Source code
Revision control
Copy as Markdown
Other Tools
// Copyright 2013 The Servo Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use super::UnknownUnit;
use crate::box2d::Box2D;
use crate::num::*;
use crate::point::Point2D;
use crate::scale::Scale;
use crate::side_offsets::SideOffsets2D;
use crate::size::Size2D;
use crate::vector::Vector2D;
#[cfg(feature = "bytemuck")]
use bytemuck::{Pod, Zeroable};
use num_traits::{Float, NumCast};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use core::borrow::Borrow;
use core::cmp::PartialOrd;
use core::fmt;
use core::hash::{Hash, Hasher};
use core::ops::{Add, Div, DivAssign, Mul, MulAssign, Range, Sub};
/// A 2d Rectangle optionally tagged with a unit.
///
/// # Representation
///
/// `Rect` is represented by an origin point and a size.
///
/// See [`Box2D`] for a rectangle represented by two endpoints.
///
/// # Empty rectangle
///
/// A rectangle is considered empty (see [`is_empty`]) if any of the following is true:
/// - it's area is empty,
/// - it's area is negative (`size.x < 0` or `size.y < 0`),
/// - it contains NaNs.
///
/// [`is_empty`]: #method.is_empty
/// [`Box2D`]: struct.Box2D.html
#[repr(C)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(
feature = "serde",
serde(bound(serialize = "T: Serialize", deserialize = "T: Deserialize<'de>"))
)]
pub struct Rect<T, U> {
pub origin: Point2D<T, U>,
pub size: Size2D<T, U>,
}
#[cfg(feature = "arbitrary")]
impl<'a, T, U> arbitrary::Arbitrary<'a> for Rect<T, U>
where
T: arbitrary::Arbitrary<'a>,
{
fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
let (origin, size) = arbitrary::Arbitrary::arbitrary(u)?;
Ok(Rect { origin, size })
}
}
#[cfg(feature = "bytemuck")]
unsafe impl<T: Zeroable, U> Zeroable for Rect<T, U> {}
#[cfg(feature = "bytemuck")]
unsafe impl<T: Pod, U: 'static> Pod for Rect<T, U> {}
impl<T: Hash, U> Hash for Rect<T, U> {
fn hash<H: Hasher>(&self, h: &mut H) {
self.origin.hash(h);
self.size.hash(h);
}
}
impl<T: Copy, U> Copy for Rect<T, U> {}
impl<T: Clone, U> Clone for Rect<T, U> {
fn clone(&self) -> Self {
Self::new(self.origin.clone(), self.size.clone())
}
}
impl<T: PartialEq, U> PartialEq for Rect<T, U> {
fn eq(&self, other: &Self) -> bool {
self.origin.eq(&other.origin) && self.size.eq(&other.size)
}
}
impl<T: Eq, U> Eq for Rect<T, U> {}
impl<T: fmt::Debug, U> fmt::Debug for Rect<T, U> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Rect(")?;
fmt::Debug::fmt(&self.size, f)?;
write!(f, " at ")?;
fmt::Debug::fmt(&self.origin, f)?;
write!(f, ")")
}
}
impl<T: Default, U> Default for Rect<T, U> {
fn default() -> Self {
Rect::new(Default::default(), Default::default())
}
}
impl<T, U> Rect<T, U> {
/// Constructor.
#[inline]
pub const fn new(origin: Point2D<T, U>, size: Size2D<T, U>) -> Self {
Rect { origin, size }
}
}
impl<T, U> Rect<T, U>
where
T: Zero,
{
/// Constructor, setting all sides to zero.
#[inline]
pub fn zero() -> Self {
Rect::new(Point2D::origin(), Size2D::zero())
}
/// Creates a rect of the given size, at offset zero.
