ImGM — ImGui for GameMaker

Background

This repository is heavily inspired and based on Nommiin's ImGui_GM

It was an inspiration for this to be extensible with ImGui extensions. So it needed refactoring.

It is basically a GitHub fork of ImGui_GM with alot of changes and updates. While mostly keeping the same concept ideas, workflows, and alot of the source code including wrappers (with a little changes).

Credits go to Nommiin also for helping me out

So what is this?

ImGM is a wrapper extension that brings the power of Dear ImGui to modern GameMaker projects. It enables immediate-mode GUI rendering with DLL integration, modular extension support, and rapid prototyping workflows.

🚀 Built for developers who want expressive UI, debug tools, and editor-like interfaces inside GameMaker.

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✨ Features

• ✅ Latest ImGui version (auto-synced via submodule)
• 🧩 Modular extension system — easily wrap new ImGui features
• 🛠️ DLL-backed performance — native calls with minimal overhead
• 📦 Auto-generated wrappers — build-time report generation
• 🧪 Example project included — test and iterate quickly

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📦 Installation

For Usage

1. Download the Package

Download the GameMaker package file(s) from the latest stable release.

2. Import the Package to your GameMaker project

Click import local package in GameMaker IDE when your project is opened. Select the downloaded .yymps file.

When the package is imported, you will have the extension added to your GameMaker project.

3. Add the ImGM persistent controller object to the first room

Just add the persistent object obj_ImGM to a room, preferrably the first room. This will enable you to call any extension function afterwards. As the object will manage the life-cycle automatically.

Now you can call ImGui functions in your own code!

For Development

See BUILD.md

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🧪 Example Usage

ImGui.Begin("Hello");
ImGui.Text("Welcome to ImGM!");
ImGui.End();

📚 Documentation

See the Docs for:

• Full documentation of the project
• Full guides
• Build instructions
• Extension writing guide
• Explanation of tools
• How to debug
• Known issues ...

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🛠️ Contributing

Pull requests welcome! Check out the CONTRIBUTING.md and Issues for ideas.

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📜 License

This project is licensed under MIT — free to use, modify, and distribute.

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💬 Credits

Created by Kenan Masri

Based on Nommiin's ImGui_GM

Using Omar's Dear ImGui library

Using various ImGui extensions by their authors

Powered by Dear ImGui and the GameMaker community.

Please see the Credits section in ImGui_GM