Bug 180183 – "WebGL: ERROR: unsupported shader version" on WebGL2 shader compile

• Status: RESOLVED
• Resolution: WONTFIX
• Component: WebGL

[Ebrahim Byagowi]

Perhaps WONTFIX as oldness of my device but have a look, seems reported here also https://forums.developer.apple.com/thread/81177

Steps to reproduce:
0. An updated (High Sierra) but old enough Mac with Intel HD 3000 maybe, Safari Technology Preview with WebGL 2.0 enabled.
1. https://tsherif.github.io/webgl2examples/triangle.html

What happens?
"WebGL: ERROR: unsupported shader version" on shaders with "#version 300 es".

OpenGL 3.3 backported features like pipeline location and such from OpenGL 4 supported hardwares to OpenGL 3 so I wonder if the same can happen here.

Firefox raises this message from ANGLE I guess on the same hardware,

`
Error: WebGL warning: Failed to create WebGL context: WebGL creation failed: 
* WebGL 2 requires support for the following features: 
  transform_feedback2
* Exhausted GL driver options.
triangle.html:48:18
`

If that is the case, would be nice if WebKit says it clearly.

I have the same problems, Mac book pro 2017, Radeon Pro 555 2 GB, Intel HD Graphics 630 1536 MB.

[Ebrahim Byagowi]

I at least won't care anymore about getting ANGLE compilation messages on dev tools so let me close this. Thanks :)