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ScriptableRenderPipeline
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re-arranged to prep for async compute and minor clean up 

re-arranged to prep for async compute and minor clean up
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mmikk 8 年前
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32eade55
共有 1 个文件被更改，包括 86 次插入 和 79 次删除
  1. 165
      Assets/ScriptableRenderLoop/fptl/FptlLighting.cs

165
Assets/ScriptableRenderLoop/fptl/FptlLighting.cs
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public bool enableDrawLightBoundsDebug = false;
public bool enableDrawTileDebug = false;
const bool k_UseDepthBuffer = true;// // only has an impact when EnableClustered is true (requires a depth-prepass)
const bool k_UseAsyncCompute = true; // should not use on mobile
const int k_Log2NumClusters = 6; // accepted range is from 0 to 6. NumClusters is 1<<g_iLog2NumClusters
const float k_ClustLogBase = 1.02f; // each slice 2% bigger than the previous

// do anything we need to do upon a new frame.
NewFrame ();
ShadowOutput shadows;
m_ShadowPass.Render(loop, cullResults, out shadows);
if(!k_UseAsyncCompute) RenderShadowMaps(cullResults, loop);
//m_DeferredMaterial.SetInt("_SrcBlend", camera.hdr ? (int)BlendMode.One : (int)BlendMode.DstColor);
//m_DeferredMaterial.SetInt("_DstBlend", camera.hdr ? (int)BlendMode.One : (int)BlendMode.Zero);
//m_DeferredReflectionMaterial.SetInt("_SrcBlend", camera.hdr ? (int)BlendMode.One : (int)BlendMode.DstColor);
//m_DeferredReflectionMaterial.SetInt("_DstBlend", camera.hdr ? (int)BlendMode.One : (int)BlendMode.Zero);
// generate g-buffer before shadows to leverage async compute
// forward opaques just write to depth.
UpdateShadowConstants (cullResults.visibleLights, ref shadows);
//@TODO: render forward-only objects into depth buffer
//@TODO: render reflection probes
//RenderLighting(camera, inputs, loop);
//
// camera to screen matrix (and it's inverse)
temp.SetRow(0, new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
temp.SetRow(1, new Vector4(0.0f, 1.0f, 0.0f, 0.0f));
temp.SetRow(2, new Vector4(0.0f, 0.0f, 0.5f, 0.5f));
temp.SetRow(3, new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
var projh = temp * proj;
var invProjh = projh.inverse;
temp.SetRow(0, new Vector4(0.5f * w, 0.0f, 0.0f, 0.5f * w));
temp.SetRow(1, new Vector4(0.0f, 0.5f * h, 0.0f, 0.5f * h));
temp.SetRow(2, new Vector4(0.0f, 0.0f, 0.5f, 0.5f));

