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diff --git a/lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer2.h b/lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer2.h
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+// dear imgui: Renderer Backend for SDL_Renderer for SDL2
+// (Requires: SDL 2.0.17+)
+
+// Note how SDL_Renderer is an _optional_ component of SDL2.
+// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX.
+// If your application will want to render any non trivial amount of graphics other than UI,
+// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user and
+// it might be difficult to step out of those boundaries.
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID!
+//  [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices.
+
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
+// Learn about Dear ImGui:
+// - FAQ                  https://dearimgui.com/faq
+// - Getting Started      https://dearimgui.com/getting-started
+// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
+// - Introduction, links and more at the top of imgui.cpp
+
+#pragma once
+#ifndef IMGUI_DISABLE
+#include "imgui.h"      // IMGUI_IMPL_API
+
+struct SDL_Renderer;
+
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer2_Init(SDL_Renderer* renderer);
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_Shutdown();
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer* renderer);
+
+// Called by Init/NewFrame/Shutdown
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer2_CreateFontsTexture();
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_DestroyFontsTexture();
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer2_CreateDeviceObjects();
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_DestroyDeviceObjects();
+
+#endif // #ifndef IMGUI_DISABLE