On Thu, Oct 22, 2015 at 12:03 PM, Nicolai Hähnle <nhaeh...@gmail.com> wrote: > On 22.10.2015 15:57, Fredrik Höglund wrote: >> >> On Thursday 22 October 2015, Nicolai Hähnle wrote: >>> >>> The same clamping already happens for glTexParameteri. This change >>> also fixes a bug in mipmap generation, see >>> https://bugs.freedesktop.org/show_bug.cgi?id=91993 >> >> >> I don't think this patch is correct. The ARB_texture_view specification >> doesn't say that MaxLevel should be initialized to the value of >> TEXTURE_IMMUTABLE_LEVELS, only that it's interpreted relative to >> the view and not relative to the original data store. >> >> Liam Middlebrook also pointed out recently that the clamping done >> in glTexParameteri is in fact a bug: >> >> http://lists.freedesktop.org/archives/piglit/2015-June/016342.html >> >> The language in the specification that says that MaxLevel is clamped >> when the texture is immutable applies to texture minification, >> magnification, and texture completeness; not to gl*Tex*Parameter*. > > > Ugh. I was torn between those two interpretations. I suppose nobody was > confident enough to change gl*Tex*Parameter* either ;) > > Thinking more on this, there is also a problematic interaction between > glTextureView and glGenerate*Mipmap when the view does not extend to the > highest level in the underlying texture. Clearly, this part of the spec > could use some cleanups. > > Any chance of an "official" clarification? I did not find corresponding > Issues in the corresponding extensions.
Check the actual GL spec -- a lot of the time such things are clarified in there. > What are non-Mesa drivers doing? Write some piglits and find out? :) -ilia _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
