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Fix SSR accumulation white flash #4648

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Merged
merged 3 commits into from
May 26, 2021
Merged

Fix SSR accumulation white flash #4648

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78cb731
Fix white flash
FrancescoC-unity May 26, 2021
d5561b1
changelog
FrancescoC-unity May 26, 2021
b8a0dbd
Merge branch 'hd/bugfix' into HDRP/fix-accumulation-white-flash
sebastienlagarde May 26, 2021
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1 change: 1 addition & 0 deletions com.unity.render-pipelines.high-definition/CHANGELOG.md
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Expand Up @@ -202,6 +202,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
- Fixed HDRP's ShaderGraphVersion migration management which was broken.
- Fixed missing API documentation for LTC area light code.
- Fixed AxF debug output in certain configurations (case 1333780).
- Fixed white flash when camera is reset and SSR Accumulation mode is on.

### Changed
- Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard
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2 changes: 2 additions & 0 deletions com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Camera/HDCamera.cs
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Expand Up @@ -94,6 +94,7 @@ public struct ViewConstants
public bool volumetricHistoryIsValid = false;

internal int volumetricValidFrames = 0;
internal int colorPyramidHistoryValidFrames = 0;

/// <summary>Width actually used for rendering after dynamic resolution and XR is applied.</summary>
public int actualWidth { get; private set; }
Expand Down Expand Up @@ -147,6 +148,7 @@ public void Reset()
volumetricHistoryIsValid = false;
volumetricValidFrames = 0;
colorPyramidHistoryIsValid = false;
colorPyramidHistoryValidFrames = 0;
dofHistoryIsValid = false;

// Reset the volumetric cloud offset animation data
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45 changes: 30 additions & 15 deletions ...ity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.LightLoop.cs
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Expand Up @@ -403,6 +403,7 @@ class RenderSSRPassData
public bool usePBRAlgo;
public bool accumNeedClear;
public bool previousAccumNeedClear;
public bool validColorPyramid;

public int width, height, viewCount;

Expand Down Expand Up @@ -511,6 +512,7 @@ TextureHandle RenderSSR(RenderGraph renderGraph,
passData.accumNeedClear = usePBRAlgo;
passData.previousAccumNeedClear = usePBRAlgo && (hdCamera.currentSSRAlgorithm == ScreenSpaceReflectionAlgorithm.Approximation || hdCamera.isFirstFrame || hdCamera.resetPostProcessingHistory);
hdCamera.currentSSRAlgorithm = volumeSettings.usedAlgorithm.value; // Store for next frame comparison
passData.validColorPyramid = hdCamera.colorPyramidHistoryValidFrames > 1;

passData.depthBuffer = builder.ReadTexture(prepassOutput.depthBuffer);
passData.depthPyramid = builder.ReadTexture(prepassOutput.depthPyramidTexture);
Expand Down Expand Up @@ -603,22 +605,30 @@ TextureHandle RenderSSR(RenderGraph renderGraph,

if (data.usePBRAlgo)
{
using (new ProfilingScope(ctx.cmd, ProfilingSampler.Get(HDProfileId.SsrAccumulate)))
if (!data.validColorPyramid)
{
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._DepthTexture, data.depthBuffer);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._CameraDepthTexture, data.depthPyramid);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._ColorPyramidTexture, data.colorPyramid);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrHitPointTexture, data.hitPointsTexture);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SSRAccumTexture, data.ssrAccum);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrLightingTextureRW, data.lightingTexture);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrAccumPrev, data.ssrAccumPrev);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrClearCoatMaskTexture, data.clearCoatMask);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._CameraMotionVectorsTexture, data.motionVectorsBuffer);

ConstantBuffer.Push(ctx.cmd, data.cb, cs, HDShaderIDs._ShaderVariablesScreenSpaceReflection);

ctx.cmd.DispatchCompute(cs, data.accumulateKernel, HDUtils.DivRoundUp(data.width, 8), HDUtils.DivRoundUp(data.height, 8), data.viewCount);
CoreUtils.SetRenderTarget(ctx.cmd, data.ssrAccum, ClearFlag.Color, Color.clear);
CoreUtils.SetRenderTarget(ctx.cmd, data.ssrAccumPrev, ClearFlag.Color, Color.clear);
}
else
{
using (new ProfilingScope(ctx.cmd, ProfilingSampler.Get(HDProfileId.SsrAccumulate)))
{
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._DepthTexture, data.depthBuffer);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._CameraDepthTexture, data.depthPyramid);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._ColorPyramidTexture, data.colorPyramid);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrHitPointTexture, data.hitPointsTexture);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SSRAccumTexture, data.ssrAccum);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrLightingTextureRW, data.lightingTexture);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrAccumPrev, data.ssrAccumPrev);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._SsrClearCoatMaskTexture, data.clearCoatMask);
ctx.cmd.SetComputeTextureParam(cs, data.accumulateKernel, HDShaderIDs._CameraMotionVectorsTexture, data.motionVectorsBuffer);

ConstantBuffer.Push(ctx.cmd, data.cb, cs, HDShaderIDs._ShaderVariablesScreenSpaceReflection);

ctx.cmd.DispatchCompute(cs, data.accumulateKernel, HDUtils.DivRoundUp(data.width, 8), HDUtils.DivRoundUp(data.height, 8), data.viewCount);
}
}
}
});
Expand All @@ -639,8 +649,13 @@ TextureHandle RenderSSR(RenderGraph renderGraph,
if (!hdCamera.colorPyramidHistoryIsValid)
{
hdCamera.colorPyramidHistoryIsValid = true; // For the next frame...
hdCamera.colorPyramidHistoryValidFrames = 0;
result = renderGraph.defaultResources.blackTextureXR;
}
else
{
hdCamera.colorPyramidHistoryValidFrames++;
}
}

PushFullScreenDebugTexture(renderGraph, result, transparent ? FullScreenDebugMode.TransparentScreenSpaceReflections : FullScreenDebugMode.ScreenSpaceReflections);
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