// build per tile light lists
var numTilesX = (w + 15) / 16;
var numTilesY = (h + 15) / 16;
var numBigTilesX = (w + 63) / 64;
var numBigTilesY = (h + 63) / 64;
//ComputeBuffer lightList = new ComputeBuffer(nrTilesX * nrTilesY * (32 / 2), sizeof(uint));
var cmd = new CommandBuffer() { name = "Build light list" };
// generate screen-space AABBs (used for both fptl and clustered).
cmd.SetComputeIntParam(buildScreenAABBShader, "g_iNrVisibLights", numLights);
SetMatrixCS(cmd, buildScreenAABBShader, "g_mProjection", projh);
SetMatrixCS(cmd, buildScreenAABBShader, "g_mInvProjection", invProjh);
cmd.SetComputeBufferParam(buildScreenAABBShader, s_GenAABBKernel, "g_vBoundsBuffer", s_AABBBoundsBuffer);
cmd.DispatchCompute(buildScreenAABBShader, s_GenAABBKernel, (numLights + 7) / 8, 1, 1);
BuildPerTileLightLists(camera, loop, numLights, projscr, invProjscr);
// enable coarse 2D pass on 64x64 tiles.
if(enableBigTilePrepass)
{
cmd.SetComputeIntParams(buildPerBigTileLightListShader, "g_viDimensions", new int[2] { w, h });
cmd.SetComputeIntParam(buildPerBigTileLightListShader, "g_iNrVisibLights", numLights);
SetMatrixCS(cmd, buildPerBigTileLightListShader, "g_mScrProjection", projscr);
SetMatrixCS(cmd, buildPerBigTileLightListShader, "g_mInvScrProjection", invProjscr);
cmd.SetComputeFloatParam(buildPerBigTileLightListShader, "g_fNearPlane", camera.nearClipPlane);
cmd.SetComputeFloatParam(buildPerBigTileLightListShader, "g_fFarPlane", camera.farClipPlane);
cmd.SetComputeBufferParam(buildPerBigTileLightListShader, s_GenListPerBigTileKernel, "g_vLightList", s_BigTileLightList);
cmd.DispatchCompute(buildPerBigTileLightListShader, s_GenListPerBigTileKernel, numBigTilesX, numBigTilesY, 1);
}
if( UsingFptl() )
{
cmd.SetComputeIntParams(buildPerTileLightListShader, "g_viDimensions", new int[2] { w, h });
cmd.SetComputeIntParam(buildPerTileLightListShader, "g_iNrVisibLights", numLights);
SetMatrixCS(cmd, buildPerTileLightListShader, "g_mScrProjection", projscr);
SetMatrixCS(cmd, buildPerTileLightListShader, "g_mInvScrProjection", invProjscr);
cmd.SetComputeTextureParam(buildPerTileLightListShader, s_GenListPerTileKernel, "g_depth_tex", new RenderTargetIdentifier(s_CameraDepthTexture));
cmd.SetComputeBufferParam(buildPerTileLightListShader, s_GenListPerTileKernel, "g_vLightList", s_LightList);
if(enableBigTilePrepass) cmd.SetComputeBufferParam(buildPerTileLightListShader, s_GenListPerTileKernel, "g_vBigTileLightList", s_BigTileLightList);
cmd.DispatchCompute(buildPerTileLightListShader, s_GenListPerTileKernel, numTilesX, numTilesY, 1);
}
if (enableClustered)
{
VoxelLightListGeneration(cmd, camera, numLights, projscr, invProjscr);
}
loop.ExecuteCommandBuffer(cmd);
cmd.Dispose();
var numDirLights = UpdateDirectionalLights(camera, cullResults.visibleLights);
// render shadow maps (for mobile shadow map rendering should happen before we render g-buffer).
// on GCN it needs to be after to leverage async compute since we need the depth-buffer for optimal light list building.
if(k_UseAsyncCompute) RenderShadowMaps(cullResults, loop);
var numDirLights = UpdateDirectionalLights(camera, cullResults.visibleLights);
// render opaques using tiled forward
// render the backdrop/canvas
if(enableClustered) RenderForward(cullResults, camera, loop, false); // transparencies atm. requires clustered until we get traditional forward
// transparencies atm. requires clustered until we get traditional forward
if(enableClustered) RenderForward(cullResults, camera, loop, false);
// debug views.
// present frame buffer.
FinalPass(loop);
}

m_CookieTexArray.NewFrame();
m_CubeCookieTexArray.NewFrame();
m_CubeReflTexArray.NewFrame();
}
//m_DeferredMaterial.SetTexture("_spotCookieTextures", m_cookieTexArray.GetTexCache());
//m_DeferredMaterial.SetTexture("_pointCookieTextures", m_cubeCookieTexArray.GetTexCache());
//m_DeferredReflectionMaterial.SetTexture("_reflCubeTextures", m_cubeReflTexArray.GetTexCache());
void RenderShadowMaps(CullResults cullResults, RenderLoop loop)
{
ShadowOutput shadows;
m_ShadowPass.Render(loop, cullResults, out shadows);
UpdateShadowConstants (cullResults.visibleLights, ref shadows);
}
void ResizeIfNecessary(int curWidth, int curHeight)

