editor: centralize product panel manifest

editor/app/Rendering/Viewport/ViewportHostService.cpp

@@ -1,6 +1,7 @@
 #include "ViewportHostService.h"
 
 #include "Panels/EditorPanelIds.h"
+#include "Product/EditorProductManifest.h"
 #include "Viewport/SceneViewportResourcePaths.h"
 #include "ViewportRenderHost.h"
 
@@ -14,6 +15,30 @@ namespace {
 
 using ::XCEngine::RHI::ResourceStates;
 
+class PlaceholderViewportContentRenderer final : public IViewportContentRenderer {
+public:
+    explicit PlaceholderViewportContentRenderer(std::string_view statusText)
+        : m_statusText(statusText) {}
+
+    ViewportRenderResult Render(
+        ViewportRenderTargets&,
+        ::XCEngine::RHI::RHIDevice&,
+        const ::XCEngine::Rendering::RenderContext&) override {
+        ViewportRenderResult result = {};
+        result.rendered = false;
+        result.requiresFallbackClear = true;
+        result.statusText = m_statusText;
+        result.fallbackClearR = 0.07f;
+        result.fallbackClearG = 0.08f;
+        result.fallbackClearB = 0.10f;
+        result.fallbackClearA = 1.0f;
+        return result;
+    }
+
+private:
+    std::string m_statusText = {};
+};
+
 } // namespace
 
 ViewportHostService::ViewportHostService() = default;
@@ -22,10 +47,33 @@ ViewportHostService::~ViewportHostService() = default;
 
 void ViewportHostService::Initialize(const std::filesystem::path& repoRoot) {
     m_sceneViewportRuntime.Initialize(BuildSceneViewportShaderPaths(repoRoot));
-    SetContentRenderer(
-        kScenePanelId,
-        &m_sceneViewportRuntime,
-        SceneViewportRenderService::GetViewportResourceRequirements());
+    m_placeholderRenderers.clear();
+    for (const EditorProductPanelDescriptor& panel : GetEditorProductPanels()) {
+        if (panel.presentationKind != UIEditorPanelPresentationKind::ViewportShell) {
+            continue;
+        }
+
+        switch (panel.viewportRendererKind) {
+        case EditorProductViewportRendererKind::Scene:
+            SetContentRenderer(
+                panel.panelId,
+                &m_sceneViewportRuntime,
+                SceneViewportRenderService::GetViewportResourceRequirements());
+            break;
+        case EditorProductViewportRendererKind::Placeholder: {
+            auto placeholder =
+                std::make_unique<PlaceholderViewportContentRenderer>(
+                    panel.viewportPlaceholderStatus);
+            SetContentRenderer(panel.panelId, placeholder.get(), {});
+            m_placeholderRenderers.push_back(std::move(placeholder));
+            break;
+        }
+        case EditorProductViewportRendererKind::None:
+        default:
+            SetContentRenderer(panel.panelId, nullptr, {});
+            break;
+        }
+    }
 }
 
 void ViewportHostService::AttachWindowRenderer(
@@ -60,7 +108,12 @@ void ViewportHostService::SetContentRenderer(
 }
 
 void ViewportHostService::Shutdown() {
-    SetContentRenderer(kScenePanelId, nullptr, {});
+    for (const EditorProductPanelDescriptor& panel : GetEditorProductPanels()) {
+        if (panel.presentationKind == UIEditorPanelPresentationKind::ViewportShell) {
+            SetContentRenderer(panel.panelId, nullptr, {});
+        }
+    }
+    m_placeholderRenderers.clear();
     m_sceneViewportRuntime.Shutdown();
     for (auto& [viewportId, entry] : m_entries) {
         DestroyViewportEntry(entry);