Tighten final color contract

docs/plan/Renderer剩余收口与体积渲染多后端正式化计划_2026-04-10.md

@@ -12,7 +12,7 @@
 本轮目标有且只有四类：
 
 1. 把 NanoVDB 体积渲染从 D3D12 单后端正式能力推进到 Vulkan / OpenGL 正式能力。
-2. 把 `FinalColor` 与 volume/final-output 的契约收死，消除“接口已存在但运行时半接线”的状态。
+2. 把 `FinalColor` 与 final-output 的契约收死，消除“接口已存在但运行时半接线”的状态。
 3. 把 `ObjectId` 从“低 32 位截断可用方案”推进到清晰稳定的正式渲染 ID 契约。
 4. 把阴影规划与前向管线剩余的硬编码策略、monolith 结构继续拆干净。
 
@@ -23,7 +23,7 @@
 当前 Rendering 已经具备稳定运行基础，但还不能称为“完全收口”，核心原因是：
 
 1. `volume_scene / volume_occlusion_scene / volume_transform_scene` 目前仍只在 D3D12 上做了正式实例化与 GT 验证。
-2. `FinalColorSettings` 已经具备 pipeline/camera/volume 三层策略接口，但运行时只真正接入了 pipeline + camera。
+2. `FinalColorSettings` 当前真正落地的是 pipeline defaults + camera overrides；此前残留的 volume override 分支只是头文件级 API，并未进入运行时。
 3. `ObjectId` 仍基于 runtime object id 低 32 位编码，不是长期正式方案。
 4. `SceneRenderRequestPlanner` 里仍保留方向光阴影尺寸与 focus 策略的硬编码。
 5. `BuiltinForwardPipeline` 功能上可用，但资源布局、PSO、descriptor、skybox、draw path 仍聚集在同一条大实现链里。
@@ -92,12 +92,10 @@
 
 任务：
 
-1. 审查 `FinalColorSettings`、camera overrides、volume overrides 的设计边界。
-2. 二选一处理 volume override：
-   - 真正接入运行时解析链路；
-   - 或明确从现阶段 API 中收掉，不再保留半接线接口。
+1. 审查 `FinalColorSettings`、camera overrides、final-output 的设计边界。
+2. 将未落地的 volume override 分支从现阶段 API 中正式收掉，不再保留半接线接口。
 3. 补齐对应单测与场景回归测试。
-4. 明确 post-process / final-output / volume 的职责关系文档。
+4. 明确 post-process / final-output 的职责关系文档。
 
 验收标准：
 

engine/include/XCEngine/Rendering/Planning/FinalColorSettings.h

@@ -66,7 +66,6 @@ struct FinalColorOverrideSettings {
 struct ResolvedFinalColorPolicy : FinalColorSettings {
     bool hasPipelineDefaults = false;
     bool hasCameraOverrides = false;
-    bool hasVolumeOverrides = false;
 };
 
 inline void ApplyFinalColorOverrides(
@@ -95,8 +94,7 @@ inline void ApplyFinalColorOverrides(
 
 inline ResolvedFinalColorPolicy ResolveFinalColorPolicy(
     const FinalColorSettings& pipelineDefaults,
-    const FinalColorOverrideSettings* cameraOverrides = nullptr,
-    const FinalColorOverrideSettings* volumeOverrides = nullptr) {
+    const FinalColorOverrideSettings* cameraOverrides = nullptr) {
     ResolvedFinalColorPolicy resolved = {};
     resolved.outputTransferMode = pipelineDefaults.outputTransferMode;
     resolved.exposureMode = pipelineDefaults.exposureMode;
@@ -110,11 +108,6 @@ inline ResolvedFinalColorPolicy ResolveFinalColorPolicy(
         resolved.hasCameraOverrides = true;
     }
 
-    if (volumeOverrides != nullptr && volumeOverrides->HasOverrides()) {
-        ApplyFinalColorOverrides(*volumeOverrides, resolved);
-        resolved.hasVolumeOverrides = true;
-    }
-
     return resolved;
 }
 

engine/src/Rendering/Execution/SceneRenderer.cpp

@@ -1,6 +1,7 @@
 #include "Rendering/Execution/SceneRenderer.h"
 
