Re: [PATCH 02/18] wined3d: Set default sampler minification filter to GL_NEAREST.

[Józef Kucia]

On Mon, Dec 5, 2016 at 12:04 PM, Józef Kucia <jkucia(a)codeweavers.com> wrote:
> This seems to be required for reading stencil values. The GL spec says
> "When sampling the stencil index only NEAREST filtering is supported.".
> The GL spec is inconsistent about this, but Mesa refuses to sample
> stencil index values with the GL_NEAREST_MIPMAP_NEAREST filter.

The NEAREST_MIPMAP_NEAREST is going to be allowed in Mesa (there is a
patch for this [1]). However, the ARB_stencil_texturing spec was never
updated, and an implementation of OpenGL which does not expose GL 4.5
doesn't have to allow using NEAREST_MIPMAP_NEAREST for stencil
texturing.

[1] - https://lists.freedesktop.org/archives/mesa-dev/2016-December/137309.html