Add XCUI window compositor seam

new_editor/src/XCUIBackend/ImGuiHostCompositor.cpp

@@ -0,0 +1,99 @@
+#include "XCUIBackend/IEditorHostCompositor.h"
+
+#include "UI/ImGuiBackendBridge.h"
+
+#include <imgui.h>
+
+namespace XCEngine {
+namespace Editor {
+namespace XCUIBackend {
+
+namespace {
+
+class ImGuiHostCompositor final : public IEditorHostCompositor {
+public:
+    bool Initialize(
+        HWND hwnd,
+        ::XCEngine::Editor::Platform::D3D12WindowRenderer& windowRenderer,
+        const ConfigureFontsCallback& configureFonts) override {
+        IMGUI_CHECKVERSION();
+        ImGui::CreateContext();
+
+        ImGuiIO& io = ImGui::GetIO();
+        io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
+        io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
+
+        if (configureFonts) {
+            configureFonts();
+        }
+
+        ImGui::StyleColorsDark();
+        m_backend.Initialize(
+            hwnd,
+            windowRenderer.GetDevice(),
+            windowRenderer.GetCommandQueue(),
+            windowRenderer.GetSrvHeap(),
+            windowRenderer.GetSrvDescriptorSize(),
+            windowRenderer.GetSrvDescriptorCount());
+        return true;
+    }
+
+    void Shutdown() override {
+        m_backend.Shutdown();
+        ImGui::DestroyContext();
+    }
+
+    bool HandleWindowMessage(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) override {
+        return ::XCEngine::Editor::UI::ImGuiBackendBridge::HandleWindowMessage(
+            hwnd,
+            message,
+            wParam,
+            lParam);
+    }
+
+    void BeginFrame() override {
+        m_backend.BeginFrame();
+    }
+
+    void EndFrameAndPresent(
+        ::XCEngine::Editor::Platform::D3D12WindowRenderer& windowRenderer,
+        const float clearColor[4],
+        const RenderCallback& beforeUiRender,
+        const RenderCallback& afterUiRender) override {
+        ImGui::Render();
+        windowRenderer.Render(m_backend, clearColor, beforeUiRender, afterUiRender);
+    }
+
+    bool CreateTextureDescriptor(
+        ::XCEngine::RHI::RHIDevice* device,
+        ::XCEngine::RHI::RHITexture* texture,
+        D3D12_CPU_DESCRIPTOR_HANDLE* outCpuHandle,
+        D3D12_GPU_DESCRIPTOR_HANDLE* outGpuHandle,
+        ImTextureID* outTextureId) override {
+        return m_backend.CreateTextureDescriptor(
+            device,
+            texture,
+            outCpuHandle,
+            outGpuHandle,
+            outTextureId);
+    }
+
+    void FreeTextureDescriptor(
+        D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle,
+        D3D12_GPU_DESCRIPTOR_HANDLE gpuHandle) override {
+        m_backend.FreeTextureDescriptor(cpuHandle, gpuHandle);
+    }
+
+private:
+    ::XCEngine::Editor::UI::ImGuiBackendBridge m_backend;
+};
+
+} // namespace
+
+std::unique_ptr<IEditorHostCompositor> CreateImGuiHostCompositor() {
+    return std::make_unique<ImGuiHostCompositor>();
+}
+
+} // namespace XCUIBackend
+} // namespace Editor
+} // namespace XCEngine