 #include "Components/CameraComponent.h"
+#include "Debug/Logger.h"
 #include "Rendering/Caches/FullscreenPassSurfaceCache.h"
 #include "Rendering/Planning/CameraPostProcessPassFactory.h"
 #include "Rendering/Planning/FinalColorPassFactory.h"
@@ -19,6 +20,8 @@ RenderSurface ConfigureFullscreenStageSurface(
     RenderSurface surface = entry.surface;
     if (copyDepthAttachment) {
         surface.SetDepthAttachment(templateSurface.GetDepthAttachment());
+        surface.SetDepthStateBefore(templateSurface.GetDepthStateBefore());
+        surface.SetDepthStateAfter(templateSurface.GetDepthStateAfter());
         if (templateSurface.HasClearColorOverride()) {
             surface.SetClearColorOverride(templateSurface.GetClearColorOverride());
         }
@@ -175,8 +178,7 @@ void SceneRenderer::ResolveCameraFinalColorPolicies(
 
         request.finalColorPolicy = ResolveFinalColorPolicy(
             pipelineDefaults,
-            &request.camera->GetFinalColorOverrides(),
-            nullptr);
+            &request.camera->GetFinalColorOverrides());
     }
 }
 
@@ -206,6 +208,13 @@ void SceneRenderer::AttachFullscreenStageRequests(
             continue;
         }
 
+        if (request.surface.GetSampleCount() > 1u) {
+            Debug::Logger::Get().Error(
+                Debug::LogCategory::Rendering,
+                "SceneRenderer fullscreen post-process/final-output chain currently requires a single-sample main scene surface");
+            continue;
+        }
+
         const std::vector<RHI::RHIResourceView*>& colorAttachments = request.surface.GetColorAttachments();
         const RHI::Format colorFormat = colorAttachments[0]->GetFormat();
         if (colorFormat == RHI::Format::Unknown) {
@@ -240,6 +249,7 @@ void SceneRenderer::AttachFullscreenStageRequests(
             request.postProcess.sourceSurface =
                 ConfigureFullscreenStageSurface(*sceneColorEntry, request.surface, true);
             request.postProcess.sourceColorView = sceneColorEntry->shaderResourceView;
+            request.postProcess.sourceColorState = request.postProcess.sourceSurface.GetColorStateAfter();
             request.postProcess.destinationSurface =
                 hasFinalOutput
                     ? ConfigureFullscreenStageSurface(*postProcessOutputEntry, request.surface, false)
@@ -256,6 +266,7 @@ void SceneRenderer::AttachFullscreenStageRequests(
                     ? request.postProcess.destinationSurface
                     : ConfigureFullscreenStageSurface(*sceneColorEntry, request.surface, true);
             request.finalOutput.sourceColorView = finalOutputSourceEntry->shaderResourceView;
+            request.finalOutput.sourceColorState = request.finalOutput.sourceSurface.GetColorStateAfter();
             request.finalOutput.destinationSurface = request.surface;
             m_ownedFinalOutputSequences[index] = std::move(finalOutputSequence);
             request.finalOutput.passes = m_ownedFinalOutputSequences[index].get();

tests/Rendering/unit/test_camera_scene_renderer.cpp

@@ -2026,7 +2026,6 @@ TEST(SceneRenderer_Test, ResolvesFinalColorPolicyFromPipelineDefaultsAndCameraOv
     const CameraRenderRequest& request = requests[0];
     EXPECT_TRUE(request.finalColorPolicy.hasPipelineDefaults);
     EXPECT_TRUE(request.finalColorPolicy.hasCameraOverrides);
-    EXPECT_FALSE(request.finalColorPolicy.hasVolumeOverrides);
     EXPECT_EQ(
         request.finalColorPolicy.outputTransferMode,
         FinalColorOutputTransferMode::LinearToSRGB);