : return SampleShadow_PCF_9tap_Adaptive( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_TENT_3X3 : return SampleShadow_PCF_Tent_3x3( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_TENT_5X5 : return SampleShadow_PCF_Tent_5x5( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_TENT_7X7 : return SampleShadow_PCF_Tent_7x7( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_TENT_3X3 : return SampleShadow_PCF_Tent_3x3( shadowContext, payloadOffset, shadowData.textureSize, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_TENT_5X5 : return SampleShadow_PCF_Tent_5x5( shadowContext, payloadOffset, shadowData.textureSize, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_PCF_TENT_7X7 : return SampleShadow_PCF_Tent_7x7( shadowContext, payloadOffset, shadowData.textureSize, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_VSM : return SampleShadow_VSM_1tap( shadowContext, payloadOffset, posTC, shadowData.slice, texIdx, sampIdx );
case GPUSHADOWALGORITHM_EVSM_2 : return SampleShadow_EVSM_1tap( shadowContext, payloadOffset, posTC, shadowData.slice, texIdx, sampIdx, false );
case GPUSHADOWALGORITHM_EVSM_4 : return SampleShadow_EVSM_1tap( shadowContext, payloadOffset, posTC, shadowData.slice, texIdx, sampIdx, true );

{
case GPUSHADOWALGORITHM_PCF_1TAP : return SampleShadow_PCF_1tap( shadowContext, payloadOffset, posTC, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_9TAP : return SampleShadow_PCF_9tap_Adaptive( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_TENT_3X3 : return SampleShadow_PCF_Tent_3x3( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_TENT_5X5 : return SampleShadow_PCF_Tent_5x5( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_TENT_7X7 : return SampleShadow_PCF_Tent_7x7( shadowContext, payloadOffset, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_TENT_3X3 : return SampleShadow_PCF_Tent_3x3( shadowContext, payloadOffset, shadowData.textureSize, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_TENT_5X5 : return SampleShadow_PCF_Tent_5x5( shadowContext, payloadOffset, shadowData.textureSize, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
case GPUSHADOWALGORITHM_PCF_TENT_7X7 : return SampleShadow_PCF_Tent_7x7( shadowContext, payloadOffset, shadowData.textureSize, shadowData.texelSizeRcp, posTC, sampleBias, shadowData.slice, tex, compSamp );
default: return 1.0;
}

16
ScriptableRenderPipeline/Core/CoreRP/Shadow/Shadow.cs
查看文件


protected uint[] m_TmpWidths = new uint[ShadowmapBase.ShadowRequest.k_MaxFaceCount];
protected uint[] m_TmpHeights = new uint[ShadowmapBase.ShadowRequest.k_MaxFaceCount];
protected Vector4[] m_TmpSplits = new Vector4[k_MaxCascadesInShader];
protected float[] m_TmpScales = new float[((k_MaxCascadesInShader+3)/4)*4];
protected float[] m_TmpBorders = new float[((k_MaxCascadesInShader+3)/4)*4];
protected ShadowAlgoVector m_SupportedAlgorithms = new ShadowAlgoVector( 0, false );
protected Material m_DebugMaterial = null;

int face = (int)key.faceIdx;
texelSizeX = 2.0f / ce.current.proj.m00;
texelSizeY = 2.0f / ce.current.proj.m11;
m_TmpScales[face] = Mathf.Max( texelSizeX, texelSizeY );
m_TmpBorders[face] = cascadeBorders[face];
m_TmpSplits[key.faceIdx].w *= ce.current.splitData.cullingSphere.w;
}

// Returns how many entries will be written into the payload buffer per light.
virtual protected uint ReservePayload( ShadowRequest sr )
{
uint payloadSize = sr.shadowType == GPUShadowType.Directional ? (k_MaxCascadesInShader + ((uint)m_TmpScales.Length / 4) + ((uint)m_TmpBorders.Length / 4)) : 0;
uint payloadSize = sr.shadowType == GPUShadowType.Directional ? (1 + k_MaxCascadesInShader + ((uint)m_TmpBorders.Length / 4)) : 0;
payloadSize += ShadowUtils.ExtractAlgorithm( sr.shadowAlgorithm ) == ShadowAlgorithm.PCF ? 1u : 0;
return payloadSize;
}

ShadowPayload sp = new ShadowPayload();
if( sr.shadowType == GPUShadowType.Directional )
{
uint first = k_MaxCascadesInShader, second = k_MaxCascadesInShader;
first = (first == k_MaxCascadesInShader && m_TmpSplits[i].w > 0.0f) ? i : first;
second = (second == k_MaxCascadesInShader && m_TmpSplits[i].w > 0.0f) ? i : second;
for( int i = 0; i < m_TmpScales.Length; i += 4 )
{
sp.Set( m_TmpScales[i+0], m_TmpScales[i+1], m_TmpScales[i+2], m_TmpScales[i+3] );
payload[payloadOffset] = sp;
payloadOffset++;
}
sp.Set( (m_TmpSplits[second] - m_TmpSplits[first]).normalized );
payload[payloadOffset] = sp;
payloadOffset++;
for( int i = 0; i < m_TmpBorders.Length; i += 4 )
{

2
ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/DeferredDirectionalShadow.compute
查看文件


uint2 pixelCoord = groupId * DEFERRED_SHADOW_TILE_SIZE + groupThreadId;
uint2 tileCoord = groupId;
float depth = LOAD_TEXTURE2D(_MainDepthTexture, pixelCoord.xy).x;
float depth = LOAD_TEXTURE2D(_MainDepthTexture, pixelCoord.xy).x;
if (depth == UNITY_RAW_FAR_CLIP_VALUE)
return;

26
ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/LightLoop/LightLoop.hlsl
查看文件


float3(1.0, 0.0, 0.0),
float3(0.0, 1.0, 0.0),
float3(0.0, 0.0, 1.0),
float3(1.0, 1.0, 0.0)
float3(1.0, 1.0, 0.0),
float3(1.0, 1.0, 1.0)
float shadow = GetDirectionalShadowAttenuation(lightLoopContext.shadowContext, positionWS, float3(0.0, 1.0, 0.0 ), 0, float3(0.0, 0.0, 0.0), float2(0.0, 0.0));
float4 dirShadowSplitSpheres[4];
uint payloadOffset = EvalShadow_LoadSplitSpheres(lightLoopContext.shadowContext, 0, dirShadowSplitSpheres);
int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows(positionWS, dirShadowSplitSpheres);
if (shadowSplitIndex == -1)
{
diffuseLighting = float3(0.0, 0.0, 0.0);
}
else
diffuseLighting = float3(0.0, 0.0, 0.0);
if (_DirectionalLightCount > 0)
diffuseLighting = s_CascadeColors[shadowSplitIndex] * shadow;
int shadowIdx = _DirectionalLightDatas[0].shadowIndex;
float shadow = GetDirectionalShadowAttenuation(lightLoopContext.shadowContext, positionWS, float3(0.0, 1.0, 0.0 ), shadowIdx, -_DirectionalLightDatas[0].forward, float2(0.0, 0.0));
uint payloadOffset;
real alpha;
int shadowSplitIndex = EvalShadow_GetSplitIndex(lightLoopContext.shadowContext, shadowIdx, positionWS, payloadOffset, alpha);
if (shadowSplitIndex >= 0)
{
diffuseLighting = lerp(s_CascadeColors[shadowSplitIndex], s_CascadeColors[shadowSplitIndex+1], alpha) * shadow;
}
}
}
#endif

8
ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightShaderLibrary.meta
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