XCEngine/new_editor/include/XCNewEditor/Host/NativeRenderer.h

#pragma once

#ifndef NOMINMAX
#define NOMINMAX
#endif

#include <XCEngine/UI/DrawData.h>

#include <d2d1.h>
#include <dwrite.h>
#include <wincodec.h>
#include <windows.h>
#include <wrl/client.h>

#include <filesystem>
#include <string>
#include <string_view>
#include <unordered_map>
#include <vector>

namespace XCEngine::XCUI::Host {

class NativeRenderer {
public:
    bool Initialize(HWND hwnd);
    void Shutdown();
    void Resize(UINT width, UINT height);
    bool Render(const ::XCEngine::UI::UIDrawData& drawData);
    bool CaptureToPng(
        const ::XCEngine::UI::UIDrawData& drawData,
        UINT width,
        UINT height,
        const std::filesystem::path& outputPath,
        std::string& outError);

private:
    bool EnsureRenderTarget();
    bool EnsureWicFactory(std::string& outError);
    void DiscardRenderTarget();
    bool CreateDeviceResources();
    bool RenderToTarget(
        ID2D1RenderTarget& renderTarget,
        ID2D1SolidColorBrush& solidBrush,
        const ::XCEngine::UI::UIDrawData& drawData);
    void RenderCommand(
        ID2D1RenderTarget& renderTarget,
        ID2D1SolidColorBrush& solidBrush,
        const ::XCEngine::UI::UIDrawCommand& command,
        std::vector<D2D1_RECT_F>& clipStack);

    IDWriteTextFormat* GetTextFormat(float fontSize);
    static D2D1_COLOR_F ToD2DColor(const ::XCEngine::UI::UIColor& color);
    static std::wstring Utf8ToWide(std::string_view text);

    HWND m_hwnd = nullptr;
    Microsoft::WRL::ComPtr<ID2D1Factory> m_d2dFactory;
    Microsoft::WRL::ComPtr<IDWriteFactory> m_dwriteFactory;
    Microsoft::WRL::ComPtr<IWICImagingFactory> m_wicFactory;
    Microsoft::WRL::ComPtr<ID2D1HwndRenderTarget> m_renderTarget;
    Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> m_solidBrush;
    std::unordered_map<int, Microsoft::WRL::ComPtr<IDWriteTextFormat>> m_textFormats;
    bool m_wicComInitialized = false;
};

} // namespace XCEngine::XCUI::Host