wasm support for Qt3D

LorenzE

Re: Is Qt 5.12 for WebAssembly 3d module supported?

Hey there,

I was wondering if there are any plans to add wasm support for Qt3D. I saw that qt can now be compiled with the -feature-thread flag when configuring for wasm.

Thanks,

Lorenz

lorn.potter

I believe that Qt3D requires OpenGL desktop version, whereas, Qt Webssembly only supports OpenGL ES2/ES3.

LorenzE

Thanks for the insights @lorn-potter. I indeed tried to configure Qt for wasm with the -opengl flag once and still only got ES2/ES3 support. I am pretty new to wasm. Are there any reasons why only ES2 and ES3 are supported?

lorn.potter

Yes, because opengl calls get transpiled into WebGL, which is based on OpenGL ES 2/3, although has more strict rules.
You can get emscripten to emulate older desktop OpenGL 1 calls though.

https://emscripten.org/docs/porting/multimedia_and_graphics/OpenGL-support.html

Delphi251189

@lorn-potter
This post was done on Nov 2019: waht about the same question for now?
AFAIK, Qt3D no more depends on OpenGL: instead it renders via RHI backend.
So, is it possible now to make Qt3D work on WebAssembly?