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LibGfx: Specialize Rect::to_rounded a bit more

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We were always calling llround[fd], even for floating point targets.
Also for rounding to integer, we don't need to have C99's rounding rules
and can just cast, assuming the standard rounding mode.
This commit is contained in:
Hendiadyoin1 2022-04-13 21:51:27 +02:00 • committed by Linus Groh
commit 65f57efb5b
Notes: sideshowbarker 2024-07-17 11:12:10 +09:00
1 changed files with 34 additions and 12 deletions
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46
Userland/Libraries/LibGfx/Rect.h
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@ -697,24 +697,46 @@ public:
return Rect<U>(*this);
}
template<typename U>
template<FloatingPoint U>
[[nodiscard]] ALWAYS_INLINE Rect<U> to_rounded() const
{
// FIXME: We may get away with `rint[lf]?()` here.
// This would even give us some more control of these internals,
// while the break-tie algorithm does not really matter
if constexpr (IsSame<T, float>) {
return {
static_cast<U>(llroundf(x())),
static_cast<U>(llroundf(y())),
static_cast<U>(llroundf(width())),
static_cast<U>(llroundf(height())),
};
} else {
return {
static_cast<U>(llroundd(x())),
static_cast<U>(llroundd(y())),
static_cast<U>(llroundd(width())),
static_cast<U>(llroundd(height())),
static_cast<U>(roundf(x())),
static_cast<U>(roundf(y())),
static_cast<U>(roundf(width())),
static_cast<U>(roundf(height())),
};
}
if constexpr (IsSame<T, double>) {
return {
static_cast<U>(round(x())),
static_cast<U>(round(y())),
static_cast<U>(round(width())),
static_cast<U>(round(height())),
};
}
return {
static_cast<U>(roundl(x())),
static_cast<U>(roundl(y())),
static_cast<U>(roundl(width())),
static_cast<U>(roundl(height())),
};
}
template<Integral I>
ALWAYS_INLINE Rect<I> to_rounded() const
{
return {
round_to<I>(x()),
round_to<I>(y()),
round_to<I>(width()),
round_to<I>(height()),
};
}
[[nodiscard]] String to_string() const;