Which of the backends are most portable?

[dicroce]

I have a windows / linux app (https://github.com/dicroce/revere) that uses imgui. So far, I have used the glfw + opengl backends. I had hoped this would be the most portable choice... but I am running into glfw issues when trying to create a window inside of virtualbox vm's. Virtualbox does not properly support opengl applications.

I tried using a GDI renderer I found online but it doesn't look like it supports Image() (which I absolutely need).

So far, all of the software renderer backends I've seen also lack support for using custom textures (needed for Image() I believe).

It's frustrating because it really does seem like if imgui_impl_win32 + software renderer (and likewise an imgui_impl_x11 + software renderer) would provide the most portable solution.

So, I guess my final question is: Is there some combination of backends that I could use on Windows (and a corresponding pair I could use on linux) that will be more likely to work out of the box than glfw + opengl?

[Zelif]

I would be inclined to try out SDL2 as it can fall back to software rendering
https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_sdlrenderer2/

I haven't tried this but have seen that there is an openGL software renderer Mesa3D which might be handy. (You can drop in and override the default openGl 1.1 dll in windows)

I have seen some posts about virtualbox supporting openGL 2.1, dx3d8/9
From this post:
https://forums.virtualbox.org/viewtopic.php?t=82614&start=15
It seems like openGL should work with their newer versions that support the VBoxSVGA driver for windows and VMSVGA for linux.

GLFW not starting in a VM to me sounds more like a glfw issue, older versions of virtualbox seems to support openGL2.1 which should work, I tend to like SDL over glfw in older/limited stuff like this, I find it handles across a little more stuff.

Seems like a cool project kinda need a camera interface for some older onvif cameras :D

[tsl0922]

Another choice: https://github.com/google/angle

I'm compiling my app with OpenGL ES + angle on Windows: tsl0922/ImPlay#15

[ocornut]

Closing as answered.

I tried using a GDI renderer I found online but it doesn't look like it supports Image() (which I absolutely need).

You could add support for it in the renderer.

DX11 also support software rendering mode via WARP.