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[gfx-shadows] tents filters use loops for code clarity

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FlorentGuinier 7 年前
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8e9a6d75
共有 1 个文件被更改，包括 34 次插入 和 68 次删除
  1. 102
      Assets/ScriptableRenderPipeline/ShaderLibrary/Shadow/ShadowSampling.hlsl

102
Assets/ScriptableRenderPipeline/ShaderLibrary/Shadow/ShadowSampling.hlsl
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fetchesWeights[8] = fetchesWeightsU.z * fetchesWeightsV.z;
}
// 5x5 Tent filter (45 degree sloped triangles in U and V)
// 7x7 Tent filter (45 degree sloped triangles in U and V)
void SampleShadow_ComputeSamples_Tent_7x7(float4 shadowMapTexture_TexelSize, float2 coord, out float fetchesWeights[16], out float2 fetchesUV[16])
{
// tent base is 7x7 base thus covering from 49 to 64 texels, thus we need 16 bilinear PCF fetches

// add the depth bias
coord.z += depthBias;
half shadow = 1;
half shadow = 0;
shadow = fetchesWeights[0] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[0].xy, coord.z ), slice ).x;
shadow += fetchesWeights[1] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[1].xy, coord.z ), slice ).x;
shadow += fetchesWeights[2] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[2].xy, coord.z ), slice ).x;
shadow += fetchesWeights[3] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[3].xy, coord.z ), slice ).x;
for (int i = 0; i < 4; i++)
{
shadow += fetchesWeights[i] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[i].xy, coord.z ), slice ).x;
}
return shadow;
}

// add the depth bias
coord.z += depthBias;
half shadow = 1;
half shadow = 0;
shadow = fetchesWeights[0] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[0].xy, coord.z ), slice ).x;
shadow += fetchesWeights[1] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[1].xy, coord.z ), slice ).x;
shadow += fetchesWeights[2] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[2].xy, coord.z ), slice ).x;
shadow += fetchesWeights[3] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[3].xy, coord.z ), slice ).x;
for (int i = 0; i < 4; i++)
{
shadow += fetchesWeights[i] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[i].xy, coord.z ), slice ).x;
}
return shadow;
}

// add the depth bias
coord.z += depthBias;
half shadow = 1;
half shadow = 0;
shadow = fetchesWeights[0] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[0].xy, coord.z ), slice ).x;
shadow += fetchesWeights[1] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[1].xy, coord.z ), slice ).x;
shadow += fetchesWeights[2] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[2].xy, coord.z ), slice ).x;
shadow += fetchesWeights[3] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[3].xy, coord.z ), slice ).x;
shadow += fetchesWeights[4] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[4].xy, coord.z ), slice ).x;
shadow += fetchesWeights[5] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[5].xy, coord.z ), slice ).x;
shadow += fetchesWeights[6] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[6].xy, coord.z ), slice ).x;
shadow += fetchesWeights[7] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[7].xy, coord.z ), slice ).x;
shadow += fetchesWeights[8] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[8].xy, coord.z ), slice ).x;
for (int i = 0; i < 9; i++)
{
shadow += fetchesWeights[i] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[i].xy, coord.z ), slice ).x;
}
return shadow;
}

float depthBias = params.x;
payloadOffset++;
// TODO move this to shadow data to avoid the rcp?
// TODO move this to shadow data to avoid the rcp
half shadow = 1;
half shadow = 0;
shadow = fetchesWeights[0] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[0].xy, coord.z ), slice ).x;
shadow += fetchesWeights[1] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[1].xy, coord.z ), slice ).x;
shadow += fetchesWeights[2] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[2].xy, coord.z ), slice ).x;
shadow += fetchesWeights[3] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[3].xy, coord.z ), slice ).x;
shadow += fetchesWeights[4] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[4].xy, coord.z ), slice ).x;
shadow += fetchesWeights[5] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[5].xy, coord.z ), slice ).x;
shadow += fetchesWeights[6] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[6].xy, coord.z ), slice ).x;
shadow += fetchesWeights[7] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[7].xy, coord.z ), slice ).x;
shadow += fetchesWeights[8] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[8].xy, coord.z ), slice ).x;
for (int i = 0; i < 9; i++)
{
shadow += fetchesWeights[i] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[i].xy, coord.z ), slice ).x;
}
return shadow;
}

