• ImGuin
  • Screen shot
  • Prerequisites
  • Install
  • Available libraries
  • Frontends and Backends
  • Update / Downgrade Dear ImGui and CImGui
  • TODO
  • My tools version
  • Other link

ImGuin

Updated to latest Dear ImGui / CImGui version: : v1.92.0 dock (2025/07)

This project is Dear ImGui wrapper library for Nim language ¹.

Screen shot

---

Note: See examples project ImGuin_examples

tglfw_opengl3.nim

Prerequisites

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• Nim-2.0.16 or later

• Windows10 or later
  MSys2/MinGW command line tools (Unix tools), make, cp, rm, git, ...etc

• Linux: Ubuntu / Debian families

  $ sudo apt install gcc g++ make git 
  $ sudo apt install libopengl-dev libgl1-mesa-dev
  $ sudo apt install libglfw3 libglfw3-dev libsdl2-dev

Install

---

nimble refresh
nimble uninstall imguin  # Remove old versions if exists. 
nimble install imguin

Available libraries

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Library name / C lang. wrapper

• ImGui / CImGui
• ImPlot / CImPlot
• ImNodes / CImNodes
• ImGuizmo / CImGuizmo
• ImGui-Knobs / CImGui-Knobs
• ImGuiFileDialog / CImGuiFileDialog
• ImGui_Toggle / CimGui_Toggle
• ImPlot3d / CImPlot3d
• ImSpinner / CImSpinner
• ImGuiColorTextEdit / cimCTE (2025/03)
• ImGui_Markdown WIP

Frontends and Backends

---

	GLFW 2	SDL2 2	SDL3 2
OpenGL3 backend	v	v	v
SDL2 backend	-	v	-
SDL3 GPU / Renderer backend	-	-	v
Vulkan backend	?	?	?

Update / Downgrade Dear ImGui and CImGui

---

• Prerequisite

  1. Windows10 or later Clang/LLVM refer to Futhark installation.

     nimble install futhark

     It must exist libclang.a file in the library path (e.g. in c:\llvm\lib).

  2. Linux Debian / Ubuntu families

     sudo apt install  clang-16
     nimble install --passL:"-L/usr/lib/llvm-16/lib" futhark

  Important Notice: Confirm Futhark version is v0.15.0 at this time.

  nimble dump futhark

• Update / Downgrade ImGui/CImGui

  1. Compose development folders
     First move to your working folder you like, then

     mkdir imguin_dev
     cd imguin_dev
     git clone https://github.com/dinau/imguin
     cd imguin

  2. Clone ImGui/CImGui etc. sources at once forever

     pwd
     imguin
     make clonelibs

     Cloned libraries are under ../libs/ folder

  3. Recursively update the sources using git Pull or fetch in the each library folder,
     ../libs/cimgui
     ../libs/cimguizmo
     ../libs/cimnodes
     ../libs/cimplot
     ... snip ...

  4. Checkout arbitrary version with git command in the respective folder

  5. Specify your Clang include path to ClangIncludePath in imguin/src/imguin/cimgui.nim.

  6. Generate the definition file uisng Futhark,

     pwd
     imguin
     make gen

  7. Install updated files
     Properly edit the version info etc in imguin.nimble file, then

     pwd
     imguin
     nimble uninstall imguin  # Remove old versions if it exists. 
     nimble install 

     That's all.
     Repeat from 3. if you'd like to update or downgrade to other version.

• Confirmed version
  Windows OS is all OK.