#[inline]
pub fn from_size(size: Size2D<T, U>) -> Self {
Rect {
origin: Point2D::zero(),
size,
}
}
}
impl<T, U> Rect<T, U>
where
T: Copy + Add<T, Output = T>,
{
#[inline]
pub fn min(&self) -> Point2D<T, U> {
self.origin
}
#[inline]
pub fn max(&self) -> Point2D<T, U> {
self.origin + self.size
}
#[inline]
pub fn max_x(&self) -> T {
self.origin.x + self.size.width
}
#[inline]
pub fn min_x(&self) -> T {
self.origin.x
}
#[inline]
pub fn max_y(&self) -> T {
self.origin.y + self.size.height
}
#[inline]
pub fn min_y(&self) -> T {
self.origin.y
}
#[inline]
pub fn width(&self) -> T {
self.size.width
}
#[inline]
pub fn height(&self) -> T {
self.size.height
}
#[inline]
pub fn x_range(&self) -> Range<T> {
self.min_x()..self.max_x()
}
#[inline]
pub fn y_range(&self) -> Range<T> {
self.min_y()..self.max_y()
}
/// Returns the same rectangle, translated by a vector.
#[inline]
#[must_use]
pub fn translate(&self, by: Vector2D<T, U>) -> Self {
Self::new(self.origin + by, self.size)
}
#[inline]
pub fn to_box2d(&self) -> Box2D<T, U> {
Box2D {
min: self.min(),
max: self.max(),
}
}
}
impl<T, U> Rect<T, U>
where
T: Copy + PartialOrd + Add<T, Output = T>,
{
/// Returns true if this rectangle contains the point. Points are considered
/// in the rectangle if they are on the left or top edge, but outside if they
/// are on the right or bottom edge.
#[inline]
pub fn contains(&self, p: Point2D<T, U>) -> bool {
self.to_box2d().contains(p)
}
#[inline]
pub fn intersects(&self, other: &Self) -> bool {
self.to_box2d().intersects(&other.to_box2d())
}
}
impl<T, U> Rect<T, U>
where
T: Copy + PartialOrd + Add<T, Output = T> + Sub<T, Output = T>,
{
#[inline]
pub fn intersection(&self, other: &Self) -> Option<Self> {
let box2d = self.to_box2d().intersection_unchecked(&other.to_box2d());
if box2d.is_empty() {
return None;
}
Some(box2d.to_rect())
}
}
impl<T, U> Rect<T, U>
where
T: Copy + Add<T, Output = T> + Sub<T, Output = T>,
{
#[inline]
#[must_use]
pub fn inflate(&self, width: T, height: T) -> Self {
Rect::new(
Point2D::new(self.origin.x - width, self.origin.y - height),
Size2D::new(
self.size.width + width + width,
self.size.height + height + height,
),
)
}
}
impl<T, U> Rect<T, U>
where
T: Copy + Zero + PartialOrd + Add<T, Output = T>,
{
/// Returns true if this rectangle contains the interior of rect. Always
/// returns true if rect is empty, and always returns false if rect is
/// nonempty but this rectangle is empty.
#[inline]
pub fn contains_rect(&self, rect: &Self) -> bool {
rect.is_empty()
|| (self.min_x() <= rect.min_x()
&& rect.max_x() <= self.max_x()
&& self.min_y() <= rect.min_y()
&& rect.max_y() <= self.max_y())
}
}
impl<T, U> Rect<T, U>
where
T: Copy + Zero + PartialOrd + Add<T, Output = T> + Sub<T, Output = T>,
{
/// Calculate the size and position of an inner rectangle.
///
/// Subtracts the side offsets from all sides. The horizontal and vertical
/// offsets must not be larger than the original side length.
/// This method assumes y oriented downward.
pub fn inner_rect(&self, offsets: SideOffsets2D<T, U>) -> Self {
let rect = Rect::new(
Point2D::new(self.origin.x + offsets.left, self.origin.y + offsets.top),
Size2D::new(
self.size.width - offsets.horizontal(),
self.size.height - offsets.vertical(),
),
);
debug_assert!(rect.size.width >= Zero::zero());
debug_assert!(rect.size.height >= Zero::zero());
rect
}
}
impl<T, U> Rect<T, U>
where
T: Copy + Add<T, Output = T> + Sub<T, Output = T>,
{
/// Calculate the size and position of an outer rectangle.
///
/// Add the offsets to all sides. The expanded rectangle is returned.
/// This method assumes y oriented downward.
pub fn outer_rect(&self, offsets: SideOffsets2D<T, U>) -> Self {
Rect::new(
Point2D::new(self.origin.x - offsets.left, self.origin.y - offsets.top),
Size2D::new(
self.size.width + offsets.horizontal(),
self.size.height + offsets.vertical(),
),
)
}
}
impl<T, U> Rect<T, U>
where
T: Copy + Zero + PartialOrd + Sub<T, Output = T>,
{
/// Returns the smallest rectangle defined by the top/bottom/left/right-most
/// points provided as parameter.
