d3dx9: CloneMesh test and improvements

[Michael Mc Donnell]

On Thu, Aug 11, 2011 at 4:07 PM, Michael Mc Donnell
<michael at mcdonnell.dk> wrote:
> On Thu, Aug 11, 2011 at 3:01 PM, Matteo Bruni <matteo.mystral at gmail.com> wrote:
>> 2011/8/11 Michael Mc Donnell <michael at mcdonnell.dk>:
>>>
>>> +            dst_ptr[0] = src->x < 0.0f ? (SHORT)ceilf(src->x * SHRT_MAX + 0.5f) :(SHORT)floorf(src->x * SHRT_MAX + 0.5f);
>>
>> You can use roundf() instead. Actually, notice that maybe what you
>> actually need for correct rounding is rintf() (which essentially
>> matches what D3DXFloat32To16Array does). You should probably test this
>> (even on your own, not necessarily adding those to the testsuite, I'd
>> say).
>
> Ok I'll look into that. I also noticed that I had a bug in the UBYTE4
> conversion. I'll modify the tests to catch those cases.

Is it ok to use roundf and rintf? They're both C99 functions [1].

[1] http://en.wikipedia.org/wiki/Math.h