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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [SKL] ES2-CTS.gtf.GL2ExtensionTests.compressed_astc_texture.compressed_astc_texture fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92193#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [SKL] ES2-CTS.gtf.GL2ExtensionTests.compressed_astc_texture.compressed_astc_texture fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92193">bug 92193</a>
from <span class="vcard"><a class="email" href="mailto:nanleychery@gmail.com" title="Nanley Chery <nanleychery@gmail.com>"> <span class="fn">Nanley Chery</span></a>
</span></b>
<pre>(In reply to Tapani Pälli from <a href="show_bug.cgi?id=92193#c5">comment #5</a>)
<span class="quote">> (In reply to Nanley Chery from <a href="show_bug.cgi?id=92193#c4">comment #4</a>)
> > 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?</span >
I just filed the bug (and attached the patch)
<a href="https://www.khronos.org/bugzilla/show_bug.cgi?id=1395">https://www.khronos.org/bugzilla/show_bug.cgi?id=1395</a> . Thanks for the tip. Is
there anything else we should do?</pre>
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