imgui 0.0.23

High-level Rust bindings to dear imgui

imgui-rs: Rust bindings for ImGui

Still fairly experimental!

Minimum Rust version: 1.31

Wrapped Dear ImGui version: 1.66b

Build Status Latest release on Documentation on

Hello world

ui.window(im_str!("Hello world"))
    .size((300.0, 100.0), ImGuiCond::FirstUseEver)
    .build(|| {
        ui.text(im_str!("Hello world!"));
        let mouse_pos = ui.imgui().mouse_pos();
        ui.text(im_str!("Mouse Position: ({:.1},{:.1})", mouse_pos.0, mouse_pos.1));

Currently implemented things

  • Low-level API (imgui-sys)
  • Renderer for easy integration with Glium projects (optional)
  • Parts of high-level API
  • Not horrible way of defining and passing null-terminated UTF-8 to ImGui. The macro im_str! needs to be used most of the time. For more information and justification for this design, please see issue #7
  • Parts of imgui_demo.cpp reimplemented in Rust as an API usage example (examples/

Important but unimplemented things

  • Documentation (rustdoc)
  • Support passing a custom Program to Glium renderer (e.g. from a shader cache, or custom shader)

Core design questions and current choices

  • Closures VS begin/end pairs (current choice: closures)
  • Mutable references VS return values (current choice: mutable references)
  • Passing around Ui<'ui> VS passing around &'ui Ui (current choice: Ui<'ui>)
  • Splitting the API to smaller pieces VS all draw calls in Ui (current choice: all draw calls in Ui)
  • Builder pattern for optional arguments VS something else (current choice: builder)
  • Mutation functions in builders VS self-consuming functions in builders (current choice: self-consuming)

Compiling and running the demos

git clone
cd imgui-rs
git submodule update --init --recursive

Examples for gfx backend are under the imgui-examples directory.

cd imgui-examples
cargo test

cargo run --example hello_gfx

Examples for glium backend are located into the imgui-glium-examples directory.

# At the reposity root
cd imgui-glium-examples
cargo test

cargo run --example hello_world
cargo run --example test_window
cargo run --example test_window_impl

Note to Windows users: You will need to use the MSVC ABI version of the Rust compiler along with its associated dependencies to build this libary and run the examples.

How to contribute

  1. Change or add something

  2. Run rustfmt to guarantee code style conformance

     rustup component add rustfmt-preview
     cargo fmt
  3. Open a pull request in Github


Licensed under either of

at your option.

Uses ImGui and cimgui.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.