891204 - GFX shaders fail to compile when creating a OpenGL 3.2 Core profile

Status: RESOLVED FIXED

(Core :: Graphics: Layers, defect)

Description

[Guillaume Abadie]

Attachment: mozilla abort log

WebGL 2 prototype require an OpenGL 3.0 context or higher.

On Mac OS X, to get a OpenGL 3.0 context, we have to create a 3.2 core profile. But shaders are not compatible with 3.2 core profile.

Note that some WebGL 2 features like sampler objects would need a 3.3 context if note available by extension. So on Mac OS X, we would need to create a 4.3 context because they are only Core Profile.

To reproduce the bug, add the 2 following lines in GLContextProviderCGL.mm:62 :
NSOpenGLPFAOpenGLProfile,
NSOpenGLProfileVersion3_2Core,

Can surly be reproduced on other OS by the same way.

Comment 1

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

You may be able to get around this by adding a "#version 110" to the start of each shader in the text file (or modifying the script that generates the header file to insert it, which would be easier)

Comment 2

[Kelsey Gilbert [:jgilbert]]

Vlad's suggestion should work as the short-term fix for this.

Comment 3

[Guillaume Abadie]

(In reply to Vladimir Vukicevic [:vlad] [:vladv] from comment #1)
> You may be able to get around this by adding a "#version 110" to the start
> of each shader in the text file (or modifying the script that generates the
> header file to insert it, which would be easier)

That doesn't work either, I'm getting :
ERROR: 0:2: '' :  version '110' is not supported
ERROR: 0:3: '' :  #version required and missing.
ERROR: 0:18: 'varying' : syntax error syntax error

I think it's because the 3.2 core profile is only looking for GLSL 1.5.

Comment 4

[Kelsey Gilbert [:jgilbert]]

GLSL preprocessor commands are a little weird. Check out this post about a similar problem on Mac:
http://stackoverflow.com/questions/8540489/glsl-version-gives-syntax-error-lwjgl-on-mac

Alternatively, check the 3.2 spec and GLSL specs themselves.