nanovg without hello_imgui

[Yves33]

Hello, Is there a way to use nanovg with pure python backends (glfw)? (it works for imnodes and implot) It seems that the functions required to setup contexts are missing from the bindings.

nvgCreateGL2()
nvgCreateGL3()
nvgSetupGL2()
nvgSetupGL3()

[pthom]

Hello,

It will not be possible to access nanovg from a pure python backend.

After a long investigation, I found that any call to openGL functions will fail on the C++ side since no OpenGL loader was initialized on this side (OpenGL and glfw ared only initialized on the Python side).

Getting this to work would require

• passing glfw.get_proc_address from python to C++
• initializing the glad loader on the C++ side from this address, and hope for the best

I tried it, it failed, and I later gave up, since this is getting way tricky.

[Yves33]

Thanks for investigating. I'll investigate using python_nanovg bindings from scratch. Great job anyway!

Edit:
I was able to use nanovg in combination with imgui_bundle in a pure glfw backend using bindings from https://github.com/inniyah/nanovg
Which raises the following questions/suggestions:

• Would it be possible to build imgui_bundle (python bindings) without nanovg (in order to avoid duplicating nanovg code)
• More generally, it would be great if it was possible to build only with imgui related stuff: (no Hello_imgui, no im_app, no emscripten and no android/ios support), and choose module im* modules to be included (maybe a stripped down version of this repo with only imgui-implot-imnodes) and instructions to add other modules