///
/// Note: This function has a behavior that can be surprising because
/// the right-most and bottom-most points are exactly on the edge
/// of the rectangle while the `contains` function is has exclusive
/// semantic on these edges. This means that the right-most and bottom-most
/// points provided to `from_points` will count as not contained by the rect.
/// This behavior may change in the future.
pub fn from_points<I>(points: I) -> Self
where
I: IntoIterator,
I::Item: Borrow<Point2D<T, U>>,
{
Box2D::from_points(points).to_rect()
}
}
impl<T, U> Rect<T, U>
where
T: Copy + One + Add<Output = T> + Sub<Output = T> + Mul<Output = T>,
{
/// Linearly interpolate between this rectangle and another rectangle.
#[inline]
pub fn lerp(&self, other: Self, t: T) -> Self {
Self::new(
self.origin.lerp(other.origin, t),
self.size.lerp(other.size, t),
)
}
}
impl<T, U> Rect<T, U>
where
T: Copy + One + Add<Output = T> + Div<Output = T>,
{
pub fn center(&self) -> Point2D<T, U> {
let two = T::one() + T::one();
self.origin + self.size.to_vector() / two
}
}
impl<T, U> Rect<T, U>
where
T: Copy + PartialOrd + Add<T, Output = T> + Sub<T, Output = T> + Zero,
{
#[inline]
pub fn union(&self, other: &Self) -> Self {
self.to_box2d().union(&other.to_box2d()).to_rect()
}
}
impl<T, U> Rect<T, U> {
#[inline]
pub fn scale<S: Copy>(&self, x: S, y: S) -> Self
where
T: Copy + Mul<S, Output = T>,
{
Rect::new(
Point2D::new(self.origin.x * x, self.origin.y * y),
Size2D::new(self.size.width * x, self.size.height * y),
)
}
}
impl<T: Copy + Mul<T, Output = T>, U> Rect<T, U> {
#[inline]
pub fn area(&self) -> T {
self.size.area()
}
}
impl<T: Copy + Zero + PartialOrd, U> Rect<T, U> {
#[inline]
pub fn is_empty(&self) -> bool {
self.size.is_empty()
}
}
impl<T: Copy + Zero + PartialOrd, U> Rect<T, U> {
#[inline]
pub fn to_non_empty(&self) -> Option<Self> {
if self.is_empty() {
return None;
}
Some(*self)
}
}
impl<T: Copy + Mul, U> Mul<T> for Rect<T, U> {
type Output = Rect<T::Output, U>;
#[inline]
fn mul(self, scale: T) -> Self::Output {
Rect::new(self.origin * scale, self.size * scale)
}
}
impl<T: Copy + MulAssign, U> MulAssign<T> for Rect<T, U> {
#[inline]
fn mul_assign(&mut self, scale: T) {
*self *= Scale::new(scale);
}
}
impl<T: Copy + Div, U> Div<T> for Rect<T, U> {
type Output = Rect<T::Output, U>;
#[inline]
fn div(self, scale: T) -> Self::Output {
Rect::new(self.origin / scale.clone(), self.size / scale)
}
}
impl<T: Copy + DivAssign, U> DivAssign<T> for Rect<T, U> {
#[inline]
fn div_assign(&mut self, scale: T) {
*self /= Scale::new(scale);
}
}
impl<T: Copy + Mul, U1, U2> Mul<Scale<T, U1, U2>> for Rect<T, U1> {
type Output = Rect<T::Output, U2>;
#[inline]
fn mul(self, scale: Scale<T, U1, U2>) -> Self::Output {
Rect::new(self.origin * scale.clone(), self.size * scale)
}
}
impl<T: Copy + MulAssign, U> MulAssign<Scale<T, U, U>> for Rect<T, U> {
#[inline]
fn mul_assign(&mut self, scale: Scale<T, U, U>) {
self.origin *= scale.clone();
self.size *= scale;
}
}
impl<T: Copy + Div, U1, U2> Div<Scale<T, U1, U2>> for Rect<T, U2> {
type Output = Rect<T::Output, U1>;
#[inline]
fn div(self, scale: Scale<T, U1, U2>) -> Self::Output {
Rect::new(self.origin / scale.clone(), self.size / scale)
}
}
impl<T: Copy + DivAssign, U> DivAssign<Scale<T, U, U>> for Rect<T, U> {
#[inline]
fn div_assign(&mut self, scale: Scale<T, U, U>) {
self.origin /= scale.clone();
self.size /= scale;
}
}
impl<T: Copy, U> Rect<T, U> {
/// Drop the units, preserving only the numeric value.