  ImGui/CImGui Ver.	ImGuin Ver.	Date	Linux Debian Family (3)
  1.92.0 dock	1.92.0.1	2025/07	OK
  1.91.9b dock	1.91.9.4	2025/06	OK
  1.91.8dock	1.91.8.2	2025/03	OK
  1.91.6dock	1.91.6.15	2025/01	(4)
  1.91.4dock	1.91.4.2	2024/12	OK
  1.91.3dock	1.91.3.1	2024/10	(4)
  1.91.2dock	1.91.2.0	2024/10	(4)
  1.91.1dock	1.91.1.2	2024/09	Except ImNodes example
  1.91.0dock	1.91.0.0	2024/08	(4)
  1.90.4dock	1.90.4.2	2024/02	Use nim-2.0.2
  1.89.9dock	1.89.9.8	2023/12	OK (1)(2)

  (1) Except imnodes and SDL2 example.
  (2) Works well only if it is compiled debug mode.
  (3) Dedian / Ubuntu familiy.
  (4) Doesn't check, but probably will work well.

TODO

---

1. Whether can it use cimgui.dll ? (Now it can only be static link) Closed. Only be static link.
2. Easier compilation for SDL2 app. (2024/09) Done.
3. Added: ImNodes/CImNodes (2023/10) Done
4. Unfortunately ImGui 1.89.7 dosn't work well at this moment.(2023/07) Done. (2023/08)
5. Whether can it do nimble install imguin ? Done (2023/09) (#Issue 13)
6. Add Font Awesome (Icon Font) demo. Done (2023/04).
7. Can it compile with MSVC (--cc:vcc) ? Done. Except SDL2 demo. (2023/03), TODO (2024/09)
8. Can it compile with Clang (--cc:clang) ? Done. (2023/03)
9. Add SDL2 example. Done. examples/sdl2_opengl3 (2023/03)

• First step is done. (2023/03)

My tools version

---

Windows11 (main)

• Nim Compiler Version 2.2.4

• GCC (Rev1, Built by MSYS2 project) 15.1.0

  pacman -S mingw-w64-ucrt-x86_64-gcc

• Clang version 20.1.7

  pacman -S mingw-w64-ucrt-x86_64-clang

• Visual Studio C++/C 2022

• git version 2.46.0.windows.1

• Make: GNU Make 4.4.1

• MSys2/MinGW tools

Linux Debian

• Nim Compiler Version 2.2.4
• gcc 12.2.0
• make: GNU Make 4.3
• git version 2.39.5

Other link

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• File Dialog

  • Cross Platform File Dialog for Dear-ImGui
  • ImGui File Dialogs - CLI and Client Library
  • A Dear ImGui based File Dialog without any extra dependencies

• Other

  • Node Editor built using Dear ImGui

• GUI

  • nuklear-nim (Public archived)

• Graphical

  • Immediate Mode Plotting

• Similar project ImGui / CImGui

Language 3		Project
Lua	Script	LuaJITImGui
NeLua	Compiler	NeLuaImGui
Nim	Compiler	ImGuin, Nimgl_test, Nim_implot
Python	Script	DearPyGui for 32bit WindowsOS Binary
Ruby	Script	igRuby_Examples
Zig, C lang.	Compiler	Dear_Bindings_Build
Zig	Compiler	ImGuinZ

• SDL Game tutorial Platfromer

  

Language 3		SDL	Project
LuaJIT	Script	SDL2	LuaJIT-Platformer
Nelua	Compiler	SDL2	NeLua-Platformer
Nim	Compiler	SDL3 / SDL2	Nim-Platformer-sdl2/ Nim-Platformer-sdl3
Ruby	Script	SDL3	Ruby-Platformer
Zig	Compiler	SDL2	Zig-Platformer

• Other link2

  • https://github.com/SpartanJ/SOIL2
    SOIL2 is a tiny C library used primarily for uploading textures into OpenGL.

• Memo

  error: assignment to 'char **' from incompatible pointer type 'const char * const*' [-Wincompatible-pointer-types]

  type ConstCstring {.importc: const char *.} = cstring

Footnotes

1. It may be better to use the mainstream project nimgl/imgui (ImGui v1.85)
   ,updated project nimgl-imgui (ImGui v1.89.9) ,sub project nim_implot and test project nimgl_test,
   or https://github.com/daniel-j/nimgl-imgui (ImGui v1.91.1) ↩

2. Front end ↩ ↩² ↩³

3. Alphabectial order ↩ ↩²