[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 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?
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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