#[inline]
pub fn to_untyped(&self) -> Rect<T, UnknownUnit> {
Rect::new(self.origin.to_untyped(), self.size.to_untyped())
}
/// Tag a unitless value with units.
#[inline]
pub fn from_untyped(r: &Rect<T, UnknownUnit>) -> Rect<T, U> {
Rect::new(
Point2D::from_untyped(r.origin),
Size2D::from_untyped(r.size),
)
}
/// Cast the unit
#[inline]
pub fn cast_unit<V>(&self) -> Rect<T, V> {
Rect::new(self.origin.cast_unit(), self.size.cast_unit())
}
}
impl<T: NumCast + Copy, U> Rect<T, U> {
/// Cast from one numeric representation to another, preserving the units.
///
/// When casting from floating point to integer coordinates, the decimals are truncated
/// as one would expect from a simple cast, but this behavior does not always make sense
/// geometrically. Consider using round(), round_in or round_out() before casting.
#[inline]
pub fn cast<NewT: NumCast>(&self) -> Rect<NewT, U> {
Rect::new(self.origin.cast(), self.size.cast())
}
/// Fallible cast from one numeric representation to another, preserving the units.
///
/// When casting from floating point to integer coordinates, the decimals are truncated
/// as one would expect from a simple cast, but this behavior does not always make sense
/// geometrically. Consider using round(), round_in or round_out() before casting.
pub fn try_cast<NewT: NumCast>(&self) -> Option<Rect<NewT, U>> {
match (self.origin.try_cast(), self.size.try_cast()) {
(Some(origin), Some(size)) => Some(Rect::new(origin, size)),
_ => None,
}
}
// Convenience functions for common casts
/// Cast into an `f32` rectangle.
#[inline]
pub fn to_f32(&self) -> Rect<f32, U> {
self.cast()
}
/// Cast into an `f64` rectangle.
#[inline]
pub fn to_f64(&self) -> Rect<f64, U> {
self.cast()
}
/// Cast into an `usize` rectangle, truncating decimals if any.
///
/// When casting from floating point rectangles, it is worth considering whether
/// to `round()`, `round_in()` or `round_out()` before the cast in order to
/// obtain the desired conversion behavior.
#[inline]
pub fn to_usize(&self) -> Rect<usize, U> {
self.cast()
}
/// Cast into an `u32` rectangle, truncating decimals if any.
///
/// When casting from floating point rectangles, it is worth considering whether
/// to `round()`, `round_in()` or `round_out()` before the cast in order to
/// obtain the desired conversion behavior.
#[inline]
pub fn to_u32(&self) -> Rect<u32, U> {
self.cast()
}
/// Cast into an `u64` rectangle, truncating decimals if any.
///
/// When casting from floating point rectangles, it is worth considering whether
/// to `round()`, `round_in()` or `round_out()` before the cast in order to
/// obtain the desired conversion behavior.
#[inline]
pub fn to_u64(&self) -> Rect<u64, U> {
self.cast()
}
/// Cast into an `i32` rectangle, truncating decimals if any.
///
/// When casting from floating point rectangles, it is worth considering whether
/// to `round()`, `round_in()` or `round_out()` before the cast in order to
/// obtain the desired conversion behavior.
#[inline]
pub fn to_i32(&self) -> Rect<i32, U> {
self.cast()
}
/// Cast into an `i64` rectangle, truncating decimals if any.
///
/// When casting from floating point rectangles, it is worth considering whether
/// to `round()`, `round_in()` or `round_out()` before the cast in order to
/// obtain the desired conversion behavior.
