refactor: move scene view post-pass planning into renderer

engine/CMakeLists.txt

@@ -346,6 +346,7 @@ add_library(XCEngine STATIC
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Rendering/SceneRenderer.h
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Rendering/Passes/BuiltinObjectIdPass.h
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Rendering/Passes/BuiltinInfiniteGridPass.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Rendering/Passes/BuiltinSceneViewPostPassPlan.h
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Rendering/Passes/BuiltinObjectIdOutlinePass.h
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Rendering/Pipelines/BuiltinForwardPipeline.h
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Rendering/CameraRenderer.cpp

engine/include/XCEngine/Rendering/Passes/BuiltinSceneViewPostPassPlan.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include <cstdint>
+#include <vector>
+
+namespace XCEngine {
+namespace Rendering {
+namespace Passes {
+
+enum class BuiltinSceneViewPostPassStep : uint8_t {
+    ColorToRenderTarget,
+    InfiniteGrid,
+    SelectionOutline,
+    ColorToShaderResource,
+    SelectionMaskDebug
+};
+
+struct BuiltinSceneViewPostPassPlanInput {
+    bool overlayValid = false;
+    bool hasSelection = false;
+    bool debugSelectionMask = false;
+    bool hasObjectIdShaderView = false;
+};
+
+struct BuiltinSceneViewPostPassPlan {
+    bool valid = false;
+    std::vector<BuiltinSceneViewPostPassStep> steps;
+};
+
+inline BuiltinSceneViewPostPassPlan BuildBuiltinSceneViewPostPassPlan(
+    const BuiltinSceneViewPostPassPlanInput& input) {
+    BuiltinSceneViewPostPassPlan plan = {};
+    if (!input.overlayValid) {
+        return plan;
+    }
+
+    plan.valid = true;
+
+    if (input.debugSelectionMask) {
+        plan.steps.push_back(BuiltinSceneViewPostPassStep::ColorToRenderTarget);
+        if (input.hasSelection && input.hasObjectIdShaderView) {
+            plan.steps.push_back(BuiltinSceneViewPostPassStep::SelectionMaskDebug);
+        }
+        plan.steps.push_back(BuiltinSceneViewPostPassStep::ColorToShaderResource);
+        return plan;
+    }
+
+    plan.steps.push_back(BuiltinSceneViewPostPassStep::ColorToRenderTarget);
+    plan.steps.push_back(BuiltinSceneViewPostPassStep::InfiniteGrid);
+
+    if (input.hasSelection && input.hasObjectIdShaderView) {
+        plan.steps = {
+            BuiltinSceneViewPostPassStep::ColorToRenderTarget,
+            BuiltinSceneViewPostPassStep::InfiniteGrid,
+            BuiltinSceneViewPostPassStep::SelectionOutline,
+            BuiltinSceneViewPostPassStep::ColorToShaderResource
+        };
+        return plan;
+    }
+
+    plan.steps.push_back(BuiltinSceneViewPostPassStep::ColorToShaderResource);
+    return plan;
+}
+
+} // namespace Passes
+} // namespace Rendering
+} // namespace XCEngine