using System; using System.Collections.Generic; #if UNITY_EDITOR using UnityEditor.Experimental.Rendering.LightweightPipeline; #endif using UnityEngine.Rendering; using UnityEngine.Rendering.PostProcessing; using UnityEngine.XR; namespace UnityEngine.Experimental.Rendering.LightweightPipeline { public partial class LightweightPipeline : RenderPipeline { public LightweightPipelineAsset pipelineAsset { get; private set; } CameraComparer m_CameraComparer = new CameraComparer(); LightweightForwardRenderer m_Renderer; CullResults m_CullResults; List m_LocalLightIndices = new List(); bool m_IsCameraRendering; public LightweightPipeline(LightweightPipelineAsset asset) { pipelineAsset = asset; SetSupportedRenderingFeatures(); SetPipelineCapabilities(asset); PerFrameBuffer._GlossyEnvironmentColor = Shader.PropertyToID("_GlossyEnvironmentColor"); PerFrameBuffer._SubtractiveShadowColor = Shader.PropertyToID("_SubtractiveShadowColor"); PerCameraBuffer._ScaledScreenParams = Shader.PropertyToID("_ScaledScreenParams"); m_Renderer = new LightweightForwardRenderer(asset); // Let engine know we have MSAA on for cases where we support MSAA backbuffer if (QualitySettings.antiAliasing != pipelineAsset.msaaSampleCount) QualitySettings.antiAliasing = pipelineAsset.msaaSampleCount; Shader.globalRenderPipeline = "LightweightPipeline"; m_IsCameraRendering = false; } public override void Dispose() { base.Dispose(); Shader.globalRenderPipeline = ""; SupportedRenderingFeatures.active = new SupportedRenderingFeatures(); #if UNITY_EDITOR SceneViewDrawMode.ResetDrawMode(); #endif m_Renderer.Dispose(); } public override void Render(ScriptableRenderContext context, Camera[] cameras) { if (m_IsCameraRendering) { Debug.LogWarning("Nested camera rendering is forbidden. If you are calling camera.Render inside OnWillRenderObject callback, use BeginCameraRender callback instead."); return; } base.Render(context, cameras); BeginFrameRendering(cameras); GraphicsSettings.lightsUseLinearIntensity = true; SetupPerFrameShaderConstants(); // Sort cameras array by camera depth Array.Sort(cameras, m_CameraComparer); foreach (Camera camera in cameras) { BeginCameraRendering(camera); string renderCameraTag = "Render " + camera.name; CommandBuffer cmd = CommandBufferPool.Get(renderCameraTag); using (new ProfilingSample(cmd, renderCameraTag)) { m_IsCameraRendering = true; CameraData cameraData; InitializeCameraData(camera, out cameraData); SetupPerCameraShaderConstants(cameraData); ScriptableCullingParameters cullingParameters; if (!CullResults.GetCullingParameters(camera, cameraData.isStereoEnabled, out cullingParameters)) { CommandBufferPool.Release(cmd); continue; } cullingParameters.shadowDistance = Mathf.Min(cameraData.maxShadowDistance, camera.farClipPlane); context.ExecuteCommandBuffer(cmd); cmd.Clear(); #if UNITY_EDITOR // Emit scene view UI if (cameraData.isSceneViewCamera) ScriptableRenderContext.EmitWorldGeometryForSceneView(camera); #endif CullResults.Cull(ref cullingParameters, context, ref m_CullResults); List visibleLights = m_CullResults.visibleLights; RenderingData renderingData; InitializeRenderingData(ref cameraData, visibleLights, m_Renderer.maxSupportedLocalLightsPerPass, m_Renderer.maxSupportedVertexLights, out renderingData); m_Renderer.Setup(ref context, ref m_CullResults, ref renderingData); m_Renderer.Execute(ref context, ref m_CullResults, ref renderingData); m_IsCameraRendering = false; } context.ExecuteCommandBuffer(cmd); CommandBufferPool.Release(cmd); context.Submit(); } } public static void RenderPostProcess(CommandBuffer cmd, PostProcessRenderContext context, ref CameraData cameraData, RenderTextureFormat colorFormat, RenderTargetIdentifier source, RenderTargetIdentifier dest, bool opaqueOnly) { context.Reset(); context.camera = cameraData.camera; context.source = source; context.sourceFormat = colorFormat; context.destination = dest; context.command = cmd; context.flip = cameraData.camera.targetTexture == null; if (opaqueOnly) cameraData.postProcessLayer.RenderOpaqueOnly(context); else cameraData.postProcessLayer.Render(context); } void SetSupportedRenderingFeatures() { #if UNITY_EDITOR SupportedRenderingFeatures.active = new SupportedRenderingFeatures() { reflectionProbeSupportFlags = SupportedRenderingFeatures.ReflectionProbeSupportFlags.None, defaultMixedLightingMode = SupportedRenderingFeatures.LightmapMixedBakeMode.Subtractive, supportedMixedLightingModes = SupportedRenderingFeatures.LightmapMixedBakeMode.Subtractive, supportedLightmapBakeTypes = LightmapBakeType.Baked | LightmapBakeType.Mixed, supportedLightmapsModes = LightmapsMode.CombinedDirectional | LightmapsMode.NonDirectional, rendererSupportsLightProbeProxyVolumes = false, rendererSupportsMotionVectors = false, rendererSupportsReceiveShadows = true, rendererSupportsReflectionProbes = true }; SceneViewDrawMode.SetupDrawMode(); #endif } void InitializeCameraData(Camera camera, out CameraData cameraData) { const float kRenderScaleThreshold = 0.05f; cameraData.camera = camera; bool msaaEnabled = camera.allowMSAA && pipelineAsset.msaaSampleCount > 1; if (msaaEnabled) cameraData.msaaSamples = (camera.targetTexture != null) ? camera.targetTexture.antiAliasing : pipelineAsset.msaaSampleCount; else cameraData.msaaSamples = 1; cameraData.isSceneViewCamera = camera.cameraType == CameraType.SceneView; cameraData.isOffscreenRender = camera.targetTexture != null && !cameraData.isSceneViewCamera; cameraData.isStereoEnabled = IsStereoEnabled(camera); cameraData.isHdrEnabled = camera.allowHDR && pipelineAsset.supportsHDR; cameraData.postProcessLayer = camera.GetComponent(); cameraData.postProcessEnabled = cameraData.postProcessLayer != null && cameraData.postProcessLayer.isActiveAndEnabled; // PostProcess for VR is not working atm. Disable it for now. cameraData.postProcessEnabled &= !cameraData.isStereoEnabled; Rect cameraRect = camera.rect; cameraData.isDefaultViewport = (!(Math.Abs(cameraRect.x) > 0.0f || Math.Abs(cameraRect.y) > 0.0f || Math.Abs(cameraRect.width) < 1.0f || Math.Abs(cameraRect.height) < 1.0f)); // Discard variations lesser than kRenderScaleThreshold. // Scale is only enabled for gameview // XR has it's own scaling mechanism. cameraData.renderScale = (Mathf.Abs(1.0f - pipelineAsset.renderScale) < kRenderScaleThreshold) ? 1.0f : pipelineAsset.renderScale; cameraData.renderScale = (camera.cameraType == CameraType.Game && !cameraData.isStereoEnabled) ? cameraData.renderScale : 1.0f; cameraData.requiresDepthTexture = pipelineAsset.supportsCameraDepthTexture || cameraData.postProcessEnabled || cameraData.isSceneViewCamera; cameraData.requiresSoftParticles = pipelineAsset.supportsSoftParticles; cameraData.requiresOpaqueTexture = pipelineAsset.supportsCameraOpaqueTexture; cameraData.opaqueTextureDownsampling = pipelineAsset.opaqueDownsampling; bool anyShadowsEnabled = pipelineAsset.supportsDirectionalShadows || pipelineAsset.supportsLocalShadows; cameraData.maxShadowDistance = (anyShadowsEnabled) ? pipelineAsset.shadowDistance : 0.0f; } void InitializeRenderingData(ref CameraData cameraData, List visibleLights, int maxSupportedLocalLightsPerPass, int maxSupportedVertexLights, out RenderingData renderingData) { m_LocalLightIndices.Clear(); bool hasDirectionalShadowCastingLight = false; bool hasLocalShadowCastingLight = false; if (cameraData.maxShadowDistance > 0.0f) { for (int i = 0; i < visibleLights.Count; ++i) { bool castShadows = visibleLights[i].light.shadows != LightShadows.None; if (visibleLights[i].lightType == LightType.Directional) { hasDirectionalShadowCastingLight |= castShadows; } else { hasLocalShadowCastingLight |= castShadows; m_LocalLightIndices.Add(i); } } } renderingData.cameraData = cameraData; InitializeLightData(visibleLights, maxSupportedLocalLightsPerPass, maxSupportedVertexLights, out renderingData.lightData); InitializeShadowData(hasDirectionalShadowCastingLight, hasLocalShadowCastingLight, out renderingData.shadowData); renderingData.supportsDynamicBatching = pipelineAsset.supportsDynamicBatching; } void InitializeShadowData(bool hasDirectionalShadowCastingLight, bool hasLocalShadowCastingLight, out ShadowData shadowData) { // Until we can have keyword stripping forcing single cascade hard shadows on gles2 bool supportsScreenSpaceShadows = SystemInfo.graphicsDeviceType != GraphicsDeviceType.OpenGLES2; shadowData.renderDirectionalShadows = pipelineAsset.supportsDirectionalShadows && hasDirectionalShadowCastingLight; shadowData.requiresScreenSpaceShadowResolve = shadowData.renderDirectionalShadows && supportsScreenSpaceShadows; shadowData.directionalLightCascadeCount = (shadowData.requiresScreenSpaceShadowResolve) ? pipelineAsset.cascadeCount : 1; shadowData.directionalShadowAtlasWidth = pipelineAsset.directionalShadowAtlasResolution; shadowData.directionalShadowAtlasHeight = pipelineAsset.directionalShadowAtlasResolution; switch (shadowData.directionalLightCascadeCount) { case 1: shadowData.directionalLightCascades = new Vector3(1.0f, 0.0f, 0.0f); break; case 2: shadowData.directionalLightCascades = new Vector3(pipelineAsset.cascade2Split, 1.0f, 0.0f); break; default: shadowData.directionalLightCascades = pipelineAsset.cascade4Split; break; } shadowData.renderLocalShadows = pipelineAsset.supportsLocalShadows && hasLocalShadowCastingLight; shadowData.localShadowAtlasWidth = shadowData.localShadowAtlasHeight = pipelineAsset.localShadowAtlasResolution; shadowData.supportsSoftShadows = pipelineAsset.supportsSoftShadows; shadowData.bufferBitCount = 16; shadowData.renderedDirectionalShadowQuality = LightShadows.None; shadowData.renderedLocalShadowQuality = LightShadows.None; } void InitializeLightData(List visibleLights, int maxSupportedLocalLightsPerPass, int maxSupportedVertexLights, out LightData lightData) { int visibleLightsCount = Math.Min(visibleLights.Count, pipelineAsset.maxPixelLights); lightData.mainLightIndex = GetMainLight(visibleLights); // If we have a main light we don't shade it in the per-object light loop. We also remove it from the per-object cull list int mainLightPresent = (lightData.mainLightIndex >= 0) ? 1 : 0; int additionalPixelLightsCount = Math.Min(visibleLightsCount - mainLightPresent, maxSupportedLocalLightsPerPass); int vertexLightCount = (pipelineAsset.supportsVertexLight) ? Math.Min(visibleLights.Count, maxSupportedLocalLightsPerPass) - additionalPixelLightsCount : 0; vertexLightCount = Math.Min(vertexLightCount, maxSupportedVertexLights); lightData.pixelAdditionalLightsCount = additionalPixelLightsCount; lightData.totalAdditionalLightsCount = additionalPixelLightsCount + vertexLightCount; lightData.visibleLights = visibleLights; lightData.visibleLocalLightIndices = m_LocalLightIndices; } // Main Light is always a directional light int GetMainLight(List visibleLights) { int totalVisibleLights = visibleLights.Count; if (totalVisibleLights == 0 || pipelineAsset.maxPixelLights == 0) return -1; for (int i = 0; i < totalVisibleLights; ++i) { VisibleLight currLight = visibleLights[i]; // Particle system lights have the light property as null. We sort lights so all particles lights // come last. Therefore, if first light is particle light then all lights are particle lights. // In this case we either have no main light or already found it. if (currLight.light == null) break; // In case no shadow light is present we will return the brightest directional light if (currLight.lightType == LightType.Directional) return i; } return -1; } void SetupPerFrameShaderConstants() { // When glossy reflections are OFF in the shader we set a constant color to use as indirect specular SphericalHarmonicsL2 ambientSH = RenderSettings.ambientProbe; Color linearGlossyEnvColor = new Color(ambientSH[0, 0], ambientSH[1, 0], ambientSH[2, 0]) * RenderSettings.reflectionIntensity; Color glossyEnvColor = CoreUtils.ConvertLinearToActiveColorSpace(linearGlossyEnvColor); Shader.SetGlobalVector(PerFrameBuffer._GlossyEnvironmentColor, glossyEnvColor); // Used when subtractive mode is selected Shader.SetGlobalVector(PerFrameBuffer._SubtractiveShadowColor, CoreUtils.ConvertSRGBToActiveColorSpace(RenderSettings.subtractiveShadowColor)); } void SetupPerCameraShaderConstants(CameraData cameraData) { float cameraWidth = (float)cameraData.camera.pixelWidth * cameraData.renderScale; float cameraHeight = (float)cameraData.camera.pixelWidth * cameraData.renderScale; Shader.SetGlobalVector(PerCameraBuffer._ScaledScreenParams, new Vector4(cameraWidth, cameraHeight, 1.0f + 1.0f / cameraWidth, 1.0f + 1.0f / cameraHeight)); } bool IsStereoEnabled(Camera camera) { #if !UNITY_SWITCH bool isSceneViewCamera = camera.cameraType == CameraType.SceneView; return XRSettings.isDeviceActive && !isSceneViewCamera && (camera.stereoTargetEye == StereoTargetEyeMask.Both); #else return false; #endif } } }