var numTilesX = (camera.pixelWidth + 15) / 16;
var numTilesY = (camera.pixelHeight + 15) / 16;
cmd.DispatchCompute(buildPerVoxelLightListShader, s_GenListPerVoxelKernel, numTilesX, numTilesY, 1);
}
void BuildPerTileLightLists(Camera camera, RenderLoop loop, int numLights, Matrix4x4 projscr, Matrix4x4 invProjscr)
{
var w = camera.pixelWidth;
var h = camera.pixelHeight;
var numTilesX = (w + 15) / 16;
var numTilesY = (h + 15) / 16;
var numBigTilesX = (w + 63) / 64;
var numBigTilesY = (h + 63) / 64;
var cmd = new CommandBuffer() { name = "Build light list" };
// generate screen-space AABBs (used for both fptl and clustered).
{
var proj = CameraProjection(camera);
var temp = new Matrix4x4();
temp.SetRow(0, new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
temp.SetRow(1, new Vector4(0.0f, 1.0f, 0.0f, 0.0f));
temp.SetRow(2, new Vector4(0.0f, 0.0f, 0.5f, 0.5f));
temp.SetRow(3, new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
var projh = temp * proj;
var invProjh = projh.inverse;
cmd.SetComputeIntParam(buildScreenAABBShader, "g_iNrVisibLights", numLights);
SetMatrixCS(cmd, buildScreenAABBShader, "g_mProjection", projh);
SetMatrixCS(cmd, buildScreenAABBShader, "g_mInvProjection", invProjh);
cmd.SetComputeBufferParam(buildScreenAABBShader, s_GenAABBKernel, "g_vBoundsBuffer", s_AABBBoundsBuffer);
cmd.DispatchCompute(buildScreenAABBShader, s_GenAABBKernel, (numLights + 7) / 8, 1, 1);
}
// enable coarse 2D pass on 64x64 tiles (used for both fptl and clustered).
if(enableBigTilePrepass)
{
cmd.SetComputeIntParams(buildPerBigTileLightListShader, "g_viDimensions", new int[2] { w, h });
cmd.SetComputeIntParam(buildPerBigTileLightListShader, "g_iNrVisibLights", numLights);
SetMatrixCS(cmd, buildPerBigTileLightListShader, "g_mScrProjection", projscr);
SetMatrixCS(cmd, buildPerBigTileLightListShader, "g_mInvScrProjection", invProjscr);
cmd.SetComputeFloatParam(buildPerBigTileLightListShader, "g_fNearPlane", camera.nearClipPlane);
cmd.SetComputeFloatParam(buildPerBigTileLightListShader, "g_fFarPlane", camera.farClipPlane);
cmd.SetComputeBufferParam(buildPerBigTileLightListShader, s_GenListPerBigTileKernel, "g_vLightList", s_BigTileLightList);
cmd.DispatchCompute(buildPerBigTileLightListShader, s_GenListPerBigTileKernel, numBigTilesX, numBigTilesY, 1);
}
if( UsingFptl() ) // optimized for opaques only
{
cmd.SetComputeIntParams(buildPerTileLightListShader, "g_viDimensions", new int[2] { w, h });
cmd.SetComputeIntParam(buildPerTileLightListShader, "g_iNrVisibLights", numLights);
SetMatrixCS(cmd, buildPerTileLightListShader, "g_mScrProjection", projscr);
SetMatrixCS(cmd, buildPerTileLightListShader, "g_mInvScrProjection", invProjscr);
cmd.SetComputeTextureParam(buildPerTileLightListShader, s_GenListPerTileKernel, "g_depth_tex", new RenderTargetIdentifier(s_CameraDepthTexture));
cmd.SetComputeBufferParam(buildPerTileLightListShader, s_GenListPerTileKernel, "g_vLightList", s_LightList);
if(enableBigTilePrepass) cmd.SetComputeBufferParam(buildPerTileLightListShader, s_GenListPerTileKernel, "g_vBigTileLightList", s_BigTileLightList);
cmd.DispatchCompute(buildPerTileLightListShader, s_GenListPerTileKernel, numTilesX, numTilesY, 1);
}
if (enableClustered) // works for transparencies too.
{
VoxelLightListGeneration(cmd, camera, numLights, projscr, invProjscr);
}
loop.ExecuteCommandBuffer(cmd);
cmd.Dispose();
}
void PushGlobalParams(Camera camera, RenderLoop loop, Matrix4x4 viewToWorld, Matrix4x4 scrProj, Matrix4x4 incScrProj, int numDirLights)

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