rlImGui

rlImGui

A Raylib integration with DearImGui

rlImgui provides a backend for Dear ImGui using Raylib.

Setup

Using rlImGui in your code is very easy. Once you have included the library, or source files for rlImGui and ImGui in your project, simply do the following.

#include "rlImGui.h"	// include the API header

// before your game loop
rlImGuiSetup(true); 	// sets up ImGui with ether a dark or light default theme

// inside your game loop, between BeginDrawing() and EndDrawing()
rlImGuiBegin();			// starts the ImGui content mode. Make all ImGui calls after this

rlImGuiEnd();			// ends the ImGui content mode. Make all ImGui calls before this

// after your game loop is over, before you close the window

rlImGuiShutdown();		// cleans up ImGui

Examples

There are two example programs in the examples folder.

Simple

This is the most simple use of ImGui in raylib, it just shows the ImGui demo window.

Editor

This is a more complex example of ImGui, showing how to use raylib 2d and 3d cameras to draw into ImGui windows using render textures.

Extras

rlImGuiColors.h

This file has a converter to change Raylib colors into ImGui Colors

Icon Fonts

The extras folder has files to help add icon fonts into ImGui. Functions to load the font and #defines for the font glyps are included in each header.

Font Awesome

This is a header in the extras folder to add icons from Font Awesome into ImGui. https://fontawesome.com/ Simply call the add function to include the fonts in ImGui

rlImGuiAddFontAwesomeIconFonts(12); 

ForkAwesome

This is a header in the extras folder to add icons from Fork Awesome into ImGui. https://forkaweso.me/Fork-Awesome/ Simply call the add function to include the fonts in ImGui

rlImGuiAddForkAwesomeIconFonts(12); 

Images

Raylib textures can be drawn in ImGui using the following functions

void rlImGuiImage(const Texture *image);
void rlImGuiImageSize(const Texture *image, int width, int height);
void rlImGuiImageRect(const Texture* image, int destWidth, int destHeight, Rectangle sourceRect);

C vs C++

ImGui is a C++ library, so rlImGui uses C++ to create the backend and integration with Raylib. The rlImGui.h API only uses features that are common to C and C++, so rlImGui can be built as a static library and used by pure C code. Users of ImGui who wish to use pure C must use an ImGui wrapper, such as [https://github.com/cimgui/cimgui].