#[inline]
pub fn to_i64(&self) -> Rect<i64, U> {
self.cast()
}
}
impl<T: Float, U> Rect<T, U> {
/// Returns true if all members are finite.
#[inline]
pub fn is_finite(self) -> bool {
self.origin.is_finite() && self.size.is_finite()
}
}
impl<T: Floor + Ceil + Round + Add<T, Output = T> + Sub<T, Output = T>, U> Rect<T, U> {
/// Return a rectangle with edges rounded to integer coordinates, such that
/// the returned rectangle has the same set of pixel centers as the original
/// one.
/// Edges at offset 0.5 round up.
/// Suitable for most places where integral device coordinates
/// are needed, but note that any translation should be applied first to
/// avoid pixel rounding errors.
/// Note that this is *not* rounding to nearest integer if the values are negative.
/// They are always rounding as floor(n + 0.5).
///
/// # Usage notes
/// Note, that when using with floating-point `T` types that method can significantly
/// loose precision for large values, so if you need to call this method very often it
/// is better to use [`Box2D`].
///
/// [`Box2D`]: struct.Box2D.html
#[must_use]
pub fn round(&self) -> Self {
self.to_box2d().round().to_rect()
}
/// Return a rectangle with edges rounded to integer coordinates, such that
/// the original rectangle contains the resulting rectangle.
///
/// # Usage notes
/// Note, that when using with floating-point `T` types that method can significantly
/// loose precision for large values, so if you need to call this method very often it
/// is better to use [`Box2D`].
///
/// [`Box2D`]: struct.Box2D.html
#[must_use]
pub fn round_in(&self) -> Self {
self.to_box2d().round_in().to_rect()
}
/// Return a rectangle with edges rounded to integer coordinates, such that
/// the original rectangle is contained in the resulting rectangle.
///
/// # Usage notes
/// Note, that when using with floating-point `T` types that method can significantly
/// loose precision for large values, so if you need to call this method very often it
/// is better to use [`Box2D`].
///
/// [`Box2D`]: struct.Box2D.html
#[must_use]
pub fn round_out(&self) -> Self {
self.to_box2d().round_out().to_rect()
}
}
impl<T, U> From<Size2D<T, U>> for Rect<T, U>
where
T: Zero,
{
fn from(size: Size2D<T, U>) -> Self {
Self::from_size(size)
}
}
/// Shorthand for `Rect::new(Point2D::new(x, y), Size2D::new(w, h))`.
pub const fn rect<T, U>(x: T, y: T, w: T, h: T) -> Rect<T, U> {
Rect::new(Point2D::new(x, y), Size2D::new(w, h))
}
#[cfg(test)]
mod tests {
use crate::default::{Point2D, Rect, Size2D};
use crate::side_offsets::SideOffsets2D;
use crate::{point2, rect, size2, vec2};
#[test]
fn test_translate() {
let p = Rect::new(Point2D::new(0u32, 0u32), Size2D::new(50u32, 40u32));
let pp = p.translate(vec2(10, 15));
assert!(pp.size.width == 50);
assert!(pp.size.height == 40);
assert!(pp.origin.x == 10);
assert!(pp.origin.y == 15);
let r = Rect::new(Point2D::new(-10, -5), Size2D::new(50, 40));
let rr = r.translate(vec2(0, -10));
assert!(rr.size.width == 50);
assert!(rr.size.height == 40);
assert!(rr.origin.x == -10);
assert!(rr.origin.y == -15);
}
#[test]
fn test_union() {
