refactor(new_editor/app): reorganize host structure and add smoke test

new_editor/app/Rendering/Viewport/ViewportHostServiceLifecycle.cpp

@@ -0,0 +1,71 @@
+#include "ViewportHostService.h"
+
+namespace XCEngine::UI::Editor::App {
+
+void ViewportHostService::AttachWindowRenderer(
+    Host::D3D12WindowRenderer& windowRenderer) {
+    if (m_windowRenderer == &windowRenderer) {
+        m_device = windowRenderer.GetRHIDevice();
+        if (m_device != nullptr && !m_textureDescriptorAllocator.IsInitialized()) {
+            m_textureDescriptorAllocator.Initialize(*m_device);
+        }
+        return;
+    }
+
+    Shutdown();
+    m_windowRenderer = &windowRenderer;
+    m_device = windowRenderer.GetRHIDevice();
+    if (m_device != nullptr) {
+        m_textureDescriptorAllocator.Initialize(*m_device);
+    }
+}
+
+void ViewportHostService::DetachWindowRenderer() {
+    Shutdown();
+}
+
+void ViewportHostService::SetSurfacePresentationEnabled(bool enabled) {
+    m_surfacePresentationEnabled = enabled;
+}
+
+void ViewportHostService::Shutdown() {
+    for (ViewportEntry& entry : m_entries) {
+        DestroyViewportEntry(entry);
+    }
+
+    m_textureDescriptorAllocator.Shutdown();
+    m_windowRenderer = nullptr;
+    m_device = nullptr;
+    m_surfacePresentationEnabled = false;
+}
+
+void ViewportHostService::BeginFrame() {
+    for (ViewportEntry& entry : m_entries) {
+        entry.requestedWidth = 0;
+        entry.requestedHeight = 0;
+        entry.requestedThisFrame = false;
+        entry.renderedThisFrame = false;
+        entry.kind = (&entry == &m_entries[0]) ? ViewportKind::Scene : ViewportKind::Game;
+    }
+}
+
+ViewportHostService::ViewportEntry& ViewportHostService::GetEntry(
+    ViewportKind kind) {
+    const std::size_t index = kind == ViewportKind::Scene ? 0u : 1u;
+    ViewportEntry& entry = m_entries[index];
+    entry.kind = kind;
+    return entry;
+}
+
+const ViewportHostService::ViewportEntry& ViewportHostService::GetEntry(
+    ViewportKind kind) const {
+    const std::size_t index = kind == ViewportKind::Scene ? 0u : 1u;
+    return m_entries[index];
+}
+
+void ViewportHostService::DestroyViewportEntry(ViewportEntry& entry) {
+    m_renderTargetManager.DestroyTargets(&m_textureDescriptorAllocator, entry.renderTargets);
+    entry = {};
+}
+
+} // namespace XCEngine::UI::Editor::App