02:14 <lina> alyssa: ^^

02:14 <lina> alyssa: we need to align to the "full" miptree <- didn't we do this already? I'm pretty sure I sent that patch to always allocate full miptrees...

02:16 <alyssa> lina: You did :)

02:16 <alyssa> lina: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21114

02:16 <alyssa> (top patch)

02:16 <alyssa> the bug only happens for GL_TEXTURE_3D

02:20 <lina> Ohhhh so for 3D textures the Z dimension also goes into the mipmaps. That makes perfect sense and answers some questions I had.

02:20 <lina> So does that mean 3D and arrays are *not* the same as far as the hardware is concerned?

02:21 <alyssa> This is the 1 difference we know about so far

02:21 <alyssa> hopefully the only one :D

02:25 <lina> ^^

02:28 <lina> Do we know how the mipmaps work in the Z direction? I don't know what OpenGL says, but I imagine if you're mipmapping in 3D you'd also decimate in the Z direction... obviously in memory you don't do that, but do we still have to do it during mip generation (and are we doing it properly now)?

02:28 <lina> Like I'd expect something like every 2 layers to have identical averaged out mip level 1s, every 4 layers for level 2s, etc. (or something like that)

02:37 <alyssa> We're doing it properly

02:37 <alyssa> or rather

02:37 <alyssa> we're not doing it, mesa is

02:37 <alyssa> :)

02:38 <lina> Cool ^^