[PATCH 2/2] wined3d: Avoid calculating 1 / (fog_end - fog_start) in the shader

[Henri Verbeet]

On 21 June 2013 12:06, Stefan Dösinger <stefan at codeweavers.com> wrote:
> This also works for fog_start == fog_end on drivers that don't handle
> this situation correctly with fixed function fog. Tested on nvidia,
> r300g, r600g.
What does this fix?