[PATCH 2/4] gdiplus: Partially implement arrow caps

[Henri Verbeet]

Well, floating-point math is a pain.

On 14 May 2018 at 18:44, Vincent Povirk <vincent at codeweavers.com> wrote:
> OK, assuming the same exponent, I guess that works. You'd have to be
> careful to avoid test data that's close to a power of 2.
>
No, that works. Adjacent (regular) IEEE floats have adjacent integer
representations. The cases where it breaks down are things like
denormals, NaNs and infinities.

> I'm not sure about the assumption that float and int are the same size.
>
They are everywhere we care about. I suppose you could introduce a
C_ASSERT to make sure, but I suspect a whole bunch of other stuff
would also break in case either integers or floats aren't 32-bits.

> I'm also not clear on why you subtract "negative" values from INT_MIN.
> What case is that accounting for, and what does it mean?
>
It's accounting for the case where you're comparing floating point
numbers of opposite signs.