void RenderSSGI(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount) { // Grab the global illumination volume component GlobalIllumination giSettings = hdCamera.volumeStack.GetComponent <GlobalIllumination>(); // Based on if we are doing it in half resolution or full, we need to define initial and final buffer to avoid a useless blit RTHandle buffer0, buffer1; if (giSettings.fullResolutionSS) { buffer0 = m_IndirectDiffuseBuffer0; buffer1 = m_IndirectDiffuseBuffer1; } else { buffer0 = m_IndirectDiffuseBuffer1; buffer1 = m_IndirectDiffuseBuffer0; } using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SSGIPass))) { // Trace the signal using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SSGITrace))) { SSGITraceParameters parameters = PrepareSSGITraceParameters(hdCamera, giSettings); SSGITraceResources resources = PrepareSSGITraceResources(hdCamera, buffer0, m_IndirectDiffuseHitPointBuffer); ExecuteSSGITrace(cmd, parameters, resources); } // Denoise it using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SSGIDenoise))) { float historyValidity = EvaluateHistoryValidity(hdCamera); SSGIDenoiser ssgiDenoiser = GetSSGIDenoiser(); ssgiDenoiser.Denoise(cmd, hdCamera, buffer0, buffer1, halfResolution: !giSettings.fullResolutionSS, historyValidity: historyValidity); } // Upscale it if required // If this was a half resolution effect, we still have to upscale it if (!giSettings.fullResolutionSS) { using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SSGIUpscale))) { ComputeShader bilateralUpsampleCS = m_Asset.renderPipelineResources.shaders.bilateralUpsampleCS; SSGIUpscaleParameters parameters = PrepareSSGIUpscaleParameters(hdCamera, giSettings); SSGIUpscaleResources resources = PrepareSSGIUpscaleResources(hdCamera, buffer0, buffer1); ExecuteSSGIUpscale(cmd, parameters, resources); } } (RenderPipelineManager.currentPipeline as HDRenderPipeline).PushFullScreenDebugTexture(hdCamera, cmd, m_IndirectDiffuseBuffer0, FullScreenDebugMode.ScreenSpaceGlobalIllumination); } }
SSGIUpscaleParameters PrepareSSGIUpscaleParameters(HDCamera hdCamera, GlobalIllumination settings, HDUtils.PackedMipChainInfo info) { SSGIUpscaleParameters parameters = new SSGIUpscaleParameters(); // Set the camera parameters parameters.texWidth = hdCamera.actualWidth; parameters.texHeight = hdCamera.actualHeight; parameters.viewCount = hdCamera.viewCount; parameters.halfScreenSize.Set(parameters.texWidth / 2, parameters.texHeight / 2, 1.0f / (parameters.texWidth * 0.5f), 1.0f / (parameters.texHeight * 0.5f)); // Set the generation parameters parameters.firstMipOffset.Set(HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].x), HDShadowUtils.Asfloat((uint)info.mipLevelOffsets[1].y)); // Grab the right kernel parameters.bilateralUpsampleCS = m_Asset.renderPipelineResources.shaders.bilateralUpsampleCS; parameters.upscaleKernel = m_BilateralUpSampleColorKernel; return(parameters); }
static void ExecuteSSGIUpscale(CommandBuffer cmd, SSGIUpscaleParameters parameters, SSGIUpscaleResources resources) { // Re-evaluate the dispatch parameters (we are evaluating the upsample in full resolution) int ssgiTileSize = 8; int numTilesXHR = (parameters.texWidth + (ssgiTileSize - 1)) / ssgiTileSize; int numTilesYHR = (parameters.texHeight + (ssgiTileSize - 1)) / ssgiTileSize; // Inject the input scalars cmd.SetComputeVectorParam(parameters.bilateralUpsampleCS, HDShaderIDs._HalfScreenSize, parameters.halfScreenSize); cmd.SetComputeVectorParam(parameters.bilateralUpsampleCS, HDShaderIDs._DepthPyramidFirstMipLevelOffset, parameters.firstMipOffset); // Inject all the input buffers cmd.SetComputeTextureParam(parameters.bilateralUpsampleCS, parameters.upscaleKernel, HDShaderIDs._DepthTexture, resources.depthTexture); cmd.SetComputeTextureParam(parameters.bilateralUpsampleCS, parameters.upscaleKernel, HDShaderIDs._LowResolutionTexture, resources.inputBuffer); // Inject the output textures cmd.SetComputeTextureParam(parameters.bilateralUpsampleCS, parameters.upscaleKernel, HDShaderIDs._OutputUpscaledTexture, resources.outputBuffer); // Upscale the buffer to full resolution cmd.DispatchCompute(parameters.bilateralUpsampleCS, parameters.upscaleKernel, numTilesXHR, numTilesYHR, parameters.viewCount); }