Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-28 16:48:22 +01:00
Code Issues Projects Releases Packages Wiki Activity

Interpolate colors with premultiplied alpha.

Browse source 
We need to clamp each interpolated values because some cubic-bezier functions
produce values that are out of range [0, 1].
This commit is contained in:
Hiroyuki Ikezoe 2016-12-26 15:28:00 +09:00
parent 7e3c9e2197
commit 3320457c07
3 changed files with 54 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

36
tests/unit/style/animated_properties.rs Normal file
View file

@ -0,0 +1,36 @@
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use cssparser::{Color, RGBA};
use style::properties::animated_properties::Interpolate;
#[test]
fn test_rgba_color_interepolation() {
assert_eq!(Color::RGBA(RGBA { red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0 }).interpolate(
&Color::RGBA(RGBA { red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0 }), 1.0).unwrap(),
Color::RGBA(RGBA { red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0 }));
assert_eq!(Color::RGBA(RGBA { red: 1.0, green: 0.0, blue: 0.0, alpha: 0.6 }).interpolate(
&Color::RGBA(RGBA { red: 0.0, green: 1.0, blue: 0.0, alpha: 0.4 }), 0.5).unwrap(),
Color::RGBA(RGBA { red: 0.6, green: 0.4, blue: 0.0, alpha: 0.5 }));
// Some cubic-bezier functions produce values that are out of range [0, 1].
// Unclamped cases.
assert_eq!(Color::RGBA(RGBA { red: 0.3, green: 0.0, blue: 0.0, alpha: 0.4 }).interpolate(
&Color::RGBA(RGBA { red: 0.0, green: 1.0, blue: 0.0, alpha: 0.6 }), -0.5).unwrap(),
Color::RGBA(RGBA { red: 0.6, green: 0.0, blue: 0.0, alpha: 0.3 }));
assert_eq!(Color::RGBA(RGBA { red: 1.0, green: 0.0, blue: 0.0, alpha: 0.6 }).interpolate(
&Color::RGBA(RGBA { red: 0.0, green: 0.3, blue: 0.0, alpha: 0.4 }), 1.5).unwrap(),
Color::RGBA(RGBA { red: 0.0, green: 0.6, blue: 0.0, alpha: 0.3 }));
// Clamped cases.
assert_eq!(Color::RGBA(RGBA { red: 1.0, green: 0.0, blue: 0.0, alpha: 0.8 }).interpolate(
&Color::RGBA(RGBA { red: 0.0, green: 1.0, blue: 0.0, alpha: 0.2 }), -0.5).unwrap(),
Color::RGBA(RGBA { red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0 }));
assert_eq!(Color::RGBA(RGBA { red: 1.0, green: 0.0, blue: 0.0, alpha: 0.8 }).interpolate(
&Color::RGBA(RGBA { red: 0.0, green: 1.0, blue: 0.0, alpha: 0.2 }), 1.5).unwrap(),
Color::RGBA(RGBA { red: 0.0, green: 0.0, blue: 0.0, alpha: 0.0 }));
}

1
tests/unit/style/lib.rs
View file

@ -22,6 +22,7 @@ extern crate style;
extern crate style_traits;
extern crate test;
mod animated_properties;
mod atomic_refcell;
mod attr;
mod cache;