Dear ImGui

https://github.com/ocornut/imgui

Here is a rough guide how to get it running using SDL2 or 3.

* Common

imconfig.h:

To fix colors, add:

#define IM_COL32_R_SHIFT 24
#define IM_COL32_G_SHIFT 16
#define IM_COL32_B_SHIFT 8
#define IM_COL32_A_SHIFT 0
#define IM_COL32_A_MASK 0x000000FF

Enable following to avoid code which uses fork():

#define IMGUI_DISABLE_DEFAULT_SHELL_FUNCTIONS

* MiniGL (example_sdl2_opengl2)

main.cpp:

Modify GL version to supported:

SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);

* OpenGLES 2 (example_sdl2_opengl3, example_sdl3_opengl3)

Makefile:

Add:

-DIMGUI_IMPL_OPENGL_ES2

Demo: https://capehill.kapsi.fi/imgui/imgui_amigaos4.lha (MiniGL or OpenGLES2 required).

@Capehill

Does this mean we could have Aira Force also running on AmigaOS4?

I've compiled a lot of software with ImGui. It is working very well under Gl4es

@Capehill

Works fine here on SAM460ex +RX550
Great job.

example_sdl3_opengl3 opens in a minimal size window (100x150), the other ones open full size window

Spacecadet Pinball which is on OS4Dev also uses a basic imgui gui.

@FlynnTheAvatar

I suppose you mean the A500 emulator. Is it open source? I heard about that today so I can't say much.

@afxgroup

I'm planning to use this with some of my own software if I ever find time to work on those :/

@jabirulo

Yes, need to investigate is it SDL3 or ImGui issue.

@rjd324

Cool. I have tried Spacecadet but didn't realize that at time. Does it use OpenGL context or SDL_renderer backend? I noticed ImGui's SDL_Renderer uses geometry calls which cannot be properly implemented with CompositeTags due to missing vertex colors. Of course software, OpenGL or OpenGLES2 work with SDL_renderer too.

@Capehill
https://github.com/3246251196/SpaceCadetPinball