Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-07 06:25:32 +01:00
Code Issues Projects Releases Packages Wiki Activity

Upgrade to rustc 551a74dddd84cf01440ee84148ebd18bc68bd7c8.

Browse source
This commit is contained in:
Simon Sapin 2015-04-23 00:14:02 +02:00 • committed by Josh Matthews
parent 7b87085c18
commit ef8edd4e87
168 changed files with 2247 additions and 2408 deletions
Download patch file Download diff file Expand all files Collapse all files

29
components/util/bezier.rs
View file

@ -7,22 +7,21 @@
//! This is based on `WebCore/platform/graphics/UnitBezier.h` in WebKit.
use geom::point::Point2D;
use std::num::Float;
const NEWTON_METHOD_ITERATIONS: u8 = 8;
pub struct Bezier {
ax: f64,
bx: f64,
cx: f64,
ay: f64,
by: f64,
cy: f64,
ax: f32,
bx: f32,
cx: f32,
ay: f32,
by: f32,
cy: f32,
}
impl Bezier {
#[inline]
pub fn new(p1: Point2D<f64>, p2: Point2D<f64>) -> Bezier {
pub fn new(p1: Point2D<f32>, p2: Point2D<f32>) -> Bezier {
let cx = 3.0 * p1.x;
let bx = 3.0 * (p2.x - p1.x) - cx;
@ -40,23 +39,23 @@ impl Bezier {
}
#[inline]
fn sample_curve_x(&self, t: f64) -> f64 {
fn sample_curve_x(&self, t: f32) -> f32 {
// ax * t^3 + bx * t^2 + cx * t
((self.ax * t + self.bx) * t + self.cx) * t
}
#[inline]
fn sample_curve_y(&self, t: f64) -> f64 {
fn sample_curve_y(&self, t: f32) -> f32 {
((self.ay * t + self.by) * t + self.cy) * t
}
#[inline]
fn sample_curve_derivative_x(&self, t: f64) -> f64 {
fn sample_curve_derivative_x(&self, t: f32) -> f32 {
(3.0 * self.ax * t + 2.0 * self.bx) * t + self.cx
}
#[inline]
fn solve_curve_x(&self, x: f64, epsilon: f64) -> f64 {
fn solve_curve_x(&self, x: f32, epsilon: f32) -> f32 {
// Fast path: Use Newton's method.
let mut t = x;
for _ in 0..NEWTON_METHOD_ITERATIONS {
@ -98,7 +97,7 @@ impl Bezier {
}
#[inline]
pub fn solve(&self, x: f64, epsilon: f64) -> f64 {
pub fn solve(&self, x: f32, epsilon: f32) -> f32 {
self.sample_curve_y(self.solve_curve_x(x, epsilon))
}
}
@ -107,9 +106,9 @@ trait ApproxEq {
fn approx_eq(self, value: Self, epsilon: Self) -> bool;
}
impl ApproxEq for f64 {
impl ApproxEq for f32 {
#[inline]
fn approx_eq(self, value: f64, epsilon: f64) -> bool {
fn approx_eq(self, value: f32, epsilon: f32) -> bool {
(self - value).abs() < epsilon
}
}