float depthBias = params.x;
payloadOffset++;
// TODO move this to shadow data to avoid the rcp?
// TODO move this to shadow data to avoid the rcp
half shadow = 1;
half shadow = 0;
shadow = fetchesWeights[0] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[0].xy, coord.z ), slice ).x;
shadow += fetchesWeights[1] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[1].xy, coord.z ), slice ).x;
shadow += fetchesWeights[2] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[2].xy, coord.z ), slice ).x;
shadow += fetchesWeights[3] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[3].xy, coord.z ), slice ).x;
shadow += fetchesWeights[4] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[4].xy, coord.z ), slice ).x;
shadow += fetchesWeights[5] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[5].xy, coord.z ), slice ).x;
shadow += fetchesWeights[6] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[6].xy, coord.z ), slice ).x;
shadow += fetchesWeights[7] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[7].xy, coord.z ), slice ).x;
shadow += fetchesWeights[8] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[8].xy, coord.z ), slice ).x;
shadow += fetchesWeights[9] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[9].xy, coord.z ), slice ).x;
shadow += fetchesWeights[10] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[10].xy, coord.z ), slice ).x;
shadow += fetchesWeights[11] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[11].xy, coord.z ), slice ).x;
shadow += fetchesWeights[12] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[12].xy, coord.z ), slice ).x;
shadow += fetchesWeights[13] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[13].xy, coord.z ), slice ).x;
shadow += fetchesWeights[14] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[14].xy, coord.z ), slice ).x;
shadow += fetchesWeights[15] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[15].xy, coord.z ), slice ).x;
for (int i = 0; i < 16; i++)
{
shadow += fetchesWeights[i] * SampleCompShadow_T2DA( shadowContext, texIdx, sampIdx, float3( fetchesUV[i].xy, coord.z ), slice ).x;
}
return shadow;
}

float depthBias = params.x;
payloadOffset++;
// TODO move this to shadow data to avoid the rcp?
// TODO move this to shadow data to avoid the rcp
half shadow = 1;
half shadow = 0;
shadow = fetchesWeights[0] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[0].xy, coord.z ), slice ).x;
shadow += fetchesWeights[1] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[1].xy, coord.z ), slice ).x;
shadow += fetchesWeights[2] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[2].xy, coord.z ), slice ).x;
shadow += fetchesWeights[3] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[3].xy, coord.z ), slice ).x;
shadow += fetchesWeights[4] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[4].xy, coord.z ), slice ).x;
shadow += fetchesWeights[5] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[5].xy, coord.z ), slice ).x;
shadow += fetchesWeights[6] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[6].xy, coord.z ), slice ).x;
shadow += fetchesWeights[7] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[7].xy, coord.z ), slice ).x;
shadow += fetchesWeights[8] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[8].xy, coord.z ), slice ).x;
shadow += fetchesWeights[9] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[9].xy, coord.z ), slice ).x;
shadow += fetchesWeights[10] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[10].xy, coord.z ), slice ).x;
shadow += fetchesWeights[11] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[11].xy, coord.z ), slice ).x;
shadow += fetchesWeights[12] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[12].xy, coord.z ), slice ).x;
shadow += fetchesWeights[13] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[13].xy, coord.z ), slice ).x;
shadow += fetchesWeights[14] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[14].xy, coord.z ), slice ).x;
shadow += fetchesWeights[15] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[15].xy, coord.z ), slice ).x;
for (int i = 0; i < 16; i++)
{
shadow += fetchesWeights[i] * SAMPLE_TEXTURE2D_ARRAY_SHADOW( tex, compSamp, float3( fetchesUV[i].xy, coord.z ), slice ).x;
}
return shadow;
}

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