Re: [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(a)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?

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

[Stefan Dösinger]

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Am 2013-06-21 13:05, schrieb Henri Verbeet:
> On 21 June 2013 12:06, Stefan Dösinger <stefan(a)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?
> > It's a minor GPU-side performance improvement. It's not visible in any
> > real application I tested, but it improves my World of Tanks shader
> > test with fog forced on from 155 to 160 fps (GeForce 9600, Linux, Nvidia).

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