Windows平台C++游戏修改器：寻求非Hook覆盖层绘图库实现菜单

Hey, I totally get where you're coming from—DirectX hooking for game overlays is a massive pain with that steep learning curve, and SFML's clean, straightforward drawing API is way more appealing. Here are a few practical approaches to build your interactive mod menu without wrestling with DirectX:

This is the most straightforward route, no need to touch the game's rendering pipeline at all:

• Spin up a separate SFML RenderWindow as your mod menu UI
• Register global hotkeys using Windows API calls like RegisterHotKey to toggle the window's visibility
• Build your interactive menu using SFML's built-in Text, RectangleShape, or use a third-party SFML UI library like TGUI for pre-made buttons/sliders
• Handle menu actions by reading/writing to the game's memory directly via Windows API functions (OpenProcess, ReadProcessMemory, WriteProcessMemory)

Pros: You get full access to all of SFML's convenience features, no game rendering integration required, and development is fast.
Notes: Set the window to stay on top with SetWindowPos to avoid it being hidden by the game. If the game runs in exclusive fullscreen, consider making your menu borderless or prompting the user to switch to windowed mode first.

If you want an embedded overlay feel similar to Discord's, you can still use SFML with a bit of process injection know-how:

• Inject your mod DLL (alongside SFML's runtime DLLs like sfml-graphics-2.dll) into the game process
• Create an SFML RenderTexture as an offscreen target, and draw your menu UI onto it
• Grab the game window's device context (DC) via Windows API, then use StretchBlt to blit the RenderTexture content onto the game window
• Use a hook like SetWindowsHookEx to listen for game window messages and handle menu interactions (mouse clicks, keyboard input)

A simplified code snippet for the rendering part:

// Initialize offscreen render target
sf::RenderTexture menuRenderTarget;
menuRenderTarget.create(800, 600);

// Draw menu elements
menuRenderTarget.clear(sf::Color(0, 0, 0, 180)); // Semi-transparent background
sf::Text menuTitle("Game Mod Menu", font, 24);
menuRenderTarget.draw(menuTitle);
// Add more UI elements...
menuRenderTarget.display();

// Blit to game window
HDC gameHdc = GetDC(gameWindowHandle);
const sf::Texture& menuTexture = menuRenderTarget.getTexture();
sf::Image menuImage = menuTexture.copyToImage();
StretchBlt(gameHdc, 0, 0, 800, 600, 
           CreateCompatibleDC(gameHdc), 0, 0, 800, 600, SRCCOPY);
ReleaseDC(gameWindowHandle, gameHdc);

Pros: Achieves that seamless embedded overlay experience while still using SFML's familiar drawing API.
Notes: Process injection requires handling Windows permissions, and some anti-cheat systems may flag your DLL. You'll also need to optimize the blitting step to avoid framerate drops.

If you want a polished, interactive UI without building every component from scratch, pair SFML with ImGui:

• Integrate ImGui's SFML backend (either in a standalone window or injected process setup)
• ImGui provides pre-built UI components like buttons, checkboxes, sliders, and input fields with minimal code
• Example menu code:

ImGui::Begin("Game Mod Menu");
if (ImGui::Button("Infinite Health")) {
    // Write to game memory to set health to max
}
ImGui::SliderInt("Attack Power", &attackValue, 1, 100);
if (ImGui::IsItemEdited()) {
    // Update game memory with new attack value
}
ImGui::End();

Pros: Saves you from writing custom UI logic, ImGui handles event processing and rendering via the SFML backend, and the result looks professional.
Notes: Make sure to properly link ImGui and SFML dependencies during compilation to avoid linker errors.

I’ve been in your shoes before—spent hours messing with DirectX hooks before switching to the SFML + ImGui standalone window approach, which cut my development time in half. If the game doesn’t have aggressive anti-cheat, this setup works perfectly for most modding needs.

内容的提问来源于stack exchange，提问作者HowITsDone