let p = Rect::new(Point2D::new(0, 0), Size2D::new(50, 40));
let q = Rect::new(Point2D::new(20, 20), Size2D::new(5, 5));
let r = Rect::new(Point2D::new(-15, -30), Size2D::new(200, 15));
let s = Rect::new(Point2D::new(20, -15), Size2D::new(250, 200));
let pq = p.union(&q);
assert!(pq.origin == Point2D::new(0, 0));
assert!(pq.size == Size2D::new(50, 40));
let pr = p.union(&r);
assert!(pr.origin == Point2D::new(-15, -30));
assert!(pr.size == Size2D::new(200, 70));
let ps = p.union(&s);
assert!(ps.origin == Point2D::new(0, -15));
assert!(ps.size == Size2D::new(270, 200));
}
#[test]
fn test_intersection() {
let p = Rect::new(Point2D::new(0, 0), Size2D::new(10, 20));
let q = Rect::new(Point2D::new(5, 15), Size2D::new(10, 10));
let r = Rect::new(Point2D::new(-5, -5), Size2D::new(8, 8));
let pq = p.intersection(&q);
assert!(pq.is_some());
let pq = pq.unwrap();
assert!(pq.origin == Point2D::new(5, 15));
assert!(pq.size == Size2D::new(5, 5));
let pr = p.intersection(&r);
assert!(pr.is_some());
let pr = pr.unwrap();
assert!(pr.origin == Point2D::new(0, 0));
assert!(pr.size == Size2D::new(3, 3));
let qr = q.intersection(&r);
assert!(qr.is_none());
}
#[test]
fn test_intersection_overflow() {
// test some scenarios where the intersection can overflow but
// the min_x() and max_x() don't. Gecko currently fails these cases
let p = Rect::new(Point2D::new(-2147483648, -2147483648), Size2D::new(0, 0));
let q = Rect::new(
Point2D::new(2136893440, 2136893440),
Size2D::new(279552, 279552),
);
let r = Rect::new(Point2D::new(-2147483648, -2147483648), Size2D::new(1, 1));
assert!(p.is_empty());
let pq = p.intersection(&q);
assert!(pq.is_none());
let qr = q.intersection(&r);
assert!(qr.is_none());
}
#[test]
fn test_contains() {
let r = Rect::new(Point2D::new(-20, 15), Size2D::new(100, 200));
assert!(r.contains(Point2D::new(0, 50)));
assert!(r.contains(Point2D::new(-10, 200)));
// The `contains` method is inclusive of the top/left edges, but not the
// bottom/right edges.
assert!(r.contains(Point2D::new(-20, 15)));
assert!(!r.contains(Point2D::new(80, 15)));
assert!(!r.contains(Point2D::new(80, 215)));
assert!(!r.contains(Point2D::new(-20, 215)));
// Points beyond the top-left corner.
assert!(!r.contains(Point2D::new(-25, 15)));
assert!(!r.contains(Point2D::new(-15, 10)));
// Points beyond the top-right corner.
assert!(!r.contains(Point2D::new(85, 20)));
assert!(!r.contains(Point2D::new(75, 10)));
// Points beyond the bottom-right corner.
assert!(!r.contains(Point2D::new(85, 210)));
assert!(!r.contains(Point2D::new(75, 220)));
// Points beyond the bottom-left corner.
assert!(!r.contains(Point2D::new(-25, 210)));
assert!(!r.contains(Point2D::new(-15, 220)));
let r = Rect::new(Point2D::new(-20.0, 15.0), Size2D::new(100.0, 200.0));
assert!(r.contains_rect(&r));
assert!(!r.contains_rect(&r.translate(vec2(0.1, 0.0))));
assert!(!r.contains_rect(&r.translate(vec2(-0.1, 0.0))));
assert!(!r.contains_rect(&r.translate(vec2(0.0, 0.1))));
assert!(!r.contains_rect(&r.translate(vec2(0.0, -0.1))));
// Empty rectangles are always considered as contained in other rectangles,
// even if their origin is not.
