Add XCUI new editor sandbox phase 1

new_editor/src/XCUIBackend/ImGuiTextAtlasProvider.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "IXCUITextAtlasProvider.h"
+
+struct ImGuiContext;
+
+namespace XCEngine {
+namespace Editor {
+namespace XCUIBackend {
+
+class ImGuiTextAtlasProvider final : public IXCUITextAtlasProvider {
+public:
+    ImGuiTextAtlasProvider() = default;
+    explicit ImGuiTextAtlasProvider(::ImGuiContext* context);
+
+    void SetContext(::ImGuiContext* context);
+    ::ImGuiContext* GetContext() const;
+
+    bool GetAtlasTextureView(PixelFormat preferredFormat, AtlasTextureView& outView) const override;
+    std::size_t GetFontCount() const override;
+    FontHandle GetFont(std::size_t index) const override;
+    FontHandle GetDefaultFont() const override;
+    bool GetFontInfo(FontHandle font, FontInfo& outInfo) const override;
+    bool GetBakedFontInfo(FontHandle font, float fontSize, BakedFontInfo& outInfo) const override;
+    bool FindGlyph(FontHandle font, float fontSize, std::uint32_t codepoint, GlyphInfo& outInfo) const override;
+
+private:
+    ::ImGuiContext* ResolveContext() const;
+
+    ::ImGuiContext* m_context = nullptr;
+};
+
+} // namespace XCUIBackend
+} // namespace Editor
+} // namespace XCEngine