[Bug 92193] [SKL] ES2-CTS.gtf.GL2ExtensionTests.compressed_astc_texture.compressed_astc_texture fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92193

--- Comment #6 from Nanley Chery <nanleychery at gmail.com> ---
(In reply to Tapani Pälli from comment #5)
> (In reply to Nanley Chery from comment #4)
> > Looks like there's a bug in the CTS. It looks for the ASTC formats in the
> > list returned by glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, ...). As
> > mentioned in spec, the ASTC format enums won't be returned by this function:
> > 
> > Interactions with OpenGL 4.2
> > 
> >     OpenGL 4.2 supports the feature that compressed textures can be
> >     compressed online, by passing the compressed texture format enum as
> >     the internal format when uploading a texture using TexImage1D,
> >     TexImage2D or TexImage3D (see Section 3.9.3, Texture Image
> >     Specification, subsection Encoding of Special Internal Formats).
> > 
> >     Due to the complexity of the ASTC compression algorithm, it is not
> >     usually suitable for online use, and therefore ASTC support will be
> >     limited to pre-compressed textures only. Where on-device compression
> >     is required, a domain-specific limited compressor will typically
> >     be used, and this is therefore not suitable for implementation in
> >     the driver.
> > 
> >     In particular, the ASTC format specifiers will not be added to
> >     Table 3.14, and thus will not be accepted by the TexImage*D
> >     functions, and will not be returned by the (already deprecated)
> >     COMPRESSED_TEXTURE_FORMATS query.
> > 
> > I'll send a patch upstream to fix this. Should I take any further steps?
> 
> This sounds good, did you file a bug in Khronos bugzilla?

I just filed the bug (and attached the patch)
https://www.khronos.org/bugzilla/show_bug.cgi?id=1395 . Thanks for the tip. Is
there anything else we should do?

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