[Webkit-unassigned] [Bug 180183] New: "WebGL: ERROR: unsupported shader version" on WebGL2 shader compile

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180183

            Bug ID: 180183
           Summary: "WebGL: ERROR: unsupported shader version" on WebGL2
                    shader compile
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ebrahim at gnu.org
                CC: dino at apple.com

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.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20171130/4968372a/attachment-0001.html>