let p = Point2D::new(1.0, 1.0);
assert!(!r.contains(p));
assert!(r.contains_rect(&Rect::new(p, Size2D::zero())));
}
#[test]
fn test_scale() {
let p = Rect::new(Point2D::new(0u32, 0u32), Size2D::new(50u32, 40u32));
let pp = p.scale(10, 15);
assert!(pp.size.width == 500);
assert!(pp.size.height == 600);
assert!(pp.origin.x == 0);
assert!(pp.origin.y == 0);
let r = Rect::new(Point2D::new(-10, -5), Size2D::new(50, 40));
let rr = r.scale(1, 20);
assert!(rr.size.width == 50);
assert!(rr.size.height == 800);
assert!(rr.origin.x == -10);
assert!(rr.origin.y == -100);
}
#[test]
fn test_inflate() {
let p = Rect::new(Point2D::new(0, 0), Size2D::new(10, 10));
let pp = p.inflate(10, 20);
assert!(pp.size.width == 30);
assert!(pp.size.height == 50);
assert!(pp.origin.x == -10);
assert!(pp.origin.y == -20);
let r = Rect::new(Point2D::new(0, 0), Size2D::new(10, 20));
let rr = r.inflate(-2, -5);
assert!(rr.size.width == 6);
assert!(rr.size.height == 10);
assert!(rr.origin.x == 2);
assert!(rr.origin.y == 5);
}
#[test]
fn test_inner_outer_rect() {
let inner_rect = Rect::new(point2(20, 40), size2(80, 100));
let offsets = SideOffsets2D::new(20, 10, 10, 10);
let outer_rect = inner_rect.outer_rect(offsets);
assert_eq!(outer_rect.origin.x, 10);
assert_eq!(outer_rect.origin.y, 20);
assert_eq!(outer_rect.size.width, 100);
assert_eq!(outer_rect.size.height, 130);
assert_eq!(outer_rect.inner_rect(offsets), inner_rect);
}
#[test]
fn test_min_max_x_y() {
let p = Rect::new(Point2D::new(0u32, 0u32), Size2D::new(50u32, 40u32));
assert!(p.max_y() == 40);
assert!(p.min_y() == 0);
assert!(p.max_x() == 50);
assert!(p.min_x() == 0);
let r = Rect::new(Point2D::new(-10, -5), Size2D::new(50, 40));
assert!(r.max_y() == 35);
assert!(r.min_y() == -5);
assert!(r.max_x() == 40);
assert!(r.min_x() == -10);
}
#[test]
fn test_width_height() {
let r = Rect::new(Point2D::new(-10, -5), Size2D::new(50, 40));
assert!(r.width() == 50);
assert!(r.height() == 40);
}
#[test]
fn test_is_empty() {
assert!(Rect::new(Point2D::new(0u32, 0u32), Size2D::new(0u32, 0u32)).is_empty());
assert!(Rect::new(Point2D::new(0u32, 0u32), Size2D::new(10u32, 0u32)).is_empty());
assert!(Rect::new(Point2D::new(0u32, 0u32), Size2D::new(0u32, 10u32)).is_empty());
assert!(!Rect::new(Point2D::new(0u32, 0u32), Size2D::new(1u32, 1u32)).is_empty());
assert!(Rect::new(Point2D::new(10u32, 10u32), Size2D::new(0u32, 0u32)).is_empty());
assert!(Rect::new(Point2D::new(10u32, 10u32), Size2D::new(10u32, 0u32)).is_empty());
assert!(Rect::new(Point2D::new(10u32, 10u32), Size2D::new(0u32, 10u32)).is_empty());
assert!(!Rect::new(Point2D::new(10u32, 10u32), Size2D::new(1u32, 1u32)).is_empty());
}
#[test]
fn test_round() {
let mut x = -2.0;
let mut y = -2.0;
let mut w = -2.0;
let mut h = -2.0;
while x < 2.0 {
while y < 2.0 {
while w < 2.0 {
while h < 2.0 {
let rect = Rect::new(Point2D::new(x, y), Size2D::new(w, h));
assert!(rect.contains_rect(&rect.round_in()));
assert!(rect.round_in().inflate(1.0, 1.0).contains_rect(&rect));
assert!(rect.round_out().contains_rect(&rect));
assert!(rect.inflate(1.0, 1.0).contains_rect(&rect.round_out()));
assert!(rect.inflate(1.0, 1.0).contains_rect(&rect.round()));
assert!(rect.round().inflate(1.0, 1.0).contains_rect(&rect));
h += 0.1;
}
w += 0.1;
}
y += 0.1;
}
x += 0.1
}
}
#[test]
fn test_center() {
let r: Rect<i32> = rect(-2, 5, 4, 10);
assert_eq!(r.center(), point2(0, 10));
let r: Rect<f32> = rect(1.0, 2.0, 3.0, 4.0);
assert_eq!(r.center(), point2(2.5, 4.0));
}
#[test]
fn test_nan() {
let r1: Rect<f32> = rect(-2.0, 5.0, 4.0, std::f32::NAN);
let r2: Rect<f32> = rect(std::f32::NAN, -1.0, 3.0, 10.0);
assert_eq!(r1.intersection(&r2), None);
}
}